CN219157464U - Construction warning device - Google Patents

Abstract

The utility model discloses a construction warning device, which comprises a warning shell; the bottom plate is fixed on the ground through a fastener; the alarm assembly comprises a power supply and a loudspeaker which is connected with the alarm shell through an elastic telescopic piece and is detachably connected with the bottom plate, the power supply and the loudspeaker are combined to form an alarm circuit, two end positions of a loudspeaker motion path are an alarm position and a separation position respectively, the loudspeaker is separated from the bottom plate and is communicated with the alarm circuit, and the loudspeaker is connected with the bottom plate and is disconnected from the alarm circuit. This construction warning device breaks away from ground after receiving the striking and makes the speaker break away from the bottom plate, removes to alarm position through the extensible member for the power supply is supplied power to the speaker after alarm circuit switches on, makes the speaker keep the sound production of high decibel for a long time in order to remind constructor to notice safety, and the device can repetitious usage, has avoided the cost increase that disposable caused.

Description

Construction warning device

Technical Field

The utility model relates to the technical field of road construction warning, in particular to a construction warning device.

Background

When the maintenance construction is carried out on the road, warning devices such as roadblocks and the like are placed at positions far away from the construction and used for guiding and warning traffic flow to remind that the road in front is being constructed.

Because traditional roadblock function is single, only possess the effect of guide and warning, and do not have alarming function, when there is the unexpected open roadblock that bumps into of vehicle to the job site, can not in time remind constructor dangerous situation, therefore, chinese patent application document of application number CN202210923413.1 discloses a high-speed maintenance construction warning device, after this warning device is bumped to the vehicle, the toper section of thick bamboo is pressed and is out of shape, the spacing to rotary mechanism has been cancelled, make the bull stick rotate at a high speed under the wind spring effect, when driving the hammer that bumps and rotate, the hammer that bumps and bumps the piece, produce high decibel sound and report to the police, thereby remind constructor in order to protect self personal safety.

However, the warning device must ensure that the inner cavity of the conical cylinder is isolated from the outside and no air leakage occurs, and when the conical cylinder is impacted, the conical cylinder is always deformed and broken, so that after the inner cavity is communicated with the outside, the sealing plug cannot be extruded, and further, the rotating rod cannot drive the knocking hammer to rotate to collide with the knocking block, and smooth sounding and warning of constructors cannot be ensured; secondly, even if the conical cylinder is deformed and the inner cavity is always isolated from the outside, after the alarm is carried out, the device is damaged due to the serious deformation of the conical cylinder, namely the alarm device is a disposable alarm device which cannot be used repeatedly after the alarm is carried out once, and the structure of the device is complex, so that the use cost of the alarm device is further increased; in addition, as the number of times that the knocking hammer collides with the knocking block increases, the collision force of the knocking hammer on the knocking block is reduced, the sent alarm sound decibel is gradually reduced along with the increase of the knocking number, and finally the knocking block stops colliding with the knocking block, so that the device cannot realize continuous high-intensity sounding alarm, and the alarm effect is extremely limited.

Therefore, there is a need for an improvement in the construction warning devices of the prior art.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the construction warning device which can be repeatedly used for a plurality of times to reduce the cost, ensure that constructors can be smoothly warned by sounding prompts and avoid the reduction of the warning sound intensity.

In order to achieve the technical effects, the technical scheme of the utility model is as follows: a construction warning device, comprising:

the warning shell is placed on the ground to form a cavity with the ground in a surrounding mode;

the bottom plate is fixed on the ground through a fastener;

the alarm assembly is arranged in the cavity, the alarm assembly comprises a power supply fixedly connected with the alarm shell and a loudspeaker connected with the alarm shell through an elastic telescopic piece and detachably connected with the bottom plate, the loudspeaker slides in the cavity along the telescopic direction of the telescopic piece, the power supply and the loudspeaker are combined to form an alarm circuit, two end positions of a loudspeaker movement path are respectively an alarm position and a separation position, the alarm position is lower than the alarm position, the bottom plate is separated, the alarm circuit is conducted, and the loudspeaker is connected with the bottom plate and is disconnected from the alarm circuit.

Preferably, in order to realize detachable connection of the speaker and the bottom plate, the speaker is connected with the bottom plate through a clamping block and a clamping jaw which are matched with each other in a clamping way, and the clamping jaw is provided with a clamping opening matched with the clamping block.

Preferably, in order to realize the detachable connection between the speaker and the bottom plate, the speaker is connected with the bottom plate through a magnetic attraction piece, and the magnetic attraction piece is a magnet which is connected with the speaker and attracts the bottom plate mutually; or the magnetic attraction piece comprises two magnets with magnetic attraction, and the two magnets are respectively connected with the bottom plate and the loudspeaker.

Preferably, in order to facilitate the installation of the alarm assembly, the alarm shell comprises an upper shell and a lower shell which are detachably connected, the upper shell is arranged above the lower shell, and the alarm assembly is connected with the upper shell or the lower shell.

Preferably, in order to facilitate the quick detachable connection between the upper shell and the lower shell, the upper shell is connected with the lower shell through a clamping hook and a clamping interface which are matched in a clamping manner.

Preferably, in order to realize the joint cooperation of pothook and interface, guarantee the joint strength of last casing and lower casing, the bottom of going up the casing is provided with the laminating board, the top of casing is provided with down the laminating board down, go up the laminating board with down the laminating board is laminated mutually, the pothook with one of interface set up in on the laminating board, another set up in on the laminating board down.

Preferably, in order to conveniently adjust the height position of the power supply to adjust the deformation degree of the telescopic member, the upper shell or the lower shell is provided with a threaded pipe extending along the vertical direction, the alarm assembly comprises an adjusting plate in threaded connection with the inner wall of the threaded pipe, and the power supply is fixed on the adjusting plate.

Preferably, in order to enable the speaker to be capable of respectively realizing the connection and disconnection of the alarm circuit at the alarm position and the separation position, electrode plates are fixed at two ends of the power supply, the speaker is fixed with guide rods corresponding to the electrode plates at two ends of the power supply one by one, the guide rods extend along the vertical direction, guide sleeves are arranged on the adjusting plate, the guide rods are in sliding fit with the guide sleeves, the guide rods are conductive rods, and the guide rods are abutted to the electrode plates and are electrically connected at the alarm position.

Preferably, in order to conveniently connect the loudspeaker and the warning shell, the loudspeaker can be conveniently moved through the telescopic piece after being disconnected with the bottom plate, so as to realize the electric connection between the loudspeaker and the power supply, the telescopic piece is a spring, and the telescopic direction of the spring is parallel to the plumb direction and the spring is in a stretching state.

Preferably, in order to give consideration to the light weight and the structural strength of the warning shell, the warning shell is convenient to recover the original shape through elastic deformation after being slightly collided, the service life of the warning shell is prolonged, and the warning shell is an SMC warning shell.

In summary, compared with the prior art, the construction warning device has the advantages that the warning shell is separated from the ground after being impacted, so that the loudspeaker is separated from the bottom plate, the telescopic piece moves to the warning position, the power supply supplies power to the loudspeaker after the warning circuit is conducted, the loudspeaker keeps sounding of high decibel for a long time to prompt constructors to pay attention to safety, the device can be repeatedly used for many times, and the cost increase caused by disposable use is avoided.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is an exploded view of the other view of FIG. 1;

FIG. 4 is a top view of FIG. 1;

FIG. 5 is a cross-sectional view taken along the direction A-A of FIG. 4;

FIG. 6 is a schematic structural view of an alarm assembly according to a first embodiment of the present utility model;

FIG. 7 is an exploded view of FIG. 6;

fig. 8 is a schematic structural view of a second embodiment of the present utility model;

FIG. 9 is an exploded view of FIG. 8;

in the figure: 100. a warning shell; 200. a bottom plate; 300. a fastener; 400. a power supply; 401. an electrode plate; 402. a battery case; 403. a box cover; 404. a dry cell; 405. a screw; 500. a telescoping member; 600. a speaker; 700. a clamping block; 800. a claw; 900. a magnetic attraction piece; 110. an upper housing; 111. a clamping hook; 112. mounting a bonding plate; 120. a lower housing; 121. a card interface; 122. a lower bonding plate; 123. flanging; 130. a threaded tube; 140. an adjusting plate; 150. a guide rod; 160. guide sleeve; 170. a connecting rod; 171. a protruding cover; 180. a collar; 190. and (3) a bracket.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

As shown in fig. 1 to 7, the construction warning device according to the first embodiment of the present utility model is mainly placed at the front section of a construction road, and is used for guiding traffic flow, prompting the construction of the road ahead, and warning by sounding after being impacted, so as to prompt the constructors on the construction road section to pay attention to personal safety.

The construction warning device of this embodiment includes:

the warning shell 100 is placed on the ground to form a cavity with the ground in a surrounding manner;

a base plate 200, the base plate 200 being fixed to the ground by a fastener 300;

the alarm assembly is arranged in the cavity and comprises a power supply 400 fixedly connected with the alarm shell 100 and a loudspeaker 600 connected with the alarm shell 100 and detachably connected with the bottom plate 200 through an elastic telescopic piece 500, the loudspeaker 600 slides in the cavity along the telescopic direction of the telescopic piece 500, the power supply 400 and the loudspeaker 600 are combined to form an alarm circuit, two end positions of a movement path of the loudspeaker 600 are respectively an alarm position and a separation position, the loudspeaker 600 is separated from the bottom plate 200 and the alarm circuit is conducted at the alarm position, and the loudspeaker 600 is connected with the bottom plate 200 and the alarm circuit is disconnected at the separation position.

Specifically, the overall shape of the warning shell 100 is similar to the shape of a roadblock in the prior art, is a conical column, is placed on the ground, and prompts and alarms vehicles passing near a construction road section and workers passing the construction road section; the bottom plate 200 is located inside the warning shell 100, the bottom plate 200 is a square plate, four corners of the square plate are fixedly connected with the ground through four fasteners 300, the fasteners 300 are fixing bolts, namely, the fixing bolts penetrate through the bottom plate 200 to fix the bottom plate 200 on the ground, and of course, the fasteners 300 are not limited to the above structure, for example, the fasteners 300 can also adopt structural adhesives, and the bottom plate 200 is fixed on the ground through the structural adhesives.

The alarm assembly is arranged in a cavity formed by enclosing the alarm shell 100 and the ground, when the alarm shell 100 is not impacted and collided, the loudspeaker 600 in the alarm assembly is positioned at a separation position, the loudspeaker 600 is connected with the bottom plate 200, an alarm circuit formed by the loudspeaker 600 and the power supply 400 is disconnected, namely, the power supply 400 cannot supply power to the loudspeaker 600 at the moment, the loudspeaker 600 is idle, and the elastic telescopic piece 500 is elastically deformed; when the warning shell 100 is impacted by a vehicle, the speaker 600 is separated from the bottom plate 200, the telescopic member 500 is in a shape before recovery, the speaker 600 is driven to be adjusted to an alarm position, and an alarm circuit formed by the speaker 600 and the power supply 400 is conducted at the alarm position, and the power supply 400 supplies power to the speaker 600 at the moment, so that the speaker 600 sounds to alarm, and the personnel on a construction road section are reminded of paying attention to personal safety, and meanwhile, the pedestrians and the vehicles in the past are reminded of paying attention to self safety.

Compared with the construction warning device in the prior art, after the device is impacted, the warning shell 100 is separated from the ground, so that the loudspeaker 600 is separated from the bottom plate 200 to move to the warning position, after the loudspeaker 600 is electrically connected with the power supply 400, the loudspeaker 600 can smoothly make sound to prompt surrounding constructors and passing vehicles, and meanwhile, the loudspeaker 600 can keep high-decibel sounding for a long time, so that a long-term stable warning effect is achieved; moreover, the device can repeatedly use after once warning use, only need when using, fix the subaerial back with bottom plate 200 through fastener 300, adjust speaker 600 to the separation position for when alarm circuit breaks off, speaker 600 is connected with bottom plate 200, and then the device can repeatedly use once more, has avoided disposable use to cause the use cost increase of device.

A further improvement is that speaker 600 is connected to base 200 by a snap fit latch 700 and a pawl 800, pawl 800 having a bayonet fitting latch 700. Specifically, as shown in fig. 2, 3 and 5-7, the clamping block 700 is integrally formed on the top surface of the bottom plate 200, the clamping block 700 is in a strip shape, the cross section of the circumferential outer edge of the clamping block 700 is in a major arc shape on one side far away from the bottom plate 200, the cross section of the inner wall of the clamping opening of the clamping jaw 800 is in a major arc shape, the clamping opening is clamped with the clamping block 700, the clamping jaw 800 is fixedly connected with the connecting rod 170, and the top of the connecting rod 170 is connected with the loudspeaker 600.

When the device is used, after the bottom plate 200 is fixed on the ground through the fastener 300, the clamping jaw 800 is pulled by the connecting rod 170 to be clamped with the clamping block 700 on the bottom plate 200, meanwhile, the bottom surface of the warning shell 100 is attached to the ground, the loudspeaker 600 is located at the separation position and is disconnected with the power supply 400, after the warning shell 100 is impacted by external impact, the warning shell 100 is separated from the ground, the clamping jaw 800 is separated from the clamping block 700 and is influenced by the action of the telescopic piece 500, the loudspeaker 600 is enabled to move to the alarm position, at the moment, the loudspeaker 600 is electrically connected with the power supply 400, the power supply 400 supplies power to the loudspeaker 600, so that the loudspeaker 600 can sound, and alarm prompts are given to other passing vehicles and construction people on construction sections.

Further improved is that the warning case 100 comprises an upper case 110 and a lower case 120 which are detachably connected, the upper case 110 is disposed above the lower case 120, and the warning unit is connected with the upper case 110 or the lower case 120.

Specifically, the warning shell 100 includes an upper shell 110 and a lower shell 120, where the upper shell 110 is in a conical cover shape, the lower shell 120 is in a conical frustum shape, and a flange 123 extending outwards is provided at the bottom of the lower shell 120, so as to increase the contact area between the warning shell 100 and the ground, and facilitate the stable placement of the warning shell 100; the bottom of the upper shell 110 is provided with an annular upper bonding plate 112, the bottom surface of the upper bonding plate 112 is fixed with two downward clamping hooks 111, the top of the lower shell 120 is provided with an annular lower bonding plate 122, the lower bonding plate 122 is fixed with two through-hole-shaped clamping interfaces 121, and the clamping interfaces 121 are in one-to-one correspondence and are in clamping fit with the clamping hooks 111; the alarm assembly is located inside the upper and lower bonding plates 112 and 122 and is connected to the upper housing 110.

After adopting above-mentioned structure, divide into the warning shell 100 and go up casing 110 and lower casing 120 two parts, when the device is assembled, at first with alarm subassembly dress on last casing 110 for alarm subassembly wears to locate the inboard of going up laminating board 112, then with last casing 110 with lower casing 120 alignment back, be close to each other with the two, make the pothook 111 gib head of going up laminating board 112 pass the joint mouth 121 of lower laminating board 122, with the joint cooperation that realizes pothook 111 and joint mouth 121, go up laminating board 112 and lower laminating board 122 each other laminating and coaxial line this moment, so, assemble last casing 110 and lower casing 120 and form warning shell 100.

Further improvement is that a threaded pipe 130 extending along the vertical direction is arranged on the upper shell 110 or the lower shell 120, the alarm assembly comprises an adjusting plate 140 in threaded connection with the inner wall of the threaded pipe 130, and a power supply 400 is fixed on the adjusting plate 140; electrode plates 401 are fixedly arranged at both ends of the power supply 400, guide rods 150 which are in one-to-one correspondence with the electrode plates 401 at both ends of the power supply 400 are fixedly arranged on the loudspeaker 600, the guide rods 150 extend along the vertical direction, guide sleeves 160 are arranged on the adjusting plate 140, the guide rods 150 are in sliding fit with the guide sleeves 160, the guide rods 150 are conductive rods, and the guide rods 150 are in butt joint with the electrode plates 401 and are electrically connected at the alarm position; the expansion member 500 is a spring, and the expansion direction of the spring is parallel to the vertical direction.

Specifically, the top surface integrated into one piece on the upper laminating plate 112 has the screwed pipe 130 the same with its coaxial line and internal diameter, and screwed pipe 130 extends along the top in the upper laminating plate 112 axial line upwards casing 110, and the circumference inner wall threaded connection of screwed pipe 130 has regulating plate 140, and power 400 is fixed in the top of regulating plate 140, and speaker 600 is located the below of regulating plate 140, and speaker 600 passes through extensible member 500 and is connected with regulating plate 140, and extensible member 500 is the spring, and the spring is in tensile state, and the direction of extension of spring is parallel to screwed pipe 130's axial lead direction.

After the structure is adopted, after the bottom plate 200 is fixed on the ground, the clamping jaw 800 is pulled, the clamping jaw 800 is clamped on the clamping block 700, the spring is in a stretching state and generates elastic force as a telescopic piece 500, the elastic force acts on the adjusting plate 140, the adjusting plate 140 is in threaded connection with the threaded pipe 130, the threaded pipe 130 is fixed on the upper attaching plate 112, the spring generates downward tension on the warning shell 100 formed by the upper shell 110 and the lower shell 120, therefore, before the warning shell 100 is not collided, the warning shell 100 is abutted against the ground through the spring, thereby ensuring that the warning shell 100 is firmly placed, preventing the warning shell 100 from being blown by external wind and separating from the ground, ensuring that the warning shell 100 and the ground have certain connection strength, and compared with the traditional method, which is used for fixing weights on the warning shell 100 to increase the pressure of the warning shell 100 and the ground, the method is free of adding weights and convenient to operate.

A convex cover 171 is fixed at one end of the connecting rod 170 adjacent to the speaker 600, a collar 180 is arranged at the outer sealing sleeve of the connecting rod 170, and the collar 180 is fixedly connected with the speaker 600 through a bracket 190.

After adopting the structure, utilize protruding lid 171 to prevent that connecting rod 170 from breaking away from lantern ring 180, locate outside connecting rod 170 through lantern ring 180 cover for jack catch 800 rotates for speaker 600 and connects, the rotation axial lead is unanimous with connecting rod 170 axial lead, and through adjusting plate 140 threaded connection in the inner wall of screwed pipe 130, through the position of control adjusting plate 140 in screwed pipe 130, thereby can adjust the tensile length of jack catch 800 and fixture block 700 connection back spring expansion piece 500, avoid expansion piece 500 tensile effort too little, result in warning shell 100 to receive the collision to break away from ground after, expansion piece 500 is difficult to drive speaker 600 and adjusts to alarm position, avoided expansion piece 500 tensile effort too big simultaneously, result in drawing jack catch 800 to break away from fixture block 700 easily, namely through adjusting plate 140's position, the tensile deformation volume of spring expansion piece 500, make warning shell 100 can guarantee the connection of jack catch 800 and fixture block 700 before receiving the impact collision, guarantee simultaneously warning shell 100 after receiving the impact collision, can drive speaker 600 and remove to alarm position.

The specific structure of the power supply 400 is shown in the figure, the power supply 400 comprises a battery box 402 fixed above an adjusting plate 140, two dry batteries 404 connected in series are arranged in the battery box 402, a box cover 403 is arranged on the top cover of the battery box 402, four corners of the box cover 403 are fixedly connected with the battery box 402 through screws 405, two electrode plates 401 are fixed at two ends of the battery box 402, and the two electrode plates 401 are respectively connected with the anode and the cathode of a battery formed by connecting the two dry batteries 404 in series; two guide sleeves 160 are fixed on the adjusting plate 140, the guide sleeves 160 correspond to the electrode plates 401 one by one, an axial lead extension line of each guide sleeve 160 is intersected with each electrode plate 401, guide rods 150 are sealed and attached in the two guide sleeves 160, the bottom ends of the guide rods 150 are electrically connected with the loudspeaker 600, the guide rods 150 slide on the inner sides of the guide sleeves 160, and a sliding path at the top ends of the guide rods 150 is intersected with the electrode plates 401.

After the structure is adopted, before the warning shell 100 is not impacted, the clamping jaw 800 is clamped on the clamping block 700, the spring is stretched, the loudspeaker 600 is positioned at the separation position, and the guide rod 150 and the electrode plate 401; after the warning shell 100 is impacted, the warning shell 100 is separated from the bottom surface, so that the clamping jaw 800 is separated from the clamping block 700, the spring telescopic piece 500 is deformed in a recovery mode, the loudspeaker 600 is pulled to move towards the warning position, namely, the loudspeaker 600 moves towards the adjusting plate 140, the loudspeaker 600 drives the guide rod 150 to slide along the guide sleeve 160, the guide rod 150 finally contacts with the electrode plate 401, at the moment, the loudspeaker 600 is positioned at the warning position, two stages of the loudspeaker 600 are electrically connected with batteries formed by the guide rod 150 and the electrode plate 401 and the two dry batteries 404 respectively, at the moment, the warning circuit is conducted, and then the loudspeaker 600 can sound for warning, so that constructors and passing vehicles are reminded of self safety.

A further improvement is that the warning case 100 is an SMC warning case 100. Namely, the warning shell 100 is made of SMC materials, so that the warning shell 100 has elasticity with certain structural strength, is light in weight, is convenient to carry and transport, enhances the impact resistance of the warning shell 100, and can recover to an initial shape according to the elasticity of the warning shell 100 after being slightly collided or extruded to generate deformation, thereby avoiding pits from being formed on the appearance of the warning shell 100, and ensuring the appearance effect and the service life of the warning shell 100; in addition, the warning shell 100 is easy to repair and maintain, and after local damage occurs, the damaged part can be repaired through glass fiber and resin, so that the service life of the warning shell is prolonged, and the use cost increase caused by too short use period is avoided.

As shown in fig. 8 and 9, the construction warning device according to the second embodiment of the present utility model is different from the first embodiment in that the speaker 600 and the base 200 are connected by the magnetic attraction member 900, and the magnetic attraction member 900 is a magnet connected to the speaker 600 and attracted to the base 200.

Specifically, the magnetic attraction member 900 is a magnet, and is fixedly connected with the speaker 600 through the connecting rod 170, and the base plate 200 is an iron plate, so that the base plate 200 and the magnetic attraction member 900 are attracted to each other. When the warning shell 100 is not impacted, the magnetic attraction piece 900 is adsorbed on the bottom plate 200, so that the spring expansion piece 500 is stretched, the warning shell 100 is separated from the ground after being impacted by external impact, the magnetic attraction piece 900 is driven to forcibly separate from the bottom plate 200, and the spring expansion piece 500 drives the loudspeaker 600 to move to an alarm position, so that an alarm circuit is conducted, and the loudspeaker 600 sounds to alarm.

Based on the above principle, the magnetic attraction member 900 may also be formed by two magnets that attract each other magnetically, where one magnet is fixedly connected to the speaker 600, and the other magnet is fixedly connected to the base plate 200, which can achieve the above technical effects as well.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (10)

1. A construction warning device, comprising:

the warning shell (100) is placed on the ground to form a cavity with the ground in a surrounding mode;

-a base plate (200), said base plate (200) being secured to the ground by means of fasteners (300);

the alarm assembly is arranged in the cavity, the alarm assembly comprises a power supply (400) fixedly connected with the alarm shell (100) and a loudspeaker (600) detachably connected with the alarm shell (100) through an elastic telescopic piece (500), the loudspeaker (600) slides in the cavity along the telescopic direction of the telescopic piece (500), the power supply (400) and the loudspeaker (600) are combined to form an alarm circuit, the two end positions of the movement path of the loudspeaker (600) are respectively an alarm position and a separation position, the alarm position is divided from the bottom plate (200) and communicated with the alarm circuit, and the loudspeaker (600) is connected with the bottom plate (200) and disconnected with the alarm circuit.

2. The construction warning device according to claim 1, characterized in that: the loudspeaker (600) is connected with the bottom plate (200) through a clamping block (700) and a clamping jaw (800) which are matched in a clamping way, and the clamping jaw (800) is provided with a clamping opening matched with the clamping block (700).

3. The construction warning device according to claim 1, characterized in that: the loudspeaker (600) is connected with the bottom plate (200) through a magnetic attraction piece (900), and the magnetic attraction piece (900) is a magnet which is connected with the loudspeaker (600) and attracts with the bottom plate (200) mutually; or the magnetic attraction piece (900) comprises two magnets which attract each other magnetically, and the two magnets are respectively connected with the bottom plate (200) and the loudspeaker (600).

4. The construction warning device according to claim 1, characterized in that: the warning shell (100) comprises an upper shell (110) and a lower shell (120) which are detachably connected, the upper shell (110) is arranged above the lower shell (120), and the warning component is connected with the upper shell (110) or the lower shell (120).

5. The construction warning device according to claim 4, wherein: the upper shell (110) and the lower shell (120) are connected with a clamping interface (121) through clamping hooks (111) matched in a clamping way.

6. The construction warning device according to claim 5, wherein: the bottom of going up casing (110) is provided with laminating board (112), the top of casing (120) is provided with down laminating board (122), go up laminating board (112) with laminating down laminating board (122) mutually, pothook (111) with one of clamping interface (121) set up in go up laminating board (112) on, another set up in down on laminating board (122).

7. The construction warning device according to claim 4, wherein: the alarm device is characterized in that a threaded pipe (130) extending in the vertical direction is arranged on the upper shell (110) or the lower shell (120), the alarm assembly comprises an adjusting plate (140) in threaded connection with the inner wall of the threaded pipe (130), and the power supply (400) is fixed on the adjusting plate (140).

8. The construction warning device according to claim 7, characterized in that: electrode plates (401) are fixed at two ends of the power supply (400), guide rods (150) corresponding to the electrode plates (401) at two ends of the power supply (400) one by one are fixed on the loudspeaker (600), the guide rods (150) extend along the vertical direction, guide sleeves (160) are arranged on the adjusting plates (140), the guide rods (150) are in sliding fit with the guide sleeves (160), the guide rods (150) are conductive rods, and the guide rods (150) are in butt joint with the electrode plates (401) and are electrically connected at the alarming positions.

9. The construction warning device according to claim 7, characterized in that: the telescopic piece (500) is a spring, the telescopic direction of the spring is parallel to the vertical direction, and the spring is in a stretching state.

10. The construction warning device according to claim 1, characterized in that: the warning shell (100) is an SMC warning shell (100).

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