Antistatic flame-retarded focusing mine lamp

Abstract

The present invention relates to an anti-static flame-retardand adjustable focal length miner's lamp, It is characterized by that in the lamp head a lever ring is set, one end of said lever ring is hinged to a fulcrum bar, in the opening hole of intermediate position of lever ring a pin of bracket cylinder is set, on another side of lever ring a rectangular groove is cut, on the switch sleeve of switch shaft a focussing contact is eccentrically fixed, the focussing contact can be inserted into the rectangular groove and can implement easy slide fit, so that the turning of switch shaft can change the upper and lower position of reflector fixed on the bracket cylinder to regulate focal length.

Description

Technical field: [0001] The invention relates to a lamp capable of providing a substitute when one luminous body is damaged, in particular to a miner's lamp with double filaments and adjustable focus. Background technique: [0002] In the underground operation of coal mines, the miner's lamp is one of the necessary tools for the operator. Early miner's lamps used a lamp head with a single filament structure. The lamp head only needs to be equipped with a fixed reflector to correspond to its fixed focusing requirements. However, When the filament of this type of miner's lamp fails, its lighting function will be completely lost, which not only affects the operation, but may even endanger the personal safety of the operator. In response to the above problems, the industry has developed a lamp cap structure with a pair of filaments. The circuit schematic diagram is as follows Figure 9 As shown, the lamp cap is provided with a main filament and a sub-filament, the main and sub-f...

AI Technical Summary

Problems solved by technology

[0002] In the underground operation of coal mines, the miner's lamp is one of the necessary tools for the operator. Early miner's lamps used a lamp head with a single filament structure. The lamp head only needs to be equipped with a fixed reflector to correspond to its fixed focusing requirements. However, When the filament of this type of miner's lamp fails, its lighting function will be completely lost, which not only affects the operation, but may even endanger the personal safety of the operator

In response to the above problems, the industry has developed a lamp cap structure with a pair of filaments. The circuit schematic diagram is as follows Figure 9 As shown, the lamp cap is provided with a main filament and a sub-filament, the main and sub-filaments are connected in parallel to the power circuit, and the switch controls the connection or cut-off of the two respectively. In terms of structure, the main and sub-filaments are located on the longitudinal axis of the reflector , and is arranged in the upper and lower positions, and a reflector is fixed on the lamp head shell. The focusing focal length of the reflector is designed according to the best light-gathering requirements of the main filament. The miner's lamp has a good lighting effect. When the main filament fails, the switch can be switched on to the auxiliary filament power supply, so that the miner's lamp can still have the lighting function, which solves the major defect that the lighting function cannot be maintained after the failure of the single filament lamp holder. However, the above Due to the difference in the upper and lower positions of the main and auxiliary filaments in the longitudinal axis of the reflector, the focal length of the fixed reflector and the auxiliary filament do not match each other at this time, so the lighting effect is not good, and it still cannot meet the needs of downhole operations. demand; for this reason, the industry continues to develop an adjustable focus miner's lamp, which is characterized in that the reflector is no longer fixed on the lamp housing, but can move up and down along its own longitudinal axis, thereby changing the focal length of the reflector. In order to adapt to the different positions of the main and auxiliary filaments in the upper and lower positions, so as to achieve the best light-gathering effect, so the lighting effect of the miner's lamp will be improved

The structure of the above-mentioned adjustable focal length has many types, such as the gear type, that is, through the rotation of the adjusting knob, the gear fixed on the shaft and the transmission wheel train drive the ring gear fixed on the reflector bracket, so that the reflector moves along the The inclined slideway (spiral shape) fixed on the lamp head slides up and down during rotation to realize its focus adjustment function, but its component shape is complicated and its workmanship is poor, which not only increases the production cost, but also its maintenance is extremely inconvenient ;Another adjustable distance structure is the offset steel wire type. In this structure, a horizontal shaft is installed on the lamp housing. One end of the shaft is connected with a switch knob, and a rotary sleeve is set on the shaft. There is a steel wire, which extends through the slot of the reflector bracket. When the knob is rotated, the eccentrically arranged steel wire can drive the reflector to move up and down along the longitudinal axis to realize its focal length adjustment function. This kind of structure has many components and Complicated, the transmission accuracy and stability of the flexible steel wire drive bracket slot are poor, making it difficult to guarantee the reliability of the adjustment, and it is difficult to meet the high reliability requirements of the miner's lamp

[0003] In addition, the existing above-mentioned various types of miner's lamps have no sealing structure except that the upper cover of the battery is fixed by bolts and tanks. Dust and water in the mining environment can easily enter the battery tank, which reduces the safety performance of the miner's lamp and shortens the working life of the miner's lamp. Extended the service life of the miner's lamp;

[0004] The existing battery tank or cover is made of plastic material, which is prone to sparks due to static electricity accumulation, which may endanger the safety of coal mines; Happens from time to time, endangering production safety

Images