Linear light beam smoke-sensing fire detector with anti-falling structure

Abstract

The utility model discloses a linear light beam smoke fire detector with an anti-drop structure, which comprises a mask, a base, a screw and an anti-drop piece, the mask is arranged on the front side of the base, the threaded end of the screw penetrates through a through hole in the mask to be in threaded fit with a nut on the base, and the anti-drop piece is arranged on the base. The threaded end extends to the rear side of the nut and is connected with the anti-disengaging piece, and the anti-disengaging piece is used for preventing the screw from disengaging. According to the technical scheme, the thread end of the screw is subjected to later-stage stopping treatment through the anti-disengaging piece so as to achieve the effective limiting function, it is guaranteed that the screw cannot be completely loosened and disengaged in the using process through the design, the screw can be firmly limited, and the service life of the screw is prolonged. The face shield is prevented from loosening and falling off due to strenuous vibration or overlarge external force, so that the stability of the linear light beam smoke-sensing fire detector is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of smoke detectors, and in particular to a linear beam smoke detector with an anti-detachment structure. Background Technology

[0002] Linear beam smoke detectors use infrared light as a detection source. They can detect fires within a fixed range around the infrared beam by taking advantage of the diffusion properties of smoke. Linear beam smoke detectors are usually composed of separately installed and calibrated infrared emitters and receivers paired together.

[0003] Currently, commercially available linear beam smoke detectors mainly consist of a faceplate and a base. The faceplate and base are mostly fixed using a screw and nut threaded connection. While this threaded connection is simple and easy to operate, excessive structural vibration during transportation, installation, and commissioning can cause wear and damage to the screw and nut threads, potentially leading to the faceplate detaching from the detector. Utility Model Content

[0004] In order to overcome the existing technical defects and solve the problem that the mask of the linear beam smoke detector may fall off under severe vibration or excessive external force, the purpose of this utility model is to provide a linear beam smoke detector with an anti-detachment structure to solve the above-mentioned technical problems.

[0005] The technical solution adopted by this utility model to solve the technical problem is as follows:

[0006] According to one aspect of this utility model, a linear beam smoke detector with an anti-detachment structure is designed, comprising: a mask, a base, a screw, and an anti-detachment component. The mask is located on the front side of the base. The threaded end of the screw passes through a through hole on the mask and is threadedly engaged with a nut on the base. The threaded end extends to the rear side of the nut and is connected to the anti-detachment component. The anti-detachment component is used to prevent the screw from falling off.

[0007] In this technical solution, an anti-loosening component is used to stop the threaded end of the screw in the later stage, which aims to achieve an effective limiting function. This design ensures that the screw cannot be completely loosened and fall off during use, and can firmly restrain the screw, preventing the mask from loosening and falling off due to severe vibration or excessive external force, thereby improving the stability of the linear beam smoke detector.

[0008] To better address the aforementioned technical deficiencies, this utility model also offers a superior technical solution:

[0009] In some embodiments, an elastic element is provided between the face mask and the base, which elastically abuts against both. The use of the elastic element provides significant cushioning for the contact between the screw and nut, effectively reducing wear between them; when the screw is subjected to applied or released force, the elastic element deforms and releases a reaction force, making the contact between the screw and nut even tighter.

[0010] In some embodiments, the anti-detachment component is a snap ring, which engages with an annular groove on the threaded end. This snap-fit ​​connection allows for quick installation.

[0011] In some embodiments, the anti-detachment component is a cotter pin, one end of which passes through a through hole on the threaded end and is bent.

[0012] In some embodiments, the elastic element is a spring and is fitted onto the screw.

[0013] In some embodiments, one end of the spring is placed in an annular groove on the mask, and the other end is placed in an annular groove on the base.

[0014] In some embodiments, three screws are provided. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a linear beam smoke detector with an anti-detachment structure according to one embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the front view structure of a linear beam smoke detector with an anti-detachment structure;

[0017] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at position AA in the middle;

[0018] Figure 4 A schematic diagram of the explosion structure of a linear beam smoke detector with an anti-detachment structure;

[0019] Figure label:

[0020] 1. Face mask; 2. Base; 3. Screw; 4. Anti-slip component; 5. Nut; 6. Elastic component. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as setting, installing, connecting, and fixing should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] refer to Figures 1 to 4 As shown, this utility model provides a linear beam smoke detector with an anti-detachment structure, comprising: a face mask 1, a base 2, screws 3, and an anti-detachment component 4. The face mask 1 is located on the front side of the base 2. One, two, three, or four screws 3 are provided. In this embodiment, three screws 3 are preferred. Each screw 3 has a screw head at its front end and a threaded end at its rear end. The threaded ends of the three screws 3 pass through three through holes on the face mask 1 and are threadedly engaged with three nuts 5 on the base 2. The nuts 5 are placed in grooves on the rear side of the base 2 or are injection molded and fixed within the base 2. The threaded end of screw 3 extends to the rear side of nut 5 and connects with anti-loosening component 4. Anti-loosening component 4 is used to prevent screw 3 from falling off. Anti-loosening component 4 is either a retaining spring or a cotter pin. When anti-loosening component 4 is a retaining spring, the retaining spring engages with the annular groove on the threaded end of screw 3 to form an anti-loosening structure that prevents screw 3 from falling off. When anti-loosening component 4 is a cotter pin, one end of the cotter pin passes through the through hole on the threaded end of screw 3 and is bent to form an anti-loosening structure that prevents screw 3 from falling off. In this embodiment, anti-loosening component 4 is preferably a retaining spring, which is an E-type retaining spring, and the retaining spring engages with the annular groove on the threaded end of screw 3.

[0025] An elastic element 6 is provided between the mask 1 and the base 2 to elastically abut against both. The elastic element 6 is a spring or a spring sheet. In this embodiment, the elastic element 6 is preferably a spring. The number of springs is the same as the number of screws 3. The spring is sleeved on the screw 3. One end of the spring is placed in the annular groove on the mask 1 and elastically abuts against the mask 1. The other end is placed in the annular groove on the base 2 and elastically abuts against the base 2.

[0026] During assembly, the threaded end of screw 3 passes through the through hole on the faceplate 1 and engages with the nut 5 on the base 2. Continuing to tighten screw 3 extends its threaded end to the rear of nut 5 and engages with the anti-loosening component 4, thereby connecting the faceplate 1 of the alarm to the base 2. The retaining spring forms an effective limiting structure, thereby reducing the loosening of the screw due to vibration or external force during use. At the same time, the spring is installed between the screw and the nut, playing an important buffering role and increasing the stability of the overall structure.

[0027] The linear beam smoke detector is a conventional fire detector. It has an infrared emitter, an infrared receiver, and a control circuit board that is electrically connected to the infrared emitter and the infrared receiver. The infrared light emitted by the infrared emitter shines on a reflector, and after being reflected by the reflector, it is received by the infrared receiver. The smoke reduces the amount of light emitted by the infrared emitter to the infrared receiver to determine the fire.

[0028] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A linear beam smoke detector with an anti-detachment structure, characterized in that, include: The mask, base, screw, and anti-detachment component are provided. The mask is located on the front side of the base. The threaded end of the screw passes through the through hole on the mask and is threadedly engaged with the nut on the base. The threaded end extends to the rear side of the nut and connects with the anti-detachment component, which is used to prevent the screw from falling off.

2. A linear beam smoke detector with an anti-detachment structure according to claim 1, characterized in that, An elastic element is provided between the mask and the base to elastically abut against both.

3. A linear beam smoke detector with an anti-detachment structure according to claim 1 or 2, characterized in that, The anti-detachment component is a retaining ring, which engages with the annular groove on the threaded end.

4. A linear beam smoke detector with an anti-detachment structure according to claim 1, characterized in that, The anti-detachment component is a cotter pin, one end of which passes through the through hole on the threaded end and is bent.

5. A linear beam smoke detector with an anti-detachment structure according to claim 2, characterized in that, The elastic element is a spring, which is fitted onto the screw.

6. A linear beam smoke detector with an anti-detachment structure according to claim 5, characterized in that, One end of the spring is placed in an annular groove on the mask, and the other end is placed in an annular groove on the base.

7. A linear beam smoke detector with an anti-detachment structure according to claim 1, characterized in that, There are three screws.

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