CN210155794U

CN210155794U - Liftable fire alarm

Info

Publication number: CN210155794U
Application number: CN201921465396.1U
Authority: CN
Inventors: 程玉印
Original assignee: NINGBO ANPO ELECTRONICS Co Ltd
Current assignee: NINGBO ANPO ELECTRONICS Co Ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-03-17
Anticipated expiration: 2029-09-04

Abstract

The utility model discloses a liftable fire alarm ware, including alarm body and mount pad, wherein, the alarm body is used for fire early warning, the mount pad is installed at the top of alarm body for be connected with the ceiling, still including being connected the alarm body with the elevating system of mount pad, the mount pad detachable is liftably installed the top of alarm body, elevating system is used for the drive the alarm body is relative the mount pad rises and descends, just the elevating system drive the alarm body is relative when the mount pad descends, the alarm body with the mount pad separation. The utility model discloses a liftable fire alarm, alarm body and mount pad can separate, and are connected through elevating system, make the height of alarm body can go up and down, change the battery at needs, can be with the high decline of alarm body to make things convenient for people to change the battery.

Description

Liftable fire alarm

Technical Field

The utility model relates to an alarm technical field especially relates to a liftable fire alarm ware.

Background

With the increase of fire and electricity consumption in modern hotels, restaurants, entertainment places, families and the like, the frequency of various fires is higher and higher. In order to enable early detection and to avoid major life and property losses, it is common to equip people with alarm devices. The alarm in the prior art has various types and styles, mainly comprises the types of ions, photoelectricity, temperature sensing and the like from the principle function, and utilizes a high-sensitivity detection element arranged in the alarm to capture abnormal changes of temperature, gas content and the like in the air and send an alarm signal. The alarm is generally installed on the ceiling, so after the battery is used up, a ladder or a special tool is needed to replace the battery, which is very inconvenient or even has certain risks for the old with inconvenient actions, the disabled and the pregnant women.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a fire alarm device capable of being lifted and lowered in order to solve the above-mentioned problems.

The utility model provides a liftable fire alarm ware, including alarm body and mount pad, wherein, the alarm body is used for the fire early warning, the mount pad is installed at the top of alarm body for be connected with the ceiling, still including being connected the alarm body with the elevating system of mount pad, the mount pad detachable is liftably installed the top of alarm body, elevating system is used for the drive the alarm body is relative the mount pad rises and descends, just the elevating system drive the alarm body is relative when the mount pad descends, the alarm body with the mount pad separation.

Further, elevating system includes the pars contractilis and is used for the drive the flexible drive division of pars contractilis, the drive division is installed this is internal for the alarm, the one end of pars contractilis with the drive division is connected, the other end of pars contractilis is worn out the alarm body and with the mount pad is connected.

Further, the pars contractilis the conveyer belt, the drive division include driving motor and with the reel that driving motor connects, the one end roll-up of conveyer belt is in on the reel, the other end of conveyer belt is worn out the alarm body with mount pad fixed connection, the driving motor drive the reel roll-up during the conveyer belt, the alarm body is relative the mount pad rises, the driving motor drive the reel is right when the conveyer belt unwinds, the alarm body is relative the mount pad descends.

Further, still include with the first controller that driving motor is connected, first controller is when the electric quantity of the inside battery of alarm body falls to the threshold value, first controller control driving motor drive the reel is to the conveyer belt unreels.

Further, still include battery power sampling module, battery power sampling module with first controller is connected, battery power sampling module is used for gathering the electric quantity information of battery.

The alarm body is connected with the first controller, and when the number of rotating circles of the driving motor reaches a preset value in the process that the alarm body descends relative to the mounting seat, the first controller controls the driving motor to stop rotating.

Further, the Hall counting module comprises a Hall sensor and a magnet matched with the Hall sensor, the magnet is installed on the winding drum, and the Hall counting module acquires the magnetic field of the magnet through the Hall sensor to acquire the number of turns of the rotation of the driving motor.

Further, in the axial of reel, hall inductor is located one side of reel, magnet is installed the one end and the eccentric settings of reel near hall inductor.

Further, still include the contact switch, the contact switch install the top of alarm body and with first controller is connected, and is in the mount pad is installed when the top of alarm body is gone up, the bottom of mount pad with the contact switch butt, the contact switch closes, first controller closes driving motor.

Further, the automatic winding device comprises a manual switch, wherein the manual switch is arranged on the side portion of the alarm body and connected with the first controller, and when the manual switch is closed, the first controller opens the driving motor and controls the driving motor to drive the winding drum to wind the conveyor belt.

Due to the application of the technical scheme, compared with the prior art, the utility model, have following advantage:

(1) the utility model provides a fire alarm of liftable can install at the top of alarm body through the mount pad separately, still is connected with elevating system between mount pad and the alarm body, and elevating system can drive the relative mount pad of alarm body and rise and descend, and when elevating system drive alarm body descends, can make the high reduction of alarm body, conveniently change this internal battery of alarm.

(2) The first controller in the lifting mechanism can control the driving motor to drive the alarm body to descend relative to the mounting seat when the electric quantity of the storage battery in the alarm body is reduced to a threshold value, so that the alarm body automatically descends when the electric quantity of the storage battery is insufficient, and people can be reminded to replace the storage battery when the storage battery is conveniently replaced.

(3) The number of turns of the rotating of the driving motor is calculated by the Hall counting module, so that when the alarm body drops the preset value, the driving motor is controlled to be closed by the first controller, the storage battery is conveniently replaced, the power loss can be reduced, and meanwhile, the alarm body can be prevented from being excessively lowered to cause structural damage.

(4) The contact switch is arranged at the top of the alarm body, when the mounting seat is mounted at the top of the alarm body, the mounting seat is abutted to the contact switch, the contact switch is closed, the first controller controls the driving motor to be closed, the mounting seat is mounted on the alarm body at the moment, and structural damage caused by excessive rising of the alarm body can be prevented.

(5) The driving part adopts a mode that a driving motor is connected with a winding drum, the telescopic part adopts a conveyor belt, the lifting mode of the lifting mechanism is gentle, and the structural damage caused by quick lifting can be avoided.

Drawings

Fig. 1 is a perspective view of a liftable fire alarm device according to an embodiment of the present invention, in which an alarm device body and a mounting seat are separated from each other.

Fig. 2 is a perspective view of fig. 1 with the probe removed.

Fig. 3 is a perspective assembly view of fig. 2.

Fig. 4 is a cross-sectional view of fig. 2.

Fig. 5 is an exploded view of fig. 3.

Fig. 6 is a schematic circuit diagram of a liftable fire alarm device according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-5, an embodiment of the present invention provides a liftable fire alarm, including an alarm body 1, a mounting base 2, and a lifting mechanism 3. Wherein, alarm body 1 is the major structure of alarm for to fire early warning. The mounting seat 2 is used for being connected with a ceiling, and the mounting seat 2 is detachably mounted at the top of the alarm body 1. The lifting mechanism 3 is connected with the mounting seat 2 and the alarm body 1 simultaneously and used for driving the alarm body 1 to ascend and descend relative to the mounting seat 2, the mounting seat 2 can be mounted at the top of the alarm body 1 when the alarm body 1 ascends relative to the mounting seat 2, and the alarm body 1 is separated from the mounting seat 2 when the alarm body 1 descends relative to the mounting seat 2.

In the present embodiment, the lifting mechanism 3 includes a telescopic portion 31 and a driving portion 32 for driving the telescopic portion 31 to expand and contract. The driving part 32 is installed in the alarm body 1, one end of the telescopic part 31 is connected with the driving part 32, and the other end of the telescopic part 31 penetrates out of the alarm body 1 and is connected with the mounting seat 2. It can be understood that when the driving portion 32 drives the extendable portion 31 to extend, the alarm body 1 descends relative to the mounting base 2, and when the driving portion 32 drives the extendable portion 31 to retract, the alarm body 1 ascends relative to the mounting base 2.

In this embodiment, the telescopic portion 31 is a conveyor belt, the driving portion 32 includes a driving motor 33 and a winding drum 34 connected to the driving motor 33, one end of the conveyor belt is wound on the winding drum 34, and the other end of the conveyor belt penetrates through the alarm body 1 and is fixedly connected to the mounting seat 2. When the driving motor 33 drives the reel 34 to wind the belt, the alarm body 1 is raised relative to the mounting base 2, and when the driving motor 33 drives the reel 34 to unwind the belt, the alarm body 1 is lowered relative to the mounting base 2. It can be understood that the driving motor 33 can rotate forward and backward, the driving motor 33 drives the winding drum 34 to wind the conveying belt in forward rotation, for example, the winding drum 34 is driven to unwind the conveying belt in backward rotation, when the conveying belt is wound, the length of the conveying belt between the alarm body 1 and the mounting seat 2 is shortened, the alarm body 1 ascends relative to the mounting seat 2, when the conveying belt is unwound, the length of the conveying belt between the alarm body 1 and the mounting seat 2 is lengthened, the alarm body 1 descends relative to the mounting seat 2, and it can be understood that when the mounting seat 2 is mounted on the alarm body 1, the positions of the alarm body 1 and the mounting seat 2 are kept fixed through the tension of the conveying belt. In other embodiments, the lifting mechanism 3 may be a hinged telescopic device, a hydraulic cylinder or an air cylinder. It should be noted that, when a hydraulic cylinder or an air cylinder is adopted as the lifting mechanism 3, the driving portion 32 is a driving cylinder, and the expansion portion 31 is a driving rod installed on the driving cylinder, and the specific expansion principle is the prior art, and is not described herein again; when the lifting mechanism 3 is a hinge type telescopic device, the driving part 32 is a driving part therein, and the telescopic part 31 is a telescopic hinge, and the specific telescopic principle thereof is the prior art, and is not described herein again.

Please refer to fig. 6 in combination, in this embodiment, the liftable fire alarm apparatus of the present invention further includes a first controller U1, the driving motor 33 is connected to the first controller U1, the first controller U1 is used for controlling the opening and closing of the driving motor 33, and controlling the forward rotation and reverse rotation of the driving motor 33, and when the electric quantity of the battery 11 inside the alarm apparatus body 1 of the first controller U1 is reduced to the threshold value, the first controller U1 controls the driving motor 33 to drive the winding drum 34 to unwind the conveyor belt, so that the alarm apparatus body 1 is lowered relative to the mounting base 2. It is understood that a driving circuit is connected between the first controller U1 and the driving motor 33, and the driving circuit is prior art and will not be described herein.

Please refer to fig. 6 in combination, in this embodiment, the liftable fire alarm apparatus of the present invention further includes a battery power sampling module 122, the battery power sampling module 122 is connected to the first controller U1, the battery power sampling module 122 is used for collecting the power of the battery 11, when the power sampling module 122 collects the power of the battery 11 and drops to the threshold value, the first controller U1 controls the driving motor 33 to drive the winding drum 34 to unwind the conveyor belt.

Specifically, the alarm body 1 is further provided with a second controller 2, and the electric quantity sampling module 122 is connected with the first controller U1 through the second controller U2. And various electronic components such as the probe 10 forming the alarm are electrically connected to the second controller U2, and the types of the various electronic components forming the alarm, the connection mode with the second controller U2, and the working principle between the second controller U2 and the various electronic components forming the alarm are the prior art, and are not described herein again. Meanwhile, the second controller U2 is further connected to a power supply module 120, the power supply module 120 includes the above-mentioned battery 11 and a peripheral power supply circuit, the power supply module 120 supplies power to the entire device, and the peripheral circuit is a conventional power supply circuit and is not described herein again. Of course, in other embodiments, the second controller U2 may not be included, and each electronic component implementing the alarm function is connected to the first controller U1.

It should be noted that the battery power sampling module 122 sends the collected battery power information to the second controller U2, when the second controller U2 determines that the battery power information of the storage battery 11 falls to the threshold value according to the received battery power information, the first controller U1 outputs a first control signal, and the first controller U1 controls the driving motor 33 to drive the winding drum 34 to unwind the conveyor belt, so that the alarm body 1 falls relative to the mounting base 2. In this embodiment, the battery power sampling module 122 is a battery voltage sampling circuit, and the specific structure thereof is the prior art and is not described herein again.

Please refer to fig. 6 in combination, in this embodiment, the liftable fire alarm apparatus of the present invention further includes a hall counting module 123 for calculating the number of rotation turns of the driving motor 33, the hall counting module 123 includes a hall sensor (not shown) and a magnet 4 adapted to the hall sensor, the magnet 4 is installed on the winding drum 34, and the hall counting module 123 obtains the number of rotation turns of the driving motor 33 through the magnetic field of the hall sensor induction magnet 4. It should be noted that the hall sensor is further connected to a peripheral circuit for implementing a counting function, the peripheral circuit is the prior art, and the connection mode and the working principle thereof are the prior art and are not described herein again.

It can be understood that, every time the driving motor 33 drives the winding drum to rotate for one turn, the hall sensor in the hall counting module 123 senses the magnetic field of the magnet 4 once, the hall counting module 123 counts and adds one, that is, the number of turns of the driving motor 33 rotates adds one, that is, the hall counting module 123 obtains the number of turns of the driving motor 33, and certainly, after the driving motor 33 stops working, the hall counting module 123 automatically clears the number of turns of the rotation. In the present embodiment, in the axial direction of the winding drum 34, the hall sensor is located at one side of the winding drum 34, and the magnet 4 is installed at one end of the winding drum 34 close to the hall sensor and is eccentrically arranged, so as to ensure that the hall counting module 123 can accurately obtain the number of rotation turns of the driving motor 33. In addition, the position of the hall sensor needs to ensure that the magnet 4 is just opposite to the hall sensor once when the winding drum 34 rotates for one circle, so as to ensure that the hall sensor can sense the magnetic field of the magnet 4. Specifically, in the present embodiment, the hall sensor is mounted below the circuit board 12, for example, and the circuit board 12 will be described in detail below.

Specifically, in this embodiment, the hall counting module 123 is connected to the first controller U1 through the second controller U2, the hall counting module 123 transmits the acquired number of turns to the second controller U2, and when the number of turns of the driving motor 33 reaches a predetermined value during the descent of the alarm body 1 relative to the mounting base 2, the second controller U2 sends a second control signal to the first controller U1, and the first controller U1 controls the driving motor 33 to stop rotating. It can be understood that, after the electric quantity of the alarm body 1 in the storage battery 11 is reduced to the threshold value, the driving motor 33 drives the alarm body 1 to be reduced and separated from the mounting seat 2, after the number of rotation turns of the driving motor 33 reaches the preset value, the alarm body 1 is reduced by a certain distance, and the storage battery can be conveniently replaced by people due to the height of the alarm body 1. Of course, in order to set the predetermined value of the number of rotations of the drive motor 33 for convenience, it is possible to set the number of rotations required of the drive motor 33 as the predetermined value stored in the second controller U2 so that the alarm body 1 is mounted with the mount 2 until the conveyor belt is in the fully unwound state.

Referring to fig. 6, in this embodiment, the liftable fire alarm apparatus of the present invention further includes a contact switch 125, the contact switch 125 is installed at the top of the alarm apparatus body 1 and connected to the first controller U1, and when the installation seat 2 is installed at the top of the alarm apparatus body 1, the bottom of the installation seat 2 abuts against the contact switch 125, the contact switch 125 is closed, and the driving motor 33 is closed by the first controller U1.

Specifically, the contact switch 125 is connected to the first controller U1 through the second controller U2. More specifically, one end of the contact switch 125 is connected to the second controller U2, and the other end is grounded, and when the contact switch 125 is turned off, the second controller U2 outputs a second control signal to the first controller U1, and the first controller U1 turns off the driving motor 33. It can be understood that, when the driving motor 33 drives the alarm body 1 to ascend, so that the mounting base 2 is mounted on the alarm body 1, and after the mounting base 2 is mounted on the alarm body 1, the alarm body 1 cannot ascend continuously, at this time, the bottom of the mounting base 2 presses the contact switch 125, so that the contact switch 125 is closed, and the driving motor 33 is closed, so that structural damage to the whole device caused by excessive ascending of the alarm body 1 can be avoided.

Referring to fig. 6, in this embodiment, the liftable fire alarm device of the present invention further includes a manual switch 126, the manual switch 126 is installed at a side portion of the alarm device body 1 and connected to the first controller U1, and when the manual switch 126 is closed, the first controller U1 turns on the driving motor 33 and controls the driving motor 33 to drive the winding drum 34 to wind the conveyor belt.

Specifically, the manual switch 126 is connected to the second controller U2 and the first controller U1, and more specifically, one end of the manual switch 126 is connected to the second controller U2, and the other end is grounded.

It can be understood that after the storage battery 11 is replaced, the manual switch 126 can be closed by pressing the button of the manual switch 126, after the manual switch 126 is closed, the second controller U2 outputs a third control signal to the first controller U1, and the first controller U1 turns on the driving motor 33 to control the driving motor 33 to drive the alarm body 1 to ascend, so that the alarm body 1 ascends to the use state installed with the mounting seat 2.

Referring to fig. 3 to 5, in the present embodiment, a circuit board 12 is further installed in the alarm body 1, wherein the circuit board 12 is used for the electronic components to realize connection between the electronic components. In the embodiment, the first controller U1, the second controller U2, the hall sensor and the peripheral circuits can be directly mounted on the circuit board 12, and the mounting positions can be arranged according to actual requirements, such as the internal space of the alarm body 1 and electromagnetic interference resistance.

In the present embodiment, the circuit board 12 is located on one side of the winding drum 34 in the axial direction of the winding drum 34, and the magnet 4 is installed at one end of the winding drum 34 close to the circuit board 12 and is eccentrically arranged, so as to ensure that the magnet 4 can be matched with the hall sensor on the circuit board 12.

In the present embodiment, the winding drum 34 includes a winding shaft 340 and two flanges 342 disposed on the winding shaft 340 and opposite to each other, wherein the circuit board 12 is disposed on one side of one of the flanges 342 in the axial direction of the winding drum 34, and the magnet 4 is mounted on the flange 342, thereby ensuring that the magnet 4 is eccentrically disposed on the winding drum 34. In this embodiment, two flanges 342 are provided adjacent the ends of the spool 340 and extend radially outward from the circumference of the spool 340.

In this embodiment, a groove 343 extending along the axial direction of the winding shaft 340 is formed in the winding shaft 340, a first fixing column 344 is fixedly mounted in the groove 343, and the end of one end of the conveyor belt is wound on the winding shaft 340 after being wrapped around the first fixing column 344 and fixed by adhesive. When the conveyor belt is connected with the first fixing column 344, the end of the conveyor belt is folded, the first fixing column 344 is wrapped into the conveyor belt, the end of the conveyor belt is adhered together through the adhesive to be fixed with the first fixing column 344, and finally the first fixing column 344 is fixed in the groove.

Preferably, an anti-slip rod 345 is fixedly connected between the two flanges 342, the anti-slip rod 345 faces the groove 343, a gap is formed between the anti-slip rod 345 and the first fixing column 344, the conveyor belt passes through the gap between the anti-slip rod 345 and the first fixing column 344 and wraps the anti-slip rod 344 and the winding shaft 340 at the same time to be wound on the winding drum 34, and when the conveyor belt is wound, the anti-slip rod 345 can abut against the first fixing column 344 when the first fixing column 344 is separated from the groove 343, so that the first fixing column 344 is prevented from being separated from the groove 343.

In this embodiment, the alarm body 1 further includes an upper housing 13 and a lower housing 14 combined with the upper housing 13, the circuit board 12, the battery 11, the driving motor 33 and the winding drum 34 are all fixedly mounted on a bottom plate of the lower housing 14, the probe 10 is mounted at the bottom of the lower housing 14, and the conveyor belt vertically penetrates through the upper housing 13 and then is fixedly connected with the mounting base 2.

Specifically, two opposite mounting frames 140 are disposed on the bottom plate of the lower housing 14, a pivot groove 141 is disposed on the top of each mounting frame 140, the winding shaft 340 can be rotatably mounted in the pivot groove 141, the winding drum 34 further includes a combining block 346 disposed at two opposite ends of the winding shaft 340, and each mounting frame 140 is located between the corresponding combining block 346 and the flange plate 342. A coupling block 346 remote from the circuit board 12 is connected to the output shaft of the drive motor 33.

A lower fixing frame 142 is further disposed on the bottom plate of the lower casing 14 at an outer side of the mounting frame 140 away from the circuit board 12, an upper fixing frame 143 is fittingly connected to a top of the lower fixing frame 142, and a main body of the driving motor 33 is clamped between the upper fixing frame 142 and the lower fixing frame 143. The top of the lower fixing frame 142 is provided with an upper half groove 144, the bottom of the upper fixing frame 143 is provided with a lower half groove 145 matched with the upper half groove 144, the upper half groove 144 and the lower half groove 145 enclose a clamping groove, the main body of the driving motor 33 is clamped in the clamping groove, the bottom surface of the upper fixing frame 143 is connected with the top surface of the lower fixing frame 142 and is fixed through fixing parts such as screws, and the driving motor 33 is fixedly arranged on the bottom plate. It should be noted that the two mounting brackets 140 and the lower fixing bracket 142 are disposed at intervals in the axial direction of the winding drum 34, so that after the driving motor 33 is fixed, the axial direction of the output shaft of the driving motor 33 is the same as the axial direction of the winding drum 34, which is convenient for connecting the winding drum 34 with the output shaft of the driving motor 33.

The circuit board 12 and the probe 10 are mounted to the lower housing 14 in a manner known in the art and will not be described in detail herein.

In this embodiment, the top plate of the upper housing 13 is recessed to form a mounting cavity 130, the shape of the mounting cavity 130 is substantially the same as that of the mounting seat 2, and the size of the mounting cavity 130 is slightly larger than that of the mounting seat 2, so that the mounting seat 2 can be conveniently separated from the mounting cavity 130 after being accommodated in the mounting cavity 130, and meanwhile, the mounting seat 2 can conveniently enter the accommodating cavity 130 and be mounted together with the alarm body 1. The top plate of the upper housing 13 is provided with a mounting hole 131 for mounting the contact switch 125, the mounting hole 131 is communicated with the accommodating cavity 130, the contact switch 125 is fixed in the mounting hole 131, and the contact of the contact switch 125 protrudes into the accommodating cavity 130, so that after the mounting base 2 is accommodated in the mounting cavity 130, the bottom of the mounting base 2 can be pressed against the contact switch 125, and the contact switch 125 is closed. Still be equipped with the first bar hole 132 that supplies the conveyer belt to wear to establish on the roof of going up casing 13, first bar hole 132 and installation cavity 130 intercommunication to the conveyer belt is worn out along vertical direction from the top of last casing 13 and is connected with mount pad 2.

The mounting base 2 includes a fitting block 22 and a mounting plate 23 fitted on the top of the fitting block 22, the fitting block 22 is accommodated in the mounting cavity 130, the top surface of the fitting block 22 is provided with an accommodating cavity 220, the mounting plate 23 is clamped in the accommodating cavity 220, the mounting plate 23 is provided with a mounting hole 230 through which a fixing member such as a screw can pass to fix the mounting base 2 on a ceiling. The tabling block 22 is further provided with a second strip-shaped hole 221 penetrating through the bottom wall of the accommodating cavity 220 and the bottom surface of the tabling block 22, the second strip-shaped hole 221 is used for a conveyor belt to pass through, the conveyor belt passes through the second strip-shaped hole 221 and is fixed with a second fixing column 222, and the second fixing column 222 is abutted against the bottom wall of the accommodating cavity 220 under the tension action of the conveyor belt, so that the conveyor belt is fixed with the mounting seat 2. In this embodiment, two ends of the second fixing pillar 222 may be bent to form U-shaped anti-falling portions, for example, so as to prevent the second fixing pillar 222 from passing through the second strip-shaped hole 221. The connection mode between the second fixing column 222 and the conveyor belt is the same as that between the first fixing column 344 and the conveyor belt, and is not described again here.

In the embodiment, the mounting plate 23 is provided with the avoiding hole 232 penetrating through the top surface and the bottom surface of the mounting plate 23, and the second fixing post 222 is located in the avoiding hole 232 to prevent the second fixing post 222 from influencing the receiving cavity 220 of the mounting plate 23 embedded in the embedding block 22.

In this embodiment, the receiving cavity 220 is circular, the mounting plate 23 is flat, two blocking pieces 224 are symmetrically disposed on the side wall of the receiving cavity 220, two avoiding grooves 234 combined with the two blocking pieces 224 are disposed at the edge of the top surface of the mounting plate 23, the mounting plate 23 is clamped in the receiving cavity 220, and the blocking pieces 224 are combined with the avoiding grooves 234, so as to ensure the fixing strength of the mounting plate 23 in the engaging block 22 and prevent the mounting plate 23 from being separated from the engaging block 22 under the pulling force of the conveyor belt. The stopper 224 is an arc-shaped wedge, and the avoiding groove 234 is an arc-shaped wedge, so that the mounting plate 23 is held by the stopper 224 by rotating the mounting plate 23 after being placed in the accommodating chamber 220 and then the stopper 224 is engaged with the avoiding groove 234.

The utility model has the advantages as follows:

1. the utility model provides a fire alarm of liftable installs at the top of alarm body 1 through 2 detachably of mount pad, still is connected with elevating system 3 between mount pad 2 and the alarm body 1, and elevating system 3 can drive 2 rises and descend of 1 relative mount pads of alarm body, when elevating system 3 drive alarm body 1 descends, can make the height reduction of alarm body 1, conveniently change the battery in the alarm body 1.

2. First controller U1 among elevating system 3 can be when the electric quantity of battery 11 in alarm body 1 drops to the threshold value, and control driving motor 33 drive alarm body 1 descends for mount pad 2 relatively, realizes when the electric quantity in battery 11 is not enough, and alarm body 1 descends automatically, can remind people to change battery 11 when conveniently changing battery 11.

3. Calculate the number of turns of driving motor 33 pivoted through setting up hall count module 123, like this when alarm body 1 descends the predetermined value, first controller U1 control driving motor 33 closes, when conveniently changing battery 11, can reduce the power loss, and prevent the structural damage that alarm body 1 excessively descends and lead to.

4. Through setting up contact switch at the top of alarm body, when the mount pad was installed at the top of alarm body, mount pad and contact switch butt, contact switch is closed, and first controller control drive motor closes, and the mount pad has been installed on the alarm body this moment, can prevent the structural damage that the alarm body excessively rises and lead to.

5. The lifting mechanism 3 comprises a driving part 32 and a telescopic part 31 in the lifting mechanism 3, wherein the driving part 32 adopts a mode that a driving motor 33 is connected with a winding drum 34, and the telescopic part 31 adopts a conveyor belt.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a liftable fire alarm ware, includes alarm body (1) and mount pad (2), wherein, alarm body (1) is used for fire early warning, install at the top of alarm body (1) mount pad (2) for be connected with the ceiling, its characterized in that, still including connecting alarm body (1) with elevating system (3) of mount pad (2), mount pad (2) detachable liftoff is installed the top of alarm body (1), elevating system (3) are used for the drive alarm body (1) is relative mount pad (2) rise and descend, just elevating system (3) drive alarm body (1) is relative when mount pad (2) descend, alarm body (1) with mount pad (2) separation.

2. A liftable fire alarm according to claim 1, characterised in that: elevating system (3) are including pars contractilis (31) and be used for the drive the flexible drive division (32) of pars contractilis (31), install drive division (32) in alarm body (1), the one end of pars contractilis (31) with drive division (32) are connected, the other end of pars contractilis (31) is worn out alarm body (1) and with mount pad (2) are connected.

3. A liftable fire alarm according to claim 2, characterised in that: expansion part (31) are the conveyer belt, drive division (32) include driving motor (33) and with reel (34) that driving motor (33) are connected, the one end roll-up of conveyer belt is in on reel (34), the other end of conveyer belt is worn out alarm body (1) with mount pad (2) fixed connection, driving motor (33) drive reel (34) roll-up during the conveyer belt, alarm body (1) is relative mount pad (2) rise, driving motor (33) drive reel (34) are right during the conveyer belt unreels, alarm body (1) is relative mount pad (2) descend.

4. A liftable fire alarm according to claim 3, characterised in that: still include with first controller (U1) that driving motor (33) are connected, first controller (U1) are in when the electric quantity of battery (11) inside alarm body (1) drops to the threshold value, first controller (U1) control driving motor (33) drive reel (34) are to the conveyer belt unreels.

5. A liftable fire alarm according to claim 4, characterised in that: still include battery power sampling module (122), battery power sampling module (122) with first controller (U1) is connected, battery power sampling module (122) are used for gathering the electric quantity information of battery (11).

6. A liftable fire alarm according to claim 4, characterised in that: still including being used for calculating the hall count module (123) of driving motor (33) rotation number of turns, hall count module (123) with first controller (U1) are connected alarm body (1) is relative in-process that mount pad (2) descend, when driving motor (33) pivoted number of turns reaches the predetermined value, first controller (U1) control driving motor (33) stall.

7. A liftable fire alarm device according to claim 6, characterised in that: hall count module (123) including the Hall sensor and with magnet (4) of Hall sensor adaptation, magnet (4) are installed on reel (34), Hall count module (123) are passed through the Hall sensor acquires magnet (4) magnetic field acquires driving motor (33) rotates the number of turns.

8. A liftable fire alarm according to claim 7, characterised in that: in the axial direction of reel (34), hall inductor is located one side of reel (34), magnet (4) are installed one end and the eccentric settings that are close to hall inductor of reel (34).

9. A liftable fire alarm according to claim 4, characterised in that: still include contact switch (125), contact switch (125) are installed the top of alarm body (1) and with first controller (U1) are connected, and mount pad (2) are installed when on the top of alarm body (1), the bottom of mount pad (2) with contact switch (125) butt, contact switch (125) are closed, first controller (U1) are closed driving motor (33).

10. A liftable fire alarm according to claim 4, characterised in that: still include manual switch (126), manual switch (126) are installed the lateral part of alarm body (1) and with first controller (U1) are connected, when manual switch (126) are closed, first controller (U1) are opened driving motor (33) and control driving motor (33) drive reel (34) are right the conveyer belt is taken up.