Sensing pad and steering wheel

Abstract

The induction pad comprises an induction layer, the induction layer comprises a first induction area and a second induction area, the first induction area and the second induction area are arranged in an insulated mode, and at least part of the second induction area is located in the first induction area; wherein the first sensing area and the second sensing area are used for sensing electric signals. In the embodiment of the utility model, when the induction pad covers the steering wheel, the first induction area is aligned with the annular inner ring of the steering wheel, and the second induction area is aligned with the annular outer ring of the steering wheel, so that the holding state of a driver can be judged according to the induction electric signals of the first induction area and the second induction area, and the accuracy of identifying the holding state of the driver is improved; the probability of false alarm or missing alarm is reduced, and potential safety hazards are reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to steering wheel technical field, in particular to a kind of induction pad and steering wheel. BACKGROUND

[0002] With the continuous development of intelligent driving technology, steering wheel hand-off detection technology is also continuously developed. Steering wheel hand-off detection technology refers to a technology for detecting whether a driver holds a steering wheel in real time through a sensor or an inductor.

[0003] Currently, steering wheel hand-off detection technology is generally capacitive induction hand-off detection technology, which forms a capacitive loop with the driver's hand and the steering wheel hand-off induction pad coated on the steering wheel to identify whether the driver holds the steering wheel, i.e., when the driver holds or does not hold the steering wheel, the capacitance of the steering wheel hand-off induction pad will change accordingly to identify whether the driver holds the steering wheel.

[0004] However, the above-mentioned steering wheel hand-off induction pad usually has a single sensing area, and only the driver's holding of the steering wheel can be determined by the capacitance change of the single sensing area, and the driver's holding state (e.g., when the driver tightly holds the steering wheel, both hands hold the ring-shaped inner and outer circles of the steering wheel; when the driver lightly touches the steering wheel, one hand or both hands lightly touch the ring-shaped outer circle of the steering wheel) cannot be determined, resulting in low accuracy of the steering wheel hand-off induction pad in identifying the driver's holding state, causing false positives or false negatives, thereby easily causing safety hazards. For example, when the accuracy of the steering wheel hand-off induction pad in identifying the driver's holding state is low, if the driver switches from tightly holding the steering wheel to lightly touching the steering wheel, the capacitance signal changes from strong to weak, and the steering wheel hand-off induction pad is easily identified as the driver not holding the steering wheel, and the automatic driving is switched, which conflicts with the driver's light-touch driving, and easily causes safety hazards. UTILITY MODEL CONTENTS

[0005] The embodiment of the utility model aims to provide an induction pad and a steering wheel, which have a first sensing area and a second sensing area, can improve the accuracy of identifying the driver's holding state, reduce the probability of false positives or false negatives, and reduce safety hazards.

[0006] To solve the above technical problems, an embodiment of the utility model adopts one technical scheme: providing an induction pad, including a sensing layer, the sensing layer includes a first sensing area and a second sensing area, the first sensing area and the second sensing area are insulated, and at least part of the second sensing area is located inside the first sensing area; wherein the first sensing area and the second sensing area are used for sensing electric signals.

[0007] Optionally, the inner edge of the first sensing area and the outer edge of the second sensing area are spaced apart.

[0008] Optionally, the first induction area is arranged in a ring shape with a gap, and the second induction area is arranged in a strip shape matched with the first induction area.

[0009] Optionally, the induction pad further comprises a first connecting line and a second connecting line, the first induction area is electrically connected with the first connecting line, the second induction area is electrically connected with the second connecting line, the second connecting line is arranged adjacent to the gap, and the second connecting line is arranged in insulation with the first induction area.

[0010] Optionally, the induction layer comprises a conductive sheet, a first adhesive sheet and a first insulating sheet, the conductive sheet, the first adhesive sheet and the first insulating sheet are sequentially stacked along a first direction, the first adhesive sheet adhesively fixes the conductive sheet and the first insulating sheet, and the first direction is a thickness direction of the induction layer.

[0011] Optionally, the induction pad comprises a shielding layer, and the induction layer is stacked above the shielding layer along the first direction.

[0012] Optionally, the shielding layer comprises a second adhesive sheet, a grounding sheet, a third adhesive sheet and a second insulating sheet, the second adhesive sheet, the grounding sheet, the third adhesive sheet and the second insulating sheet are sequentially stacked along the first direction, the first insulating sheet is stacked above the second adhesive sheet along the first direction, the second adhesive sheet adhesively fixes the first insulating sheet and the grounding sheet, and the third adhesive sheet adhesively fixes the grounding sheet and the second insulating sheet.

[0013] Optionally, the induction pad further comprises a heating layer, the shielding layer is stacked above the heating layer along the first direction, and the heating layer is used for heating the induction layer.

[0014] Optionally, the heating layer comprises a heating sheet, a fourth adhesive sheet and an isolation sheet, the heating sheet, the fourth adhesive sheet and the isolation sheet are sequentially stacked along the first direction, the second insulating sheet is stacked above the heating sheet along the first direction, the heating sheet is fixed to the second insulating sheet, the fourth adhesive sheet adhesively fixes the heating sheet and the isolation sheet, and the isolation sheet is used for contacting a steering wheel.

[0015] To solve the above technical problems, another technical scheme adopted by the embodiment of the utility model provides a kind of steering wheel, including framework and above-mentioned induction pad, the framework is annular, the induction pad is covered in the framework, the first induction area of the induction pad is aligned with the annular inner ring of the framework, and the second induction area of the induction pad is aligned with the annular outer ring of the framework.

[0016] The beneficial effects of this utility model embodiment are as follows: Unlike existing technologies, this utility model embodiment provides a sensing pad, including a sensing layer. The sensing layer includes a first sensing area and a second sensing area, which are insulated from each other. At least a portion of the second sensing area is located inside the first sensing area. The first and second sensing areas are used to sense electrical signals. In this utility model embodiment, when the sensing pad covers the steering wheel, the first sensing area is aligned with the inner annular ring of the steering wheel, and the second sensing area is aligned with the outer annular ring of the steering wheel. This allows for the determination of the driver's grip state based on the sensed electrical signals from the first and second sensing areas, improving the accuracy of identifying the driver's grip state, reducing the probability of false alarms or missed alarms, and minimizing safety hazards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this utility model or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the sensing layer of the sensing pad provided in this embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the sensing layer of the sensing pad provided in this embodiment of the present invention covering the steering wheel;

[0020] Figure 3 This is a schematic diagram of the sensing layer winding of the sensing pad provided in this embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the sensing layer of the sensing pad provided in this embodiment of the present invention being wound around the steering wheel;

[0022] Figure 5 This is a schematic diagram of the structure of the sensing pad provided in this embodiment of the utility model. Figure 1 ;

[0023] Figure 6 This is a schematic diagram of the structure of the sensing pad provided in this embodiment of the utility model. Figure 2 ;

[0024] Figure 7 This is a schematic diagram of the structure of the sensing pad provided in this embodiment of the utility model. Figure 3 ;

[0025] Figure 8 This is a schematic diagram of the structure of the sensing pad and the skeleton provided in the embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Sensing pad, 11. Sensing layer, 111. First sensing area, 112. Second sensing area, 113. Conductive sheet, 114. First adhesive sheet, 115. First insulating sheet, 12. Shielding layer, 121. Second adhesive sheet, 122. Grounding sheet, 123. Third adhesive sheet, 124. Second insulating sheet, 13. Heating layer, 131. Heating sheet, 132. Fourth adhesive sheet, 133. Isolation sheet, 14. First buffer layer, 15. Second buffer layer, 16. Leather layer, 17. First connecting wire, 18. Second connecting wire;

[0028] 10. Steering wheel;

[0029] 100 sensor pad, 200 frame;

[0030] X is the first direction. Detailed Implementation

[0031] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when a piece is described as being "fixed" to another piece, it can be directly on the other piece, or one or more intermediate pieces can exist between them. When a piece is described as being "connected" to another piece, it can be directly connected to the other piece, or one or more intermediate pieces can exist between them. The terms "upper," "lower," "inner," "outer," "vertical," and "horizontal," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or piece referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0033] With the continuous development of intelligent driving technology, steering wheel hands-off detection technology is also constantly evolving. Steering wheel hands-off detection technology refers to a technology that uses sensors or inductors to detect in real time whether the driver's hands are on the steering wheel.

[0034] Currently, steering wheel hands-off detection technology is generally capacitive sensing hands-off detection technology. It uses the driver's hand and the steering wheel hands-off sensing pad covering the steering wheel to form a capacitive circuit to identify whether the driver is holding the steering wheel. That is, when the driver is holding the steering wheel or not holding the steering wheel, the capacitance of the steering wheel hands-off sensing pad will change accordingly, thereby identifying whether the driver is holding the steering wheel.

[0035] However, the aforementioned steering wheel hands-off sensor pads are typically single-sensing areas. By detecting changes in capacitance within this single area, they can only determine whether the driver is holding the steering wheel, not the driver's grip style (e.g., when the driver is gripping the steering wheel firmly, both hands simultaneously hold the inner and outer rings; when the driver is lightly touching the steering wheel, one or both hands lightly touch the outer ring). This results in low accuracy in recognizing the driver's grip style, leading to false alarms or missed alarms, potentially causing safety hazards. For example, if the steering wheel hands-off sensor pad's accuracy is low, and the driver switches from gripping the steering wheel firmly to lightly touching it, the capacitance signal changes from strong to weak. The sensor pad might mistakenly interpret this as the driver not holding the steering wheel, switching to automatic driving, which conflicts with the driver's light touch and could lead to a safety hazard.

[0036] Based on this, this utility model provides an embodiment of a sensing pad 100, which can improve the accuracy of recognizing the driver's grip state, reduce the probability of false alarms or missed alarms, and reduce safety hazards.

[0037] To facilitate the reader's understanding of the concept of this utility model embodiment, the specific structure of the sensing pad 100 is described below:

[0038] Please see Figures 1 to 4 A sensing pad 100 includes a sensing layer 11, the sensing layer 11 including a first sensing area 111 and a second sensing area 112, the first sensing area 111 and the second sensing area 112 being insulated from each other, and at least a portion of the second sensing area 112 being located inside the first sensing area 111; wherein the first sensing area 111 and the second sensing area 112 are used to sense electrical signals.

[0039] To facilitate the reader's understanding of the concept of this utility model embodiment, the following example illustrates the use of the sensing pad 100: Please refer to... Figures 2 to 4When the sensing pad 100 covers the steering wheel, the first sensing area 111 is aligned with the inner ring of the steering wheel, and the second sensing area 112 is aligned with the outer ring of the steering wheel. If the driver's grip on the steering wheel is light, the driver's one or both hands only contact the outer ring of the steering wheel, that is, the driver's one or both hands only contact the second sensing area 112 and not the first sensing area 111. At this time, only the second sensing area 112 has a sensing signal, and the first sensing area 111 does not have a sensing signal. If the driver's grip on the steering wheel is firm, the driver's one or both hands simultaneously contact both the inner and outer rings of the steering wheel, that is, the driver's one or both hands simultaneously contact the first sensing area 111 and the second sensing area 112. At this time, both the first sensing area 111 and the second sensing area 112 have sensing signals.

[0040] Compared to the single sensing area of ​​a traditional steering wheel off-hand sensor pad, in this embodiment of the invention, the sensor pad 100 forms a non-single sensing area structure through a first sensing area 111 and a second sensing area 112. The first sensing area 111 and the second sensing area 112 can independently sense the capacitance changes in different areas, and then determine the driver's grip state based on the induced electrical signals of the first sensing area 111 and the second sensing area 112. This improves the accuracy of identifying the driver's grip state on the steering wheel, accurately identifies whether the driver is gripping the steering wheel tightly, lightly touching the steering wheel, or not gripping the steering wheel, reduces the probability of false alarms or missed alarms, and reduces safety hazards.

[0041] Regarding the aforementioned sensor pad 100, it should be noted that the sensor pad 100 includes, but is not limited to, being covered and fixed to the steering wheel by adhesive means, such as using double-sided tape, self-adhesive or other types of adhesive to fix the sensor pad 100 to the steering wheel.

[0042] Regarding the aforementioned sensor pad 100, it should also be noted that the sensor pad 100 further includes a processor, which includes, but is not limited to, being externally located on the steering wheel or internally located on the steering wheel. The sensing layer 11 of the sensor pad 100 is electrically connected to the processor of the sensor pad via a wiring harness to transmit electrical signals.

[0043] Regarding the aforementioned sensing layer 11, please refer to [link / reference] in some embodiments. Figure 1 The inner edge of the first sensing area 111 and the outer edge of the second sensing area 112 are spaced apart. In this manner, the first sensing area 111 and the second sensing area 112 maintain a good distance, reducing mutual interference caused by their close proximity during sensing. This avoids signal interference between the first sensing area 111 and the second sensing area 112, thereby improving the independence of the sensing signal and enhancing sensing accuracy.

[0044] Regarding the aforementioned sensing layer 11, please refer to [link / reference] in some embodiments.Figure 1 The first sensing area 111 is configured as an annular shape with a notch, and the second sensing area 112 is configured as a strip shape that matches the shape of the first sensing area 111. In this manner, when the sensing pad 100 covers the steering wheel, the first sensing area 111 can be aligned with the inner annular ring of the steering wheel, and the second sensing area 112 can be aligned with the outer annular ring of the steering wheel, so that the sensing pad 100 can cover different gripping areas of the steering wheel, improving the accuracy of recognizing the driver's gripping state on the steering wheel.

[0045] For the aforementioned sensor pad 100, please refer to Figure 1 The sensing pad 100 also includes a first connecting line 17 and a second connecting line 18. The first sensing area 111 is electrically connected to the first connecting line 17, and the second sensing area 112 is electrically connected to the second connecting line 18. The second connecting line 18 is positioned adjacent to a notch and is insulated from the first sensing area 111. Through this method, the first connecting line 17 and the second connecting line 18 can maintain the independence of the electrical signal transmission of the first sensing area 111 and the second sensing area 112, respectively. Furthermore, by positioning the second connecting line 18 adjacent to the notch and is insulated from the first sensing area 111, signal interference suffered by the second connecting line 18 during signal transmission can be reduced, improving the stability and accuracy of signal transmission.

[0046] Regarding the aforementioned sensing layer 11, please refer to [link / reference] in some embodiments. Figure 5 and Figure 6 The sensing layer 11 includes a conductive sheet 113, a first adhesive sheet 114, and a first insulating sheet 115. The conductive sheet 113, the first adhesive sheet 114, and the first insulating sheet 115 are stacked sequentially along a first direction X. The first adhesive sheet 114 bonds and fixes the conductive sheet 113 and the first insulating sheet 115. The first direction X is the thickness direction of the sensing layer 11. The first insulating sheet 115 carries the conductive sheet 113, and the first adhesive sheet 114 bonds and fixes the conductive sheet 113 and the insulating sheet 115. This improves the robustness of the internal structure of the sensing layer 11, reduces the probability of displacement of the internal structure of the sensing layer 11, and helps the sensing layer 11 maintain good sensing accuracy.

[0047] Furthermore, in some embodiments of the aforementioned sensing layer 11, the conductive sheet 113 is a conductive cloth made of nickel-plated polyester fiber, the first adhesive sheet 114 is a double-sided adhesive of elastomeric pressure-sensitive adhesive, and the first insulating sheet 115 is an insulator made of polyethylene resin.

[0048] For the aforementioned sensor pad 100, please refer to Figure 5The sensing pad 1 includes a shielding layer 12, which is stacked on top of the shielding layer 11 along a first direction X. In this manner, the shielding layer 12 forms an electromagnetic shielding space for the sensing layer 11, which can improve the anti-interference capability of the sensing layer 11 and ensure the stability and reliability of capacitive signal sensing.

[0049] Regarding the shielding layer 12 described above, please refer to [link / reference] in some embodiments. Figure 5 and Figure 6 The shielding layer 12 includes a second adhesive sheet 121, a grounding sheet 122, a third adhesive sheet 123, and a second insulating sheet 124. The second adhesive sheet 121, the grounding sheet 122, the third adhesive sheet 123, and the second insulating sheet 124 are stacked sequentially along the first direction X. The first insulating sheet 115 is stacked on top of the second adhesive sheet 121 along the first direction X. The second adhesive sheet 121 bonds and fixes the first insulating sheet 115 and the grounding sheet 122. The third adhesive sheet 123 bonds and fixes the grounding sheet 122 and the second insulating sheet 124.

[0050] Furthermore, in some embodiments of the shielding layer 12, the second adhesive sheet 121 is a double-sided adhesive of elastomeric pressure-sensitive adhesive, the grounding sheet 122 is a conductive cloth of nickel-plated polyester fiber, the third adhesive sheet 123 is a double-sided adhesive of thermoplastic polyurethane substrate film, and the second insulating sheet 124 is a mesh cloth of polyester fiber.

[0051] For the aforementioned sensor pad 100, please refer to Figure 5 The sensing pad 1 also includes a heating layer 13, and a shielding layer 12 is stacked on top of the heating layer 13 along a first direction X. The heating layer 13 is used to heat the sensing layer 11. In this way, the heating layer 13 enables the sensing pad 100 to have a heating function, thereby improving the comfort of the driver when contacting the sensing pad 100 while holding the steering wheel, especially suitable for cold climates. In addition, in this way, the shielding layer 12 isolates the sensing layer 11 and the heating layer 13, thereby reducing electromagnetic interference from the heating layer 13 to the sensing layer 11.

[0052] Regarding the heating layer 13 described above, please refer to [link / reference] in some embodiments. Figure 5 and Figure 6 The heating layer 13 includes a heating element 131, a fourth adhesive sheet 132, and an isolation sheet 133. The heating element 131, the fourth adhesive sheet 132, and the isolation sheet 133 are stacked sequentially along the first direction X. The second insulating sheet 124 is stacked on the heating element 131 along the second direction Y. The heating element 131 is fixed to the second insulating sheet 124. The fourth adhesive sheet 132 bonds and fixes the heating element 131 and the isolation sheet 133. The isolation sheet 133 is used to contact the steering wheel.

[0053] Furthermore, regarding the heating layer 13, in some embodiments, the heating element 131 is a copper alloy heating wire, which is fixed to the polyester fiber mesh by stitching, so that the heating element 131 is fixed to the second insulating sheet 124, the fourth adhesive sheet 132 is a double-sided adhesive of elastomeric pressure-sensitive adhesive, and the isolation sheet 133 is a waterproof and high-temperature resistant silicone paper.

[0054] For the aforementioned sensor pad 100, please refer to Figure 7 The sensing pad 1 includes a first buffer layer 14, and a heating layer 13 is stacked on the first buffer layer 14 along a first direction X. The first buffer layer 14 is used to contact the steering wheel. In this way, the first buffer layer 14 can buffer the heating layer 13, reducing wear on the heating layer 13 during long-term use. In some embodiments, the first buffer layer 14 is foam cotton.

[0055] For the aforementioned sensor pad 100, please refer to Figure 7 The sensing pad 1 includes a second buffer layer 15, which is stacked on the sensing layer 11 along a first direction X. In this manner, the second buffer layer 15 can cushion the sensing layer 11, reducing wear and tear during long-term use. In some embodiments, the second buffer layer 15 is made of foam.

[0056] For the aforementioned sensor pad 100, please refer to Figure 7 The sensing pad 1 includes a protective layer 16, which is stacked on the second buffer layer 15 along a first direction X. In this manner, the protective layer 16 protects the second buffer layer 15, reducing damage caused by friction or impact. In some embodiments, the protective layer 16 is made of leather.

[0057] This embodiment of the invention provides a sensing pad 100, including a sensing layer 11. The sensing layer 11 includes a first sensing area 111 and a second sensing area 112. The first sensing area 111 and the second sensing area 112 are insulated from each other, and at least a portion of the second sensing area 112 is located inside the first sensing area 111. The first sensing area 111 and the second sensing area 112 are used to sense electrical signals. In this embodiment, when the sensing pad 100 covers the steering wheel, the first sensing area 111 is aligned with the inner annular ring of the steering wheel, and the second sensing area 112 is aligned with the outer annular ring of the steering wheel. The driver's grip state can be determined based on the sensed electrical signals from the first sensing area 111 and the second sensing area 112, improving the accuracy of identifying the driver's grip state, reducing the probability of false alarms or missed alarms, and minimizing safety hazards.

[0058] This utility model also provides an embodiment of a steering wheel; please refer to [link / reference]. Figure 8The steering wheel includes a frame 200 and the aforementioned sensor pad 100. The frame 200 is annular, and the sensor pad 100 covers the frame 200. The first sensing area 111 of the sensor pad is aligned with the inner annular ring of the frame 200, and the second sensing area 112 of the sensor pad is aligned with the outer annular ring of the frame 200. For the specific structure and function of the sensor pad 100, please refer to the above embodiments; they will not be repeated here.

[0059] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An inductive pad, characterized by The inductive pad comprises: an inductive layer, the inductive layer comprising a first inductive region and a second inductive region, the first inductive region being arranged in insulation with the second inductive region, at least part of the second inductive region being located inside the first inductive region; wherein the first inductive region and the second inductive region are used for inducting an electric signal.

2. The inductive pad according to claim 1, wherein: an inner edge of the first inductive region is arranged in interval with an outer edge of the second inductive region.

3. The inductive pad according to claim 1 or 2, wherein: the first inductive region is arranged in a ring shape with a notch, and the second inductive region is arranged in a strip shape matching the shape of the first inductive region.

4. The inductive pad according to claim 3, wherein: the inductive pad further comprises a first connecting line and a second connecting line, the first inductive region is electrically connected with the first connecting line, the second inductive region is electrically connected with the second connecting line, the second connecting line is arranged adjacent to the notch, and the second connecting line is arranged in insulation with the first inductive region.

5. The inductive pad according to claim 1, wherein: the inductive layer comprises a conductive sheet, a first adhesive sheet and a first insulating sheet, the conductive sheet, the first adhesive sheet and the first insulating sheet are sequentially stacked along a first direction, the first adhesive sheet adhesively fixes the conductive sheet and the first insulating sheet, and the first direction is a thickness direction of the inductive layer.

6. The inductive pad according to claim 5, wherein: the inductive pad comprises a shielding layer, and the inductive layer is stacked above the shielding layer along the first direction.

7. The inductive pad according to claim 6, wherein: the shielding layer comprises a second adhesive sheet, a grounding sheet, a third adhesive sheet and a second insulating sheet, the second adhesive sheet, the grounding sheet, the third adhesive sheet and the second insulating sheet are sequentially stacked along the first direction, the first insulating sheet is stacked above the second adhesive sheet along the first direction, the second adhesive sheet adhesively fixes the first insulating sheet and the grounding sheet, and the third adhesive sheet adhesively fixes the grounding sheet and the second insulating sheet.

8. The inductive pad according to claim 7, wherein: the inductive pad further comprises a heating layer, the shielding layer is stacked above the heating layer along the first direction, and the heating layer is used for heating the inductive layer.

9. The inductive pad according to claim 8, wherein: the heating layer comprises a heating sheet, a fourth adhesive sheet and an isolation sheet, the heating sheet, the fourth adhesive sheet and the isolation sheet are sequentially stacked along the first direction, the second insulating sheet is stacked above the heating sheet along the first direction, the heating sheet is fixed to the second insulating sheet, the fourth adhesive sheet adhesively fixes the heating sheet and the isolation sheet, and the isolation sheet is used for contacting a steering wheel.

10. A steering wheel, characterized by The inductive pad comprises a skeleton and an inductive pad as claimed in any one of claims 1-9, the skeleton is in a ring shape, the inductive pad is wrapped on the skeleton, a first inductive region of the inductive pad is aligned with an inner ring of the skeleton, and a second inductive region of the inductive pad is aligned with an outer ring of the skeleton.

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