Point type smoke and temperature sensing fire detector

Abstract

The utility model belongs to the technical field of fire detectors, and particularly relates to a point type smoke and temperature sensing fire detector, which comprises a base, a contact spring electrically connected in the base, a middle buckle arranged at the lower part of the base, a circuit board arranged at the lower part of the middle buckle, and a temperature sensor connected to the lower side of the circuit board, a mounting disc is arranged at the lower part of the temperature sensor, the base is connected with a protective cover, the mounting disc is located in the protective cover, a mounting hole of the temperature sensor is formed in the middle of the mounting disc, the mounting disc, the circuit board and the middle buckle are mutually buckled and connected, a rotary clamping piece is arranged between the base and the middle buckle, and the cross section of the protective cover is in a conical arc shape. A plurality of through holes are annularly formed in the protective cover; the base is connected with the middle buckle, the middle buckle is connected with the circuit board and other components without screws, and disassembly is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of fire detector technology, specifically relating to a point-type smoke and temperature fire detector. Background Technology

[0002] Fire detectors are devices in automatic fire alarm systems that detect fires by detecting them on-site. They act as the system's "sensory organs," monitoring the environment for any fires. Once a fire is detected, the detector converts the characteristic physical quantities of the fire, such as temperature, smoke, gases, and radiant light intensity, into electrical signals and immediately sends an alarm signal to the fire alarm controller.

[0003] When a fire detector malfunctions and cannot be repaired, or when it has exceeded its service life, it needs to be disassembled. Existing fire detectors are usually connected by screws, which requires operators to use tools to disassemble them, and takes a lot of time. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a point-type smoke and temperature fire detector to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A point-type smoke and temperature fire detector includes a base with a contact spring electrically connected inside. A central latch is located at the lower part of the base, and the contact end of the contact spring is electrically connected to the central latch. A circuit board is located at the lower part of the central latch, and a temperature sensor is connected to the lower side of the circuit board. A mounting plate is located at the lower part of the temperature sensor. A protective cover is connected to the base, and the mounting plate is located inside the protective cover. A mounting hole for the temperature sensor is opened in the center of the mounting plate. The mounting plate, circuit board, and central latch are interlocked. A rotating snap-fit ​​is provided between the base and the central latch. The protective cover has a conical arc cross-section and multiple openings arranged in a ring around its perimeter.

[0007] Further specified, the upper side of the mounting plate is fixedly connected to a first elastic hook, the head of the first elastic hook being located above the slot opened in the circuit board, and the lower side of the middle buckle is fixedly connected to a second elastic hook, the head of the second elastic hook being located below the slot opened in the circuit board.

[0008] Furthermore, the protective cover is equipped with a light-transmitting indicator light on its surface, and the light-transmitting indicator light is connected to the circuit board signal.

[0009] Further specified, a circular portion is fixedly connected to the upper side of the mounting plate, the upper side of the circular portion is in contact with the circuit board, the temperature sensor is located inside the circular portion, and a positioning bone is fixedly connected to the circular portion, the upper end of the positioning bone is located above the circuit board.

[0010] Further specifying, the inner side of the protective cover is fixedly connected to an inner ring plate, the inner ring plate has multiple buckle slots arranged in a ring array, and a third elastic hook is fixedly connected to the lower edge of the central buckle, the third elastic hook being located in the buckle slot of the inner ring plate.

[0011] Further specifying, the rotating snap-fit ​​component includes three sets of snap feet fixedly connected to the outer periphery of the buckle, and the lower side of the base is provided with a snap groove that matches the snap feet, and the three sets of snap feet have different shapes.

[0012] Furthermore, the bottom surface of the protective cover is arc-shaped, and the upper part of the protective cover is connected to the bottom surface by ribs.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] In this invention, the base and the middle buckle are easy to disassemble. By rotating the middle buckle, the locking feet are aligned with the locking grooves of the base, and the middle buckle and the base can be separated. There is no need to connect the base and the middle buckle with screws. The connection between the middle buckle and the base is convenient and easy to disassemble. At the same time, by setting the three sets of locking feet to different shapes, the unique assembly of the middle buckle and the base can be ensured.

[0015] The protective cover of this invention is arc-shaped. When the protective cover falls, the impact on the protective cover will be dispersed along the arc, which can withstand a greater impact than the prior art.

[0016] This utility model has no screw connections between the base and the central buckle, and between the central buckle and the circuit board, etc., making it easy to disassemble. Attached Figure Description

[0017] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0018] Figure 1 This is a schematic diagram of the structure of the point-type smoke and temperature fire detector of this utility model;

[0019] Figure 2 This is an exploded view of the point-type smoke and temperature fire detector of this utility model;

[0020] Figure 3 This is a top view of the base of this utility model;

[0021] Figure 4 This is a schematic diagram of the lower side of the opening in this utility model;

[0022] Figure 5 This is a lower side view of the buckle and mounting plate assembly in this utility model;

[0023] Figure 6 Side view of the protective cover and mounting plate assembly of this utility model;

[0024] The symbols for the main components are explained below:

[0025] Base 1, contact spring 11;

[0026] 2. Middle buckle 2; 21. Second elastic hook 2; 23. Third elastic hook 2;

[0027] Circuit board 3, temperature sensor 4;

[0028] Mounting plate 5, first elastic hook 51, circular part 52, positioning bone 53;

[0029] 6. Protective cover, 61. Inner ring plate, 7. Rotary snap fastener, 71. Detailed Implementation

[0030] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] like Figure 1-6 As shown, the point-type smoke and temperature fire detector includes a base 1, with a contact spring 11 electrically connected inside the base 1. A middle buckle 2 is provided at the lower part of the base 1, and the contact end of the contact spring 11 is electrically connected to the middle buckle 2. A circuit board 3 is provided at the lower part of the middle buckle 2, and a temperature sensor 4 is connected to the lower side of the circuit board 3. A mounting plate 5 is provided at the lower part of the temperature sensor 4. A protective cover 6 is connected to the base 1, and the mounting plate 5 is located inside the protective cover 6. A mounting hole for the temperature sensor 4 is opened in the middle of the mounting plate 5. The mounting plate 5, the circuit board 3, and the middle buckle 2 are interlocked. A rotating snap-fit ​​component 7 is provided between the base 1 and the middle buckle 2. The cross-section of the protective cover 6 is conical, and the protective cover 6 has multiple openings in a ring.

[0032] In this embodiment, the base 1 is provided with a connecting part, which has a straight groove. A connecting screw is connected to the ceiling in the straight groove, thereby fixing the base 1 to the ceiling. The connecting part is provided with anti-slip texture to effectively prevent the screw from loosening. The temperature sensor 4 is used to obtain the external temperature. The circuit board 3 obtains the external temperature information through the temperature sensor 4. The protective cover has multiple openings to facilitate timely acquisition of the external temperature. The protective cover 6 is arc-shaped, which can effectively reduce the impact when the protective cover 6 is accidentally dropped. The contact spring 11 is used to conduct electricity with the circuit board 3. When the base 1 and the middle buckle 2 are rotated and fastened, the contact spring 11 also rotates to the position of conducting electricity with the circuit board 3. The mounting plate 5 and the circuit board 3 are fastened together by a fastener, which is convenient for disassembly. At the same time, there is no need to connect the mounting plate 5, the circuit board 3 and the middle buckle 2 with screws.

[0033] Reference Figure 2 and Figure 4 A first elastic hook 51 is fixedly connected to the upper side of the mounting plate 5, with its head positioned above the slot in the circuit board 3. A second elastic hook 21 is fixedly connected to the lower side of the middle buckle 2, with its head positioned below the slot in the circuit board 3. In this embodiment, the first elastic hook 51 connects the circuit board 3 and the mounting plate 5 simultaneously, while the second elastic hook 21 connects the middle buckle 2 to the circuit board 3. Thus, the mounting plate 5, the circuit board 3, and the middle buckle 2 are connected by hooks. The hook portion is an inclined slope that gradually widens upwards. When the hook is engaged in the slot, the hook portion contacts the surface of the circuit board 3. When it is necessary to separate the circuit board 3 from other components, the hook can be shifted to align with the slot to separate the hook from the circuit board.

[0034] A light-transmitting indicator light is installed on the surface of the protective cover 6, and the light-transmitting indicator light is connected to the signal of the circuit board 3.

[0035] Reference Figure 5-6 A circular ring 52 is fixedly connected to the upper side of the mounting plate 5. The upper side of the circular ring 52 contacts the circuit board 3. The temperature sensor 4 is located inside the circular ring 52. A positioning bone 53 is fixedly connected to the ring portion of the circular ring 52, and the upper end of the positioning bone 53 is located above the circuit board 3. In this embodiment, the circular ring 52 is used to prevent the circuit board 13 from moving downward, thereby limiting the position of the circuit board 13 by the first elastic hook 51 and the circular ring 52. The positioning bone 53 is used to limit the relative position between the mounting plate 5 and the circuit board 3.

[0036] Reference Figure 6An inner ring plate 61 is fixedly connected to the inner side of the protective cover 6. The inner ring plate 61 has multiple buckle slots arranged in a circular array. A third elastic hook 23 is fixedly connected to the lower edge of the central buckle 2, and the third elastic hook 23 is located within the buckle slot of the inner ring plate 61. In this embodiment, the third elastic hook 23 is used to connect with the inner ring plate 61 of the protective cover 6, thereby connecting the protective cover 6 with the central buckle 2.

[0037] Reference Figure 4 and Figure 6 The rotating snap-fit ​​component 7 includes three sets of snap-fit ​​feet 71 fixedly connected to the outer periphery of the middle snap fastener 2. The lower side of the base 1 has a slot that matches the snap-fit ​​feet 71. The three sets of snap-fit ​​feet 71 have different shapes. In this embodiment, by setting three sets of snap-fit ​​feet 71 with different shapes, the snap-fit ​​feet 71 and the slots correspond one-to-one, thus ensuring that the snap-fit ​​position between the middle snap fastener 2 and the base 1 is unique. When the snap-fit ​​feet 71 are snapped into the slots, the snap-fit ​​feet of the middle snap fastener 2 are rotated into the slots and locked, thereby connecting the base 1 and the middle snap fastener 2. At the same time, the contact spring 11 rotates to contact the circuit board 3, and the contact spring 11 is electrically connected to the circuit board 3.

[0038] Reference Figure 1 The bottom surface of the protective cover 6 is arc-shaped, and the upper part of the protective cover 6 is connected to the bottom surface by ribs. In this embodiment, the bottom surface of the protective cover 6 is an arc-shaped surface. When the protective cover 6 falls to the ground, the arc-shaped bottom surface contacts the ground first, and the impact force on the bottom surface is dispersed along the arc surface, which can effectively reduce the impact on the bottom surface. Compared with the existing flat bottom surface, it has better impact resistance. The upper part and the bottom of the protective cover 6 are connected by ribs, which increases the space for smoke and dust to pass through, so that the temperature sensor can detect the temperature of the smoke and dust more quickly.

[0039] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0040] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A point-type smoke and heat detector, comprising a base (1) in which a contact spring (11) is electrically connected, characterized in that: The lower part of the base (1) is provided with a middle buckle (2), the contact end of the contact spring (11) is in conductive connection with the middle buckle (2), the lower part of the middle buckle (2) is provided with a circuit board (3), the lower side of the circuit board (3) is connected with a temperature sensor (4), the lower part of the temperature sensor (4) is provided with a mounting disc (5), the base (1) is connected with a protective cover (6), the mounting disc (5) is located in the protective cover (6), the middle part of the mounting disc (5) is provided with a mounting hole for the temperature sensor (4), the mounting disc (5), the circuit board (3) and the middle buckle (2) are mutually buckled and connected, a rotating clamping piece (7) is arranged between the base (1) and the middle buckle (2), the cross section of the protective cover (6) is in the shape of a tapered arc, and the protective cover (6) is annularly provided with a plurality of through openings.

2. A point type smoke and heat fire detector according to claim 1, characterised in that: The upper side of the mounting disc (5) is fixedly connected with a first elastic clamping hook (51), the head of the first elastic clamping hook (51) is located above the clamping groove of the circuit board (3), and the lower side of the middle buckle (2) is fixedly connected with a second elastic clamping hook (21), the head of the second elastic clamping hook (21) is located below the clamping groove of the circuit board (3).

3. The point-type smoke and heat fire detector according to claim 1, wherein: A light-transmitting indicating lamp is mounted on the surface of the protective cover (6) and is in signal connection with the circuit board (3).

4. A point type smoke and heat fire detector according to claim 3, wherein: The upper side of the mounting disc (5) is fixedly connected with a circular ring part (52), the upper side of the circular ring part (52) is in contact with the circuit board (3), the temperature sensor (4) is located in the circular ring part (52), a positioning bone (53) is fixedly connected in the ring part of the circular ring part (52), and the upper end of the positioning bone (53) is located above the circuit board (3).

5. The point-type smoke and heat fire detector according to claim 1, wherein: The inner side of the protective cover (6) is fixedly connected with an inner ring plate (61), a plurality of buckle grooves are annularly and arrayed in the inner ring plate (61), the lower side of the edge of the middle buckle (2) is fixedly connected with a third elastic clamping hook (23), and the third elastic clamping hook (23) is located in the buckle groove of the inner ring plate (61).

6. The point-type smoke and heat fire detector according to claim 1, wherein: The rotating clamping piece (7) comprises three groups of clamping legs (71) fixedly connected to the outer periphery of the middle buckle (2), the lower side of the base (1) is provided with a clamping groove matched with the clamping legs (71), and the three groups of clamping legs (71) are different in shape.

7. The point-type smoke and heat fire detector according to claim 1, wherein: The bottom surface of the protective cover (6) is in the shape of a circular arc, and the upper part of the protective cover (6) is connected with the bottom surface through a rib.

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