A steering wheel hands-off detection device

Abstract

The utility model provides a steering wheel hand -off detection device, include: steering wheel subassembly, including steering wheel outer ring seat, slide hole, slide column, contact seat and micro -switch in steering wheel subassembly, compare with prior art, the utility model has the following beneficial effect: through increasing steering wheel subassembly, upper shell subassembly and lower shell subassembly, upper shell subassembly and lower shell subassembly are covered and set in steering wheel outer ring seat outside, the driver both hands hold steering wheel, and the uniform transmission of pressure passes through elastic buffer layer and flexible pressure conduction zone, overcomes reset spring elasticity and drives slide column to go down, makes contact seat and micro -switch contact and makes it " close " with, and micro -switch and slide column structure are evenly provided with four groups, to improve driving safety, through increasing steering wheel subassembly, upper shell subassembly and lower shell subassembly, upper shell subassembly and lower shell subassembly pre -with steering wheel subassembly snap, then realize splicing fixed, can be convenient to dismouting use.

Description

Technical Field

[0001] This utility model belongs to the field of automotive safety technology, and specifically relates to a steering wheel hands-off detection device. Background Technology

[0002] With technological advancements, automobiles are becoming increasingly intelligent and safer. Cars require drivers to operate the steering wheel for directional control. However, dangerous behaviors can occur while driving, such as drivers taking their hands off the steering wheel to perform other operations. This results in a lack of directional control, especially at high speeds and when the vehicle veers off course, potentially leading to loss of control and accidents. Modern cars often incorporate hands-off detection mechanisms in the steering wheel area to detect this safety hazard. However, most vehicles rely on steering torque, allowing drivers to easily avoid warnings with minimal torque application. This method fails to accurately detect hand contact, and drivers can easily deceive the system by suspending heavy objects on the steering wheel, posing a serious safety risk. Some solutions embed capacitive sensors within the steering wheel rim to detect hand proximity, but this approach is costly, its signal is susceptible to environmental temperature and humidity fluctuations, exhibiting poor stability, and requires complex signal processing circuitry, increasing system complexity and failure rate.

[0003] In summary, we hope to propose a new structure to solve the aforementioned technical problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a steering wheel off-hand detection device to solve the problems mentioned in the background technology.

[0005] This utility model is achieved through the following technical solution: a steering wheel off-hand detection device, comprising: a steering wheel assembly, wherein the steering wheel assembly includes a steering wheel outer ring seat, a sliding hole, a sliding column, a contact seat, and a micro switch;

[0006] The outer side of the steering wheel outer ring seat has four sets of sliding holes evenly distributed in a circle at both the upper and lower ends. A sliding column is inserted through the center of the inner side of the sliding hole. A contact seat is fixedly connected to one end of the sliding column near the center of the steering wheel outer ring seat. A micro switch is fixedly installed at the center of the steering wheel outer ring seat.

[0007] An upper outer shell assembly is installed on the upper outer side of the outer ring of the steering wheel, and a lower outer shell assembly is installed on the lower outer side of the outer ring of the steering wheel. Both the upper and lower outer shell assemblies include an elastic buffer layer and a flexible pressure transmission band.

[0008] In a preferred embodiment, the flexible pressure transmission belt of the upper outer shell assembly is fixedly connected to the upper outer shell body at one end away from the center of the steering wheel outer ring seat, and the flexible pressure transmission belt of the lower outer shell assembly is fixedly connected to the lower outer shell body at one end away from the center of the steering wheel outer ring seat.

[0009] In a preferred embodiment, the elastic buffer layer is fixedly connected at one end near the center of the outer rim of the steering wheel, and a capacitive sensing sheet is fixedly connected at the other end of the elastic buffer layer near the center of the outer rim of the steering wheel. When a hand approaches, the capacitance value of the capacitive sensing sheet changes, and the capacitive sensing sheet is used for auxiliary detection.

[0010] In a preferred embodiment, the capacitive sensing sheet is a flexible thin-film circuit, the flexible pressure transmission strip is made of ultra-high molecular weight polyethylene, and the elastic buffer layer is made of silicone. Pressure can be uniformly transmitted through the elastic buffer layer and the flexible pressure transmission strip.

[0011] In a preferred embodiment, a return spring is provided on the inner side of the sliding hole located on the outer side of the sliding column, the micro switch is used to realize the control of the switch signal change, and a steering wheel center seat is fixedly connected to the center position of the steering wheel outer ring seat.

[0012] In a preferred embodiment, the four sets of microswitches are distributed in an equally divided structure on the left front side, right front side, left rear side and right rear side, and the outer surfaces of the upper shell body and the lower shell body are provided with grooves.

[0013] In a preferred embodiment, a set of inserts is fixedly connected to both the left and right ends of the inner side of the upper outer shell and the lower outer shell, and a set of slots is provided on both the left and right ends of the outer side of the steering wheel outer ring seat, with the inserts and slots fitting together.

[0014] In a preferred embodiment, four sets of circumferentially distributed locking blocks are fixedly connected to the lower surface of the upper outer shell body, and four sets of locking slots are correspondingly opened on the upper surface of the lower outer shell body. The locking blocks and the locking slots are engaged with each other. Both the lower surface of the upper outer shell body and the upper surface of the lower outer shell body are also provided with connecting threaded holes. The upper outer shell assembly and the lower outer shell assembly are pre-engaged with the steering wheel assembly. Then, the engaging structure of the upper outer shell assembly and the lower outer shell assembly is spliced ​​together and fixed by screws and connecting threaded holes, thereby facilitating disassembly and assembly.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are:

[0016] 1. By adding a steering wheel assembly, an upper shell assembly, and a lower shell assembly, which are installed on the outer side of the steering wheel outer rim, the driver's hands grip the steering wheel. The pressure is evenly transmitted through the elastic buffer layer and the flexible pressure transmission belt, overcoming the spring force of the return spring and causing the sliding column to move downward, so that the contact seat contacts the micro switch and "closes". The micro switch and sliding column structure are evenly arranged in four sets. In addition, a capacitive sensing sheet is added. When the hand approaches, the capacitance value of the capacitive sensing sheet changes, realizing auxiliary detection and thus improving driving safety.

[0017] 2. By adding a steering wheel assembly, an upper housing assembly, and a lower housing assembly, the upper and lower housing assemblies are pre-engaged with the steering wheel assembly. Then, the engagement structure of the upper and lower housing assemblies is used to splice them together, and they are fixed by screws and connecting threaded holes, which makes it easy to disassemble and use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a steering wheel hands-off detection device according to the present invention.

[0020] Figure 2 This is a schematic diagram of the steering wheel assembly in a steering wheel hands-off detection device according to the present invention.

[0021] Figure 3 This is a partial cross-sectional schematic diagram of the steering wheel assembly in the steering wheel hands-off detection device of this utility model.

[0022] Figure 4 This is a schematic diagram of the upper outer shell assembly in a steering wheel hands-off detection device of this utility model.

[0023] Figure 5 This is a schematic diagram of the lower outer shell assembly in a steering wheel hands-off detection device according to the present invention.

[0024] In the diagram, 100-steering wheel assembly, 101-steering wheel center seat, 102-steering wheel outer ring seat, 103-slot, 104-sliding hole, 105-sliding column, 106-return spring, 107-contact seat, 108-micro switch;

[0025] 200-Upper housing assembly, 201-Upper housing body, 202-Insertion block, 203-Card block, 204-Connecting threaded hole, 205-Flexible pressure transmission band, 206-Elastic buffer layer, 207-Capacitive sensing sheet, 208-Groove;

[0026] 300 - Lower housing assembly, 301 - Lower housing body, 302 - Card slot. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-5 As the first embodiment of this utility model:

[0029] A steering wheel off-hand detection device includes: a steering wheel assembly 100, the steering wheel assembly 100 including a steering wheel outer ring seat 102, a sliding hole 104, a sliding column 105, a contact seat 107 and a micro switch 108;

[0030] The outer side of the steering wheel outer ring seat 102 has four sets of sliding holes 104 evenly distributed in a circle at both the upper and lower ends. A sliding column 105 is provided through the center of the inner side of the sliding hole 104. A contact seat 107 is fixedly connected to one end of the sliding column 105 near the center of the steering wheel outer ring seat 102. A micro switch 108 is fixedly installed at the center of the steering wheel outer ring seat 102.

[0031] An upper outer shell assembly 200 is installed on the upper outer side of the outer ring seat 102 of the steering wheel, and a lower outer shell assembly 300 is installed on the lower outer side of the outer ring seat 102 of the steering wheel. Both the upper outer shell assembly 200 and the lower outer shell assembly 300 include a flexible pressure transmission band 205 and an elastic buffer layer 206.

[0032] The flexible pressure transmission strip 205 of the upper outer shell assembly 200 is fixedly connected to the upper outer shell body 201 at one end away from the center of the steering wheel outer ring seat 102, and the flexible pressure transmission strip 205 of the lower outer shell assembly 300 is fixedly connected to the lower outer shell body 301 at one end away from the center of the steering wheel outer ring seat 102.

[0033] The elastic buffer layer 206 is fixedly connected to one end near the center of the outer ring seat 102 of the steering wheel. A capacitive sensing sheet 207 is fixedly connected to the end of the elastic buffer layer 206 near the center of the outer ring seat 102 of the steering wheel. When the hand approaches, the capacitance value of the capacitive sensing sheet 207 changes, and the capacitive sensing sheet 207 is used for auxiliary detection.

[0034] The capacitive sensing element 207 is a flexible thin-film circuit. The flexible pressure transmission strip 205 is made of ultra-high molecular weight polyethylene material, and the elastic buffer layer 206 is made of silicone material. Pressure can be uniformly transmitted through the elastic buffer layer 206 and the flexible pressure transmission strip 205.

[0035] A return spring 106 is provided on the inner side of the sliding hole 104, located on the outer side of the sliding column 105. A micro switch 108 is used to control the change of the switch signal. A steering wheel center seat 101 is fixedly connected to the center position of the steering wheel outer ring seat 102.

[0036] The four sets of microswitches 108 are equally distributed on the left front side, right front side, left rear side and right rear side, and the outer surfaces of the upper outer shell 201 and the lower outer shell 301 are provided with grooves 208.

[0037] Specifically, during driving, the driver grips the steering wheel. The upper housing assembly 200 and the lower housing assembly 300 cover the outer side of the steering wheel outer ring seat 102. Pressure is evenly transmitted through the elastic buffer layer 206 and the flexible pressure transmission band 205, which in turn drives the sliding column 105 to overcome the rebound force of the return spring 106, causing the contact seat 107 to move closer to the micro switch 108. After the contact seat 107 contacts the micro switch 108, the micro switch 108 is in a "closed" state, generating a "contact" signal. (The specific model of the micro switch is a mature existing product, which only needs to meet the requirements of this utility model. Its related connection circuits and control methods all use existing technology and will not be described in detail here.) Secondly, the proximity of the hand causes a change in the capacitance value of the capacitive sensing element 207, which is used for auxiliary detection. At this time, a "contact" signal is also generated. Only when both sets of signals work together and exist simultaneously can the system determine that the hand grip is valid, thereby improving driving safety.

[0038] Please see Figures 1-2 and Figures 4-5 As a second embodiment of this utility model:

[0039] A set of inserts 202 are fixedly connected to the left and right ends of the inner side of the upper outer shell body 201 and the lower outer shell body 301. A set of slots 103 are opened on the left and right ends of the outer side of the steering wheel outer ring seat 102. The inserts 202 and the slots 103 are interlocked.

[0040] Four sets of circumferentially distributed locking blocks 203 are fixedly connected to the lower surface of the upper outer shell body 201. Four sets of locking slots 302 are correspondingly opened on the upper surface of the lower outer shell body 301. The locking blocks 203 and the locking slots 302 are engaged with each other. The lower surface of the upper outer shell body 201 and the upper surface of the lower outer shell body 301 are also provided with connecting threaded holes 204. The upper outer shell assembly 200 and the lower outer shell assembly 300 are pre-engaged with the steering wheel assembly 100. Then, the engaging structure of the upper outer shell assembly 200 and the lower outer shell assembly 300 is spliced ​​and fixed by screws and connecting threaded holes 204.

[0041] Based on the first embodiment described above, the upper outer shell assembly 200 and the lower outer shell assembly 300 are pre-engaged with the steering wheel assembly 100 through the engagement of the insert 202 and the slot 103. Then, the upper outer shell assembly 200 and the lower outer shell assembly 300 are spliced ​​through the engagement structure of the insert 203 and the slot 302, and are fixed by the engagement of screws and connecting threaded holes 204, thereby facilitating disassembly and assembly.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steering wheel hands-off detection device, comprising: A steering wheel assembly (100) is characterized in that: the steering wheel assembly (100) includes a steering wheel outer ring seat (102), a sliding hole (104), a sliding column (105), a contact seat (107), and a micro switch (108); The outer side of the steering wheel outer ring seat (102) is provided with four sets of sliding holes (104) evenly distributed in a circle at both the upper and lower ends. A sliding column (105) is provided through the center of the inner side of the sliding hole (104). A contact seat (107) is fixedly connected to one end of the sliding column (105) near the center of the steering wheel outer ring seat (102). A micro switch (108) is fixedly installed at the center of the steering wheel outer ring seat (102). An upper outer shell assembly (200) is installed on the upper outer side of the outer ring seat (102), and a lower outer shell assembly (300) is installed on the lower outer side of the outer ring seat (102). Both the upper outer shell assembly (200) and the lower outer shell assembly (300) include a flexible pressure transmission band (205) and an elastic buffer layer (206).

2. The steering wheel hands-off detection device as described in claim 1, characterized in that: The flexible pressure transmission strip (205) of the upper outer shell assembly (200) is fixedly connected to the upper outer shell body (201) at one end away from the center of the steering wheel outer ring seat (102), and the flexible pressure transmission strip (205) of the lower outer shell assembly (300) is fixedly connected to the lower outer shell body (301) at one end away from the center of the steering wheel outer ring seat (102).

3. The steering wheel hands-off detection device as described in claim 2, characterized in that: The elastic buffer layer (206) is fixedly connected at one end near the center of the outer ring seat (102) of the steering wheel, and a capacitive sensing sheet (207) is fixedly connected at the other end of the elastic buffer layer (206) near the center of the outer ring seat (102) of the steering wheel.

4. The steering wheel hands-off detection device as described in claim 3, characterized in that: The capacitive sensing sheet (207) is a flexible thin-film circuit, the flexible pressure conduction strip (205) is made of ultra-high molecular weight polyethylene, and the elastic buffer layer (206) is made of silicone.

5. The steering wheel hands-off detection device as described in claim 1, characterized in that: The inner side of the sliding hole (104) is located outside the sliding column (105) and a return spring (106) is provided. The micro switch (108) is used to realize the control of the switch signal change. The steering wheel center seat (101) is fixedly connected to the center position of the steering wheel outer ring seat (102).

6. The steering wheel hands-off detection device as described in claim 2, characterized in that: The four sets of microswitches (108) are equally distributed on the left front side, right front side, left rear side and right rear side, and the outer surfaces of the upper outer shell body (201) and the lower outer shell body (301) are provided with grooves (208).

7. The steering wheel hands-off detection device as described in claim 2, characterized in that: A set of inserts (202) is fixedly connected to the left and right ends of the inner side of the upper outer shell body (201) and the lower outer shell body (301). A set of slots (103) is opened on the left and right ends of the outer side of the steering wheel outer ring seat (102). The inserts (202) and slots (103) are fitted together.

8. The steering wheel hands-off detection device as described in claim 7, characterized in that: The lower surface of the upper outer shell body (201) is fixedly connected with four sets of circumferentially distributed locking blocks (203), and the upper surface of the lower outer shell body (301) is provided with four sets of locking slots (302). The locking blocks (203) and the locking slots (302) are engaged with each other. The lower surface of the upper outer shell body (201) and the upper surface of the lower outer shell body (301) are also provided with connecting threaded holes (204).

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