Bearing device for a headrest

Abstract

A storage device (10) for a headrest comprising a guide part (12) with which a retaining rod (11) of the headrest can be stored on a vehicle seat and can be detachably fixed in a locking position relative to the guide part (12) by means of a locking device (15), wherein the locking device (15) comprises a bolt (54) movable between a locking position and a release position, which is associated with the guide part (12) and comprises at least one recess (55) which is associated with the retaining rod (11), wherein an actuating device (16) of the locking device (15) comprises a force transmission connection in the form of a band (33), such that when the actuating device (16) is adjusted, the bolt (54) can be moved into the release position by a resulting actuating force, characterized in thatthat the retaining rod (11) can be moved from the locking position to a removal position by means of an ejector (36) guided on the guide part (12), and that the belt (33) is connected to the ejector (36).

Description

[0001] The invention relates to a bearing device for a support rod of a headrest. The bearing device comprises a locking device with which the support rod can be releasably locked in at least one position.

[0002] Such a bearing is known from prior use. The bearing comprises a guide sleeve that can be attached to the backrest of a vehicle seat. A slide is movably guided on the guide sleeve. A latch is held on the slide, which interacts with at least one recess in the support rod. The latch is spring-loaded in engagement with the recess. By actuating the slide, the latch can be moved from the locked position to a released position, in which the support rod is freely movable in directions z1 and z2 relative to the guide sleeve.

[0003] DE 21 38 078 A relates to an end-position locking device for a headrest. The headrest comprises a head support element with two support rods that are received in guide members of the backrest. A notch is provided at one free end of each support rod, which acts as a detent. A two-armed locking lever is formed on each guide member, with one arm of the locking lever engaging in the notch and the other arm being connected to a corresponding arm of the other locking lever by a spring. In one position, the spring presses the arms into the notch. In a second position, the spring holds the arms of the locking levers disengaged from the notches of the support rod.

[0004] DE 198 03 182 C2 discloses a vehicle seat with a backrest that is movable between a folded-down access position and a seated position and has a height-adjustable headrest. The backrest has a folding mechanism for folding it forward from the seated position to the access position and a height-adjusting mechanism for adjusting its height. Actuation of the folding mechanism releases, via a linkage, the locking element for lowering the headrest from a locked position to an adjustable position. The folding mechanism is connected to the locking element by means of a lever and a Bowden cable.

[0005] DE 10 2007 022 623 B4 discloses a headrest for mounting on a seat back with support rods, wherein the headrest includes an adjustment mechanism with a locking element for setting several positions relative to a seat back. The adjustment mechanism includes a cable which interacts with a release mechanism and the locking element when the tilting mechanism of the seat back is actuated. When the tilting mechanism is actuated, the headrest can be moved into a stowed position.

[0006] The object of the invention is to create a storage device which facilitates handling during the assembly of the support rod in a locking position as well as the disassembly from the locking position.

[0007] The problem is solved by a storage device having the features of claim 1.

[0008] The mounting device is designed to support a headrest with at least one support rod. The support rod is an integral part of the mounting device. The support rod can be, for example, a single rod or the free end of a support rod bracket. The mounting device also includes a guide element that allows the headrest support rod to be mounted on a vehicle seat. The guide element is attached to the vehicle seat, specifically to the seat back. The guide element includes bearing surfaces that guide and hold the support rod in a locking position during installation and during removal.

[0009] The bearing device comprises a locking device by means of which the support rod can be releasably fixed in a locking position relative to the guide element. The locking device includes a bolt movable between a locking position and a release position, which is associated with the guide element, and at least one recess associated with the support rod. In the locking position, the bolt engages with the recess. The support rod is then held immovably in the locking position. In the release position, the bolt and recess are disengaged, so that the support rod can be moved out of the locking position.

[0010] The locking device is adjustable between the locked and unlocked positions by means of an actuating device. Actuation can be manual or motorized. For example, the bolt is biased into the locked position by a return element. Actuating the device then moves the bolt from the locked position to the unlocked position. In this case, the return to the locked position is achieved by releasing the force applied to the actuating device.

[0011] The actuating device comprises a force transmission connection in the form of a band, e.g., a pulley-type band. When the actuating device is moved into the release position, the bolt is moved into the release position by a resulting actuating force. A second force component moves, e.g., via the connection, the ejector from a first position to a second position, whereby the ejector moves the retaining rod from the locking position to a removal position.

[0012] The storage device includes an ejector designed to move the retaining rod from the locking position to a removal position. A further resulting actuating force acts on the ejector, moving it from a first position to a second position. The ejector is connected to the retaining rod in such a way that the retaining rod is in a locking position when the ejector is in the first position and in a removal position when the ejector is in the second position.

[0013] In the locking position, the retaining rod is, for example, positioned in a seat of the guide part. In the removal position, the retaining rod is, for example, moved out of the seat in the direction of disassembly.

[0014] The actuating device includes a band that forms the connection. The band can be made of, for example, textile, metal, plastic, or a composite material. The band should be able to transmit tensile forces to a sufficient degree.

[0015] The band includes, for example, an actuation area which interacts with a stop of the bolt such that when a tensile force is applied to the band, a force is exerted on the stop, which moves the bolt into the release position. The actuation area is located, for example, between the ends of the band.

[0016] The belt is deflected, for example, at the abutment from one direction of extension to a second direction. At the point of contact between the belt's actuating section and the abutment, a resultant force from the actuating force acts on the bolt, moving it from the locked position to the released position. For example, the belt is loosely guided around the bolt's abutment and moves relative to it. An end section of the belt opposite the actuation point is, for example, fixed to the guide element, or alternatively, the force resulting at this end section is used to move another component, such as an ejector.

[0017] The bolt, for example, is in contact with a first stop on the guide element when locked and with a second stop when unlocked. These stops limit the bolt's movement. Furthermore, the stops allow force to be transferred from the bolt or a bolt holder to the guide element.

[0018] If, for example, the bolt holder forms the abutment, a force resulting from the actuating force can move the bolt into the release position, and another resulting force can actuate the ejector. When a tensile force is applied to the belt, the bolt is initially moved into the release position due to the resulting force, in which the bolt or a bolt holder is in contact with the second stop. After release, another resulting force can be absorbed by the guide element, or this force can alternatively actuate the ejector towards the second position, thus assisting the movement of the retaining rod into the ejection position.

[0019] The operating area is formed, for example, between a first end area and a second end area of ​​the belt.

[0020] One end of the belt is designed for motorized or manual operation. For manual operation, the belt may, for example, be equipped with a loop for a more convenient grip.

[0021] The bolt is, for example, associated with a bolt holder that is movably guided between the bolt position and the release position. The bolt holder can, for example, have a bolt section, or alternatively, an additional bolt element, such as a bolt wire, is attached to the bolt holder. The bolt holder is associated with, for example, primary guide elements that interact with secondary guide elements of the guide part to guide the bolt holder so that the bolt can move between the bolt position and the release position. Furthermore, the abutment for the strap can, for example, be formed on the bolt holder.

[0022] The bolt holder is guided, for example, in a recess of the guide element. For example, the guide element has guide elements, such as sliding surfaces, which interact with corresponding sliding surfaces of the bolt holder to guide the bolt holder and bolt movably between the locked and unlocked positions.

[0023] The bolt is mounted, for example, to allow translational or rotational movement between the bolt position and the release position.

[0024] In one embodiment, the bolt is biased into the bolt position by a spring. In this way, when the actuating device is released, the bolt is held in engagement with a recess. This ensures the safety of the bearing assembly.

[0025] The ejector is mounted, for example, to allow translational or rotational movement. With translational movement, the ejector can move, for example, parallel to the disassembly direction of the retaining rod. With rotational movement, for example, the rotational movement of an actuating surface of the retaining rod is such that the retaining rod can be moved, at least for part of the movement, from the locking position to the removal position by the ejector.

[0026] The ejector is additionally biased in the ejection direction by a spring. After the retaining rod is unlocked by moving the locking device from the locked position to the unlocked position, the ejector is simultaneously biased by the spring force and by the force exerted on the ejector via the connection in the disassembly direction. When the ejector moves from the first position to the second position, the spring relaxes, while the retaining rod moves into the removal position in the disassembly direction. When the retaining rod is moved into the locking position in the assembly direction, the spring is tensioned.

[0027] The retaining rod, for example, has a conical shape at its end. This feature causes the locking bolt to move out of the path of the support rod when the retaining rod is moved in the assembly direction, so that the locking bolt can automatically engage in the recess as soon as the retaining rod has reached the locking position.

[0028] The conical shape of the support rod is, for example, associated with a plastic part that is connected to the support rod. The support rod, which is designed, for example, as a support rod tube, can then be manufactured in the usual way, while the plastic part with the conical shape is produced by plastic injection molding.

[0029] An exemplary embodiment of the invention is described below in the figure description, also with reference to the schematic drawings. For the sake of clarity, identical or comparable parts, elements, or areas are designated with the same reference numerals, sometimes with the addition of lowercase letters, even where different embodiments are concerned.

[0030] Features that are described, illustrated, or disclosed only in relation to one embodiment may also be provided in any other embodiment of the invention. Such modified embodiments are included in the invention, even if they are not shown in the drawings.

[0031] All disclosed features are essential to the invention. The disclosure of this application hereby fully incorporates the content of the cited publications and the described prior art devices, also for the purpose of including one or more features of the items disclosed therein in one or more claims of the present application. Such modified embodiments are also encompassed by the invention, even if they are not shown in the drawings.

[0032] They show: Fig. 1 a perspective view of the bearing device, wherein the retaining rod is in the locking position and the locking device is in the latching position, Fig. 2 a side view of the storage device according to Fig. 1, Fig. 3 a longitudinal sectional view of the bearing device according to Fig. 2, Fig. 4 a section view according to section line A - A in Fig. 2, Fig. 5 a perspective view of the bearing device, wherein the retaining rod is in the locking position and the locking device is in the release position, Fig. 6 a side view of the storage device according to Fig. 5, Fig. 7 a longitudinal section view of the bearing device according to Fig. 6, Fig. 8 a perspective view of the storage device, wherein the retaining rod is in the removal position and the locking device is in the release position, Fig. 9 a side view of the storage device according to Fig. 8, and Fig. 10 a longitudinal section view of the bearing device according to Fig. 9.

[0033] The entire bearing device is designated by reference numeral 10 in the figures.

[0034] The storage device 10 comprises according to Fig. 1 a retaining rod 11, a guide part 12, and a locking device 15, which can be actuated by means of an actuating device 16 for the locking device 15.

[0035] In the present embodiment, the retaining rod 11 is a single retaining rod. A head mounting component (not shown) is, for example, mounted on two bearing devices 10. The locking device 15 can be provided on only one of the bearing devices 10 or, alternatively, on both bearing devices 10.

[0036] The support rod 11 is provided at an upper end region 18 with a fastening structure 17, with which the head mounting part can be attached to the support rod. In this embodiment, the fastening structure 17 is designed as a recess, but other fastening structures can also be used.

[0037] A lower end section 19 of the retaining rod 11 is received in a guide recess 20 of the guide part 12. In this embodiment, the guide part 12 is designed in two parts and has an upper guide part 13 and a lower guide part 14. The two-part design facilitates the assembly of the guide part 12. At an upper end section 21, the upper guide part 13 has an annular thickening 22, which serves to receive a sliding bearing.

[0038] At a lower end region 23 of the upper guide part 13, first guide means 24 are formed, which cooperate with second guide means 25 of the lower guide part 14 to move the upper guide part 13 into a detent position of the lower guide part and to connect these parts together in this way.

[0039] The first guide means 24 are formed in the exemplary embodiment by webs 26a and 26b, wherein web 26a engages in grooves 27a and web 26b in grooves 27b. When the detent seat according to Fig. When position 1 is reached, a hook structure 28 of the guide lower part 14 engages with a recess 29 of the guide upper part 13. In the engaged state, the guide upper part 13 and the guide lower part 14 are not relative to each other.

[0040] A bearing structure 30 is formed on the upper guide section 13, which serves for the sliding guidance of a bolt holder 31. The bearing structure 30 includes a recess 32, on the inner surfaces of which the bolt holder 31 is guided such that it has degrees of freedom only in the directions y1 and y2. In this example, the bolt holder is movable in the directions y1 and y2 between a locked position and a release position, which will be explained in more detail below. The movement of the bolt holder 31 is approximately perpendicular to a longitudinal center axis m1 of the guide recess 20. In the lower end region 19 of the retaining rod 11, a longitudinal center axis m2 of the retaining rod 11 runs approximately parallel to the longitudinal center axis m1 when the retaining rod is in the locked or release position.

[0041] The locking device 15 comprises the actuating device 16, which allows the locking device 15 to be adjusted between the locked and unlocked positions. In the present example, the locking device 15 is actuated manually by an actuator 63. Alternatively, however, a motorized actuation could also be provided.

[0042] The actuating device 16 comprises a band 33, wherein the band 33 is manually actuated at an end region 34. In the present example, a loop is formed at the end region 34, at which a tensile force F1 can be applied to the band 33. Alternatively to the loop, another actuating device 63 could also be provided, such as a handle or, alternatively or additionally, a connection to a motor drive.

[0043] An end section 35 of the belt 33 is attached to an ejector 36 by means of a holder 37, which will be discussed further below.

[0044] The band 33 runs from the bracket 37 approximately parallel to the longitudinal center axis m1 in the direction of the z-axis, being guided by a guide 38 of the guide part 12 on the outside of the guide part 12. The band 33 rests against an abutment surface 57 of an abutment of the bolt holder 31, and is held in place by the abutment surface, which is in Fig. 1 is not discernible, deflected approximately perpendicularly in a direction parallel to the axis y. The abutment surface 57 forms a sliding bearing over which the band 33 slides when it moves relative to the locking bar 31. Alternatively, a roller could also be provided over which the band 33 slides. In the present embodiment, the abutment surface 57 is formed by the reveal of a recess 39 in the locking bar 31.

[0045] The abutment surface, for example, acts as a pulley-like guide, so that a force F2 is absorbed at the abutment surface when a force F1 acts on the belt at the end section 34. The force F2 at the abutment surface 57 is, for example, twice as large as a force F1 acting on the support 37 and also on the end section 34 of the belt. The belt can move relative to the abutment surface 57.

[0046] Fig. 2 is a side view of the device approximately as shown by view arrow B in Fig. 1.

[0047] In the sectional view according to Fig. 3 It can be seen that the guide part 12 has sliding bearings 40 and 41, which are spaced apart from each other and are held on the guide part and project radially into a guide space 42 of the guide part 12 in such a way that they can guide the retaining rod 11 slidingly in the direction of z1 during assembly and in the direction of z2 during disassembly.

[0048] A spring 44 is received in a receiving chamber 43 of the guide part 12, the spring end 45 of which is supported against a base surface 46 of the guide part. A spring end 47 is in contact with a contact surface 48 of the ejector 36, such that the spring 44 can load the ejector 36 in the direction z1 when it is under tension. The ejector 36 is guided in the guide part 12 such that it can only move in the directions z1 and z2. Fig. 3 The spring 44 is tensioned. The ejector 36 has an actuating surface 49 which is in contact with a counter surface 50 of an attachment part 51, which is firmly connected to the lower end region 19 of the retaining rod 11.

[0049] The attachment part 51 comprises an inclined surface 59, which is designed such that when the retaining rod 11 is inserted in the direction z1 into the guide recess 20 of the guide part 12, a force can be exerted on the bolt located in the path of movement in the direction y1, causing it to move out of the path of movement in the direction y1. In the present example, a conical circumferential chamfer is formed on the attachment part 51. As in Fig. As can be seen in Figure 3, the attachment part 51 forms an extension of the support rod 11.

[0050] In the Fig. 3 and Fig. Figure 4 shows that in the depicted locking position of the retaining rod 11, the attachment part 51 is arranged in a seat 52 of the guide part 12. The seat 52 is formed by an inner surface 53 of the guide part 12, e.g., the lower guide part 14.

[0051] According to Fig. 4 A separate bolt 54 is held on the bolt holder 31. The bolt 54 is formed, for example, by a wire attached to the bolt 54, e.g., injection-molded using a plastic injection molding process. Alternatively, the bolt can also be formed by a surface of the bolt holder 31, i.e., it is not a separate part. The bolt 54 is positioned according to Fig. 4 engages with a recess 55 of the retaining rod 11. The recess 55 is located on the lateral surface 56 of the retaining rod 11.

[0052] The bolt 54 engages in the recess 55 approximately radially to the longitudinal center axis m1, such that it prevents movement of the retaining rod 11 in the directions z1 and z2. The retaining rod 11 cannot move in any other spatial direction in the locked position either. The forces absorbed by the bolt 54 are transferred to the bolt holder 31 and from there to the guide element 12.

[0053] The function of the bearing device 10 is explained below. When the retaining rod 11 is in the locking position in the guide part and the bolt 54 is in the bolt position of the locking device 15 and engaged with the recess 55 of the retaining rod 11, the force of the spring 44 is transmitted via the ejector 36 to the retaining rod 11 and via the bolt holder 31 to the guide part 12.

[0054] An additional force F1 exerted on the belt 33 is transferred to the ejector 36, so that it is subjected to a force F1 acting in the direction of z1 in addition to the spring force. As long as the bolt 54 is engaged with the recess 55, this force is also absorbed by the guide element 12.

[0055] At the in Fig. On the recognizable abutment surface 57 of the bolt holder 31, a force F2 acts in direction y1 when an actuating force F1 is applied to the band 33. The force F2 causes the bolt holder 31 to move in direction y1, whereby the bolt 54 moves out of engagement with the recess 55. The locking device has thus been moved from the bolt position to the release position (see the Fig. 5 to 7). Areas 61 and 62 are separated by a distance s1.

[0056] Since the retaining rod 11 is no longer locked in the locking position, it can be moved by the spring force and the force F1 from the ejector 36 into a removal position, which in the Fig. Figures 8 to 10 are shown. The ejector 36 moves from a first position according to the Fig. 3 and Fig. 4 into a second position according to Fig. 10. Areas 61 and 62 are spaced apart by a distance s2.

[0057] In the removal position, the retaining rod 11 cannot be relocked when the force on the belt 33 decreases. Even if the locking bar holder 31 moves in the y2 direction, the locking bar 54 strikes an outer surface 58 of the attachment part 51 of the retaining rod 11, since the locking bar 54 and the recess 55 are in different positions with respect to the Z-axis.

[0058] From the removal position, the retaining rod 11 can be removed from the guide space 42 by a movement in the direction of z1. The springs 60 (see Fig. 10) The bolt holder 31, loaded in direction y2, is then moved in direction y2 until the holding surfaces 61 of the bolt holder 31 rest against a counter surface 62 of the guide part 12.

[0059] The retaining rod 11 is mounted by moving it in the mounting direction z2 into the guide space 42 until the inclined surface 59 of the attachment part 51 comes into contact with the latch 54 or the latch holder 31. Further movement in the direction of z2 exerts a force in the direction of y1 on the latch holder 31, which moves the latch holder 31 in the direction of y2 out of the path of movement of the retaining rod 11. The retaining rod 11 can therefore be moved further in the direction of z2 until the attachment part 51 is positioned in the seat 52. The retaining rod 11 is then again in the locking position. In the locking position, the bolt 54 and the recess 55 are at the same level with respect to the Z-axis, so that the bolt holder 31, which is loaded by springs 60 in the direction of y2, can move in the direction of y2, whereby the bolt 54 moves into engagement with the recess 55.

Claims

[1] A bearing device (10) for a headrest comprising a guide part (12) with which a retaining rod (11) of the headrest can be mounted on a vehicle seat and can be releasably fixed in a locking position relative to the guide part (12) by means of a locking device (15), wherein the locking device (15) comprises a bolt (54) movable between a locking position and a release position, which is associated with the guide part (12) and comprises at least one recess (55) which is associated with the retaining rod (11), wherein an actuating device (16) of the locking device (15) comprises a force transmission connection in the form of a band (33), such that when the actuating device (16) is adjusted, the bolt (54) can be moved into the release position by a resulting actuating force. characterized by, that the retaining rod (11) can be moved from the locking position to a removal position by means of an ejector (36) guided on the guide part (12) and that the belt (33) is connected to the ejector (36). [2] Bearing device (10) for a headrest according to the preamble of claim 1, characterized by , that the belt (33) is guided in a pulley-like manner, wherein the belt (33) has an actuation area which interacts with an abutment of the bolt (54) such that a force can be exerted on the abutment by means of a tensile force on the belt (33), whereby the bolt (54) can be adjusted into the release position, wherein the actuation area is arranged between the end regions (34, 35) of the belt (33). [3] Storage device (10) according to one of the preceding claims, characterized by, that the belt (33) is connected to an ejector (36) guided on the guide part (12) for the retaining rod (11) such that a further resulting actuating force acts on the ejector (36) and loads it from a first position to a second position. [4] Storage device (10) according to claim 1, characterized by , that the band (33) includes an actuation area which interacts with an abutment of the bolt (54) such that when a tensile force is applied to the band (33) a force is exerted on the abutment which moves the bolt (54) into the release position. [5] Storage device (10) according to any one of the preceding claims, characterized by , that in the locking position the band (33) is deflected at the abutment from a first extension direction (y1, y2) to a second extension direction (z1, z2). [6] Storage device (10) according to any one of the preceding claims 2 to 4, characterized by, that the operating area is formed between a first end area (34) and a second end area (35) of the belt (33). [7] Storage device (10) according to one of the preceding claims, characterized by , that one end area (34) of the belt (33) forms a motor or manual actuation (63) and the other end area (35) forms a support on the ejector (36). [8] Storage device (10) according to any one of the preceding claims, characterized by , that the bolt (54) is assigned to a bolt holder (31) which is movably guided between the bolt position and the release position. [9] Storage device (10) according to claim 8, characterized by , that the bolt holder (31) is guided in a recess (32) of the guide part (12). [10] Storage device (10) according to one of the preceding claims, characterized by, that the bolt (54) is in contact with a first stop in the bolt position and with a second stop in the release position. [11] Storage device (10) according to any one of the preceding claims, characterized by that the bolt (54) is mounted in a translationally displaceable or rotatable manner. [12] Storage device (10) according to any one of the preceding claims, characterized by , that the bolt (54) is loaded into the bolt position by at least one spring (60). [13] Storage device (10) according to one of the preceding claims, characterized by , that an ejector (36) is mounted to be movable translationally or rotationally. [14] Storage device (10) according to any one of the preceding claims, characterized by , that an ejector (36) is loaded by at least one spring (44) in the ejection direction. [15] Storage device (10) according to any one of the preceding claims, characterized by, that the retaining rod (11) has a conical structure at its end. [16] Storage device (10) according to claim 15, characterized by , that the cone structure is assigned to an attachment part (51), which is designed in particular as a plastic part and which is connected to the retaining rod (11).

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