CN213463562U

CN213463562U - Safe fire prevention mosquito-repellent incense dish

Info

Publication number: CN213463562U
Application number: CN202022391706.9U
Authority: CN
Inventors: 徐梦瑶; 黄志辉; 王振宇
Original assignee: Wuxi Institute of Technology
Current assignee: Wuxi Institute of Technology
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-06-18
Anticipated expiration: 2030-10-23

Abstract

The utility model provides a safe fire prevention mosquito-repellent incense dish relates to mosquito-proof articles for use technical field, which comprises a base, the top surface on chassis is the opening form, the activity is provided with well lid on the opening of chassis top surface, well lid is both ends open-ended ring columnar body, the fixed main horizontal bar and a plurality of vice horizontal bar that are provided with of well lid internal level, vice horizontal bar symmetric distribution is in the both sides of main horizontal bar, and parallel interval distribution between two adjacent vice horizontal bars, be provided with mosquito-repellent incense strutting arrangement on the main horizontal bar, the activity is provided with the upper cover in covering, the upper cover includes outer lid, swing joint between outer lid and the well lid of going up, it is bottom surface open-ended ring columnar body to go up outer lid, the activity runs through on the top surface of last outer lid is provided with the knob axle, and the one end of knob axle is located the outside of outer lid, a plurality of baffles of circumference equipartition on the. The utility model has the advantages of safe use, convenient extinguishing of the mosquito-repellent incense, material saving, etc.

Description

Safe fire prevention mosquito-repellent incense dish

Technical Field

The utility model relates to a mosquito-proof articles for use technical field, concretely relates to safe fire prevention mosquito-repellent incense dish.

Background

The mosquito coil tray is generally used for containing mosquito coils in summer, can collect ash-shaped substances left after the mosquito coils are burnt, and can repel the mosquitoes when the mosquito coils are burnt. At present, two mosquito-repellent incense discs are commonly used in the market, one is disc-shaped, and the ignited mosquito-repellent incense is directly placed on the disc-shaped mosquito-repellent incense disc, so that the main defects are that the mosquito-repellent incense is directly exposed in air, the safety coefficient is not high, and the mosquito-repellent incense can only be manually cut off when needing to be extinguished, thereby wasting materials; the other is cage-shaped, the ignited mosquito coil is hung in the cage, although the safety factor is improved, the mosquito coil has the defect that the mosquito coil can only be manually cut off when the mosquito coil needs to be extinguished, and materials are wasted. Aiming at the defects that the mosquito-repellent incense disk sold in the market at present has low safety coefficient, can not realize automatic extinguishing, wastes materials and the like, a novel safe fireproof mosquito-repellent incense disk is designed and researched for solving the problems.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a safe and fireproof mosquito-repellent incense disk which is safe in use, convenient to extinguish the mosquito-repellent incense and saves materials.

In order to solve the technical problem, the utility model provides a safe fireproof mosquito-repellent incense disc, which comprises a chassis, wherein the top surface of the chassis is in an open shape, a middle cover is movably arranged on the opening of the top surface of the chassis, the middle cover is a circular cylindrical body with two open ends, a main transverse strip and a plurality of auxiliary transverse strips are horizontally and fixedly arranged in the middle cover, the auxiliary transverse strips are symmetrically distributed at two sides of the main transverse strip, two adjacent auxiliary transverse strips are distributed at intervals in parallel, a mosquito-repellent incense supporting device is arranged on the main transverse strip, an upper cover is movably arranged on the middle cover, the upper cover comprises an upper outer cover body, the upper outer cover body is movably connected with the middle cover, the upper outer cover body is a circular cylindrical body with an open bottom surface, a knob shaft is movably arranged on the top surface of the upper outer cover body in a penetrating way, one end of the knob shaft is arranged outside the upper outer cover body, a plurality of baffles are uniformly distributed on the outer peripheral wall of the other end of the knob, the smoke exhaust hole is matched with the baffle in shape and size, a pressure bar groove is arranged on the end face of the other end of the knob shaft, a pressure bar is movably arranged in the pressure bar groove, the position of the pressure bar is up and down corresponding to that of the mosquito-repellent incense supporting device, a return spring is fixedly arranged between one end of the pressure rod and the bottom in the pressure rod groove, the other end of the pressure rod is positioned outside the pressure rod groove, the other end of the pressure rod is in an open shape, and a plurality of notches are uniformly distributed on the opening at the other end of the pressing rod along the circumferential direction, a hollow hemispherical outer cover is movably arranged outside the upper outer cover body, a sealing ring is fixedly sleeved outside the circular end of the hemispherical outer cover, a plurality of clamping pins are uniformly distributed on the bottom surface of the sealing ring along the circumferential direction, a circular annular step groove is formed in the top surface of the upper outer cover body, the sealing ring is matched with the circular annular step groove in size, clamping pin grooves corresponding to the clamping pins in a one-to-one mode are formed in the circular annular step groove, and the clamping pins are respectively movably inserted into the clamping pin grooves at corresponding positions.

Preferably, the mosquito-repellent incense supporting device comprises a supporting column, an upper through hole is arranged on the top surface of the main cross bar, a lower through hole is arranged on the bottom surface of the main cross bar, the upper through hole and the lower through hole are coaxial, the upper through hole is communicated with the lower through hole, the diameter of the lower through hole is larger than that of the upper through hole, the supporting column is slidably arranged in the upper through hole, one end of the supporting column movably penetrates through the upper through hole to the lower through hole, the other end of the supporting column is positioned outside the upper through hole, a supporting sheet is fixedly arranged at the other end of the supporting column, a limiting disc is fixedly arranged at one end of the supporting column, the outer peripheral wall of the limiting disc is contacted with the inner wall of the lower through hole, a spring is further arranged in the lower through hole, one end of the spring is contacted with the limiting disc, an adjusting bolt is, the compression bar and the support column are coaxial, so that the mosquito-repellent incense can be inserted on the support column when in use, and the stability of the placed mosquito-repellent incense is improved; meanwhile, after the mosquito-repellent incense is placed and the upper cover is covered, the other end of the pressing rod is pressed on the mosquito-repellent incense and matched with the mosquito-repellent incense supporting device, and the stability of the placed mosquito-repellent incense can be improved.

Preferably, a plurality of longitudinal supporting rod holes are formed in the top surface of the auxiliary cross bar at intervals along the length direction, longitudinal supporting rods are movably arranged in the longitudinal supporting rod holes, the longitudinal supporting rods are conveniently installed in the longitudinal supporting rod holes as required, and the mosquito-repellent incense can be supported by the longitudinal supporting rods.

Preferably, an ash collecting groove is formed in the bottom surface in the base plate, and an ash collecting disc is movably clamped in the ash collecting groove, so that the ash collecting disc can be conveniently taken out of the ash collecting groove, and the accumulated burning mosquito-repellent incense can be thoroughly cleaned.

Preferably, the mosquito-repellent incense strutting arrangement is located the intermediate position department of main horizontal bar, and the top surface of the main horizontal bar of mosquito-repellent incense strutting arrangement both sides is the arc form, can reduce the mosquito-repellent incense after the burning and stop on main horizontal bar, is favorable to collecting the mosquito-repellent incense after the burning.

Preferably, interference fit between the top surface of knob axle and last enclosing cover body is convenient for rotate the knob axle on last enclosing cover body to the position of the baffle on the outer peripheral wall of adjustable knob axle other end realizes that the baffle covers the size of area to the smoke vent, thereby can control the burning of mosquito-repellent incense or extinguish.

Preferably, the opening inner wall of chassis top surface is the internal thread form, and the one end of well lid is the external screw thread form, and the other end of well lid is the internal thread form, and threaded connection between the one end of well lid and the opening of chassis top surface, and the bottom surface opening of going up the outer lid is the external screw thread form, and threaded connection between the bottom surface opening of going up the outer lid and the other end of well lid, is convenient for tear apart the back with chassis, well lid and last outer lid, places the mosquito-repellent incense in well lid or clear up the mosquito-repellent incense after the burning.

The utility model has the advantages that:

(1) when in use, the mosquito-repellent incense can be placed in the middle cover, and because the upper end and the lower end of the middle cover are respectively provided with the upper outer cover body and the chassis, the mosquito-repellent incense can be prevented from being directly exposed outside, the scalding to personnel during use can be prevented, the safety and fire prevention effect can be improved, the uniform collection of the burnt mosquito-repellent incense can be facilitated, and the sanitation of the environment can be ensured;

(2) the baffle plate can be driven to automatically extinguish the burning mosquito-repellent incense by rotating the knob shaft, and the mosquito-repellent incense does not need to be manually cut off to extinguish, so that the waste of the mosquito-repellent incense is avoided;

(3) the mosquito-repellent incense supporting device is matched with the pressure rod, and can clamp and fix the mosquito-repellent incense inserted on the supporting piece, thereby improving the stability of the placed mosquito-repellent incense.

Drawings

The accompanying drawings are included to provide a preferred understanding of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is an exploded view of the structure of a safe and fireproof mosquito-repellent incense tray of the present invention;

FIG. 2 is a schematic view of the position of the ash collecting groove of the safety fireproof mosquito-repellent incense tray of the present invention;

FIG. 3 is a schematic view of the notch position of the safety fireproof mosquito-repellent incense plate of the present invention;

FIG. 4 is a schematic view of the mosquito coil supporting device of the safety fireproof mosquito coil tray of the present invention;

FIG. 5 is a schematic view of the position of the upper through hole of the safety fireproof mosquito-repellent incense plate of the present invention;

FIG. 6 is a schematic view of the position of the mosquito coil supporting device of the safety fireproof mosquito coil tray of the present invention;

FIG. 7 is a schematic view of the position of the pressure bar slot of the safety fire-proof mosquito-repellent incense tray of the present invention;

the reference signs are: 1. a chassis; 11. a dust collecting groove; 12. an ash collecting disc; 2. a middle cover; 21. a main horizontal bar; 211. an upper through hole; 212. a lower through hole; 22. an auxiliary horizontal bar; 23. a mosquito incense supporting device; 231. a support pillar; 232. a support sheet; 233. a limiting disc; 234. a spring; 235. adjusting the bolt; 3. an upper cover; 31. an upper outer cover body; 32. a knob shaft; 33. a baffle plate; 34. a smoke vent; 35. a pressure bar groove; 36. a pressure lever; 37. a return spring; 38. a notch; 4. a hemispherical outer cover; 41. a seal ring; 42. clamping a pin; 43. a circular step groove; 44. a clamping foot groove; 5. a longitudinal strut aperture; 51. and a longitudinal supporting rod.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1-7, the safe and fireproof mosquito-repellent incense coil of this embodiment comprises a chassis 1, the top surface of the chassis 1 is open, a middle cover 2 is movably disposed on the opening of the top surface of the chassis 1, the middle cover 2 is a cylindrical body with two open ends, a main horizontal bar 21 and a plurality of auxiliary horizontal bars 22 are horizontally and fixedly disposed in the middle cover 2, the auxiliary horizontal bars 22 are symmetrically disposed on two sides of the main horizontal bar 21, and two adjacent auxiliary horizontal bars 22 are spaced and parallel, a mosquito-repellent incense supporting device 23 is disposed on the main horizontal bar 21, an upper cover 3 is movably disposed on the middle cover 2, the upper cover 3 comprises an upper outer cover body 31, the upper outer cover body 31 is movably connected with the middle cover 2, the upper outer cover body 31 is a cylindrical body with an open bottom, a knob shaft 32 is movably disposed on the top surface of the upper outer cover body 31 in a penetrating manner, one end of the knob shaft 32 is located outside the upper outer cover body 31, a plurality of baffles 33 are circumferentially and uniformly disposed on the other, a plurality of smoke discharge holes 34 with the same number as the baffles 33 are uniformly distributed on the top surface of the upper outer cover body 31 along the circumferential direction, the smoke discharge holes 34 are matched with the baffles 33 in shape and size, a pressure rod groove 35 is arranged on the end surface of the other end of the knob shaft 32, a pressure rod 36 is movably arranged in the pressure rod groove 35, the pressure rod 36 corresponds to the mosquito coil supporting device 23 up and down, a return spring 37 is fixedly arranged between one end of the pressure rod 36 and the bottom in the pressure rod groove 35, the other end of the pressure rod 36 is positioned outside the pressure rod groove 35, the other end of the pressure rod 36 is open, a plurality of notches 38 are uniformly distributed on the opening of the other end of the pressure rod 36 along the circumferential direction, a hollow hemispherical outer cover 4 is also movably arranged outside the upper outer cover body 31, a sealing ring 41 is fixedly sleeved on the outside of the round surface end of the hemispherical outer cover 4, a plurality of clamping feet 42 are uniformly distributed on the bottom surface, the sealing ring 41 is matched with the annular step groove 43 in size, the annular step groove 43 is provided with clamping pin grooves 44 corresponding to the clamping pins 42 one by one, and the clamping pins 42 are respectively and movably inserted into the clamping pin grooves 44 at corresponding positions.

The mosquito incense supporting device 23 comprises a supporting column 231, an upper through hole 211 is arranged on the top surface of the main cross bar 21, a lower through hole 212 is arranged on the bottom surface of the main cross bar 21, the upper through hole 211 and the lower through hole 212 are coaxial, the upper through hole 211 is communicated with the lower through hole 212, the diameter of the lower through hole 212 is larger than that of the upper through hole 211, the supporting column 231 is arranged in the upper through hole 211 in a sliding manner, one end of the supporting column 231 movably penetrates through the upper through hole 211 to the lower through hole 212, the other end of the supporting column 231 is positioned outside the upper through hole 211, a supporting sheet 232 is fixedly arranged at the other end of the supporting column 231, a limiting disc 233 is fixedly arranged at one end of the supporting column 231, the peripheral wall of the limiting disc 233 is contacted with the inner wall of the lower through hole 212, a spring 234 is further arranged in the lower through hole 212, one end of the spring 234 is contacted with the limiting disc, the adjusting bolt 235 is in threaded connection with the lower through hole 212, and the pressure rod 36 and the support column 231 are coaxial, so that the mosquito-repellent incense can be conveniently inserted onto the support sheet 232 when in use, and the stability of the placed mosquito-repellent incense is improved; meanwhile, after the mosquito-repellent incense is placed and the upper cover 3 is covered, the other end of the pressure rod 36 is pressed on the mosquito-repellent incense and matched with the mosquito-repellent incense supporting device 23, so that the stability of the placed mosquito-repellent incense can be improved, a plurality of longitudinal support rod holes 5 are arranged on the top surface of the auxiliary cross bar 22 at intervals along the length direction, longitudinal support rods 51 are movably arranged in the longitudinal support rod holes 5, so that the longitudinal support rods 51 can be conveniently installed in the longitudinal support rod holes 5 according to requirements, the mosquito-repellent incense can be supported through the longitudinal support rods 51, an ash collecting groove 11 is arranged on the bottom surface in the chassis 1, an ash collecting disc 12 is movably clamped in the ash collecting groove 11, so that the ash collecting disc 12 can be conveniently taken out of the ash collecting groove 11, the accumulated burnt mosquito-repellent incense can be thoroughly cleaned, the mosquito-repellent incense supporting device 23 is positioned in the middle position of the main cross bar 21, the top surfaces of the main cross bars 21 on the two sides of the mosquito-repellent incense supporting device, is beneficial to collecting the burning mosquito incense, the knob shaft 32 is in interference fit with the top surface of the upper outer cover body 31, the knob shaft 32 can be conveniently rotated on the upper outer cover body 31, thereby adjusting the position of the baffle 33 on the peripheral wall at the other end of the knob shaft 32, realizing the size of the covering area of the baffle 33 to the smoke discharge hole 34, thereby controlling the burning or extinguishing of the mosquito-repellent incense, the inner wall of the opening on the top surface of the chassis 1 is in an internal thread shape, one end of the middle cover 2 is in an external thread shape, the other end of the middle cover 2 is in an internal thread shape, one end of the middle cover 2 is connected with the opening on the top surface of the chassis 1 by screw thread, the opening on the bottom surface of the upper outer cover body 31 is in the shape of external screw thread, and the bottom opening of the upper outer cover body 31 is in threaded connection with the other end of the middle cover 2, so that the mosquito-repellent incense is placed in the middle cover 2 or the burnt mosquito-repellent incense is cleaned after the chassis 1, the middle cover 2 and the upper outer cover body 31 are detached conveniently.

The utility model discloses a theory of use is: firstly, the upper cover 3 is unscrewed from the middle cover 2, whether the mosquito-repellent incense supporting device 23 is used or not is selected according to use requirements, when the mosquito-repellent incense supporting device 23 is used, the supporting sheet 232 and the supporting column 231 penetrate through the lower through hole 212 and the upper through hole 211 together, at the moment, the limiting disc 233 is positioned in the lower through hole 212, the supporting column 231 is positioned in the upper through hole 211, and the supporting sheet 232 extends out of the upper through hole 211; then the adjusting bolt 235 is in threaded connection with the lower through hole 212, at the moment, one end of the spring 234 is in contact with the limiting disc 233, so that the stability of the supporting column 231 in the upper through hole 211 and the stability of the limiting disc 233 in the lower through hole 212 are favorably maintained, then the mosquito-repellent incense is inserted on the supporting sheet 232, finally the hollow hemispherical outer cover 4 arranged outside the upper outer cover body 31 is taken down, after the mosquito-repellent incense is ignited, the upper outer cover body 31 is in threaded connection with the middle cover 2, and after the upper outer cover body 31 is covered, the other end of the pressure rod 36 can be pressed on the mosquito-repellent incense to be matched with the mosquito-repellent incense supporting device 23 to clamp the mosquito-; at the moment, the return spring 37 is compressed in the pressure rod groove 35, and the spring 234 is compressed in the lower through hole 212, so that the mosquito-repellent incense on the support sheet 232 cannot be pinched off by the buffer effect of the return spring 37 and the spring 234 when the mosquito-repellent incense is clamped; the knob shaft 32 is rotated on the upper outer cover body 31, so that the position of the baffle 33 on the outer peripheral wall at the other end of the knob shaft 32 can be adjusted, the size of the area covered by the baffle 33 on the smoke discharge hole 34 is realized, and the burning or extinguishing of the mosquito-repellent incense can be controlled; namely, when the positions of the baffle 33 and the smoke discharge hole 34 are staggered, smoke generated during burning of the mosquito coil can be discharged through the smoke discharge hole 34, and the mosquito repelling effect is achieved; when the mosquito-repellent incense needs to be extinguished, the knob shaft 32 is rotated, so that the smoke exhaust hole 34 is completely shielded by the baffle 33, and at the moment, the smoke exhaust hole 34 is in a closed state, so that oxygen in the middle cover 2 is gradually lacked, and the mosquito-repellent incense can be slowly and automatically extinguished; meanwhile, in order to improve the placing stability of the mosquito-repellent incense, the longitudinal support rod 51 can be inserted into the longitudinal support rod hole 5 at the corresponding position, so that the longitudinal support rod 51 can support the mosquito-repellent incense, and the mosquito-repellent incense is prevented from shaking and easily breaking when people kick and touch the mosquito-repellent incense during walking; when the mosquito incense supporting device 23 and the longitudinal support rod 51 are not used, the mosquito incense can be directly placed on the main transverse strip 21 and the auxiliary transverse strip 22; the burnt mosquito-repellent incense can fall into the ash collecting tray 12 on the bottom surface of the chassis 1 for automatic collection through the gap between the main horizontal bar 21 and the auxiliary horizontal bar 22 and the gap between two adjacent auxiliary horizontal bars 22; because the other end of the pressure lever 36 is directly contacted with the mosquito-repellent incense, and a plurality of notches 38 are uniformly distributed on the opening at the other end of the pressure lever 36 along the circumferential direction, the contact area with the mosquito-repellent incense can be reduced, and the full combustion of the mosquito-repellent incense is facilitated; when the cover is not used for a long time or after use is finished, the clamping pins 42 on the hemispherical outer cover 4 can be respectively inserted into the clamping pin grooves 44 at corresponding positions, so that external dust and water are prevented or reduced from entering the middle cover 2 to affect subsequent use.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A safe fire prevention mosquito-repellent incense dish which characterized in that: comprises a chassis (1), the top surface of the chassis (1) is open, a middle cover (2) is movably arranged on the opening of the top surface of the chassis (1), the middle cover (2) is a circular cylindrical body with two open ends, a main transverse bar (21) and a plurality of auxiliary transverse bars (22) are horizontally and fixedly arranged in the middle cover (2), the auxiliary transverse bars (22) are symmetrically distributed at two sides of the main transverse bar (21), two adjacent auxiliary transverse bars (22) are distributed in parallel at intervals, a mosquito-repellent incense supporting device (23) is arranged on the main transverse bar (21), an upper cover (3) is movably arranged on the middle cover (2), the upper cover (3) comprises an upper outer cover body (31), the upper outer cover body (31) is movably connected with the middle cover (2), the upper outer cover body (31) is a circular cylindrical body with an open bottom surface, a knob shaft (32) is movably arranged on the top surface of the upper outer cover body (31) in a penetrating manner, and one end of the knob shaft (32) is positioned outside the upper outer cover body (31, a plurality of baffles (33) are uniformly distributed on the peripheral wall of the other end of the knob shaft (32) along the circumferential direction, a plurality of smoke discharge holes (34) with the same number as the baffles (33) are uniformly distributed on the top surface of the upper outer cover body (31) along the circumferential direction, the shapes and the sizes of the smoke discharge holes (34) and the baffles (33) are matched, a pressure rod groove (35) is arranged on the end surface of the other end of the knob shaft (32), a pressure rod (36) is movably arranged in the pressure rod groove (35), the positions of the pressure rod (36) and the mosquito coil supporting device (23) are vertically corresponding, a return spring (37) is fixedly arranged between one end of the pressure rod (36) and the bottom in the pressure rod groove (35), the other end of the pressure rod (36) is positioned outside the pressure rod groove (35), the other end of the pressure rod (36) is in an open shape, a plurality of notches (38) are uniformly distributed on the opening of the other end of the pressure rod (36) along, the outer fixed cover of the round face end of hemisphere dustcoat (4) is equipped with sealing washer (41), along a plurality of card feet (42) of circumference equipartition on the bottom surface of sealing washer (41), be provided with ring shape step groove (43) on the top surface of last dustcoat body (31), sealing washer (41) and the big or small looks adaptation of ring shape step groove (43), be provided with card foot groove (44) with card foot (42) one-to-one on ring shape step groove (43), and card foot (42) activity respectively inserts to the card foot groove (44) of relevant position in.

2. A safe and fire-proof mosquito-repellent incense coil as claimed in claim 1, wherein: the mosquito-repellent incense supporting device (23) comprises a supporting column (231), an upper through hole (211) is arranged on the top surface of a main transverse bar (21), a lower through hole (212) is arranged on the bottom surface of the main transverse bar (21), the upper through hole (211) and the lower through hole (212) are coaxial, the upper through hole (211) is communicated with the lower through hole (212), the diameter of the lower through hole (212) is larger than that of the upper through hole (211), the supporting column (231) is arranged in the upper through hole (211) in a sliding manner, one end of the supporting column (231) movably penetrates through the upper through hole (211) to the lower through hole (212), the other end of the supporting column (231) is positioned outside the upper through hole (211), a supporting sheet (232) is fixedly arranged at the other end of the supporting column (231), a limiting disc (233) is fixedly arranged at one end of the supporting column (231), the outer peripheral wall of the limiting disc (233) is contacted with the inner wall, one end of the spring (234) is in contact with the limiting disc (233), the other end of the spring (234) is fixedly provided with an adjusting bolt (235), one end, far away from the upper through hole (211), of the inner wall of the lower through hole (212) is provided with an internal thread, the adjusting bolt (235) is in threaded connection with the lower through hole (212), and the pressing rod (36) and the supporting column (231) are coaxial.

3. A safe and fire-proof mosquito-repellent incense coil as claimed in claim 1, wherein: a plurality of longitudinal support rod holes (5) are arranged on the top surface of the auxiliary transverse bar (22) at intervals along the length direction, and longitudinal support rods (51) are movably arranged in the longitudinal support rod holes (5).

4. A safe and fire-proof mosquito-repellent incense coil as claimed in claim 1, wherein: the bottom surface in the chassis (1) is provided with a dust collecting groove (11), and a dust collecting disc (12) is movably clamped in the dust collecting groove (11).

5. A safe and fire-proof mosquito-repellent incense coil as claimed in claim 1, wherein: the mosquito-repellent incense supporting device (23) is positioned in the middle of the main transverse bar (21), and the top surfaces of the main transverse bars (21) on the two sides of the mosquito-repellent incense supporting device (23) are both arc-shaped.

6. A safe and fire-proof mosquito-repellent incense coil as claimed in claim 1, wherein: the knob shaft (32) is in interference fit with the top surface of the upper outer cover body (31).

7. A safe and fire-proof mosquito-repellent incense coil as claimed in claim 1, wherein: the opening inner wall of chassis (1) top surface is internal thread form, and the one end of well lid (2) is external thread form, and the other end of well lid (2) is internal thread form, and threaded connection between the one end of well lid (2) and the opening of chassis (1) top surface, goes up the bottom surface opening of enclosing cover body (31) and is external thread form, and goes up threaded connection between the bottom surface opening of enclosing cover body (31) and the other end of well lid (2).