Fire detector
By using injection molding of the shell to limit and fix the conductive post, the problem of complex connection between the conductive post and the shell is solved, resulting in cost reduction and improved stability.
Patent Information
- Application Number
- CN202422742528.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-11
AI Technical Summary
The existing fire detectors have complex and unstable connection methods between the conductive posts and the housing, resulting in high costs and short service life.
The conductive pillars are fixed and positioned by means of shell injection molding. The structure is simplified and the stability is improved by the cooperation of the protrusion structure and the limiting groove.
This reduces production costs and improves the stability and lifespan of fire detectors.
Smart Images
Figure CN223501435U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of fire detectors, and more particularly to a fire detector. Background Technology
[0002] The working principle of a photoelectric smoke detector is that a photosensitive electrode generates an electrical signal when illuminated by a laser. When smoke obscures the laser, the electrode loses power and triggers an alarm signal. In point-type photoelectric smoke detectors, the infrared emitting element and the photosensitive element are typically offset within their detection chamber. The distance between them is generally 20-25mm. Under normal smoke-free monitoring conditions, the photosensitive element receives no light, including that emitted by the infrared emitting element. When smoke particles enter the detection chamber, the light emitted by the infrared emitting element is scattered or reflected by the smoke particles onto the photosensitive element. Upon receiving sufficient light, a fire alarm signal is triggered. This fire detection method is commonly referred to as the smoke scattering light method.
[0003] Photoelectric smoke detectors are generally suitable for places where there is no large amount of water vapor or smoke, such as restaurants, hotels, teaching buildings, computer rooms, communication rooms, office building halls, bedrooms, office libraries, archives, etc.
[0004] In terms of current technology, the connection between the conductive posts inside the fire detector and the outer shell is complex and not stable enough, resulting in high cost and short service life. Summary of the Invention
[0005] To address the aforementioned problems with existing fire detectors, this paper aims to provide a fire detector that directly limits and fixes the conductive post through the injection molding of the housing. This design is simple in structure, easy to manufacture, reduces costs, improves stability, and extends service life.
[0006] The specific technical solution is as follows:
[0007] A fire detector, comprising:
[0008] The housing and a plurality of conductive pillars, each of the conductive pillars having at least one limiting groove, the housing being injection molded and at least covering the limiting groove of the conductive pillar, so that a portion of the housing is in a limiting engagement with the limiting groove;
[0009] A circuit board assembly is disposed within the housing, and each of the conductive posts is connected to the circuit board assembly.
[0010] In the aforementioned fire detector, a portion of the housing is a protruding structure, which engages with the limiting groove for limiting.
[0011] In the aforementioned fire detector, the protruding structure is a protruding ring, the limiting groove is an annular groove, and the protruding ring and the annular groove are in a limiting fit.
[0012] In the aforementioned fire detector, a plurality of fixing rings are formed on the housing, and the inner wall of the fixing ring has the protruding structure. The conductive post passes through the fixing ring, and the fixing ring is fixed to the conductive post by the limiting cooperation between the protruding structure and the limiting groove.
[0013] In the aforementioned fire detector, the housing has a mounting plate, on which the fixing ring is formed, and the fixing ring extends along one side of the mounting plate.
[0014] In the aforementioned fire detector, the length of the fixing ring is greater than the thickness of the mounting plate.
[0015] In the aforementioned fire detector, the housing includes a lower cover and an upper cover connected to each other, and the conductive post is installed on the lower cover.
[0016] The aforementioned fire detector has a label on its lower cover.
[0017] In the aforementioned fire detector, the end of the conductive post is soldered to the circuit board assembly.
[0018] In the aforementioned fire detector, a light guide column is connected to the circuit board assembly.
[0019] The fire detector described above further includes a base assembly, which is disposed within the housing. The base assembly includes a base, a plurality of contact piece groups, and a plurality of screws, with each contact piece group being fixed to the base by one screw.
[0020] The positive effects of the above technical solution compared with the existing technology are:
[0021] This invention uses injection molding of the shell to directly limit and fix the conductive post, which is simple in structure, easy to process and produce, reduces costs, improves stability, and extends service life. Attached Figure Description
[0022] Figure 1 This is an exploded structural diagram of a fire detector according to the present invention;
[0023] Figure 2 This is a schematic diagram of the structure of the lower cover of a fire detector according to the present invention;
[0024] Figure 3 This utility model relates to a fire detector. Figure 2 A magnified view of a portion of the image;
[0025] Figure 4 This is an exploded structural diagram of the base assembly of a fire detector according to the present invention.
[0026] In the attached drawings: 1. Housing; 2. Conductive post; 3. Circuit board assembly; 4. Limiting groove; 5. Protruding structure; 6. Fixing ring; 7. Mounting plate; 8. Light guide post; 9. Base assembly; 11. Lower cover; 12. Upper cover; 13. Label; 14. Outer cover; 91. Base; 92. Screw; 93. First contact piece; 94. Second contact piece. Detailed Implementation
[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.
[0028] A preferred embodiment of a fire detector is shown, comprising: a smoke detector, a heat detector, or a combined smoke and heat detector.
[0029] like Figures 1 to 4 As shown, the fire detector includes: a housing 1, multiple conductive posts 2 and a circuit board assembly 3. Each conductive post 2 has at least one limiting groove 4. The housing 1 is injection molded and at least covers the limiting groove 4 of the conductive post 2 so that a part of the housing 1 is limited and matched with the limiting groove 4. The circuit board assembly 3 is disposed inside the housing 1, and each conductive post 2 is connected to the circuit board assembly 3.
[0030] Furthermore, in a preferred embodiment, part of the housing 1 is a protruding structure 5, which is matched with the limiting groove 4 for limiting.
[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.
[0032] Based on the above, this utility model also has the following embodiments:
[0033] For further embodiments of this utility model, please refer to... Figure 1 As shown, the protruding structure 5 is a protruding ring, and the limiting groove 4 is an annular groove. The protruding ring and the annular groove are matched for limiting.
[0034] In a further embodiment of this utility model, a plurality of fixing rings 6 are formed on the housing 1, and the inner wall of the fixing ring 6 has a protrusion structure 5. The conductive post 2 passes through the fixing ring 6, and the fixing ring 6 is fixed to the conductive post 2 by the limiting cooperation between the protrusion structure 5 and the limiting groove 4.
[0035] In a further embodiment of the present invention, the housing 1 has a mounting plate 7, and a fixing ring 6 is formed on the mounting plate 7, the fixing ring 6 extending along one side of the mounting plate 7.
[0036] Preferably, mounting plate 7 is a flat plate.
[0037] Preferably, a plurality of receiving spaces are formed on the mounting plate 7, one end of the fixing ring 6 extends into the receiving space, and the outer periphery of one end of the fixing ring 6 is connected to the mounting plate 7.
[0038] In a further embodiment of this utility model, the length of the fixing ring 6 is greater than the thickness of the mounting plate 6.
[0039] Preferably, the mounting plate 7, the fixing ring 6, and the protruding structure 5 are an integral structure, injection molded.
[0040] In a further embodiment of the present invention, the housing 1 includes a lower cover 11 and an upper cover 12 connected to each other, and the conductive post 2 is installed on the lower cover.
[0041] Preferably, the lower cover 11 and the upper cover 12 are snapped together.
[0042] Preferably, the lower cover 11 has a plurality of raised structures 5.
[0043] Preferably, a plurality of fixing rings 6 are formed on the lower cover 11, and each fixing ring 6 has a protrusion structure 5 on its inner wall.
[0044] Preferably, the lower cover 11 includes: a mounting plate 7, on which a plurality of fixing rings 6 are formed.
[0045] Preferably, the lower cover 11 further includes an outer cover 14, with the mounting plate 7 disposed inside the outer cover 14.
[0046] Preferably, the outer cover 14, mounting plate 7, fixing ring 6 and protruding structure 5 are an integral structure.
[0047] In a further embodiment of this utility model, the end of the conductive post 2 is welded to the circuit board assembly 3.
[0048] In a further embodiment of this utility model, a label 13 is provided on the lower cover 11.
[0049] In a further embodiment of this utility model, a light guide post 8 is connected to the circuit board assembly 3.
[0050] In a further embodiment of the present invention, the fire detector further includes a base assembly 9, which is disposed inside the housing 1. The base assembly 9 includes a base 91, a plurality of contact piece groups and a plurality of screws 92, and each contact piece group is fixed to the base 91 by a screw 92.
[0051] Preferably, the contact piece group includes: a first contact piece 93 and a second contact piece 94, the first contact piece 93 and the second contact piece 94 being fixedly connected to the base 91 by a screw 92.
[0052] The entire rear of the detector has no air intake gap, which can effectively prevent smoke from entering from the rear of the detector and meet the smoke entry (chimney effect) test of UL268 standard.
[0053] This invention uses the injection molding of the shell 1 to directly limit and fix the conductive post 2. The structure is simple, easy to process and produce, reduces costs, improves stability, and extends service life.
[0054] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A fire detector, characterized in that, include: The housing and a plurality of conductive pillars, each of the conductive pillars having at least one limiting groove, the housing being injection molded and at least covering the limiting groove of the conductive pillar, so that a portion of the housing is in a limiting engagement with the limiting groove; A circuit board assembly is disposed within the housing, and each of the conductive posts is connected to the circuit board assembly.
2. The fire detector according to claim 1, characterized in that, Part of the housing is a protruding structure, which engages with the limiting groove for positioning.
3. The fire detector according to claim 2, characterized in that, The protruding structure is a protruding ring, and the limiting groove is an annular groove. The protruding ring and the annular groove are in a limiting fit.
4. The fire detector according to claim 3, characterized in that, Multiple fixing rings are formed on the housing, and the inner wall of the fixing ring has the protrusion structure. The conductive post passes through the fixing ring, and the fixing ring is fixed to the conductive post by the limiting cooperation between the protrusion structure and the limiting groove.
5. The fire detector according to claim 4, characterized in that, The housing has a mounting plate, on which the fixing ring is formed, and the fixing ring extends along one side of the mounting plate; The length of the retaining ring is greater than the thickness of the mounting plate.
6. The fire detector according to claim 1, characterized in that, The housing includes a lower cover and an upper cover that are connected to each other, and the conductive post is installed on the lower cover.
7. The fire detector according to claim 6, characterized in that, A label is provided on the lower cover.
8. The fire detector according to claim 1, characterized in that, The end of the conductive post is soldered to the circuit board assembly.
9. The fire detector according to claim 1, characterized in that, The circuit board assembly is connected to a light guide column.
10. The fire detector according to claim 1, characterized in that, Also includes: A base assembly is disposed within the housing. The base assembly includes a base, a plurality of contact piece groups, and a plurality of screws, wherein each contact piece group is fixed to the base by a screw.