Early warning evacuation guiding device for industrial park in emergency situation

Abstract

The invention relates to an early warning evacuation guide device for an emergency industrial park, and relates to the technical field of environmental monitoring and early warning, the early warning evacuation guide device comprises a box body, the bottom of the box body is provided with a driving front wheel and a driven rear wheel, and the box body is internally provided with a plurality of guide boards and a conveying mechanism for conveying the guide boards to the bottom of the box body one by one; a disconnecting mechanism is arranged at the bottom end of the conveying mechanism, and the guide boards fall onto the ground after being separated from the conveying mechanism through the disconnecting mechanism; a hammering mechanism which is used for pressing the guide board to the ground and connecting an internal circuit of the guide board is arranged behind the conveying mechanism; a driving mechanism used for driving the conveying mechanism to operate is further arranged in the box body, and the driving mechanism is located on the side of the driven rear wheel so that the driven rear wheel can synchronously drive the driving mechanism to operate. According to the device, on one hand, people can be guided to be evacuated rapidly through moving guidance of the box body, on the other hand, an evacuation path can be reserved through the guide board so as to guide subsequent people to be evacuated, and long-time effectiveness of the evacuation guide device is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental monitoring and early warning, and in particular relates to an early warning evacuation guidance device for an industrial park in case of emergencies. Background Art

[0002] Early warning evacuation guidance devices are key equipment to ensure that industrial parks can evacuate personnel quickly and orderly in the event of fire, earthquake or other emergencies. Early warning evacuation guidance devices are widely used in every corner of industrial parks, including production workshops, warehouses, office areas, rest areas, etc. In an emergency, they can be quickly activated to provide personnel with clear evacuation instructions and safe escape routes.

[0003] A common type of existing early warning evacuation guidance device is a movable box-type evacuation guidance robot. The mobile box can be easily moved and deployed to adapt to different environments and scenarios. Multiple functions may be integrated inside the mobile box, such as sound alarm, light indication, display screen showing evacuation routes, etc. These functions work together to ensure that clear and accurate evacuation information is provided to people in an emergency. The evacuation guidance robot leads the crowd to quickly escape from the danger zone, but it can only lead the crowd around the robot. In other words, the early warning evacuation guidance instructions are difficult to exist for a long time. As the robot moves away, it is difficult for subsequent people in the danger zone to receive the early warning evacuation guidance instructions.

[0004] To this end, we provide an early warning evacuation guidance device for emergency industrial parks to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide an early warning evacuation guidance device for an industrial park in case of an emergency, in view of the problems of the background technology.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A warning evacuation guide device for an industrial park in case of an emergency, comprising a box body, a driving front wheel and a driven rear wheel are respectively provided at the bottom of the box body, a plurality of guide signs and a conveying mechanism for conveying the guide signs one by one to the bottom of the box body are provided inside the box body; a disconnecting mechanism is provided at the bottom end of the conveying mechanism, and the guide signs fall to the ground after being separated from the conveying mechanism by the disconnecting mechanism; a hammering mechanism is provided at the rear of the conveying mechanism for pressing the guide signs to the ground and connecting the internal circuit of the guide signs; a driving mechanism for driving the conveying mechanism to operate is also provided in the box body, and the driving mechanism is located on the side of the driven rear wheel so that the driven rear wheel can synchronously drive the driving mechanism to operate.

[0008] As a further optimization solution of the present invention, a collector and a warning light are respectively provided on the top of the box; and display screens are provided on the four sides of the box.

[0009] As a further optimization scheme of the present invention, the conveying mechanism includes a mounting frame and a driven member and a driving member rotatably arranged at both ends of the mounting frame respectively; a transmission member is wound between the driven member and the driving member, and a plurality of equally spaced clamping members are fixedly provided on the transmission member, and the guide plate is clamped on the clamping member.

[0010] As a further optimization scheme of the present invention, the clamping part includes a fixed block and a movable rod located inside the fixed block; the two ends of the movable rod are respectively provided with a clamping block and a first wedge block, the end of the guide plate is provided with a clamping groove that is engaged with the clamping block, and a first spring is sleeved on the movable rod at the clamping block, one end of the first spring is fixedly connected to the fixed block, and the other end is fixedly connected to the movable rod.

[0011] As a further optimization solution of the present invention, the disconnection mechanism includes a rod body fixed on the mounting frame; the end of the rod body is provided with a second wedge block that matches the first wedge block.

[0012] As a further optimization scheme of the present invention, the guide sign includes a main body; a transparent plate is provided on the top of the main body, a sticky pad is provided on the bottom of the main body, and a coating is provided on the bottom of the sticky pad; a luminous light strip, a buzzer, a power supply and a switch are respectively provided inside the main body, and the switch includes a first metal sheet fixed on the main body and a second metal sheet hinged on the main body, and the closure of the second metal sheet and the first metal sheet controls the operation of the luminous light strip and the buzzer.

[0013] As a further optimization scheme of the present invention, a film tearing mechanism for peeling the coating off the sticky pad is provided above the disconnecting mechanism; the film tearing mechanism includes a first bearing seat fixed to the mounting frame by a bracket, a third gear is rotatably provided on the first bearing seat, a toggle rod is fixedly provided on the end face of the third gear, a sawtooth block is provided at the end of the toggle rod, and a through hole for the sawtooth block to pass through is provided at the edge of the coating; a plurality of racks distributed at equal intervals are provided on the transmission member for driving the third gear to rotate.

[0014] As a further optimization scheme of the present invention, the driving mechanism includes a rotating frame and a second gear ring and a third gear ring fixed on both sides of the rotating frame and coaxially arranged; a second gear meshing with the second gear ring is provided on the side of the second gear ring, and a first gear meshing with the second gear ring is provided on the side of the second gear ring, and the first gear ring is fixed on the driven rear wheel; the third gear ring is set as an incomplete gear ring, and a first gear meshing with the third gear ring is fixed on the rotating shaft of the active member.

[0015] As a further optimization scheme of the present invention, the hammer mechanism includes a second bearing seat and a fourth gear rotatably arranged on the second bearing seat; a cam is provided at one end of the rotating shaft of the fourth gear, a fixed seat is provided below the cam, a striking hammer is movably penetrated through the fixed seat, a pressure plate matching the cam is provided at the top of the striking hammer, and a second spring is sleeved on the striking hammer between the pressure plate and the fixed seat; a fourth gear ring is provided between the second gear ring and the third gear ring, the fourth gear ring is also set as an incomplete gear, and meshes with the fourth gear.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention provides a box, a conveying mechanism and a guide sign, so that the device can, on the one hand, guide the movement of the box to lead the crowd to evacuate quickly, and on the other hand, it can also leave an evacuation path through the guide sign to guide the evacuation of subsequent people, thereby ensuring the long-term effectiveness of the evacuation guidance device.

[0018] 2. The present invention sets a driving mechanism so that the conveying mechanism can cooperate with the movement of the box, and the guide signs can be automatically placed at intervals, which is more energy-saving and environmentally friendly, and can cope with the situation where the box power is damaged and cannot operate. At this time, the evacuees can manually push the box to move.

[0019] 3. The present invention can further improve the adsorption strength between the guide sign and the ground by providing a hammering mechanism to hammer the guide sign. Meanwhile, the hammering mechanism can automatically connect the internal circuit of the guide sign during the hammering process, so that the guide sign can automatically emit early warning sound and light for evacuation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure of the present invention is shown in three dimensions. Figure 1 ;

[0021] Figure 2 The overall structure of the present invention is shown in three dimensions. Figure 2 ;

[0022] Figure 3 It is a schematic diagram of the internal structure of the box of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the conveying mechanism of the present invention;

[0024] Figure 5 It is a schematic diagram of the explosion structure of the guide plate of the present invention;

[0025] Figure 6 It is a schematic diagram of the film tearing mechanism structure of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the clamping member and the disconnection mechanism of the present invention;

[0027] Figure 8 It is a schematic diagram of the driving mechanism structure of the present invention;

[0028] Fig. 9 It is a schematic diagram of the hammer mechanism structure of the present invention.

[0029] In the figure:

[0030] 1. Box; 101. Driving front wheel; 102. Driven rear wheel; 103. Collector; 104. Warning light; 105. Display screen; 2. Conveying mechanism; 201. Mounting frame; 202. Follower; 203. Active member; 204. Transmission member; 205. First gear; 206. Snap-on member; 206a. Fixed block; 206b. Movable rod; 206c. Block; 206d. First spring; 206e. First wedge block; 207. Rack; 3. Guide plate; 301. Main body; 302. Slot; 303. Transparent plate; 304. Adhesive pad; 305. Lamination; 305a. Perforation; 306. Light strip; 307. Buzzer; 308, power supply; 309, switch; 309a, first metal sheet; 309b, second metal sheet; 4, driving mechanism; 401, first gear ring; 402, second gear; 403, second gear ring; 404, rotating frame; 405, third gear ring; 406, fourth gear ring; 5, hammer mechanism; 501, fourth gear; 502, second bearing seat; 503, cam; 504, fixed seat; 505, knocking hammer; 506, pressure plate; 507, second spring; 6, film tearing mechanism; 601, first bearing seat; 602, third gear; 603, toggle rod; 604, sawtooth block; 7, disconnecting mechanism; 701, rod body; 702, second wedge block. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0032] Embodiment 1

[0033] In order to solve the problem that the existing early warning evacuation guidance device can only lead the people around the device to escape from the dangerous area, and as the device moves away from the dangerous area, the subsequent people in the dangerous area are difficult to receive the early warning evacuation guidance instructions, please refer to Figure 1-Figure 4The present invention provides an early warning evacuation guiding device for an industrial park in case of an emergency, comprising a box 1, a driving front wheel 101 and a driven rear wheel 102 are respectively arranged at the bottom of the box 1, a collector 103 and a warning light 104 are respectively arranged at the top of the box 1, the collector 103 includes various sensors (such as smoke detectors, temperature sensors, etc.), and monitors the surrounding environment in real time when the box 1 is stationary or moving, and issues an early warning through the warning light 104 when encountering an emergency, and a display screen 105 is arranged on the four sides of the box 1, and the display screen 105 can be used to display the evacuation path, environmental monitoring data, etc.; a plurality of guide signs 3 and a conveying mechanism 2 for conveying the guide signs 3 to move one by one to the bottom of the box 1 are arranged inside the box 1; a disconnection mechanism 7 is arranged at the bottom end of the conveying mechanism 2, and the guide signs 3 are separated from the conveying mechanism 2 by the disconnection mechanism 7 and fall to the ground and are adsorbed. During the movement of the box 1, the guide signs 3 are placed one by one on the ground of the moving path through the conveying mechanism 2, thereby realizing the early warning evacuation guidance of the crowd.

[0034] like Figure 4 , Figure 7 As shown, the conveying mechanism 2 includes a mounting frame 201 and a driven member 202 and a driving member 203 which are respectively rotatably arranged at both ends of the mounting frame 201; a transmission member 204 is wound between the driven member 202 and the driving member 203, and the transmission member 204 includes but is not limited to a chain, a chain plate, a belt, a steel belt, etc. The driven member 202 and the driving member 203 match the transmission member 204 which is configured as a sprocket, a chain roller, a gear, etc. A plurality of equally spaced clamping members 206 are fixedly arranged on the transmission member 204, and the guide plate 3 is clamped on the clamping member 206; the clamping member 206 includes a fixed block 206a and a movable rod 206b located inside the fixed block 206a; a clamping block 206c and a first wedge block 206e are respectively provided at both ends of the movable rod 206b, and a clamping groove 302 is provided at the end of the guide plate 3 for clamping with the clamping block 206c, and a first spring 206d is sleeved on the movable rod 206b at the clamping block 206c, one end of the first spring 206d is fixedly connected to the fixed block 206a, and the other end is fixedly connected to the movable rod 206b.

[0035] The disconnection mechanism 7 includes a rod body 701 fixed on the mounting frame 201; the end of the rod body 701 is provided with a second wedge block 702 matched with the first wedge block 206e. When the guide card 3 moves to the disconnection mechanism 7 along with the conveying mechanism 2, due to the obstruction of the second wedge block 702, the first wedge block 206e moves toward the mounting frame 201, the first wedge block 206e drives the movable rod 206b to move, the first spring 206d is stretched, and the movable rod 206b drives the clamping block 206c to retract into the fixed block 206a, so that the guide card 3 is separated from the clamping member 206. As the conveying mechanism 2 continues to move, due to the loss of the obstruction of the second wedge block 702, the clamping block 206c re-extends out of the fixed block 206a under the reset force of the first spring 206d.

[0036] In order to improve the warning and evacuation effect of the guide sign 3, Figure 5 As shown, the guide sign 3 includes a main body 301; a transparent plate 303 is provided on the top of the main body 301, and a light strip 306, a buzzer 307, a power supply 308 and a switch 309 are respectively provided inside the main body 301. The switch 309 includes a first metal sheet 309a fixed on the main body 301 and a second metal sheet 309b hinged on the main body 301. The closing of the second metal sheet 309b and the first metal sheet 309a controls the operation of the light strip 306 and the buzzer 307. The switch 309 connects the circuit, so that the light strip 306 emits an indicator light and the buzzer 307 emits a warning sound, so that the subsequent crowd can quickly escape from the dangerous area based on the guide path.

[0037] In order to prevent the guide sign 3 from changing direction due to factors such as being kicked by the crowd or being blown by the wind, causing the wrong direction to be indicated, Figure 4-Figure 6 As shown, a sticky pad 304 is provided at the bottom of the main body 301, and a coating 305 is provided at the bottom of the sticky pad 304; a film tearing mechanism 6 for peeling the coating 305 off the sticky pad 304 is provided above the disconnection mechanism 7; the film tearing mechanism 6 includes a first bearing seat 601 fixed to the mounting frame 201 by a bracket, a third gear 602 is rotatably provided on the first bearing seat 601, a torsion spring for resetting is provided on the rotating shaft of the third gear 602, a toggle rod 603 is fixed on the end face of the third gear 602, a sawtooth block 604 is provided at the end of the toggle rod 603, and a through hole 305a for the sawtooth block 604 to pass through is provided at the edge of the coating 305; a plurality of racks 207 distributed at equal intervals for driving the third gear 602 to rotate are provided on the transmission member 204.

[0038] When the guide sign 3 moves to the film tearing mechanism 6 with the conveying mechanism 2, the sawtooth block 604 is just inserted into the perforation 305a. As the conveying mechanism 2 continues to move, the rack 207 thereon drives the third gear 602 to rotate, the third gear 602 drives the toggle rod 603 to rotate, the toggle rod 603 drives the sawtooth block 604 to rotate, and the sawtooth block 604 drives the coating 305 to rotate, and the coating 305 is torn off the sticky pad 304, so that the guide sign 3 can be adsorbed to the ground through the sticky pad 304 to avoid changing direction due to factors such as being kicked by the crowd and being tossed by wind, thereby ensuring the correctness of the indicated direction; when the rack 207 is separated from the third gear 602, under the action of the torsion spring, the sawtooth block 604 is reset to facilitate the film tearing of the next guide sign 3.

[0039] Embodiment 2

[0040] On the basis of the first embodiment, in order to make the conveying mechanism 2 cooperate with the movement of the box body 1, so that the guide signs 3 can be placed at intervals, as shown in FIG. Figure 2-Figure 3 , Figure 8 As shown, a driving mechanism 4 for driving the conveying mechanism 2 to operate is also provided in the box body 1 , and the driving mechanism 4 is located on the side of the driven rear wheel 102 so that the driven rear wheel 102 can synchronously drive the driving mechanism 4 to operate.

[0041] The driving mechanism 4 includes a rotating frame 404 and a second gear ring 403 and a third gear ring 405 fixed on both sides of the rotating frame 404 and arranged coaxially; a second gear 402 meshing with the second gear ring 403 is provided on the side thereof, and a first gear ring 401 meshing with the second gear 402 is provided on the side thereof, and the first gear ring 401 is fixed on the driven rear wheel 102; the third gear ring 405 is set as an incomplete gear ring, and a first gear 205 meshing with the third gear ring 405 is fixed on the rotating shaft of the active member 203.

[0042] During the movement of the box body 1, the driven rear wheel 102 drives the first ring gear 401 to rotate, the first ring gear 401 drives the second gear 402 to rotate, the second gear 402 drives the second ring gear 403 to rotate, and the second ring gear 403 drives the third ring gear 405 to rotate. Since the third ring gear 405 is an incomplete gear, when the serrated portion of the third ring gear 405 contacts the first gear 205, it drives the first gear 205 to rotate, thereby driving the entire conveying mechanism 2 to operate and move the guide sign 3 to the bottom of the box body 1. When the smooth portion of the third ring gear 405 rotates to the first gear 205, the first gear 205 does not rotate, so as to achieve the interval placement of the guide signs 3, such as placing one every 5 meters.

[0043] Embodiment 3

[0044] On the basis of the first and second embodiments, in order to further improve the adsorption strength between the guide plate 3 and the ground, as Figure 2-Figure 3 , Fig. 9 As shown, a hammer mechanism 5 for pressing the guide sign 3 to the ground and connecting the internal circuit of the guide sign 3 is provided behind the conveying mechanism 2 .

[0045] The hammer mechanism 5 includes a second bearing seat 502 and a fourth gear 501 rotatably arranged on the second bearing seat 502; a cam 503 is provided at one end of the rotating shaft of the fourth gear 501, a fixed seat 504 is provided below the cam 503, a striking hammer 505 is movably penetrated through the fixed seat 504, a pressing plate 506 matching the cam 503 is provided at the top of the striking hammer 505, and a second spring 507 is sleeved on the striking hammer 505 between the pressing plate 506 and the fixed seat 504; a fourth gear ring 406 is provided between the second gear ring 403 and the third gear ring 405, and the fourth gear ring 406 is also set as an incomplete gear and meshes with the fourth gear 501.

[0046] During the movement of the box body 1, the driven rear wheel 102 drives the first gear ring 401 to rotate, the first gear ring 401 drives the second gear 402 to rotate, the second gear 402 drives the second gear ring 403 to rotate, the second gear ring 403 drives the third gear ring 405 to rotate, and drives the fourth gear ring 406 to rotate. Since the fourth gear ring 406 is an incomplete gear, when the serration of the fourth gear ring 406 contacts the fourth gear 501, it drives the fourth gear 501 to rotate, and the fourth gear 501 drives the cam 503 to rotate. When the tip of the cam 503 rotates to the bottom, the pressure plate 506 is exerted. The pressure is applied, and the pressing plate 506 drives the knocking hammer 505 to press down, pressing the guide sign 3 to the ground. At the same time, during the pressing process, the second metal sheet 309b and the first metal sheet 309a are automatically closed, thereby realizing the automatic connection of the internal circuit of the guide sign 3. When the smooth part of the fourth gear ring 406 rotates to the fourth gear 501, the fourth gear 501 loses its limiting force, and under the action of the second spring 507, the knocking hammer 505 is reset; the action of the hammering mechanism 5 matches the falling action of the guide sign 3, and the knocking action begins when the hammering mechanism 5 moves to the top of the guide sign 3 on the ground.

[0047] The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An early warning evacuation guidance device for an industrial park in case of an emergency, comprising a box (1), wherein a driving front wheel (101) and a driven rear wheel (102) are respectively provided at the bottom of the box (1), characterized in that: The box (1) is provided with a plurality of guide signs (3) inside and a conveying mechanism (2) for conveying the guide signs (3) one by one to the bottom of the box (1); A disconnection mechanism (7) is provided at the bottom end of the conveying mechanism (2), and the guide sign (3) falls to the ground after being separated from the conveying mechanism (2) by the disconnection mechanism (7); A hammer mechanism (5) is provided at the rear of the conveying mechanism (2) for pressing the guide sign (3) onto the ground and connecting the internal circuit of the guide sign (3); A driving mechanism (4) for driving the conveying mechanism (2) to operate is also provided in the box body (1); the driving mechanism (4) is located on the side of the driven rear wheel (102) so that the driven rear wheel (102) can synchronously drive the driving mechanism (4) to operate.

2. The early warning evacuation guidance device for an industrial park in case of an emergency according to claim 1, characterized in that: A collector (103) and a warning light (104) are respectively provided on the top of the box (1); Display screens (105) are provided on the four sides of the box body (1).

3. The early warning evacuation guidance device for an industrial park in case of an emergency according to claim 1, characterized in that: The conveying mechanism (2) comprises a mounting frame (201) and a driven member (202) and a driving member (203) which are rotatably arranged at two ends of the mounting frame (201) respectively; A transmission member (204) is wound between the driven member (202) and the active member (203), a plurality of equally spaced clamping members (206) are fixedly provided on the transmission member (204), and the guide plate (3) is clamped on the clamping member (206).

4. The early warning evacuation guidance device for an industrial park in case of an emergency according to claim 3, characterized in that: The clamping member (206) comprises a fixed block (206a) and a movable rod (206b) located inside the fixed block (206a); The two ends of the movable rod (206b) are respectively provided with a clamping block (206c) and a first wedge block (206e); the end of the guide plate (3) is provided with a clamping groove (302) that is clamped and matched with the clamping block (206c); the movable rod (206b) at the clamping block (206c) is sleeved with a first spring (206d); one end of the first spring (206d) is fixedly connected to the fixed block (206a), and the other end is fixedly connected to the movable rod (206b).

5. The early warning evacuation guidance device for an industrial park in case of an emergency according to claim 4, characterized in that: The disconnection mechanism (7) comprises a rod body (701) fixed on the mounting frame (201); The end of the rod body (701) is provided with a second wedge block (702) that matches the first wedge block (206e).

6. The early warning evacuation guidance device for an industrial park in case of an emergency according to claim 3, characterized in that: The guide sign (3) comprises a main body (301); A transparent plate (303) is provided on the top of the main body (301), a sticky rubber pad (304) is provided on the bottom of the main body (301), and a coating (305) is provided on the bottom of the sticky rubber pad (304); The main body (301) is provided with a light strip (306), a buzzer (307), a power supply (308) and a switch (309) respectively. The switch (309) comprises a first metal sheet (309a) fixed on the main body (301) and a second metal sheet (309b) hinged on the main body (301). The closing of the second metal sheet (309b) and the first metal sheet (309a) controls the operation of the light strip (306) and the buzzer (307).

7. The early warning evacuation guidance device for an industrial park in case of an emergency according to claim 6, characterized in that: A film peeling mechanism (6) for peeling the covering film (305) off the adhesive pad (304) is provided above the disconnection mechanism (7); The film tearing mechanism (6) comprises a first bearing seat (601) fixed on the mounting frame (201) through a bracket, a third gear (602) is rotatably provided on the first bearing seat (601), a toggle rod (603) is fixedly provided on the end surface of the third gear (602), a sawtooth block (604) is provided at the end of the toggle rod (603), and a through hole (305a) for the sawtooth block (604) to pass through is provided at the edge of the coating (305); The transmission member (204) is provided with a plurality of racks (207) distributed at equal intervals and used to drive the third gear (602) to rotate.

8. The early warning evacuation guidance device for an industrial park in case of an emergency according to claim 3, characterized in that: The driving mechanism (4) comprises a rotating frame (404), and a second gear ring (403) and a third gear ring (405) fixedly arranged on both sides of the rotating frame (404) and coaxially arranged; A second gear (402) meshing with the second gear ring (403) is provided on the side thereof, a first gear ring (401) meshing with the second gear (402) is provided on the side thereof, and the first gear ring (401) is fixed on the driven rear wheel (102); The third gear ring (405) is configured as an incomplete gear ring, and a first gear (205) meshing with the third gear ring (405) is fixedly disposed on the rotating shaft of the active member (203).

9. The early warning evacuation guidance device for an industrial park in case of an emergency according to claim 8, characterized in that: The hammer mechanism (5) comprises a second bearing seat (502) and a fourth gear (501) rotatably arranged on the second bearing seat (502); A cam (503) is provided at one end of the rotating shaft of the fourth gear (501), a fixed seat (504) is provided below the cam (503), a knocking hammer (505) is movably penetrated on the fixed seat (504), a pressing plate (506) matched with the cam (503) is provided at the top of the knocking hammer (505), and a second spring (507) is sleeved on the knocking hammer (505) between the pressing plate (506) and the fixed seat (504); A fourth gear ring (406) is disposed between the second gear ring (403) and the third gear ring (405). The fourth gear ring (406) is also configured as an incomplete gear and meshes with the fourth gear (501).

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