Steering wheel functional pad body
By using a stitching structure or sealing layer to fix the steering wheel functional pad in the reserved area, the problem of easy delamination of the pad in the existing technology is solved, ensuring the stability and aesthetics of the covering process.
Patent Information
- Application Number
- CN202423294224.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing automotive steering wheel functional pad has a thick and complex interlayer structure, which makes it easy to delaminate when covering the steering wheel, affecting the aesthetics of subsequent foaming and leather covering.
The first and second functional pads are stacked together. By setting reserved areas on both sides or around the longitudinal direction, and fixing them with stitching structures or sealing layers in the reserved areas, delamination is avoided.
It effectively prevents the steering wheel function pad from delaminating during the covering process, improving the quality and aesthetics of subsequent foaming and leather covering.
Smart Images
Figure CN223763984U_ABST
Abstract
Description
Technical Field
[0001] This disclosure generally relates to the field of steering wheel cushion technology, and specifically to a steering wheel functional cushion. Background Technology
[0002] Current car steering wheels generally have heating pads, sensor pads, multi-layer heating pads, or a combination of sensor pads and heating pads. The interlayer structure of these functional pads mainly consists of at least two layers, often bonded together with double-sided adhesive. However, due to the thickness of the pads and the complexity of the multi-layer structure, after being wrapped on the steering wheel, some areas have a large curvature due to the shape, and the layers are prone to delamination, affecting the secondary foaming or leather wrapping in the next process. Utility Model Content
[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a steering wheel function pad to solve the above problems.
[0004] This application provides a steering wheel functional cushion, including: a first functional cushion and a second functional cushion;
[0005] The first functional pad includes a first substrate layer and a first functional layer, with the first functional layer disposed above the first substrate layer; the second functional pad includes a second substrate layer and a second functional layer, with the second functional layer disposed above the second substrate layer.
[0006] The first substrate layer includes a first functional area and a first reserved area. The first functional area is disposed in the middle of the first substrate layer, and the first reserved area is disposed on the longitudinal sides or around the first functional area. The second substrate layer includes a second functional area and a second reserved area. The second functional area is disposed in the middle of the second substrate layer, and the second reserved area is disposed on the longitudinal sides or around the second functional area.
[0007] The first functional layer is configured within the first functional area, and the second functional layer is configured within the second functional area;
[0008] The first functional pad and the second functional pad are stacked, with the first functional pad positioned above the second functional pad. The first reserved area and the second reserved area overlap to form a reserved area. Partially or entirely of the reserved area is provided with an edge sealing structure, and partially or entirely of the side of the reserved area is provided with an adhesive layer, so that the first reserved area and the second reserved area fit tightly together, preventing local stretching and delamination when wrapped on the steering wheel.
[0009] According to the technical solution provided in the embodiments of this application, the edge sealing structure is a stitched structure.
[0010] According to the technical solution provided in the embodiments of this application, the stitching structure includes a bottom thread and a top thread. The top thread is disposed in the first reserved area on the side close to the first functional layer, and the bottom thread is disposed in the second reserved area on the side away from the first reserved area.
[0011] According to the technical solution provided in the embodiments of this application, the bottom line and the top line are straight lines.
[0012] According to the technical solution provided in the embodiments of this application, the bottom line and the top line are Z-shaped traces or sawtooth traces.
[0013] According to the technical solution provided in the embodiments of this application, the stitching structure has a stretchable overlocking structure, which does not affect the stretching of the functional pad body when covering the steering wheel as required.
[0014] According to the technical solution provided in the embodiments of this application, the overlock structure is a triangular single-line overlock structure or a slanted needle overlock structure.
[0015] According to the technical solution provided in the embodiments of this application, the first functional pad is a sensing pad, the second functional pad is a heating pad, and a shielding layer is disposed between the heating pad and the sensing pad to prevent the heating pad working chamber from affecting the sensitivity of the sensing pad.
[0016] According to the technical solution provided in the embodiments of this application, adhesive layers are provided on both sides of the shielding layer to fix the shielding layer between the sensing pad and the heating pad; the second functional layer of the heating pad is a heating wire, which is disposed on the side of the second substrate layer away from the first substrate layer to avoid electrical conduction between the heating pad and the shielding layer.
[0017] According to the technical solution provided in the embodiments of this application, the first functional layer of the sensing pad is a metal cloth or a metal wire.
[0018] Compared with the prior art, the beneficial effects of this application are as follows: by setting reserved areas on both sides or around the longitudinal direction of the steering wheel functional pad, and by setting edge sealing structures in part or all of the reserved areas and or by setting adhesive layers in part or all of the reserved areas, the steering wheel functional pad is fixed to the area on the steering wheel that is prone to delamination by the edge sealing structure or adhesive layers, so that the steering wheel functional pad will not delaminate when it is covered on the steering wheel, and the subsequent secondary foaming or leather covering process is easier and more aesthetically pleasing. Attached Figure Description
[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0020] Figure 1This is a schematic diagram of the structure of the first functional pad.
[0021] Figure 2 This is a schematic diagram of the structure of the second functional pad;
[0022] Figure 3 This is a schematic diagram of the structure of the first substrate layer;
[0023] Figure 4 This is a schematic diagram of the structure of the second substrate layer;
[0024] Figure 5 This is an exploded view of the structure of a steering wheel functional cushion body in Example 1;
[0025] Figure 6 This is a partially enlarged schematic diagram of a steering wheel functional cushion body in Embodiment 1;
[0026] Figure 7 This is a partially enlarged schematic diagram of the Z-shaped or serrated structure of a steering wheel functional pad in Embodiment 1;
[0027] Figure 8 This is an exploded view of the structure of a steering wheel functional cushion body in Example 2;
[0028] Figure 9 This is a partially enlarged schematic diagram of a steering wheel functional cushion in Embodiment 2;
[0029] Figure 10 This is an exploded view of the structure of a steering wheel functional cushion body in Example 3;
[0030] Figure 11 This is a partially enlarged schematic diagram of a steering wheel functional cushion body in Example 3;
[0031] Figure 12 This is a partially enlarged schematic diagram of the Z-shaped or serrated structure of a steering wheel functional pad in Embodiment 3;
[0032] Figure 13 This is a schematic diagram of the structure of a steering wheel functional cushion in Example 4;
[0033] Figure 14 This is a schematic diagram of the structure of a steering wheel functional cushion in Example 5;
[0034] Figure 15 A schematic diagram of a stitching structure for a bottom line and a top line;
[0035] Figure 16 A schematic diagram of another stitching structure for the bottom and top lines;
[0036] Figure 17 This is an exploded view of the structure of a steering wheel functional cushion body in Example 6;
[0037] Figure 18 This is an exploded view of the structure of another steering wheel functional cushion in Example 6;
[0038] Figure 19 This is a schematic diagram of the structure of a steering wheel functional cushion in Example 6;
[0039] Figure 20 This is an exploded view of the structure of a steering wheel functional cushion body in Example 7;
[0040] Figure 21 This is an exploded view of the structure of another steering wheel functional cushion in Example 7;
[0041] Figure 22 This is a schematic diagram of the structure of a steering wheel functional cushion in Example 7;
[0042] Figure 23 This is a structural schematic diagram of a steering wheel functional cushion body in Example 8;
[0043] Figure 24 This is a schematic diagram of another type of steering wheel functional cushion in Example 8;
[0044] Figure 25 This is a partially enlarged schematic diagram of a steering wheel functional cushion body in Example 8;
[0045] Figure 26 This is a partially enlarged schematic diagram of another type of steering wheel functional cushion in Example 8;
[0046] Figure 27 This is a structural schematic diagram of a steering wheel functional cushion body in Example 9;
[0047] Figure 28 This is a schematic diagram of another type of steering wheel functional cushion in Example 9;
[0048] Reference numerals: 1. First functional pad; 2. Second functional pad; 3. Reserved area; 4. Edge sealing structure; 5. Sealing layer; 6. Shielding layer; 7. Adhesive layer; 11. First substrate layer; 12. First functional layer; 21. Second substrate layer; 22. Second functional layer; 41. Sewing structure; 111. First functional area; 112. First reserved area; 121. Metal cloth; 122. Metal wire; 211. Second functional area; 212. Second reserved area; 221. Heating wire; 411. Straight stitch; 412. Z-shaped stitch; 413. Serrated stitch; 414. Overlock structure; 4111. Bottom thread; 4112. Top thread; 4141. Triangular single-line overlock structure; 4142. Oblique needle overlock structure. Detailed Implementation
[0049] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.
[0050] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0051] Figure 1 This is a schematic diagram of the structure of the first functional pad 1. Figure 3 This is a schematic diagram of the structure of the first substrate layer: The first functional pad 1 can be either a heating pad or a sensing pad. As can be seen from the diagram, the longer direction of the pad is longitudinal. Figure 1 The first functional pad 1 includes a first substrate layer 11 and a first functional layer 12. Figure 3 A first reserved area 112 is provided in the longitudinal direction of the first substrate layer 11 or around the perimeter of the pad, and the middle part is the first functional area 111. Figure 1 The first functional area 111 is provided with a first functional layer 12, which can be a heating wire or a metal wire 122. If it is a heating wire, it is used for heating the steering wheel; if it is a metal wire 122, it is used for sensing and detecting the steering wheel.
[0052] Figure 2 This is a schematic diagram of the structure of the second functional pad 2. Figure 4 This is a schematic diagram of the structure of the second substrate layer: the second functional pad 2 is a heating pad, and it can be seen from the figure that the longer direction of the pad is longitudinal. Figure 2 The second functional pad 2 includes a second substrate layer 21 and a second functional layer 22, in Figure 4 The second substrate layer 21 has a second reserved area 212 in the longitudinal direction or around the perimeter of the pad, and the middle is a second functional area 211. The second functional area 211 is provided with a second functional layer 22, which is a heating wire 221 for heating the steering wheel. Example
[0053] Please refer to Figure 5-7 This embodiment provides a steering wheel functional cushion, such as Figure 5 As shown: The steering wheel functional cushion includes an upper first functional cushion 1 and a lower second functional cushion 2. The detailed structure of the first functional cushion 1 and the second functional cushion 2 is described above. Figure 1 and Figure 2The detailed structure has been explained and will not be repeated here; the first energy pad 1 can be either a heating pad or a sensing pad, and the second energy pad 2 is also a heating pad. When the first energy pad 1 is a heating pad, this type of steering wheel functional pad is used for enhanced heating, with double-layer heating for better heating effect; when the first energy pad 1 is a sensing pad, this type of steering wheel functional pad can be used for both heating and off-hand detection, where the first energy pad 1 is used for off-hand detection of the steering wheel, and the second energy pad 2 is used for heating the steering wheel.
[0054] In the reserved area 3 of this type of steering wheel functional pad, the first functional pad 1 and the second functional pad 2 are sewn together with thread, so that the first functional pad 1 and the second functional pad 2 are tightly fixed together and will not separate when covered on the steering wheel.
[0055] The suturing method for the reserved area 3 is a straight stitch 411 suturing (such as...) Figure 6 ), Z-shaped routing 412, sawtooth routing 413 (such as...) Figure 7 The straight stitch 411 appears as a straight line or dotted line when viewed from both the front and back. Within the reserved area 3, the straight stitch 411 can be multiple stitches or a single stitch. Multiple stitches allow for tighter side seams on the pad, making it less prone to sealing. The zigzag stitch 412 or serrated stitch 413 appears as continuous zigzag or serrated stitches when viewed from both the front and back. By stitching back and forth at a certain distance, almost the entire reserved area 3 has stitches in the transverse direction, which allows for tighter side seams on the pad, making it less prone to sealing, ensuring product function and quality, and improving product reliability.
[0056] The aforementioned stitching methods include bottom thread 4111 and top thread 4112, as detailed below. Figure 15 and 16 As shown, one method is as follows Figure 15 As shown: the top thread 4112 is set at the top of the first functional pad 1 and then bends through the entire pad; the bottom thread 4111 is set at the bottom of the second functional pad 2 and passes through all the bends of the top thread 4112. Finally, the bottom thread 4111 and the top thread 4112 are tightened, and the bottom thread 4111 and the top thread 4112 intersect each other at the bottom of the second pad, while locking the bottom thread 4111 and the top thread 4112 so that they do not separate. The bottom thread 4111 remains at the bottom, and the top thread 4112 remains inside and on top of the pad; another method is as follows... Figure 16 As shown: suture method and Figure 15 The method is the same, the difference is that when tightening, the bottom line 4111 and the top line 4112 use the same method, and the bottom line 4111 and the top line 4112 intersect in the middle of the pad, rather than under the second functional pad 2 above. Example
[0057] Please refer to Figure 8-9 This embodiment provides a steering wheel functional cushion, such as Figure 8 As shown: The steering wheel functional cushion includes an upper first functional cushion 1 and a lower second functional cushion 2. The detailed structure of the first functional cushion 1 and the second functional cushion 2 is described above. Figure 1 and Figure 2 The detailed structure has been explained and will not be repeated here; the first energy pad 1 can be either a heating pad or a sensing pad, and the second energy pad 2 is also a heating pad. When the first energy pad 1 is a heating pad, this type of steering wheel functional pad is used for enhanced heating, with double-layer heating for better heating effect; when the first energy pad 1 is a sensing pad, this type of steering wheel functional pad can be used for both heating and off-hand detection, where the first energy pad 1 is used for off-hand detection of the steering wheel, and the second energy pad 2 is used for heating the steering wheel.
[0058] In this type of steering wheel functional pad, the first functional pad 1 and the second functional pad 2 are bonded together by a sealing layer 5 on the side of the reserved area 3. This makes the first functional pad 1 and the second functional pad 2 tightly fixed together. The sealing layer 5 is an edge sealing adhesive, which has a good bonding effect and is elastic after solidification. It is used to seal the edge of the pad. At the edge of the pad that is prone to delamination, the edge sealing adhesive is used to bond the edge together, which can also solve the problem of delamination. Example
[0059] Please refer to Figure 10-12 This embodiment provides a steering wheel functional cushion, such as Figure 8 As shown: The proposed steering wheel functional pad is based on embodiment 1, with an added sealing layer 5 on the side of the reserved area 3. Through the double reinforcement of the edge sealing structure 4 and the sealing layer 5, the first functional pad 1 and the second functional pad 2 are tightly fixed together. The combination of sewing and sealing effectively avoids the delamination of the pad and also prevents burrs, making the structure at the edge of the pad more stable and further improving the product's service life and product quality reliability. Example
[0060] Please refer to Figure 13This embodiment provides a steering wheel functional pad: the steering wheel functional pad includes a partially set edge sealing structure 4, which is used to cover areas of the steering wheel prone to delamination, particularly the three o'clock and nine o'clock positions. The edge sealing structure 4 can be a stitching structure 41 or a locking structure 414. The stitching form of the stitching structure 41 can be a straight stitch 411, a Z-shaped stitch 412, or a serrated stitch 413. For details on the stitching methods of straight stitch 411, Z-shaped stitch 412, and serrated stitch 413, please refer to the stitching methods described in Embodiment 1, which will not be repeated here. The locking structure 414 can be a variety of locking methods, such as two-line binding seam, two-line standard round rolled edge stitch, three-line binding seam, three-line flat seam binding, three-line binding seam, four-line telescopic simulated safety stitch, etc., or other triangular single-line locking structures 4141 (see details). Figure 25 ), oblique stitch overlock structure 4142 (see details) Figure 26 Depending on the material and requirements, a flexible edge-locking method that does not affect stretching should be selected for edge locking and fixing. Alternatively, an adhesive layer 5 can be added to the side after setting the edge sealing structure 4 for double fixing.
[0061] This method of setting a sealing structure 4 or adding a sealing layer 5 in only a localized area does not affect the solution to the delamination problem of the pad, and can reduce the number of processes and save costs, achieving a dual effect. Example
[0062] Please refer to Figure 14 This embodiment provides a steering wheel functional pad: the steering wheel functional pad includes a partial reserved area 3 with a sealing layer 5 on the side. This partial position is where the steering wheel pad covers the areas of the steering wheel that are prone to delamination, especially the three o'clock and nine o'clock positions of the steering wheel. By setting an adhesive layer with good adhesion and elasticity after solidification at this position, the sealing adhesive partially bonds the edges of the pad together, which also solves the problem of delamination of the pad. Example
[0063] Please refer to Figure 17-19 This embodiment provides a steering wheel functional pad: the steering wheel functional pad is a functional pad with an integrated heating and sensing structure, including an upper first functional pad 1 as a sensing pad and a lower second functional pad 2 as a heating pad, and an intermediate shielding layer 6; the first functional pad 1, the second functional pad 2 and the intermediate shielding layer 6 are bonded and fixed to each other by an adhesive layer; wherein the first functional layer 12 on the first functional pad 1 is a metal wire 122 (see details). Figure 17 ), or metal cloth 121 (see details) Figure 18The shielding layer 6 can be metal cloth or metal wire, generally metal cloth, in order to make the steering wheel pad relatively thin. The second functional layer 22 is arranged on the side of the second functional pad 2 away from the first functional pad, which can effectively prevent the second functional layer 22 from being electrically mixed with the shielding layer and failing. The first functional pad 1 and the second functional pad 2 are sewn together with thread in the reserved area 3, so that the first functional pad 1 and the second functional pad 2 are tightly fixed together and will not delaminate when covered on the steering wheel.
[0064] The suturing method for the reserved area 3 is a straight stitch 411 suturing (such as...) Figure 6 ), Z-shaped routing 412, sawtooth routing 413 (such as...) Figure 7 The straight stitch 411 appears as a straight line or dotted line when viewed from both the front and back. Within the reserved area 3, the straight stitch 411 can be multiple stitches or a single stitch. Multiple stitches allow for tighter side seams on the pad, making it less prone to delamination. The zigzag stitch 412 or serrated stitch 413 appears as continuous zigzag or serrated stitches when viewed from both the front and back. By stitching back and forth at a certain distance, almost the entire reserved area 3 has stitches in the transverse direction, which allows for tighter side seams on the pad, making it less prone to delamination, ensuring product function and quality, and improving product reliability.
[0065] The aforementioned stitching methods include bottom thread 4111 and top thread 4112, as detailed below. Figure 15 and 16 As shown, one method is as follows Figure 15 As shown: the top thread 4112 is set at the top of the first functional pad 1 and then bends through the entire pad; the bottom thread 4111 is set at the bottom of the second functional pad 2 and passes through all the bends of the top thread 4112. Finally, the bottom thread 4111 and the top thread 4112 are tightened, and the bottom thread 4111 and the top thread 4112 intersect each other at the bottom of the second pad, while locking the bottom thread 4111 and the top thread 4112 so that they do not separate. The bottom thread 4111 remains at the bottom, and the top thread 4112 remains inside and on top of the pad; another method is as follows... Figure 16 As shown: suture method and Figure 15 The method is the same, the difference is that when tightening, the bottom line 4111 and the top line 4112 use the same method, and the bottom line 4111 and the top line 4112 intersect in the middle of the pad, rather than under the second functional pad 2 above. Example
[0066] Please refer to Figure 20-22This embodiment provides a steering wheel functional pad: the steering wheel functional pad is a functional pad with an integrated heating and sensing structure, including an upper first functional pad 1 as a sensing pad and a lower second functional pad 2 as a heating pad, and an intermediate shielding layer 6; the first functional pad 1, the second functional pad 2 and the intermediate shielding layer 6 are bonded and fixed to each other by an adhesive layer; wherein the first functional layer 12 on the first functional pad 1 is a metal wire 122 (see details). Figure 20 ), or metal cloth 121 (see details) Figure 21 The shielding layer 6 can be metal cloth or metal wire, generally metal cloth, to make the steering wheel pad relatively thin. The second functional layer 22 is arranged on the side of the second functional pad 2 away from the first functional pad, which can effectively prevent the second functional layer 22 from being electrically mixed with the shielding layer and failing. The side of the reserved area 3 is bonded to the first functional pad 1 and the second functional pad 2 by the sealing layer 5, so that the first functional pad 1 and the second functional pad 2 are tightly fixed together. The sealing layer 5 is an edge sealing adhesive, which has a good bonding effect and is elastic after solidification. It is used to seal the edge of the pad. At the edge of the pad that is prone to delamination, the edge sealing adhesive is used to bond the edge together, which can also solve the delamination problem. Example
[0067] Please refer to 23-26. This embodiment provides a steering wheel functional pad: the steering wheel functional pad is a functional pad with an integrated heating and sensing structure, including an upper first functional pad 1 as a sensing pad and a lower second functional pad 2 as a heating pad, and an intermediate shielding layer 6; the first functional pad 1, the second functional pad 2 and the intermediate shielding layer 6 are bonded and fixed to each other by an adhesive layer; wherein the first functional layer 12 on the first functional pad 1 is a metal wire 122 (see details). Figure 23 ), or metal cloth 121 (see details) Figure 24 The shielding layer 6 can be metal cloth or metal wire, generally metal cloth, to make the steering wheel pad relatively thin. The second functional layer 22 is arranged on the side of the second functional pad 2 away from the first functional pad, which can effectively prevent the second functional layer 22 from electrically mixing with the shielding layer and failing. The reserved area 3 is fixed to the first functional pad 1 and the second functional pad 2 on the side by the locking structure 414, wherein the locking structure 414 can be a triangular single-line locking structure 4141 (see details). Figure 25 ) or oblique stitch overlock structure 4142 (see details) Figure 26 The edge-locking structure 414 refers to locking the edge of the reserved area 3 of the pad with a thread. The thread can be diagonally crossed, hooked, or covered with a stitch. The stitch can be any type of single thread, double thread, three thread, four thread, or five thread. This edge-locking structure 414 can not only prevent the pad from delaminating but also prevent rough edges. Example
[0068] Please refer to Figure 27-28 This embodiment provides a steering wheel functional pad: This embodiment is a combination of the stitching structure 41 and the sealing layer in the reserved area 3 of Embodiments 6 and 7. That is, in the reserved area 3, not only is the stitching structure 41 used to fix the layers, but a sealing layer 5 is also provided on the side of the reserved area 3, which can not only strengthen the prevention of separation between layers, but also effectively prevent rough edges.
[0069] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.
Claims
1. A steering wheel function pad body, characterized by, The utility model relates to a functional pad, including: A first functional pad (1) and a second functional pad (2); The first functional pad (1) includes a first base material layer (11) and a first functional layer (12), and the first functional layer (12) is arranged above the first base material layer (11); the second functional pad (2) includes a second base material layer (21) and a second functional layer (22), and the second functional layer (22) is arranged above the second base material layer (21); The first base material layer (11) includes a first functional area (111) and a first reserved area (112), the first functional area (111) is arranged in the middle of the first base material layer (11), and the first reserved area (112) is arranged on the longitudinal both sides or the periphery of the first functional area (111); the second base material layer (21) includes a second functional area (211) and a second reserved area (212), the second functional area (211) is arranged in the middle of the second base material layer (21), and the second reserved area (212) is arranged on the longitudinal both sides or the periphery of the second functional area (211); The first functional layer (12) is arranged in the first functional area (111), and the second functional layer (22) is arranged in the second functional area (211); The first functional pad (1) and the second functional pad (2) are arranged in layers, and the first functional pad (1) is arranged above the second functional pad (2), wherein the first reserved area (112) and the second reserved area (212) overlap to form a reserved area (3), and part or all of the reserved area (3) is provided with a sealing edge structure (4) and / or part or all of the side of the reserved area (3) is provided with a sealing glue layer (5), so that the first reserved area (112) and the second reserved area (212) are closely attached, and local partial stretching when being wrapped on a steering wheel is avoided.
2. A steering wheel function pad according to claim 1, characterized in that The sealing edge structure (4) is a stitching structure (41).
3. A steering wheel function pad according to claim 2, wherein The stitching structure (41) includes a bottom thread (4111) and a face thread (4112), the face thread (4112) is arranged on the side of the first reserved area (112) close to the first functional layer (12), and the bottom thread (4111) is arranged on the side of the second reserved area (212) away from the first reserved area (112).
4. A steering wheel function pad according to claim 3, wherein The bottom thread (4111) and the face thread (4112) are in a straight line (411).
5. A steering wheel function pad according to claim 3, wherein The bottom thread (4111) and the face thread (4112) are in a zigzag line (413) or a sawtooth line (413).
6. A steering wheel function pad according to claim 2, wherein The stitching structure (41) has a stretchable lock edge structure (414).
7. A steering wheel function pad according to claim 6, wherein The lock edge structure (414) is a triangular single-thread lock edge structure (4141) or an oblique needle lock edge structure (4142).
8. A steering wheel function pad as claimed in any one of claims 1 to 7, wherein, The first functional pad (1) is an induction pad, the second functional pad (2) is a heating pad, and a shielding layer (6) is arranged between the heating pad and the induction pad.
9. A steering wheel function pad according to claim 8, wherein, The shielding layer (6) is provided with adhesive layers (7) on both sides, so that the shielding layer (6) is fixed between the induction pad and the heating pad; the second functional layer (22) of the heating pad is a heating wire (221), and the heating wire (221) is arranged on the second base material layer (21) away from the first base material layer (11).
10. A steering wheel function pad according to claim 9, wherein The first functional layer (12) of the induction pad is a metal cloth (121) or a metal wire (122).