Roller

Abstract

The invention relates to a roller for a roller guide, arranged in particular in a vehicle seat base, comprising a first sub-element having a rolling surface and a second sub-element forming a support for a bearing element, the first portion is at least partially surrounded by the first sub-element such that a positive lock is formed between the first sub-element and the second sub-element.

Description

Technical Field

[0001] The invention relates to a roller, in particular for a vehicle seat base, comprising a first sub-element having a rolling surface and a second sub-element forming a support for a bearing element. Background Art

[0002] Vehicle seats, in particular vehicle seats for commercial vehicles, comprise a seat base which is arranged between a vehicle seat upper part and a vehicle seat lower part. Such a vehicle seat base can have a scissor-type frame. In order to be able to move during compression or rebound, the scissor-type frame usually comprises a fixed bearing and a floating bearing. Such a floating bearing also comprises a roller guide with corresponding rollers. These rollers are arranged on bearing elements or bearing pins and roll in tracks. The rollers should have good rolling properties and generate low friction losses.

[0003] Solid rollers made of a single material are known in the prior art. However, since the requirements of the material when interacting with the running rail are different from the requirements when interacting with the bearing element or the bearing pin, compromises are usually required when selecting the material to meet these conflicting requirements. Summary of the invention

[0004] The object of the present invention is to provide a roller for a vehicle seat base or a vehicle seat which overcomes the above-mentioned disadvantages.

[0005] This object is achieved by a roller according to the invention.

[0006] The core idea of ​​the invention is a roller, in particular for a vehicle seat base, comprising a first subelement having a rolling surface, and a second subelement forming a support for a bearing element, wherein the second subelement has a first portion which is at least partially surrounded by the first subelement so that a positive locking is formed between the first subelement and the second subelement.

[0007] The roller according to the invention is preferably suitable and intended for use in a roller guide or a floating bearing of a vehicle seat base.

[0008] The invention enables the first sub-element to be optimized with respect to the requirements for good rolling properties in the guide rail. Likewise, the second sub-element can also be optimized with respect to the interaction with the bearing element, for example a bearing pin. The positive locking between the first sub-element and the second sub-element provides a mechanically stable and uniform roller. For example, it is not necessary to provide other types of connections, such as a material connection between the first sub-elements.

[0009] According to a preferred embodiment, the first subelement and the second subelement are made of different materials. Preferably, the material of the first subelement is selected to have a higher coefficient of friction than the material of the second subelement. This coefficient of friction, also known as friction coefficient, is a parameter of the ratio of the friction force to the contact pressure between two objects. It is advantageous for the material of the first subelement (including the rolling surface) to have a high coefficient of friction. Such a high coefficient of friction leads to good rolling properties, because the sliding of the roller in the track is reduced.

[0010] However, for the second sub-element, a lower coefficient of friction is desirable, since the second sub-element preferably rotates around the bearing element or the bearing bolt.In order for the roller to run smoothly, the friction between the roller and the bearing element should be reduced as much as possible.

[0011] Preferably, the two materials of the first sub-element and the second sub-element have different hardnesses. Preferably, the material of the second sub-element has a greater hardness than the material of the first sub-element. With this advantageous design, the mechanical stability of the roller can be substantially ensured by the second sub-element.

[0012] According to another preferred embodiment, the first subelement and the second subelement are made of different plastics. Preferably, the roller is manufactured by a multi-component injection molding process. Due to the positive locking according to the invention, the mechanical stability of the roller is ensured without material bonding between the two components of the injection molding process. Therefore, the choice of plastic is not limited to those plastics that form material bonds during the injection molding process.

[0013] According to a preferred embodiment, there is no material-to-material bond between the first subelement and the second subelement. However, the object of the present invention is not intended to be limited to such a situation where there is no material bond. On the contrary, it should be emphasized that such a bond is generally not required.

[0014] Therefore, embodiments are also conceivable in which there is a material bond between the first sub-element and the second sub-element. The material-material bond can be formed, for example, by material joining during an injection molding process. However, the material-material bond can also be an adhesive bond or a welded bond.

[0015] An economical injection molding process requires that the wall thickness of the manufactured components is as thin as possible. In order to ensure a high load-bearing capacity of the roller, it is advantageous for the outer diameter of the roller to be as large as possible. For low friction losses and good rolling properties, it is advantageous for the support for the bearing element or the bearing pin and therefore the bearing element itself to have a diameter that is as small as possible. These requirements lead to a large difference between the inner diameter (radius of the support) and the outer diameter of the roller. Therefore, it is necessary to use the injection molding process to manufacture components with very large wall thicknesses. However, such production requires long cycle times and is therefore economically disadvantageous. By designing the roller according to the invention to have a first sub-element and a second sub-element, the two sub-elements can be designed so that their structure advantageously has a low constant wall thickness. Therefore, the cycle time required to manufacture the roller according to the invention is shorter and it is therefore more economical to manufacture.

[0016] Rollers with larger roller diameters can also be manufactured in an economical manner. A large roller diameter improves roller performance. Preferably, the diameter of the roller (outer diameter) is in the range of 27 mm to 33 mm, preferably in the range of 30 mm to 32 mm, more preferably 31 mm. Preferably, the diameter of the support of the bearing element is in the range of 11 mm to 14 mm, preferably in the range of 11 mm to 13 mm, more preferably 12 mm.

[0017] Preferably, the first sub-element and the second sub-element have a constant wall thickness, while the diameter (outer diameter) of the roller is in the range of 27 mm to 33 mm, preferably in the range of 30 mm to 32 mm, more preferably 31 mm.

[0018] Preferably, the roller is cylindrical in shape. Advantageously, the roller thus has an extension along a radial axis (R) and another extension along a height axis (H). The rolling surface extends along a circumferential direction (U) of the roller. The first subelement is preferably located further outwards along the radial axis (R) of the roller than the second subelement.

[0019] According to another preferred embodiment, the roller comprises a central axis (M) extending along the height axis (H). Preferably, the roller has a radial section axis (S) extending along the radial axis (R). Preferably, the radial section axis (S) extends perpendicular to the central axis (M). Preferably, the intersection of the radial section axis (S) and the central axis (M) is located at half the height extension of the roller along the height axis (H).

[0020] According to another preferred embodiment, the second subelement is symmetrical with respect to the radial section axis (S). Preferably, the first portion of the second subelement is symmetrical with respect to the radial section axis (S). Such a symmetrical design ensures a balanced rolling performance of the roller.

[0021] According to another preferred embodiment, the second subelement has a second part in the shape of a hollow cylinder. Preferably, the second part forms a support for a bearing element or a bearing pin. Therefore, the bearing element can advantageously be arranged on the support. The support is preferably designed as a continuous hole extending along the height axis (H) of the hollow cylindrical second part. However, as an alternative, the support can also be a hole that is not completely penetrated along the height axis (H). Preferably, the second part forms an inner surface around the support or the hole in the circumferential direction (U) of the roller. Preferably, the inner surface is in contact with the bearing element. Advantageously, the roller rotates around the fixed bearing element. Therefore, it is advantageous to minimize the friction between the inner surface of the second part and the bearing element. However, embodiments of the shaft-hub connection providing a friction connection between the roller or the second subelement of the roller and the bearing element should not be excluded. For this purpose, the bearing element is usually rotatably mounted on another element.

[0022] According to another preferred embodiment, the height extension of the second part of the second subelement substantially corresponds to the height extension of the roller.Thus, the second part of the second subelement advantageously extends to the entire height of the roller.

[0023] According to another preferred embodiment, the first part of the second subelement has an outer sub-portion extending in the circumferential direction (U) of the roller. Preferably, the outer sub-portion comprises an upper surface extending substantially parallel to the rolling surface of the first subelement. Preferably, the upper surface is arranged along the radial axis (R) of the roller closer to the central axis (M) of the roller than the rolling surface.

[0024] According to another advantageous embodiment, the outer sub-portion is substantially hollow cylindrical. Preferably, the extension of the outer sub-portion along the height axis (H) of the roller is smaller than the hollow extension of the roller. Advantageously, the first sub-element at least partially, preferably completely surrounds the outer sub-portion of the second sub-element.

[0025] According to another advantageous embodiment, the outer sub-portion is connected to the second part via a connecting sub-portion of the first part. Preferably, the connecting sub-portion extends along the radial axis (R). Advantageously, the extension of the connecting sub-portion along the height axis (H) is less than the extension of the outer sub-portion. The connecting sub-portion is preferably mesh-shaped. Preferably, the connecting sub-portion and the outer sub-portion adopt an integral or one-piece design. Here and below, an one-piece design is understood to mean that all parts are made of a unified single component. This is different from an one-piece design in which, although all parts are not made of a unified single component, they are not only firmly connected to each other, but also so tightly connected that they do not seem to be made up of multiple components connected together, and in any case cannot be separated from each other without destroying them.

[0026] According to a preferred embodiment, the connecting sub-portion and the outer sub-portion of the second sub-element form a first portion of the second sub-element. Preferably, the cross section of the first portion is approximately T-shaped. Preferably, the first portion and the second portion of the second sub-element form an approximately H-shaped cross section. This design ensures the mechanical stability of the roller by the first sub-element on the one hand and the positive locking between the first sub-element and the second sub-element on the other hand.

[0027] According to another preferred embodiment, at least one intermediate subsection is arranged between the outer subsection and the second section along the radial axis (R). Preferably, the design of the at least one intermediate subsection is substantially the same as the outer subsection. Furthermore, it is advantageous that the outer subsection is connected to the at least one intermediate subsection via a connecting subsection. Preferably, the at least one intermediate subsection is also connected to the second section of the second subelement via a connecting subsection. Preferably, the first subelement surrounds the at least one intermediate subsection, the outer subsection and the at least one connecting subsection. This forms more intermediate spaces, which are filled by the first subelement, thereby ensuring an improved positive locking.

[0028] According to another preferred embodiment, the first subelement comprises a rolling subsection extending in the circumferential direction (U) of the roller, the rolling subsection having said rolling surface. Preferably, the rolling subsection is at least partially arranged on the upper surface of the first subelement.

[0029] According to another preferred embodiment, the first subelement is provided with at least one pair of engagement portions, which are opposite to each other along the height axis (H). Preferably, the pair of engagement portions are separated from each other by a connecting sub-portion of the second subelement. Advantageously, each engagement portion extends in each case along a radial axis (R) between an outer sub-portion and a second portion of the second subelement, or between an outer sub-portion and a middle sub-portion, or between a middle sub-portion and a second portion of the second subelement, or between two middle sub-portions.

[0030] Preferably, the second subelement or the first part of the second subelement therefore comprises at least one connecting subpart of the first part.

[0031] According to another preferred embodiment, at least the rolling sub-portion, the engagement portion and the outer sub-portion have substantially the same wall thickness.Preferably, the wall thickness of the rolling sub-portion, the engagement portion and the outer sub-portion extends along the radial axis (R) of the roller.

[0032] Preferably, at least the rolling subsection, the engagement section, the outer subsection and the at least one intermediate subsection have substantially the same wall thickness. Preferably, the wall thickness of the rolling subsection, the engagement section, the outer subsection and the at least one intermediate subsection extends along a radial axis (R).

[0033] Preferably, at least the rolling subsection, the engagement section, the outer subsection and the at least one connecting subsection have substantially equal wall thicknesses. Preferably, the wall thicknesses of the rolling subsection, the engagement section, the outer subsection and the at least one intermediate subsection extend along a radial axis (R). Preferably, the wall thickness of the at least one connecting subsection extends along a height axis (H).

[0034] Preferably, at least the rolling subsection, the engagement section, the outer subsection, the at least one intermediate subsection and the at least one connecting subsection have substantially equal wall thicknesses. Preferably, the wall thicknesses of the rolling subsection, the engagement section, the outer subsection and the at least one intermediate subsection extend along a radial axis (R). Preferably, the wall thickness of the at least one connecting subsection extends along a height axis (H).

[0035] Since the various components of the roller have substantially equal wall thicknesses, the cycle time in the injection molding process for manufacturing the roller can be shortened or optimized.Thus, in comparison with solid rollers of the prior art, it is advantageous to manufacture a roller comprising several components in the form of two first sub-elements with defined wall thicknesses.

[0036] According to another preferred embodiment, the second part of the second subelement has two opposite end regions along the height axis (H). Preferably, each end region is stepped. Advantageously, the steps point outwards. Preferably, the first subelement abuts against the stepped end regions. This design improves the positive locking between the first subelement and the second subelement.

[0037] The object is also solved by a vehicle seat base with a roller guide, the roller guide comprising at least one roller according to at least one embodiment described above. The vehicle seat base can have all the features already described above in the context of the roller, either individually or in combination with each other, and vice versa.

[0038] The object is also achieved by a vehicle seat which is equipped with a vehicle seat base as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other advantages, purposes and features of the present invention are described in the following description with reference to the accompanying drawings. In various embodiments, similar components are marked with the same reference numerals.

[0040] It shows:

[0041] Figure 1 is a perspective view of an embodiment of a roller;

[0042] Figure 2 is a side view of an embodiment of a roller;

[0043] Figure 3 To correspond to Figure 2 A cross-sectional view of the roller along the section line BB;

[0044] Figure 4 For the corresponding Figure 2 A cross-sectional view of the roller along the section line CC;

[0045] Figure 5 is a cross-sectional view of a roller according to an embodiment;

[0046] Figure 6 is a cross-sectional view of a roller according to an embodiment;

[0047] Figure 7 is a cross-sectional view of a roller according to an embodiment;

[0048] Figure 8 is a cross-sectional view of a roller according to an embodiment;

[0049] Fig. 9 is a perspective view of a vehicle seat base; and

[0050] Fig.10 A front view of the vehicle seat base. DETAILED DESCRIPTION

[0051] Figures 1 to 8 A roller 1, in particular for a vehicle seat base (100), is shown. The roller 1 comprises a first subelement 2 with a rolling surface 3 and a second subelement 4 forming a support 5 for a bearing element 102, wherein the second subelement 4 has a first portion 6 which is at least partially surrounded by the first subelement 2 so that there is a positive locking between the first subelement 2 and the second subelement 4.

[0052] The first sub-element 2 and the second sub-element 4 are preferably made of different materials. The material of the first sub-element 2 advantageously has a large friction coefficient to ensure good rolling properties. The material of the second sub-element 4 advantageously has a large hardness to ensure the mechanical stability of the roller 1. In addition, the material of the second sub-element 4 has a low friction coefficient to minimize the friction between the bearing element 102 in the form of a bearing pin and the second sub-element. Advantageously, the roller 1 is manufactured using a multi-component injection molding process.

[0053] Figure 1 Various embodiments of the roller 1 are shown in perspective views from above. Figure 2 A corresponding side view of the roller 1 is shown.

[0054] The roller 1 is substantially cylindrical. This means that the roller 1 extends along a height axis H and a radial axis R. Furthermore, a circumferential direction U is defined which extends along the circumference of the circular base surface.

[0055] The roller 1 also has a central axis M, which extends along the height axis H. Furthermore, a radial section axis S of the roller 1 can be defined, which extends along the radial axis R of the roller 1. The intersection point SP of the radial section axis S and the central axis M is located at half the height extension of the roller 1, so that the radial section axis S is perpendicular to the central axis M. The first portion 6 of the second subelement 4 is symmetrical with respect to the radial section axis S.

[0056] The second sub-element 4 has a second portion 7 which is in the form of a hollow cylinder. Therefore, the second portion 7 has a hole which serves as a support 5 for the bearing element 102. The second portion 7 has an inner surface 7a which is in contact with the bearing element 102.

[0057] Furthermore, the height extension of the second portion of the second subelement corresponds to the height extension of the roller 1. This means that the second portion extends along the entire height of the roller 1.

[0058] Figure 1 The roller 1 is shown to have two side faces 15. The two side faces 15 are opposite each other along the height axis H. Furthermore, the side faces 15 are respectively formed by the front surface 7b of the second portion 7 of the second subelement 4 and the front surface 2a of the first subelement 2. The respective front surfaces 7b, 2a are adjacent to each other and form a flat front surface 15.

[0059] Figures 3 to 8 The structure of the roller 1 is shown. Figures 5 to 8 In particular, the second sub-element 4 and the structure of the surrounding first sub-element 2 are shown. Figure 5 , Figure 6 , Figure 7 , Figure 8 Different designs of the second subelement 4 are shown.

[0060] according to Figures 5 to 8 In each embodiment of the present invention, the first portion 6 of the second subelement 4 comprises an outer subsection 8 extending in the circumferential direction U of the roller 1. The outer subsection 8 has an upper surface 9 extending substantially parallel to the rolling surface 3 of the first subelement 2. Furthermore, the upper surface 9 is closer to the central axis M of the roller 1 than the rolling surface 3 along the radial axis R of the roller 1.

[0061] The outer subsection 8 is substantially hollow cylindrical and is integrated with the connecting subsection 10. The cross section of the outer subsection 8 is substantially rectangular. In addition, the extension of the outer subsection 8 along the height axis H of the roller 1 is smaller than the height extension of the roller 1. The outer subsection 8 is arranged in the center of the roller 1 along the height axis H.

[0062] The connecting subsection 10 is also arranged centrally with respect to the extension of the roller 1 along the height axis H. Likewise, the connecting subsection 10 is also arranged centrally with respect to the outer subsection 8 along the height axis H. The outer subsection 8 and the connecting subsection 10 together have a substantially T-shaped cross section and are also arranged symmetrically with respect to the radial section axis S. The first subelement 2 at least partially surrounds the outer subsection 8. The first subelement 2 surrounds the outer subsection 8 except for the region where the connecting subsection 10 merges.

[0063] according to Figure 5 , Figure 6 and Figure 7 In the embodiment of the present invention, the connecting sub-portion 10 is integrated with the second portion of the second sub-element 4. The connecting sub-portion 10 thus connects the outer sub-portion 8 with the second portion 7 and extends along the radial axis R of the roller 1. The roller 1 thus comprises at least one connecting sub-portion 10.

[0064] Figure 8 Another embodiment is shown in which at least one intermediate subsection 11 is arranged between the outer subsection 8 and the second section 7 along the radial axis R of the roller 1. According to this advantageous embodiment, two intermediate subsections 11 are provided. The intermediate subsections 11 are substantially identical to the outer subsections 8, i.e. they are also substantially rectangular in cross section and merge radially inwardly into the connecting subsection 10. Each connecting subsection 10 extends along the radial axis R and is centered along the height axis H.

[0065] The middle subsection 11 extends along the height axis H to the same extent as the outer subsection 8 and is also centrally arranged in the same manner as the outer subsection 8 relative to the radial section axis S. Therefore, the middle subsection 11 and the connecting subsection 10 thereon also have a substantially T-shaped cross section.

[0066] according to Figure 8 In the embodiment shown, three connecting sub-parts are provided. The first connecting sub-part 10 connects the outer sub-part 8 with the first middle sub-part 11. Another connecting sub-part 10 connects the first middle sub-part 11 with the second middle sub-part 11. The third connecting sub-part 10 connects the second middle sub-part 11 with the radially innermost second part 7. The structure formed by this has three adjacent T-shaped cross-sections. This configuration results in spaces between the outer sub-part 8 and the middle sub-part, between the middle sub-parts, and between the second part and the middle sub-part 11. These spaces are filled by the first sub-element 2.

[0067] The first sub-element 2 has a rolling sub-portion 12 extending in the circumferential direction U of the roller 1 , the rolling sub-portion 12 having a rolling surface 3 . The rolling sub-portion 12 is at least partially arranged on the upper surface 9 of the outer sub-portion 8 . Figures 5 to 8It is clearly shown that the rolling subsection 12 extends outside the outer subsection 8 along the height axis H. The rolling subsection 12 merges into a side section 16 on each side of the roller 1. These side sections 16 surround the side 15 or are delimited by the side 15. Starting from the side section 16, at least one engagement section 13 extends on the respective side of the second subelement 4. Thus, there is at least one pair of engagement sections 13, which are opposite each other along the height axis H and are separated by the connecting subsection 10. The engagement sections 13 are arranged in the aforementioned intermediate space.

[0068] according to Figure 5 , Figure 6 and Figure 7 In the embodiment of the present invention, there is a pair of engagement portions 13. Accordingly, one engagement portion 13 is arranged on each side between the outer sub-portion 8 and the second portion 7.

[0069] according to Figure 8 In the embodiment shown, a joining portion 13 is arranged on each side between the outer subsection 8 and the first middle subsection 11. Another pair of joining portions 13 is arranged between the first middle subsection 11 and the second middle subsection 11. Finally, a pair of joining portions 13 is provided between the second middle subsection 11 and the second portion 7.

[0070] At least one pair of engagement portions 13, rolling sub-portions 12 and side portions 16 form an integral first sub-element. Similarly, the first portion 6 (including the outer sub-portion 8, at least one connecting sub-portion 10) and the second portion 7 form an integral second sub-element 4. This can be done, for example, Figure 3 and Figure 4 Seen in.

[0071] according to Figure 7 In the embodiment shown, the wall thicknesses of the rolling sub-portion 12, the engaging portion 13, the outer sub-portion 8, the connecting sub-portion 10, the second portion 7 and the side portion 16 are substantially equal, wherein the wall thicknesses of the rolling sub-portion 12, the engaging portion 13, the outer sub-portion 8 and the second portion 7 extend along the radial axis R. The wall thicknesses of the connecting sub-portion 10 and the side portion 16 extend along the height axis H.

[0072] according to Figure 8 In the embodiment shown, the wall thicknesses of the rolling sub-portion 12, the engaging portion 13, the outer sub-portion 8, the connecting sub-portion 10, the intermediate sub-portion 11, the second portion 7 and the side portion 16 are substantially equal, wherein the wall thicknesses of the rolling sub-portion 12, the engaging portion 13, the outer sub-portion 8, the intermediate sub-portion 11 and the second portion 7 extend along the radial axis R. The wall thicknesses of the connecting sub-portion 10 and the side portion 16 extend along the height axis H.

[0073] Figure 5 and Figure 6In the embodiment shown, the second portion 7 of the second subelement 4 has two opposite end regions 14 along the height axis H. Each end region 14 has a stepped design, with the respective step protruding outwards. The first subelement 2 or the side portion 16 abuts against the stepped end region 14. The two end regions 14 include a central portion 17.

[0074] according to Figure 5 In the embodiment shown, the wall thicknesses of the rolling sub-portion 12, the engaging portion 13, the outer sub-portion 8, the connecting sub-portion 10, the central portion 17 and the side portion 16 are substantially the same, wherein the wall thicknesses of the rolling sub-portion 12, the engaging portion 13, the outer sub-portion 8 and the central portion 17 extend along the radial axis R. The wall thicknesses of the connecting sub-portion 10 and the side portion 16 extend along the height axis H.

[0075] and Figure 5 compared to, Figure 6 The wall thickness of the connecting sub-section 10 in the embodiment is greater. This is useful for greater load requirements. Figure 6 In the embodiment shown, the wall thicknesses of the rolling sub-portion 12, the engagement portion 13, the outer sub-portion 8, the central portion 17 and the side portions 16 are substantially equal, wherein the wall thicknesses of the rolling sub-portion 12, the engagement portion 13, the outer sub-portion 8 and the central portion 17 extend along the radial axis R. The wall thickness of the side portion 16 extends along the height axis H.

[0076] Fig. 9 and Fig.10 A vehicle seat base 100 is shown. It extends along a height axis Z, a width axis Y and a longitudinal axis X. The vehicle seat base 100 has a scissor frame 103, which connects the upper part of the vehicle seat with the lower part of the vehicle seat. The ends of the scissors of the scissor frame 103 are mounted on the one hand via a fixed bearing 104 and on the other hand via a floating bearing 105, in order to ensure that a pitching and rebounding movement is achieved. The floating bearing 105 comprises a roller guide 103. The roller guide 103 comprises a guide rail element 106, in which the roller 1 is arranged.

[0077] Fig.10 A bearing element 102 in the form of a bearing pin is shown, which passes through the roller 1 and is connected to a guide element 107. The guide element 107 comprises a surface which is inclined relative to the width axis Y. The guide element 106 comprises a portion which also extends at an angle relative to the width axis Y. The guide element 107 rests against this portion, so that the roller 1 is pushed up and can roll on the upper surface of the guide element 106.

[0078] All the features disclosed in the application documents are essential to the present invention as long as they are novel compared with the prior art either individually or in combination.

[0079] Reference numerals list 1 Scroll wheel 2 First subcomponent 2a Front surface of the first sub-element 3 Rolling surface 4 Second sub-element 5 Bracket 6 The first part of the second subelement 7 The second part of the second subelement 7a Inner surface 7b Front surface of the second sub-element 8 Outer sub-portion of the second sub-element 9 Upper surface of the outer part 10 Connector part of the first part 11. Middle subsection 12 Scrolling subsection 13 Joint 14 End Zone of the Second Section 15 Side 16 Side portion of the first subelement 17 Central part 100 Vehicle seat base 101 Roller guide 102 bearing elements 103 Scissor frame 104 Fixed bearing 105 Floating bearing 106 Guide rail components 107 Guide element H Height axis M Center axis S Radial section axis SP Intersection point of radial section axis S and center axis M R Radial axis U Circumferential direction X Longitudinal axis of vehicle seat base Y Width axis of vehicle seat base Z Height axis of the vehicle seat base.

Claims

1. A roller (1), in particular for a vehicle seat base (100), comprising a first subelement (2) having a rolling surface (3), and a second subelement (4) forming a support (5) for a bearing element (102), Features The second sub-element (4) has a first portion (6) which is at least partially surrounded by the first sub-element (2) so that a positive lock is formed between the first sub-element (2) and the second sub-element (4).

2. The roller (1) according to claim 1, It is characterized in that The first sub-element (2) and the second sub-element (4) are made of different materials, wherein the material of the first sub-element (2) is selected to have a higher friction coefficient than the material of the second sub-element (4), and the roller (1) is manufactured by a multi-component injection molding process.

3. The roller (1) according to claim 1 or 2, It is characterized in that The roller (1) comprises a central axis (M) extending along a height axis (H), wherein the roller (1) has a radial cross-sectional axis (S) extending along a radial axis (R) of the roller (1), wherein an intersection (SP) of the radial cross-sectional axis (S) and the central axis (M) is located at half of the height extension of the roller (1), wherein the first portion (6) of the second subelement (4) is symmetrical with respect to the radial cross-sectional axis (S).

4. Roller (1) according to one of the preceding claims, It is characterized in that The second subelement (4) has a second part (7) which is designed as a hollow cylinder and forms the support (5) for the bearing element (102), wherein the second part (7) of the second subelement (4) has a height extension which substantially corresponds to the height extension of the roller (1).

5. Roller (1) according to one of the preceding claims, It is characterized in that The first portion (6) of the second sub-element (4) has an outer sub-portion (8) extending along the circumferential direction (U) of the roller (1), and has an upper surface (9), wherein the upper surface (9) extends substantially parallel to the rolling surface (3) of the first sub-element (2) and is arranged to be closer to the central axis (M) of the roller (1) than the rolling surface (3) along the radial axis (R) of the roller (1), wherein the outer sub-portion (8) is substantially hollow cylindrical, wherein the height of the outer sub-portion (8) along the height axis (H) of the roller is smaller than the height of the roller (1), and wherein the first sub-element (2) at least partially surrounds the outer sub-portion (8).

6. The roller (1) according to claim 5, It is characterized in that The outer sub-portion (8) is connected to the second portion (7) via a connecting sub-portion (10) of the first portion (6), wherein the connecting sub-portion (10) extends along the radial axis (R) of the roller (1).

7. The roller (1) according to claim 5, It is characterized in that At least one intermediate sub-section (11) is arranged between the outer sub-section (8) and the second section (7) along the radial axis (R) of the roller (1), wherein the structure of the at least one intermediate sub-section (11) is substantially the same as that of the outer sub-section (8), wherein the outer sub-section (8) is connected to the at least one intermediate sub-section (11) via a connecting sub-section, and wherein the at least one intermediate sub-section (11) is connected to the second section (7) via a connecting sub-section (10).

8. The roller (1) according to claim 6 or 7, It is characterized in that The first sub-element (2) comprises a rolling sub-portion (12) extending along the circumferential direction (U) of the roller (1) and having the rolling surface (3), wherein the rolling sub-portion (12) is at least partially arranged on the upper surface (9) of the outer sub-portion (8), wherein the first sub-element (2) has at least one pair of engaging portions (13), the pair of engaging portions (13) being opposite to each other along the height axis (H) and separated from each other by the connecting sub-portion (10).

9. The roller (1) according to claim 8, It is characterized in that At least the rolling sub-portion (12), the joining portion (13) and the outer sub-portion (8) have substantially the same wall thickness, wherein at least the rolling sub-portion (12), the joining portion (13), the outer sub-portion (8) and at least one intermediate sub-portion (11) have substantially the same wall thickness, wherein at least the rolling sub-portion (12), the joining portion (13), the outer sub-portion (8) and at least one connecting sub-portion (10) have substantially the same wall thickness, wherein at least the rolling sub-portion (12), the joining portion (13), the outer sub-portion (8), at least one intermediate sub-portion (11) and at least one connecting sub-portion (10) have substantially the same wall thickness.

10. The roller (1) according to one of claims 4 to 9, It is characterized in that The second portion (7) of the second sub-element (4) has two opposite end regions (14) along the height axis (H), wherein each end region (14) is formed in a stepped form, wherein the first sub-element (2) abuts against the stepped end region (14).

11. Vehicle seat base provided with a roller guide comprising at least one roller according to at least one of the preceding claims.

12. A vehicle seat provided with a vehicle seat base as claimed in claim 11.

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