Self-extinguishing electric bicycle charger

Abstract

The utility model relates to the technical field of chargers, in particular to a self-extinguishing electric bicycle charger which comprises a shell. A power supply cavity is formed in the shell; a power supply module is arranged in the power supply cavity; a sucking pump is arranged at one end of the power supply cavity; a ventilation device is arranged at the other end of the power supply cavity; the ventilation device comprises a window frame arranged at the other end of the power supply cavity and a ventilation window penetrating through the middle of the window frame; a plurality of fan blades are hinged to the ventilation window in the height direction; the window frame is provided with a sliding groove in the height direction. A lifting frame is arranged in the sliding groove in a sliding manner; the lifting frame is provided with a blocking rod used for abutting against the bottom of the fan blade. And a thermal driving mechanism is arranged between the lifting frame and the window frame. According to the utility model, through the arrangement of the air pump and the thermal driving mechanism, when the charger is on fire, the charger can be sealed and air in the charger can be pumped out, so that the oxygen content in the power supply cavity is reduced, and the charger cannot continue to burn.

Description

Technical Field

[0001] The utility model relates to the technical field of chargers, in particular to a self-fire extinguishing electric bicycle charger. Background Art

[0002] As a convenient and environmentally friendly means of transportation, electric bicycles are widely used in daily travel. The popularity of electric bicycles has led to the widespread use of chargers. However, existing electric bicycle chargers have some safety hazards during use.

[0003] When an electric bicycle charger is working, the internal electronic components will generate a lot of heat. If this heat cannot be effectively dissipated, the temperature of the circuit board will be too high, which is easy to cause a fire. In addition, the widely used electric bicycle chargers generally lack the necessary fire extinguishing devices. When a fire occurs in the charger, the fire cannot be controlled in time, which is easy to cause a fire accident. Utility Model Content

[0004] The purpose of the utility model is to provide a self-extinguishing electric bicycle charger in view of the above-mentioned deficiencies in the prior art.

[0005] The purpose of the utility model is achieved through the following technical solutions: a self-extinguishing electric bicycle charger, comprising a shell; a power cavity is provided in the shell; a power module is provided in the power cavity;

[0006] An air pump is provided at one end of the power cavity; a ventilation device is provided at the other end of the power cavity; the ventilation device comprises a window frame provided at the other end of the power cavity and a ventilation window penetrating the middle of the window frame; the ventilation window is hingedly provided with a plurality of fan blades along the height direction; when the ventilation window is closed, the bottom of the upper fan blade of two adjacent fan blades abuts against the top of the lower fan blade;

[0007] The window frame is provided with a sliding groove along the height direction; the sliding groove is slidably provided with a lifting frame; the lifting frame is provided with a blocking rod for abutting against the bottom of the fan blade; a thermal drive mechanism is provided between the lifting frame and the window frame.

[0008] The utility model is further configured that the thermal drive mechanism includes a spring; the spring is arranged between the bottom of the sliding groove and the bottom of the lifting frame.

[0009] The utility model is further configured that the thermal drive mechanism also includes an inclined surface arranged on the inner side of the sliding groove; from the top of the inclined surface to the bottom of the inclined surface, the distance between the inclined surface and the side surface of the lifting frame gradually increases.

[0010] The utility model is further configured such that the thermal drive mechanism also includes a accommodating groove arranged on the side of the lifting frame; a heat-expanding body is provided at the bottom of the accommodating groove; a driving pin is telescopically provided at the end of the accommodating groove; the heat-expanding body is connected to the driving pin; and the driving pin is used to abut against the inclined surface.

[0011] The utility model is further configured that both sides of the lifting frame are provided with accommodating grooves; and both sides of the window frame are provided with sliding grooves.

[0012] The utility model is further configured as follows: an aluminum foil wrapping layer is provided in the power cavity; an airbag cavity is formed between the aluminum foil wrapping layer and the shell; and an air hole communicating with the airbag cavity is penetrated through the shell.

[0013] The utility model is further configured that aluminum foil wrapping layers are provided on both sides of the power cavity.

[0014] The utility model is further configured that the shell includes a bottom shell and a top cover; the power cavity is formed between the bottom shell and the top cover.

[0015] The utility model is further configured that a sealing strip is provided at the bottom of the fan blade.

[0016] The beneficial effects of the utility model are as follows: the utility model can seal the charger and extract the air inside the charger when the charger catches fire by arranging an air extraction pump and a heat driving mechanism, thereby reducing the oxygen content inside the power cavity and preventing the charger from continuing to burn. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the utility model from another perspective;

[0020] Figure 3 It is a cross-sectional view of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the utility model after the top cover is hidden;

[0022] Figure 5 It is a schematic diagram of the structure of the ventilation device of the utility model at normal temperature;

[0023] Figure 6It is a cross-sectional view of the ventilation device of the utility model when overheated;

[0024] Figure 7 yes Figure 6 A partial enlarged view of the middle A area;

[0025] Among them: 11. bottom shell; 12. top cover; 13. power cavity; 14. power module; 2. vacuum pump; 3. window frame; 31. sliding groove; 32. spring; 4. ventilation window; 41. fan blade; 5. lifting frame; 51. blocking rod; 6. inclined surface; 7. accommodating groove; 71. heat expansion body; 72. driving pin; 8. aluminum foil wrapping layer; 81. airbag cavity; 82. air hole. DETAILED DESCRIPTION

[0026] The utility model is further described in conjunction with the following embodiments.

[0027] Depend on Figures 1 to 7 It can be seen that the self-extinguishing electric bicycle charger described in this embodiment includes a housing; a power cavity 13 is provided in the housing; a power module 14 is provided in the power cavity 13;

[0028] An air pump 2 is provided at one end of the power cavity 13; a ventilation device is provided at the other end of the power cavity 13; the ventilation device comprises a window frame 3 provided at the other end of the power cavity 13 and a ventilation window 4 penetrating the middle of the window frame 3; the ventilation window 4 is hingedly provided with a plurality of blades 41 along the height direction; when the ventilation window 4 is closed, the bottom of the upper blade 41 of two adjacent blades 41 abuts against the top of the lower blade 41;

[0029] The window frame 3 is provided with a sliding groove 31 along the height direction; the sliding groove 31 is slidably provided with a lifting frame 5; the lifting frame 5 is provided with a blocking rod 51 for abutting against the bottom of the fan blade 41; a thermal drive mechanism is provided between the lifting frame 5 and the window frame 3.

[0030] Specifically, the self-extinguishing electric bicycle charger described in this embodiment, when the charger temperature is normal, Figure 5 As shown, the lifting frame 5 is located at the top of the sliding groove 31. At this time, the position of the blocking rod 51 corresponds to the middle of the fan blade 41 or the top of the fan blade 41, and the blocking rod 51 cannot prevent the fan blade 41 from rotating normally; therefore, in this state, when the vacuum pump 2 is working, the fan blade 41 is rotated open by the airflow, so that the air inside the charger can circulate and take away the heat of the power module 14.

[0031] When a charger catches fire, the heat of the charger rises sharply. Figure 6As shown, the lifting frame 5 is driven by the heat drive mechanism to move to the bottom of the sliding groove 31, and at this time, the blocking rod 51 is abutted against the bottom of the fan blade 41, so that the bottom of the fan blade 41 located above is pressed against the top of the fan blade 41 located below, and because the fan blade 41 is inclined relative to the window frame 3, the blocking rod 51, the bottom of the upper fan blade 41 and the top of the lower fan blade 41 can be firmly pressed against each other, thereby closing and sealing the ventilation window 4. At this time, under the action of the vacuum pump 2, the vacuum pump 2 extracts the air inside the power cavity 13, thereby reducing the oxygen content inside the power cavity 13, so that the charger cannot continue to burn.

[0032] In the self-extinguishing electric bicycle charger described in this embodiment, the thermal drive mechanism includes a spring 32; the spring 32 is arranged between the bottom of the sliding groove 31 and the bottom of the lifting frame 5. In the self-extinguishing electric bicycle charger described in this embodiment, the thermal drive mechanism also includes an inclined surface 6 arranged inside the sliding groove 31; from the top of the inclined surface 6 to the bottom of the inclined surface 6, the distance between the inclined surface 6 and the side of the lifting frame 5 gradually increases. In the self-extinguishing electric bicycle charger described in this embodiment, the thermal drive mechanism also includes a receiving groove 7 arranged on the side of the lifting frame 5; a heat-expanding body 71 is provided at the bottom of the receiving groove 7; a driving pin 72 is provided at the end of the receiving groove 7 for telescopic movement; the heat-expanding body 71 is connected to the driving pin 72; the driving pin 72 is used to abut against the inclined surface 6; wherein the heat-expanding body 71 can be a memory metal or a graphite material, etc.

[0033] Specifically, in the self-extinguishing electric bicycle charger described in this embodiment, when the temperature of the charger is normal, the driving pin 72 retracts into the accommodating groove 7, and under the action of the spring 32, the lifting frame 5 is located at the top of the sliding groove 31. At this time, the position of the blocking rod 51 corresponds to the middle of the fan blade 41 or the top of the fan blade 41, and the blocking rod 51 cannot prevent the fan blade 41 from rotating normally; therefore, in this state, when the vacuum pump 2 is working, the fan blade 41 is rotated open by the airflow, so that the air inside the charger circulates and takes away the heat of the power module 14.

[0034] When the charger catches fire, the heat of the charger rises sharply, causing the heat-expanding body 71 to expand, thereby pushing the driving pin 72 out of the accommodating groove 7 and pressing the driving pin 72 against the inclined surface 6. As the distance between the inclined surface 6 and the side of the lifting frame 5 gradually increases, the driving pin 72 descends along the inclined surface 6, thereby driving the lifting frame 5 to overcome the action of the spring 32 and move to the bottom of the sliding groove 31. At this time, the blocking rod 51 abuts against the bottom of the fan blade 41, so that the bottom of the upper fan blade 41 abuts against the top of the lower fan blade 41, and since the fan blade 41 is inclined relative to the window frame 3, the blocking rod 51, the bottom of the upper fan blade 41 and the top of the lower fan blade 41 can be firmly pressed together, thereby closing and sealing the ventilation window 4. At this time, under the action of the vacuum pump 2, the vacuum pump 2 extracts the air inside the power cavity 13, thereby reducing the oxygen content inside the power cavity 13, so that the charger cannot continue to burn.

[0035] In the self-extinguishing electric bicycle charger described in this embodiment, both sides of the lifting frame 5 are provided with accommodating grooves 7; both sides of the window frame 3 are provided with sliding grooves 31. Through the above arrangement, the lifting frame 5 can be stably lifted and lowered.

[0036] In the self-extinguishing electric bicycle charger described in this embodiment, an aluminum foil wrapping layer 8 is provided in the power cavity 13; an air bag cavity 81 is formed between the aluminum foil wrapping layer 8 and the shell; and an air hole 82 communicating with the air bag cavity 81 is penetrated through the shell.

[0037] Specifically, when the charger catches fire, the ventilation window 4 is closed and sealed. At this time, under the action of the vacuum pump 2, the vacuum pump 2 extracts the air inside the power cavity 13. At the same time, due to the pressure drop inside the power cavity 13, the aluminum foil wrapping layer 8 can expand toward the middle of the power cavity 13 under the action of the air pressure difference, thereby quickly discharging the air inside the power cavity 13.

[0038] In the self-extinguishing electric bicycle charger described in this embodiment, aluminum foil wrapping layers 8 are provided on both sides of the power cavity 13. The above arrangement can further speed up the exhaust of air inside the power cavity 13.

[0039] In the self-extinguishing electric bicycle charger described in this embodiment, the housing comprises a bottom housing 11 and a top cover 12; the power cavity 13 is formed between the bottom housing 11 and the top cover 12. The above arrangement facilitates assembly and disassembly of the housing.

[0040] In the self-extinguishing electric bicycle charger described in this embodiment, a sealing strip is provided at the bottom of the fan blade 41. The above arrangement can ensure the sealing between two adjacent fan blades 41.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A self-extinguishing electric bicycle charger, characterized in that: It comprises a shell; a power cavity (13) is provided in the shell; a power module (14) is provided in the power cavity (13); An air pump (2) is provided at one end of the power cavity (13); a ventilation device is provided at the other end of the power cavity (13); the ventilation device comprises a window frame (3) provided at the other end of the power cavity (13) and a ventilation window (4) penetrating the middle of the window frame (3); the ventilation window (4) is hingedly provided with a plurality of blades (41) along a height direction; when the ventilation window (4) is closed, the bottom of the upper blade (41) of two adjacent blades (41) abuts against the top of the lower blade (41); The window frame (3) is provided with a sliding groove (31) along the height direction; a lifting frame (5) is slidably provided in the sliding groove (31); the lifting frame (5) is provided with a blocking rod (51) for abutting against the bottom of the fan blade (41); and a thermal drive mechanism is provided between the lifting frame (5) and the window frame (3).

2. A self-extinguishing electric bicycle charger according to claim 1, characterized in that: The thermal drive mechanism comprises a spring (32); the spring (32) is arranged between the bottom of the sliding groove (31) and the bottom of the lifting frame (5).

3. A self-extinguishing electric bicycle charger according to claim 2, characterized in that: The thermal drive mechanism further comprises an inclined surface (6) arranged inside the sliding groove (31); from the top of the inclined surface (6) to the bottom of the inclined surface (6), the distance between the inclined surface (6) and the side surface of the lifting frame (5) gradually increases.

4. A self-fire extinguishing electric bicycle charger according to claim 3, characterized in that: The thermal drive mechanism also includes a receiving groove (7) arranged on the side of the lifting frame (5); a heat-expanding body (71) is arranged at the bottom of the receiving groove (7); a driving pin (72) is telescopically arranged at the end of the receiving groove (7); the heat-expanding body (71) is connected to the driving pin (72); and the driving pin (72) is used to abut against the inclined surface (6).

5. A self-extinguishing electric bicycle charger according to claim 4, characterized in that: Both sides of the lifting frame (5) are provided with accommodating grooves (7); and both sides of the window frame (3) are provided with sliding grooves (31).

6. A self-extinguishing electric bicycle charger according to claim 1, characterized in that: An aluminum foil wrapping layer (8) is provided in the power cavity (13); an airbag cavity (81) is formed between the aluminum foil wrapping layer (8) and the shell; and an air hole (82) communicating with the airbag cavity (81) is provided through the shell.

7. A self-extinguishing electric bicycle charger according to claim 1, characterized in that: Aluminum foil wrapping layers (8) are provided on both sides of the power cavity (13).

8. The self-fire extinguishing electric bicycle charger according to claim 1, characterized in that: The housing comprises a bottom shell (11) and a top cover (12); the power cavity (13) is formed between the bottom shell (11) and the top cover (12).

9. The self-fire extinguishing electric bicycle charger according to claim 1, characterized in that: A sealing strip is provided at the bottom of the fan blade (41).

Images