CN114801933B - Seat electric headrest - Google Patents
Seat electric headrest Download PDFInfo
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- CN114801933B CN114801933B CN202210514142.4A CN202210514142A CN114801933B CN 114801933 B CN114801933 B CN 114801933B CN 202210514142 A CN202210514142 A CN 202210514142A CN 114801933 B CN114801933 B CN 114801933B
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- headrest
- motor mounting
- connecting rod
- side wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/80—Head-rests
- B60N2/806—Head-rests movable or adjustable
- B60N2/865—Head-rests movable or adjustable providing a fore-and-aft movement with respect to the occupant's head
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
The invention discloses a seat electric headrest, which comprises a locking rod and a headrest part, wherein the lower end part of the locking rod is fixed on the upper side of a seat back, and the headrest part is arranged at the upper end part of the locking rod; the headrest portion includes: the motor is arranged on the locking rod and outputs power through a screw rod; the sliding block is internally provided with a nut meshed with the screw rod; and the motor drives the headrest supporting part in the headrest part to move back and forth through the four-bar mechanism by virtue of a nut meshed with the screw rod and a slide block connected with the nut into a whole. The invention uses the motor to drive the headrest supporting part in the headrest to move back and forth through the adjusting mechanism combining the slide block and the four-bar mechanism, thereby achieving the purpose of electrically adjusting the seat headrest through lower cost. The operation method is simple, the occupied space is small, the assembly is simple, the adjusting range is large, and the impact strength is higher.
Description
The invention is a divisional application with the application number of 2021109879847 and the name of the invention being 'a seat electric headrest'.
Technical Field
The invention relates to the field of automobile seats, in particular to an electric headrest of a seat.
Background
Most of the front-back adjusting headrest core structures used in the existing market are manually adjusted, and along with the increasing use experience requirements of users, the manual headrest can not meet the requirements of the users gradually.
On traditional high-end motorcycle type, the regulatory function of electronic headrest is realized through motor, reduction gear cooperation four-bar linkage, but the electronic headrest structure of this kind of structure is complicated, and is with high costs, is not suitable for consumption level's vehicle to use.
In an electric headrest device of an electric system, japanese patent laid-open publication No. KR2006-0134430 discloses an electric headrest device in which a screw rod connected to a headrest is driven by a motor to move forward and backward, and the position of the headrest in the front-rear direction is adjusted at a time.
However, the structure disclosed in the above document has a problem that since the amount of movement in the front-rear direction of the headrest depends only on the length of the screw rod, the amount of movement in the front-rear direction of the headrest that can satisfy the feeling of the passenger cannot be secured, and the width in the front-rear direction of the headrest needs to be increased to secure a sufficient amount of movement, resulting in an increase in the volume of the headrest.
Therefore, the electric headrest device disclosed in the patent gazette KR10-1585850 automatically adjusts the vertical movement and the forward/backward movement of the headrest by a motor, maintains the forward/backward width of the headrest at a constant level or less by a pair of link members alternately arranged in an X-shape, and sufficiently secures the forward/backward movement amount of the headrest. However, the above-described structure is different from the front and rear direction driving part formed inside the headrest, and the up-down direction driving part for embodying the up-down direction movement of the headrest is fixed to the seat back frame, so that a space for providing the up-down direction driving part needs to be separately formed on the seat back, which causes an increase in the size of the seat back, thereby being disadvantageous for space use.
Further, the above structure has the following problems: the vertical direction driving portion moves the lock lever itself in the vertical direction and adjusts the vertical direction position of the headrest, and therefore, a relatively large load is generated as compared with the front-rear direction driving portion. Therefore, the vertical direction driving portion can be applied to a motor capable of bearing a larger load and a member having higher strength, resulting in an increase in production cost.
The electric headrest device disclosed in chinese patent application publication No. CN108688540a comprises a locking lever and a headrest portion, wherein a lower end portion of the locking lever is fixed to an upper side of a seat back, and the headrest portion is disposed at an upper end portion of the locking lever; the headrest portion includes a cover member, a movable plate, a cover bracket, an upper bracket, a lower bracket, a first driving portion and a second driving portion, the cover member, the movable plate, the cover bracket, the upper bracket, the lower bracket, the first driving portion and the second driving portion being formed inside the cover member; the cover part forms the external surface of the headrest part, and makes the locking rod penetrate and extend, the movable plate is supported in the cover part in a mode of moving in the vertical direction and the front-back direction, the cover bracket is arranged behind the movable plate and fixed on the locking rod, the lower bracket is fixed at the lower end of the cover bracket, the upper bracket is arranged between the movable plate and the cover bracket, and is connected with the lower bracket in a mode of moving relatively through a connecting part; the first driving part is formed on the upper bracket for moving the movable plate in the vertical direction, and the second driving part is formed on the lower bracket for moving the movable plate and the upper bracket in the front-back direction. In this patent, the second sliding section of the second driving section is driven by a double link mechanism including a pair of link arms or a pair of link rods to move the movable plate and the upper bracket in the front-rear direction.
The patent product disclosed above mainly drives the sliding block through the motor, the sliding block is connected with a three-link mechanism, wherein one vertex in the three-link mechanism is fixed, and one vertex drives the four-link, and the whole structure relates to a large number of parts, so that the transmission efficiency is low.
Disclosure of Invention
In order to achieve the above object, the present invention provides a seat headrest including a lock lever and a headrest portion, wherein a lower end portion of the lock lever is fixed to an upper side of a seat back, and the headrest portion is mounted on an upper end portion of the lock lever; characterized in that, the headrest portion includes:
the motor is arranged on the locking rod and outputs power through a screw rod;
the sliding block is internally provided with a nut meshed with the screw rod;
and the motor drives the headrest supporting part in the headrest part to move back and forth through the four-bar linkage by virtue of a nut meshed with the screw rod and a slide block connected with the nut into a whole.
In a preferred embodiment of the present invention, the four-bar linkage includes:
a base serving as a first link in the four-bar linkage, the base being mounted on the locking lever, the motor being mounted on the base;
a linkage plate serving as a second link in the four-link mechanism, on which a headrest support member in the headrest portion is mounted;
the front connecting rod serving as a third connecting rod in the four-bar mechanism and the rear connecting rod serving as a fourth connecting rod in the four-bar mechanism are provided with a long groove, one end of the front connecting rod and one end of the rear connecting rod are hinged to the base through a front lower moving shaft and a rear lower moving shaft respectively, the other end of the front connecting rod and the other end of the rear connecting rod are hinged to the linkage plate through a front upper moving shaft and a rear upper moving shaft respectively, and the sliding block is arranged in the long groove of the rear connecting rod in a sliding mode.
In a preferred embodiment of the present invention, the two front links and the two rear links are symmetrically disposed on both left and right sides in the axial direction of the screw shaft, the slider is disposed between the two rear links, two sliding portions are symmetrically disposed on the slider about the axis of the nut, and each sliding portion is slidably fitted in the elongated groove of one rear link.
In a preferred embodiment of the invention, one ends of the two front connecting rods are connected through the front cross arm to form a U-shaped structure; one ends of the two rear connecting rods are connected through the rear cross arm to form a U-shaped structure.
In a preferred embodiment of the present invention, the base has a base top wall, a base rear wall, a base left side wall and a base right side wall which are connected with each other, the base top wall, the base rear wall, the base left side wall and the base right side wall enclose a space, the motor, the screw rod, the slider, the two front connecting rods, the two rear connecting rods and the linkage plate are arranged in the space, wherein one ends of the two front connecting rods are respectively hinged on the base left side wall and the base right side wall through a front lower moving shaft, and one ends of the two rear connecting rods are respectively hinged on the base left side wall and the base right side wall through a rear lower moving shaft; the linkage plate extends out of and retracts into the opening in the front side of the base.
In a preferred embodiment of the invention, the linkage plate is provided with a linkage plate front wall, a linkage plate left side wall and a linkage plate right side wall which are connected with each other, the headrest supporting component in the headrest part is installed on the linkage plate front wall, the linkage plate left side wall and the linkage plate right side wall are inserted into the space and are respectively positioned at the inner sides of the base left side wall and the base right side wall, and the other ends of the two front connecting rods are respectively hinged at the linkage plate left side wall and the linkage plate right side wall through a front upper moving shaft; the other ends of the two rear connecting rods are respectively hinged on the left side wall of the linkage plate and the right side wall of the linkage plate through a rear upper moving shaft.
In a preferred embodiment of the present invention, the locking lever is divided into a left locking lever and a right locking lever, and the base left and right sidewalls are anchored to upper end portions of the left and right locking levers, respectively, by rivets so that the headrest portion is mounted on the upper end portions of the locking levers.
In a preferred embodiment of the present invention, a friction seat is respectively installed on the upper end portions of the left locking rod and the right locking rod, and a fixed seat is respectively installed on the left side wall and the right side wall of the base, and the fixed seat encloses the corresponding friction seat and is in friction contact with the friction seat.
In a preferred embodiment of the present invention, each fixing seat is provided with at least one limiting groove, each friction seat is provided with a limiting pin, and the limiting pin is inserted into the corresponding limiting groove to limit the turning angle of the headrest portion through the cooperation between the limiting groove and the limiting pin.
In a preferred embodiment of the present invention, the four-bar linkage includes:
the motor is arranged on the motor mounting plate and overturns along with the motor mounting plate;
a front moving plate serving as a second link in the four-link mechanism, on which a headrest support member in the headrest portion is mounted;
the front connecting rod is used as a third connecting rod in the four-bar mechanism, one end of the front connecting rod is hinged to the motor mounting plate through a front moving shaft, and the other end of the front connecting rod is hinged to the front moving plate through a rivet;
the rear connecting rod is used as a fourth connecting rod in the four-bar mechanism, one end of the rear connecting rod is hinged to the fixing plate through a rivet, and the other end of the rear connecting rod is hinged to the front moving plate through a rear moving shaft; the sliding block is fixedly connected with the rear connecting rod.
In a preferred embodiment of the present invention, the fixing plate has a fixing plate bottom wall and a fixing plate left side wall, which are connected to each other, and a fixing plate right side wall, the lower surface of the fixing plate bottom wall is welded to the upper end of the locking rod, and a pair of motor mounting plate hinge lugs is fixed on the upper surface of the fixing plate bottom wall; the utility model discloses a motor mounting panel, including motor mounting panel, fixed plate, preceding moving axis, motor mounting panel, preceding connecting rod, preceding moving axis, motor mounting panel left side wall, motor mounting panel right side wall, motor mounting panel have interconnect's motor mounting panel roof and motor mounting panel left side wall, motor mounting panel right side wall, preceding connecting rod is two, and two preceding connecting rod symmetries set up between fixed plate left side wall, fixed plate right side wall and paste with the medial surface of fixed plate left side wall and the medial surface of fixed plate right side wall respectively, preceding moving axis passes the one end of fixed plate left side wall, a preceding connecting rod, a motor mounting panel hinge ear, motor mounting panel left side wall, motor mounting panel hinge ear, the one end and the fixed plate right side wall of another preceding connecting rod in proper order to make two preceding connecting rod's one end articulate respectively on fixed plate left side wall, fixed plate right side wall, motor mounting panel hinges respectively on a pair of motor mounting panel hinge ear, the motor is installed on the motor roof mounting panel.
In a preferred embodiment of the invention, two rear connecting rods are connected through a support plate, a sliding block mounting notch is formed in the middle of the support plate, a sliding block mounting left side plate and a sliding block mounting right side plate are respectively arranged on two sides of the sliding block mounting notch, and shaft holes are respectively formed in the sliding block mounting left side plate and the sliding block mounting right side plate; the slider uses the nut axis is provided with left slider axle and right slider axle for central symmetry, the slider is installed in the slider installation breach, left side slider axle inserts in the shaft hole on the slider installation left side board, right side slider axle inserts in the shaft hole on the slider installation right side board.
In a preferred embodiment of the invention, the number of the two rear connecting rods is two, the two rear connecting rods are symmetrically arranged between the left side wall and the right side wall of the fixing plate and are respectively attached to the inner side surface of the left side wall of the fixing plate and the inner side surface of the right side wall of the fixing plate, and one end of each of the two rear connecting rods is respectively hinged to the left side wall and the right side wall of the fixing plate through a rivet.
In a preferred embodiment of the present invention, the front moving plate has a front moving plate front side plate and a front moving plate left side plate which are connected to each other, the front moving plate right side plate, the headrest support member in the headrest portion is mounted on the front moving plate front side plate, the other ends of the two front links and the other ends of the two rear links are respectively inserted into the inner sides of the front moving plate left side plate and the front moving plate right side plate, the front links are hinged to the front moving plate left side plate and the front moving plate right side plate by rivets, and the rear links are hinged to the front moving plate left side plate and the front moving plate right side plate by rear moving shafts which sequentially pass through one rear link, the front moving plate left side plate, the front moving plate right side plate and the other rear link.
The invention has the beneficial effects that:
according to the four-vehicle seat electric headrest provided by the invention, the headrest supporting part in the headrest is driven by the motor to move back and forth through the adjusting mechanism combining the slide block and the four-connecting-rod mechanism, so that the aim of electrically adjusting the seat headrest is fulfilled at lower cost. The operation method is simple, the occupied space is small, the assembly is simple, the adjusting range is large, and the impact strength is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a general conceptual diagram of the present invention.
Fig. 2 is an exploded view of a component of a first embodiment of the present invention.
Fig. 3 is a schematic view of a base structure according to a first embodiment of the present invention.
Fig. 4 is a schematic view of a first rear link structure according to the first embodiment of the present invention.
Fig. 5 is a schematic view showing the first rear link and the base in an assembled relationship according to the first embodiment of the present invention.
Fig. 6 is a schematic view of a first slider structure according to a first embodiment of the present invention.
Fig. 7 is a schematic view showing an assembly relationship of the first slider and the first rear link according to the first embodiment of the present invention.
Fig. 8 is a schematic view of a first front link structure according to the first embodiment of the present invention.
Fig. 9 is a schematic view showing an assembly relationship of the first front link and the base according to the first embodiment of the present invention.
Fig. 10 is a schematic structural view of a linkage plate according to a first embodiment of the present invention.
FIG. 11 is a schematic view of the assembly relationship between the linkage plate and the base according to the first embodiment of the present invention.
Fig. 12 is a structural sectional view of the first embodiment of the present invention.
Fig. 13 is a schematic view of the headrest portion according to the first embodiment of the present invention.
Fig. 14 is a schematic view showing a positional relationship between a lock lever and a headrest portion according to the first embodiment of the present invention.
Fig. 15 is a schematic view of the friction block structure according to the first embodiment of the present invention.
Fig. 16 is a schematic view showing the assembly of the friction block and the headrest portion according to the first embodiment of the present invention.
Fig. 17 is a schematic view of a fixed block structure according to the first embodiment of the present invention.
Fig. 18 is a schematic view showing the assembly of the fixing block and the headrest portion according to the first embodiment of the present invention.
Fig. 19 is a left side view of the first embodiment of the present invention.
Fig. 20 is a right side view of the first embodiment of the present invention.
Fig. 21 is a schematic view of the first rear link movement according to the first embodiment of the present invention.
Fig. 22 is a sectional view showing an initial state of movement of the first embodiment of the present invention.
Fig. 23 is a cross-sectional view showing a state of a motion process in the first embodiment of the present invention.
Fig. 24 is a sectional view of a final state of motion of the first embodiment of the present invention.
Fig. 25 is a schematic view of the movement principle in the initial state of the first embodiment of the present invention.
Fig. 26 is a schematic diagram showing the movement principle in the final state according to the first embodiment of the present invention.
Fig. 27 is an exploded view of parts of the second embodiment of the present invention.
Fig. 28 is a schematic structural view of a fixing plate according to a second embodiment of the present invention.
Fig. 29 is a schematic view of a second front link structure according to the second embodiment of the present invention.
Fig. 30 is a schematic structural view of a motor mounting plate according to a second embodiment of the present invention.
Fig. 31 is a schematic view showing an assembly relationship of the motor mounting plate, the second front link, and the fixing plate according to the second embodiment of the present invention.
Fig. 32 is a schematic structural view of a second rear link according to the second embodiment of the present invention.
Fig. 33 is a schematic view showing an assembled relationship of the second rear link, the second front link, and the fixed plate according to the second embodiment of the present invention.
Fig. 34 is a schematic structural view of a front sports board according to a second embodiment of the present invention.
Fig. 35 is a schematic view showing an assembly relationship of the front moving plate, the second rear link, the second front link, and the fixed plate according to the second embodiment of the present invention.
Fig. 36 is a schematic structural view of a second slider according to a second embodiment of the present invention.
Fig. 37 is a schematic view of a motor structure according to a second embodiment of the present invention.
Fig. 38 is a rear side view of the second embodiment of the present invention.
Fig. 39 is a right side enlarged view of the second embodiment of the present invention.
Fig. 40 is an enlarged left side view of the second embodiment of the present invention.
Fig. 41 is an enlarged front side view of the second embodiment of the present invention.
Fig. 42 is a sectional view of the second embodiment of the present invention.
Fig. 43 is a schematic view showing the movement of the second rear link according to the second embodiment of the present invention.
Fig. 44 is a sectional view showing an initial state of movement of the second embodiment of the present invention.
Fig. 45 is a sectional view showing a state of a motion process in the second embodiment of the present invention.
Fig. 46 is a sectional view showing a final motion state of the second embodiment of the present invention.
Fig. 47 is a schematic view of the movement principle in the initial state of the second embodiment of the present invention.
Fig. 48 is a schematic view of the movement principle in the final state of the second embodiment of the present invention.
Detailed Description
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, the longitudinal direction (X direction)", "lateral direction (Y direction)", "vertical direction (Z direction)" is a spatial coordinate system term in the automotive field, and is a term of art well known to those skilled in the art, and the above description is for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, a seat headrest mainly includes a stay rod 100, and a headrest portion 200 disposed above the stay rod 100. The headrest portion 200 is provided with a four-bar linkage 300, and a motor 201 and a first slider 202 provided on the four-bar linkage 300. The motor 201 pushes the first slider 202 through the lead screw 201a, thereby moving the four-bar linkage 300.
One embodiment of the invention is as follows:
referring to fig. 2, the headrest portion 200 is composed of a base 331 disposed at the outermost layer, a first rear link 305 disposed in the base 331, a linkage plate 321, a first front link 301, a first slider 202, and a motor 201. The first rear connecting rod 305, the linkage plate 321 and the first front connecting rod 301 are assembled in the base 331 through the rear upper moving shaft 313, the rear lower moving shaft 314, the front upper moving shaft 311 and the front lower moving shaft 312; the motor 201 is disposed behind the first rear link 305, and pushes the headrest portion 200 to extend forward by driving the first slider 202 disposed on the first rear link 305. The lock lever 100 is composed of a left lock lever 100b and a right lock lever 100a, and the left lock lever 100b and the right lock lever 100a are fixed to both sides of the headrest portion 200 by a movable rivet and extend downward, respectively. Friction seats 204 and fixed seats 203 are respectively arranged on the two locking rods, so that the locking rod 100 rotates around the headrest portion 200 in a controllable manner.
Referring to fig. 3 to 9, the base 331 is an approximately square housing-shaped member, and is composed of a base top wall 331a provided at the top, a base rear wall 331b provided at the rear, a base left wall 331c provided at the left side, and a base right wall 331d provided at the right side. A long groove 305b is formed on a side portion of the first rear link 305. A small hole is formed in the front side surface and the rear side surface of the first sliding block 202 in a penetrating manner, and a first nut 202a is arranged in the small hole; the first slider 202 has sliding portions 202b on both sides thereof, and the positions of the sliding portions 202b are symmetrical with respect to the axis of the first nut 202 a. The sliding portions 202b are respectively and correspondingly fitted in the elongated grooves 305b, so that the first slider 202 is movably fixed to the first rear link 305 with its movable stroke limited by the elongated grooves 305b. The lower portions of the two first rear links 305 are connected by a first rear cross arm 305a, and the lower portions of the two first front links 301 are connected by a first front cross arm 301a, both forming a U-shaped structure. The lower part of the first rear link 305 is fixed to the rear lower part of the base 331 through a rear lower moving shaft 314, and the first rear link 305 is fixed to be rotatable around the rear lower moving shaft 314; the lower portion of the first front link 301 is fixed to the front lower portion of the base 331 by a front lower moving shaft 312.
Referring to fig. 10 to fig. 13, the linkage plate 321 is a mask-shaped component, and is composed of a front linkage plate wall 321a arranged at the front, a left linkage plate sidewall 321b arranged at the left side, and a right linkage plate sidewall 321c arranged at the right side. Linkage plate left side wall 321b and linkage plate right side wall 321c are inserted inside base left side wall 331c and base right side wall 331 d. The upper front parts of the linkage plate left side wall 321b and the linkage plate right side wall 321c are fixed with the upper end of the first front connecting rod 301 through a front upper moving shaft 311, and the upper parts Fang Houbu are fixed with the upper end of the first rear connecting rod 305 through a rear upper moving shaft 313. The first rear link 305 and the first front link 301 are both rotatable about their upper fixed points. The whole four-bar linkage 300 is mainly formed by using the first front link 301 as the third link, the first rear link 305 as the fourth link, the linkage plate 321 as the second link and the base 331 as the first link. The motor 201 is arranged between the first rear connecting rod 305 and the base rear wall 331b, a screw 201a protruding forwards is arranged on the motor 201, and the screw 201a is engaged and connected with the first nut 202 a. So that the motor 201 rotates by driving the lead screw 201a, thereby changing the orientation of the first nut 202a on the lead screw 201a, and further driving the four-bar linkage 300 to move.
Referring to fig. 14 to 18, two fixing bases 203 are respectively disposed outside the left locking rod 100b and the right locking rod 100a, and are fixed on the left wall 331c and the right wall 331d of the base by a snap-fit manner, and a friction base 204 is further clamped between the fixing base 203 and the locking rod 100. The friction seat 204 is provided with a limit pin 204a; similarly, the fixing seat 203 is also provided with a limiting groove 203a, and the limiting pin 204a and the limiting groove 203a are structurally matched with each other, so that the rotation angle of the headrest portion 200 relative to the locking lever 100 is limited.
Referring to fig. 19 to fig. 26 in combination, when the motor 201 drives the screw 201a to start rotating, the first slider 202 generates a forward movement trend under the principle of screw movement, and pushes the first rear link 305 to rotate forward around the rear downward movement axis 314 (the arrow in fig. 21 indicates the movement trend of the first rear link 305 at this time), and the first rear link 305 rotates and simultaneously drives the linkage plate 321 to extend forward and the first front link 301 to move around the front downward movement axis 312. Referring also to fig. 10, a headrest support (not shown) mounted on the front wall 321a of the linkage plate moves forward along with the linkage plate 321, thereby achieving the purpose of extending the seat headrest in the X direction.
Another embodiment of the present invention is:
referring to fig. 27, the headrest portion 200 is composed of an upper front movement plate 371, a rear second rear link 351, a lower fixing plate 381, and a front second front link 355. The second front link 355 and the second rear link 351 are hingedly connected to the fixed plate 381 and the front moving plate 371. The motor 201 is disposed on the fixed plate 381 via the motor mounting plate 253. The motor 201 pushes the front moving plate 371 to move forward by cooperating with the second slider 252 provided on the second rear link 351.
The second locking lever 101 is fixed below the fixed plate 381 by welding.
Referring to fig. 28 to 31, the fixing plate 381 is composed of a bottom fixing plate bottom wall 381a, a fixing plate left side wall 381b disposed on the left side of the fixing plate bottom wall 381a, and a fixing plate right side wall 381c disposed on the right side. A pair of upturned motor mounting plate hinge ears 381d is also provided on the fixed plate bottom wall 381 a. The motor mounting plate 353 is composed of a motor mounting plate left side wall 353b, a motor mounting plate right side wall 353c, and a motor mounting plate top wall 353a provided therebetween and connected to each other. The motor mounting plate 253 and the pair of second front links 355 are fixed to the fixed plate 381 by the second front moving shaft 361. The second front moving shaft 361 sequentially passes through the fixed plate left side wall 381b, a second front connecting rod 355, a motor mounting plate hinge lug 381d, the motor mounting plate left side wall 353b, the motor mounting plate right side wall 353c, another motor mounting plate hinge lug 381d, another second front connecting rod 355 and the fixed plate right side wall 381c. So that the two second front links 355 are symmetrically disposed between the fixed plate left side wall 381b and the fixed plate right side wall 381c, and closely attached to the inner side surfaces of the fixed plate left side wall 381b and the fixed plate right side wall 381c. After assembly, the second front link 355 and the motor mounting plate 263 are both rotatable about the second front rotating shaft 361.
Referring to fig. 32 to 35, a holder plate 351a is provided between the pair of second rear links 351 to serve as a connection for keeping the second rear links 351 synchronized during movement. The bracket plate 351a is provided with a slide block mounting left side plate 351c and a slide block mounting right side plate 351d which are turned up forwards; the slider mounting left side plate 351c and the slider mounting right side plate 351d are both provided with a pair of shaft holes 351e, the lateral positions of which are coaxial. The front moving plate 371 is composed of a front moving plate front side plate 371a, a left front moving plate left side plate 371b, and a right front moving plate right side plate 371c, which are connected to each other. The pair of second rear links 351 are fixed to the fixed plate 381 at their lower ends by a movable caulking, are positioned behind the second front links 355, and have end portions respectively in close contact with inner surfaces of the fixed plate right side wall 381c and the fixed plate left side wall 381 b. The rear end of the front moving plate 371 is hinged to the upper end of the second rear link 351 by a second rear moving shaft 362, and the front end thereof is fixed to the upper end of the second front link 355 by a movable rivet. Finally, the fixed plate 381, the second front link 355, the second rear link 351, and the front moving plate 371 collectively constitute the four-link mechanism 300, in which the fixed plate 381 serves as a first link, the front moving plate 371 serves as a second link, the second front link 355 serves as a third link, and the second rear link 351 serves as a fourth link.
Referring to fig. 35 to 41, the second slider 252 is composed of a second nut 252a disposed at the center and a left slider shaft 252b and a right slider shaft 252c disposed at both sides of the second slider 252 with the second nut 252a centrosymmetrically. The second nut 252a is disposed in a through hole passing through the second slider 252. The left slider shaft 252b and the right slider shaft 252c are inserted into the shaft holes 351e of the slider-mounted left side plate 351c and the slider-mounted right side plate 351d, respectively, and the second slider 252 can freely rotate about the slider shafts after assembly. The motor 201 is fixed to the motor mounting plate 253 by a fastener.
Referring to fig. 42 to 48, when the motor 201 drives the screw 201a to start rotating, the second slider 252 generates a movement trend approaching to the motor 201 under the principle of screw movement, and as the distance between the two gradually decreases, the motor 201 and the motor mounting plate 253 rotate along the second front moving shaft 361, and the second slider 252 also rotates in cooperation therewith, synchronously driving the second rear connecting rod 351 to rotate along the lower fixed point thereof (the arrow in fig. 43 is the movement trend of the second rear connecting rod 351 at this time). So that the front moving plate 371 is pushed by the second rear link 351 to move forward, and the second front link 355 is rotated about the second front moving shaft 361 by the front moving plate 371. In the entire movement process, the front movement plate 371 continues to move forward in the entire movement process, and a headrest support (not shown) mounted on the front side plate 371a of the front movement plate moves forward together with the front movement plate 371, thereby achieving the purpose that the seat headrest protrudes in the X direction.
Claims (5)
1. A seat electric headrest comprises a locking rod and a headrest part, wherein the lower end part of the locking rod is fixed on the upper side of a seat back, and the headrest part is arranged at the upper end part of the locking rod; characterized in that, the headrest portion includes:
the motor is arranged on the locking rod and outputs power through a screw rod;
the sliding block is internally provided with a nut meshed with the screw rod;
a four-bar linkage mechanism, wherein the motor drives the headrest supporting component in the headrest part to move back and forth through a nut meshed with a screw rod and a slide block connected with the nut into a whole through the four-bar linkage mechanism;
the four-bar linkage includes:
the motor is arranged on the motor mounting plate and overturns along with the motor mounting plate;
a front moving plate serving as a second link in the four-link mechanism, on which a headrest support member in the headrest portion is mounted;
a front connecting rod serving as a third connecting rod in the four-bar mechanism, wherein one end of the front connecting rod is hinged to the motor mounting plate, and the other end of the front connecting rod is hinged to the front movement plate;
a rear connecting rod serving as a fourth connecting rod in the four-bar mechanism, wherein one end of the rear connecting rod is hinged to the motor mounting plate, and the other end of the rear connecting rod is hinged to the front moving plate; the sliding block is fixedly connected with the rear connecting rod; the rear connecting rods are two and are connected through a support plate, a sliding block mounting notch is formed in the middle of the support plate, a sliding block mounting left side plate and a sliding block mounting right side plate are arranged on two sides of the sliding block mounting notch respectively, the sliding block is mounted in the sliding block mounting notch, the left side and the right side of the sliding block are hinged to the sliding block mounting left side plate and the sliding block mounting right side plate respectively.
2. The seat headrest according to claim 1, wherein the fixing plate has a bottom wall and left and right side walls connected to each other, the bottom wall has a lower surface welded to the upper end of the locking rod, and a pair of motor mounting plate hinge lugs is fixed to the upper surface of the bottom wall; the utility model discloses a motor mounting panel, including motor mounting panel, fixed plate, preceding movable shaft, motor mounting panel right flank, motor mounting panel has interconnect's motor mounting panel roof and motor mounting panel left side wall, motor mounting panel right side wall, preceding connecting rod is two, two preceding connecting rod symmetries set up between fixed plate left side wall, fixed plate right flank and paste with the medial surface of fixed plate left side wall and the medial surface of fixed plate right flank respectively, preceding movable shaft passes fixed plate left side wall in proper order, the one end of a preceding connecting rod, the articulated ear of a motor mounting panel, motor mounting panel left side wall, motor mounting panel right flank, the one end and the fixed plate right flank of another preceding connecting rod to make two preceding connecting rod's one end articulate respectively on fixed plate left side wall, fixed plate right flank, motor mounting panel left side wall, motor mounting panel right flank articulate respectively on a pair of motor mounting panel.
3. The electric headrest for seats according to claim 1 or 2, wherein a shaft hole is respectively formed on the left side plate for mounting the slider and the right side plate for mounting the slider; the slider is provided with a left slider shaft and a right slider shaft in a central symmetry manner by taking the axis of the nut as a center, the left slider shaft is inserted into a shaft hole in the left side plate of the slider installation, and the right slider shaft is inserted into a shaft hole in the right side plate of the slider installation.
4. The seat headrest according to claim 3, wherein two rear links are symmetrically disposed between the left and right side walls of the stationary plate and respectively attached to the inner surface of the left side wall of the stationary plate and the inner surface of the right side wall of the stationary plate, and one end of each of the two rear links is hinged to the left and right side walls of the stationary plate by a rivet.
5. A seat headrest according to claim 3, wherein said front motion plate has a front motion plate front side plate and a front motion plate left side plate which are connected to each other, a front motion plate right side plate, said headrest supporting means in said headrest portion is mounted on said front motion plate front side plate, the other ends of said two front links and the other ends of said two rear links are respectively inserted inside said front motion plate left side plate and said front motion plate right side plate, said front links are hinged to said front motion plate left side plate and said front motion plate right side plate by rivets, and said rear links are hinged to said front motion plate left side plate and said front motion plate right side plate by a rear moving shaft passing through one rear link, said front motion plate left side plate, said front motion plate right side plate and said other rear link in this order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514142.4A CN114801933B (en) | 2021-08-26 | 2021-08-26 | Seat electric headrest |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514142.4A CN114801933B (en) | 2021-08-26 | 2021-08-26 | Seat electric headrest |
| CN202110987984.7A CN113525205B (en) | 2021-08-26 | 2021-08-26 | Seat electric headrest |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110987984.7A Division CN113525205B (en) | 2021-08-26 | 2021-08-26 | Seat electric headrest |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114801933A CN114801933A (en) | 2022-07-29 |
| CN114801933B true CN114801933B (en) | 2023-04-07 |
Family
ID=78092124
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110987984.7A Active CN113525205B (en) | 2021-08-26 | 2021-08-26 | Seat electric headrest |
| CN202210514142.4A Active CN114801933B (en) | 2021-08-26 | 2021-08-26 | Seat electric headrest |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110987984.7A Active CN113525205B (en) | 2021-08-26 | 2021-08-26 | Seat electric headrest |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN113525205B (en) |
| WO (1) | WO2023024477A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113525205B (en) * | 2021-08-26 | 2022-08-19 | 延锋国际座椅系统有限公司 | Seat electric headrest |
| DE102022120969A1 (en) | 2022-08-19 | 2024-02-22 | Faurecia Autositze Gmbh | Adjusting device for a headrest of a vehicle seat and vehicle seat |
| DE102022122310A1 (en) * | 2022-09-02 | 2024-03-07 | Grammer Aktiengesellschaft | headrest |
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- 2021-08-26 CN CN202210514142.4A patent/CN114801933B/en active Active
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- 2022-03-08 WO PCT/CN2022/079669 patent/WO2023024477A1/en unknown
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| CN111873879A (en) * | 2020-08-29 | 2020-11-03 | 北京现工汽车部件有限公司 | Automobile headrest structure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023024477A1 (en) | 2023-03-02 |
| CN113525205B (en) | 2022-08-19 |
| CN113525205A (en) | 2021-10-22 |
| CN114801933A (en) | 2022-07-29 |
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