Technical field

The present invention relates to the design of the spring of the movable element for the sun visor position arrestment with sliding bolt in motor vehicles.

State of the art

For existing sun visors with sliding bolt in motor vehicles there are known many solutions securing the locking torque during sun visor tilting or rotation around the longitudinal axis of the hinge towards working position. Many solutions do allow sun visor sliding bolt, which is placed inside sun visor body, displacement in the axial direction and rotation of the sun visor combined with arrestment of its position along the longitudinal axis of the sliding bolt simultaneously, using various sliding elements.

Particularly, various spring setups or springs themselves are used for locking the position of the sun visor during its rotation around the longitudinal axis of the bolt, whereas at higher levels a displacement of sun visor body in the axial direction is also possible.

One of the above-mentioned known solutions of set of sun visor with sliding bolt and arrestment device spring is the solution according to the patent EP 1698500, where the sliding element is placed in a cover component attachable to the main body of the sun visor, enabling sliding motion of main sun visor body alongside the revolving bolt. To ensure a sun visor position arrestment, the sliding element is provided with a shaped spring placed outside of the sliding element.

Another known solution is the utility model CN2749715, disclosing a capsule sliding in the axial direction alongside the rotating shaft where the sun visor is rotationally attached. Sun visor position arrestment is secured by a shaped spring, too.

Another known solution allowing rotary motion of the sun visor body around the longitudinal axis of the bold is the solution according to EP0499020, where the sliding element placed in the sun visor body is provided with contact element acting against the orientation of the bold axis, wherein the contact element is provided with a spring tool enabling the arrestment. Also, the patent US5871252 describes a telescopic sun visor in the set with staple-shaped arrestment device spring encircling the sun visor bold. Ideally, this arrestment device spring is made of two opposing U-shaped staples. The sun visor further includes a support arm and the panel, which is telescopically mounted on the plate. The panel has a core, a holder or a channel supporting the core and a set of arrestment device spring or a staple fitting closely on the supporting arm. The arrestment of the staple spring at the same time allows a sliding motion between them in the way that the panel can be moved telescopically in relation to the support arm.

Design of arrestment device springs themselves is a subject of further known solutions, for instance solution according to JP2009248927 describes a spring having a pair of divided spring elements and forming a direct connection with a sun visor bolt via encircling the outer side of the bolt. In essence, the spring follows the shape of the cross-section of the bolt, any of its possible sloping included.

Also, the known solution according to patent US5139303 includes a mechanism for attaching of the sun visor to a rotating shaft using a spring staple enabling rotating shaft displacement thanks to being U-shaped in general, having the first and the second arm staples inside the cover staple which is formed integrally in the back panel of the sun visor cover. A staple cover is designed in the way that the rotating shaft cooperates with one of springy clamp components on initial tension, thus eliminating excess clearance between the spring staple and the sun visor in the case of rotated sun visor.

Simple U-shaped springs in various modifications are used in many other known solutions, for example in patent JP2010143337 or patent JP2009248931.

Unnecessary going up in price of the final product due to complicated construction of sliding element with arrestment device spring seems to be the major disadvantage in this context.

Object of the invention

Majority of deficiencies in the above-mentioned solutions is eliminated to a considerable degree by the spring on the sun visor sliding bolt for the sun visor position arrestment in motor vehicles consisting of a plastic and / or metallic shaped body which essence rests with plastic and / or metallic shaped body of the spring having shape of the letter "G" in a cross- section taken upright to the longimdinal axis of the sh ^' ding bolt when the plastic and / or metallic shaped body of the spring is having at least one cut-out or projection for placing inside the plastic and / or metallic sliding case movable in the axial direction in the sun visor tube with its shape, location and size corresponding to cut-outs or projections created in the inner or outer surface of plastic and / or metallic sliding case, withal the shaped body of the spring is provided with a facet formed by the horizontal part of the letter "G" with its location corresponding to the arrestment facet of the sun visor sliding bolt to produce sufficient arrestment force to arrest the sun visor in the required position. The pressure applied by the spring facet on the sun visor sliding bolt arrestment facet is capable to produce an arrestment force which is sufficient for the required sun visor position arrestment during rotation of the plastic and / or metallic sliding case around the longitudinal axis of the bold and hence during rotation motion of the entire sun visor with a bolt The used spring design ensures an arrestment force which is sufficient for the sun visor arrestment at each position of shding of bolt of the mentioned sun visor in the horizontal direction, too, as well as during the sun visor axial slide.

In one of the preferred embodiments the metallic spring body is shaped into a cross-section G- shape of one precisely cut out sheet metal semi-finished product and subsequently bent into the required cross-sectional shape of the letter "G". In this prefened embodiment the sliding case is made of plastic and is provided with corresponding projections or cut-outs for placing and fixation of the spring.

In another preferred embociiment, the plastic spring body is shaped into cross-section G-shape by injection or extrusion of a suitable plastics material, wherein the sliding case is made of plastic too and provided with corresponding projections or cut-outs for placing and fixation of the spring.

The advantage of the proposed solution for the metallic spring is mainly the fact that the spring is by comparison with current solutions made from one semi-finished product and neither additional components nor consequent assembly of the spring itself are necessary. The spring shape is designed so that it can be easily settled into a plastic sliding case, where it automatically arrests itself.

In the case of plastic spring, the final shape of the spring is obtained in a single working process, wherein the settling into a plastic sliding case is identical with a metallic spring.

Brief description of the drawings

The invention is explained in the attached drawings, wherein Fig. 1 to Fig. 10 show various variants of the technical implementation of the spring itself, Fig. 11 and Fig. 12 show details of spring placement in the sliding plastic case on the sun visors sliding bolt and Fig. 13 shows the set consisting of sun visor tube, sliding element, spring and sun visor bolt in a cross- section. Examples of invention embodiments

Ex. 1

Spring for the sun visor position arrestment on the sliding bolt 2 in motor vehicles according to Fig. 1, Fig. 2, Fig. 11, Fig. 12j and Fig. 13 consists of the metallic shaped body 1 shaped into the cross-section G-shape of one precisely cut out sheet metal semi- finished product. For the placement in a plastic sliding case 3 movable in the axial direction of the sun visor tube 4 placing the metallic shaped spring body 1 is provided with two frontal projections Π. with its shape, location and size corresponding to the two frontal cut-outs created in the inner surface of the plastic sUding case 3. Sufficient arrestment force for arresting the sun visor in the required position is derived from pressure exerted by the facet 10 of the shaped bodyI of the spring on the arrestment facet 20 of the sun visor sliding bolt 2.

Ex. 2

Spring for the sun visor position arrestment on the sliding bolt 2 in motor vehicles according to Fig. 9, Fig. 10, Fig. 11, Fig. 12 and Fig. 13 consists of a plastic shaped body shaped into the cross-section G-shape during the manufacturing process on an extruder. For the placement in the plastic sliding case 3 movable in the axial direction of the sun visor tube 4 placing the plastic shaped spring body 1 is adapted to the inner surface of plastic sliding case 3. Sufficient arrestment force for arresting the sun visor in the required position is derived from pressure exerted by the facet 10 of the shaped body 1 of the spring on the arrestment facet 20 of the sun visor sliding bolt 2.

Ex. 3

Spring for the sun visor position arrestment on the sliding bolt 2 in motor vehicles according to Fig. 3, Fig. 4, Fig. 11, Fig. 12 and Fig. 13 consists of the metallic shaped body 1 shaped into the cross-section G-shape of one precisely cut out sheet metal semi-finished product. For the placement in the plastic sliding case 3 movable in the axial direction of the sun visor tube 4 placing the metallic shaped spring body I is provided with two lateral cut-outs 14 with its shape, location and size corresponding to the two lateral projections created in the inner surface of the plastic sliding case 3. Sufficient arrestment force for arresting the sun visor in the required position is derived from pressure exerted by the facet 10 of the shaped bodyI of the spring on the arrestment facet 20 of the sun visor sliding bolt 2. Ex. 4

Spring for the sun visor position arrestment on the sliding bolt 2 in motor vehicles according to Fig. 5, Fig. 6, Fig. 11, Fig. 12 and Fig. 13 consist of the metallic shaped body I shaped into the cross-section G-shape of one precisely cut out sheet metal semi-finished product. For the placemen? in the plastic sliding case 3 movable in the axial direction of the sun visor tube 4 placing tie metal shaped spring body I is provided with two frontal projections Π. with its shape, lication and size corresponding to two frontal cut-outs created in the inner surface of the pla/tic sliding case 3 and with two frontal cut-outs 14 with its shape, location and size corresponding to the two frontal projections created in the inner surface of the plastic sliding case i _n Sufficient arrestment force for arresting the sun visor in the required position is denied from pressure exerted by the facet 10 of the shaped body 1 of the spring on the arreftment facet 20 of the sun visor sliding bolt 2,

Ex 5

Sping for the sun visor position arrestment on the sliding bolt 2 in motor vehicles according to Fig. 7, Fig. 8, Fig. 11, Fig. 12 and Fig. 13 consists of the metallic shaped body shaped into the cross-section G-shape of one precisely cut out sheet metallic semi-finished product. For the placement in the plastic sliding case 3 movable in the axial direction of the sun visor tube 4 placing the metallic shaped spring body 1 is provided with two lateral cut-outs 14 at each lateral side of the shaped body with its shape, location and size corresponding to two lateral projections created in the inner surface of plastic sliding case 3. Sufficient arrestment force for arresting the sun visor in the required position is derived from pressure exerted by the facet 10 of the shaped body 1 of the spring on the arrestment facet 20 of the sun visor sliding bolt 2.

Besides the above-mentioned examples of embodiment there are also possible other combinations of projections and cut-outs for the placement of the spring of the plastic sliding case of the sun visor bolt.

The sun visor spring according to this invention can be used in all variants of a given type of sun visor in motor vehicles.