CN109720255B

CN109720255B - Manual regulation headrest

Info

Publication number: CN109720255B
Application number: CN201811592425.0A
Authority: CN
Inventors: 张帅; 陈静静; 朱敏; 李昊桦; 徐朝刚
Original assignee: Adient Engineering and IP GmbH
Current assignee: Yanfeng International Seating Systems Co Ltd
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2020-05-01
Anticipated expiration: 2038-12-20
Also published as: CN109720255A

Abstract

The invention relates to a manual adjustment headrest, wherein a first cover is slidably arranged on a fixing rod assembly, a locking assembly is rotatably connected to the first cover and is matched with the fixing rod assembly to lock the first cover in a locking position, an unlocking assembly is rotatably connected to the first cover and is matched with the locking assembly to unlock the first cover from the locking position, the fixing rod assembly is provided with a fixing tooth, the locking assembly is provided with a locking tooth, the tooth structure of the locking tooth is matched with the tooth socket structure of the fixing tooth, the tooth socket structure comprises a horizontal supporting surface and a lifting surface extending obliquely upwards from the horizontal supporting surface, the tooth structure of the locking tooth can automatically slide outwards from the tooth socket structure of the fixing tooth under the guiding of the lifting surface, and the tooth structure of the locking tooth is locked in a single direction under the action of the horizontal supporting surface. The fixing rod assembly and the locking assembly of the invention realize the unlocking of the upward adjustment and the unidirectional downward locking of the first cover through the engagement, and the downward adjustment can be realized only through the matching of the unlocking assembly.

Description

Manual regulation headrest

Technical Field

The present invention relates to automotive seats, and more particularly to a manually adjustable headrest.

Background

For greater passenger comfort, existing vehicle seats are typically equipped with an adjustable head restraint. In the prior art, the headrest can be a manual adjustment headrest, but the locking position is limited, so that the general gear spacing is large, and the comfort of use of passengers with different heights can be affected when the headrest is adjusted. In order to solve the problem, the headrest can be set to be an electric adjusting headrest, and stepless adjustment and locking are achieved. However, the use of an electrically adjustable headrest results in an increase in the weight and cost of the headrest.

Disclosure of Invention

In order to solve the problems that the gear spacing of the manual adjustment headrest is large and the cost of the electric adjustment headrest is high in the prior art, the invention aims to provide the manual adjustment headrest.

The invention discloses a manual adjusting headrest, which comprises a first cover, a fixed rod component, a locking component and an unlocking component, wherein the first cover is slidably mounted on the securing lever assembly, the locking assembly is rotatably coupled to the first cover and cooperates with the securing lever assembly to lock the first cover in the locked position, the unlocking assembly is rotatably coupled to the first cover and cooperates with the locking assembly to unlock the first cover from the locked position, the locking assembly is provided with locking teeth, the tooth structures of the locking teeth are matched with tooth groove structures of the fixing teeth, each tooth groove structure comprises a horizontal supporting surface and a lifting surface extending obliquely upwards from the horizontal supporting surface, the tooth structures of the locking teeth automatically slide outwards from the tooth groove structures of the fixing teeth under the guidance of the lifting surfaces, and the tooth structures of the locking teeth are locked in a single direction under the action of the horizontal supporting surfaces.

The medial surface of the bottom of locking tooth has the slant decurrent cantilever that leans on, and the unblock subassembly includes that the main part dish outwards extends from the main part dish, and the tip of keeping away from the main part dish of cantilever has the effect inclined plane, and the effect inclined plane with lean on the inclined plane contact in order to promote the locking tooth through the unblock subassembly.

The middle part of the bottom end of the locking tooth is provided with a waist-shaped hole, the tail end of the cantilever, which is far away from the main body disc, is provided with a convex pin, and the convex pin is inserted into the waist-shaped hole so as to pull the locking tooth through the unlocking assembly.

First shroud has the unlocking axle, and the unblock subassembly includes unblock piece and unblock torsional spring, and the unblock piece cover is established in order to be rotatable around the unblock axle in the unlocking epaxial, and the unblock torsional spring is installed between unblock piece and first shroud in order to provide rotatory drive power for the unblock piece.

One end of the unlocking torsion spring is connected and fixed to the unlocking piece through the mounting hole, and the other end of the unlocking torsion spring is connected and fixed to the first cover cap through the limiting groove.

The unlocking assembly further comprises an unlocking rod and an unlocking button, wherein the unlocking piece and the unlocking button are connected to two ends of the unlocking rod respectively, and the unlocking button is slidably mounted on the first cover.

The first cover has a locking shaft, and the tip of the locking tooth has a shaft hole into which the locking shaft is inserted so that the locking tooth is rotatable around the locking shaft.

The fixed rod assembly further comprises a fixed rod and a bushing, wherein the fixed tooth is fixedly mounted on the fixed rod, and the first cover cap is slidably mounted on the fixed rod through the bushing.

The first cover has a fixing rod slot through which the fixing rod passes and is installed through a bushing.

The manual adjustment headrest further comprises a second cover cap and a foaming piece, wherein the second cover cap is fixedly connected with the first cover cap, and the foaming piece is coated on the outer sides of the first cover cap and the second cover cap.

The fixing rod assembly and the locking assembly are matched in a tooth and tooth groove meshing mode, so that the first cover cap can be adjusted upwards and unlocked, can be locked downwards in a one-way mode and stays at any position, and can be adjusted downwards only through the matching of the unlocking assembly. Due to the adoption of the toothed plate meshing mode, the adjusting gears of the manual adjusting headrest are dense, infinite and nearly stepless adjustment can be realized, and the riding comfort of passengers is improved. In addition, the manual adjusting headrest has the advantages of simple structure and low cost.

Drawings

FIG. 1 is a perspective view of a manual adjustment headrest according to a preferred embodiment of the present invention;

FIG. 2A is a perspective view of a first cover of the manual adjustment headrest of FIG. 1;

fig. 2B is a schematic view along an arrow F of fig. 2A, showing the fixing rod inserted into the slot;

FIG. 3 is an exploded view of the fixed rod assembly of the manual adjustment headrest of FIG. 1;

FIG. 4 is an exploded view of the locking assembly of the manual adjustment headrest of FIG. 1;

FIG. 5 is an exploded view of the unlocking assembly of the manual adjustment headrest of FIG. 1;

FIG. 6 shows the unlocking torsion spring housed within the unlocking member;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6;

FIG. 8 is a schematic view of the manual adjustment headrest of FIG. 1 in an initial state;

FIG. 9 illustrates the locked and unlocked states of the manual adjustment headrest of FIG. 1;

fig. 10 shows the manual adjustment headrest of fig. 1 in a wrapped state.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a manual adjustment headrest according to a preferred embodiment of the present invention includes a first cover 1, a fixing rod assembly 2, a locking assembly 3, and an unlocking assembly 4, wherein the fixing rod assembly 2 is fixed to a vehicle body, the first cover 1 is slidably mounted on the fixing rod assembly 2 to slide up and down, the locking assembly 3 is rotatably coupled to the first cover 1 and cooperates with the fixing rod assembly 2 to lock the first cover 1 at a locking position, and the unlocking assembly 4 is rotatably coupled to the first cover 1 and cooperates with the locking assembly 3 to unlock the first cover 1 from the locking position and slides up and down.

As shown in fig. 2A to 2B, both sides of the first cover 1 have a first fixing rod notch 11a and a second fixing rod notch 11B symmetrically disposed, and the fixing rod assembly 2 is installed through the fixing rod notches 11a, 11B. Inside the

fixing rod slots

11a, 11b, the first cover 1 further has a first locking shaft 12a and a second locking shaft 12b which are symmetrically arranged, and the locking assembly 3 is sleeved on the

locking shafts

12a, 12b and can rotate. In the middle of the two

locking shafts

12a, 12b, the first cover 1 further has an unlocking shaft 13, and the unlocking member 4 is rotatably fitted over the unlocking shaft 13.

As shown in fig. 3, the fixing rod assembly 2 includes a fixing rod 21, a first fixing tooth 22a, a second fixing tooth 22b, a first bushing 23a, a second bushing 23b, a third bushing 23c and a fourth bushing 23d, wherein the

fixing teeth

22a, 22b are fixedly installed on the fixing rod 21, and the first cover 1 is slidably installed on the fixing rod 21 through the

bushings

23a, 23b, 23c, 23d, so that the first cover 1 can slide up and down on the fixing rod 21.

The fixing lever 21 is a U-shaped structure including a first leg 21a and a second leg 21b extending substantially in parallel. The inner side of the first leg 21a has a first recess, and the outer side of the first fixed tooth 22a has a first projection, and the first fixed tooth 22a can be fixed to the first leg 21a by the cooperation of the first projection and the first recess. The inner side of the second leg 21b has a second recess, and the outer side of the second fixed tooth 22b has a second projection, and the second fixed tooth 22b can be fixed on the second leg 21b by the cooperation of the second projection and the second recess.

The first bush 23a has a first catch, and the first lever notch 11a of the first cover 1 has a first catch groove 11a1 above the first lever notch 11a, and the first bush 23a can be fixed above the first lever notch 11a by the engagement of the first catch with the first catch, see fig. 2A. The second bush 23b has a second catch, and a second catch groove 11b1 is provided above the second rod slot 11b of the first cover 1, and the second bush 23b can be fixed above the second rod slot 11b by the engagement of the second catch and the second catch, see fig. 2A. The third bush 23c has a third catch, and a third catch groove 11a2 is provided below the first fixing lever notch 11a of the first cover 1, and the third bush 23c can be fixed and mounted below the first fixing lever notch 11a by the engagement of the third catch and the third catch groove, see fig. 2B. The fourth bush 23d has a fourth catch, and a fourth catch groove 11B2 is provided below the second rod slot 11B of the first cover 1, and the fourth bush 23d is fittingly fixed below the second rod slot 11B by the fourth catch and the fourth catch, see fig. 2B. In a specific installation process, the

bushes

23a, 23b are first installed on the

fixing rod slots

11a, 11b of the first cover 1 from above, then the

legs

21a, 21b of the fixing rod 21 are inserted into the

bushes

23a, 23b from above for installation, and finally the

bushes

23c, 23d are fitted over the

legs

21a, 21b and installed on the

fixing rod slots

11a, 11b of the first cover 1 from below for installation, so that the sliding installation of the first cover 1 on the fixing rod 21 is finally achieved.

As shown in fig. 4, the locking assembly 3 includes first and

second locking teeth

3a and 3b that are symmetrically arranged. The first locking tooth 3a is a bar-shaped structure having a first shaft hole 31a at a tip end thereof, and the first locking shaft 12A (see fig. 2A) of the first cover 1 is inserted into the first shaft hole 31a so that the first locking tooth 3a can rotate around the first locking shaft 12A. The bottom end of the first locking tooth 3a is wedge-shaped, and the inner side surface thereof has a first inclined abutment surface 32a which is inclined downward, and the end of the unlocking component 4 is in contact with the first inclined abutment surface 32a, so that the first locking tooth 3a can receive the outward pushing force of the unlocking component 4. The outer side of the bottom end of the first locking tooth 3a has a first tooth structure 33a, and a spline structure of the first fixing tooth 22a (see fig. 3) of the fixing lever assembly 2 is engaged with the first tooth structure 33 a. In addition, the middle of the bottom end of the first locking tooth 3a is provided with a first kidney-shaped hole 34a, and the end pin of the unlocking component 4 is inserted into the first kidney-shaped hole 34a to be matched, so that the first locking tooth 3a can receive the inward pulling force of the unlocking component 4. Similarly, the second locking tooth 3b is a bar-shaped structure having a second shaft hole 31b at the top end thereof, and the second locking shaft 12b (see fig. 2A) of the first cover 1 is inserted into the second shaft hole 31b so that the second locking tooth 3b can rotate around the second locking shaft 12 b. The bottom end of the second locking tooth 3b is in a wedge-shaped structure, the inner side surface of the second locking tooth is provided with a second inclined abutting surface 32b which is inclined downwards, and the tail end of the unlocking component 4 is contacted with the second inclined abutting surface 32b, so that the second locking tooth 3b can receive the outward pushing force of the unlocking component 4. The outer side surface of the bottom end of the second locking tooth 3b has a second tooth structure 33b, and a tooth groove structure of the second fixing tooth 22b (see fig. 3) of the fixing lever assembly 2 is engaged with the second tooth structure 33 b. In addition, the middle of the bottom end of the second locking tooth 3b is provided with a second kidney-shaped hole 34b, and the end pin of the unlocking component 4 is inserted into the second kidney-shaped hole 34b to be matched, so that the second locking tooth 3b can receive the inward pulling force of the unlocking component 4.

As shown in fig. 5, the unlocking assembly 4 includes an unlocking member 41, an unlocking torsion spring 42, an unlocking lever 43 and an unlocking button 44, wherein the unlocking member 41 is fitted over the unlocking shaft 13 (see fig. 2A) of the first cover 1 such that the unlocking member 41 can rotate around the unlocking shaft 13, the unlocking torsion spring 42 is installed between the unlocking member 41 and the first cover 1 to provide a rotational driving force for the unlocking member 41, both ends of the unlocking lever 43 are connected to the unlocking member 41 and the unlocking button 44, respectively, and the unlocking button 44 is movably installed on the first cover 1. Thus, by pressing the unlock button 44, the movement of the unlock lever 43 is driven and the rotation of the unlock piece 41 is carried out.

The unlocking member 41 includes a main body plate 411, a first cantilever 412 and a second cantilever 413, wherein the first cantilever 412 and the second cantilever 413 respectively extend outward from diametrically opposite positions of the main body plate 411. The second arm 413 has an unlocking lever connection hole 413a at a starting point, the first end 43a of the unlocking lever 43 is inserted into the unlocking lever connection hole 413a to be connected and fixed, and the second end 43b of the locking lever 43 is connected and fixed to the unlocking button 44. The ends of the first and

second cantilever arms

412, 413 remote from the body disc 411 have obliquely downward acting

slopes

41a, 41b, respectively, with which the abutting

slopes

32a, 32b (see fig. 4) of the locking

teeth

3a, 3b of the locking assembly 3 contact to push the locking

teeth

3a, 3b outward through the

cantilever arms

412, 413.

As shown in fig. 6, the back surface of the main body tray 411 has a receiving groove in which the unlocking torsion spring 42 is received, and the receiving groove has a mounting hole 411a, and as shown in fig. 7, one end 42a of the unlocking torsion spring 42 is inserted into the mounting hole 411a for fixing. On the other hand, the other end 42b (see fig. 5) of the unlocking torsion spring 42 is fixed to the first cover 1 through the stopper groove 14 (see fig. 8), whereby the first cover 1 can provide a rotational restoring force to the unlocking torsion spring 42 through the stopper groove 14. In addition, as shown in fig. 6, the ends of the first and

second cantilevers

412, 413 remote from the main body disk 411 respectively have protruding

pins

412a, 413a which are inserted into the respective kidney-shaped

holes

34a, 34b (see fig. 4) of the locking

teeth

3a, 3b of the locking assembly 3 to be engaged, so that the locking

teeth

3a, 3b are pulled inward by the protruding

pins

412a, 413 a.

The operation of the manual headrest of the present invention will be described in detail. As shown in fig. 8, in the initial state, the unlocking torsion spring 42 provides a counterclockwise rotational driving force to the unlocking piece 41 by abutment of the stopper groove 14 against the unlocking torsion spring 42, the first locking tooth 3a rotates clockwise around the first locking shaft 12a to engage with the first stationary teeth 22a by contact of the operation slopes 41a, 41b (see fig. 5) of the unlocking piece 41 with the

abutment slopes

32a, 32b (see fig. 4) of the locking

teeth

3a, 3b, and the second locking tooth 3b rotates counterclockwise around the second locking shaft 12b to engage with the second stationary teeth 22 b. Fig. 9 shows a partially enlarged view of the stationary teeth 22a, each tooth slot of which includes a horizontal support surface 2a and a rising surface 2b extending obliquely upward from the horizontal support surface 2a, the rising surface 2b being at an angle of approximately 30 degrees to the horizontal support surface 2 a.

Referring to fig. 8, when the first cover 1 is pushed upward by an external force, the locking

teeth

3a, 3b move upward, and the

tooth structures

33a, 33b of the locking

teeth

3a, 3b automatically slide out of the engaging tooth grooves of the fixed

teeth

22a, 22b by being guided by the rising surface 2b, and then engage with the next tooth groove again by the unlocking torsion spring 42.

When the external force pushes the first cover 1 to move downward, the locking

teeth

3a, 3b are supported by the horizontal support surface 2a (see fig. 9), and at the same time, since the unlocking torsion spring 42 provides a continuous force to push the locking

teeth

3a, 3b toward the fixed

teeth

22a, 22b, that is, the acting

slopes

41a, 41b (see fig. 5) of the unlocking piece 41 continuously push the abutting

slopes

32a, 32b (see fig. 4) of the locking

teeth

3a, 3b, maintaining the locking state of constant engagement. In this way, the upward adjustment of the first cover 1 is not locked, but the downward adjustment is one-way locked. It will be appreciated that the height of each gullet can be adjusted as desired between 0-2mm, so that the first cover 1 can be adjusted upwards nearly steplessly and the first cover 1 can stay in any desired position by unidirectional locking.

When it is required to release the locking state, the external force pushes the unlocking button 44 leftward to rotate the unlocking member 41 clockwise around the unlocking shaft 13 by the unlocking lever 43, the first locking tooth 3a is pulled by the first protrusion pin 412a (see fig. 6) to rotate counterclockwise around the first locking shaft 12a to be disengaged from the spline structure of the first fixing tooth 22a, and the second locking tooth 3b is pulled by the second protrusion pin 413a (see fig. 6) to rotate clockwise around the second locking shaft 12b to be disengaged from the spline structure of the second fixing tooth 22b, thereby contacting the locking state. In this way, the first cover 1 can be adjusted downwards.

It should be understood that the first cover 1 is further provided with a limiting structure to limit the up-and-down adjustment range of the first cover 1.

As shown in fig. 10, the manual headrest according to a preferred embodiment of the present invention further includes a second cover 5 and a foaming member 6, wherein the second cover 5 may be fixedly coupled to the first cover 1 by welding so as to sandwich the dead lever assembly 2, the locking assembly 3 and the unlocking assembly 4 between the first cover 1 and the second cover 2 for protection, and further, the foaming member 6 covers the outside of the first cover 1 and the second cover 5 so as to provide a comfortable resting surface for passengers.

The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.

Claims

1. A manually adjustable headrest comprising a first cover (1), a fixed rod assembly (2), a locking assembly (3) and an unlocking assembly (4), wherein the first cover (1) is slidably mounted on the fixed rod assembly (2), characterized in that the locking assembly (3) is rotatably connected to the first cover (1) and cooperates with the fixed rod assembly (2) to lock the first cover (1) in a locked position, the unlocking assembly (4) is rotatably connected to the first cover (1) and cooperates with the locking assembly (3) to unlock the first cover (1) from the locked position, wherein the fixed rod assembly (2) has fixed teeth (22a, 22b), the locking assembly (3) has locking teeth (3a, 3b), the tooth formations (33a, 33b) of the locking teeth (3a, 3b) and the fixed teeth (22 a), 22b) the tooth space structure comprises a horizontal supporting surface (2a) and a lifting surface (2b) extending obliquely upwards from the horizontal supporting surface (2a), the tooth structures (33a, 33b) of the locking teeth (3a, 3b) automatically slide outwards from the tooth space structures of the fixed teeth (22a, 22b) under the guidance of the lifting surface (2b), and the tooth structures (33a, 33b) of the locking teeth (3a, 3b) are locked in a single direction under the action of the horizontal supporting surface (2 a).

2. A manual adjustment headrest according to claim 1, characterised in that the inner side of the bottom end of the locking tooth (3a, 3b) has an abutment ramp (32a, 32b) sloping downwards, the unlocking assembly (4) comprises a body plate (411) and a cantilever arm (412, 413) extending outwardly from the body plate (411), the end of the cantilever arm (412, 413) remote from the body plate (411) has an action ramp (41a, 41b), the action ramp (41a, 41b) being in contact with the abutment ramp (32a, 32b) to urge the locking tooth (3a, 3b) through the unlocking assembly (4).

3. The manual adjustment headrest according to claim 2, characterized in that the middle of the bottom end of the locking tooth (3a, 3b) has a waist-shaped hole (34a, 34b), the end of the cantilever (412, 413) remote from the main body disc (411) has a boss pin (412a, 413a), and the boss pin (412a, 413a) is inserted into the waist-shaped hole (34a, 34b) to pull the locking tooth (3a, 3b) by the unlocking assembly (4).

4. The manual adjustment headrest according to claim 1, wherein the first cover (1) has an unlocking shaft (13), the unlocking assembly (4) includes an unlocking member (41) and an unlocking torsion spring (42), the unlocking member (41) is fitted over the unlocking shaft (13) to be rotatable around the unlocking shaft (13), and the unlocking torsion spring (42) is installed between the unlocking member (41) and the first cover (1) to provide a rotational driving force for the unlocking member (41).

5. The manual adjustment headrest according to claim 4, wherein one end (42a) of the unlocking torsion spring (42) is fixedly connected to the unlocking member (41) through a mounting hole (411a), and the other end (42b) of the unlocking torsion spring (42) is fixedly connected to the first cover (1) through a stopper groove (14).

6. The manual adjustment headrest according to claim 4, wherein the unlocking assembly (4) further comprises an unlocking lever (43) and an unlocking button (44), wherein both ends of the unlocking lever (43) are connected to the unlocking member (41) and the unlocking button (44), respectively, and the unlocking button (44) is slidably mounted on the first cover (1).

7. The manual adjustment headrest according to claim 1, characterized in that the first cover (1) has a locking shaft (12a, 12b), the tip of the locking tooth (3a, 3b) has a shaft hole (31a, 31b), and the locking shaft (12a, 12b) is inserted into the shaft hole (31a, 31b) such that the locking tooth (3a, 3b) is rotatable around the locking shaft (12a, 12 b).

8. The manual adjustment headrest according to claim 1, characterized in that the fixed lever assembly (2) further comprises a fixed lever (21) and a bushing (23a, 23b, 23c, 23d), wherein the fixed gear (22a, 22b) is fixedly mounted on the fixed lever (21) and the first cover (1) is slidably mounted on the fixed lever (21) through the bushing (23a, 23b, 23c, 23 d).

9. The manual adjustment headrest according to claim 8, characterized in that the first cover (1) has a fixing rod slot (11a, 11b), through which fixing rod (21) passes through the fixing rod slot (11a, 11b) and is mounted through a bushing (23a, 23b, 23c, 23 d).

10. The manual adjustment headrest according to claim 1, further comprising a second cover (5) and a foaming member (6), wherein the second cover (5) is fixedly connected with the first cover (1), and the foaming member (6) covers the outer sides of the first cover (1) and the second cover (5).