Seat and method

p0001The invention relates to a seat, in particular a vehicle seat, according to the preamble of claim 1. In particular for motor vehicles, it is increasingly necessary to provide components which meet the comfort requirements of their users to an increasing extent. In the case of seats for motor vehicles, this has the effect that, for example, the backrest of a seat located in front of the rear seat bench, ie, away from the rear seat bench, is folded as an entry aid into a motor vehicle for users of the motor vehicle who want to sit in the seat of a motor vehicle seat shall be. Particularly suitable for vehicles particularly suitable for families, especially so-called "vans" or "large space limousines", it is advantageous that further functional possibilities or positions of vehicle seats are possible, for example the backrest of such a seat can be folded forwards in such a way that the rear side of the vehicle seats, Backrest as a table.

p0002It is generally known to use vehicle seats which, particularly in vehicles which do not have separate doors as access for a rear seat bench, have a backrest in such a way that the backrest of the vehicle seat is folded forward for the comfortable entry of passengers onto the rear seat bench. For this purpose, as a rule, a mechanical unlocking device is actuated manually, so that the backrest, which is provided in its normal position in a certain adjustable inclination angle to the seat surface, can be folded forward. In this case, it is disadvantageous for the entire seat substructure to remain in the same position, ie to remain in the same position, and thus still hinder the passenger's entry. Such vehicle seats are, for example, from the printed documents<patcit id="pcit0001" dnum="DE10139538C1"><text>DE 101 39 538 C1</text></patcit>, <patcit id="pcit0002" dnum="DE29715345U"><text>DE 297 15 345 U</text></patcit>, <patcit id="pcit0003" dnum="DE10056024A"><text>DE 100 56 024 A</text></patcit>, <patcit id="pcit0004" dnum="EP0575733A"><text>EP 0 575 733 A</text></patcit> and <patcit id="pcit0005" dnum="DE10136244C"><text>DE 101 36 244 C</text></patcit> Is known, with a generic seat from the <patcit id="pcit0006" dnum="DE10139538C1"><text>DE 101 39 538 C1</text></patcit> Is exported.

p0003The invention is therefore based on the object of providing a seat, in particular a vehicle seat, which has the greatest possible degree of variation with regard to its setting positions provided for different use situations. In addition, it is provided according to the invention to prevent misuse of the setting possibilities or a non-provided combination of adjustment possibilities.

p0004This object is achieved according to the invention by a seat according to claim 1. This results in a high degree of adjustment possibilities, which leads to an increase in the operating convenience when the seat and the motor vehicle are used. Furthermore, it is advantageous that release means are provided, wherein the release means, when the backrest is in its folded position, causes a solution of either the diagonal attachment or the second attachment only during a predetermined time interval. As a result, abuses of use of the seat are still restricted.

p0005In a preferred embodiment of the invention, the seat part is provided separately from the seat substructure in the region of the second fastening in the entry position and / or the diagonal fastening is provided longitudinally displaced in the retracted position in the normal position. This results in particular in the advantage that the location where the seat part is located in its normal position can be released for use by an occupant. Furthermore, this results in the advantage that the seat is designed so as to be retractable, that is to say, even in the case of a relatively thick backrest part of the seat, use of the backrest as a table is possible without such a "table" being unsuitable for use in the vehicle because, for example, Too high.

p0006Furthermore, it is advantageous that a second actuator is provided for the separation of the seat part in the region of the second fastening and / or that a first actuator is provided for the longitudinal displacement of the diagonal fastening, wherein the first and / or the second actuator are provided in particular as electromotive actuators. Advantageously, this makes it possible to enable the various adjustment possibilities of the seat to be automated or controlled, and thus a direct unlocking by a user is omitted, which on the one hand facilitates the use because, for example, it is not necessary to handle the inaccessible locations of the seat , And, on the other hand, simplifies the design of the seat and thus lowers the costs because there is no need to provide bulky and weight-inducing handles, levers or other actuating devices.

p0007Furthermore, it is advantageous that first monitoring means are provided, wherein the first monitoring means prevent the solution of the diagonal mounting in the entry position and / or the second monitoring means, but the second monitoring means prevent the second fastening in the retracted position from being released . As a result, it is advantageously possible according to the invention that an abuse of the various adjustment possibilities of the seat is largely precluded by improper use.

p0008Furthermore, it is advantageous that the first monitoring means and / or the second monitoring means and / or the triggering means are provided as microswitches. This makes it possible in a particularly simple and cost-effective manner to provide the monitoring means according to the invention on a seat.

p0009Furthermore, it is advantageous that the seat has a control device for controlling the solution of the fasteners as a function of the position assumed by the seat. As a result of the realization of the control device, for example as a programmable control device, it is possible according to the invention in a simple manner to rule out misuse of the various adjustment possibilities of the seat according to the invention.

p0010A further object of the present invention is a method in which a seat according to the invention is controlled in such a way that it is able to reach a maximum of an angle

p0011User has selectable setting options, and at the same time an abuse of this increased functionality is severely restricted.

p0012The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing.<dl id="dl0001"><dt><b>FIG</b></dt><dd>Shows a seat according to the invention with a backrest part and a seat part.</dd><dt><b>1 a</b></dt><dd>Is schematically a control.</dd><dt><b>FIG</b></dt><dd>Shows various components of the seat according to the invention in an enlarged illustration.</dd><dt><b>FIG</b></dt><dd>Shows a detail of a side part of the seat part 3 with attached release means.</dd><dt><b>FIG</b></dt><dd>Shows the diagonal attachment.</dd><dt><b>FIG</b></dt><dd>Shows the second attachment.</dd><dt><b>6a to 6g</b></dt><dd>Show a sequence of positions of the seat according to the invention with respect to the entry position.</dd><dt><b>7a to 7g</b></dt><dd>Show a sequence of positions of the seat according to the invention with respect to the retracted position.</dd><dt><b>8a to 8d</b></dt><dd>Shows a first sequence of partially abusive positions of a seat.</dd><dt><b>FIG</b></dt><dd>Shows the <figref idrefs="f0005">FIG</figref> Is based on a logic diagram. </dd><dt><b>10a to 10d</b></dt><dd>Shows a second sequence of partially abusive positions of a seat.</dd><dt><b>FIG</b></dt><dd>Shows the <figref idrefs="f0006">FIG</figref> Is based on a logic diagram.</dd></dl>

p0013<figref idrefs="f0001"><b>FIG</b></figref> Shows a vehicle seat 1 or seat 1 according to the invention with a backrest part 2 and a seat part 3, the seat part 3 being connected to a seat substructure 4 via a front first fastener 20, a rear second fastener 40 and a diagonal fastener 30. According to the invention, the seat 1 is provided, in particular, substantially symmetrically with respect to its longitudinal axis, so that, in an advantageous embodiment of the seat 1, both the front first fastening 20 and the second fastening 40 and the diagonal fastening 30 both on the left side and on the right side of the seat 1 Seat 1 are provided. However, in the following, however, both sides of a respective attachment 20, 30 and 40 are meant, without differentiating the two sides of the seat 1 from the attachments 20, 30 and 40 in the singular.

p0014In <figref idrefs="f0001"><b>FIG. 1a</b></figref> The control 10 is shown schematically, which is connected to a release means 21, a first monitoring means 31, a first actuator 32, a second monitoring means 41, a second actuator 42, and an actuating means 43. The actuators 32, 42 of the second fastening 40 or of the diagonal fastening 30 are actuated by means of the control 10 as a function of the states of the triggering means 21 and of the monitoring means 31, 41 and of the actuating means 43, ie as a function of the existing locking and / or unlocking state Seat, controlled.

p0015In <figref idrefs="f0002"><b>FIG</b></figref> Various components of the seat according to the invention are shown in an enlarged representation, which is enlarged in explosion-like manner. Of the seat part 3, which is not shown in its entirety, only a lateral frame 3b is shown on which the triggering means 21 can be seen. Furthermore, the second attachment 40 and the diagonal attachment 30 are shown with their individual parts. The second attachment 40 comprises the second actuator 42 and the second monitoring means 41. The diagonal mounting 30 comprises the first actuator 32 and the first monitoring means 31. Furthermore, an actuating part 23, which is connected to the backrest part 2, is moved by a movement of the backrest part 2 And when the backrest part 2 is folded forward, the triggering means 21 is actuated.

p0016In <figref idrefs="f0002"><b>FIG</b></figref> A section of the side part 3b of the seat part 3 with the attached triggering means 21 is shown, wherein in a left part of the seat part 3, <figref idrefs="f0002">FIG</figref> The actuating part 23 which moves as a function of the position of the backrest or of the backrest part 2 cooperates with the release means 21 in such a way that the triggering means 21 signals a rearward folding of the backrest part 2 into its folded position. In the right part of the<figref idrefs="f0002">FIG</figref> The actuating part 23 is provided corresponding to the normal position of the backrest part 2 so that the actuating part 23 does not cooperate with the triggering means 21 and signals the folding position of the backrest part 2.

p0017In <figref idrefs="f0002"><b>FIG</b></figref> The diagonal fastening 30 is shown with its first actuator 32, its first monitoring means 31 and an adjusting bracket 34, on which the first actuator 32 acts. When the first actuator 32 acts on the adjustment bracket 34 of the diagonal mounting 30, the diagonal mounting 30 is released and can be displaced longitudinally, in particular, according to the invention.

p0018In <figref idrefs="f0003"><b>FIG</b></figref> The second attachment 40 is shown, wherein the second attachment 40 comprises the second actuator 42, the second monitoring means 41 and also an adjusting bracket 44, on which the second actuator 42 acts - analogously to the diagonal attachment 30. When the second actuator 42 is actuated on the adjustment bracket 44 of the second attachment 40, the second attachment 40 is released and can, in particular, release the seat part 3 relative to the seat substructure 4 so that the seat 1 or the backrest part 2, together with the seat part 3, Front first attachment 20, or about an axis of rotation in the region of the front first attachment 20.

p0019In <figref idrefs="f0003"><b>FIG. 6a to FIG. 6g</b></figref> A sequence of positions of the seat 1 according to the invention is illustrated in order to illustrate the adjustment of the seat 1 from its normal position into its entry position and back into its normal position. The designation of the various components of the seat in each case of these partial figures has been dispensed with for the sake of simplicity. In<figref idrefs="f0003"><b>FIG. 6a</b></figref> The seat 1 is shown in its normal position. The seat 1 is shown in FIG<figref idrefs="f0003"><b>FIG. 6b</b></figref> With the backrest part 2 folded forward. The release means 21 is activated by the pre-folding of the backrest part 2, so that the second actuator 42 can provide a release of the seat part 3 in the region of the second attachment 40,<figref idrefs="f0003"><b>FIG. 6c</b></figref> Is shown. In<figref idrefs="f0003"><b>FIG. 6d</b></figref> The entry position of the seat 1 is shown. It can be seen that sufficient space is available at the position at which the seat part 3 is located in the normal position in order, for example, to make it easy for a user to enter into a motor vehicle. In<figref idrefs="f0003"><b>FIG. 6e</b></figref> The movement of the seat 1 or of its backrest part 2 and of its seat part 3 is shown back to the normal position <figref idrefs="f0003"><b>FIG. 6f</b></figref> The second attachment 40 is engaged so that the seat part 3 is in turn fixedly connected to the seat substructure 4. In<figref idrefs="f0003"><b>FIG. 6g</b></figref> The seat 1 is shown in its normal position.

p0020In <figref idrefs="f0004"><b>FIG. 7a to FIG. 7g</b></figref> A sequence of positions of the seat 1 according to the invention is illustrated in order to illustrate the adjustment of the seat 1 from its normal position into its retracted position and back into its normal position. The designation of the various components of the seat in each case of these partial figures has been dispensed with for the sake of simplicity. In<figref idrefs="f0004"><b>7a</b></figref> The seat 1 is shown in its normal position. According to the invention, it is provided that a user can be actuated by means of the actuating means 43 connected to the control 10, which, however, in the figures - except schematically in FIG<figref idrefs="f0001">FIG. 1a</figref> - is not shown, can initiate the setting of the retracted position. For this purpose, the user actuates the actuating means 43, for example, a push-button, touchscreen or the same, signaling to the controller 10 that the user intends to adjust the seat 1 to the retracted position. By the actuation of the actuating means 43, therefore, a distinction can be made between the user request for the adjustment of the seat into the entry position and the retracted position. The seat 1 is shown in FIG<figref idrefs="f0004"><b>7b</b></figref> With the backrest part 2 folded forward. When the backrest part 2 is pushed forward, the triggering means 21 is activated, so that the first actuator 32, because of the actuation of the actuating means 43, has previously been possible to make a longitudinal displacement of the diagonal fastening 30,<figref idrefs="f0004"><b>7c</b></figref> And their complete displacement in <figref idrefs="f0004"><b>7d</b></figref> Is shown. The<figref idrefs="f0004"><b>7d</b></figref> Is at the same time the retracted position of the seat 1. The "parallelogram" formed by the first fastening 20 and the second fastening 40 is obtained by a locked, ie, locked, diagonal fastening 30 in the normal position of the seat 1. In the retracted position of the seat 1 it is now so that by the unlocking of the diagonal fastener 30, a longitudinal displacement of the latter is possible, which - with appropriate manual operation of a user - results in a "folding" of the parallelogram. In<figref idrefs="f0004"><b>7e</b></figref> The movement of the seat 1 or of its backrest part 2 and of its seat part 3 is shown back to the normal position <figref idrefs="f0004"><b>7f</b></figref> In turn a longitudinal displacement of the diagonal part, which takes place in FIG <figref idrefs="f0004"><b>FIG. 7g</b></figref> Results in a latching of the diagonal fastening 30 in a length corresponding to the normal position of the seat 1.

p0021In <figref idrefs="f0005"><b>FIG. 8a to FIG. 8d</b></figref> A first sequence of positions of a seat is illustrated to illustrate the adjustment of the seat from the retracted position to an unauthorized position misusing the large adjustment possibilities of a seat. In the<figref idrefs="f0005"><b>FIG. 8a</b></figref> The diagonal fastening 30 is longitudinally displaced. If, in this situation, the backrest part 2 is erected (cf.<figref idrefs="f0005"><b>FIG. 8b</b></figref>) - the trigger 21 being switched off - and subsequently being adjusted again into its folding position (cf. <figref idrefs="f0005"><b>FIG. 8c</b></figref>The release means 21 is actuated again by the actuating part 23 and an unlocking or a release of the second fastening 40 is initiated by the control 10, it is possible that by the solution of the second fastening 40 (see FIG. <figref idrefs="f0005">FIG. 8d</figref>), A rearward folding of the seat 1 about a rotational axis lying in the region of the first fastening 20 is conceivable despite the diagonally attached fastening 30, which is naturally not locked in the retracted position. Such an abuse of the adjustment possibilities is prevented according to the invention by the fact that the first monitoring means 31, which are actuated by the solution of the diagonal fastening 30 in the retracted position, are fastened to the diagonal fastening 30 and, when actuated, a solution of the second fastening, ie actuation of the second actuator 42.

p0022In <figref idrefs="f0005"><b>FIG</b></figref> is that in <figref idrefs="f0005">FIG</figref> In a seat 1 according to the invention is again shown on the basis of a logic diagram. In<figref idrefs="f0005">FIG</figref> Four lines are shown which represent states of different components of the seat 1 according to the invention. Each line represents the time profile t of the state of the respective component. The designation "0" means that the corresponding component is inactive or not activated. The first line relates to the actuating means 43, the second line relates to the actuating means 21, the third line relates to the first actuator 32, and the fourth line relates to the first monitoring means 31. In a first time t1, the actuation means 43 is activated by a user actuation. As a result, the backrest part 2 is adjusted to its folded position. When the folding position is reached, the triggering means 21 is activated (by means of the actuating part 23), which is the case at the second time t2. By actuation of the triggering means 21, the control 10 activates the first actuator 32 during a predetermined time interval T of, for example, 500 ms, in order to enable the sinking position to be achieved. When the first actuator 32 has released the adjustment bracket 34 of the diagonal mounting 30, the first monitoring means 31 is activated at the third instant t3. The control is now provided according to the invention in such a way that subsequent activation of the second actuator does not occur as long as the first monitoring means signals an unlocking of the diagonal fastening 30 and this also applies to the case where the triggering means 21,<figref idrefs="f0005">FIG</figref> Is again actuated and in principle can effect release of the second fastener 40 by activation of the second actuator 42.

p0023In <figref idrefs="f0006"><b>10a to FIG. 10d</b></figref> A second sequence of positions of a seat is illustrated to illustrate the adjustment of the seat from the entry position to an unauthorized position misusing the large adjustment possibilities of a seat. In the<figref idrefs="f0006"><b>10a</b></figref> The second attachment 40 is provided in a released position, ie, the backrest part 2 and the seat part 3 can be folded forward about an axis of rotation lying in the region of the first attachment 20. If, in this situation, the backrest part 2 is erected (cf.<figref idrefs="f0006"><b>10b</b></figref>) - the trigger 21 being switched off - and subsequently being adjusted again into its folding position (cf. <figref idrefs="f0006"><b>10c</b></figref>) - the release means 21 is actuated again by the actuating part 23 and an unlocking or a solution of the diagonal fastening 30 is initiated by the control 10, it is possible that by the solution of the diagonal fastening 30 (cf. <figref idrefs="f0006"><b>10d</b></figref>), A longitudinal displacement of the diagonal attachment 30 is conceivable despite the second attachment 40, which is naturally not fastened in the entry position. Such an abuse of the adjustment possibilities is prevented according to the invention in that the second monitoring means 40 are fitted with the second monitoring means 41, which are actuated by the release of the second fastening means 40 in the entry position and, when actuated, a solution of the diagonal fastening 30, First actuator 32.

p0024In <figref idrefs="f0006"><b>FIG</b></figref> is that in <figref idrefs="f0006">FIG</figref> In a seat 1 according to the invention is again shown on the basis of a logic diagram. In<figref idrefs="f0006">FIG</figref> Three lines are shown which represent states of different components of the seat 1 according to the invention. Each line represents the time profile t of the state of the respective component. The designation "0" means that the corresponding component is inactive or not activated. The first row relates to the triggering means 21, the second row relates to the second actuator 42, and the third row relates to the second monitoring means 41. At a fourth time t4, the backrest is adjusted by mechanical unlocking of the backrest part 2. As a result, the backrest part 2 is adjusted to its folded position. When the folding position is reached, the triggering means 21 is activated (by means of the actuating part 23), which is the case at the fifth time point t5. By actuation of the release means 21, the control 10 activates the second actuator 42 during a predetermined time interval T of, for example, 500 ms, in order to enable the entry position to be reached. When the second actuator 42 has released the adjustment bracket 44 of the second mounting 40, the second monitoring means 41 is activated at the fourth time t6. The control is now provided according to the invention in such a way that a subsequent activation of the first actuator 32 is omitted as long as the second monitoring means 41 signals an unlocking of the second mounting 40 and this also applies to the case where the triggering means 21,<figref idrefs="f0006">FIG</figref> Is actuated again and, in principle, could cause the diagonal fastening 30 to be released by activation of the first actuator 32.

p0025According to the invention, the triggering means 21 and the monitoring means 31, 41 are provided in particular as contact switches or as microswitches, which are mechanically switched by the movement of certain components. The actuation part 23 for actuation of the triggering means 21 is arranged for these components. In this case, it can be provided in particular that a part of the triggering or monitoring means 21, 31, 41 perform a monitoring of the state, while others monitor the changes. For example, it is provided according to the invention that the triggering means 21 reacts to "flanks" or is evaluated by the control means 10 on "flanks" of its signal, while the first and second monitoring means 31, 41 react only to detected or assumed states, Can be evaluated by the control device 10 exclusively for instantaneous signals. From the latter, the advantage is obtained that the evaluation of the monitoring means 31, 41 is independent of the movement history of the seat and thus an increased robustness of the system, for example in the case of power failures, is provided.

p0026The distinction between the setting of the retracted position or the entry position outgoing from the normal position can also be effected by providing a selector switch (not shown) whose one setting possibility is for the adjustment of the retracted position and whose other adjustment possibility is for the adjustment of the starter position. As a result, a user of the seat according to the invention can set these two positions unambiguously and separately or initiate their setting.

Reference list:

p0027<dl id="dl0002" compact="compact"><dt>1</dt><dd>seat</dd><dt>2</dt><dd>Backrest part</dd><dt>3</dt><dd>Seat part</dd><dt>3b</dt><dd>Side part of the seat part</dd><dt>4</dt><dd>Seat substructure</dd><dt>10</dt><dd>control</dd><dt>20</dt><dd>first attachment</dd><dt>21</dt><dd>Release agent</dd><dt>30</dt><dd>Diagonal mounting</dd><dt>31</dt><dd>first monitoring means</dd><dt>32</dt><dd>first actuator</dd><dt>34</dt><dd>Adjustment bracket for diagonal mounting</dd><dt>40</dt><dd>second attachment</dd><dt>41</dt><dd>second monitoring means</dd><dt>42</dt><dd>second actuator</dd><dt>43</dt><dd>actuators</dd><dt>44</dt><dd>Adjustment bracket of the second attachment</dd><dt>t</dt><dd>time course</dd><dt>t1</dt><dd>first time</dd><dt>t2</dt><dd>second time</dd><dt>t3</dt><dd>third time</dd><dt>t4</dt><dd>fourth time</dd><dt>t5</dt><dd>fifth time</dd><dt>t6</dt><dd>seventh time</dd><dt>T</dt><dd>time interval</dd></dl>