Electric heating device for automobile steering wheel cover, steering wheel cover and steering wheel

Abstract

The utility model relates to an electric heating device for an automobile steering wheel cover, the steering wheel cover and a steering wheel. The utility model provides an electric heating device for an automobile steering wheel cover, and the electric heating device comprises conductive leather which comprises a front surface and a back surface used for wrapping the outer surface of a spoke of an automobile steering wheel; the heating electrode comprises a positive annular heating electrode, a positive access end, a negative annular heating electrode and a negative access end; the positive annular heating electrode and the negative annular heating electrode are arranged to be of an annular structure and are pasted on the back surface of the conductive leather at intervals. In addition, the utility model further provides an automobile steering wheel cover and an automobile steering wheel. According to the electric heating device for the automobile steering wheel cover, more uniform heating is achieved on the basis that the heating speed is higher and the heating power is lower, and a user can obtain better heating experience.

Description

Technical Field

[0001] The present application relates to the technical field of automotive accessories, and particularly to an electric heating device for an automotive steering wheel cover, a steering wheel cover, and a steering wheel. Background Art

[0002] A steering wheel, i.e., a round handle, is provided on a vehicle for operating the driving direction. The structure of the steering wheel is usually that an epidermal material made of natural or artificial leather, etc. is wound around a metal core material, or a foaming layer is provided on the metal core material, and the material is usually plastic foaming, and the leather is wrapped on the foaming layer. Since the steering wheel is operated by the driver's hand during vehicle travel, it is used frequently, and there are high requirements for the epidermal material, i.e., the leather, used for the steering wheel in terms of durability such as wear resistance.

[0003] Currently, the electric heating steering wheels on the market generally use a resistance wire heating pad as the heating substrate. The resistance wire heating pad is not suitable for direct contact with the human body and is usually wrapped under the surface material of the steering wheel such as leather. This multi-layer structure has a high complexity and there are many problems: 1. The heating experience is poor. After the resistance wire heating pad generates heat, it still needs to pass through the heat conduction of the outer layer of leather, with a slow heating speed and a high required power; 2. The wrapping process is complex and costly. Compared with the wrapping of a steering wheel without an electric heating function, an additional wrapping process for the heating pad needs to be added, resulting in a lower overall yield and higher cost. In addition, in order to reduce the difficulty of the wrapping process, there is also a solution to place the resistance wire heating pad in the foaming layer through a secondary foaming technology. Although this solution simplifies the wrapping process, it sacrifices a certain heating efficiency and makes the already poor heating experience even worse.

[0004] Therefore, the prior art still needs to be improved and enhanced. Summary of the Utility Model

[0005] In order to solve one or more of the above technical problems, such as poor heating experience, slow heating speed, high required power, lower overall yield, and higher cost, etc., the present disclosure provides an electric heating device for an automotive steering wheel cover, a leather heating pad with both the ability to be electrically heated and surface decoration attributes, such that the leather heating pad can be directly wrapped on the foaming layer of the steering wheel. Compared with the existing solutions, the structure of the existing electric heating steering wheel device is greatly simplified, and it has the characteristics of a better heating experience and a lower system cost.

[0006] In a first aspect of the present disclosure, an electric heating device for an automobile steering wheel cover is proposed. The electric heating device includes: a conductive leather, including a front surface and a back surface for covering the outer surface of the spoke of the above-mentioned automobile steering wheel; a heating electrode, including a positive annular heating electrode, a positive access terminal, a negative annular heating electrode, and a negative access terminal; the above-mentioned positive annular heating electrode and the above-mentioned negative annular heating electrode are arranged in an annular structure and are spaced and pasted on the back surface of the above-mentioned conductive leather.

[0007] Further, in some embodiments, the above-mentioned positive access terminal is arranged on the above-mentioned positive annular heating electrode; the above-mentioned negative access terminal is arranged on the above-mentioned negative annular heating electrode, and the above-mentioned positive access terminal is arranged to be far from the above-mentioned negative access terminal.

[0008] Further, in some embodiments, the above-mentioned positive annular heating electrode and the above-mentioned negative annular heating electrode are arranged as a pair of positive and negative electrodes with the same inner diameter in an annular structure.

[0009] Further, in some embodiments, the above-mentioned heating electrode is connected to an external power supply through the above-mentioned positive access terminal and the above-mentioned negative access terminal.

[0010] Further, in some embodiments, an insulating finish layer is sprayed on the front surface of the above-mentioned conductive leather.

[0011] Further, in some embodiments, the above-mentioned heating electrode is arranged as a printed electrode and is pasted and fixed on the back surface of the above-mentioned conductive leather.

[0012] In a second aspect of the present disclosure, an automobile steering wheel cover is further proposed. The automobile steering wheel cover includes: the electric heating device as described above; and the above-mentioned conductive leather is arranged as an annular hollow sleeve body, and the cross-section of the sleeve body is in a "C" shape.

[0013] Further, in some embodiments, sewing edges for sewing are symmetrically arranged on both sides of the inner circle of the above-mentioned sleeve body, and the above-mentioned positive annular heating electrode and the above-mentioned negative annular heating electrode are respectively arranged close to the above-mentioned sewing edges.

[0014] In a third aspect of the present disclosure, an automobile steering wheel is further proposed. The automobile steering wheel includes: the automobile steering wheel cover as described above; and the above-mentioned positive annular heating electrode and the above-mentioned negative annular heating electrode are arranged to surround the spoke of the above-mentioned automobile steering wheel.

[0015] Further, in some embodiments, the above-mentioned positive annular heating electrode and the above-mentioned negative annular heating electrode are arranged close to the inner circle of the spoke of the above-mentioned automobile steering wheel, and the above-mentioned sleeve body is sewn on the above-mentioned automobile steering wheel, and the cross-section of the sewn sleeve body is in an "O" shape.

[0016] The beneficial effects of the present disclosure are as follows:

[0017] 1) On the basis of the conductive leather material that conducts electricity as a whole using leather, the heating electrodes are arranged on the side of the back surface of the conductive leather close to the vehicle steering wheel, and the heating electrodes are set as a positive annular heating electrode and a negative annular heating electrode in an annular structure; and the positive annular heating electrode and the negative annular heating electrode are adhesively pasted at intervals on the back surface of the conductive leather, so that the positive and negative electrodes and the conductive leather form a resistance heating structure.

[0018] 2) Further, the positive access end of the heating electrode is arranged on the positive annular heating electrode; the negative access end of the heating electrode is arranged on the negative annular heating electrode, and the positive access end and the negative access end are arranged far away from each other; most preferably, the positive access end and the negative access end are arranged at the farthest distance. Since the annular resistor is not an ideal electrode (that is, the resistance is not zero, but there is a certain resistance value), the electric potential at the position farther away from the input end will gradually decrease with the distance, and the electrode potential at the position farthest from the access end should be the lowest electric potential on the annular electrode; then arranging the positive access end and the negative access end far away from each other makes the potential difference between the two annular structures (in the case of equidistant interval arrangement) approximately the same, which is beneficial to forming a resistance heating structure with the same potential difference between the two annular structures (cooperating with the heating resistor composed of the conductive leather). Further, the heating electrode is set as a printed electrode and is adhesively fixed on the back surface of the conductive leather. Such a hidden design of the heating device electrode makes the steering wheel cover more comfortable to hold during use.

[0019] 3) Further, the conductive leather is set as an annular hollow sleeve body, the cross-section of the sleeve body is "C"-shaped, and sewing edges for sewing are symmetrically arranged on both sides of the inner circle of the sleeve body. Since the cross-section of the sleeve body is "C"-shaped and the sewing edges are almost non-conductive (after the conductive leather is cut, the contact between the cut edges will not conduct electricity), the positive annular heating electrode and the negative annular heating electrode are respectively arranged close to the sewing edges so that the positive annular heating electrode and the negative annular heating electrode form a heating resistance structure with uniform heating along the "C"-shape with the conductive leather body.

[0020] 4) Further, the positive annular heating electrode and the negative annular heating electrode are set as an annular structure surrounding the spokes of the vehicle steering wheel, which is beneficial to hiding the electrodes and to uniformly heating the entire conductive leather wrapping the steering wheel; further, the positive annular heating electrode and the negative annular heating electrode are arranged close to the inner circle of the spokes of the vehicle steering wheel, so as to make the most use of the conductive leather as a heating resistor, and the sleeve body is sewn on the vehicle steering wheel, and the cross-section of the sewn sleeve body is "O"-shaped, so that the conductive leather steering wheel cover is more firmly sleeved on the outer surface of the steering wheel, which is beneficial to the user to hold, and different from simple metal materials, after the conductive leather is cut, the cut edges cannot form a conductive structure by simply approaching each other. Description of the Drawings

[0021] In conjunction with the accompanying drawings and with reference to the following detailed description, the above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent, where:

[0022] Figure 1 FIG. 1 shows a cross-sectional schematic view of an electric heating device for an automotive steering wheel cover according to an embodiment of the present disclosure;

[0023] Figure 2 FIG. 2 shows a schematic view of a heating electrode of an electric heating device for an automotive steering wheel cover according to an embodiment of the present disclosure;

[0024] Figure 3 FIG. 3 shows a cross-sectional schematic view when the automotive steering wheel cover according to an embodiment of the present disclosure is sleeved on a steering wheel; and

[0025] In each of the drawings, the same or corresponding reference numerals denote the same or corresponding parts;

[0026] where the reference numerals are: electric heating device 100, conductive leather 10, insulating finish layer 10-1, conductive leather embryo layer 10-2, heating electrode 50, positive annular heating electrode 50-1, positive access terminal 50-2, negative annular heating electrode 50-3, negative access terminal 50-4, spoke 80 of the steering wheel, and suture 90. Detailed Embodiments

[0027] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0028] In the description of the embodiments of the present disclosure, the term "including" and its like should be understood as an open inclusion, that is, "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc. may refer to different or the same objects. There may also be other explicit and implicit definitions hereinafter.

[0029] The conductive leather technology used in this disclosure, for example, is the conductive leather mentioned in the patent document CN110957058A (A Conductive Leather and Its Preparation Method). This conductive leather uses natural leather as the matrix material, graphene as the conductive unit to construct a three-dimensional conductive network, and transition metal ions as the bridging agent to firmly bond the graphene and leather collagen fibers. Polyurethane prepolymers capped with isocyanate groups, foamed polyurethane, and sulfonate-based polyurethane are used as elastic supports to prepare highly elastic conductive leather, which has high conductivity and high elastic recovery. Specifically, graphite, transition metal ions Mn+, natural leather, polyurethane, etc. are used as raw materials. Transition metal ions are used as bridging agents to organically and firmly bond graphene and leather collagen fibers, and polyurethane is used as the support to synthesize a three-dimensional conductive network flexible leather substrate with high strain tolerance and elastic stability. It includes: 1) Preparation of highly conductive graphene oxide HGO; 2) Surface modification of highly conductive graphene oxide with transition metal ions to prepare highly dispersed modified graphene oxide; 3) Construction of a flexible conductive three-dimensional network with highly conductive graphene oxide, transition metal ions, and leather collagen fibers. 4) Addition of polyurethane prepolymer to construct elastic conductive leather.. By using the conductive leather technology in CN110957058A, the leather on the surface of the car steering wheel is made conductive. Then, positive and negative electrodes are printed on the back of the leather to make a heating pad. Finally, a decorative layer is sprayed on the front of the leather for insulation and decoration, obtaining a leather heating pad with both the ability of electric heating and surface decoration properties. Directly covering the leather heating pad on the steering wheel foam layer greatly simplifies the system structure of the existing electric heating steering wheel compared with the existing solutions.

[0030] The following further elaborates on each embodiment of the present disclosure with reference to the accompanying drawings.

[0031] Figure 1The cross-sectional schematic diagram of the electric heating device for an automotive steering wheel cover according to an embodiment of the present disclosure is shown. In the illustrated embodiment, an electric heating device 100 for an automotive steering wheel cover is shown. The electric heating device 100 includes: a conductive leather 10 and a heating electrode 50. The conductive leather 10 includes a front surface (the upward-facing surface in the illustration, an insulating finishing layer 10-1) and a back surface (the downward-facing surface in the illustration, a conductive leather embryo layer 10-2) for covering the outer surface of the spoke of the automotive steering wheel. The heating electrode 50 further includes a positive annular heating electrode 50-1, a positive access terminal 50-2 (not shown), a negative annular heating electrode 50-3, and a negative access terminal 50-4 (not shown). Apparently, in the illustrated embodiment, the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 are spaced apart and adhesively fixed to the back surface of the conductive leather 10 (the downward-facing surface in the illustration, the conductive leather embryo layer 10-2). The so-called positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 are spaced apart. As shown in the illustrated embodiment, there is a distance between the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3, such that the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 are electrically connected through the conductive leather, and the conductive leather functions as a heating resistance between the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3. Further, the general thickness and conductivity of the conductive leather are uniform. Then, as shown in the illustrated embodiment, the resistance of the conductive leather between the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 is also uniformly distributed. Thus, due to the potential difference and the heating resistance formed by the conductive leather between the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3, an electric heating structure (the electric heating device 100 for an automotive steering wheel cover) is formed.

[0032] In order to make full use of the characteristics that the conductivity of the conductive leather is relatively uniform and excellent, and to make full use of the heating resistance characteristics of the conductive leather, the following will be elaborated in detail with reference to the accompanying drawings.

[0033] Figure 2Shows a schematic diagram of a heating electrode of an electric heating device for an automotive steering wheel cover according to an embodiment of the present disclosure. In the illustrated embodiment, the conductive leather covering the automotive steering wheel is regarded as a heating resistor. Then, the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 are arranged in an annular structure. In the illustrated embodiment, in order to more clearly show the structures of the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3, the two heating electrodes are shown staggered. It should be understood that since the steering wheel is generally of an annular structure (disc structure), the automotive steering wheel cover is generally sleeved on the outer surface of this annular structure. Therefore, the in-use automotive steering wheel cover can also be of an annular structure, and the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 provided on the back surface of the automotive steering wheel cover (the surface in contact with the outer surface of the automotive steering wheel) should also be of an annular structure to facilitate the arrangement along the spokes of the automotive steering wheel. Further, as shown in the illustrated embodiment, in addition to the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3, the heating electrode 50 further includes a positive connection end 50-2 and a negative connection end 50-4; the positive connection end 50-2 is used to connect to the positive pole of an external power source, while the negative connection end 50-4 is used to connect to the negative pole of the external power source. It should be understood that for the purpose of heating (the purpose of forming an electric heating structure), the positive and negative poles of the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 can be interchanged and do not necessarily have to follow the positive and negative pole wiring. Correspondingly, the user or operator can, due to requirements of electrical safety and other vehicle-use standards or safety standards, limit that one end must be connected to the positive pole and the other end must be connected to the negative pole. In some embodiments, the positive connection end 50-2 is provided on the positive annular heating electrode 50-1; and the negative connection end 50-4 is provided on the negative annular heating electrode 50-3; in this way, when the power is turned on, a potential difference is formed between the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3, and the conductive leather 10 serves as a heating resistor to form an electric heating structure with the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3. More preferably, in some embodiments, the positive connection end 50-2 is arranged to be far from the negative connection end 50-4 because the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 as electrodes are not ideal electrodes (the resistance value is not zero), and the potential gradually decreases from the connection end to the position farthest from the connection end. In order to ensure that the potential difference between the corresponding two points between the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 is as close as possible to a fixed value, the positive connection end 50-2 and the negative connection end 50-4 are arranged to be the farthest apart.Further, in some embodiments, the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 are arranged as a pair of positive and negative electrodes with the same inner diameter in an annular structure. Then, for the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 with the same inner diameter in the annular structure, the distance of the conductive leather arranged between the two is the same (i.e., the resistance value of the heating resistor is the same). Then, by setting the positive access end 50-2 to be far from the negative access end 50-4, the potential difference between the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 of the electrode can also be the same across the entire heating electrode 50, thereby making the heating of the electric heating device more uniform, and preventing the user from having different thermal sensations when holding different parts due to uneven heating at a certain place. On the contrary, if the positive access end 50-2 and the negative access end 50-4 on the positive annular heating electrode 50-1 and the negative annular heating electrode 50-3 of the electrode are arranged to be the closest, then the potential difference between the two access ends closest to the positive access end 50-2 and the negative access end 50-4 is the largest, while the potential difference between the two at the farthest end is the smallest, resulting in the largest heating power near the positive access end 50-2 and the negative access end 50-4, and the smallest heating power far from the positive access end 50-2 and the negative access end 50-4, causing uneven heating distribution of the heating structure composed of the positive annular heating electrode 50-1, the negative annular heating electrode 50-3, and the conductive leather, and resulting in a poor user experience. It should be understood that the heating electrode is connected to an external power supply through the positive access end 50-2 and the negative access end 50-4. Further, in some embodiments, an insulating finish is sprayed on the front surface of the conductive leather to isolate the formation of an electrical conduction loop with the user's hand holding the steering wheel during use. Further, in some embodiments, the heating electrode 50 is arranged as a printed electrode and is adhesively fixed on the back surface of the conductive leather.

[0034] The following will be elaborated in detail in combination with the application scenario on an automotive steering wheel.

[0035] Figure 3 Fig. shows a cross-sectional schematic view when an automotive steering wheel cover according to an embodiment of the present disclosure is sleeved on a steering wheel. In this exemplary embodiment, from the perspective of the automotive steering wheel cover, the automotive steering wheel cover includes: the electric heating device as described above; and wherein the conductive leather is arranged as an annular hollow sleeve, and the cross-section of the sleeve is in a "C" shape, that is, from the perspective of the cross-section, the two open ends of the "C" shape are the sewing parts of the sleeve. Figure 3In this case, the stitched part is stitched together by the stitching thread 90), that is, the conductive leather is cut open. Only through the provided opening can the sleeve that fits and wraps the steering wheel tightly wrap the steering wheel. Then, by stitching and tightening the opening end between the stitched parts, that is, the stitched part, the car steering wheel cover changes from a "C" - shaped structure and finally becomes an "O" - shaped structure after being set (stitched) on the steering wheel. Further, in some embodiments, on both sides of the inner circle of the sleeve, there are symmetrically arranged stitching edges for stitching. The positive annular heating electrode and the negative annular heating electrode are respectively arranged close to the stitching edge. This is because for the example of conductive leather, after it is cut open (forming a stitching edge), if the cut stitching edges are simply brought close to each other, a conductive structure cannot be formed again. It can be regarded as the cut edges of ordinary leather being close to each other. Then, an electro - heating structure of positive and negative electrodes and a heating resistor is formed between the positive annular heating electrode and the negative annular heating electrode along the un - cut direction (i.e., the direction of the intact conductive leather). In particular, the positive annular heating electrode and the negative annular heating electrode are respectively arranged close to the stitching edge, so that the positive and negative electrodes can make more full use of the heating resistor area formed by the conductive leather, that is, the utilization rate of the conductive leather is improved.

[0036] Further, from the perspective of the steering wheel, as an example embodiment of an automotive steering wheel, the automotive steering wheel includes: the aforementioned automotive steering wheel cover; and the positive annular heating electrode and the negative annular heating electrode are arranged to surround the spoke 80 of the automotive steering wheel. Preferably, the positive annular heating electrode and the negative annular heating electrode are arranged close to the inner circle of the spoke 80 of the automotive steering wheel, and the sleeve (through the stitching thread 90) can be stitched on the automotive steering wheel, and the cross - section of the stitched sleeve is in the "O" shape shown in the figure.

[0037] For the sake of easy understanding, the above - mentioned electro - heating device for an automotive steering wheel cover, the steering wheel cover, and the steering wheel are further elaborated below.

[0038] In some embodiments, the manufacturing principles of an electric heating device for an automotive steering wheel cover, a steering wheel cover, and a steering wheel are proposed. Among them, Step 01: Manufacture a conductive leather embryo. For example, the conductive leather embryo is manufactured in the following manner; 1) Leather grinding; Place the leather on a leather grinding machine for grinding to remove the damaged parts on the upper and lower surfaces of the leather, and at the same time use a dust collector to remove the debris and fluff on the leather surface; 2) Primary tanning; Place the leather obtained in Step 1) in a rotating drum, add a conductive material, and then start the rotating drum to preliminarily tan and fill the conductive material into the pores of the leather. The primary tanning and filling time is 1h to 3h; 3) Secondary tanning; Add organic raw materials, penetrants, softeners, and deodorants to the rotating drum in Step 2) according to a certain volume ratio. First, tan for 1h to 2h under the condition of 0°C to 10°C, and then add a catalyst solution at 0°C to 10°C to the rotating drum and continue tanning for 3h to 6h for a polymerization reaction; After the polymerization reaction is completed, add a flame retardant to the rotating drum and continue tanning for 1h to 3h; Subsequently, wash, ultrasonically clean, dry, oscillate, and iron the leather on the front side after the secondary tanning to obtain a conductive leather with a flat surface. For a more specific manufacturing method, reference can be made to the prior patent CN117512234A; Step 02: Manufacture a leather heating pad. For example, first print positive and negative electrodes on the back of the conductive leather embryo through a flexible printed circuit process. The printing process uses screen printing, and the slurry used is a composite of nano silver and organic resin. In particular, the electrode width is determined according to the maximum current to be carried, generally 5 to 10 mm. In particular, the electrode spacing is determined according to the shape of the steering wheel, generally between 4 and 10 cm (refer to the leather piece cutting in Step 03). After the printed electrodes are dried and cured, they form a tight connection with the surface fibers of the conductive leather. Then, spray an insulating finishing layer on the front side of the conductive leather. The finishing layer can be customized according to customer requirements to achieve the desired appearance (color, feel, etc.); Step 03: Cutting. For different steering wheel styling designs, there are different shapes. The leather heating pad can be cut into corresponding leather pieces according to the shape. Accordingly, when considering the steering wheel covering in the next Step 04, sufficient space for sewing needs to be reserved. The distance between the printed electrodes and the edge of the leather piece needs to be greater than 5 mm, generally between 5 and 10 mm; Step 04: Manufacture a steering wheel cover. Circuit wiring stitches and joins the leather pieces into a steering wheel cover, and then uses wires or flexible circuits to connect the positive and negative electrodes of each leather heating pad leather piece in series together to form a loop through methods such as hot press welding and bonding. Finally, lead wires are connected at the positive and negative electrodes on both sides that are symmetric left and right, and connecting to the positive and negative poles of the power supply can power on for heating. This wiring method ensures that the voltage difference between the positive and negative poles is uniform, further ensuring the uniformity of the heating effect; Step 05: Steering wheel covering. Treat the steering wheel cover completed in the previous step as a conventional genuine leather steering wheel cover and cover it on the steering wheel according to conventional covering processes such as gluing and sewing. The cross-section of the final electric heating steering wheel product is as Figure 3 shown.

[0039] The electric heating device, steering wheel cover or steering wheel for an automobile steering wheel cover in the above embodiments has the following advantages: 1. A better heating experience. Through the layout of the above electric heating steering wheel structure, the heat conduction process from the original resistance wire heating pad to the leather layer is omitted. At the same time, compared with metal electric heating wires, the leather material itself has lower thermal inertia, so that a faster heating speed and a lower heating power can be achieved; on this basis, uniform heating of the conductive leather as the sleeve body can be realized. 2. A simpler covering process and a lower system cost. The original leather surface layer and the resistance wire heating pad are combined into a leather heating pad, omitting the original resistance wire heating pad, reducing the material cost, and enabling the covering process to follow the covering process of the steering wheel without an electric heating function. The covering process is simpler and the yield is higher.

[0040] The embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications or technical improvements in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

[0041] The above are only optional embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. An electric heating device for a car steering wheel cover, characterized in that: include: Conductive leather, including a front surface and a back surface for covering the outer surface of the spoke of the automobile steering wheel; The heating electrode comprises a positive annular heating electrode, a positive access terminal, a negative annular heating electrode and a negative access terminal; The positive annular heating electrode and the negative annular heating electrode are arranged in an annular structure and are pasted to the back surface of the conductive leather at intervals.

2. The electric heating device according to claim 1, characterized in that: The positive access terminal is arranged on the positive annular heating electrode; the negative access terminal is arranged on the negative annular heating electrode, and the positive access terminal is arranged to be far away from the negative access terminal.

3. The electric heating device according to claim 2, characterized in that: The positive annular heating electrode and the negative annular heating electrode are configured to form a pair of positive and negative electrodes of annular structures with the same inner diameter.

4. The electric heating device according to claim 1, characterized in that: The heating electrode is connected to an external power source through the positive access terminal and the negative access terminal.

5. The electric heating device according to claim 1, characterized in that: The front surface of the conductive leather is sprayed with an insulating coating layer.

6. The electric heating device according to claim 1, characterized in that: The heating electrode is configured as a printed electrode and is adhered and fixed to the back surface of the conductive leather.

7. A car steering wheel cover, characterized in that: include: The electric heating device according to any one of claims 1 to 6; The conductive leather is configured as an annular hollow casing, and the cross section of the casing is "C" shaped.

8. The automobile steering wheel cover according to claim 7, characterized in that: Both sides of the inner ring of the sleeve are symmetrically provided with sewing edges for sewing, and the positive annular heating electrode and the negative annular heating electrode are respectively arranged close to the sewing edges.

9. A car steering wheel, characterized in that: include: The automobile steering wheel cover as claimed in claim 7 or 8; The positive annular heating electrode and the negative annular heating electrode are arranged to surround the spokes of the automobile steering wheel.

10. The automobile steering wheel according to claim 9, characterized in that: The positive annular heating electrode and the negative annular heating electrode are arranged close to the inner ring of the spokes of the automobile steering wheel, and the sleeve is sewn on the automobile steering wheel, and the cross-section of the sewn sleeve is "O"-shaped.

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