Intrinsically safe mining lamp

Abstract

An intrinsically-safe mining lamp is provided with a front cover with a built-in light source and a lamp cup and a bottom cover with an outer charging electrode and a key, the interior of a lamp cavity defined by the front cover and the bottom cover is fully sealed relative to the exterior according to the IP67 standard, a fully-sealed battery cavity is defined by a battery protection cover and the bottom cover in the bottom cover, and a battery is solidified and arranged in the battery cavity. The joint of the periphery of the battery protection cover and the bottom cover is welded through ultrasonic waves, the outer side of the joint of the periphery of the battery cavity is sealed with sealant, and the inner space of the battery cavity is filled with solidification glue. According to the mining lamp, the battery part is completely sealed and isolated from the internal structure, the intrinsic safety requirement is met, meanwhile, the technical performance of cruising ability, size and weight maintains the highest standard of the prior art, and the mining lamp is of great significance for mining lamp equipment carried about in underground operation.

Description

Technical Field

[0001] The utility model relates to lighting equipment, in particular to an industrial and mining lamp. Background Art

[0002] Mining lamps are equipment carried by personnel in mines. Due to the gas environment that may be encountered underground and the limited escape routes, the safety performance of the equipment itself is very high. The new generation of mining lamps IP67 / IP68 in the prior art refers to the waterproof performance of the equipment itself, not the safety; currently, lithium batteries with light weight and high energy density are commonly used. Since lithium batteries themselves have unsafe factors that may explode in extreme situations, it is difficult for mining lamps as a whole to meet the requirements of intrinsic safety. Therefore, the old model of mining lamps uses batteries and has better safety performance, but it has been eliminated due to its heavy weight and inconvenience in use. If the new generation of mining lamps in the prior art want to maintain the existing high performance of small size, light weight and long battery life, there is no precedent that can achieve intrinsic safety. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide an intrinsically safe mining lamp while maintaining the high performance technical indicators of existing mining lamps.

[0004] The intrinsically safe mining lamp is provided with a front cover with a built-in light source and a lamp cup, and a bottom cover with an external charging electrode and a button, wherein the bottom cover has a built-in battery, and is characterized in that: the front cover and the bottom cover are tightly connected, the interior of the lamp cavity formed by the front cover and the bottom cover is waterproof and sealed relative to the outside, and the battery protection cover is again enclosed with the bottom cover to form a fully sealed battery cavity inside the bottom cover, the battery is built into the battery cavity, the connection between the battery protection cover and the bottom cover is ultrasonically welded, the outside of the connection around the battery cavity is sealed with sealant, and the internal space of the battery cavity is filled with solidified glue.

[0005] Furthermore, the battery, together with the battery assembly circuit board with a welding protector, are sealed in the battery cavity.

[0006] As a preferred embodiment, the battery cavity is provided with a unique threading opening connected to the outside world, and the threading opening is filled with solidified glue; a limiting plate perpendicular to the side wall is provided on the inner side of the threading opening and integrated with the battery protection cover, and the limiting plate is provided in the middle of the length direction of the battery protection cover, and is used to clamp the battery and space and limit the battery assembly circuit board.

[0007] In the sealing structure of the key: a key extending out of the bottom cover is arranged above the lamp cavity, an electronic component switch is fixedly arranged below the key, and the key and the switch are respectively isolated outside and inside the lamp cavity.

[0008] As an embodiment of the above-mentioned key, a key ring is fixedly provided around the key and the bottom cover for limiting the key from falling outward, a rod-shaped protrusion for pressing the switch is integrally provided on the inner side of the key, an elastic key lining is provided between the key and the switch, and the edge of the key lining is sealed and squeezed between the key ring and the bottom cover.

[0009] The utility model completely seals and isolates the battery part from the internal structure, achieving the requirement of intrinsic safety. At the same time, the technical performance of battery life, volume and weight maintains the highest standards of the existing technology. It is a significant technological advancement for portable mining lamps for underground operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a front view of the structural schematic diagram of the utility model.

[0011] Figure 2 yes Figure 1 AA section view.

[0012] Figure 3 yes Figure 1 Top view of the .

[0013] Figure 4 yes Figure 1 Rear view of.

[0014] Figure 5 It is the front view of the battery protection cover structure.

[0015] Figure 6 yes Figure 5 BB cross-sectional view.

[0016] Figure 7 yes Figure 5 CC cross-sectional view.

[0017] Figure 8 It is a three-dimensional diagram of the battery protection cover.

[0018] In the figure: 1-front cover, 2-bottom cover, 3-lamp cup, 4-battery cavity, 5-button, 6-button ring, 7-button lining, 8-switch, 9-main circuit board, 10-battery assembly circuit board, 11-battery, 12-battery protection cover, 13-sealing ring, 14-insert, 15-external charging electrode, 16-protector, 17-threading port, 18-limiting plate. DETAILED DESCRIPTION

[0019] The following is a further description of the present invention in conjunction with the accompanying drawings and embodiments: The directions involved in the following description are based on the use state. Figure 1-4As shown in the figure, the intrinsically safe mining lamp is provided with a front cover 1 and a bottom cover 2. The front cover 1 has a main circuit board 9 welded with an LED light source. The front end of the front cover 1 is a transparent lens sealed and fixed with the front cover 1. A lamp cup 3 is placed behind the lens. The bottom of the lamp cup 3 is the LED light source. At present, the LED light source of resin curing package is generally used, which will not produce discharge and exposure. The main component in the bottom cover 2 is a battery 11. The outer rear side of the bottom cover 2 is provided with a plug-in 14 for temporary wearing on a hat, shoulder strap, etc. A charging electrode 15 is provided on the outside of the bottom cover 2 to charge the internal battery 11; the bottom cover 2 is provided with a button 5 to control the light source lighting / off and other functions. Other functions of the mining lamp can also be completed through the chip built into the main circuit board 9 and the button 5 or other human-machine interaction components. The front cover 1 and the bottom cover 2 are buckled and fastened, and the edges are completely sealed all around. A sealing ring 13 is also inserted between the front cover 1 and the bottom cover 2. After being tightened by the screws, the lamp cavity formed by the internal space of the front cover 1 and the bottom cover 2 is sealed by the sealing ring 13 and is isolated from the outside world, meeting the IP67 or IP68 waterproof isolation standards.

[0020] The key component involved in the safety issue is the battery 11. The lithium battery currently used is difficult to be replaced by other batteries in terms of capacity and price, and is also widely used. Lithium batteries have the advantage of high energy density, but even if rechargeable lithium batteries use relatively safe lithium iron phosphate or similar materials, it is still impossible to eliminate the possibility of combustion in extreme conditions.

[0021] In order to prevent battery and circuit short circuit, overcurrent, overvoltage, overtemperature and other problems that may occur during the charging and discharging process of the battery 11, eliminate the potential safety hazards caused thereby, and at the same time protect the safety of the lamp and maintain a longer service life, a battery assembly circuit board 10 is connected in parallel with the battery 11, and a protector 16 is sealed and welded on the battery assembly circuit board 10.

[0022] In the embodiment, the overall outline size of the mining lamp is less than 8cm, and the thickness of the bottom cover and the front cover shell reaches 1mm, which can have a strong overall pressure resistance. Although the mining lamp itself is very small, the battery it carries is even smaller, the energy stored is not large, and the probability of being subjected to strong extrusion is extremely low, in order to prevent the internal short circuit and overheating of the battery that may occur in extreme cases, such as strong external impact and extremely high temperature, and the short-term release of a large amount of energy, in order to greatly reduce the impact of the battery combustion on the outside at this time, the battery 11 and the battery assembly circuit board 10 are completely sealed with flame retardant and heat-insulating materials, and the air is exhausted as much as possible in this space, solidified into a space that is isolated again inside the lamp cavity. In this way, the safety performance of mining lamps is greatly improved.

[0023] The battery protection cover 12 and the bottom cover 2 are fully sealed to form a battery cavity 4 that is isolated again in the lamp cavity. The battery 11 is fixedly built into the battery cavity 4, and the battery assembly circuit board 10 with the welding protector 16 is sealed in the battery cavity 4 together. The connection between the battery protection cover 12 and the bottom cover 2 is ultrasonically welded, and the outer side of the connection around the battery cavity 4 is sealed again with sealant, and the internal space of the battery cavity 4 is filled with flame-retardant and high-temperature resistant solidifying glue. The solidifying glue material can be epoxy resin, which can meet the above-mentioned properties and has the ability to facilitate liquid infusion and wrap all contents to solidify into a solid.

[0024] A battery protection cover 12 has a structure as follows: Figure 5-8 As shown, the size of the battery protection cover 12 is slightly larger than the battery 11. The battery cavity 4 surrounded by the battery protection cover 12 and the bottom cover 2 can just fit the battery 11. A raised portion with a threading port 17 is raised in the middle. The raised portion can just fit the battery assembly circuit board 10 with the protector 16. The lead wires of the battery assembly circuit board 10 are connected to the external charging electrode 15 or the main circuit board 9 through the threading port 17. The threading port 17 is the only connection between the battery cavity 4 and the outside world, and is used to pass the lead wires. In the finished product, the battery cavity 4 and the threading port 17 are filled with solidified glue.

[0025] To facilitate production, a limit plate 18 is provided on the inner side of the threading opening 17, which is integrated with the battery protection cover 12 and basically perpendicular to the side wall. The limit plate 18 is provided in the middle of the length direction of the battery protection cover 12 and is parallel to the length direction of the battery protection cover 12. It is used to clamp the battery 11 during production and installation, and can temporarily maintain the stability of the battery 11 during the installation process, and space and limit the battery assembly circuit board 10, so that the protector 16 welded on the battery assembly circuit board 10 is separated from the battery 11, and even if the temperature and shape of the protector 16 change, it will not directly affect the battery 11.

[0026] A button 5 extending out of the bottom cover 2 is provided above the lamp cavity, and an electronic component switch 8 is fixedly provided below the button 5. The structure of the button 5 can adopt the following structure to fully seal the internal switch 8 from the outside, and the button 5 and the switch 8 are respectively isolated outside and inside the lamp cavity.

[0027] As an embodiment of the above-mentioned key 5 structure, Figure 2As shown, a key ring 6 fixed to the outer side wall of the bottom cover 2 is provided around the side of the key 5. The key 5 is a truncated cone with a small top and a large bottom. The key ring 6 surrounds the key 5 to limit the key 5 from coming out and can only be pressed downward. At the same time, in order to provide a vertical pressing space for the key, the key ring 6 and the outer side wall of the bottom cover 2 enclose a key cavity. A rod-shaped protrusion is integrally provided on the inner side of the key 5, and the switch 8 is pressed by the rod-shaped protrusion. The pressing switch 8 is fixed on the platform extending from the bottom side wall of the bottom cover. An elastic key lining 7 is provided in the key cavity between the key 5 and the switch 8. The key lining 7 can be made of rubber materials such as silica gel. The edge of the key lining 7 is sealed and squeezed between the key ring 6 and the bottom cover 2, so that the key 5 and the switch 8 are completely isolated by the key lining 7 in a continuous and sealed manner. When the key 5 is pressed, the rod-shaped protrusion moves down with the key lining 7 to press the micro-moving component of the switch 8, while the switch 8 itself is not connected to the outside world. The rubber material of the key lining 7 has both wear resistance and elasticity, and can also seal and isolate.

[0028] Therefore, the overall internal lamp cavity of the industrial and mining lamp is isolated from the outside world, meeting the IP67 or IP 68 standards, and the overall performance is pressure-resistant and non-deformable. In addition, the battery 11 is isolated and sealed in the battery cavity 4 again in the lamp cavity. The battery cavity 4 is filled with flame-retardant and high-temperature resistant solidifying glue and the air is excluded. Even if the battery burns, it will be isolated and will not affect the outside of the equipment, meeting the requirements of intrinsic safety.

[0029] During production, the bottom cover 2 is first installed with the button 5 and the external charging electrode 15. In the battery part, the battery 11 with the nickel strip welded and the associated battery assembly circuit board 10 are first placed in the battery cavity 4. The battery 11 itself and the battery assembly circuit board 10 are clamped and separated by the limit plate 18 in the battery cavity 4. The state is stable and does not shake. The external lead of the battery assembly circuit board 10 is led out from the threading port 17. The liquid solidifying glue with good fluidity is injected, left to stand or vibrated regularly from the threading port 17 for multiple cycles until the solidifying glue fills the threading port 17. After stabilization, it can be cured by heating. Finally, the front cover 1 with the main circuit board 9 and the lamp cup 3 installed is fastened to the bottom cover 2 with screws through the sealing ring 13 to complete the installation. The basic charging and discharging and switch lighting function operations of the industrial and mining lamp are not significantly different from the prior art.

[0030] The above embodiments can be used in combination as needed, and the specific implementation details do not affect the innovative protection scope of the utility model.

Claims

1. An intrinsically safe mining lamp, comprising a front cover (1) with a built-in light source and a lamp cup (3), and a bottom cover (2) with an external charging electrode (15) and a button (5), wherein the bottom cover (2) has a built-in battery (11), characterized in that: The front cover (1) and the bottom cover (2) are tightly connected. The interior of the lamp cavity formed by the front cover (1) and the bottom cover (2) is waterproof and sealed relative to the outside. The battery protection cover (12) is again enclosed with the bottom cover (2) to form a fully sealed battery cavity (4). The battery (11) is built into the battery cavity (4). The connection between the battery protection cover (12) and the bottom cover (2) is ultrasonically welded. The outer side of the connection around the battery cavity (4) is sealed with sealant. The internal space of the battery cavity (4) is filled with solidified glue.

2. The intrinsically safe mining lamp according to claim 1, characterized in that: The battery (11) and the battery assembly circuit board (10) with the welding protector (16) are sealed together in the battery cavity (4).

3. The intrinsically safe mining lamp according to claim 2, characterized in that: The battery cavity (4) is provided with a single threading opening (17) communicating with the outside, and the threading opening (17) is filled with solidified glue; a limiting plate (18) perpendicular to the side wall is provided on the inner side of the threading opening (17) and is integrated with the battery protection cover (12); the limiting plate (18) is provided in the middle of the length direction of the battery protection cover (12) and is used to clamp the battery (11) and to space and limit the battery assembly circuit board (10).

4. The intrinsically safe mining lamp according to claim 1, characterized in that: A button (5) extending out of the bottom cover (2) is provided above the lamp cavity, and a switch (8) is fixedly provided below the button (5); the button (5) and the switch (8) are respectively isolated outside and inside the lamp cavity.

5. The intrinsically safe mining lamp according to claim 4, characterized in that: A key ring (6) is fixedly provided around the key (5) and the bottom cover (2) for preventing the key (5) from slipping outwards; a rod-shaped protrusion for a switch (8) is integrally provided on the inner side of the key (5); an elastic key lining (7) is provided between the key (5) and the switch (8); and the edge of the key lining (7) is sealed and squeezed between the key ring (6) and the bottom cover (2).

Images