RU2509004C1 - Car seat backrest - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to automotive seat system. Car seat backrest comprises headrest with height adjustable with the help of guide and crossbar arranged at backrest top part and fixed thereto. Said guide comprises guide device 25 fixed to crossbar to guide said guide element secured to headrest and built therein. Lock 50 is secured to said guide, its locking part 51 being attached to crossbar 18 and another locking part 52 secured to headrest 4. Both said parts 51 and 52 interact as ledge and recess.

EFFECT: manual adjustment of headrest position.

10 cl, 6 dwg

Description

Technical field

This invention relates to a car seat back, comprising a head restraint that is height-adjustable by means of a guide, and a cross member that is located in the upper part of the back and is fixedly attached to the latter.

State of the art

DE 20 2009 013 635 U1 describes a head restraint that is manually adjustable in height by means of a fixed anchor that interacts with an adjustable stop. For this purpose, the back of the car seat, to which the head restraint is attached, has two guide rods, one ends of which are fixedly fixed in the back, and the other ends of which are connected to each other by a clamp. Thus, the headrest moves along the guide rods when the specified headrest is manually adjusted in height. However, in this case, there is a problem in that the lower part of the head restraint has two openings from which the guide rods of the head rest out. In addition, depending on the fixed position of the head restraint, parts of the guide rods that differ in length are visible. Therefore, an aesthetically satisfactory solution was not provided.

Another head restraint is known from DE 32 23 649 C2. It describes auxiliary racks, where each of these racks holds a rod on which the bearings are mounted, and these bearings move along the rods when moving the headrest. This is a structured decision.

In addition, the seatbacks of the type in question for car seats are already known from the applicant's earlier document DE 10 2010 060 076.8, which is not a previous publication. It provides an aesthetically satisfactory solution for adjusting the height of the head restraint. However, it provides only motorized adjustment options.

Disclosure of invention

The objective of the invention is the equipment of the backrest of the type in question with additional features for manual adjustment of the headrest.

This problem is solved by means of the signs according to claim 1 of the claims. According to him, a locking device is installed on the headrest guide, one locking part of which is attached to the cross member, and a second locking part of which is attached to the headrest, both parts interacting on the principle of a protrusion and a hole. Thus, the backrest of the type in question, which due to the appearance of the combined head restraint is an aesthetic solution, provides the possibility of manual adjustment of the head restraint, and the adjustment is structurally simple and at the same time visually attractive.

The guiding device, which is fixedly attached to the backrest cross member, is preferably made in the form of a bearing, in particular in the form of a sliding bearing, and / or the guiding element, which is guided by guiding devices and attached to the head restraint, is made in the form of a guiding rod. This provides a high degree of strength.

Particularly reliable head restraint control is carried out using two guiding devices. The headrest torsion protection is provided by guides mounted on the left and right side of the headrest.

In contrast to the known solutions, in the back of the type under consideration, guiding devices, i.e. bearings, motionlessly fixed on a cross-beam of a back. These bearings are placed in the headrest housing in such a way that, both in the upper and lower positions of the head restraint, these bearings are completely covered by the head restraint. In this case, the head restraint contains fixed guide elements, i.e. guide rods that are guided by bearings when adjusting the headrest. In addition to the visually appealing appearance, this at the same time provides higher head restraint strength due to the fact that the size of the arm shoulder acting on the head restraint is reduced by short distances between the respective bearings and the guide rods. Using the locking device according to the invention, which consists of two specially arranged and coordinated interacting locking parts, the advantages of the backrest of the type in question are preserved, even if the headrest has a function of manually adjusting the height.

In a preferred embodiment, one of the two locking parts of the locking device is in the form of a locking plate. Such a locking plate has one hole, but preferably more than one hole, for the entry of the protrusion or protrusions of the mating locking part, which interacts with said locking part. In this case, it is preferable to fix the locking part, presented in the form of a locking plate, to the back cross member in order to increase the fixation stiffness.

In the same preferred embodiment, one of the two locking parts of the locking device is in the form of a comb. Such a comb contains a plurality of protrusions, and thus provides a simple adjustment of the head restraint, while at the same time securely locking and interacting with the associated locking part with said locking part.

The sequence of movement during manual adjustment of the height of the headrest is simplified if the comb runs parallel to the guide elements, i.e. guide rods. In this case, the comb simply shifts in the direction of movement of the head restraint when it is manually adjusted and is fixed in the desired end position of the head restraint by means of the associated locking part.

A particularly convenient mode for manually adjusting the height of the head restraint is by free movement of the comb, defined by the pusher or slider. The comb rotates when the slider moves, as a result of which the locking device is locked or unlocked.

Slider control is especially convenient using the control button, which is located directly on the outside of the headrest. To manually adjust the height of the head restraint, they first act on the control button, as a result of which the slider is activated, and the comb rotates from its fixed initial position, and thus the locking device is unlocked. Accordingly, as long as the control button is activated, the usual adjustment of the height of the headrest is possible manually. When the control button is off, the comb rotates back to a fixed initial position, and thus the locking device is locked in the new desired position of the headrest.

The control is further simplified due to the fact that the comb is prestressed mechanically, namely by means of a spring. This reduces the force required to actuate the comb.

Especially easy and economical to manufacture the back can be obtained due to the fact that the cross member and back are made as a whole, in particular, as a casting of light metal.

Brief List of Drawings

Additional advantages, features and details of the invention are presented in the description below, with reference to graphic materials, on which:

figure 1 shows a perspective image of the upper back of the type in question with a height-adjustable headrest;

figure 2 shows the same image as in figure 1, with a guide for adjusting the height inside the headrest;

figure 3 shows a perspective image of the upper part of the back according to the invention with a manually adjustable height headrest and locking device in a locked state;

figure 4 shows a separately locking device in a locked state;

figure 5 shows the same image as in figure 3, but with the locking device in the unlocked state;

figure 6 shows a separately locking device in the unlocked state.

The implementation of the invention

A number of figures show a part of the seat of the car 1 with the upper part of the backrest 2. The headrest 4 is attached to the backrest 2 with the possibility of height adjustment. Preferably, the headrest 4 also has the additional possibility of longitudinal adjustment.

The backrest 2 includes a support 5, which is stuffed with a stuffing material 8, 9. The headrest 4 is similarly stuffed with a stuffing material 6. The frame 10 with the bracket 12 come out of the backrest 5. The bracket 12 is presented in a U-shape and, together with the upper face of the rear part 14 of the seat frame, limits the gap 15. Preferably, the backrest 5 and the frame 10 are formed integrally with the bracket 12, in particular in the form of light metal castings.

In the upper part of the backrest 2, the bracket 12 comprises a cross member 18, which is fixedly connected to the support of the backrest 5 through the frame 10. The cross member 18 extends perpendicular to the direction of movement of the vehicle. As can be seen in FIG. 1, the cross member 18 extends inside the head restraint 4. The stuffing material of the head restraint is respectively located between the upper and lower faces of the head restraint. Therefore, a slot 20 is made in the inner part of the headrest. The cross member 18 is upholstered in parts of the stuffing material 8 on the outside on the sides.

The height adjustment of the head restraint 4 is possible due to a guide 22 containing two guide devices 24, 25. Two guide devices 24, 25 are presented, in particular, in the form of sliding bearings, and are fixedly attached to the cross member 18, for example, welded to it. In the guiding devices 24, 25, the guiding elements, in particular, are presented in the form of guiding rods 28, 29 with adjustable height. The guide rods 28, 29 are fixed with their ends inside to the upper part 40a and the lower part 40b of the headrest. For this purpose, these parts form the frame 40 in order to include the supporting structure in the inner part of the headrest 4.

Headrest 4 can be manually adjusted by the user. In this case, the position of the height-adjustable headrest 4 desired by the user is fixed by means of the locking device 50. The locking device 50 includes a first locking part 51, which is attached to the cross member 18 and is presented in the form of a locking plate. The locking plate contains many holes or recesses located one below the other. These holes or recesses are intended for selective input into them of the protrusions of the second locking part 52, which is presented in the form of a comb. Said comb 52 is rotatably fixed to the bottom of the support structure 42 of the head restraint 4. The comb contains a plurality of protrusions, which are best seen in FIGS. 4 and 6. By means of the protrusions of the comb 52 located at the same distance from each other, which exactly corresponds to the distance between recesses or holes on the locking plate 51, there are many specific positions in which the comb 52 is fixed in the locking plate 51.

Comb 52 is mechanically prestressed by a spring (not shown). In addition, a pusher or slider 53 is provided, which at one end acts on the leg of the comb 52. The other end of the slider 53 is directed to the side of the frame 40 of the head restraint 4. This end ends with a mechanical control button 54. Figures 3 and 4 show a locking device 50 in locked state.

If the specified control button 54 was then pressed by the user, the slider 53 moves towards the comb 52. After the slider 53 is pivotally connected to the base of the rotary comb 52, after said activation, the comb 52 with the locking plate 51 are moved from their fixed position. As a result, by moving the base of the comb 52 with the slider 53, the protrusions of the comb 52 exit the holes or recesses of the locking plate 51. As a result, the headrest 4 is no longer fixed and can be moved by the user to the desired position. 5 and 6 show the locking device 50 in the unlocked state.

After this position is established, the control button 54 is turned off by the user. Due to the prestressing by the spring, the comb 52, as a result, is again set to a locked state. If the position chosen by the user does not correspond to a clear fixed position, i.e. in the case when the protrusion of the comb 52 fell exactly between the two recesses or openings of the locking plate 51, it is sufficient for the user to carefully slide the headrest 4 up or down so that, by means of mechanical prestressing of the comb 52, the following fixed position of the locking device 50 is reached.

Based on the fact that the headrest 4 is mounted directly on the fixed frame 10 of the backrest 2, the guide elements 28, 29 are relieved of any load and, therefore, can be made thinner, lighter and more economical than in the case of conventional head restraints.

The forces acting on the headrest 4 are transmitted by the guiding elements 28, 29 through the guiding devices 24, 25 and the cross member 18 to the back frame 10. By the direction given by the guiding devices 24, 25, the size of the arms of the levers represented by the guiding elements 28, 29, when applying a load on the headrest 4, is significantly reduced.

The use of combs 52, in combination with the locking plate 51, provides the possibility of many combinations of protrusions and holes in the desired fixed position of the locking device 50. This allows you to achieve particularly high stability with regard to unwanted movements of the headrest 4 in height.

Claims (10)

1. The back of the car seat, comprising a head restraint, height-adjustable by means of a guide, and a cross member located at the top of the back and fixedly attached thereto, the guide comprising a guide device that is fixedly attached to the cross member and guides a guide member that is attached to the head restraint and is integrated in the latter, characterized in that a locking device (50) is connected to the guide (22), one locking part (51) of which is fixed to the cross member (18) and the other locking part (52) otorrhea fixed to the headrest (4), said both parts (51, 52) interact on the principle of the projection and the hole. 2. The backrest according to claim 1, characterized in that the guide device (24, 25) is made in the form of a bearing, in particular in the form of a sliding bearing, and / or the guide element (28, 29) is made in the form of a guide rod. 3. The backrest according to claim 2, characterized in that each of the two bearings is equipped with a separate guide rod. 4. The backrest according to one of claims 1 to 3, characterized in that the locking part, in particular the locking part that is attached to the cross member, is presented in the form of a locking plate. 5. The backrest according to one of claims 1 to 3, characterized in that the locking part, in particular the locking part, which is attached to the headrest, is presented in the form of a comb. 6. The backrest according to claim 5, characterized in that the comb is movable. 7. The backrest according to claim 6, characterized in that a slider (53) is designed to rotate the comb. 8. The backrest according to claim 7, characterized in that the slider is activated by a control button (54) located directly on the outside of the head restraint. 9. The backrest according to one of claims 6 to 8, characterized in that the comb is pre-stressed mechanically, namely by means of a spring. 10. The back according to one of claims 1 to 3, 6-8, characterized in that said back is made as a single part, namely in the form of light metal castings.

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