Motor vehicle seat

Abstract

A motor vehicle seat is described, comprising a seat section (3), a backrest (5), and a frame (7) for securing the backrest (5). The backrest (5) can be attached to and / or removed from the frame (7) without tools.

Description

Technical field

[0001] The invention relates to a motor vehicle seat, in particular for a passenger car or a light commercial vehicle. State of the art

[0002] Modern car seats are often complex systems with many components, which, due to their considerable weight, reduce the range of electric vehicles. However, for sustainability reasons and to conserve resources, it can be desirable to initially purchase a basic seat that can be retrofitted with additional components. If a customer identifies a need, they can purchase further modules from the basic seat to increase comfort or customize it to their preferences, for example, by adding a different colored fabric cover, electric seat or backrest heating, or a different backrest design. However, car seats are generally monolithic and do not allow for subsequent modifications.

[0003] German patent DE 102023202971.5 describes a motor vehicle seat with a backrest formed as a molded plastic part, which can be retrofitted with additional components if required. The backrest is permanently connected to the seat base. Description of the invention

[0004] It is an object of the present invention to provide a motor vehicle seat which can be easily modified by the customer according to their wishes after purchase of the associated motor vehicle.

[0005] This task is solved using independent claims. Advantageous further developments are specified by the characteristics of dependent claims.

[0006] According to a first aspect of the invention, a motor vehicle seat, particularly for a passenger car or a light commercial vehicle, is proposed, comprising a seat section, a backrest, and a frame for securing the backrest. The backrest can be attached to the frame and / or removed from it without tools, particularly without hand tools.

[0007] This solution allows for particularly easy assembly and disassembly of the backrest without tools or hand tools, i.e. without screwdrivers, hammers, Allen keys or the like, and thus allows the backrest to be assembled or disassembled using only the hands.

[0008] As an alternative to the above proposal, but also conceivable as an embodiment of the above proposal, a motor vehicle seat is proposed comprising a seat part, a backrest and a frame for fixing the backrest, in which the backrest is attached to the frame with at least one fastener, in particular a manually openable fastener.

[0009] This alternative or design also allows for easy modification of the vehicle seat after purchase of the vehicle, because the connection between the frame and the backrest is detachable, allowing the backrest to be installed and removed without damage.

[0010] The locking mechanism can consist of a first locking part attached to the frame and a corresponding second locking part fixed to the backrest. In particular, the locking mechanism is a latch lock and may, for example, have a rotary latch.

[0011] In another embodiment, the backrest has at least one second locking element on its rear side.

[0012] Furthermore, the backrest can be designed as a shell-shaped molded plastic part, the back of which has at least one second locking element.

[0013] The second locking element can be a bolt, in particular an L-shaped bolt. If the backrest is made of plastic, at least on its reverse side, as is the case, for example, with a molded plastic part, one end of the second locking element can be bonded to the plastic. In this case, it may be connected to an internal, e.g., metallic, reinforcing structure of the backrest to increase the mechanical stability of the bolt anchorage.

[0014] In another embodiment, the first locking element has an opening into which the second locking element can be inserted and clamped. Clamping closes the closure, or places it in the closed position. The opening can be located in a recess of the first locking element, for example, a recess in its outer casing, particularly the housing, which facilitates the insertion of the second locking element into the opening.

[0015] Furthermore, the first locking element may have a rotatable locking arm or a snap for clamping the second locking element. The locking arm or snap can be clamped by the action of a spring, for example, located on the axis of rotation, thus causing the locking mechanism to close.

[0016] In one embodiment, the backrest is attached to the frame by at least one self-locking fastener.

[0017] Another embodiment provides a Bowden cable to lock and / or unlock the closure.

[0018] The last two examples of this design further simplify the assembly and disassembly of the backrest from or on the frame.

[0019] In a further embodiment, the locking arm has a visually detectable indicator, particularly one visible from outside the first locking part, such as a color marking or a symbol, that signals the closure of the lock. For visual detection, the housing of the first locking part can have an opening, such as a cutout, a slot, or a hole. In this context, closure means that the second locking part is clamped.

[0020] In a further embodiment, there is a Bowden cable which is connected to the first locking part, in particular to its locking arm, in such a way that by pulling, in particular by electromechanical pulling, the Bowden cable moves the lock from a closed position, in which the second locking part is clamped or the lock is closed, to an open position, in which the second locking part is not clamped.

[0021] In a second aspect of the invention, a backrest for a motor vehicle is proposed, wherein the motor vehicle seat has a frame for securing a backrest. On its rear side, a second locking element is attached for engaging a locking connection with a corresponding first locking element of the frame.

[0022] A backrest of this type can be provided as a separate purchase component for the motor vehicle seat and optimized for people of different sizes and / or builds in order to increase seating comfort.

[0023] The invention will now be explained in more detail using an exemplary embodiment and figures not drawn to scale. Fig. 1 a motor vehicle seat according to the invention; Fig. 2 the motor vehicle seat of the Fig. 1 without backrest; Fig. 3 a first locking part in a first position (open position); Fig. 4 the first locking part of the Fig. 3 in a second position (closed position);

[0024] Fig. Figure 1 shows a motor vehicle seat 1 for a passenger car with a seat section 3 and a shell-shaped backrest 5 made of molded plastic. The backrest 5 is fixed to a metal frame 7.

[0025] The three-dimensional coordinate system shown, as in the following figures, indicates how the vehicle seat 1 is installed in the car. A seated person facing forward in the -x direction, the y-direction refers to the vehicle's transverse direction, and the z-direction, as usual, to the vehicle's vertical axis.

[0026] The vehicle seat 1 is very simple and represents a basic seat that can be supplemented by the vehicle owner after purchase of the corresponding vehicle with further components, e.g. a seat cushion with or without seat heating, a headrest, upholstery parts for the backrest 3 or even just a fabric cover for the backrest 3. To accomplish this, it may be useful, for example to attach a fabric cover for the backrest 3, to remove it and then reinstall it later.

[0027] Fig. Figure 2 shows the same vehicle seat 1 as Fig. 1, but without a backrest. It can be seen that a total of four first locking parts 9, 9', 9'', 9''' are attached to the frame 7, which are connected to four corresponding second locking parts (in Fig. 2 (not shown), the backrest 5 interact and form a locking mechanism. The four locking mechanisms securely fix the backrest 5 to the frame 7, ensuring that the backrest 5 remains reliably upright in its installed position in the vehicle, even during hard braking while driving forward (in the -x direction).

[0028] Fig. Figure 1 shows the front of the backrest 5, which, when used in a motor vehicle, comes into contact with the back of the driver or front passenger. The four secondary locking parts 17 (not shown) are located on the rear of the backrest 5, facing away from the viewer. They are L-shaped metallic bolts, one part of which is cast into the plastic molded part. There, it is connected to an internally arranged reinforcing structure. The second part of the metallic bolt, located outside the backrest, is oriented in the y-direction.

[0029] Fig. Figure 2 further shows that cables 27 of a Bowden cable 11 are attached to the four first locking parts 9, 9', 9'', 9'''. This cable is accessible from the rear of the frame 7 and serves to open the locks for the purpose of removing the backrest. Pulling the handle 13 downwards (in the -z-direction) opens the two upper locks 9, 9', and pulling it upwards (in the z-direction) opens the two lower locks 9'', 9''', thus allowing the backrest to be removed. Disassembly is therefore non-destructive, simply by pulling the handle 13 by hand, without the need for additional (hand) tools such as screwdrivers, etc., and is thus tool-free.

[0030] Fig. Figure 3 shows a first locking element 9 viewed perpendicular to the xz plane, i.e., in the transverse direction of the vehicle. The first locking element 9 has a slot-like opening 15 into which a second locking element 17, here designed as a bolt, can be inserted and clamped during the assembly of the backrest. This occurs when a person sitting in the vehicle's seat pushes against the backrest, thus slightly moving the backrest in the x-direction.

[0031] The first locking element 9 has a locking arm 19 that can rotate about a pivot axis 21 and has a spring-loaded locking arm 23. A spring 25 is located on the pivot axis 21 of the locking arm 19. The spring 25 pushes the locking arm 23 clockwise, or in the direction of arrow P, and initially against a spring-loaded retaining bolt 27 equipped with a point. If the second locking element 17 is now moved further in the x-direction within the opening 15, the locking arm 23 slides along the flank of the point. After passing the point itself, the spring 25 moves the locking arm 19 further forward in a clockwise direction until the Fig. The position shown in Figure 4 has been reached. In this position, it can be seen that the pivoted locking arm 23 now clamps the second locking part 17 of the backrest 5 at the end of the opening 15. The lock is thus in the closed position.

[0032] Pulling the cable 29 releases the spring-loaded locking bolt 31, which slides axially into the opening 15 until it reaches the position shown by the dashed line. This also locks the clasp. In this way, it reliably secures the position of the locking arm 23 against counterclockwise rotation.

[0033] The first locking element 9 has an opening extending in the y-direction (not shown) and an inner wall that is at least partially red. The red area is positioned such that a red area is visible when looking through the opening. Alternatively, another component inside the first locking element 9, e.g., a ridge or rib projecting from the inner wall, can be red in a certain area on the side facing the opening and be visible when looking through the opening.

[0034] The locking arm 23 has a visually perceptible indicator 28 at its end, which in this case is a green color marking. When the locking arm 23 is moved from the position in the backrest assembly, the indicator 28 is visible at its end. Fig. The position shown in 3 (open position) gradually transitions into that of the Fig. 4 (closed position), the locking arm 23 of the first locking part 9 increasingly slides between its red inner wall and its opening for detecting the indicator 28. The indicator 28 faces the aforementioned opening 15 and is positioned on the locking arm 23 in such a way that it is only fully visible through the opening when the closed position is reached. Thus, the indicator 28 signals a closed closure, whereas if the indicator 28 is absent, the closure is not closed. If the indicator 28 is a color marking, it is particularly easy to reliably verify whether the safety-critical closure has been achieved. The use of a color, similar to a traffic light, prevents the user from correctly assessing the closed status.

[0035] Conversely, to remove the backrest from the frame, one pulls on the handle 13 of the Bowden cable 11. The cables 29 of the Bowden cable 11 are attached once to the attachment point 31 of the locking arm 23 and additionally to the locking bolt 31. Since one does this, see Fig.1. Pulling the first locking part 9'' or 9''' located at the bottom of the frame in the z-direction causes the locking arm 23 to rotate counterclockwise, thus ending the clamping of the second locking part 17. Simultaneously, the locking bolt 31 is retracted inside the lock, so that the second locking part 17 is pulled out of the opening 15 and away from the frame by pulling the backrest in the -x-direction. For the two first locking parts 9 and 9' located at the top of the frame, the first locking part 9 or 9'' is pulled in the -z-direction. In this case, the first locking part 9 or 9'' is rotated 180° around an axis running in the x-direction compared to the locking parts 9'' and 9''', respectively. For example, the locking bolt 31 is then located at the top of the first locking part 9. Reference symbol list 1 motor vehicle seat 3 Seat section 5 Backrest 7 frames 9, 9' first locking part 9'', 9''' first locking part 11 Bowden cable 13 Handle part 15 Opening 17 second locking part 19 Locking arm 21 axis of rotation 23 Locking arm 25 springs 27 retaining bolts 29 rope 28 visually perceptible indicators 31 locking bolts 33 Mounting point QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 102023202971.5

[0003]

Claims

[1] Motor vehicle seat, comprising a seat part (3), a backrest (5) and a frame (7) for securing the backrest (5), characterized by that the backrest (5) can be attached to the frame (7) without tools and / or removed from it without tools. [2] Motor vehicle seat according to claim 1, wherein the backrest (5) is fastened to the frame (7) by means of at least one closure (9, 9', 9'', 9''', 17), which is formed from a first closure part (9, 9', 9'', 9''') fastened to the frame (5) and a second closure part (17) corresponding thereto and fixed to the backrest (5). [3] Motor vehicle seat according to claim 1 or 2, wherein the backrest (5) has at least one second closure part (17) on its rear side. [4] Motor vehicle seat according to one or more of the preceding claims, in which the backrest is designed as a shell-shaped plastic molded part. [5] Motor vehicle seat according to one or more of the preceding claims, in which the first closure part (9, 9', 9'', 9''') has an opening (15) into which the second closure part (17) can be inserted and clamped there. [6] Motor vehicle seat according to claim 4, wherein the first closure part (9, 9', 9'', 9''') has a rotatable closure arm (19) for clamping the second closure part (17). [7] Motor vehicle seat according to one or more of claims 1 to 5, wherein the closure (9, 9', 9'', 9''', 17) is self-locking and / or has a Bowden cable (11) for locking the closure (9, 9', 9'', 9''', 17). [8] Motor vehicle seat according to claim 6, wherein the locking arm (19) has a visually detectable indicator (33) which signals a correct closure of the lock (9, 9', 9'', 9''', 17). [9] Motor vehicle seat according to claim 7, with a Bowden cable (11) which is connected to the first closure part (9, 9', 9'', 9'''), in particular to its closure arm (19), in such a way that by pulling on the Bowden cable (11) the closure (9, 9', 9'', 9''', 17) is transferred from a closed position in which the second closure part (17) is clamped into an open position in which the second closure part (17) is not clamped. [10] Backrest (5) for a motor vehicle seat, wherein the motor vehicle seat has a frame (5) for securing a backrest (5), with a second closure part (17) attached to its rear side for entering into a locking connection with a corresponding first closure part (9, 9', 9'', 9''') of the frame (5).

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