Sound production device for accident emergency rescue and safety helmet

Abstract

The utility model relates to a sounding device for accident emergency rescue, which comprises a supporting column with a hollow structure and a sliding rod embedded in the supporting column, and the middle part of the sliding rod is in sliding fit with the inner side wall of the supporting column along the length direction of the sliding rod; an elastic piece perpendicular to the sliding rod is arranged on the inner wall of the supporting column, and one end of the elastic piece is located on the movement track of the sliding rod. A driving part used for driving the sliding rod to slide on the supporting column in a reciprocating mode is arranged between the sliding rod and the supporting column. The safety helmet comprises the sound production device for accident emergency rescue and a safety helmet body, and one end of the supporting column is detachably connected with the top face of the safety helmet. The problems that in the prior art, buried personnel need to shout continuously, sound signals are transmitted to the ground continuously, physical strength is consumed quickly, and rescue work cannot be carried out smoothly are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to emergency rescue technical field, concretely relates to a sound production device for emergency rescue of accident and safety helmet. BACKGROUND

[0002] Mine collapse refers to the accident that coal mine roadway or mine roof, coal pillar and other parts suddenly collapse due to coal seam instability, which is a serious mine disaster, and often causes serious casualties and property losses. In mine collapse accidents, due to the too fast speed of roadway collapse, the underground staff is difficult to escape and is buried underground, so the rescue of the buried staff is very important after the mine collapse accident.

[0003] In the prior art, the sound detector is one of the commonly used devices for search and rescue work, which uses low-frequency ultrasonic wavelength reflection principle and can sensitively capture sound signals such as faint cries and weak knocks of trapped personnel through omnidirectional sound probe detection to locate the buried personnel. Therefore, the buried personnel usually use shouting to transmit information to the ground search personnel, so that the search personnel can quickly locate and carry out search and rescue work.

[0004] However, the rescue work usually needs to continuously locate the buried personnel to make the rescue more accurate, and the buried personnel need to continuously shout and continuously transmit sound signals to the ground, which quickly consumes physical strength and is not conducive to the smooth development of the rescue work. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims to provide a sound production device for emergency rescue of accident and safety helmet to solve the problem that the buried personnel need to continuously shout and continuously transmit sound signals to the ground in the prior art, which quickly consumes physical strength and is not conducive to the smooth development of the rescue work.

[0006] The utility model realizes the following technical scheme:

[0007] A sound production device for emergency rescue of accident, comprising a support column in a hollow structure and a sliding rod embedded in the support column, the middle part of the sliding rod is in sliding cooperation with the inner side wall of the support column along the length direction of the sliding rod;

[0008] The inner wall of the support column is provided with an elastic sheet perpendicular to the sliding rod, and one end of the elastic sheet is located on the motion track of the sliding rod;

[0009] The driving part for driving the sliding rod to reciprocally slide in the support column is arranged between the sliding rod and the support column.

[0010] Further, one end of the elastic sheet away from the sliding rod penetrates the side wall of the support column and extends out of the support column, and the middle part of the elastic sheet is tightly fitted with the side wall of the support column.

[0011] Further, the driving part comprises a rotating disc embedded in one end of the supporting column, the rotating disc is rotationally connected with the supporting column with the rotating disc axis as the rotation center line, and the rotating disc axis is perpendicular to the slide rod;

[0012] The slide rod is provided with a strip-shaped hole extending in the width direction of the slide rod, and the length direction of the strip-shaped hole is parallel to the rotating disc;

[0013] A cylindrical column is arranged on the upper edge of the plane of the rotating disc facing the slide rod, one end of the cylindrical column is fixedly connected with the rotating disc, the other end extends axially towards the rotating disc and is inserted into the strip-shaped hole, and the outer cylindrical surface of the cylindrical column is attached to the two side walls of the strip-shaped hole along the length direction of the slide rod.

[0014] Further, a rotating rod coaxial with the rotating disc is arranged on the plane of the rotating disc away from the slide rod, one end of the rotating rod is fixedly connected with the rotating disc, the other end penetrates through the side wall of the supporting column and extends out of the supporting column, and the rotating rod is rotationally matched with the side wall of the supporting column.

[0015] Further, a handle is arranged on the end of the rotating rod away from the rotating disc, the handle is in the shape of a polygonal prism, and one end of the handle is fixedly connected with the rotating rod.

[0016] Further, a coil spring coaxial with the rotating disc is arranged on the plane of the rotating disc away from the slide rod, the inner end of the coil spring is fixedly connected with the rotating disc, and the outer end is fixedly connected with the inner wall of the supporting column.

[0017] Further, a plurality of grooves are arranged on the outer cylindrical surface of the rotating disc and are uniformly distributed along the circumferential direction of the rotating disc, and a slide hole is arranged on the outer side wall of the supporting column and communicates between the inner and outer sides of the supporting column.

[0018] A limiting block is arranged in the slide hole, one end of the limiting block is slidingly matched with the slide hole, and the other end is inserted into one of the grooves.

[0019] Further, the end of the limiting block facing the rotating disc is in the shape of a wedge, and the groove is matched with the wedge-shaped end of the limiting block.

[0020] A spring is arranged on the end of the limiting block away from the rotating disc, one end of the spring is fixedly connected with the limiting block, the other end is connected with the side wall of the slide hole, and when the spring is naturally stretched, the inclined surface of the wedge-shaped end of the limiting block is attached to the inclined surface of the groove.

[0021] Further, an adjusting rod is arranged in the end of the slide hole away from the rotating disc, the middle part of the adjusting rod is connected with the side wall of the end of the slide hole away from the rotating disc through thread cooperation;

[0022] One end of the adjusting rod is inserted into the limiting block and is rotationally matched with the limiting block around the adjusting rod axis, and the other end protrudes out of the slide hole;

[0023] The spring is embedded in the limiting block and coaxial with the adjusting rod, one end of the spring abuts against one end of the adjusting rod facing the limiting block, and the other end abuts against the limiting block.

[0024] A safety helmet comprises the sound device for emergency rescue in accidents and a safety helmet body, and one end of the supporting column is detachably connected with the top surface of the safety helmet.

[0025] The utility model discloses beneficial effect lies in:

[0026] The sound device for emergency rescue in accidents, by setting up the slide bar in the supporting column, and the slide bar and the supporting column slide fit, utilize the slide bar sliding to push the elastic sheet deformation bending, after the slide bar is separated from the contact with the elastic sheet, the elastic sheet releases energy and swings rapidly, and then sound is emitted, instead of the shouting of the buried personnel to transmit the sound signal to the ground, and simultaneously, through the driving part drives the slide bar to reciprocating slide in the supporting column, makes the slide bar to dial the elastic sheet back and forth twice, makes the elastic sheet swing twice to emit sound, and with the continuous reciprocating slide of the slide bar, makes the intermittent swing of the elastic sheet, continuously transmits the sound signal to the ground, slows down the physical consumption speed of the buried personnel, so as to facilitate the smooth development of the rescue work.

[0027] The safety helmet, by installing the sound device on the safety helmet, only needs to wear the safety helmet body, can carry the sound device, provides the convenience for the relevant technical personnel, and simultaneously, the sound device can be detached from the safety helmet body, so as to facilitate the maintenance and replacement of the sound device, improves the practicality of the safety helmet.

[0028] The other advantages, objects and features of the utility model will be set forth in the subsequent description to some extent, and to some extent, it will be obvious to those skilled in the art based on the study of the following text or can be taught from the practice of the utility model. The objects and other advantages of the utility model can be realized and obtained by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the three-dimensional structure schematic diagram of the utility model embodiment;

[0030] Figure 2 It is the explosion drawing of the utility model embodiment;

[0031] Figure 3 It is the three-dimensional structure schematic diagram of the sound device in the utility model embodiment;

[0032] Figure 4 It is the plane structure schematic diagram of the sound device in the utility model embodiment;

[0033] Figure 5 It is the three-dimensional structure schematic diagram of the slide bar in the utility model embodiment;

[0034] Figure 6 It is the three-dimensional structure schematic view of the turntable in the embodiment of the utility model;

[0035] Figure 7 It is the three-dimensional structure schematic view of the adjusting rod and the limiting block in the embodiment of the utility model;

[0036] Figure 8 Position Figure 4 The cross-sectional view of A-A.

[0037] In the figure: 1, support column; 11, sliding hole; 12, limiting block; 121, concave cavity; 13, spring; 14, adjusting rod; 2, sliding rod; 21, strip-shaped hole; 3, turntable; 31, cylinder; 32, rotating rod; 33, handle; 34, coil spring; 35, groove; 4, safety helmet main body; 41, adhesive tape. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiment of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0040] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0041] In the above description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "one side", "the other side" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0042] Moreover, the term "same" and the like terms do not mean that the components must be absolutely the same, but there can be slight differences. The term "vertical" merely means that the positional relationship between the components is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly inclined.

[0043] Please refer to Figures 1-8 The utility model provides a technical scheme: a sounding device for emergency rescue of accidents, including support column 1 of hollow structure and embedded support column 1 in slide bar 2, the middle part of slide bar 2 and the inner wall of support column 1 are along the length direction of slide bar 2 sliding fit;

[0044] The inner wall of support column 1 is provided with elastic sheet 15 perpendicular to slide bar 2, and one end of elastic sheet 15 is located on the motion track of slide bar 2.

[0045] The drive part is arranged between the slide bar 2 and the support column 1 to drive the slide bar 2 to reciprocate in the support column 1.

[0046] In the scheme, the elastic sheet 15 is made of metal material, the metal has good resonance performance, and the metal particles can vibrate rapidly when knocking or vibrating, forming sound waves and producing loud sound. The sounding principle of the sounding device is similar to that of the bicycle bell. When the cyclist presses the lever of the bell, the lever will push the hard object (such as bell hammer or spring 13 hammer) inside the bell to hit the metal sheet. This impact causes the metal sheet to vibrate, and the vibrating metal sheet will also vibrate the air molecules inside the bell, thereby producing sound. The elastic sheet 15 is similar to the metal sheet in the bicycle bell, which vibrates by swinging back and forth, thereby emitting sound.

[0047] By arranging the slide bar 2 in the support column 1 and slidingly fitting the slide bar 2 with the support column 1, the slide bar 2 is used to push the elastic sheet 15 to deform and bend, and after the slide bar 2 is separated from the elastic sheet 15, the elastic sheet 15 releases energy and swings rapidly, thereby emitting sound, replacing the shouting of the buried person to transmit sound signals to the ground. At the same time, the drive part drives the slide bar 2 to reciprocate in the support column 1, so that the slide bar 2 moves the elastic sheet 15 back and forth twice, making the elastic sheet 15 swing twice to emit sound. With the continuous reciprocating sliding of the slide bar 2, the elastic sheet 15 swings intermittently, continuously transmitting sound signals to the ground, slowing down the physical consumption speed of the buried person, so as to facilitate the smooth development of rescue work.

[0048] In the embodiment, the end of the elastic sheet 15 away from the slide bar 2 penetrates the side wall of the support column 1 and extends out of the support column 1, and the middle part of the elastic sheet 15 is tightly fitted with the side wall of the support column 1.

[0049] In the scheme, the elastic sheet 15 is tightly inserted into the side wall of the support column 1, and the friction between the elastic sheet 15 and the side wall of the support column 1 is used to limit the movement of the elastic sheet 15. At the same time, the buried personnel can adjust the length of the elastic sheet 15 inserted into the support column 1 by pressing into the support column 1 or pulling out of the support column 1, and further adjust the length of the elastic sheet 15 swinging, for the elastic sheet 15, the shorter the length of the elastic sheet 15, the faster the vibration, the higher the frequency, and the higher the pitch. Conversely, the longer the length of the elastic sheet 15, the slower the vibration, the lower the frequency, and the lower the pitch.

[0050] Therefore, by adjusting the length of the elastic sheet 15 swinging, the elastic sheet 15 can emit different pitch sounds, improve the sound recognition, and provide convenience for search and rescue work.

[0051] In the embodiment, the driving part includes a rotating disc 3 embedded in one end of the support column 1, the rotating disc 3 is rotationally connected with the support column 1 with the axis of the rotating disc 3 as the rotation center line, and the axis of the rotating disc 3 is perpendicular to the slide rod 2;

[0052] The slide rod 2 is provided with a strip-shaped hole 21 extending in the width direction of the slide rod 2, and the length direction of the strip-shaped hole 21 is parallel to the rotating disc 3;

[0053] A cylindrical column 31 is arranged on the upper edge of a plane of the rotating disc 3 facing the slide rod 2, one end of the cylindrical column 31 is fixedly connected with the rotating disc 3, the other end extends axially towards the rotating disc 3 and is inserted into the strip-shaped hole 21, and the outer cylindrical surface of the cylindrical column 31 is attached to the two side walls of the strip-shaped hole 21 along the length direction of the slide rod 2.

[0054] In the scheme, the rotating disc 3 cooperates with the strip-shaped hole 21 provided on the slide rod 2 through the connecting cylindrical column 31, and when the rotating disc 3 rotates, the cylindrical column 31 slides in the strip-shaped hole 21 to push the slide rod 2 to slide in the support column 1; a mounting cavity is provided in a section of the support column 1, wherein the rotating disc 3 is located in the mounting cavity, and the slide rod 2 can rotate in the mounting cavity when it slides in the support column 1;

[0055] Further, one end of the elastic sheet 15 extends into the mounting cavity, and the slide rod 2 can push the elastic sheet 15 when it moves, for making the elastic sheet 15 vibrate to emit sound, wherein a protruding part is arranged on the side of the slide rod 2 facing the elastic sheet 15, and the protruding part forms a pushing structure for the end of the elastic sheet 15, that is, the slide rod 2 pushes the elastic sheet 15 to bend through the protruding part during movement, and then the slide rod 2 is separated from the elastic sheet 15, so that the elastic sheet 15 vibrates to emit sound;

[0056] Wherein, the elastic sheet 15 is located on the movement track of the protruding part, that is, the protruding part can completely slide over the elastic sheet 15;

[0057] The side wall of the installation cavity can be communicated with the outside through a through hole, so that the air in the installation cavity and the outside can flow, and the elastic sheet 15 is used to emit sound and transmit the sound outward.

[0058] In this embodiment, the rotating rod 32 is arranged on the rotating disc 3, and one end of the rotating rod 32 penetrates through the side wall of the support column 1 and extends out of the support column 1, so that the buried person can manually rotate the rotating rod 32 to drive the rotating disc 3 to rotate, which is simple and convenient to operate.

[0059] In this embodiment, the rotating rod 32 is arranged on the rotating disc 3, and one end of the rotating rod 32 penetrates through the side wall of the support column 1 and extends out of the support column 1, so that the buried person can manually rotate the rotating rod 32 to drive the rotating disc 3 to rotate, which is simple and convenient to operate.

[0060] In this embodiment, the rotating rod 32 is arranged on the rotating disc 3, and one end of the rotating rod 32 penetrates through the side wall of the support column 1 and extends out of the support column 1, so that the buried person can manually rotate the rotating rod 32 to drive the rotating disc 3 to rotate, which is simple and convenient to operate.

[0061] In this embodiment, the rotating rod 32 is arranged on the rotating disc 3, and one end of the rotating rod 32 penetrates through the side wall of the support column 1 and extends out of the support column 1, so that the buried person can manually rotate the rotating rod 32 to drive the rotating disc 3 to rotate, which is simple and convenient to operate.

[0062] In this embodiment, the rotating rod 32 is arranged on the rotating disc 3, and one end of the rotating rod 32 penetrates through the side wall of the support column 1 and extends out of the support column 1, so that the buried person can manually rotate the rotating rod 32 to drive the rotating disc 3 to rotate, which is simple and convenient to operate.

[0063] In this embodiment, the rotating rod 32 is arranged on the rotating disc 3, and one end of the rotating rod 32 penetrates through the side wall of the support column 1 and extends out of the support column 1, so that the buried person can manually rotate the rotating rod 32 to drive the rotating disc 3 to rotate, which is simple and convenient to operate.

[0064] Specifically, in use, the rotating rod 32 drives the rotating disc 3 to rotate, and then drives the coil spring 34 to contract or expand to store elastic energy, the coil spring 34 releases the elastic energy to reversely drive the rotating disc 3 to rotate, and then the cylindrical rod 31 and the strip-shaped hole 21 are matched to drive the sliding rod 2 to move and act on the elastic sheet 15, so that the elastic sheet 15 emits sound, and the buried person does not need to continuously rotate the handle 33.

[0065] In this embodiment, a plurality of grooves 35 are arranged on the outer circumferential surface of the rotating disc 3 and are uniformly distributed along the circumferential direction of the rotating disc 3, and a sliding hole 11 is arranged on the outer side wall of the support column 1 and communicates between the inside and the outside of the support column 1.

[0066] A limiting block 12 is arranged in the sliding hole 11, one end of the limiting block 12 is in sliding fit with the sliding hole 11, and the other end is inserted into one of the grooves 35.

[0067] In the scheme, the sliding hole 11 extends radially towards the rotating disc 3, and the limiting block 12 protrudes out of the support column 1 at the end away from the rotating disc 3.

[0068] The coil spring 34 is in an elastic energy storage state when installed, and the rotating disc 3 is locked by the limiting block 12, that is, the state of the coil spring 34 is fixed, so that the coil spring 34 remains in an elastic energy storage state;

[0069] When sound operation is needed, the limiting block 12 can be pulled out of the groove 35, that is, the rotating disc 3 is in a free rotating state, which can be pushed and rotated during the elastic energy release of the coil spring 34.

[0070] In the embodiment, the end of the limiting block 12 facing the rotating disc 3 is wedge-shaped, and the groove 35 is adapted to the wedge-shaped end of the limiting block 12;

[0071] The end of the limiting block 12 away from the rotating disc 3 is provided with a spring 13, one end of the spring 13 is fixedly connected with the limiting block 12, and the other end is connected with the side wall of the sliding hole 11, and the wedge-shaped end of the limiting block 12 is in contact with the inclined surface of the groove 35 in the natural extension state of the spring 13.

[0072] In the scheme, the spring 13 is used to elastically support the limiting block 12, and a ratchet and pawl structure is formed by the limiting block 12 and the rotating disc 3, the rotating disc 3 corresponds to the ratchet, the groove 35 corresponds to the tooth groove of the ratchet, and the limiting block 12 corresponds to the pawl, and the locking direction of the above-mentioned ratchet and pawl structure is one-way locking in the direction of pushing the coil spring 34 to store elastic energy;

[0073] Similarly, when sound operation is needed, the limiting block 12 can be pulled out, that is, the rotating disc is in a free rotating state, which can be pushed and rotated during the elastic energy release of the coil spring 34;

[0074] When the elastic energy release of the coil spring 34 is completed, the coil spring 34 can be re-energized by rotating the rotating rod 32.

[0075] Specifically, when the spring 13 is elastically energized and released, the rotating rod 32 is rotated clockwise, and when re-energized, the rotating rod 32 can be rotated counterclockwise.

[0076] In the embodiment, the sliding hole 11 is provided with an adjusting rod 14 at the end away from the rotating disc 3, and the adjusting rod 14 is connected with the side wall of the sliding hole 11 at the end away from the rotating disc 3 through thread cooperation in the middle part;

[0077] One end of the adjusting rod 14 is inserted into the limiting block 12 and rotates around the axis of the adjusting rod 14 in cooperation with the limiting block 12, and the other end protrudes out of the sliding hole 11;

[0078] The spring 13 is embedded in the limiting block 12 and coaxial with the adjusting rod 14, one end of the spring 13 abuts against one end of the adjusting rod 14 facing the limiting block 12, and the other end abuts against the limiting block 12.

[0079] In the scheme, a concave cavity 121 is formed at one end of the limiting block 12 away from the rotating disc 3, the spring 13 is embedded in the concave cavity 121 and one end of the spring 13 abuts against a plane away from the opening of the concave cavity 121, one end of the adjusting rod 14 is inserted into the concave cavity 121 and rotationally matched with the side wall of the concave cavity 121, and the other end of the spring 13 abuts against the adjusting rod 14.

[0080] In use, when the rotating disc 3 needs to be reversely rotated, the adjusting rod 14 is only needed to be reversely rotated, the inner thread on the side wall of the sliding hole 11 applies an axial thrust to the adjusting rod 14, so that the adjusting rod 14 drives the limiting block 12 to slide away from the rotating disc 3 in the sliding hole 11, and the hindrance to the reverse rotation of the rotating disc 3 is eliminated.

[0081] A safety helmet comprises the sound emitting device for emergency rescue in accidents and a safety helmet body 4, and one end of the supporting column 1 is detachably connected with the top surface of the safety helmet.

[0082] In the scheme, one end of the supporting column 1 is adhered to the outer surface of the safety helmet body 4 by using adhesive materials such as glue and adhesive tape 41.

[0083] The safety helmet is one of the commonly used personnel protection devices, and must be worn by mining workers, and the sound emitting device is installed on the safety helmet body 4, so that the sound emitting device can be carried along with the safety helmet body 4, and convenience is provided for relevant technical personnel.

[0084] The sound emitting device is detachably connected with the safety helmet body 4, so that the sound emitting device can be detached for maintenance and replacement, and the practicability of the safety helmet is improved.

[0085] The supporting column 1 is installed on the safety helmet body 4, so that the sound emitting device can emit sound near the head of the buried person when working, has the effect of refreshing and preventing drowsiness, and reduces the probability that the buried person misses the rescue.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, and although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A sound-emitting device for emergency rescue in case of accident, characterized in that: The utility model provides a support column (1) and embedded support column (1) inside slide bar (2) including hollow structure, the middle part of slide bar (2) is along the length direction of slide bar (2) with support column (1) inside wall sliding fit; The inner wall of the support column (1) is provided with an elastic sheet (15) perpendicular to the slide bar (2), and one end of the elastic sheet (15) is located on the motion track of the slide bar (2); The drive part is arranged between the slide bar (2) and the support column (1) for driving the slide bar (2) to reciprocatingly slide in the support column (1); One end of the elastic sheet (15) away from the slide bar (2) penetrates through the side wall of the support column (1) and extends out of the support column (1), and the middle part of the elastic sheet (15) is tightly fitted and inserted with the side wall of the support column (1); The drive part includes a rotating disc (3) embedded in one end of the support column (1), the rotating disc (3) is rotationally connected with the support column (1) with the axis of the rotating disc (3) as the center line of rotation, and the axis of the rotating disc (3) is perpendicular to the slide bar (2); A strip-shaped hole (21) extending towards the width direction of the slide bar (2) is formed on the slide bar (2), and the length direction of the strip-shaped hole (21) is parallel to the rotating disc (3); A cylindrical column (31) is arranged on the upper edge of one plane of the rotating disc (3) facing the slide bar (2), one end of the cylindrical column (31) is fixedly connected with the rotating disc (3), the other end extends axially towards the rotating disc (3) and is inserted into the strip-shaped hole (21), and the outer cylindrical surface of the cylindrical column (31) is attached to the two side walls of the strip-shaped hole (21) along the length direction of the slide bar (2).

2. The sound-emitting device for emergency rescue in case of accident according to claim 1, characterized in that: A rotating rod (32) coaxial with the rotating disc (3) is arranged on one plane of the rotating disc (3) away from the slide bar (2), one end of the rotating rod (32) is fixedly connected with the rotating disc (3), the other end penetrates through the side wall of the support column (1) and extends out of the support column (1), and the rotating rod (32) is rotationally fitted with the side wall of the support column (1).

3. The sound-emitting device for emergency rescue in case of accident according to claim 2, characterized in that: One end of the rotating rod (32) away from the rotating disc (3) is provided with a handle (33), the handle (33) is in the shape of a polygonal prism, and one end of the handle (33) is fixedly connected with the rotating rod (32).

4. The sound producing device for emergency rescue in case of accident according to claim 2, characterized in that: A coil spring (34) coaxial with the rotating disc (3) is arranged on one plane of the rotating disc (3) away from the slide bar (2), the inner end of the coil spring (34) is fixedly connected with the rotating disc (3), and the outer end is fixedly connected with the inner wall of the support column (1).

5. The sound-emitting device for emergency rescue in case of accident according to claim 4, characterized in that: A plurality of grooves (35) uniformly distributed along the circumferential direction of the rotating disc (3) are formed on the outer circumferential surface of the rotating disc (3), and a slide hole (11) communicating between the inner and outer sides of the support column (1) is formed on the outer side wall of the support column (1); A limiting block (12) is arranged in the slide hole (11), one end of the limiting block (12) is slidingly fitted with the slide hole (11), and the other end is inserted into one of the grooves (35).

6. The sound-emitting device for emergency rescue in case of accident according to claim 5, characterized in that: One end of the limiting block (12) facing the rotating disc (3) is in the shape of a wedge, and the groove (35) is matched with the wedge-shaped end of the limiting block (12); The limiting block (12) is provided with a spring (13) at the end away from the rotating disc (3), one end of the spring (13) is fixedly connected with the limiting block (12), the other end is connected with the side wall of the sliding hole (11), and the wedge-shaped end of the limiting block (12) is in contact with the inclined surface of the groove (35) when the spring (13) is in a natural extension state.

7. The sound-emitting device for emergency rescue in case of accident according to claim 6, characterized in that: The sliding hole (11) is provided with an adjusting rod (14) at the end away from the rotating disc (3), the middle part of the adjusting rod (14) is connected with the side wall of the end of the sliding hole (11) away from the rotating disc (3) through threaded cooperation; One end of the adjusting rod (14) is inserted into the limiting block (12) and is rotationally connected with the limiting block (12) around the axis of the adjusting rod (14), and the other end of the adjusting rod (14) protrudes out of the sliding hole (11); The spring (13) is embedded in the limiting block (12) and coaxial with the adjusting rod (14), one end of the spring (13) is in contact with the end of the adjusting rod (14) facing the limiting block (12), and the other end of the spring (13) is in contact with the limiting block (12).

8. A safety helmet comprising the sound-emitting device for emergency rescue in an accident according to any one of claims 1 to 7 and a safety helmet main body (4), characterized in that: One end of the supporting column (1) is detachably connected with the top surface of the safety helmet.

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