CN103062629B - Flashlight - Google Patents

Abstract

The invention discloses a flashlight, which comprises a barrel body made of insulating material, a tail cap and a light source part are respectively arranged at two ends of the barrel body, the light source part includes a light source circuit board and a light source arranged on the light source circuit board, and is adjacent to the barrel body The inner wall is provided with a conductive sleeve, and the center of the side of the light source circuit board facing the inside of the cylinder body is provided with a positive pole spring, and a spiral involute negative pole spring is provided around the positive pole spring, and the end of the negative pole spring with a larger diameter is in contact with the conductive sleeve. connected, the positive spring communicates with the light source; the tail cap is provided with a tail cap circuit board, and the end face of the tail cap circuit board facing the light source is provided with a tail cap negative spring and a shrapnel electrically connected to the tail cap negative spring welded on the tail cap circuit board , the shrapnel abuts against the conductive sleeve. Installing a conductive sleeve on the inner wall of the non-conductive cylinder, on the one hand, reduces the cost compared with the use of an all-metal structure, and on the other hand, prevents the cylinder from being oxidized in the air and causing poor circuit insulation or poor conductivity.

Description

flashlight

【Technical field】

The invention relates to a lighting device, in particular to a flashlight.

【Background technique】

Traditional flashlights generally use metal barrels to achieve conductive functions.

The positive and negative poles of the light source are respectively connected to the positive and negative poles of the drive circuit PCB board. The PCB board is fixed on the LED cooling frame. The cooling frame has threads and can be screwed into the lamp holder to fix it. The positive pole of the PCB board is connected to the battery through a spring (or thimble) The positive pole is connected (that is, the positive pole of the battery is turned on and remains connected in both working and non-working states), the negative pole of the PCB board is connected to the LED heat sink, and the negative pole is guided to the lower end of the LED heat sink. The negative pole of the battery is at the tail. It is in contact with the tail cap spring, the tail cap spring and the barrel are connected by threads, and the negative electrode is introduced into the barrel (Note: the barrel body, the lamp cap, and the LED cooling frame are all metal parts, such as aluminum and gold), and the barrel and the lamp cap pass through The screw teeth are connected and fixed, and the end surface of the cylinder is conductive. Through the contact between the end surface and the cooling frame, the negative pole of the battery is finally guided to the circuit board to realize the power supply circuit.

In the above-mentioned prior art, it is necessary to ensure that the body of the flashlight is a metal part for conducting electricity, and at the same time, the conductive circuit must be reliable. But because the commonly used metal aluminum of the muff body is easily oxidized in the air, an insulating layer is formed, which makes the conduction poor, and the metal shell is more expensive.

【Content of invention】

In view of this, it is necessary to provide a flashlight with a non-conductive barrel.

Adopt the following technical solutions:

A flashlight, comprising a barrel body made of insulating material, tail caps and light source parts are respectively arranged at both ends of the barrel body, the light source part includes a light source circuit board and a light source arranged on the light source circuit board, adjacent to the The inner wall of the barrel body is provided with a conductive sleeve, and the center of the side of the light source circuit board facing the inside of the barrel body is provided with a positive spring, and the periphery of the positive spring is provided with a spiral involute negative spring, and the negative spring The end with a larger diameter is in contact with the conductive sleeve, and the positive spring is connected to the light source; the tail cover is provided with a tail cover circuit board, and the end surface of the tail cover circuit board facing the light source is provided with The negative pole spring of the tail cap and the shrapnel welded on the circuit board of the tail cap and electrically connected with the negative pole spring of the tail cap, the shrapnel abuts against the conductive sleeve. Preferably: the conductive sleeve is made integrally with the barrel body by injection molding.

Preferably: the conductive sleeve has a certain taper, and the inner wall of the barrel body is adapted to it, and the end of the inner wall of the barrel body with a smaller inner diameter is provided with an annular step near the end of the conductive sleeve, so that The end of the conductive sleeve with a smaller inner diameter is turned outwards to cover the annular step.

Preferably: the conductive sleeve is coated on the inner wall of the cylinder body.

Preferably: there are at least two elastic pieces arranged evenly.

Preferably: a battery is also included, the negative pole of the battery abuts against the negative pole spring of the tail cover, and the positive pole abuts against the positive pole spring.

Preferably: the axial length of the conductive sleeve is consistent with the length of the battery.

Installing a conductive sleeve on the inner wall of the non-conductive cylinder, on the one hand, reduces the cost compared with the use of an all-metal structure, and on the other hand, prevents the cylinder from being oxidized in the air and causing poor circuit insulation or poor conductivity.

Moreover, the combined body can be directly used as a part. When in use, the battery can be directly inserted into the body, so there is no need to worry about parts falling off during maintenance.

【Description of drawings】

Fig. 1 is the sectional schematic diagram of flashlight of the present invention;

Fig. 2 is the explosion diagram of the flashlight of the present invention;

Figure 3 is a partial enlarged view of the tail cap.

【Detailed ways】

Now carry out further explanation in conjunction with accompanying drawing.

As shown in FIGS. 1 and 2 , the flashlight 10 includes a light source part 100 , a conductive sleeve 300 , a barrel body 400 and a tail cap 500 . The light source part 100 and the tail cap 500 are respectively located at two ends of the barrel body 400 , and the conductive sleeve 300 is disposed adjacent to the inner wall of the barrel body 400 .

The light source part 100 includes a light source circuit board 120 and a light source 140 disposed thereon. The light source 140 is closely surrounded by a cooling frame 160 , the cooling frame 160 is screwed with the lamp head barrel 180 , and the light source circuit board 120 and the light source 140 are fixed in the lamp head barrel 180 , and the lamp head barrel 180 and the barrel body 400 are connected by threads.

One side of the light source circuit board 120 is provided with a light source 140, and the center of the other side (facing the inside of the cylinder body 400) is protruded with a positive pole spring 170 electrically connected to the light source 140, and a negative pole spring 150 that is spirally involute is provided around the periphery. The end of the spring 150 with a smaller diameter is disposed on the light source circuit board 120 . After the light source unit 100 and the cylinder body 400 are installed, the end of the negative electrode spring 150 with a larger diameter abuts against the conductive sleeve 300 .

The barrel body 400 is made of insulating material, and the conductive sleeve 300 is made of conductive material such as stainless steel, which can be integrally made with the barrel body 400 by injection molding, or can be made separately and used together with the barrel body 400 . The double-layer structure of the cylinder body 400 and the conductive sleeve 300, on the one hand, reduces the cost compared with the all-metal structure, and on the other hand, prevents the circuit insulation or poor conduction caused by the oxidation of the cylinder body 400 in the air.

The tail cap 500 is connected to the barrel body 400 through threads. The tail cap 500 is provided with a tail cap circuit board 520 facing the cylinder body 400 . As shown in FIG. 1 and FIG. 3 , a tail cap positive spring 540 protrudes from the middle of the tail cap circuit board 520 , and a spiral tail cap negative spring 560 is disposed around the periphery. An elastic piece 580 is welded on the edge of the tail cover circuit board 510 , and the elastic piece 580 is electrically connected with the tail cover negative electrode spring 560 through the tail cover circuit board 520 . After the tail cap 500 is installed on the cylinder body 400 , the elastic piece 580 abuts against the conductive sleeve 300 . For uniform stress and conduction, preferably at least two elastic pieces 580 are evenly arranged.

In order to prevent the conductive sleeve 300 from slipping, the end of the conductive sleeve 300 close to the light source part 100 is formed in a tapered shape with an opening gradually increasing, and the structure of the sleeve 400 is adapted to it. The other end of the sleeve 400 is provided with an annular step 420 , and the end of the conductive sleeve 300 is turned outward to form a flange, covering the annular step 420 . In this way, the tapered structure of the conductive sleeve 300 can prevent it from slipping from the end with a smaller opening, and the flange structure can prevent it from slipping from the end with a larger opening. This kind of structure needs to be made by injection molding. At this time, the conductive sleeve 300 and the sleeve 400 become a whole, and the two cannot be disassembled from any end, and destructive disassembly must be done to dismantle them.

As another embodiment, the conductive sleeve 300 may also be used as a coating, coated on the inner wall of the cylinder body 400 .

After the battery 200 is assembled, the axial length of the battery 200 is consistent with the axial length of the conductive sleeve 300 , so that the positive pole of the battery 200 is in contact with the positive pole spring 170 , and the negative pole is in contact with the negative pole spring 560 of the tail cap. The whole circuit is:

Battery 200 negative pole-tail cap negative spring 560-tail cap circuit board 520-shrapnel 580-conductive sleeve 300-negative spring 150-light source 140;

Battery 200 positive pole - positive pole spring 170 - light source 140 .

The cylinder body 400 with the conductive sleeve 300 can be directly used as a part. When in use, the battery can be directly inserted into the cylinder body. There is no need to worry about the problem that the parts will fall off during maintenance.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (6)

1. A flashlight, comprising a cylinder body made of insulating material, a tail cap and a light source portion are respectively arranged at two ends of the cylinder body, the light source portion comprises a light source circuit board and a light source arranged on the light source circuit board, its It is characterized in that: a conductive sleeve is provided adjacent to the inner wall of the cylinder body, a positive electrode spring is protruded from the center of the side of the light source circuit board facing the inside of the cylinder body, and a spiral involute negative electrode is provided around the periphery of the positive electrode spring spring, the end of the negative spring with a larger diameter is in contact with the conductive sleeve, and the positive spring is connected to the light source; the tail cover is provided with a tail cover circuit board, and the tail cover circuit board faces the The end surface of the light source is provided with a tail cap negative spring and a shrapnel welded on the tail cap circuit board and electrically connected to the tail cap negative spring, and the shrapnel is in contact with the conductive sleeve; The conductive sleeve has a certain taper, and the inner wall of the barrel body is adapted to it. The end of the inner wall of the barrel body with a smaller inner diameter is provided with an annular step near the end of the conductive sleeve. The conductive sleeve The end of the barrel with a smaller inner diameter is turned outwards to cover the annular step. 2. The flashlight according to claim 1, wherein the conductive sleeve is made integrally with the barrel body by injection molding. 3. The flashlight according to claim 1, wherein the conductive sleeve is coated on the inner wall of the barrel. 4. The flashlight according to claim 1, wherein there are at least two shrapnels arranged evenly. 5 . The flashlight according to claim 1 , further comprising a battery, the negative pole of the battery abuts against the negative pole spring of the tail cover, and the positive pole abuts against the positive pole spring. 6. The flashlight according to claim 5, wherein the axial length of the conductive sleeve is consistent with the length of the battery.