Universal serial bus (USB) rechargeable flashlight

Abstract

The USB charging flashlight comprises a lamp tail, a lamp body and a lamp holder which are connected in sequence. The lamp tail comprises a tail cover outer barrel and a tail cover inner barrel, the tail cover inner barrel comprises a first inner shell and a second inner shell, the PCB is arranged between the first inner shell and the second inner shell, a USB interface is installed on the side, facing the first inner shell, of the PCB, an integrated positioning sleeve is arranged on the first inner shell in the radial direction, the end of the USB interface extends into the positioning sleeve in a matched mode, and the USB interface is arranged in the positioning sleeve. A through hole is correspondingly machined in the tail cover outer cylinder, the positioning sleeve is inserted into the through hole, and a screw cap is arranged on the outer side of the tail cover outer cylinder and used for covering the USB interface. According to the flashlight structure, the tail cover inner barrel of a split structure is used for limiting the PCB, the positioning sleeve is arranged on the first inner shell to guide and position the USB interface, when the USB interface is assembled with the tail cover outer barrel, the positioning sleeve is directly inserted into the through hole in the tail cover outer barrel in a matched mode, and the USB interface is not prone to inclining, accurate in positioning and convenient and fast to assemble.

Description

Technical Field

[0001] The utility model relates to a USB charging flashlight. Background Art

[0002] A flashlight is a portable lighting tool, which is widely used in outdoor activities, emergency rescue, night work, household use and other scenarios. Its structure is simple, operation is convenient, and it has strong lighting ability, which is one of the indispensable tools in people's daily life. Most of the existing flashlight structures use a USB interface for charging. The USB interface is built into the positioning hole of the housing. The USB interface needs to be snapped into the positioning hole. The processing accuracy requirements of the positioning hole are relatively high. There is a tight fit structure between the USB interface and the positioning hole. When assembling, the insertion direction of the USB interface is perpendicular to its own central axis. The USB interface is easily tilted by the radial extrusion force, affecting subsequent use and aesthetics, and the assembly is inconvenient. Content of the Utility Model

[0003] Aiming at the deficiencies in the above problems, the utility model provides a USB charging flashlight.

[0004] To achieve the above object, the utility model provides a USB charging flashlight, which includes a lamp tail, a lamp body and a lamp head connected in sequence;

[0005] The lamp tail includes an outer tail cover cylinder and an inner tail cover cylinder arranged inside the outer tail cover cylinder. The inner tail cover cylinder includes a first inner housing and a second inner housing with a split structure. A PCB circuit board is arranged between the first inner housing and the second inner housing. A USB interface is installed on one side of the PCB circuit board facing the first inner housing. A positioning sleeve integrated in the radial direction is arranged on the first inner housing. The end of the USB interface is fitted and extended into the positioning sleeve. A through hole is correspondingly processed on the outer tail cover cylinder, and the positioning sleeve is inserted into the through hole. A rotary cover is arranged on the outside of the outer tail cover cylinder to cover the USB interface.

[0006] As a further improvement of the utility model, a compression spring is arranged at one end of the PCB circuit board close to the lamp body, and the other end of the compression spring is pressed against the negative electrode of the rechargeable battery inside the lamp body. A push switch is arranged at the end of the PCB circuit board far from the lamp body, and a key cap is arranged at the end of the inner tail cover cylinder to cooperate with the push switch.

[0007] As a further improvement of the utility model, a limiting convex edge extends radially on the inner side wall of the inner tail cover cylinder close to the lamp body. One end of the inner tail cover cylinder abuts against the limiting convex edge. The key cap is pressed against the end of the inner tail cover cylinder through a locking sleeve, and the locking sleeve is threadedly connected with the outer tail cover cylinder.

[0008] As a further improvement of the present utility model, a sealing ring Ⅰ is embedded on the outer peripheral surface of the locking sleeve, and the sealing ring Ⅰ abuts against the inner wall surface of the screw cap.

[0009] As a further improvement of the present utility model, limiting grooves are machined on the end faces of the first inner housing and the second inner housing facing each other, limiting blocks are correspondingly machined on both sides of the PCB circuit board, and the limiting blocks are fitted and clamped into the limiting grooves.

[0010] As a further improvement of the present utility model, external threads are machined on the outer peripheral surface of the outer cylinder of the tail cap on the side away from the lamp body, which are matched with the internal threads inside the screw cap. On the side of the USB interface close to the lamp body, a sealing ring is embedded on the outer peripheral surface of the outer cylinder of the tail cap, and the sealing ring abuts against the inner wall surface of the screw cap.

[0011] As a further improvement of the present utility model, the inner cylinder of the tail cap is made of a transparent material, and a charging indicator light is provided on the PCB circuit board.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The structure of the flashlight uses the split inner cylinder of the tail cap to limit the PCB circuit board, and a positioning sleeve is provided on the first inner housing to form guiding and positioning for the USB interface. When the USB interface is assembled with the outer cylinder of the tail cap, the positioning sleeve is directly inserted into the through hole on the outer cylinder of the tail cap, and the USB interface does not contact the through hole. Therefore, the USB interface is not prone to tilting, the positioning is accurate, and the assembly is convenient; the positioning sleeve and the first inner housing are of an integral structure, which is convenient for processing, and the whole is made of a transparent material. Combined with the charging indicator light on the PCB circuit board, the charging indicator light lights up during charging and forms a light transmission effect through the positioning sleeve, and the charging indication effect is obvious. Description of the Drawings

[0014] Figure 1 is a cross-sectional view of a USB rechargeable flashlight of the present utility model;

[0015] Figure 2 is an exploded view of the lamp tail 1;

[0016] Figure 3 is a three-dimensional structural view after unscrewing the screw cap 13 on the lamp tail 1.

[0017] In the figure: 1. Lamp tail; 11. Outer cylinder of the tail cover; 111. Through hole; 112. External thread; 113. Limiting flange; 114. Sealing ring; 12. Inner cylinder of the tail cover; 121. First inner housing; 122. Second inner housing; 123. Positioning sleeve; 124. Limiting groove; 13. Screw cap; 131. Internal thread; 14. PCB circuit board; 141. Limiting block; 15. USB interface; 16. Press switch; 17. Button cap; 18. Locking sleeve; 181. Sealing ring Ⅰ; 19. Compression spring; 2. Lamp body; 21. Rechargeable battery; 3. Lamp head. Detailed implementation manner

[0018] As Figure 1-2 shown, a USB rechargeable flashlight according to the present utility model includes a lamp tail 1, a lamp body 2 and a lamp head 3 which are connected in sequence;

[0019] The lamp tail 1 includes an outer cylinder 11 of the tail cover and an inner cylinder 12 of the tail cover provided inside the outer cylinder 11 of the tail cover. The inner cylinder 12 of the tail cover is made of a transparent material. The inner cylinder 12 of the tail cover includes a first inner housing 121 and a second inner housing 122 which are in a split structure. The PCB circuit board 14 is arranged between the first inner housing 121 and the second inner housing 122. Limiting grooves 124 are machined on the end faces of the first inner housing 121 and the second inner housing 122 facing each other. Limiting blocks 141 are correspondingly machined on both sides of the PCB circuit board 14. The limiting blocks 141 are fitted and clamped into the limiting grooves 124. A USB interface 15 is installed on the side of the PCB circuit board 14 facing the first inner housing 121. A charging indicator light (not shown in the figure) is provided on the PCB circuit board 14. A positioning sleeve 123 integrated in the radial direction is provided on the first inner housing 121. The end of the USB interface 15 is fitted and extended into the positioning sleeve 123. A through hole 111 is correspondingly machined on the outer cylinder 11 of the tail cover. The positioning sleeve 123 is inserted into the through hole 111. A screw cap 13 is provided on the outside of the outer cylinder 11 of the tail cover to cover the USB interface 15. An external thread 112 machined on the outer peripheral surface of the outer cylinder 11 of the tail cover on the side of the USB interface 15 away from the lamp body 2 is matched with the internal thread 131 on the inner side of the screw cap 13. A sealing ring 114 is embedded and installed on the outer peripheral surface of the outer cylinder 11 of the tail cover on the side of the USB interface 15 close to the lamp body 2. The sealing ring 114 abuts against the inner wall surface of the screw cap 13. A compression spring 19 is provided at one end of the PCB circuit board 14 close to the lamp body 2. The other end of the compression spring 19 is pressed against the negative electrode of the rechargeable battery 21 in the lamp body 2. A press switch 16 is provided at the end of the PCB circuit board 14 away from the lamp body 2. A button cap 17 is provided at the end of the inner cylinder 12 of the tail cover to cooperate with the press switch 16. A limiting flange 113 is radially extended on the inner side wall of the inner cylinder 12 of the tail cover close to the lamp body 2. One end of the inner cylinder 12 of the tail cover abuts against the limiting flange 113. The button cap 17 is pressed against the end of the inner cylinder 12 of the tail cover through a locking sleeve 18. The locking sleeve 18 is threadedly connected with the outer cylinder 11 of the tail cover. A sealing ring Ⅰ181 is embedded and installed on the outer peripheral surface of the locking sleeve 18. The sealing ring Ⅰ181 abuts against the inner wall surface of the screw cap 13.

[0020] The structure of this flashlight uses the inner cylinder of the split tail cap to limit the PCB circuit board, and a positioning sleeve is provided on the first inner housing to form guiding and positioning for the USB interface. When the USB interface is assembled with the outer cylinder of the tail cap, the positioning sleeve directly fits into the through hole on the outer cylinder of the tail cap, and the USB interface does not contact the through hole. Therefore, the USB interface is not easily tilted, the positioning is accurate, and the assembly is convenient; the positioning sleeve and the first inner housing are of an integral structure, which is convenient for processing, and the whole is made of a transparent material. Cooperating with the charging indicator light on the PCB circuit board, the charging indicator light lights up during charging and forms a light transmission effect through the positioning sleeve, and the charging indication effect is obvious.

[0021] When in specific use, for the convenience of understanding the present invention, it is described in conjunction with the accompanying drawings;

[0022] When assembling the lamp tail, the USB interface, the push switch and the compression spring are pre-installed on the PCB circuit board, and then the PCB circuit board is connected to the first inner housing in the inner cylinder of the tail cap. The end of the USB interface fits into the positioning sleeve on the first inner housing, and the limiting blocks on both sides of the PCB circuit board are snapped into the limiting grooves on the first inner housing. Then, the first inner housing with the PCB circuit board is inserted into the outer cylinder of the tail cap, and the positioning fit on the first inner housing extends into the through hole on the outer cylinder of the tail cap. Then, the second inner housing is inserted, and the first inner housing and the second inner housing form a complete inner cylinder of the tail cap. The PCB circuit board is placed between the first inner housing and the second inner housing, with accurate positioning and not easily misaligned. The inner end of the inner cylinder of the tail cap abuts against the limiting convex edge on the inner side of the outer cylinder of the tail cap. A key cap is installed at the outer end of the inner cylinder of the tail cap to cooperate with the push switch. The key cap is press-fitted at the end of the inner cylinder of the tail cap through a locking sleeve, and the locking sleeve is threadedly connected to the outer cylinder of the tail cap. Finally, a rotary cap is installed on the outer side of the outer cylinder of the tail cap through a threaded structure to cover the USB interface; after the lamp tail is assembled, it can be connected to the lamp body.

[0023] During charging, rotate the rotary cap to expose the USB interface. During the charging process, the charging indicator light on the PCB circuit board lights up and forms a light transmission effect through the positioning sleeve, and the charging indication effect is obvious.

[0024] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A USB rechargeable flashlight, characterized in that: It includes a lamp tail (1), a lamp body (2) and a lamp head (3) connected in sequence. The lamp tail (1) includes an outer tail cover cylinder (11) and an inner tail cover cylinder (12) arranged inside the outer tail cover cylinder (11). The inner tail cover cylinder (12) includes a first inner shell body (121) and a second inner shell body (122) which are of a split structure. A PCB circuit board (14) is arranged between the first inner shell body (121) and the second inner shell body (122). A USB interface (15) is installed on one side of the PCB circuit board (14) facing the first inner shell body (121). A positioning sleeve (123) is integrally arranged radially on the first inner shell body (121). The end of the USB interface (15) is fitted and extends into the positioning sleeve (123). A through hole (111) is correspondingly machined on the outer tail cover cylinder (11), and the positioning sleeve (123) is inserted into the through hole (111). A rotary cover (13) is arranged on the outer side of the outer tail cover cylinder (11) to cover the USB interface (15).

2. The USB rechargeable flashlight according to claim 1, wherein: A compression spring (19) is arranged at one end of the PCB circuit board (14) close to the lamp body (2). The other end of the compression spring (19) is pressed against the negative electrode of a rechargeable battery (21) inside the lamp body (2). A push switch (16) is arranged at the end of the PCB circuit board (14) far from the lamp body (2). A key cap (17) is arranged at the end of the inner tail cover cylinder (12) and is matched with the push switch (16).

3. The USB rechargeable flashlight according to claim 2, wherein: A limiting convex edge (113) extends radially on the inner side wall of the inner tail cover cylinder (12) close to the lamp body (2). One end of the inner tail cover cylinder (12) abuts against the limiting convex edge (113). The key cap (17) is pressed against the end of the inner tail cover cylinder (12) through a locking sleeve (18), and the locking sleeve (18) is threadedly connected with the outer tail cover cylinder (11).

4. The USB rechargeable flashlight according to claim 3, wherein: A sealing ring Ⅰ (181) is embedded and installed on the outer peripheral surface of the locking sleeve (18), and the sealing ring Ⅰ (181) abuts against the inner wall surface of the rotary cover (13).

5. A USB rechargeable flashlight according to claim 1, characterized in that: Limiting grooves (124) are machined on the end faces of the first inner shell body (121) and the second inner shell body (122) facing each other. Limiting blocks (141) are correspondingly machined on both sides of the PCB circuit board (14), and the limiting blocks (141) are fitted and clamped into the limiting grooves (124).

6. The USB rechargeable flashlight according to claim 1, wherein: External threads (112) are machined on the outer peripheral surface of the outer tail cover cylinder (11) on the side of the USB interface (15) far from the lamp body (2) and are matched with the internal threads (131) inside the rotary cover (13). A sealing ring (114) is embedded and installed on the outer peripheral surface of the outer tail cover cylinder (11) on the side of the USB interface (15) close to the lamp body (2), and the sealing ring (114) abuts against the inner wall surface of the rotary cover (13).

7. A USB rechargeable flashlight according to any one of claims 1-5, characterized in that: The inner tail cover cylinder (12) is made of a transparent material, and a charging indicator light is arranged on the PCB circuit board (14).

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