Contact induction anti-pinch pressure-sensitive sensor

Abstract

The utility model relates to a contact induction anti-pinch pressure-sensitive sensor which comprises an anti-pinch strip body and a large-angle anti-pinch section arranged at the top end of the anti-pinch strip body. The cross section of the anti-pinch strip body is in an arch shape, and the anti-pinch strip body comprises a framework structure directly installed on a metal plate edge covering structure of the sliding door, an installation blocking strip arranged on the framework structure and located in the arch shape, a steel core arranged in the framework structure and a threading hole formed in the bottom of the framework structure. A first conductive rubber strip and a second conductive rubber strip are arranged in the large-angle anti-pinch section, conductive wires are arranged in the first conductive rubber strip and the second conductive rubber strip respectively, and a hollow structure is arranged between the first conductive rubber strip and the second conductive rubber strip. And the first conductive rubber strip and the second conductive rubber strip are respectively connected with the anti-pinch strip body. The obstacle detection device is simple in structure, high in sensitivity and large in obstacle detection angle.

Description

Technical Field

[0001] This utility model relates to the field of sliding door components for automobiles, and in particular to a contact-sensitive anti-pinch pressure sensor. Background Technology

[0002] Conductive anti-pinch strips utilize the principle of rubber's easy deformation. By deforming the built-in conductor under pressure, they control the opening and closing of the electric door, thus stopping the electric door from closing. This effectively prevents people and objects from being pinched by the automatic door.

[0003] Conductive anti-pinch strips, also known as automotive conductive anti-pinch strips, are safety devices installed on automotive power doors, sunroofs, tailgates, and other similar locations. Their main function is to detect changes in pressure when an object is being clamped, controlling the motor to stop or reverse, thus preventing passengers or objects from being pinched. Conductive anti-pinch strips typically consist of a flexible rubber tube and an internal conductive strip. When the strip is compressed, the internal conductive strip contacts and triggers a sensor, stopping the power door. Currently, most systems only use two wires to detect motor current parameters, resulting in a relatively small obstacle detection angle.

[0004] Chinese patent CN203488032U relates to a rubber contact strip, which includes an elastic rubber tube, a conductive rubber strip fixedly disposed inside the elastic rubber tube, and an arc-shaped conductive rubber band fixedly disposed on the inner wall of the elastic rubber tube corresponding to the position of the conductive rubber strip. This invention has no sensing blind zone; when the rubber tube is squeezed in different directions, the conductive rubber strip can come into contact with the arc-shaped conductive rubber band to trigger signal transmission, thus enhancing the sensing direction of the rubber contact strip.

[0005] Chinese patent CN206497746U relates to a planar contact rubber strip, comprising an elastic rubber tube with a triangular cross-section. An upper conductive rubber strip is disposed at the upper part of the cross-section, and a lower conductive rubber strip is disposed at the lower part. A hollow structure exists between the upper and lower conductive rubber strips. The upper and lower conductive rubber strips have triangular cross-sections, and the hollow structure is linear. Conductive wires are respectively disposed on the upper and lower conductive rubber strips. This invention features a large contact area, high sensitivity, and strong conductivity.

[0006] Both of the above contact strips are types of conductive anti-pinch strips. Their top contact surface detection angle is relatively small, and they cannot detect obstacles when the obstacle detection angle is small, which affects the sensitivity and safety of the anti-pinch strip. Utility Model Content

[0007] To address the aforementioned problems, this utility model provides a contact-sensing anti-pinch pressure sensor that combines a wire and an anti-pinch strip, is easy to install, has a simple structure, high sensitivity, and a large obstacle detection angle.

[0008] The technical solution of this utility model:

[0009] A contact-sensitive anti-pinch pressure sensor includes an anti-pinch strip body and a large-angle anti-pinch section disposed at the top of the anti-pinch strip body.

[0010] The cross-section of the anti-pinch strip body is arched. The anti-pinch strip body includes a skeleton structure that is directly installed on the sheet metal edging structure of the sliding door, a steel core set in the skeleton structure, and a wire hole or wire groove set at the bottom of one side of the skeleton structure.

[0011] A first conductive rubber strip is provided inside the large-angle anti-pinch section, and a second conductive rubber strip is provided inside the first conductive rubber strip. Conductive wires are respectively provided inside the first and second conductive rubber strips. There is a hollow structure between the first and second conductive rubber strips. The first and second conductive rubber strips are respectively connected to the anti-pinch strip body.

[0012] Preferably, the skeleton structure is an insulating rubber skeleton.

[0013] Preferably, the material used for the large-angle anti-pinch section is insulating rubber.

[0014] Preferably, the large-angle anti-pinch section is fan-shaped.

[0015] Preferably, the angle of the large-angle anti-pinch section is 210°.

[0016] Preferably, the first conductive rubber strip is arc-shaped, and the arc shapes of the first and second conductive rubber strips are compatible.

[0017] Preferably, an anti-pinch hollow support is provided on one side of the outer side of the skeleton structure, and the anti-pinch hollow support is open or closed.

[0018] Preferably, an installation baffle is provided on one side of the inner side of the skeleton structure to increase the pull-out force.

[0019] Preferably, the conductive wire is a copper wire.

[0020] The beneficial effects of this utility model are:

[0021] This utility model combines a conductive wire and an anti-pinch strip. The cross-section of the anti-pinch strip body is arched. The anti-pinch strip body includes a skeleton structure that is directly installed on the sheet metal edging structure of the sliding door, a steel core set in the skeleton structure, and a wire hole or wire groove set at the bottom of the skeleton structure. It can store the conductive wire in the wire hole or wire groove, which is convenient and beautiful to use and easy to install. Installing it in the wire hole saves the labor of adding glue, while installing it in the wire groove requires the labor of adding glue.

[0022] The large-angle anti-pinch cross-section is fan-shaped with an angle of 210°, resulting in a large deformation angle, a wide obstacle detection angle, and high detection sensitivity. A first and second conductive rubber strip are installed within the large-angle anti-pinch cross-section, each containing conductive wires for signal transmission and conductivity. An anti-pinch hollow support is provided on one side of the external frame structure. The frame structure is secured to the sheet metal edging structure, ensuring a tighter seal and easier use.

[0023] This application proposes a contact-sensing anti-pinch pressure sensor that significantly reduces the anti-pinch cross-section through a robust structural design while achieving highly sensitive contact pressure detection. It enables real-time sensing and rapid response of clamping force within an extremely thin space, offering significant advantages over traditional anti-pinch solutions.

[0024] 1. Ultra-thin cross-section, highly adaptable to different spaces

[0025] Significantly reduces installation space requirements. Adaptable to narrow gaps or curved structures, such as automotive electric suction door seals and the edges of electric tabletops, where traditional sensors are difficult to deploy.

[0026] 2. Customized development, flexible adaptation to diverse scenarios. Supports customization of cross-sectional shape (such as arc, L-shape, irregular shape) and size to meet the mechanical and aesthetic needs of different devices.

[0027] For example, the car refrigerator door can be matched with an arc-shaped cross section, and the rear entertainment screen bracket adopts a flat design.

[0028] 3. High sensitivity and fast response

[0029] Applications include the automotive industry, electric suction doors, electric front / rear hoods, electric rear spoilers, concealed door handles, electric pedals, in-vehicle equipment, smart homes, industrial equipment, rear entertainment screen folding mechanisms, car refrigerator doors, electric tables, sunroof anti-pinch devices, electric cabinet doors, lifting tables, smart toilet seats, child safety devices, automated robotic arm grippers, conveyor belt safety edges, and medical bed lifting mechanisms.

[0030] Embedded into door seals or sheet metal gaps, it does not affect appearance or airtightness. It fits snugly against screen bezels or table edges, offering excellent concealment and saving space. Its ultra-thin design complements minimalist home decor, avoiding the bulkiness of mechanical anti-pinch structures. It is resistant to oil stains and extreme temperatures, and supports force feedback control for complex motion trajectories, filling a gap in ultra-thin anti-pinch technology: traditional anti-pinch solutions rely on non-contact detection such as infrared and capacitive sensors, which are easily affected by environmental factors; mechanical anti-pinch structures are bulky. This application achieves precise physical clamping detection within a very small space through contact pressure-sensitive sensing.

[0031] 4. Promote intelligent upgrading

[0032] Adaptable to emerging fields such as new energy vehicles (e.g., hidden door handle anti-pinch), smart cockpits (electric table safety protection), enhancing user experience and safety compliance. Cost reduction and efficiency improvement: Modular design reduces mass production costs, can replace imported high-end sensors, and seize market share in the automotive electronics and smart home supply chains. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0034] Figure 2 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0035] Figure 3 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0036] Figure 4 This is a schematic diagram of the installation structure of Embodiment 3 of this utility model.

[0037] In the attached diagram, 1-anti-pinch strip body, 2-large angle anti-pinch section, 1-1-frame structure, 1-2-installation stop strip, 1-3-steel core, 1-4-threading hole, 1-5-threading groove, 1-6-anti-pinch hollow support, 2-1-first conductive rubber strip, 2-2-second conductive rubber strip, 2-3-conductive wire, and 3-sheet metal edging structure. Detailed Implementation

[0038] Example 1

[0039] like Figure 1 As shown, a contact-sensing anti-pinch pressure sensor includes an anti-pinch strip body 1 and a large-angle anti-pinch section 2 disposed at the top of the anti-pinch strip body 1.

[0040] The anti-pinch strip body 1 has an arched cross-section. The anti-pinch strip body 1 includes a skeleton structure 1-1 that is directly installed on the sheet metal edging structure 3 of the sliding door, an installation stop 1-2 set inside one side of the skeleton structure 1-1, a steel core 1-3 set inside the skeleton structure 1-1, and a wire hole 1-4 set at the bottom of one side of the skeleton structure 1-1. The conductive wire 2-3 is installed in the wire hole 1-4 without the need for glue. The skeleton structure 1-1 is an insulating rubber skeleton.

[0041] A first conductive rubber strip 2-1 is disposed within the large-angle anti-pinch section 2, and a second conductive rubber strip 2-2 is disposed inside the first conductive rubber strip 2-1. Conductive wires 2-3, which are copper wires, are disposed within both the first and second conductive rubber strips 2-1 and 2-2, respectively. A hollow structure exists between the first and second conductive rubber strips 2-1 and 2-2. Both strips are connected to the anti-pinch strip body 1. The first conductive rubber strip 2-1 is arc-shaped, and the arc shapes of the first and second conductive rubber strips 2-2 are compatible. The large-angle anti-pinch section 2 is made of insulating rubber, is fan-shaped, and has an angle of 210°.

[0042] When the large-angle anti-pinch section 2 is squeezed in different directions, the angle is 210°, which increases the sensing area. In all cases, the first conductive rubber strip 2-1 and the second conductive rubber strip 2-2 can come into contact and conduct electricity, triggering signal transmission, causing a short circuit, stopping the rotating object from rotating, and protecting safety.

[0043] After the compression is released, the first conductive rubber strip 2-1 and the second conductive rubber strip 2-2 separate due to elasticity. There is a hollow structure 5 between the first conductive rubber strip 2-1 and the second conductive rubber strip 2-2, which is non-conductive and functions normally without compression.

[0044] The conductive wires 2-3 of this invention are made of copper wire, which has good conductivity and the material is readily available, thus helping to reduce costs.

[0045] Example 2

[0046] like Figure 2 As shown, compared with Embodiment 1, the bottom of one side of the skeleton structure 1-1 is provided with a wire groove 1-5, and the conductive wire 2-3 is installed in the wire groove 1-5 and needs to be fixed with glue. The outer side of the skeleton structure 1-1 is provided with an anti-pinch hollow support 1-6. The anti-pinch hollow support 1-6 is closed. The skeleton structure 1-1 is stuck on the sheet metal edge structure 3, which makes the seal tighter and the use more convenient.

[0047] Example 3

[0048] like Figure 3 and Figure 4 As shown, in this embodiment, compared to embodiment 1, a wire-passing groove 1-5 is provided on one bottom side of the skeleton structure 1-1. The conductive wire 2-3 is installed in the wire-passing groove 1-5 and needs to be fixed with glue. An anti-pinch hollow support 1-6 is provided on the outer side of the skeleton structure 1-1. The anti-pinch hollow support 1-6 is open. Openings are more easily deformed than closed ones. The skeleton structure 1-1 is stuck on the sheet metal edge structure 3, which provides a tighter seal and is more convenient to use.

[0049] The examples above are merely specific embodiments of this utility model, and obviously, this utility model is not limited to the above embodiments. All modifications that can be directly derived or conceived by those skilled in the art from the content disclosed in this utility model should fall within the protection scope of this utility model.

Claims

1. A contact-sensing pinch protection sensor, comprising: The anti-pinch strip body (1) and the large-angle anti-pinch section (2) arranged at the top end of the anti-pinch strip body (1) are included. The anti-pinch strip body (1) is arched in cross section and includes a framework structure (1-1), a steel core (1-3) arranged in the framework structure (1-1), and a threading hole (1-4) or a threading slot (1-5) arranged at the bottom of one side of the framework structure (1-1). The first conductive rubber strip (2-1) is arranged in the large-angle anti-pinch section (2), the first conductive rubber strip (2-1) is internally provided with a second conductive rubber strip (2-2), the first conductive rubber strip (2-1) and the second conductive rubber strip (2-2) are respectively provided with conductive wires (2-3), the first conductive rubber strip (2-1) and the second conductive rubber strip (2-2) are hollow structures, and the first conductive rubber strip (2-1) and the second conductive rubber strip (2-2) are respectively connected with the anti-pinch strip body (1).

2. The contact-sensing anti-pinch sensor of claim 1, wherein, The framework structure (1-1) is an insulating rubber framework.

3. The contact-sensing anti-pinch sensor of claim 1, wherein, The material of the large-angle anti-pinch section (2) is insulating rubber.

4. The contact-sensing anti-pinch sensor of claim 1, wherein, The large-angle anti-pinch section (2) is fan-shaped.

5. The contact-sensing anti-pinch sensor of claim 4, wherein, The angle of the large-angle anti-pinch section (2) is 210°.

6. The contact-sensing anti-pinch sensor of claim 1, wherein, The first conductive rubber strip (2-1) is arc-shaped, and the first conductive rubber strip (2-1) and the second conductive rubber strip (2-2) are arc-shaped and compatible.

7. The contact-sensing anti-pinch sensor of claim 1, wherein, The framework structure (1-1) is externally provided with an anti-pinch hollow support (1-6) on one side, and the anti-pinch hollow support (1-6) is open or closed.

8. The contact-sensing anti-pinch sensor of claim 1, wherein, The framework structure (1-1) is internally provided with a mounting blocking strip (1-2) on one side.

9. A touch and proximity anti-pinch sensor according to any one of claims 1-8, wherein, The conductive wires (2-3) are copper wires.

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