CN212313666U - Heating pad and steering wheel - Google Patents

Abstract

The application discloses a heating pad and a steering wheel, wherein the heating pad comprises a net-shaped substrate and a bent metal wire fixed on the net-shaped substrate; the length direction of the heating pad is a first direction, and the width direction of the heating pad is a second direction; the mesh substrate includes a first structure extending in a first direction and a second structure extending in a second direction; the first structure and the second structure are woven to form a mesh substrate; the first direction is substantially perpendicular to the second direction; the heating pad has a greater extensibility in a first direction than in a second direction; the heating pad has the advantages that due to the fact that the heating pad can be extensible in the length extending direction of the rim of the steering wheel, wrinkles generated when the heating pad covers the steering wheel are avoided; meanwhile, when the reticular base material is woven by yarns, the thickness of the reticular base material can be below 1mm, the reticular base material is particularly suitable for a steering wheel which is thin and hard and is foamed for the second time, and the reticular base material has good permeability, so that the primary foaming layer and the secondary foaming layer can be better connected, and the structural integrity of the steering wheel is improved.

Description

Heating pad and steering wheel

Technical Field

The present disclosure relates generally to the field of automotive steering wheel technology, and more particularly to a heating mat and a steering wheel.

Background

Under the condition of relatively low ambient temperature, when the running direction of the control equipment is controlled, the cold steering wheel can cause the hand feeling to be very uncomfortable, and in a serious condition, the reaction is not timely caused by the stiffness of the hand, so that an unnecessary disaster is caused. Therefore, in order to improve the comfort of human body, reduce the occurrence of disasters and meet the current market demands, the heating device assembled on the steering wheel for controlling the running direction of equipment has more and more extensive market demands.

The existing heating structure of the steering wheel is mainly formed by a base material and a heating wire fixed on the base material, and the existing heating pad base material is generally made of thin foaming materials (such as PE) or non-woven fabrics; since the above materials have no ductility, the surface of the steering wheel is likely to be wrinkled during coating due to the non-ductility of the base material, which may cause problems such as uneven heating of the steering wheel and an unattractive surface.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it would be desirable to provide a heating mat and a steering wheel that do not wrinkle when wrapped around the steering wheel.

In a first aspect, the present application provides a heating mat comprising a mesh substrate and a curved metal wire fixed on the mesh substrate; the length direction of the heating pad is a first direction, and the width direction of the heating pad is a second direction; the mesh substrate comprises a first structure extending along a first direction and a second structure extending along a second direction; the first structure and the second structure are woven to form the mesh substrate; the first direction is substantially perpendicular to the second direction; the heating pad has a greater extensibility in a first direction than in a second direction.

According to the technical scheme provided by the embodiment of the application, the first structure is a first weaving structure with the ductility of 5% -30%.

According to the technical scheme provided by the embodiment of the application, the second braided structure is a hollow structure braided by at least 2 strands of silk yarns.

According to the technical scheme provided by the embodiment of the application, the second structure is a single filament or a second woven structure with the ductility of more than or equal to 0% and less than or equal to 5%.

According to the technical scheme provided by the embodiment of the application, the second braided structure is a solid structure braided by at least 2 strands of silk yarns.

According to the technical scheme provided by the embodiment of the application, a flexible layer is adhered to any one side or two sides of the mesh-shaped base material.

According to the technical scheme provided by the embodiment of the application, the metal conducting wires are uniformly adhered or sewn on the reticular base material.

The second convenience is that the application provides a steering wheel, the rim of the steering wheel is wrapped with the heating pad; the first direction is substantially parallel to a circumferential direction of the rim.

According to the technical scheme that this application embodiment provided, the rim is equipped with once foaming layer, first glue film, heating pad, second glue film and secondary foaming layer outward in proper order.

According to the technical scheme that this application embodiment provided, be equipped with on the steering wheel and leave hand detection device, the heating pad is used as the response structure who leaves hand detection device.

In the above technical solution in the present application, by designing the base material of the heating mat as a woven mesh structure, the mesh base material includes a first structure extending along a first direction and a second structure extending along a second direction; the first structure and the second structure are woven to form the mesh base material, and the ductility of the heating mat in the length direction is larger than that in the width direction, so that the heating mat for covering the rim of the steering wheel is in a long strip shape, and the length of the heating mat is slightly shorter than the outer circumference of the rim; the outer side of the rim of the steering wheel is fully covered by the ductility in the first direction, the wrinkles are reduced due to no stress on the inner perimeter, and the attractiveness of the heating pad and the steering wheel is maintained; simultaneously, because netted substrate when being woven by the yarn, its thickness can accomplish below 1mm, because the design of secondary foaming steering wheel has thin and hard demand, the heating pad of this application is particularly useful for the steering wheel of secondary foaming, and because the permeability of netted substrate is good, can connect primary foaming layer and secondary foaming layer better, has improved the wholeness of the structure of steering wheel.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural diagram of example 1 of the present application;

FIG. 2 is a schematic structural diagram of an embodiment of a first structure in example 1 of the present application;

FIG. 3 is a schematic structural diagram of another embodiment of a first structure in example 1 of the present application;

FIG. 4 is a schematic structural view of a first knitted structure of example 1 of the present application before being stretched;

FIG. 5 is a schematic drawing of a first knitted structure of the present application after stretching;

FIG. 6 is a schematic view of the structure of FIG. 3 after stretching in a first direction;

FIG. 7 is a schematic sectional view taken along the line A-A in FIG. 3;

FIG. 8 is a schematic cross-sectional view taken along plane B-B of FIG. 6;

FIG. 9 is a schematic structural diagram of embodiment 2 of the present application;

fig. 10 to 12 are schematic structural views of embodiment 3 of the present application.

Reference numbers in the figures:

1. a first structure; 2. a second structure; 2a, a single wire; 2b. a second braided structure; 1b. a first braided structure; 3. a mesh substrate; 4. a flexible layer; 5. a heating pad; 6. a metal wire; 8. a rim; 7. a steering wheel; 10. a primary foaming layer; 11. a first glue layer; 12. a second adhesive layer; 13. a secondary foaming layer; 14. and (4) covering the skin.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

As shown in fig. 1, the heating pad 5 includes a mesh substrate 3 and a curved metal wire 6 fixed on the mesh substrate; the length direction of the heating pad is a first direction, and the width direction of the heating pad is a second direction; the mesh substrate 3 comprises a first structure 1 extending along a first direction and a second structure 2 extending along a second direction; the first structure 1 and the second structure 2 are woven to form the mesh substrate 3; the first direction is substantially perpendicular to the second direction; the heating mat has a extensibility in a first direction of greater than 5%; the heating pad has a greater extensibility in a first direction than in a second direction. As shown in fig. 1, the first direction is a horizontal direction in fig. 1, and the second direction is a vertical direction in fig. 1; by "substantially perpendicular" in this embodiment, it is meant that the angle between the first direction and the second direction is in the range of about 90 degrees, for example between 80 ° and 100 °. The heating pad 5 in this embodiment is used for covering the rim 8 of the steering wheel, so that the steering wheel has a heating function, and when covering, the first direction is a circumferential direction substantially parallel to the rim 8 of the steering wheel 7, that is, a surrounding direction indicated by an arrow a in the drawing; the second direction is thus a circumferential direction substantially parallel to the longitudinal section of the rim of the steering wheel.

When the heating pad is expanded in the first direction, the bent structure of the metal wires 6 is also changed in the first direction, i.e., the metal wires 6 are spread in the first direction, and the distance between both ends thereof becomes large, while at the same time, the distance between the adjacent metal wires 6 is changed little in the second direction.

The heating pad used for coating the rim of the steering wheel is strip-shaped, and the length of the heating pad is slightly shorter than the outer circumference of the rim; the outside of the rim of the steering wheel is completely covered by the ductility in the first direction, and the wrinkles are reduced because the inner perimeter is not stressed. The mesh substrate 3 in this embodiment can therefore conform to the curved surface of the rim 8 of the steering wheel 7, thereby avoiding the formation of wrinkles.

Wherein the second structure 2 optionally adopts the following manner:

1. as shown in fig. 2, the second structure 2 is a single thread 2 a; the filaments may be, for example, white yarns; the single wire allows the second structure 2 to be non-malleable in the second direction, which may be non-malleable or less malleable due to the smaller longitudinal section perimeter of the steering wheel rim; the longitudinal section is the section designated 8 in fig. 10, i.e. the section shown in fig. 11.

2. As shown in fig. 3, the second structure is a second braided structure 2b having a ductility of 5% or less, the second braided structure 2b being, for example, a solid structure braided from 2 strands of wires; the second knitted structure may be, for example, a twisted braid shape formed by knitting 3 white yarns, and the extensibility of the second knitted structure 2b may be controlled by controlling the tightness of the knitting during the knitting process, and in the present embodiment, it is suitable to knit the second knitted structure 2b in a tight manner.

Wherein, the first structure 1 optionally adopts the following manner:

1. the first structure 1 is a solid structure knitted with at least 2 strands, i.e. in correspondence with the formation of the second knitted structure 2b, but the second structure 2 is adapted to be knitted looser with respect to the first knitted structure 2b, so that the ductility of the second structure may be between 5% and 30%, preferably between 10% and 30%.

2. As shown in fig. 4, the first structure 1 adopts a second knitting structure 1b having a ductility of 5% to 30%, and the second knitting structure 1b is a hollow structure knitted by at least 2 strands of yarn, for example, during knitting, to form a cylindrical shape, and the side wall of the cylinder is knitted by yarn, and since the hollow structure has not only the ductility of the side wall but also a hollow design, it is possible to further have the ductility in the overall shape as shown in fig. 5, and thus it is possible to achieve a more excellent ductility.

As shown in fig. 6, which is a schematic view of the structure of the heating mat 5 of fig. 3 after extending in the first direction, the heating mat is elongated by about 20% in the first direction, and the heating mat is not substantially changed in length in the second direction due to poor extensibility.

Fig. 7 is a sectional view taken along the line a-a in fig. 3, and fig. 8 is a sectional view taken along the line B-B in fig. 6; after the heating mat is stretched in the first direction, the hollow cross section of the hollow structure becomes smaller or even smaller, so that the heating mat has excellent ductility in the first direction.

The "hollow structure" and the "solid structure" are opposite concepts, that is, for example, a twist-braid knitting method is a solid structure because a hollow is not formed in comparison with the knitting method of fig. 4.

The fixing manner of the metal wire 6 and the mesh substrate 3 can be selected from the following manners:

1. the net-shaped substrate 3 is fixed by adopting a sticking way;

2. is fixed on the reticular base material 3 by adopting a sewing mode.

Example 2

In addition to example 1, in the heating mat 5 provided in this example, as shown in fig. 9, the flexible layer 4 is provided on either side of the mesh base material 3 of the heating mat 5, and in other embodiments, the flexible layer 4 is bonded to both sides of the mesh base material 3. The arrangement of the flexible layer 4 can flatten the touch feeling of uneven surface caused by the mesh-shaped base material and the metal conducting wire, and the comfort level is improved.

Wherein, the material of the flexible layer 4 can be selected from flexible materials such as foaming material, foam, gauze and the like.

Example 3

As shown in fig. 10, the present embodiment provides a steering wheel, wherein a rim 8 of the steering wheel 7 is coated with the heating mat 5 described in embodiment 1 or embodiment 2; the coating direction is as follows: the first direction is substantially parallel to the circumferential direction of the rim 8.

The cross-sectional structure diagram formed by dissecting the middle cross section of the rim perpendicular to the axial direction of the steering wheel layer by layer in the direction of the cladding layer of the steering wheel is taken as a main visual angle to illustrate different shapes formed by cladding different heating pads on the rim and corresponding use functions of the corresponding shape structures.

Wherein the steering wheel is optionally a one-shot steering wheel or a two-shot steering wheel.

As shown in fig. 11, when the steering wheel is a one-time foaming steering wheel, the rim 8 is foamed with a one-time foaming layer 10, and since the heating pad 5 is wrapped on the outer side of the one-time foaming layer 10 through a first adhesive layer 11, the heating pad 5 is closer to the wrapping skin 14, so the heating pad 5 provided with the flexible layer 4 in embodiment 2 is preferably used to improve the comfort of holding the steering wheel. Or the heating mat 5 in the embodiment 1 is adopted, but a layer of spacing layer is additionally arranged between the heating mat 5 and the skin 14 to improve the comfort.

Preferably, the steering wheel is a secondary foaming steering wheel; the steering wheel adopting the heating pad 5 is suitable for a steering wheel with secondary foaming because the thickness of the steering wheel can be below 1 mm; because the steering wheel of secondary foaming generally has higher hardness and has smaller requirement on the diameter of the longitudinal section of the wheel rim; the thin heating mat is suitable for a secondary foamed steering wheel.

As shown in fig. 12, the rim 8 of the steering wheel which is foamed twice is provided with a primary foamed layer 10, a first adhesive layer 11, a heating pad 5, a second adhesive layer 12, a secondary foamed layer 13 and a skin 14 arranged outside the secondary foamed layer in sequence.

Wherein the first glue layer 11 and the second glue layer 12 each optionally adopt the following embodiments:

1. double-sided adhesive tape without base material;

2. and coating glue to form.

When the metal wire 6 on the heating pad 5 is fixed by gluing, especially when a whole adhesive film is used, the first adhesive layer 11 may be absent, and the heating pad 5 is directly fixed on the primary foaming layer 10 through the adhesive film between the metal wire 6 and the mesh substrate 3.

In this embodiment, since the heating pad 5 has the mesh-shaped base material, when the second foaming is performed, the foaming material of the second foaming layer 13 can contact with the material of the first foaming layer 10 through the mesh-shaped base material to form a whole, so that the steering wheel has integrity and higher strength.

Example 4

On the basis of embodiment 3, the steering wheel 7 is provided with a hands-off detection device, and the heating mat 5 is used as an induction structure of the hands-off detection device, specifically, the metal wire 6 is used as an induction structure of the hands-off detection device. That is, the heating pad 5 does not have a heating function, and the two ends of the metal wire 6 are not connected with the heating circuit of the steering wheel, but connected with the off-hand detection circuit, and used for sensing whether the hand is held on the steering wheel; the off-hand detection function at this time replaces the heating function in embodiment 3; the hands-off detection device also comprises a controller MCU.

The specific circuit structure of the off-hand detection circuit is the one existing in the prior art, and is not described herein, when the MCU judges that the capacitance signal between the metal wire 6 and the ground falls within the set threshold range by receiving the signal of the metal wire 6, it judges that the hand leaves the steering wheel, and at this time, an alarm signal is sent, which may be a pulse signal, a communication packet, a level signal, or the like. Generally, when no one holds the metal wire, the capacitance value of a capacitor formed between the metal wire and the ground (the rim skeleton of the steering wheel is regarded as the ground) is between 800pF and 1000pF, and when two hands contact the steering wheel, the change amount of the capacitance value is between 200pF and 500 pF; therefore, in the present embodiment, the threshold signal is set to 200pF to 500 pF; when the controller detects that the capacitance signal falls within the set threshold signal range of 200pF-500pF, the controller judges that the human hand leaves the steering wheel and sends out an alarm signal.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. A heating mat, characterized by comprising a mesh base material (3) and a bent metal wire (6) fixed to the mesh base material; the length direction of the heating pad is a first direction, and the width direction of the heating pad is a second direction; the mesh substrate (3) comprises a first structure (1) extending along a first direction and a second structure (2) extending along a second direction; the first structure (1) and the second structure (2) are woven to form the mesh substrate (3); the first direction is substantially perpendicular to the second direction; the heating pad has a greater extensibility in a first direction than in a second direction.

2. A heating mat according to claim 1, characterized in that the first structure (1) is a first knitted structure (1b) having a extensibility of more than 0% and less than or equal to 30%.

3. A heating mat according to claim 2, characterized in that the first knitted structure (1b) is a hollow structure knitted from at least 2 strands of wire.

4. A heating mat according to claim 1, characterized in that the second structure (2) is a single thread (2a) or a second braided structure (2b) with a extensibility of 0% or more and 5% or less.

5. A heating mat according to claim 4, characterized in that the second knitted structure (2b) is a solid structure knitted from at least 2 strands of wire.

6. A heating mat according to any of claims 1 to 5, wherein the mesh substrate (3) is affixed with a flexible layer (4) on either or both sides.

7. A heating mat according to any of claims 1 to 5, characterized in that the metal wires (6) are glued or sewn to the mesh substrate (3).

8. A steering wheel, characterized in that the rim (8) of the steering wheel (7) is externally coated with a heating mat (5) according to any one of claims 1 to 7; the first direction is substantially parallel to a circumferential direction of the rim (8).

9. The steering wheel according to claim 8, characterized in that a primary foam layer (10), a first adhesive layer (11), a heating pad (5), a second adhesive layer (12) and a secondary foam layer (13) are arranged outside the rim (8) in sequence.

10. The steering wheel according to claim 8 or 9, characterized in that the steering wheel (7) is provided with a hands-off detection device, the heating mat (5) serving as a sensing structure for the hands-off detection device.

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