Waterproof contact sensor

Abstract

The utility model relates to the technical field of sensor equipment, in particular to a waterproof contact sensor which comprises a proximity switch and further comprises a mounting base, the mounting base is provided with a rotatable arc sensing piece used in cooperation with the proximity switch, and the mounting base is slidably connected with a contact type pressing wheel used for making contact with an object. A transmission rod is arranged at one end of the contact type pressing wheel, a transmission mechanism is arranged between the transmission rod and the arc induction piece, and when the contact type pressing wheel is extruded by an object to drive the transmission rod to move, the arc induction piece rotates in the set direction and is used for collecting signals of the proximity switch. The service life of the sensor in a severe environment can be prolonged.

Description

Technical Field

[0001] This application relates to the field of sensor equipment technology, and in particular to a waterproof contact sensor. Background Technology

[0002] In industrial automated production, the reliability and adaptability of sensors directly affect production line efficiency and safety. However, existing sensors have significant shortcomings in terms of contamination protection, material detection range, and functional integration.

[0003] 1. Contamination Sensitivity of Photoelectric Switches: Photoelectric switches rely on optical signal transmission. In dusty environments such as mines, cement plants, and rice and flour product factories, dust particles can adhere to the surface of the transmitting / receiving lenses, causing sensor failure. This invention converts mechanical displacement signals into electromagnetic signals, significantly improving reliability in harsh environments.

[0004] 2. Waterproofing defects of limit switches: Traditional limit switches have exposed mechanical contacts, and their IP protection rating is generally lower than IP65. In seafood processing workshops or workshops that require water washing, water corrosion can easily cause contact oxidation, leading to detection failure and equipment malfunction.

[0005] 3. Material limitations of traditional proximity switches: Electromagnetic proximity switches can only detect metal objects and cannot effectively detect non-metallic objects such as plastic, wood, and glass, which limits their application in some complex scenarios and makes them unsuitable for contact detection scenarios. Utility Model Content

[0006] To improve the lifespan of sensors in harsh environments, this application provides a waterproof contact sensor.

[0007] This application provides a waterproof contact sensor, which adopts the following technical solution: it includes a proximity switch and a mounting base. The mounting base is provided with a rotatable arc-shaped sensing sheet that cooperates with the proximity switch. A contact pressure roller for contacting objects is slidably connected to the mounting base. A transmission rod is provided at one end of the contact pressure roller. A transmission mechanism is provided between the transmission rod and the arc-shaped sensing sheet. When the contact pressure roller is squeezed by an object and drives the transmission rod to move, the arc-shaped sensing sheet will rotate in a set direction and be used for signal acquisition by the proximity switch.

[0008] Optionally, a rotating shaft is rotatably connected to the mounting base, and a torsion spring is provided on the rotating shaft. The arc-shaped sensing plate is fixedly connected to the rotating shaft. When the object to be detected does not contact the contact pressure roller, the torsion spring will drive the arc-shaped sensing plate and the transmission rod to reset.

[0009] Optionally, the mounting base is provided with a track for moving the transmission rod.

[0010] Optionally, the mounting base is provided with a bracket for supporting the proximity switch.

[0011] In summary, this application includes the following beneficial technical effects:

[0012] 1. This invention adopts a working method that converts mechanical displacement signals into electromagnetic signals, abandoning the traditional photoelectric switch mode that relies on optical signal transmission. In harsh environments such as dusty environments, it avoids the interference of dust particles on the transmission of detection signals. Unlike the design of traditional limit switches with exposed mechanical contacts, the external structure of this sensor does not have exposed mechanical contacts that are susceptible to water corrosion. Its structural design can effectively prevent water intrusion. Even in humid environments such as seafood processing workshops or workshops that require water washing, it can ensure the normal operation of the detection function and avoid detection failure and equipment failure due to water corrosion.

[0013] 2. Traditional electromagnetic proximity switches can only detect metal objects. The external structure of the proximity switch senses objects through a contact pressure roller, which is not limited by the material of the object. Whether it is a metal, plastic, wood or glass or other materials, as long as it can exert a squeezing effect on the contact pressure roller, it can be effectively detected.

[0014] 3. The design of the torsion spring and rotating shaft ensures that the arc-shaped sensing plate and the transmission rod can automatically reset under the action of the transmission mechanism after the object to be detected leaves, thus ensuring that the sensor can perform continuous and stable detection work. Attached Figure Description

[0015] Figure 1 This is a perspective view of a waterproof contact sensor according to this application;

[0016] Figure 2 This is a top view of a waterproof contact sensor according to this application.

[0017] Reference numerals in the attached diagram: 1 proximity switch, 2 mounting base, 3 arc-shaped sensing plate, 4 contact pressure roller, 5 transmission rod, 6 rotating shaft, 7 track, 8 bracket. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0019] This application discloses a waterproof contact sensor. For example... Figure 1 and 2As shown, the device includes a proximity switch 1 and a mounting base 2. A bracket 8 for supporting the proximity switch 1 is screwed onto the mounting base 2. A rotatable arc-shaped sensing element 3, which works in conjunction with the proximity switch 1, is mounted on the mounting base 2. The proximity switch 1 collects signals through the arc-shaped sensing element 3. A contact pressure roller 4 for contacting objects is slidably connected to the mounting base 2. A transmission rod 5 is mounted at one end of the contact pressure roller 4, and the contact pressure roller 4 and the transmission rod 5 are rotatably connected. A track 7 for moving the transmission rod 5 is provided on the mounting base 2. A transmission mechanism is provided between the transmission rod 5 and the arc-shaped sensing element 3. When the contact pressure roller 4 is pressed by an object, causing the transmission rod 5 to move, the arc-shaped sensing element 3 will rotate in a set direction and be used for signal collection by the proximity switch 1. The transmission mechanism includes, but is not limited to, a rack and pinion mechanism. The rack is fixed to the transmission rod 5 with screws, and the gear is connected to the arc-shaped sensing element 3 through a rotating shaft 6. When the transmission rod 5 moves the rack, the gear rotates under the action of the rack, causing the arc-shaped sensing element 3 to rotate. A rotating shaft 6 is rotatably connected to the mounting base 2. A torsion spring is installed on the rotating shaft 6. The torsion spring is existing technology. The arc-shaped sensing plate 3 is fixedly connected to the rotating shaft 6. When the object to be detected does not contact the contact pressure roller 4, the torsion spring will drive the arc-shaped sensing plate 3 and the transmission rod 5 to reset.

[0020] The implementation principle of a waterproof contact sensor according to this application embodiment is as follows: When an object enters the detection range and comes into contact with the contact pressure roller 4, the object exerts a squeezing force on the contact pressure roller 4. After being squeezed, the contact pressure roller 4 moves along the sliding connection direction on the mounting base 2, simultaneously driving the transmission rod 5 to move synchronously. The movement of the transmission rod 5 is transmitted to the arc-shaped sensing plate 3 through the transmission mechanism, causing the arc-shaped sensing plate 3 to rotate around the rotating shaft 6 in a set direction. During the rotation of the arc-shaped sensing plate 3, the proximity switch 1 senses it, collects the signal change generated by the rotation of the arc-shaped sensing plate 3, and converts the signal into a corresponding electrical signal output, thereby realizing the detection of the object.

[0021] When the object leaves the detection range and no longer exerts pressure on the contact pressure roller 4, the elastic force of the torsion spring comes into play. The torsion spring drives the rotating shaft 6 to rotate in the opposite direction, thereby causing the arc-shaped sensing plate 3 and the transmission rod 5 to reset together with the rotation of the rotating shaft 6, returning to their initial positions. At this time, the entire external structure of the sensor is once again in a ready-to-detect state, waiting for the next object to enter the detection range, completing a complete detection cycle. Throughout the entire use, this external structure of the sensor can work continuously and stably, effectively adapting to harsh environments and providing reliable object detection functionality for industrial automation production.

[0022] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waterproof contact sensor comprising a proximity switch (1), characterized in that: It also includes a mounting base (2), on which a rotatable arc-shaped sensing plate (3) is provided for use with the proximity switch (1). A contact pressure roller (4) for contacting objects is slidably connected on the mounting base (2). A transmission rod (5) is provided at one end of the contact pressure roller (4). A transmission mechanism is provided between the transmission rod (5) and the arc-shaped sensing plate (3). When the contact pressure roller (4) is squeezed by an object and drives the transmission rod (5) to move, the arc-shaped sensing plate (3) will rotate in a set direction and be used for signal acquisition by the proximity switch (1).

2. A waterproof touch sensor according to claim 1, characterized in that: The mounting base (2) is rotatably connected to a rotating shaft (6), and a torsion spring is provided on the rotating shaft (6). The arc sensing plate (3) is fixedly connected to the rotating shaft (6). When the object to be detected does not contact the contact pressure roller (4), the torsion spring will drive the arc sensing plate (3) and the transmission rod (5) to reset.

3. A waterproof touch sensor according to claim 1, wherein: The mounting base (2) is provided with a track (7) for moving the transmission rod (5).

4. A waterproof touch sensor according to claim 1, wherein: The mounting base (2) is provided with a bracket (8) for supporting the proximity switch (1).

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