Composite smoke alarm

Abstract

The utility model relates to the technical field of smoke alarms, in particular to a composite smoke alarm, which comprises a device shell, a smoke inlet and a loudspeaker opening are arranged on the device shell, a ceiling is arranged at the upper end of the device shell, a guide opening is arranged on the ceiling, a transverse keel and a longitudinal keel are arranged on the ceiling, and a hoisting screw is arranged on the transverse keel. A clamping groove is formed in the longitudinal keel, an anti-loosening inner pad is arranged in the clamping groove, a bearing seat is arranged on the device shell, a bearing is arranged in the bearing seat, a double-thread screw is arranged in the bearing, a rotating handle and a clamping strip are arranged on the double-thread screw, an anti-loosening pressing ring is arranged on the rotating handle, a screw hole is formed in the clamping strip, a positioning block is arranged on the device shell, and a positioning groove is formed in the ceiling. The anti-loosening and anti-falling performance of the shell of the combined type smoke alarm installed on the ceiling is improved, and the installation convenience of the combined type smoke alarm is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of smoke alarm technology, and in particular to a composite smoke alarm. Background Technology

[0002] The most common type of composite smoke alarm is the photoelectric and thermal composite smoke alarm. It has a smoke inlet and a speaker opening on the outer casing, and a photoelectric sensor, a thermistor, an LED light source, a controller, and an alarm are pre-installed inside the casing.

[0003] Its specific working principle is as follows: when smoke passes through the smoke inlet on the outer casing, the particles in the smoke will scatter the light emitted by the LED light source. At this time, the photoelectric sensor senses the scattered light and transmits the signal to the controller. The controller controls the alarm to be activated, which is the photoelectric smoke alarm effect. At the same time, when the ambient temperature rises, the resistance of the thermistor will change. When the resistance exceeds the preset value on the PLC in the controller, the controller will control the alarm to be activated, which is the thermal alarm effect.

[0004] Currently, existing composite smoke detectors typically involve drilling a mounting groove in the ceiling (the ceiling is mounted on a pre-installed keel frame on the wall, according to existing technology). Then, impact screws are pre-installed in the mounting groove, and the detector housing is installed on the ceiling using multiple expansion screws and matching self-tapping screws. This installation method is quite time-consuming, and over time, the self-tapping screws are prone to loosening and falling off, causing the entire detector housing to loosen and detach from the ceiling. This significantly reduces the anti-loosening and anti-falling properties of the composite smoke detector housing when mounted on the ceiling. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a composite smoke alarm.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] Design a composite smoke detector, including a housing, on which a smoke inlet and a speaker outlet are provided. The upper end of the housing is provided with a ceiling, on which a guide opening is provided. The ceiling is provided with horizontal and vertical joists. The horizontal joists are provided with hanging screws, and the vertical joists are provided with snap-fit ​​grooves. The snap-fit ​​grooves are provided with anti-loosening gaskets. The housing is provided with a bearing seat, and the bearing seat is provided with a bearing. The bearing is provided with a double-threaded screw.

[0008] The twin-wire screw is provided with a handle and a locking strip. The handle is provided with an anti-loosening pressure ring, and the locking strip is provided with a screw hole.

[0009] The outer casing of the device is provided with a positioning block, and the ceiling is provided with a positioning groove.

[0010] Furthermore, the bearing is embedded in the bearing housing, and the mounting hole of the bearing is fixedly connected to the double-threaded screw.

[0011] Furthermore, the snap-fit ​​strip has an overall L-shaped structure and slides into the guide opening, with the upper bent portion of the snap-fit ​​strip laterally aligned with the snap-fit ​​groove.

[0012] Furthermore, the snap-fit ​​strip and snap-fit ​​groove are a set, and there are two sets arranged symmetrically. The anti-loosening inner pad is evenly laid along the inner wall of the snap-fit ​​groove.

[0013] Furthermore, the top view of the guide is a rectangular strip opening that vertically penetrates the ceiling, and the snap-fit ​​strip is threaded to a twin-threaded screw through a screw hole.

[0014] Furthermore, the positioning block and the positioning groove are a set, and there are two sets arranged symmetrically in the longitudinal direction. The anti-loosening pressure ring is a ring-shaped structure and is set on the inner wall surface of the rotating handle. The thickness of the anti-loosening pressure ring is six to seven centimeters.

[0015] Furthermore, the rotating handle is provided with a retaining groove, and there are two rotating handles symmetrically arranged at both ends of the double-threaded screw. The retaining groove is an arc-shaped inner groove and there are twelve of them arranged in a circle.

[0016] The composite smoke detector proposed in this utility model has the following advantages:

[0017] 1. This utility model features a symmetrical rotating handle with an anti-loosening pressure ring and a locking strip on a double-threaded screw, and a locking groove with an anti-loosening inner pad on the longitudinal keel. A matching guide structure is then installed on the ceiling. When the device housing is installed on the ceiling, the locking strips on both sides can quickly and stably slide and be damped and squeezed into the locking groove. At the same time, the outer wall of the locking strip will also make lateral damping and squeezing contact with the anti-loosening pressure ring, thereby achieving a symmetrical double squeezing and rebound anti-loosening effect. This improves the overall anti-loosening and anti-falling performance of the composite smoke alarm housing when installed on the ceiling.

[0018] 2. This utility model, through its double-threaded screw drive and snap-fit ​​structure, enables the snap-fit ​​strips on both sides to be synchronously and quickly snapped into the snap-fit ​​groove simply by manually rotating the double-threaded screw. This facilitates easy installation and avoids the tedious process of repeatedly rotating the pre-set screws with a screwdriver or other tools, greatly improving the ease of installation of the composite smoke alarm. Attached Figure Description

[0019] Figure 1This is a first-view perspective perspective view of the overall structure of this utility model;

[0020] Figure 2 For the present utility model Figure 1 Enlarged view of a section at point G in the middle;

[0021] Figure 3 This is a second-view perspective perspective view of the overall structure of this utility model;

[0022] Figure 4 This is a top view of the overall structure of this utility model;

[0023] Figure 5 For the present utility model Figure 4 Cross-sectional view of HH.

[0024] In the diagram: 1. Housing; 11. Smoke inlet; 12. Loudspeaker outlet; 13. Positioning block; 2. Bearing seat; 21. Bearing; 3. Double threaded screw; 31. Rotary handle; 311. Snap-fit ​​groove; 32. Anti-loosening pressure ring; 4. Ceiling; 41. Guide opening; 42. Positioning groove; 5. Snap-fit ​​strip; 51. Screw hole; 6. Horizontal keel; 61. Vertical keel; 62. Snap-fit ​​groove; 63. Anti-loosening inner gasket; 7. Lifting screw. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1-5 A composite smoke detector includes a housing 1, on which a smoke inlet 11 and a speaker outlet 12 are provided. A ceiling 4 is provided at the upper end of the housing 1, and a guide opening 41 is provided on the ceiling 4. A horizontal keel 6 and a vertical keel 61 are provided on the ceiling 4. A hanging screw 7 is provided on the horizontal keel 6, and a snap-fit ​​groove 62 is provided on the vertical keel 61. An anti-loosening pad 63 is provided in the snap-fit ​​groove 62. A bearing seat 2 is provided on the housing 1, and a bearing 21 is provided in the bearing seat 2. A double-threaded screw 3 is provided in the bearing 21.

[0027] The double-threaded screw 3 is provided with a handle 31 and a locking strip 5. The handle 31 is provided with an anti-loosening pressure ring 32, and the locking strip 5 is provided with a screw hole 51.

[0028] The outer casing 1 is provided with a positioning block 13, and the ceiling 4 is provided with a positioning groove 42. The outer casing 1 is a composite smoke alarm, which is existing technology. Some existing structures are not drawn or labeled, so there is no need to elaborate. The working principle has been recorded in the background art.

[0029] The bearing 21 is embedded in the bearing housing 2. The mounting hole of the bearing 21 is fixedly connected to the double-threaded screw 3. The bearing 21 is a ball bearing to prevent the double-threaded screw 3 from sliding laterally.

[0030] The snap-fit ​​strip 5 has an L-shaped structure and slides and snaps into the guide 31. The upper bent part of the snap-fit ​​strip 5 is horizontally aligned with the snap-fit ​​groove 62, which ensures that the snap-fit ​​strip 5 is horizontally and accurately snapped into the snap-fit ​​groove 62 laterally.

[0031] The snap-fit ​​strip 5 and the snap-fit ​​groove 62 are a set, and there are two sets in total, which are symmetrically arranged. The anti-loosening pad 63 is evenly laid along the inner wall of the snap-fit ​​groove 62. The anti-loosening pad 63 is made of silicone pad material and has damping and high elasticity. When the snap-fit ​​strip 5 is snapped into the snap-fit ​​groove 62, it will be squeezed with the anti-loosening pad 63 and generate a lateral rebound force. This lateral rebound force acts on the twin-thread screw 3 to prevent it from loosening by self-rotation.

[0032] The top view of the guide opening 41 is a rectangular strip opening that runs vertically through the ceiling 4. After the installation is completed, the guide opening 41 can be filled with sealant to ensure the overall aesthetics of the guide opening 41.

[0033] The snap-fit ​​strip 5 is threadedly connected to the double-threaded screw 3 through the screw hole 51. The double-threaded screw 3 is a forward and reverse threaded rod and is threadedly connected to the screw hole 51 on both sides of the snap-fit ​​strip 5. When the double-threaded screw 3 rotates forward and reverse, the snap-fit ​​strips 5 on both sides can move closer or further away at the same time, which is very convenient.

[0034] The positioning block 13 and the positioning groove 42 are a set, and there are two sets arranged symmetrically in the longitudinal direction to ensure that the snap-fit ​​strip 5 passes through the guide 41 upward during the installation process.

[0035] The anti-loosening pressure ring 32 is a ring-shaped structure and is set on the inner wall of the rotating handle 31. The thickness of the anti-loosening pressure ring 32 is six to seven centimeters. The anti-loosening pressure ring 32 is made of vulcanized rubber, which has damping and high elasticity. When it is squeezed with the snap-fit ​​strip 5, it will generate a lateral rebound force. This lateral rebound force acts on the twin-thread screw 3 to prevent it from loosening due to self-rotation.

[0036] The rotating handle 31 has a latching groove 311. There are two rotating handles 31, which are symmetrically arranged at both ends of the double-threaded screw 3. The latching groove 311 is an arc-shaped inner groove, and there are twelve of them arranged in a circle. The rotating handle 31 can be directly inserted into the groove and rotated directly.

[0037] Working method: During installation, the horizontal keel 6 and the vertical keel 61 are fixed to the pre-set wall at the top by the hoisting screw 7 (existing technology). Then, the positioning block 13 on the outer shell 1 is aligned with the positioning groove 42 on the ceiling 4. Then, the top end face of the outer shell 1 is tightly attached to the bottom end face of the ceiling 4. At this time, the positioning block 13 has been engaged with the positioning groove 42. Next, the finger is inserted into the buckle groove 311 and rotated clockwise, which drives the rotating handle 31 and the double-thread screw 3 to rotate clockwise. Through the thread transmission of the screw hole 51, the locking strips 5 on both sides can be driven to slide away along the guide openings 41 on both sides. After the upper bent part of the locking strip 5 is damped and squeezed into the locking groove 62, the rotating handle 31 is stopped. At this time, the outer wall of the locking strip 5 will also make lateral damped squeezing contact with the anti-loosening pressure ring 32, thereby realizing the symmetrical double squeezing rebound anti-loosening effect, which improves the overall anti-loosening and anti-falling performance of the outer shell 1 of the composite smoke alarm installed on the ceiling 4.

[0038] In addition, the double-threaded screw 3 transmission and locking structure allows for easy installation by simply manually rotating the double-threaded screw 3, which drives the locking strips 5 on both sides to move synchronously and quickly into the locking slot 62. This avoids the hassle of repeatedly turning the pre-set screws with a screwdriver or other tools to continue the installation, greatly improving the ease of installation of the composite smoke alarm.

[0039] 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 composite smoke detector, comprising a housing (1), characterized in that: The outer casing (1) of the device is provided with a smoke inlet (11) and a speaker outlet (12). The upper end of the outer casing (1) is provided with a ceiling (4). The ceiling (4) is provided with a guide opening (41). The ceiling (4) is provided with a horizontal keel (6) and a vertical keel (61). The horizontal keel (6) is provided with a lifting screw (7). The vertical keel (61) is provided with a snap-fit ​​groove (62). The snap-fit ​​groove (62) is provided with an anti-loosening pad (63). The outer casing (1) of the device is provided with a bearing seat (2). The bearing seat (2) is provided with a bearing (21). The bearing (21) is provided with a double-threaded screw (3). The double-threaded screw (3) is provided with a handle (31) and a locking strip (5). The handle (31) is provided with an anti-loosening pressure ring (32), and the locking strip (5) is provided with a screw hole (51). The outer shell (1) of the device is provided with a positioning block (13), and the ceiling (4) is provided with a positioning groove (42).

2. The composite smoke detector according to claim 1, characterized in that: The bearing (21) is embedded in the bearing housing (2), and the mounting hole of the bearing (21) is fixedly connected to the double-threaded screw (3).

3. A composite smoke detector according to claim 1, characterized in that: The snap-fit ​​strip (5) has an L-shaped structure and slides and snaps into the guide (41). The upper bent part of the snap-fit ​​strip (5) is horizontally aligned with the snap-fit ​​groove (62).

4. A composite smoke detector according to claim 1, characterized in that: The snap-fit ​​strip (5) and snap-fit ​​groove (62) are a set, and there are two sets symmetrically arranged. The anti-loosening pad (63) is evenly laid along the inner wall of the snap-fit ​​groove (62).

5. A composite smoke detector according to claim 1, characterized in that: The top view of the guide (41) is a rectangular strip opening that vertically penetrates the ceiling (4). The snap-fit ​​strip (5) is threadedly connected to the double-threaded screw (3) through the screw hole (51).

6. A composite smoke detector according to claim 1, characterized in that: The positioning block (13) and the positioning groove (42) are a set, and there are two sets arranged symmetrically in the longitudinal direction. The anti-loosening pressure ring (32) is a ring-shaped structure and is set on the inner wall surface of the rotating handle (31). The thickness of the anti-loosening pressure ring (32) is six to seven centimeters.

7. A composite smoke detector according to claim 1, characterized in that: The rotating handle (31) is provided with a retaining groove (311). There are two rotating handles (31) and they are symmetrically arranged at both ends of the double-thread screw (3). The retaining groove (311) is an arc-shaped inner groove and there are twelve of them arranged in a circle.

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