CN114771366B

CN114771366B - Enclosed unlocking handle

Info

Publication number: CN114771366B
Application number: CN202210332341.3A
Authority: CN
Inventors: 高源�; 周诚; 马晓亮
Original assignee: Yanfeng International Seating Systems Co Ltd
Current assignee: Yanfeng International Seating Systems Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2024-02-23
Anticipated expiration: 2042-03-30
Also published as: CN114771366A

Abstract

The invention discloses a closed unlocking handle, which comprises a base and a handle assembly, wherein the handle assembly comprises: unlocking the handle; the first connecting rod and the second connecting rod are hinged on the unlocking handle; a first mounting notch and a sector gear are arranged on the first connecting rod; a pressing rod hinged in the first mounting notch; the handle seat is hinged on the first connecting rod and the second connecting rod, is also hinged on the base and is connected with the unlocking inhaul cable; at least one third connecting rod hinged on the compression bar and the handle seat at the same time; a damping mechanism mounted on the handle seat, wherein a gear in the damping mechanism is meshed with the sector gear; one end of the spring acts on a hinging point between the compression bar and the first connecting rod, and the other end acts on a hinging point between the third connecting rod and the handle seat; one end of the torsion spring acts on the handle seat, and the other end acts on the base. The invention adopts the curve unlocking principle, and utilizes the third connecting rod stress principle in an arc shape to adjust the unlocking force curve in the whole unlocking process, so that the unlocking process is smoother.

Description

Enclosed unlocking handle

Technical Field

The invention relates to the technical field of seats, in particular to the technical field of backrest unlocking parts, and particularly relates to a closed unlocking handle.

Background

Along with the demand of people for seven-seat automobiles is higher and higher, the whole automobile is limited by cost and weight, and the second-row seats are required to be added with easy-access functions (quick unlocking of the backrest), so that the third-row passengers can get in and out conveniently. Currently, there are various back seat back unlocking structures available in the market, including a pull handle case disposed above the seat back, a pull strap disposed on the back of the seat back, a handle disposed on the side of the seat cushion, and the like. The handle on the side edge of the seat cushion is limited in space at the installation position, installation and unlocking operations are not convenient, and the handle box above the backrest is not convenient to operate, so that whether the seat can be adjusted in place or not can not be confirmed after the operation.

Some unlocking handles have small unlocking force, close front surface and attractive appearance, but the rear space occupation is large, which is not beneficial to head collision protection or large front space occupation and poor riding comfort. Chinese patent application publication No. CN108544991a discloses a seat back unlocking structure, which comprises a handle base and a handle, wherein the handle base has a box-like structure and is fixed at the upper part of the back of the seat; the handle is of a plate-shaped structure and is rotatably covered on the handle base, the lower end of the handle is provided with a protruding part extending inwards, and the handle base is provided with a through hole for the protruding part to pass through; when the handle rotates relative to the handle base, the rotating position of the handle is positioned through the limiting structure; the seat angle adjuster further comprises an unlocking wire drawing, one end of the unlocking wire drawing is fixed to the protruding portion, and the other end of the unlocking wire drawing is fixed to the seat angle adjuster.

Some unlocking handles can save space and are beneficial to head impact protection, but the unlocking handles have large unlocking force and open holes on the front surface, so that the unlocking handles are not attractive.

The harness (Cable) end force for unlocking the backrest depends on the harness of the recliner, and the force for unlocking the backrest is unchanged without changing the framework structure and the harness. Referring to fig. 1, energy=unlock force (F) ×unlock stroke (L), if unlock force F is small (F (small)), unlock stroke L becomes long (L (long)), and if unlock force F is large (F (large)), unlock stroke L becomes short (L (short)), which results in that the unlock force and the spatial appearance of the existing unlock lever cannot be compatible.

Disclosure of Invention

The invention aims to solve the technical problem that the unlocking force and the space appearance of the existing unlocking handle cannot be combined, and provides the closed unlocking handle which can ensure that the space occupation is minimum, simultaneously can realize the opening angle and the height which accord with the human engineering and meet the proper unlocking force.

In order to achieve the object of the present invention, a closed type unlocking handle of the present invention includes a base and a handle assembly installed in an inner cavity of the base, the base is installed on a seat frame, wherein the handle assembly includes:

an unlocking handle;

the first connecting rod and the second connecting rod are hinged on the unlocking handle; a first mounting notch and a sector gear are arranged on the first connecting rod;

a pressing rod hinged in the first mounting notch;

the handle seat is hinged on the first connecting rod and the second connecting rod, and is also hinged on the base and connected with the unlocking inhaul cable;

at least one third connecting rod hinged on the compression bar and the handle seat at the same time;

a damping mechanism mounted on the handle base, the gear in the damping mechanism being meshed with the sector gear;

one end of the spring acts on a hinging point between the compression bar and the first connecting rod, and the other end of the spring acts on a hinging point between the third connecting rod and the handle seat;

and one end of the torsion spring acts on the handle seat, and the other end acts on the base.

In a preferred embodiment of the present invention, a second mounting notch is formed on the unlocking handle, and the face cover portion of the pressing rod is embedded into the second mounting notch; the outer surface of the face cover portion is flush with the outer surface of the unlocking handle.

In a preferred embodiment of the present invention, the first link and the second link are hinged on an inner surface of the unlocking handle facing the direction of the internal cavity of the base, and the inner surface of the unlocking handle is opposite to an outer surface of the unlocking handle; the hinging point between the pressure bar and the first connecting rod and the hinging point between the pressure bar and the third connecting rod are positioned on the inner surface of the pressure bar facing the direction of the inner cavity of the base, and the outer surface of the pressure bar and the inner surface of the pressure bar are two surfaces opposite to each other.

In a preferred embodiment of the present invention, a catch portion is provided on an inner surface of the unlocking handle, and the catch portion and the second mounting notch are provided on both ends of the unlocking handle in a direction not parallel to a movement direction of the unlocking handle.

In a preferred embodiment of the present invention, the handle portion of the unlocking handle has a first inclined surface matching with a side wall of the base, a second inclined surface is disposed on the top inner side of the side wall of the base, and when the unlocking handle is in the locked state, the unlocking handle completely covers the upper opening of the internal cavity of the base, and the first inclined surface contacts with the second inclined surface.

In a preferred embodiment of the invention, the hinge point between the first link and the unlocking handle, the hinge point between the first link and the pressing rod, and the hinge point between the first link and the handle base are located on a straight line, wherein the straight line is located in a direction which is not parallel to the movement direction of the first link, and the hinge point between the first link and the pressing rod is located between the hinge point between the first link and the unlocking handle and the hinge point between the first link and the handle base.

In a preferred embodiment of the present invention, the hinge point between the second link and the unlocking handle and the hinge point between the second link and the handle base are provided separately at both ends of the second link in a direction non-parallel to the movement direction of the second link.

In a preferred embodiment of the present invention, the hinge point between the pressing rod and the third link and the hinge point between the pressing rod and the first link are located on a diagonal line having an angle with the outer surface of the pressing rod.

In a preferred embodiment of the present invention, the articulation points between the handle base and the base, the articulation points between the handle base and the first link, the articulation points between the handle base and the second link, the articulation points between the handle base and the third link, and the connection points between the handle base and the unlocking cable are distributed in a non-linear manner.

In a preferred embodiment of the invention, the first, second, third and compression bars are accommodated in the handle holder.

In a preferred embodiment of the present invention, a first accommodation chamber and a second accommodation chamber are provided in the handle holder in communication with each other, the first link, the second link, and a part of the pressing lever are accommodated in the first accommodation chamber, and the other part of the pressing lever, a sector gear in the first link, and the third link are accommodated in the second accommodation chamber.

In a preferred embodiment of the present invention, a damping mechanism accommodating chamber is formed on a side wall of the second accommodating chamber, the damping mechanism is accommodated in the damping mechanism accommodating chamber, and a gear in the damping mechanism extends into the second accommodating chamber.

In a preferred embodiment of the present invention, the third link is arc-shaped, and the spring is a tension spring.

In a preferred embodiment of the invention, the length of the tension spring in the initial state of the unlocking handle is longer than the original length of the tension spring but smaller than the corresponding length of the tension spring in the unlocking state of the unlocking handle.

In a preferred embodiment of the present invention, the distance between the grip portion of the unlocking handle and the hinge point between the handle base and the base is more than 1.5 times the distance between the hinge point between the handle base and the connection point between the handle base and the unlocking cable.

In a preferred embodiment of the invention, the closed-type unlocking handle may be used for easy access unlocking or unlocking of the center rest.

Due to the adoption of the technical scheme, the unlocking force curve in the whole unlocking process is adjusted by adopting the curve unlocking principle and utilizing the arc third connecting rod stress principle, so that the unlocking process is smoother, and the unlocking force curve unlocking device has the following characteristics in particular compared with the prior art:

1. the occupied space is small, the riding comfort is not affected, and the head impact protection effect is improved.

2. Compared with the prior compact unlocking handle, the unlocking force is reduced by 1/3.

3. And (3) fully-closed molding, wherein the front surface is not provided with an opening.

Drawings

Fig. 1 is a schematic diagram of a relationship between an unlocking force and an unlocking stroke of a conventional unlocking handle.

Fig. 2 is a schematic view of the present invention with the enclosed unlocking handle mounted on a seat.

Fig. 3 is an exploded view of the enclosed unlocking handle of the present invention.

FIG. 4 is an exploded view of the handle assembly in the enclosed unlocking handle of the present invention.

FIG. 5 is a schematic view of the assembly process between the unlocking handle, the first link and the second link in the handle assembly of the present invention.

FIG. 6 is a schematic view of the handle assembly of the present invention, from one direction, after assembly of the unlock handle, the first link, and the second link.

FIG. 7 is a schematic view of the handle assembly of the present invention from another direction after assembly of the unlock handle, first link, and second link.

FIG. 8 is a schematic view of the assembly process between the unlocking handle, the first link, the second link, the compression bar, and the third link in the handle assembly of the present invention.

FIG. 9 is a schematic view of the handle assembly of the present invention from one direction after assembly of the unlocking handle, the first link, the second link, the compression bar, and the third link.

FIG. 10 is a schematic view of the handle assembly of the present invention from another direction after assembly of the release handle, first link, second link, plunger, and third link.

FIG. 11 is a schematic view of the assembly process of the handle assembly of the present invention between the unlocking handle, the first link, the second link, the compression bar, the third link, the handle mount, and the damping mechanism.

FIG. 12 is a schematic view of the handle assembly of the present invention, from one direction, after assembly of the unlocking handle, first link, second link, plunger, third link, handle mount, and damping mechanism.

FIG. 13 is a schematic view of the handle assembly of the present invention from another direction after the assembly of the release handle, first link, second link, plunger, third link, handle mount, and damping mechanism.

Fig. 14 is a schematic view showing an assembly process of the closed-type unlocking handle of the present invention.

Fig. 15 is a schematic view of the present invention from one direction after the assembly of the closed-type unlocking handle.

Fig. 16 is a schematic view of the enclosed release handle of the present invention from another direction after assembly.

FIG. 17 is a force analysis schematic of a prior art compact unlock handle.

FIG. 18 is a force analysis schematic of a closed-type unlocking handle of the present invention.

FIG. 19 is a force analysis schematic view of the present invention with the enclosed unlocking handle in a locked hold condition.

FIG. 20 is a schematic diagram illustrating a force analysis of a closed-type unlocking handle in a ready-to-unlock state according to the present invention.

Fig. 21 is a schematic view of the present invention in a lock-hold state of the closed-type unlocking handle (seen from the damping mechanism side).

Fig. 22 is a schematic view of the closed-type unlocking handle of the present invention in a ready-to-unlock state (seen from the damping mechanism side).

FIGS. 23a to 23e are schematic views showing the operation of the closed type unlocking handle of the present invention (seen from the spring side)

FIGS. 24a to 24e are schematic views showing the operation of the closed-type unlocking handle of the present invention (seen from the damping mechanism side)

Fig. 25 is a schematic view of the present invention's closed-type unlocking handle applied to a center armrest of a seat.

Detailed Description

The invention is further described below with reference to the drawings and detailed description.

Referring to fig. 2 to 24, there is shown a closed type unlocking handle for easy entry unlocking of a seat, and particularly to fig. 2, which is mounted on a seat back 000 of a second row seat for unlocking the seat back of the second row, facilitating entry and exit of a third row passenger.

Referring particularly to fig. 2 and 3, the enclosed unlocking handle specifically includes a base 100 and a handle assembly 200 mounted in the interior cavity 110 of the base 100. The base 100 is typically mounted to a back frame, i.e., the seat back 000.

The interior cavity 110 of the base 100 is generally square or rectangular and is surrounded by four base side walls 111, 112, 113, 114, with the upper portions of the four base side walls 111, 112, 113, 114 each having a flange. A second inclined surface 111a is provided on the top inner side of one side wall 111 of the base 100.

Referring to fig. 15 to 16 in combination, coaxial spindle holes 112a, 114a are formed in the base side walls 112 and 114 of the base 100 and limit bosses 112b and 114b are provided at the bottoms of the base side walls 112 and 114.

Referring to fig. 4 in combination, the handle assembly 200 includes an unlocking handle 210, a first link 220, a second link 230, a pressing lever 240, a pair of third links 250, a handle mount 260, a damping mechanism 270, a spring 280, and a rotation shaft 410 and a pair of torsion springs 420 shown in fig. 3.

Referring to fig. 5, the unlocking handle 210 has a substantially plate-like structure having an inner surface 212 and an outer surface 211 disposed opposite to each other. A second mounting notch 213 is also formed in the unlocking handle 210, and a pair of hinge pins 214, a hinge pin 215 and a catch 216 are formed on the inner surface of the unlocking handle 210, and hinge pin holes 214a and 215a parallel to each other are formed in the pair of hinge pins 214 and the hinge pin 215. The catch portion 216 and the second mounting notch 213 are provided on both ends of the unlocking handle 210 and the non-parallel direction 217 of the movement direction arrow K (see fig. 23 b) of the unlocking handle 210. The hinge ear seat 215 is positioned between the second mounting notch 213 and the buckle part 216, and a pair of hinge ear seats 214 are respectively arranged at two sides between the hinge ear seat 215 and the second mounting notch 213; the latch portion 216 has a first inclined surface 216a.

The first link 220 and the second link 230 are each substantially plate-shaped structures (of course, not limited to plate-shaped structures). A first mounting notch 221 and a sector gear 222 are disposed on the first link 220; three hinge shaft holes 223, 224, 225 are formed in the first link 220, and the three hinge shaft holes 223, 224, 225 are positioned on a straight line in a non-parallel direction 226 to a moving direction J (see fig. 23 b) of the first link 220, with the hinge shaft hole 224 being positioned between the hinge shaft holes 223 and 225. The width of the first link 220 perpendicular to the non-parallel direction 226 should be equal to or slightly less than the width between the pair of hinge eyes 214 so that the first link 220 snaps between the pair of hinge eyes 214.

A third mounting notch 231 is disposed on the second link 230; two hinge shaft holes 232, 233 are formed in the second link 230, and the two hinge shaft holes 222, 233 are provided at both ends of the non-parallel direction 234 of the movement direction J' (see fig. 23 b) of the second link 230.

The compression bar 240 has an outer surface 241 and an inner surface 242 disposed opposite to each other, two triangular bosses 243 are symmetrically disposed on the inner surface 242, two hinge holes 244 and 245 are disposed at two ends of each triangular boss 243 adjacent to the inclined edge 243a, and the hinge holes 244 and 245 are disposed on inclined lines forming an angle with the outer surface 241 of the compression bar 240.

The pair of third connecting rods 250 are arc-shaped, one end of each third connecting rod 250 in the length direction is respectively provided with a hinge hole 251, the other end of each third connecting rod 250 in the length direction is connected through a connecting rod 252, and the width of the connecting rod 252 is equal to or slightly smaller than the interval distance between the two triangular bosses 243. A hinge shaft hole 252a is formed in the connection rod 252, and the hinge shaft hole 252a is parallel to the hinge shaft hole 251.

The handle seat 260 is generally seat-shaped, and has a first accommodating cavity 261 and a second accommodating cavity 262 communicated with each other inside, wherein the first accommodating cavity 261 is surrounded by a pair of accommodating cavity walls 261a and 261b, and the second accommodating cavity 262 is surrounded by a pair of accommodating cavity walls 262a and 262 b; the top of the pair of receiving chamber walls 261a, 261b is connected with the bottom of the pair of receiving chamber walls 262a, 262b through the pair of side receiving chamber walls 261c, 261d, and the top of the pair of receiving chamber walls 262a, 262b is connected with the one receiving chamber wall 262c, so that the handle holder 260 forms a stable structure.

At the top of the pair of receiving chamber walls 262a, 262b are symmetrically disposed torsion spring-acting ears 263a, 263b protruding from a pair of opposite sides and turned over at the ends.

A pair of housing walls 261a, 261b are provided with a hinge shaft hole 261aa, 261ba, 261ab, 261bb at each of the upper and lower positions, the hinge shaft holes 261aa, 261ba being coaxial, the hinge shaft holes 261ab, 261bb being coaxial.

The pair of receiving chamber walls 262a, 262b are each provided with a hinge shaft hole 262aa, 262ba, 262ab, 262bb near the top, the hinge shaft holes 262aa, 262ba being coaxial, the hinge shaft holes 262ab, 262bb being coaxial. The hinge shaft holes 262aa, 262ab are located on the front and rear sides of the torsion spring acting lugs 263a, and the hinge shaft holes 262ba, 262bb are located on the front and rear sides of the torsion spring acting lugs 263a, 263b.

A damper mechanism accommodating chamber 262bc is also provided in the accommodating chamber wall 262 b. An unlocking cable connection lug 262d is provided on the receiving chamber wall 262 c.

The handle assembly 200 of the present invention is assembled as follows:

referring to fig. 5 to 7, one end of the first link 220 having the hinge hole 223 is caught between the pair of hinge eyes 214 of the unlocking handle 210, and then the two rotating shafts 301 are respectively passed through the hinge holes 214a and the hinge holes 223 of the pair of hinge eyes 214, so that the first link 220 is hinged on the inner surface 212 (toward the inner cavity 110 of the base 100) of the unlocking handle 210, forming a hinge point a between the first link 220 and the unlocking handle 210.

The second mounting notch 231 of the second link 230 is snapped onto the hinge pin holder 215 of the unlocking handle 210, and then a rotation shaft 302 is passed through the hinge pin hole 232 of the second link 230 and the hinge pin hole 215a of the hinge pin holder 215, so that the second link 230 is hinged on the inner surface 212 (toward the inner cavity 110 of the base 100) of the unlocking handle 210, forming a hinge point B between the second link 230 and the unlocking handle 210.

Referring to fig. 8 to 10, the connection rod 252 at the other end of the third link 250 is caught between the two triangular bosses 243 of the pressing rod 240, and then the rotation shaft 303 is inserted into the hinge shaft holes 244 in the two triangular bosses 243 and the hinge shaft holes 252a of the connection rod 252, so that the third link 250 is hinged with the inner surface 242 of the pressing rod 240, forming a hinge point C between the pressing rod 240 and the third link 250. The hinge point C between the plunger 240 and the third link 250 is located on the inner surface 242 of the plunger 240 in a direction toward the interior cavity 110 of the base 100.

The face cover portion of the pressing lever 240 is inserted into the second mounting notch 213 of the unlocking handle 210 such that the outer surface 241 of the face cover portion is flush with the outer surface 211 of the unlocking handle 210. Then, the two triangular bosses 243 of the pressing rod 240 are clamped into the first mounting notch 221 of the first connecting rod 220, and one rotating shaft 304 passes through the hinge shaft hole 224 of the first connecting rod 220 and the hinge shaft holes 245 on the two triangular bosses 243, so that the pressing rod 240 is hinged on the first connecting rod 220, and a hinging point D between the first connecting rod 220 and the pressing rod 240 is formed. The hinge point D between the first link 220 and the plunger 240 is also located on the inner surface 242 of the plunger 240 in a direction toward the interior cavity 110 of the base 100.

Referring to fig. 11 to 13, the assembled first link 220, second link 230, third link 250, and pressing bar 240 are inserted into the handle holder 260, specifically: the first link 220, the second link 230, and a portion of the pressing lever 240 are received in the first receiving cavity 261 of the handle holder 260, and the other portion of the pressing lever 240, the sector gear 222 in the first link 220, and the third link 250 are received in the second receiving cavity 262 of the handle holder 260 while the hinge holes 225 on the first link 220 are aligned with the hinge holes 261aa, 261ba on the handle holder 260, the hinge holes 233 on the second link 230 are aligned with the hinge holes 261ab, 261bb on the handle holder 260, and the hinge holes 251 on the pair of third links 250 are aligned with the hinge holes 262ab, 262bb on the handle holder 260.

Then, a rotation shaft 306 is inserted through the hinge shaft hole 225 of the first link 220 and the hinge shaft holes 261aa, 261ba of the handle holder 260, so that the first link 220 is hinged with the handle holder 260, forming a hinge point E between the first link 220 and the handle holder 260.

Then, a rotation shaft 307 is inserted through the hinge shaft hole 233 of the second link 230 and the hinge shaft holes 261ab, 261bb of the handle holder 260, so that the second link 230 is hinged with the handle holder 260, and a hinge point F between the second link 230 and the handle holder 260 is formed.

A spring shaft 205 is then passed through the hinge shaft hole 251 of the third link 250 and the hinge shaft holes 262ab, 262bb of the handle holder 260, such that the third link 250 is hinged to the handle holder 260, forming a hinge point G between the handle holder 260 and the third link 250.

The spring is a tension spring 280, the tension spring 280 is placed in the second accommodating cavity 262 of the handle seat 260 and between the two triangular bosses 243 of the pressing rod 240, and one end of the tension spring 280 is hooked on the spring shaft 205, and the other end is hooked on the rotating shaft 304.

Finally, the handle assembly 200 of the present invention is assembled by accommodating the damping mechanism 270 within the damping mechanism accommodating chamber 262bc of the handle holder 260 such that the gear 271 in the damping mechanism 270 extends into the second accommodating chamber 262 to engage with the sector gear 222 in the first link 220.

After the handle assembly 200 of the present invention is assembled, the hinge point a between the first link 220 and the unlocking handle 210, the hinge point D between the first link 220 and the pressing lever 240, and the hinge point E between the first link 220 and the handle base 260 are located on a straight line, wherein the straight line is located in the non-parallel direction 226 with the movement direction J (see fig. 23 b) of the first link 220, and the hinge point D between the first link 220 and the pressing lever 240 is located between the hinge point a between the first link 220 and the unlocking handle 210 and the hinge point E between the first link 220 and the handle base 260.

The hinge point B between the second link 230 and the unlocking handle 210 and the hinge point F between the second link 230 and the handle holder 260 are provided at both ends of the second link 230 in a direction not parallel to the moving direction J' of the second link 230.

The hinge point C between the pressing lever 240 and the third link 250 and the hinge point D between the pressing lever 240 and the first link 220 are located on oblique lines forming an angle with the outer surface 241 of the pressing lever 240.

Referring to fig. 3, 14 to 16, after the handle assembly 200 of the present invention is assembled, the assembled handle assembly 200 and the pair of torsion springs 420 are placed into the inner cavity 110 of the base 100 and the pair of torsion springs 420 are separated at both sides of the handle assembly 200 while the loop portions of the pair of torsion springs 420 are aligned with the rotation shaft holes 112a of the base side wall 112, the rotation shaft holes 114a of the base side wall 114 and the hinge shaft holes 262aa, 262bb of the handle holder 260, and one rotation shaft 410 is passed through the rotation shaft holes 112a of the base side wall 112, the rotation shaft holes 114a of the base side wall 114, the pair of torsion springs 420 and the hinge shaft holes 262aa, 262bb of the handle holder 260, so that the handle assembly 200 of the present invention is assembled with the base 100 while the hinge point H between the handle holder 260 and the base 100 is formed.

When the handle assembly 200 of the present invention is assembled with the base 100, one end 421 of the pair of torsion springs 420 acts on the base side wall 113 and the other end 422 acts on torsion spring-acting ears 263a, 263b of the handle base 260, respectively.

The hinging point H between the handle seat 260 and the base 100, the hinging point E between the handle seat 260 and the first connecting rod 220, the hinging point F between the handle seat 260 and the second connecting rod 230, the hinging point G between the handle seat 260 and the third connecting rod 250, and the connection point between the handle seat 260 and the unlocking cable, namely the unlocking cable connection lug 262d, are in nonlinear distribution.

After the handle assembly 200 of the present invention is assembled, the pair of receiving chamber walls 261a, 261b in the handle base 260 are in contact with the limit ledges 112b and 114b at the bottom of the base side walls 112 and 114, and are restrained by the limit ledges 112b and 114b at the bottom of the base side walls 112 and 114.

The following analysis, in conjunction with fig. 17 and 18, of the unlocking force of the present invention is reduced by 1/3 as compared to the prior compact unlocking handle.

Referring to fig. 17, for a compact unlocking handle, the arm of force between the catch 11 of the unlocking handle 10 and the rotation point 12 of the unlocking handle 10 is L1 (the arm of force L1 distance is short because the catch 11 of the unlocking handle 10 does not completely close the opening of the base 20), and the arm of force between the rotation point 12 of the unlocking handle 10 and the unlocking cable connection point 13 is L2, then the upward unlocking force f1= (f2 x L2)/L1, F2 applied at the catch 11 of the unlocking handle 10 is the unlocking force of the unlocking cable.

Referring to fig. 18, for the closed type unlocking handle of the present invention, the arm of force between the grip portion 216 of the unlocking handle 210 and the hinge point H (hinge point H between the handle base 260 and the base 100) is L1 '(because the unlocking handle 210 completely closes the opening of the base 20, the arm of force L1' is longer than the arm of force L1 by about 1/3), the arm of force between the hinge point H (hinge point H between the handle base 260 and the base 100) and the unlocking cable connection lug 262d on the handle base 260 is L2, and then the upward unlocking force f1 '= (f2×l2)/L1' F2 is the unlocking force of the unlocking cable applied to the grip portion 216 of the unlocking handle 210.

Since the distance L1' between the grip portion 216 of the unlocking handle 210 and the hinge point H between the handle holder 260 and the base 100 is 1.5 times the distance L2 between the hinge point H between the handle holder 260 and the base 100 and the unlocking cable connection lug 262d (i.e., unlocking cable connection point), namely: l1'≡1.5 x L2, an upward unlocking force f1' ≡0.67 x F2 is applied to the clasp portion 216 of the unlocking handle 210.

Referring to fig. 19 and 20, the moment M1 acting on the first link 220 during the process of converting the closed type unlocking handle from the initial state to the ready-to-unlock state is substantially equal to the moment M1 'acting on the first link 220 during the process of returning from the ready-to-unlock state to the initial state, and has no change, so that the complete resetting after the unlocking handle is released is ensured, M1 and M1' are almost the same, which means that no obvious weakening or strengthening of the restoring moment occurs during the process from the initial state to the ready-to-unlock state, and the unlocking handle 210 can implement a graceful and uniform restoring process instead of the deceleration/acceleration restoration through the consumption of the damping mechanism 270.

In the initial state, the force of the tension spring 280 acting on the hinging point D between the first link 220 and the compression rod 240 is set to be F3, the original length of the tension spring 280 is L (the value of 15 mm), the length of the tension spring 280 in the initial state is L3 (the value of 30 mm), and f3= (L3-L) x k. Moment m1=f3×cos θ×r= (L3-L) ×cos θ×k acting on the first link 220, where θ is an angle between the axis of the tension spring 280 and the normal line of the first link 220, and R is a distance between a hinge point D (hinge point D between the first link 220 and the compression lever 240) and a hinge point E (hinge point E between the first link 220 and the handle holder 260). In addition, the length L3 (30 mm) of the tension spring 280 in the initial state is greater than the original length L (15 mm) of the tension spring 280, so that the force F3 exerted by the tension spring 280 on the hinge point D between the first link 220 and the compression bar 240 tightens the unlocking handle 210 in the initial state through the hinge point D between the first link 220 and the compression bar 240 and the hinge point a between the first link 220 and the unlocking handle 210, and tightens the compression bar 240 in the initial state through the hinge point D between the first link 220 and the compression bar 240, so that the unlocking handle 210 and the compression bar 240 can tightly cover the upper opening of the internal cavity 110 of the base 100, and the upper opening of the internal cavity 110 of the base 100 is completely closed.

From the initial state to the ready-to-unlock state, the tension spring 280 is elongated, L3 increases from 30mm to 40mm (L3 '), then (L3 ' -L)/(L3-L) =1.6, and the θ angle increases from 0 ° (θ) to 50 ° (θ '), then: cosθ '/cosθ=0.64, so that in the ready-to-unlock state, the moment M1' =f3 '×cosθ' ×r= (L3 '-L) ×cosθ' ×k≡m1 acting on the first link 220 makes it unnecessary to apply much force to bring the lever 240 and the unlock lever 210 from the initial state into the ready-to-unlock state.

Referring to fig. 21 and 22, in addition, by the muscle-increasing damping mechanism 270, under the action of the damping mechanism 270, the unlocking handle 210 is enabled to realize uniform energy damage, so that the constant restoring moment on the first connecting rod 220 and the action of the damping mechanism 270 ensure gradual restoration of the unlocking handle 210, so that the damping ensures slow and uniform restoration of the handle, and a user is ensured to obtain sufficient unlocking time (the unlocking is not performed after the handle is opened); meanwhile, from the aspect of design aesthetic, the slow and uniform recovery process can improve the delicacy of parts (reference armrest boxes, cup holders and the like). The time for restoring the unlocking handle 210 is further achieved by adjusting the damping of the damping mechanism 270 to be large.

The working principle of the closed type unlocking handle of the present invention will be described in detail with reference to fig. 23a to 23e and fig. 24a to 24e, as follows:

referring to fig. 23a and 24a, when the closed type unlocking handle of the present invention is in an initial state, i.e., when the unlocking handle 210 is in a locked state, i.e., an initial state, a force F3 of the tension spring 280 acting on the hinge point D between the first link 220 and the compression bar 240 will pull the unlocking handle 210 in the initial state through the hinge point D between the first link 220 and the compression bar 240, the hinge point a between the first link 220 and the unlocking handle 210, and simultaneously pull the compression bar 240 in the initial state through the hinge point D between the first link 220 and the compression bar 240, so that the unlocking handle 210 and the compression bar 240 can tightly cover the upper opening of the internal cavity 110 of the base 100, and the first inclined surface 216a of the buckling part 216 of the unlocking handle 210 is completely contacted with the second inclined surface 111a at the top of the one side seat wall 111 of the base 100, so that the unlocking handle 210 is combined with the compression bar 240, the upper opening of the internal cavity 110 of the base 100 is completely closed, and foreign matters are prevented from being introduced into the closed type unlocking handle of the present invention, at this time, the first link 220, the second link 230, the tension spring 280, the third link 250, and the damping mechanism 270 are in the initial state.

The pair of receiving chamber walls 261a, 261b in the handle socket 260 are in contact with the limit ledges 112b and 114b at the bottom of the base side walls 112 and 114, and are restrained by the limit ledges 112b and 114b at the bottom of the base side walls 112 and 114.

Referring to fig. 23b and 24b, when the unlocking is ready, the lever 240 is lightly pressed (due to the moment m1' ≡m1 (moment when the unlocking is ready) acting on the first link 220 in the initial state), so that it is unnecessary to take much force for the lever 240 and the unlocking lever 210 to enter the unlocking-ready state from the initial state.

After the pressing rod 240 is pressed down, the pressing rod 240 stretches the tension spring 280 through a hinging point D between the first connecting rod 220 and the pressing rod 240, and meanwhile drives the first connecting rod 220 to turn around a hinging point E of the first connecting rod 220 and the handle seat 260 according to a movement direction J of the first connecting rod 220 through the hinging point D.

In the process of turning the first link 220 around the hinge point E of the first link 220 and the handle seat 260 according to the movement direction J of the first link 220, the unlocking handle 210 is driven to turn upwards (in the direction of arrow K in the figure) to enter a ready-to-unlock state through the hinge point a between the first link 220 and the unlocking handle 210.

In the process that the lock handle 210 is turned upwards (in the direction of arrow K in the figure) to enter the ready-to-unlock state, the hinging point B of the second connecting rod 230 and the unlock handle 210 drives the second connecting rod 230 to turn around the hinging point F of the second connecting rod 230 and the handle seat 260 according to the movement direction J' of the second connecting rod 220, and the ready-to-unlock state is entered.

The pressing rod 240 drives the third connecting rod 250 to rotate around the hinging point G between the third connecting rod 250 and the handle seat 260 through the hinging point C between the pressing rod 240 and the third connecting rod 250 to enter a ready-to-unlock state in the direction indicated by an arrow M in the figure, and at this time, the position of the handle seat 260 is still kept at the initial position due to the rotation of the gear 271 in the damping mechanism 270 on the sector gear 222. In addition, due to the damping action of the damping mechanism 270, the unlocking handle 210 is slow and gentle from the initial state to the ready-to-unlock state, so that the occupant can operate the unlocking handle 210 to perform the unlocking operation.

Referring to fig. 23c and 24c, when the seat back needs to be unlocked, the upward unlocking force F4 applied by the latch 111 of the unlocking handle 110 drives the unlocking handle 210 to turn upward continuously in the direction of arrow K. The unlock handle 210 which continues to turn upwards drives the handle base 260 to turn around the hinging point H between the handle base 260 and the base 100 according to an arrow N shown in the figure through the hinging point E of the first connecting rod 220 and the handle base 260, the hinging point B of the second connecting rod 230 and the handle base 260, the hinging point F of the second connecting rod 230 and the handle base 260. During the overturning process of the handle seat 260 around the hinging point H according to the arrow N shown in the figure, the unlocking cable is pulled by the unlocking cable connecting lug 262d to unlock. During the unlocking process, the pair of torsion springs 420 tighten to store energy.

Referring to fig. 23d and 24d, after unlocking is completed, the grip portion 111 of the unlocking handle 110 is released, and the handle base 260 is driven to turn around the hinge point H between the handle base 260 and the base 100 to a ready-to-unlock position by the releasing force of the pair of torsion springs 420 according to an arrow P shown in the drawing. The handle seat 260 is turned around the hinging point H between the handle seat 260 and the base 100 to the unlocking preparation position according to an arrow P shown in the figure, and under the action of the restoring force of the tension spring 280, the hinging point E of the first connecting rod 220 and the handle seat 260, the hinging point F of the second connecting rod 230 and the handle seat 260 drive the first connecting rod 220 and the second connecting rod 230 to return to the unlocking preparation position, and meanwhile, the unlocking handle 110 drives the compression rod 240 to return to the unlocking preparation position. The pressing rod 240 drives the third connecting rod 250 to return to the ready unlocking position through a hinging point C between the pressing rod 240 and the third connecting rod 250.

Referring to fig. 23e and 24e, when the unlocking handle 210 is in the ready-to-unlock state, the occupant does not perform the unlocking operation, and a preset time elapses, the force F3 of the tension spring 280 acting on the hinge point D between the first link 220 and the compression lever 240 by the releasing force of the tension spring 280 will pull the unlocking handle 210 back to the initial state through the hinge point D between the first link 220 and the compression lever 240, and simultaneously pull the compression lever 240 back to the initial state through the hinge point D between the first link 220 and the compression lever 240, so that the unlocking handle 210 and the compression lever 240 can tightly cover the upper opening of the internal cavity 110 of the base 100, and at this time, the first link 220, the second link 230, the tension spring 280, the third link 250, the handle seat 260 and the damping mechanism 270 are also synchronized back to the initial state. The pair of receiving chamber walls 261a, 261b in the handle socket 260 are in contact with the limit ledges 112b and 114b at the bottom of the base side walls 112 and 114, and are restrained by the limit ledges 112b and 114b at the bottom of the base side walls 112 and 114.

Referring to fig. 25, the enclosed unlocking handle of the present invention may be used for easy access unlocking, but may also be mounted to the center armrest 500 for unlocking the center armrest 500.

Claims

1. A closed-type unlocking handle comprising a base and a handle assembly installed in an internal cavity of the base, wherein the base is installed on a seat frame, the handle assembly comprising:

an unlocking handle;

a pressing rod hinged in the first mounting notch;

2. The sealed unlocking handle according to claim 1, wherein a second mounting notch is formed in the unlocking handle, and the face cover part of the pressing rod is embedded into the second mounting notch; the outer surface of the face cover portion is flush with the outer surface of the unlocking handle.

3. The sealed unlocking handle according to claim 2, wherein the first connecting rod and the second connecting rod are hinged on the inner surface of the unlocking handle facing the direction of the inner cavity of the base, and the inner surface of the unlocking handle is opposite to the outer surface of the unlocking handle; the hinging point between the pressure bar and the first connecting rod and the hinging point between the pressure bar and the third connecting rod are positioned on the inner surface of the pressure bar facing the direction of the inner cavity of the base, and the outer surface of the pressure bar and the inner surface of the pressure bar are two surfaces opposite to each other.

4. A closed-type unlocking handle according to claim 3, wherein a catch portion is provided on an inner surface of the unlocking handle, and the catch portion and the second mounting notch are provided on both ends of the unlocking handle.

5. The sealed unlocking handle according to claim 4, wherein the handle portion of the unlocking handle has a first inclined surface which is matched with a side seat wall of the base, a second inclined surface is arranged on the inner side of the top of the side seat wall of the base, when the unlocking handle is in a locked state, the unlocking handle completely covers the upper opening of the inner cavity of the base, and the first inclined surface is in contact with the second inclined surface.

6. The sealed unlocking handle according to claim 5, wherein the hinge point between the first link and the unlocking handle, the hinge point between the first link and the pressing rod, and the hinge point between the first link and the handle base are positioned on a straight line, and the hinge point between the first link and the pressing rod is positioned between the hinge point between the first link and the unlocking handle and the hinge point between the first link and the handle base.

7. The sealed unlocking handle according to claim 6, wherein a hinge point between the second link and the unlocking handle and a hinge point between the second link and the handle base are separately provided at both ends of the second link.

8. The sealed unlocking handle according to claim 7, wherein the hinge point between the pressing rod and the third connecting rod and the hinge point between the pressing rod and the first connecting rod are positioned on a diagonal line forming an included angle with the outer surface of the pressing rod.

9. The sealed unlocking handle according to claim 8, wherein the hinging points between the handle base and the base, the hinging points between the handle base and the first connecting rod, the hinging points between the handle base and the second connecting rod, the hinging points between the handle base and the third connecting rod and the connection points between the handle base and the unlocking inhaul cable are distributed in a non-linear mode.

10. A closed-type unlocking handle according to claim 9, wherein the first link, the second link, the third link, the pressing bar are accommodated in the handle holder.

11. A closed-type unlocking handle according to claim 10, wherein a first accommodation chamber and a second accommodation chamber which are communicated with each other are provided in the handle holder, the first link, the second link, and a part of the pressing lever are accommodated in the first accommodation chamber, and the other part of the pressing lever, a sector gear in the first link, and the third link are accommodated in the second accommodation chamber.

12. A closed-type unlocking handle according to claim 11, wherein a damping mechanism accommodating chamber is provided on a side wall of the second accommodating chamber, the damping mechanism is accommodated in the damping mechanism accommodating chamber and a gear in the damping mechanism extends into the second accommodating chamber.

13. The sealed unlocking handle according to claim 12, wherein the third link is arc-shaped, and the spring is a tension spring.

14. The sealed unlocking handle according to claim 13, wherein the length of the tension spring in the initial state of the unlocking handle is longer than the original length of the tension spring but smaller than the corresponding length of the tension spring in the unlocked state of the unlocking handle.

15. The sealed unlocking handle according to claim 14, wherein the distance between the handle portion of the unlocking handle and the hinge point between the handle base and the base is more than 1.5 times the distance between the hinge point between the handle base and the connecting point between the handle base and the unlocking cable.

16. A closed-type unlocking handle according to any one of claims 1 to 15, wherein the closed-type unlocking handle is adapted for easy access unlocking or unlocking of a central armrest.