Wiper blade and wiper strip unit for a wiper blade
Patent Information
- Application Number
- EP2023789611
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-10-14
- Filing Date
- 2023-10-11
- Publication Date
- 2025-08-20
AI Technical Summary
Conventional wiper blades experience noise and vibration issues during deflection points due to the relative movement between the spring rail and wiper strip unit, leading to inefficient cleaning and increased noise generation.
Incorporating an elastic spacer element that provides guide support between the wiper base body and spring rail, allowing for reduced deflection noise and enhanced damping in the direction of the axis of symmetry, ensuring stable pressing of the spring rail against the cover element.
The elastic spacer element reduces noise and vibration, enabling low-noise wiping movements and improved cleaning efficiency by minimizing vortex formation and providing sufficient damping during regular wiping operations.
Smart Images
Figure 1.1
Abstract
Description
[0001] Description
[0002] Wiper blade and wiper strip unit for one wiper blade
[0003] State of the art
[0004] A wiper blade with at least one spring rail and at least one wiper strip unit with at least one wiper lip and with at least one wiper base body which has at least one spring rail receptacle for receiving the spring rail has already been proposed.
[0005] Disclosure of the invention
[0006] The invention is based on a wiper blade comprising at least one spring rail and at least one wiper strip unit with at least one wiper lip and at least one wiper base body. The wiper blade comprises at least one spring rail arranged at a distance from the wiper base body, in particular arranged at a distance along an axis of symmetry of the wiper blade. It is proposed that the wiper strip unit comprise an elastic spacer element for supporting the spring rail on the wiper base body, wherein the spacer element preferably bears against the spring rail in a contacting manner.
[0007] Preferably, a "wiper strip unit" is understood to mean at least one part, in particular a subassembly, of a wiper blade. The wiper strip unit is preferably designed to wipe a surface, in particular a vehicle windscreen, in particular R. 399011
[0008] - 2 - particularly for cleaning the surface and / or for removing a fluid from the surface. In particular, the wiper strip unit is intended for direct contact with the surface, in particular a vehicle window. The wiper strip unit is preferably intended for use on a vehicle. The wiper strip unit is preferably intended for use on a vehicle window, in particular a windshield and / or a rear window, and / or on a headlight lens. The wiper strip unit preferably comprises at least one wiper base body and a wiper lip.
[0009] The wiper lip is preferably designed to be in direct contact with the surface, in particular the vehicle window, when the wiper strip unit is in operation. In particular, the wiper lip is designed to adapt to the shape of the surface, at least under the action of force, for example through a spring rail of the wiper blade. The wiper lip is preferably made of a natural or synthetic elastomer, in particular of a plastic and / or rubber. The wiper lip is preferably arranged on the wiper base body, in particular formed integrally with the wiper base body. The wiper lip preferably extends at least substantially parallel to a main direction of extension of the wiper strip unit.
[0010] A "main direction of extension" of an object should preferably be understood as a direction that runs parallel to a direction of a longest side of a smallest cuboid that completely encloses the object. "Substantially parallel" should be understood in particular as an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation from the reference direction of, in particular, less than 8°, advantageously less than 5°, and particularly advantageously less than 2°.
[0011] Preferably, the wiper base body of the wiper strip unit is provided for coupling the wiper strip unit to other components of the wiper blade. Other components of the wiper blade include, for example, at least one spring rail, end caps, a spoiler, a fixing element, a wiper arm adapter, a retaining spring, or the like.
[0012] In particular, the wiper base body is designed to at least partially accommodate the spring rail. The wiper base body preferably has a substantially rectangular shape. The wiper base body is preferably designed essentially as a hollow body having a first longitudinal cavity. Preferably, a wall of the wiper base body essentially completely encloses a first longitudinal cavity.
[0013] Preferably, an outer wall surface of the wiper base body and a cover element jointly define a second longitudinal cavity. The spring rail is preferably arranged within this second longitudinal cavity. The spring rail is preferably smaller than the longitudinal cavity. Preferably, after the spring rail is arranged in the longitudinal cavity, a compensating clearance remains between the wiper base body and the spring rail. Preferably, a main extension direction of the first and second longitudinal cavities runs at least substantially parallel to a main extension direction of the wiper base body and / or the wiper strip unit.
[0014] A "main extension direction of a receptacle and / or recess" is understood to mean, in particular, a main extension direction of a wall delimiting the receptacle and / or recess, in particular with an imaginary infinitely thin wall thickness. Preferably, the wiper base body is arranged contact-free with the surface, in particular the vehicle windshield, at least in one operating state of the wiper strip unit. The wiper base body is preferably made of a natural or synthetic elastomer, in particular of a plastic and / or rubber.
[0015] The wiper lip and the wiper base body are preferably made of the same material. The wiper lip is preferably connected to the wiper base body. The wiper lip is preferably formed as one piece with the wiper base body. The wiper lip is preferably formed as one piece, in particular as one piece connected to the wiper base body. “One piece” should be understood to mean in particular as being connected in one piece or by a material fit, for example by a welding process and / or gluing process, etc., and particularly advantageously as being integrally formed, such as by being produced from a single casting and / or by being produced using a single-component or multi-component injection molding process. “One piece” should be understood to mean in particular as being formed in one piece.Preferably, this one piece is produced from a single blank, a mass and / or a casting, particularly preferably in an injection molding process, in particular a single- and / or multi-component injection molding process.
[0016] According to an advantageous development of the invention, a main extension direction of the wiper base body runs at least substantially parallel to the main extension direction of the wiper lip and / or the wiper strip unit.
[0017] According to the invention, the wiper strip unit comprises an elastic spacer element. The elastic spacer element exhibits elasticity, in particular, in the direction of the symmetry axis. The elastic spacer element is designed to position the spring rail at a distance from the wiper base body and to press it against the stop surface of the cover element.
[0018] The inventive design of the wiper blade with such a spacer element advantageously reduces the deflection noise at the respective deflection point of the wiping movement. The elastic spacer element is preferably designed to provide a guide support structure between the wiper base body and that of the spring rail or the cover element. Due to the advantageously reduced relative movement between the spring rail and the wiper strip unit due to the contact pressure, vortex formation can be minimized. At the same time, the elasticity of the spacer element in the direction of the axis of symmetry particularly advantageously enables the provision of damping, so that noise generation can be advantageously reduced even during the regular wiping movement outside the deflection points.
[0019] Preferably, the elastic spacer element of the wiper strip unit is designed such that a sufficient damping effect can be provided in the direction of the symmetry axis, while simultaneously ensuring the restoring force provided by the elastic spacer element for stable pressing of the spring rail against the cover element under the forces acting at the deflection points. The spacer element is designed differently from the spring rail.
[0020] Due to the inventive design of the wiper blade, it is advantageously elastic. In particular, the wiper strip unit with the integrated spring rail can be elastically deformed with advantageously low force. In particular, the wiper strip unit with the integrated spring rail can be advantageously easily deformed during a wiping movement. In particular, a wiper strip unit with an integrated spring rail can be provided, with which advantageously quiet wiping movements can be performed.
[0021] The measures listed in the subclaims also result in advantageous developments and improvements of the features specified in the main claim.
[0022] According to an advantageous development of the invention, the spacer element and the wiper base body are formed as a single piece. The wiper strip unit comprising the wiper lip, the wiper base body, and the spacer element is preferably formed as a single piece, preferably extruded from EPDM. Such a spacer element can be manufactured particularly cost-effectively and easily.
[0023] According to a particularly preferred embodiment of the invention, the spacer element extends substantially in the direction of the axis of symmetry. Preferably, the spacer element extends substantially completely through the compensation space and thus forms a guide support structure between the mop base body and the spring rail arranged at a distance from the mop base body.
[0024] According to a particularly preferred embodiment of the invention, the wiper blade has a cover element opposite the wiper lip. The cover element is preferably designed as a spoiler. The cover element preferably encompasses the wiper body essentially completely in a vertical direction. The cover element preferably encloses the second longitudinal cavity.
[0025] According to an advantageous development of the invention, the wiper blade has at least a first longitudinal cavity and at least a second longitudinal cavity, wherein the first longitudinal cavity is formed in the wiper base body and wherein the second longitudinal cavity is formed between the cover element and an outer wall of the wiper base body. Preferably, the first longitudinal cavity is arranged in the second longitudinal cavity, wherein the spring rail is arranged so as to bear against a contact surface of the cover element, and wherein a compensation space is arranged between the spring rail and the wiper base body in the second longitudinal cavity. Preferably, the compensation space is substantially gap-shaped.
[0026] The spacer element is preferably arranged in a radial outer region of the wiper base body relative to the axis of symmetry, wherein the spacer element preferably bears, preferably in contact, against a radial outer region of the spring rail. The spring rail preferably has a horizontal extension, wherein the spring rail bears against the spacer element in a contact section, wherein the contact section is designed to be many times smaller than the horizontal extension of the spring rail. The contact section preferably covers 10%, preferably 7%, preferably 4% of the horizontal extension of the spring rail. A particularly simple, dimensionally stable connection of the spring rail can be provided in that the spacer element extends as a contact rail, in particular a contact wall, extending in the longitudinal direction over the contour of the wiper base body.Preferably, the wiper base body has a first outer wall facing the spring rail and extending substantially in the horizontal direction, wherein the spacer element is arranged on the first outer wall.
[0027] A particularly preferred embodiment of the invention can be provided in particular in that the spacer element and the first outer wall of the wiping base body are designed with a concave contour.
[0028] Preferably, the spring rail is formed in two parts comprising a first spring rail part and a second spring rail part, wherein the spacer element has at least a first spacer part and a second spacer part, wherein in each case a spacer part is formed to support at least one spring rail part.
[0029] Drawings
[0030] Further advantages will become apparent from the following description of the drawings. The drawings illustrate two exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.
[0031] They show:
[0032] Figure 1 is a schematic representation of a wiper blade according to the invention with a wiper strip unit,
[0033] Figure 2a shows a first embodiment of a wiper blade in a schematic sectional view comprising a first embodiment of a spacer element
[0034] Figure 2b shows a further embodiment of a wiper blade in a schematic sectional view comprising a first embodiment of the spacer element according to Figure 2a
[0035] Figure 3a shows a further embodiment of a wiper blade in a schematic sectional view comprising a second embodiment of a spacer element,
[0036] Figure 3b shows a further embodiment of a wiper blade in a schematic sectional view comprising a second embodiment of a spacer element according to Figure 3a.
[0037] Description of the embodiments
[0038] Figure 1 shows a wiper blade 10. The wiper blade 10 comprises at least one spring rail 17 (see Figure 2). The wiper blade 10 comprises at least one wiper strip unit 11. The wiper strip unit 11 preferably has a longitudinal direction 50a as the main direction of extension. In particular, the longitudinal direction 50a is substantially parallel to a main direction of extension of the wiper blade 10. Preferably, the longitudinal direction 50a is at least substantially perpendicular to an intended wiping direction 30a, 30b of the wiper blade 10, in particular of the wiper strip unit 11. The wiper blade 10 preferably comprises end caps 42a, 44a (not shown in detail). The wiper blade 10 preferably comprises a wiper arm adapter 46a.
[0039] Figure 2 shows a cross-section of the wiper blade 10, in particular in the sectional plane 52a (see Figure 1), which is in particular at least substantially perpendicular to the longitudinal direction 50a. The cross-section of the wiper blade 10 preferably has an axis of symmetry 102, which is in particular at least substantially perpendicular to the wiping direction 30a, 30b and in particular runs at least substantially parallel to the longitudinal direction 50a. In particular, the cross-section of the wiper strip unit 11 is mirror-symmetrical with respect to the axis of symmetry 102. A horizontal direction H of the wiper blade preferably extends orthogonally to the axis of symmetry.
[0040] The wiper strip unit 11 comprises at least one wiper lip 12. The wiper lip 12 is preferably arranged along the axis of symmetry 102. In particular, a main extension direction of the wiper lip 12 runs at least substantially parallel to, and particularly preferably along, the axis of symmetry 102.
[0041] The wiper lip 12 is preferably designed to be mirror-symmetrical, in particular with respect to the axis of symmetry 102. The wiper strip unit 11 comprises at least one wiper base body 14. The wiper lip 12 is preferably arranged on the wiper base body 14. The wiper base body 14 is preferably designed to be mirror-symmetrical, in particular with respect to the axis of symmetry 102. In particular, a main direction of extension of the wiper base body 14 runs at least substantially parallel to, particularly preferably in, the axis of symmetry 102. The wiper base body is preferably designed to be substantially rectangular. The wiper base body is preferably designed as a hollow body and has a first longitudinal cavity 18.
[0042] The wiper base body 14 preferably has a first outer wall 180. The first outer wall preferably extends substantially in the horizontal direction H. The first outer wall is preferably formed orthogonally to the adjoining side walls of the wiper base body. The first outer wall 180 is preferably a wall of the wiper base body 1 facing away from the wiper blade 12.
[0043] The first outer wall 180 is preferably substantially flat. The outer wall 180 preferably has at least a first outer wall section 180a and a second outer wall section 180b. The outer wall sections 180a, 180b are separated from one another by a preferably substantially T-shaped element of the wiper strip unit.
[0044] The outer wall sections 180a, 180b are preferably formed substantially mirror-symmetrically identical to the axis of symmetry 102. The spring rail contact surfaces 16a, 16b preferably each extend in a common horizontal plane. The outer wall sections 180a, 180b preferably each extend over the longitudinal extent 50a of the wiper blade 10.
[0045] The wiper base body 14 comprises at least a first longitudinal cavity 18. The first longitudinal cavity 18 is formed differently from a second longitudinal cavity 130. The first longitudinal cavity 18 is preferably closed in the circumferential direction. The first longitudinal cavity is preferably formed by walls of the wiper base body 14. The wiper lip 12 is preferably arranged below the longitudinal cavity 18 with respect to the axis of symmetry. The wiper lip 12 is preferably arranged substantially outside the longitudinal cavity 18. According to the embodiment of the invention illustrated in Figure 2, the wiper lip 12 is substantially triangular. It is conceivable for the wiper lip 12 to be formed from a solid material. It is also conceivable for the wiper lip 12 to have additional recesses in a direction transverse to the axis of symmetry 102.Preferably, the longitudinal cavity 18 and the wiper lip 12 are connected to each other via a comparatively narrow connecting web 34. Preferably, both the first longitudinal cavity 18 and the wiper lip 12 are symmetrical to the axis of symmetry 102.
[0046] According to the embodiment of the invention illustrated in Figure 2, the first longitudinal cavity 18 has a substantially rectangular shape. However, other cavity shapes are also conceivable, provided they are suitable for providing appropriate compensation in the longitudinal direction. During operation, the wiper lip 12, with its end facing away from the wiper base body 14, is preferably in contact with a surface to be cleaned. Preferably, the wiper lip 12 is substantially perpendicular to the wiping direction 30a, 30b.
[0047] According to the embodiment shown in Figure 2, the wiper strip unit 11 has a T-shaped section 13 adjoining the wiper base body 14. The T-shaped section comprises an upper bar 126 and a web 128. The cavity of the first longitudinal cavity 18 can be filled with air at atmospheric pressure, with a special gas, or alternatively with compressed air.
[0048] A cover element 100 is arranged on the side of the wiper strip unit 11 facing away from the wiper lip 12. The cover element 100 is preferably designed as a spoiler. The cover element 100 has two side walls 104a, 104b. The side walls 104a, 104b extend essentially in the direction of the axis of symmetry 102. The side walls 104a, 104b preferably cover the entire height of the first longitudinal cavity 18. A second longitudinal cavity 130 is preferably formed between the cover element 100 and the wiper base body 14. The second longitudinal cavity is bounded at the top and sides by the cover element 100 and at the bottom by the first outer wall of the wiper base body 14.
[0049] A spring rail 17 is arranged within the second longitudinal cavity 130. The spring rail 17 is preferably made of a metal. The spring rail is preferably formed essentially as a thin bar. The spring rail preferably extends essentially in the horizontal direction H. The spring rail 17 preferably has a thickness that is less than the height of the second longitudinal cavity 130.
[0050] The cover element 100 preferably has a spring rail contact surface 101 extending essentially horizontally, against which the spring rail 17 rests flatly. The spring rail contact surface defines the upper limit of the second longitudinal cavity. According to the embodiment of the invention illustrated in Figure 2, the spring rail 17 is formed in two parts and has a first spring rail section 17a and a second spring rail section 17b.
[0051] The spring rail sections 17a and 17b are preferably separated from one another by the separating element 13. The two spring rail sections 17a, 17b are preferably designed identically. The spring rail sections preferably rest against the beam 128 of the T-shaped element 130 in a radial inner region. The spring rail 17 is arranged at a distance from the wiper base body 14 within the second longitudinal cavity. The second longitudinal cavity is preferably separated by the separating element 13 into two longitudinal cavity sections 130a, 130b. Both longitudinal cavity sections 130a, 130b of the second longitudinal cavity are preferably designed as substantially rectangular, preferably identical, in particular mirror-symmetrically identical longitudinal cavities. Preferably, a compensation clearance is provided between the spring rail 17 and the outer wall 180 of the wiper body in the case of a spring rail 17 arranged within the second longitudinal cavity 130.
[0052] The wiper strip unit 11 has an elastic spacer element 110. The spacer element 110 preferably has at least a first spacer section 110a and a second spacer section 110b.
[0053] According to the embodiment of the invention illustrated in Figure 2, the spacer element 110 is made of the same material as the wiper base body 14 and the wiper lip 12. Preferably, the spacer element is integrally formed on the wiper base body 1. Preferably, the spacer element 110 is formed integrally with the wiper base body.
[0054] According to the embodiment of the invention illustrated in Figure 2a, the spacer element 110 is substantially rectangular. The spacer element 110 preferably extends along the entire longitudinal direction 50a. The spacer element 110 is preferably designed as a narrow, bar-shaped support element for the spring rail 17. The spacer element 110 preferably extends substantially in the direction of the axis of symmetry 120. The spacer element 110 is designed to form a vertical support for the spring rail 17. The spacer element 110 advantageously braces the spring rail 17 against the cover element. At the same time, the spacer element 110 allows for compensation in the vertical direction.The elastic spacer element 110 is capable of substantially preventing, at least partially, the spring rail from detaching from the cover element 100 during the folding movement of the wiper at the folding points, thus preventing unwanted folding noises. At the same time, due to its elasticity and the associated damping effect, the elastic spacer element 110 is capable of providing a sufficient vertical damping effect during the wiping movement outside the folding points.
[0055] According to the embodiment of the invention illustrated in Figure 2a, the spacer element 110 has a first spacer section 110a and a second spacer section 110b. The spacer sections 110a and 110b are preferably substantially identical.
[0056] According to a particularly preferred embodiment of the invention, the spacer sections 110a, 110b of the spacer 110 are each arranged in a radial outer region of the wiper base body 1 relative to the axis of symmetry. The spacer sections can be designed as an extension of a respective side wall of the wiper base body 1 that extends beyond the contour of the wiper base body. Preferably, the spacer sections 100a, 100b each bear in contact with a contact surface of the corresponding spring rail sections 17a, 17b.
[0057] The spring rail sections 17a, 17b each have a width of 1 1 in the horizontal direction. The spring rail sections 17a, 17b each rest in a contact section 1 2a, 1 2b on the respective contact section 110a, 100b of the contact element 100. This contact section 1 2a, 1 2b is designed to be many times smaller with respect to the width 1 1 a, 1 1 b, or the horizontal extent of the spring rail sections 17a, 17b. The contact thus only occurs at a small contact point. The contact section preferably covers only 10%, preferably 7%, particularly preferably 4% of the horizontal extent 41 a, 41 b of the spring rail 17.
[0058] According to the embodiment of the invention illustrated in Figure 2, the wiper strip unit, comprising the wiper lip 12, the connecting web 34, the wiper base body 1, the separating element 13, and the spacer element 110, is formed in one piece from a wiper rubber. The wiper strip unit 11 is preferably extruded from EPDM. A co-extrusion process is used here, but alternatively, only a single plastic can be used. A preferred embodiment of the invention can provide for the wiper lip 12 to be formed from slightly softer EPDM than the remaining area of the wiper strip unit 11. It is also conceivable for the longitudinal cavity 18 to have greater rigidity than the wiper lip 12. The longitudinal cavity 18 is preferably designed such that it has a higher damping factor than the wiper lip 12.Preferably, the spacer element 110 is designed to be particularly dimensionally stable, so that a dimensionally stable contact surface for the spring rail 17 can be provided.
[0059] Figures 2a, 3a, and 3b each show further exemplary embodiments of the invention. The following description and the drawings are essentially limited to the differences between the exemplary embodiments. Regarding components with the same designation, particularly with regard to components with the same reference numerals, reference can also be made to the drawings and / or the description of the other exemplary embodiments, particularly Figures 1 and 2a.
[0060] Figure 2b corresponds to the embodiment of the invention according to Figure 2a, wherein a wraparound portion 105a, 105b adjoins the side walls 104a, 104b of the cover element 100j. The wraparound portion 105a, 105b is preferably arranged as a projection on the corresponding side wall 104a, 104b extending substantially in the wiping direction 30a, 30b. The wraparound portion 105a, 105b is preferably an integral part of the cover element 100.
[0061] Figure 3a corresponds to the embodiment of the invention according to Figure 2, with the difference that the spacer element 110 and the first outer wall 180 of the wiper base body 14 are designed with a concave contour. According to a particularly preferred embodiment of the invention, the spacer element 100 and the first outer wall 180 of the wiper base body follow a common, preferably essentially crack-free, concave contour.
[0062] Figure 3b corresponds to the embodiment of the invention according to Figure 3a, wherein a wraparound portion 105a, 105b adjoins the side walls 104a, 104b of the cover element 100j. The wraparound portion 105a, 105b is preferably arranged as a projection on the corresponding side wall 104a, 104b, extending substantially in the wiping direction 30a, 30b. The wraparound portion 105a, 105b is preferably an integral part of the cover element 100.
Claims
Claims 1 . Wiper blade (10) comprising at least one spring rail (17, 17a, 17b) and at least one wiper strip unit (11) with at least one wiper lip (12) and with at least one wiper base body (14), wherein the wiper blade (10) has at least one spring rail (17, 17a, 17b) arranged at a distance from the wiper base body (1), in particular arranged at a distance along an axis of symmetry (102) of the wiper blade (10), characterized in that the wiper strip unit (11) has an elastic spacer element (110, 110a, 110b) for supporting the spring rail (17, 17a, 17b) on the wiper base body (14), wherein the spacer element (110, 110a, 110b) is preferably arranged in contact with the spring rail (17, 17a, 17b).
2. Wiper blade (10) according to claim 1, characterized in that the spacer element (110, 110a, 100b) and the wiper base body (14) are formed in one piece.
3. Wiper blade (10) according to one of the preceding claims, characterized in that the spacer element (110, 120a, 110b) extends substantially in the direction of the axis of symmetry (102).
4. Wiper blade (10) according to one of the preceding claims, characterized in that the spacer element (110, 110a, 110b) is formed from a wiper rubber, in particular from an extruded EPDM wiper rubber.
5. Wiper blade (10) according to one of the preceding claims, characterized in that the wiper blade (10) has a cover element (100), in particular a spoiler, opposite the wiper lip (12), wherein the cover element (100) encompasses the wiper base body (14) and the spring rail (17, 17a, 17b). Wiper blade (10) according to one of the preceding claims, characterized in that the wiper blade (10) has at least one first longitudinal cavity (18) and at least one second longitudinal cavity (130), wherein the first longitudinal cavity (18) is formed in the wiper base body (14) and wherein the second longitudinal cavity (130) is formed between the cover element (100) and an outer wall (180, 180a, 180b) of the wiper base body (1). Wiper blade (10) according to one of the preceding claims, characterized in that the spring rail (17, 17a, 17b) is arranged in the second longitudinal cavity (130), wherein the spring rail (17, 17a, 17b) is arranged so as to bear against a contact surface (190) of the cover element (100) and wherein a compensation space is arranged between the spring rail (17, 17a, 17b) and the wiper base body (14) in the second longitudinal cavity (130).Wiper blade (10) according to one of the preceding claims, characterized in that the spacer element (110, 110a, 110b) is arranged in a radial outer region of the wiper base body (14) with respect to the axis of symmetry (102), wherein the spacer element (110, 110a, 110b) preferably bears against a radial outer region of the spring rail (17, 17a, 17b), preferably in contact. Wiper blade (10) according to one of the preceding claims, characterized in that the spring rail (17, 17a, 17b) has a horizontal extension (141a, 141b), wherein the spring rail (17, 17a, 17b) bears against the spacer element (110, 110a, 110b) in a contact section (142a, 142b), wherein the contact section (142a, 142b) is designed to be many times smaller than the horizontal extension (141a, 141b) of the spring rail (17, 17a, 17b).
10. Wiper blade (10) according to one of the preceding claims, characterized in that the contact section (142a, 12b) covers 10%, preferably 7%, preferably 4% of the horizontal extension (141a, 141b) of the spring rail (17, 17a, 17b).
11. Wiper blade (10) according to one of the preceding claims, characterized in that the spacer element (110, 110a, 110b) extends as a contact rail, in particular a contact wall, extending in the longitudinal direction (50a) over the contour of the wiper base body (14).
12. Wiper blade (10) according to one of the preceding claims, characterized in that the wiping base body (14) has a first outer wall (180, 180a, 180b) facing the spring rail (17, 17a, 17b) and extending substantially in the horizontal direction (H), wherein the spacer element (110, 110a, 110b) is arranged on the first outer wall (180, 180a, 180b).
13. Wiper blade (10) according to one of the preceding claims, characterized in that the spacer element (110, 110a, 110b) and the first outer wall (180, 180a, 180b) of the wiper base body (14) are designed with a concave contour.
14. Wiper blade (10) according to one of the preceding claims, characterized in that the spring rail (17, 17a, 17b) is designed in two parts comprising a first spring rail part (17a) and a second spring rail part (17b), wherein the spacer element (110, 110a, 110b) has at least a first spacer part (110a) and a second spacer part (110b), wherein in each case a spacer part (110a, 110b) is designed to support at least one spring rail part (17a, 17b). Wiper strip unit (11) according to one of the preceding claims, characterized in that the wiper strip unit (11) has at least one wiper lip (12), at least one wiper base body (14) and at least one spacer element (110, 110a, 110b).