CN104302510B - locking device for headrest - Google Patents

Abstract

The invention discloses the locking device (1) for headrest, described locking device has head rest pole (3), guide sleeve (2) for head rest pole, and barrier element (5), wherein barrier element can move between locked and unlocked positions relative to guide sleeve, under described latched position, barrier element engages with the recess (4) in head rest pole, and under described unlocked position, barrier element and the recess debonding in head rest pole, and barrier element can pivot around the rotation axis being parallel to head rest pole relative to guide sleeve, in wherein barrier element is arranged on guide sleeve, to such an extent as to when there is relative rotary motion between guide sleeve and head rest pole, barrier element rotates around rotation axis together with head rest pole at least in part.

Description

Locking device for headrest

Technical field

The present invention relates to the locking device for headrest, wherein locking device has barrier element, institute State barrier element to be arranged for engaging with the recess in the head rest pole rested the head on.

Background technology

This locking device is such as generally from document DE 10 2,005 012 896 A1 and DE 10 In 2008 064 462 A1 known.Headrest is generally of two head rest poles, and said two head rest pole exists Extend parallel to from head engagement pad on the direction of backrest, and be maintained in the way of Height Adjustable In the respective guide sleeve of backrest.In order to pillow holder being scheduled at desired height, at least one head Pillow bar is provided with recess, and the barrier element of guide sleeve can be bonded on described recess in an interlocked manner In.Barrier element is pre-tensioned in the way of spring on the direction of recess.User can be led to Crossing actuating element overcomes spring force by locking device from recess debonding, so as to locking filled Put unblock and the altitude mixture control rested the head on can be carried out.User can be discharged into activating element again In desired location, in therefore barrier element is latchable to corresponding recess, and locking device is locked again Fixed.

From a defect of such locking device known in the art it is, when head rest pole phase When rotating for guide sleeve, locking device can occur less desirable unblock.Particularly there is thing In the case of therefore, may produce high acceleration force, its result is it may happen that this rotation. If head rest pole unlocks, then headrest can move freely, in some instances it may even be possible to can be by completely from guide sleeve Release.This automotive occupant to being seated on seat constitutes sizable injury risk.

Summary of the invention

The invention aims to provide the locking device for headrest, wherein prevent due to head rest pole And relative rotary motion between guide sleeve and being not intended to of causing unlocks.

This purpose is by realizing for the locking device of headrest, and described locking device has headrest Bar, barrier element and for the guide sleeve of head rest pole, wherein said barrier element can be relative to Guide sleeve moves between locked and unlocked positions, wherein barrier element under latched position Engage with the recess in head rest pole, and under unlocked position, barrier element and the recess solution of head rest pole Except engaging, wherein barrier element is designed to be able to relative to guide sleeve around being parallel to head rest pole Rotation axis pivots.

In a favourable manner, the relative rotary motion process between guide sleeve and head rest pole In, barrier element can rotate at least in part together with head rest pole, because barrier element is around rotation Shaft axis is rotatably mounted.The result avoiding head rest pole and barrier element jointly to rotate is to stop unit Part invariant position in head rest pole recess, or the most less significant change, therefore lock dress Put and will not unlock.In other words, barrier element be arranged in this manner in guide sleeve to such an extent as to Barrier element is able to carry out rotating relative to the compensation of described guide sleeve, mends the most at least in part Repay the rotation of head rest pole.

According to a preferred embodiment of the present invention, barrier element around rotation axis with relative to drawing Lead sleeve rotating 5 to 40 degree between angle, preferably 10 to 20 degree between angle and The angle of particularly preferably substantially 15 degree is rotatably mounted.

Provide according to a preferred embodiment of the present invention, barrier element include stop bolt and Activating element, wherein said actuating element includes outboard section and inboard section, outboard section and interior Side sections is not connected to each other with not can be movable relatively.Outboard section be preferably designed with circular edge and/ Or be semicircular design.Specifically, inboard section is around head rest pole, and is deviating from described outside There is on section side stop bolt.In order to activate, activate element and move along the principal direction moved, Described principal direction extends in the plane being perpendicular to head rest pole axial direction.Inboard section and lateral part Two webs that Duan Youxuan is extended by the principal direction being parallel to motion do not couple with not can be movable relatively To each other.

Provide according to a preferred embodiment of the present invention, guide sleeve have be parallel to motion Two guiding recessed channel that principal direction extends, the free branch of outboard section guides recessed channel in said two The most displaceably it is guided.Branch preferably has the edge with curvature and/or circle, therefore has Realize activating element sharply and be parallel to the guiding of motion principal direction, activate element simultaneously and such as occurring It is possibly realized around the rotation of rotation axis relative to guide sleeve in the case of accident.Specifically, Pre-tensioner for the barrier element spring assembly in latched position is arranged in and activates outside the deviating from of element On the side of side sections.

The further details of the present invention, feature and advantage are from accompanying drawing and excellent below with reference to accompanying drawing The description selecting embodiment displays.Herein accompanying drawing only illustrate the present invention be not intended to substantially invent The exemplary embodiment of design.

Accompanying drawing explanation

Fig. 1 illustrates the perspective schematic view of locking device according to an exemplary embodiment of the present invention.

Fig. 2 illustrates the schematic cross section signal of locking device according to an exemplary embodiment of the present invention Figure.

Fig. 3 and Fig. 4 illustrates the locking that moment of torsion is applied to it according to an exemplary embodiment of the present invention The perspective schematic view of device.

Detailed description of the invention

Fig. 1 and Fig. 2 illustrates that the locking for (not shown) of resting the head on according to exemplary embodiment fills Put the schematic diagram of 1.Locking device 1 has guide sleeve 2, for supporting head part contact portion (not Illustrate) head rest pole 3 be fastened in guide sleeve 2.Head rest pole 3 includes pipe or solid material Cylinder, wedge-shaped recess 4 is arranged on described pipe along head rest pole 3 axial direction 100 with proportional spacing Or on the outer peripheral face of the cylinder of solid material.

Head rest pole 3 is displaceably mounted in guide sleeve 2 on axial direction 100.Guide sleeves Cylinder 2 is preferably embedded into (not shown) in the upside of vehicle seat back.Locking device 1 has resistance Gear element 5, described barrier element is relative along the horizontal direction 101 being perpendicular to axial direction 100 Displaceably install in guide sleeve 2.Barrier element 5 includes stopping bolt 51 and activating element 52.Barrier element 5 is conciliate along horizontal direction 101 in latched position (seeing Fig. 1 and Fig. 2) Move between lock position (not shown), under latched position, wherein stop bolt 51 and each recess 4 In a joint, and under unlocked position, stop bolt 51 and recess 4 debonding.At lock Location is put down, prevents the head rest pole 3 movement on axial direction 100, and under unlocked position, Head rest pole 3 can be at axial direction 100 top offset, such as to regulate the height of vehicle seat head rest Degree.Barrier element 5 by the way of spring element 6 is with spring on the direction of latched position It is pre-tensioned.By activating the element 52 manual actuating along horizontal direction 101, stop bolt 51 move in unlocked position from latched position.

Activate element 52 and include outboard section 53 and inboard section 54, outboard section 53 and inner side Two webs 55 that section 54 extends by being parallel to horizontal direction 101 are rigidly coupled to each other. Inboard section 54 is cincture head rest pole 3 in the plane being perpendicular to axial direction 100.Stop bolt 51 are arranged on the side deviating from outboard section 53 of inboard section 54, and to be perpendicular to axial side To 100 and be perpendicular to the mode of horizontal direction 101 and extend.The guidance field 56 of inboard section is even At horizontal direction 101 in the same stop bolt 51 guiding holding part 21 in guide sleeve 2 together On be displaceably guided.Outboard section 53 has semicircular design, and has along horizontal stroke The Liang Ge branch 57 in guide sleeve 2 is extended to direction 101.Branch 57 is in guide sleeve 2 Guiding recessed channel 22 in be guided, guide recessed channel extend on horizontal direction 101.Branch 57 Having with curvature and circular edge, therefore activating element 52 can be relative to guide sleeve 2 Rotate around the rotation axis 102 being parallel to axial direction 100.For this purpose it is proposed, activate element 52 Limit edge 58 be further designed to from the insertion edge 23 of guide sleeve 2 spaced apart.Additionally, The each edge activating element 52 is all circular.

If acceleration force the leaning on relative to seat that head rest pole 3 is such as caused due to accident The back of the body rotates, then activate element 52 and therefore also have and stop that bolt 51 also is able to be moved through certain Angular range, thus prevent by stopping that bolt 51 skids off locking device that recess 4 causes not Desired unblock.On the contrary, stop that bolt 51 can keep being arranged in the recess rotating head rest pole 3 In, therefore fix head rest pole 3.Barrier element 5 relative to guide sleeve 2 around rotation axis 102 It is rotatably mounted, specifically rotates about 15 degree.Rotation axis 102 is specifically put and is extended middlely And on axial direction 100, extend through head rest pole 3.

Fig. 3 and Fig. 4 illustrates and is under the state that torque 103 acts on head rest pole 3 (Fig. 4) Reference Fig. 1 and Fig. 2 describe locking device 1.From Fig. 4 it can be seen that barrier element 5 at least Partly move together with rotation head rest pole 3, and therefore barrier element 5 can be relative to guiding Sleeve 2 rotates 104 around rotation axis 102.Therefore barrier element 5 is installed in this manner In guide sleeve 2, to such an extent as to barrier element 5 is able to carry out relative to described guide sleeve 2 Compensate and rotate, therefore, it is possible to compensate the head rest pole 3 rotation around rotation axis 102 at least in part.

List of numerals

1 locking device

2 guide sleeve

3 head rest poles

4 recesses

5 barrier elements

6 spring elements

51 stop bolt

52 activate element

53 outboard section

54 inboard section

55 webs

56 guidance fields

57 branches

58 limit edge

21 guide holding part

22 guide recessed channel

23 insert edge

100 axial directions

101 horizontal directions

102 direction of rotation

103 moments of torsion

104 rotate

Claims (9)

1., for the locking device (1) of headrest, described locking device includes:

Head rest pole (3),

For the guide sleeve (2) of head rest pole (3), and

Barrier element (5),

Wherein barrier element (5) can conciliate lock-bit relative to guide sleeve (2) in latched position Move between putting, barrier element (5) and the recess in head rest pole (3) under described latched position (4) engage, and under described unlocked position, recessed with head rest pole (3) of barrier element (5) Portion (4) debonding,

Wherein barrier element (5) can be relative to guide sleeve (2) around being parallel to head rest pole (3) Rotation axis (102) pivot,

In wherein barrier element (5) is arranged on guide sleeve (2) in this manner, to such an extent as to The process of relative rotary motion between the guide sleeve (2) caused by accident and head rest pole (3) In, barrier element (5) at least in part together with head rest pole (3) around rotation axis (102) Rotate,

Wherein barrier element (5) includes stopping bolt (51) and activating element (52), Qi Zhongzhi Dynamic element (52) includes being rigidly connected to outboard section (53) each other and inboard section (54),

Wherein guide sleeve (2) has two guiding recessed channel (22) being parallel to the extension of motion principal direction, The free branch (57) of outboard section (53) is guided in described guiding recessed channel movably, And

The freest branch (57) has the edge with curvature and/or circle so that activating element (52) can be relative to guide sleeve (2) around the rotary shaft being parallel to axial direction (100) Line (102) rotates.

Locking device the most according to claim 1 (1), it is characterised in that barrier element (5) Around rotation axis (102) to rotate the angle between 5 to 40 degree relative to guide sleeve (2) It is rotatably mounted.

Locking device the most according to claim 1 (1), it is characterised in that barrier element (5) Around rotation axis (102) to rotate the angle between 10 to 20 degree relative to guide sleeve (2) Degree is rotatably mounted.

Locking device the most according to claim 1 (1), it is characterised in that barrier element (5) Around rotation axis (102) to rotate the angle of 15 degree rotatably relative to guide sleeve (2) Install.

5. according to the locking device (1) according to any one of claim 1-4, it is characterised in that Outboard section (53) is provided with the edge of circle and/or is semicircular design.

6. according to the locking device (1) according to any one of claim 1-4, it is characterised in that Inboard section (54) is around head rest pole (3), and has on outboard section (53) side deviating from Described stop bolt (51).

7. according to the locking device (1) according to any one of claim 1-4, it is characterised in that Activating element (52) to move along the principal direction moved, described principal direction is being perpendicular to head rest pole (3) Axial direction (100) plane in extend.

8. according to the locking device (1) according to any one of claim 1-4, it is characterised in that Inboard section (54) and outboard section (53) pass through to be parallel to two of the principal direction extension of motion Web (55) is rigidly connected to each other.

9. according to the locking device (1) according to any one of claim 1-4, it is characterised in that By pre-tensioner for barrier element (5) layout of spring in latched position in the back of the body activating element (52) On the side of outboard section (53).