Protective glasses for a pyrometer

Abstract

The utility model discloses a kind of protective glasses for temperature measuring instrument, including the screw thread cooperation connection of tubular temperature measuring instrument mirror frame, lens is fixedly installed in mirror frame, U-shaped pedestal is fixedly installed in mirror frame two sides and is axially symmetrical, limit rod is movably hinged in U-shaped pedestal, slide rail is fixedly installed in tubular temperature measuring instrument two sides and is axially symmetrical, slide is slidably installed on slide rail, limit port is equipped in the middle of slide, the end of limit rod away from hinged point position is inserted in limit port, water tank is set in the bottom of mirror frame inner ring. The utility model mirror frame and temperature measuring instrument screw thread cooperation connection, when mirror frame is screwed to place, U-shaped pedestal will be flush with the slide rail of same side position, press limit rod to slide position, make the bending part of limit rod insert limit port, the rotation of mirror frame can be limited by limit rod, prevent temperature measuring instrument from rotating loose and falling in the case of jolt and vibration environment, it is convenient to install and disassemble, with good vibration resistance.

Description

Technical Field

[0001] This utility model relates to the field of temperature measuring instrument technology, specifically a protective goggles for temperature measuring instruments. Background Technology

[0002] Infrared thermometers, as a non-contact temperature measurement tool, are widely used in various fields such as industrial inspection, medical diagnosis, food safety, and daily life. The protective lens (usually made of infrared-transmitting materials such as germanium and silicon) in front of its core optical components is mainly used to protect the internal precision sensors and optical lenses from damage caused by dust, oil, moisture, and physical scratches.

[0003] In existing technologies, the methods for fixing the protective goggles of thermometers generally have the following forms and inherent defects: Threaded tightening: This is the most common method, where the protective lens is tightened by its outer thread engaging with the threaded hole in the thermometer lens. However, in actual use, especially in industrial environments, thermometers are frequently subjected to vibration, frequent assembly and disassembly, and thermal expansion and contraction caused by temperature changes. These factors can easily lead to loosening or even stripping of the threaded connection. Once loosened, the relative position between the protective lens and the optical axis of the thermometer will change slightly, introducing measurement errors and affecting temperature measurement accuracy. In severe cases, the protective lens may completely detach, causing expensive core optical components to be directly exposed to the harsh environment and damaged.

[0004] Adhesive-bonded type: Some designs use adhesives to permanently or semi-permanently bond the protective goggles to the mount. While this method provides good initial fixation, it has the drawback of being irreversible. When the surface of the protective goggles becomes contaminated or worn and requires cleaning or replacement, disassembly is extremely difficult and can easily damage the mount or the goggles themselves. Furthermore, the adhesive may age, fail, or produce volatile substances that contaminate the goggles surface under prolonged exposure to high temperatures or rapid temperature changes, similarly affecting the reliability of measurement results.

[0005] Elastic clip or clamp ring fixing: Some improved designs attempt to use plastic clips or metal clamp rings to secure the safety goggles from the side. While this method facilitates replacement, its reliability is highly dependent on manufacturing tolerances and the fatigue life of the elastic elements. After long-term use, the clips or clamp rings may undergo plastic deformation or elastic decay, resulting in a decrease in clamping force. This makes it ineffective in limiting the slight axial and radial movement of the safety goggles, and there is still a risk of loosening when subjected to external impacts or vibrations.

[0006] In summary, existing temperature measuring instrument protective lens fixing solutions all have varying degrees of shortcomings in terms of vibration resistance, maintainability (ease of replacement), and long-term reliability.

[0007] Therefore, there is an urgent need in this field for a protective goggle design for temperature measuring instruments. Utility Model Content

[0008] (a) Technical problems to be solved This invention provides a protective goggle for a temperature measuring instrument, aiming to solve the problems mentioned in the background art.

[0009] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A protective eye for a thermometer includes a frame that is threadedly connected to a tubular thermometer, a lens that is fixedly installed inside the frame, and U-shaped bases that are fixedly installed on both sides of the frame in an axially symmetrical manner, with limit rods movably hinged inside the U-shaped bases. The tubular thermometer is fixedly mounted with slide rails on both sides in an axially symmetrical manner. The slide rails are flush with the U-shaped base on the same side. A slide block is slidably mounted on the slide rail, and a limiting port is provided in the middle of the slide block. The end of the limiting rod away from the hinge point is inserted into the limiting opening; A water-permeable groove is provided at the bottom of the inner ring of the frame.

[0010] As a preferred technical solution of this application, the lens surface is coated with a hydrophobic material film.

[0011] As a preferred technical solution of this application, one end of the limiting rod is movably hinged to the U-shaped base via a torsion spring.

[0012] As a preferred technical solution of this application, the end of the limiting rod away from the hinge point is provided with an integrally formed bent portion.

[0013] As a preferred technical solution of this application, the slide rail surface is provided with a T-shaped slide groove along the length direction, and a T-shaped slider is fixedly provided at one end of the slide block, and the T-shaped slider is slidably installed in the T-shaped slide groove.

[0014] As a preferred technical solution of this application, a first spring is fixedly installed at one end of the T-shaped groove near the U-shaped base, and the first spring is in elastic contact with the corresponding T-shaped slider.

[0015] As a preferred technical solution of this application, a second spring is fixedly installed inside the opening of the U-shaped base. The second spring is located at one end of the opening of the U-shaped base away from the slide rail, and the second spring is in elastic contact with the corresponding limiting rod.

[0016] (III) Beneficial Effects The mirror frame of this utility model is threadedly connected to the thermometer. When the mirror frame is screwed in place, the U-shaped base will be flush with the slide rail on the same side. Press the limiting rod towards the slide rail so that the bent part of the limiting rod is engaged in the limiting port. The limiting rod can restrict the rotation of the mirror frame and prevent the thermometer from rotating, loosening and falling off in bumpy and vibrating environments. It is easy to install and disassemble and has good vibration resistance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a protective goggle used in a temperature measuring instrument; Figure 2 This is a schematic diagram of the structure of a U-shaped base in a protective goggle used in a temperature measuring instrument; Figure 3 Another structural view of the U-shaped base in a protective mirror used in a temperature measuring instrument; Figure 4 This is a cross-sectional view of a protective goggle used in a temperature measuring instrument.

[0018] In the picture: 1. Tubular thermometer; 2. Frame; 21. Lens; 22. Water-permeable groove; 3. U-shaped base; 31. Second spring; 4. Limiting rod; 41. Bending part; 5. Slide rail; 51. T-shaped slide groove; 52. First spring; 6. Slide seat; 61. Limiting port; 62. T-shaped slider. Detailed Implementation

[0019] 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.

[0020] See Figures 1-4 As shown, this utility model provides a protective mirror for a thermometer, including a mirror frame 2 that is threadedly connected to a tubular thermometer 1. The tubular thermometer 1 can be used for measuring the temperature of automobile engines or wheel hubs. The mirror frame 2 is circular in shape, and a lens 21 is fixedly installed inside the mirror frame 2. U-shaped bases 3 are fixedly installed on both sides of the mirror frame 2 in an axially symmetrical manner, and a limit rod 4 is movably hinged inside the U-shaped base 3. The tubular thermometer 1 is fixedly installed with slide rails 5 on both sides in an axially symmetrical manner. The slide rails 5 are flush with the U-shaped base 3 on the same side. A slide block 6 is slidably installed on the slide rails 5. A limiting port 61 is provided in the middle of the slide block 6. The end of the limiting rod 4 away from the hinge point is inserted into the limiting port 61; The bottom of the inner ring of the lens frame 2 is provided with a water-permeable groove 22 for water to overflow from the lens frame 2. If water marks are generated on the surface of the lens 2, the water will only form a small semi-circular water mark in the lower ring of the lens frame 2 due to the influence of gravity. The sensor window of the tubular thermometer 1 can work using only a small part of the diameter of the center point of the lens.

[0021] In this embodiment, the surface of the lens 21 is coated with a hydrophobic material film, which can effectively prevent water from adhering to the lens 21.

[0022] Furthermore, to ensure that the limiting rod 4 can be stably positioned within the limiting opening 61, in this embodiment, one end of the limiting rod 4 is movably hinged to the U-shaped base 3 via a torsion spring, and the elastic force of the torsion spring can lift the limiting rod 4.

[0023] Since the slide block 6 can slide, and the limit rod 4 inserted into the limit port 61 alone cannot restrict the movement of the slide block 6, in this embodiment, the end of the limit rod 4 away from the hinge point is provided with an integrally formed bent part 41, which is L-shaped and can engage with one end of the slide block 6.

[0024] In this embodiment, a T-shaped groove 51 is formed on the surface of the slide rail 5 along the length direction. The two ends of the T-shaped groove 51 do not penetrate the two ends of the slide rail 5. A T-shaped slider 62 is fixedly provided at one end of the slide block 6. The T-shaped slider 62 is slidably installed in the T-shaped groove 51, which can prevent the slide block 6 from detaching from the surface of the slide rail 5.

[0025] Furthermore, since the limiting rod 4 is inserted into the limiting port 61, the slide block 6 will slide. To avoid this phenomenon, in this embodiment, a first spring 52 is fixedly installed at one end of the T-shaped slide groove 51 near the U-shaped base 3. The first spring 52 is in elastic contact with the corresponding T-shaped slider 62. The elastic force of the first spring 52 enables the slide block 6 to engage with the bent part 41, preventing the slide block 6 from sliding.

[0026] Furthermore, to increase the stability of the contact between the limiting rod 4 and the slide block 6, in this embodiment, a second spring 31 is fixedly installed inside the opening of the U-shaped base 3. The second spring 31 is located at one end of the opening of the U-shaped base 3 away from the slide rail 5. The second spring 31 is in elastic contact with the corresponding limiting rod 4, and its elastic force can lift the limiting rod 4, so that the other end of the limiting rod 4 is stably attached to the inside of the limiting opening 61.

[0027] The specific operating steps are as follows: Install the frame 2 into the sensor window end of the tubular thermometer 1 through threaded connection. After the frame 2 is screwed in place, the U-shaped base 3 will be flush with the slide rail 5 on the same side. At this time, press the limiting rod 41 towards the slide 6, and then move the slide 6 so that the bent part 41 of the limiting rod 41 passes through the limiting port 61. After releasing the limiting rod 41, the limiting rod 41 can be stably inserted into the limiting port 61 by the elastic force of the torsion spring and the second spring 31. At the same time, the slide 6 can be engaged with the bent part 41 by the spring action of the first spring 52.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A protective goggle for a thermometer, comprising a frame threadedly connected to a tubular thermometer, wherein a lens is fixedly installed within the frame, characterized in that: The frame is fixedly mounted with U-shaped bases on both sides in an axially symmetrical manner, and a limit rod is movably hinged inside the U-shaped base; The tubular thermometer is fixedly mounted with slide rails on both sides in an axially symmetrical manner. The slide rails are flush with the U-shaped base on the same side. A slide block is slidably mounted on the slide rail, and a limiting port is provided in the middle of the slide block. The end of the limiting rod away from the hinge point is inserted into the limiting opening; A water-permeable groove is provided at the bottom of the inner ring of the frame.

2. The protective goggles for a thermometer according to claim 1, characterized in that: The lens surface is coated with a hydrophobic material film.

3. A protective goggle for a thermometer according to claim 1, characterized in that: One end of the limiting rod is movably hinged to the U-shaped base via a torsion spring.

4. A protective goggle for a thermometer according to claim 3, characterized in that: The end of the limiting rod away from the hinge point has an integrally formed bent section.

5. A protective goggle for a thermometer according to claim 1, characterized in that: The slide rail surface is provided with a T-shaped groove along its length, and a T-shaped slider is fixedly provided at one end of the slide block, with the T-shaped slider slidably installed in the T-shaped groove.

6. A protective goggle for a thermometer according to claim 5, characterized in that: A first spring is fixedly installed at one end of the T-shaped groove near the U-shaped base, and the first spring is in elastic contact with the corresponding T-shaped slider.

7. A protective goggle for a thermometer according to claim 1, characterized in that: A second spring is fixedly installed inside the opening of the U-shaped base. The second spring is located at one end of the opening of the U-shaped base away from the slide rail, and the second spring is in elastic contact with the corresponding limiting rod.

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