Heating device with HOD sensing function, steering wheel and vehicle

Abstract

The utility model belongs to the technical field of automobile accessories, and discloses a heating device with an HOD sensing function, a steering wheel and a vehicle, and the heating device comprises a flexible cushion and a heating assembly; the heating assembly is laid on the flexible pad and comprises a heating loop, a negative electrode of the heating loop is connected with a signal line, and the signal line is used for collecting capacitance changes of the heating loop at the positive electrode and the negative electrode. The signal line is arranged and is connected with the heating loop on the flexible pad, so that capacitance detection is directly carried out, structures such as a traditional induction layer and a traditional shielding layer are omitted, the heating function of the HOD function is integrated on the single-layer flexible pad, the structure of the heating device is effectively simplified, the heating device is convenient to manufacture, and meanwhile the cost of the heating device is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a heating device with HOD sensing function, a steering wheel, and a vehicle. Background Technology

[0002] HOD (Hands-Off Detection) technology is a crucial automotive safety technology designed to monitor in real time whether the driver takes their hands off the steering wheel while driving, thus ensuring that the driver maintains effective control of the vehicle at all times. Currently, most car steering wheels on the market integrate the HOD function into the steering wheel heating element. However, to avoid the heating element interfering with HOD detection, these steering wheels typically have a shielding layer between the two, resulting in a two- or multi-layered structure, higher cost, and more complex manufacturing process. Utility Model Content

[0003] The first objective of this invention is to provide a heating device with HOD induction function, which is simple in structure, easy to manufacture, and low in cost.

[0004] To achieve this objective, the present invention adopts the following technical solution: a heating device with HOD sensing function, comprising a flexible pad and a heating component; the heating component is laid on the flexible pad, the heating component includes a heating circuit, the negative terminal of the heating circuit is connected to a signal line, and the signal line is used to collect the capacitance change of the heating circuit at the positive and negative terminals.

[0005] Preferably, there are two heating circuits, which are spaced apart in the width direction of the flexible pad.

[0006] Preferably, the heating circuit includes heating wires in a serpentine shape, and the serpentine heating wires are arranged in a matrix on the flexible pad.

[0007] Preferably, the heating wires are provided in multiple manner, and the negative terminals of the multiple heating wires are connected to the same signal line.

[0008] Preferably, the heating device with HOD sensing function further includes a temperature sensor, the detection end of which is positioned facing the heating circuit.

[0009] Preferably, the temperature sensor is configured as a thermistor.

[0010] The second objective of this invention is to provide a steering wheel that integrates HOD (Heating, Dispensing) and heating functions, with a simple structure and low cost.

[0011] To achieve this objective, the present invention adopts the following technical solution: a steering wheel, including the above-mentioned heating device with HOD sensing function.

[0012] The third objective of this utility model is to provide a vehicle in which the steering wheel integrates HOD and heating functions, and has a simple structure and low cost.

[0013] To achieve this objective, the present invention adopts the following technical solution: a vehicle, including the aforementioned steering wheel.

[0014] The beneficial effects of this invention are as follows: When the user's hand comes into contact with the heating circuit, the positive and negative terminals of the heating circuit can be approximated as a capacitor in a discharging state. The voltage or current on the signal line will change with the capacitance changes at the positive and negative terminals. The signal line transmits these weak change signals to the controller on the steering wheel to achieve HOD detection. By setting up a signal line that connects to the heating circuit on the flexible pad, capacitance detection can be performed directly, eliminating the need for traditional sensing layers, shielding layers, and other structures. This integrates the heating function of the HOD function onto a single layer of flexible pad, effectively simplifying the structure of the heating device, facilitating its manufacturing, and reducing its cost. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the heating device of this utility model;

[0016] Figure 2 This is a circuit diagram of the present invention.

[0017] In the diagram: 100, heating component; 110, heating circuit; 111, heating wire; 120, signal line; 200, temperature sensor. Detailed Implementation

[0018] The present invention 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 present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0022] Reference Figure 1 and Figure 2 As shown, a heating device with HOD sensing function provided according to an embodiment of this application includes a flexible pad and a heating component 100. Optionally, the flexible pad may include rubber, leather, etc., which will not be described in detail here. The heating component 100 is laid on the flexible pad and includes a heating circuit 110. The negative terminal of the heating circuit 110 is connected to a signal line 120, which is used to collect the capacitance change of the heating circuit 110 at the positive and negative terminals. Specifically, the flexible pad covers the steering wheel frame of the vehicle, and the steering wheel is equipped with an HOD controller (ECU). The HOD controller includes a capacitance-to-digital converter circuit, and the signal line 120 is connected to the capacitance-to-digital converter circuit to collect the capacitance change of the heating circuit 110 at the positive and negative terminals. Since the HOD controller market is mature and there are many mature products to choose from, the HOD controller and its related circuits are not specifically limited here, as long as they can receive and process the capacitance change signal emitted by the signal line 120.

[0023] It is understandable that when the user's hand is in contact with the heating circuit 110, the positive and negative terminals of the heating circuit 110 can be approximated as a capacitor in a discharging state. When the user's hand is removed from the heating circuit 110, the positive and negative terminals of the heating circuit 110 can be approximated as a capacitor in a charging state (the amount of charge transfer is very small and will be amplified by the capacitor excitation signal circuit in the capacitor digital conversion circuit. This is specifically stated here to avoid misunderstanding). The voltage or current on the signal line 120 will change with the change of capacitance at the positive and negative terminals. The signal line 120 transmits these weak change signals to the controller on the steering wheel to realize HOD detection.

[0024] By setting up signal line 120, which is connected to heating circuit 110 on the flexible pad, capacitance detection can be performed directly, eliminating the need for traditional induction layer, shielding layer and other structures. This integrates the heating function of HOD function onto a single layer of flexible pad, effectively simplifying the structure of the heating device, facilitating the manufacturing of the heating device, and reducing the cost of the heating device.

[0025] Furthermore, the heating device with HOD sensing function also includes a temperature sensor 200, the detection end of which is set toward the heating circuit 110, and both the temperature sensor 200 and the heating circuit 110 are connected to the HOD controller.

[0026] By setting a temperature sensor 200, the temperature sensor 200 can detect the temperature of the heating circuit 110 in real time and then feed it back to the HOD controller. The HOD controller controls the power of the heating circuit 110 in real time according to the temperature feedback from the temperature sensor 200, so as to achieve constant temperature control of the heating circuit 110 and effectively improve the user experience.

[0027] Furthermore, the flexible mat is configured as a fabric. Alternatively, the flexible mat can be made of non-woven fabric, with the heating circuit 110 sewn onto the non-woven fabric.

[0028] The flexible pad is made of non-woven fabric. Non-woven fabric is flexible, inexpensive, and breathable, which makes it easy for users to tightly wrap the flexible pad onto the steering wheel frame, improving the ease of assembly of the heating device.

[0029] Reference Figure 1 As shown, it can be understood that there are two heating circuits 110, which are spaced apart in the width direction of the flexible pad.

[0030] The car's steering wheel has an upper section facing the user and a lower section facing away from the user along its height. Two heating circuits 110 are configured, spaced apart along the width of a flexible pad. When the user installs the heating device, one heating circuit 110 covers the upper section of the steering wheel along with the flexible pad, and the other heating circuit 110 covers the lower section of the steering wheel along with the flexible pad, achieving a two-zone arrangement of the heating device. At this time, the signal lines 120 of the two heating circuits 110 work together to detect the user's hand grip status.

[0031] Specifically, when the user grips the steering wheel, their hand is in contact with both the upper and lower heating circuits 110. The capacitors formed at the positive and negative terminals of both the upper and lower heating circuits 110 are in a discharging state, and the signal lines 120 of both heating circuits 110 collect the capacitor discharge signal. The HOD controller determines that the user's hand is in a gripping state. When the user's hand rests on either the upper or lower heating circuit, the capacitors formed at the positive and negative terminals of the heating circuit 110 in contact with the user's hand are in a discharging state, while the capacitors formed at the positive and negative terminals of the heating circuit 110 in the lower or upper heating circuit that is not in contact with the hand are in a charging state. The HOD controller determines that the user's hand is in a resting state and can determine the position of the user's hand on the steering wheel. When the user's hand leaves the steering wheel, the capacitors formed at the positive and negative terminals of both the upper and lower heating circuits 110 are in a charging state, and the HOD controller determines that the user's hand is detached.

[0032] By setting up two heating circuits 110 and having their signal lines 120 work together, the user's grip state can be detected more accurately, effectively improving the accuracy of HOD sensing.

[0033] Furthermore, the heating circuit 110 includes a heating wire 111 made of resistance wire. The heating wire 111 has a serpentine shape and is arranged in a matrix on the flexible pad. In other words, after the serpentine heating wire 111 extends along the length of the flexible pad for a period of time, it will bend at 90° for a short period of time, and then bend at 90° again to extend in the opposite direction for a period of time until the heating circuit 110 covers half of the area of ​​the flexible pad (when only one heating circuit 110 is provided, the matrix-extended heating circuit 110 covers the surface of the flexible pad).

[0034] By setting up serpentine heating wires 111 and extending them in a matrix, the overlap area between the heating wires 111 and the flexible pad can be effectively increased. This ensures that after the flexible pad covers the steering wheel frame, the heating wires 111 have sufficient heating area for heating, guaranteeing the heating and heat preservation effect of the heating device and further improving the user experience.

[0035] Furthermore, multiple heating wires 111 are provided, and the negative terminals of multiple heating wires 111 are connected to the same signal line 120. Multiple heating wires 111 extending in a matrix form interlock with each other.

[0036] By setting multiple heating wires 111, the problem of excessively long individual heating wires 111, which would make it difficult to manufacture, process, and arrange the heating circuit 110, is avoided. This reduces the arrangement cost of the heating circuit 110 while ensuring that the heating circuit 110 has a sufficient heating area.

[0037] Reference Figure 2 As shown, it can be understood that the temperature sensor 200 is configured as a thermistor, which is also connected to the HOD controller. Optionally, when there are two heating circuits 110, the thermistors can be set one-to-one with the heating circuits 110, or a single thermistor can be set on one side of one of the heating circuits 110.

[0038] Configuring the temperature sensor 200 as a thermistor simplifies its structure and reduces the cost of the heating device. Furthermore, the thermistor can be integrated into the circuit of the HOD controller and placed inside the steering wheel, effectively improving the integration of the heating device.

[0039] A steering wheel according to an embodiment of this application includes an HOD controller, a leather covering, and a heating device with HOD sensing function. The heating circuit 110 and signal line 120 of the heating device are electrically connected to the HOD controller. The flexible pad of the heating device covers the steering wheel, and the leather covering covers the flexible pad and the heating circuit 110.

[0040] The steering wheel provided in this embodiment of the present invention includes the heating device with HOD sensing function described above. Therefore, the steering wheel provided in this embodiment of the present invention also has the beneficial effects described in the above embodiments, which will not be repeated here.

[0041] A vehicle according to an embodiment of this application includes a power source and the aforementioned steering wheel, wherein the power source is connected to an HOD controller on the steering wheel.

[0042] The vehicle provided in this embodiment of the present invention includes the steering wheel described above. Therefore, the vehicle provided in this embodiment of the present invention also possesses the beneficial effects described in the above embodiments, which will not be repeated here.

[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A heating device with HOD induction function, characterized in that, include: Flexible mat; A heating component (100) is laid on the flexible pad. The heating component (100) includes a heating circuit (110). The negative terminal of the heating circuit (110) is connected to a signal line (120). The signal line (120) is used to collect the capacitance change of the heating circuit (110) at the positive and negative terminals.

2. A heating device with HOD sensing function according to claim 1, characterized in that, Two heating circuits (110) are provided, and the two heating circuits (110) are spaced apart in the width direction of the flexible pad.

3. A heating device with HOD sensing function according to claim 1 or 2, characterized in that, The heating circuit (110) includes a heating wire (111) which has a serpentine shape and is arranged in a matrix on the flexible pad.

4. A heating device with HOD induction function according to claim 3, characterized in that, The heating wire (111) is provided in multiple ways, and the negative terminals of the multiple heating wires (111) are connected to the same signal line (120).

5. A heating device with HOD sensing function according to claim 1 or 2, characterized in that, The heating device with HOD sensing function also includes a temperature sensor (200), the detection end of which is positioned facing the heating circuit (110).

6. A heating device with HOD induction function according to claim 5, characterized in that, The temperature sensor (200) is configured as a thermistor.

7. A heating device with HOD induction function according to claim 1, characterized in that, The flexible pad is configured as a fabric.

8. A steering wheel, characterized in that, The heating device with HOD sensing function as described in any one of claims 1-7.

9. A vehicle, characterized in that, Includes the steering wheel as described in claim 8.

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