CN202109224U

CN202109224U - Varifocal flashlight

Info

Publication number: CN202109224U
Application number: CN2011202245749U
Authority: CN
Inventors: 王善宗
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-29
Filing date: 2011-06-29
Publication date: 2012-01-11
Anticipated expiration: 2021-06-29

Abstract

The utility model provides a varifocal flashlight which comprises a lamp cap, a lamp tube provided with an LED (light-emitting diode) lamp and a handle with a battery case, wherein the lamp cap is fixed at the front end of the lamp tube; the lamp tube is fixed at the front end of the handle; a spiral groove is arranged on the outer surface of the lamp tube; an outer magnet is arranged in the spiral groove and convexly extends to the outside of the spiral groove; a focusing tube is sleeved outside the lamp tube; an axial groove matched with the outer magnet is arranged on the inner surface of the focusing tube; a lens column is sleeved inside the lamp tube and is positioned in front of the LED lamp; a convex lens sheet is fixed inside the lens column; and an inner magnet attracted with the outer magnet is embedded on the wall of the lens column. The varifocal flashlight has the characteristics that the focal length is simple and convenient to adjust, and the lamp holder can not fall off from the lamp tube when the focal length is adjusted.

Description

Varifocal flashlight

Technical field

The utility model relates to the flashlight technical field, especially relates to a kind of varifocal flashlight.

Background technology

Existing flashlight especially uses the flashlight of LED lamp as light source, is fixed focal length mostly, uses inconvenience.Even if the flashlight of adjustable focal length, also modes that adopt internal and external threads to cooperate more.In when focusing, lamp holder is prone to revolve to take off from the lamp tube cause inconvenience, and screw thread damages easily, causes and can't focus.Therefore be necessary existing flashlight is improved.

The utility model content

To the deficiency that above-mentioned prior art exists, the purpose of the utility model provides a kind of varifocal flashlight, and it is simple, convenient that it has focus adjustment, the characteristics that lamp holder can not come off from the lamp tube during focusing.

To achieve these goals, the technical scheme that the utility model adopted is: varifocal flashlight, comprise lamp holder, be provided with the LED lamp the lamp tube, be provided with the handle of battery case; Lamp holder is fixed on the front end of lamp tube, and the lamp tube is fixed on the front end of handle, and the outer surface of lamp tube is provided with helical groove; Be provided with external magnet in the helical groove, external magnet protrudes out to outside the helical groove, and the outside of lamp tube is with focusing drum; The inner surface of focusing drum is provided with the axial notch that matches with external magnet, and the inside of lamp tube is with lens post, and lens post is positioned at the place ahead of LED lamp; The internal fixation of lens post has convex lens sheet, is inlaid with the internal magnet that attracts mutually with external magnet on the wall of lens post.

Said axial notch and helical groove respectively are three that evenly are provided with around circumference, and external magnet and internal magnet respectively are three.

Said external magnet is cylindrical.

Said battery case inside is provided with 18250 cell containing cavities that mutual perforation is an one, No. 5 cell containing cavities and No. 7 cell containing cavities simultaneously.

Said lamp holder is through the lamp tube that is threaded.

After adopting said structure; The utility model is compared the advantage that is had with prior art: 1, the utility model relies on the cooperation of axial notch and helical groove; And attracting each other between internal magnet and the external magnet control convex lens sheet and accomplish along with sliding before and after rotating, and with respect to the existing mode of taking threaded adjusting, convex lens sheet moves steadily, the position is accurate; The situation that lamp holder rocks can not appear; Make the focusing operation highly stable, accurate, whole operation only need be rotated focusing drum, and focus adjustment is simple, convenient.2, focusing process is without the turn lamp holder, and lamp holder can not come off from the lamp tube when therefore focusing.3, battery case is applied widely, and can pack into the battery of different model of battery case uses.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified:

Fig. 1 is the overall structure sketch map (broken section) of the utility model embodiment;

Fig. 2 is the three-dimensional decomposition texture sketch map of the utility model embodiment;

Fig. 3 is the sectional structure sketch map of lens post;

Fig. 4 is the sectional structure sketch map of focusing drum;

Fig. 5 is the sectional structure sketch map of battery case.

The specific embodiment

The following stated is merely the preferred embodiment of the utility model, does not therefore limit the protection domain of the utility model.

Embodiment; See that Fig. 1 is to shown in Figure 5: varifocal flashlight; Comprise that the lamp holder 1 that is fixed with transparent glass sheet 11, the lamp tube 4, the inside that are provided with LED lamp 43 are provided with the handle 50 of battery case 5; Lamp holder 1 is through being threaded on the lamp tube 4, and lamp tube 4 is fixed on the front end of handle 50, and switch 55 is located at the rear end of handle 50.The outside of lamp tube 4 is with focusing drum 3, and the inside of lamp tube 4 is with lens post 2, and lens post 2 is positioned at the place ahead of LED lamp 43, and the internal fixation of lens post 2 has convex lens sheet 21.The outer surface of lamp tube 4 offers three helical grooves 41 uniformly around circumference, is equipped with an external magnet 42 in every helical groove 41, and external magnet 42 is cylindrical and protrudes out to outside the helical groove 41.The inner surface of focusing drum 3 offers three axial notches 31 that match with external magnet 42 uniformly around circumference, on the wall of lens post 2 around circumference be inlaid with uniformly three with the external magnet 42 corresponding internal magnets that attract mutually 22.

Battery case 5 inside are provided with 51, No. 5 cell containing cavities 52 of 18250 cell containing cavities and No. 7 cell containing cavities 53 that mutual perforation is an one simultaneously; The bottom of 51, No. 5 cell containing cavities 52 of 18250 cell containing cavities and No. 7 cell containing cavities 53 is equipped with conductive electrode 54, is provided with necessary circuit between conductive electrode 54, LED lamp 43 and the switch 55.

Operation principle: between every axial notch 31 and the helical groove 41 corresponding an external magnet 42 is arranged all with it, external magnet 42 simultaneously and axial notch 31, helical groove 41, internal magnet 22 match.During focusing, rotation focusing drum 3, axial notch 31 drives external magnets 42 and moves along helical groove 41, attracts internal magnet 22 movement therewith in the time of external magnet 42 motions, thus drive lens post 2 is rotating and is seesawing.Like this, just formed focusing after the distance of convex lens sheet 21 and LED lamp 43 changes.

Flashlight is widely-used at present, and other structure is identical with prior art with principle, repeats no more.

Claims

1. varifocal flashlight, comprise lamp holder (1), be provided with LED lamp (43) lamp tube (4), be provided with the handle (50) of battery case (5), lamp holder (1) is fixed on the front end of lamp tube (4); Lamp tube (4) is fixed on the front end of handle (50); It is characterized in that: the outer surface of said lamp tube (4) is provided with helical groove (41), is provided with external magnet (42) in the helical groove (41), and external magnet (42) protrudes out to outside the helical groove (41); The outside of lamp tube (4) is with focusing drum (3); The inner surface of focusing drum (3) is provided with the axial notch (31) that matches with external magnet (42), and the inside of lamp tube (4) is with lens post (2), and lens post (2) is positioned at the place ahead of LED lamp (43); The internal fixation of lens post (2) has convex lens sheet (21), is inlaid with the internal magnet (22) that attracts mutually with external magnet (42) on the wall of lens post (2).

2. varifocal flashlight according to claim 1 is characterized in that: said axial notch (31) and helical groove (41) are three that evenly are provided with around circumference respectively, and external magnet (42) and internal magnet (22) respectively are three.

3. varifocal flashlight according to claim 1 is characterized in that: said external magnet (42) is for cylindrical.

4. varifocal flashlight according to claim 1 is characterized in that: said battery case (5) inside is provided with 18250 cell containing cavities (51), No. 5 cell containing cavities (52) and No. 7 cell containing cavities (53) that mutual perforation is an one simultaneously.

5. varifocal flashlight according to claim 1 is characterized in that: said lamp holder (1) is through the lamp tube (4) that is threaded.