EP2149739A1 - Flashlight - Google Patents
Flashlight Download PDFInfo
- Publication number
- EP2149739A1 EP2149739A1 EP09006052A EP09006052A EP2149739A1 EP 2149739 A1 EP2149739 A1 EP 2149739A1 EP 09006052 A EP09006052 A EP 09006052A EP 09006052 A EP09006052 A EP 09006052A EP 2149739 A1 EP2149739 A1 EP 2149739A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp support
- light
- adjustment member
- flashlight
- conducting component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
- F21L4/00—Electric lighting devices with self-contained electric batteries or cells
- F21L4/005—Electric lighting devices with self-contained electric batteries or cells the device being a pocket lamp
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
- F21L4/00—Electric lighting devices with self-contained electric batteries or cells
- F21L4/02—Electric lighting devices with self-contained electric batteries or cells characterised by the provision of two or more light sources
- F21L4/022—Pocket lamps
- F21L4/027—Pocket lamps the light sources being a LED
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/80—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with pins or wires
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/89—Metals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
- F21V14/025—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources in portable lighting devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to a flashlight, more particularly one, which is structured in such a manner that waste heat produced from shining of the light source can be efficiently conducted away, and the user is allowed to adjust a position of a focal point of light emitted from the light source.
- High-power light emitting diodes have been developed, and gain popularity for household illumination and emergency illumination. Flashlights are among the common emergency illumination devices.
- Such emergency flashlights have relatively high intensity owing to the high-power light emitting diodes.
- the high-power light emitting diodes will produce a large amount of waste heat when they are shining.
- the light emitting diodes will become very hot and less efficient, and can even get damaged if the waste heat isn't effectively dissipated.
- commercially available flashlights can't be adjusted in the position of the focal point of light emitted therefrom according to the users' needs.
- a flashlight in accordance with an embodiment of the present invention includes a lamp support, an electric light-generating mechanism in the lamp support, a covering member around the lamp support, a barrel body joined on the covering member, a power supply held in the barrel body, and an adjustment member.
- the adjustment member is threadedly joined in the lamp support, and can be turned to adjust a position of a focal point of light emitted from a light source of the light-generating mechanism.
- Front and rear heat-conducting components are positioned on front and rear ends of the light-generating mechanism respectively, and they contact the lamp support and the barrel body respectively; when the light source is shining, heat produced by the electric light-generating mechanism will be conducted away from the front heat-conducting component to the lamp support as well as from the rear heat-conducting component to the barrel body. Therefore, the light source is prevented from being damaged by the heat produced from it continuing shining for an extended length of time.
- a flashlight of the present invention includes a lamp support 1, an electric light generating mechanism 2, a front heat-conducting component 3, a rear heat-conducting component 4, an adjustment member 5 for adjusting a position of a focal point of light emitted from a light source, a barrel body 6, a power supplying mechanism 7, and a covering member 8.
- the lamp support 1 has a light-reflecting cup 11, and a joining part 12;
- the light-reflecting cup 11 is substantially in the shape of a hom, and adjoins a front end of the joining part 12, and it further communicates with the joining part 12;
- the joining part 12 has a threaded portion 122 on a rear end thereof, and a locating groove 121 on the front end.
- the electric light-generating mechanism 2 is held in the joining part 12 of the lamp support 1, and includes a circuit board 21, and a light source 22 joined on the circuit board 21; the circuit board 21 has a controlling circuit thereon; the light source 22 is a light emitting diode.
- the front heat-conducting component 3 is a metallic spring, and is positioned in the joining part 12 of the lamp support 2 with one end thereof being held in the locating groove 121 of the joining part 12, and the other end contacting the circuit board 21 of the electric light-generating mechanism 2 so as to bias the circuit board 21 towards a rear end of the lamp support 1.
- the rear heat-conducting component 4 is a metallic spring, and it is propped against the focal distance adjustment member 5 at a front end, and contacts the barrel body 6 at a rear end thereof.
- the adjustment member 5 is like a ring.
- the adjustment member 5 has a threaded portion 51, and an annular groove 52 an outer circumferential side thereof.
- the adjustment member 5 is threadedly joined on the threaded portion 122 of the rear portion of the lamp support 1 at the threaded portion 51 thereof. Therefore, the front heat-conducting component 3 makes the circuit board 21 of the electric light-generating mechanism 2 constantly contact the adjustment member 5.
- the front end of the rear heat-conducting component 4 is embedded in the annular groove 52 of the adjustment member 5.
- the barrel body 6 is hollow, and has a button switch 61 fitted on a rear end; the button switch 61 is electrically connected to the power supply mechanism 7 as well as the controlling circuit on the circuit board 21 of the electric light-generating mechanism 2 to turn on or turn off the light source 22 of the electric light-generating mechanism 2.
- the power supplying mechanism 7 is held in the barrel body 6 to supply electricity to the electric light-generating mechanism 2.
- the covering member 8 is positioned around the light-reflecting cup 11 of the lamp support 1, and joined on a front end of the barrel body 6; thus, the lamp support 1 and the electric light-generating mechanism 2 are held in the covering member 8 and the barrel body 6.
- the adjustment member 5 can be turned to change the position of the electric light-generating mechanism 2 in relation to the lamp support 1 so as to adjust the position of the focal point of light emitted from the light source 22 of the electric light-generating mechanism 2 after the barrel body 6 and the covering member 8 have been separated, and the lamp support 1 taken out; when the adjustment member 5 is turned, the electric light-generating mechanism 2 will move relative to the lamp support 1 together with the adjustment member 5.
- heat produced by the electric light-generating mechanism 2 will be conducted away from the front heat-conducting component 3 to the lamp support 1 as well as from the rear heat-conducting component 4 to the barrel body 6.
- heat produced from working of the electric light-generating mechanism 2 can be efficiently dissipated so as not to cause damage or reduce the service life of the light source 22.
- the adjustment member 5 has two gaps 53 on a rear end thereof, which faces the rear heat-conducting component 4; thus, a suitable tool can be moved to turn the adjustment member 5 after having been engaged in the gaps 53.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
Description
- The present invention relates to a flashlight, more particularly one, which is structured in such a manner that waste heat produced from shining of the light source can be efficiently conducted away, and the user is allowed to adjust a position of a focal point of light emitted from the light source.
- High-power light emitting diodes (LED) have been developed, and gain popularity for household illumination and emergency illumination. Flashlights are among the common emergency illumination devices.
- Such emergency flashlights have relatively high intensity owing to the high-power light emitting diodes. However, the high-power light emitting diodes will produce a large amount of waste heat when they are shining. The light emitting diodes will become very hot and less efficient, and can even get damaged if the waste heat isn't effectively dissipated. Moreover, commercially available flashlights can't be adjusted in the position of the focal point of light emitted therefrom according to the users' needs.
- Therefore, it is a main object of the present invention to provide an improvement on a flashlight to overcome the above problems.
- A flashlight in accordance with an embodiment of the present invention includes a lamp support, an electric light-generating mechanism in the lamp support, a covering member around the lamp support, a barrel body joined on the covering member, a power supply held in the barrel body, and an adjustment member. The adjustment member is threadedly joined in the lamp support, and can be turned to adjust a position of a focal point of light emitted from a light source of the light-generating mechanism. Front and rear heat-conducting components are positioned on front and rear ends of the light-generating mechanism respectively, and they contact the lamp support and the barrel body respectively; when the light source is shining, heat produced by the electric light-generating mechanism will be conducted away from the front heat-conducting component to the lamp support as well as from the rear heat-conducting component to the barrel body. Therefore, the light source is prevented from being damaged by the heat produced from it continuing shining for an extended length of time.
- The present invention will be better understood by referring to the accompanying drawings, wherein:
-
Fig. 1 is a fragmentary exploded perspective view of the present invention, -
Fig. 2 is a side view of the present invention, -
Fig. 3 is a partial sectional view of the present invention (1), and -
Fig. 4 is a partial sectional view of the present invention (2). - Referring to
Fig. 1 to Fig. 3 , preferred embodiment of a flashlight of the present invention includes alamp support 1, an electriclight generating mechanism 2, a front heat-conductingcomponent 3, a rear heat-conductingcomponent 4, anadjustment member 5 for adjusting a position of a focal point of light emitted from a light source, abarrel body 6, apower supplying mechanism 7, and a coveringmember 8. - The
lamp support 1 has a light-reflectingcup 11, and a joiningpart 12; the light-reflectingcup 11 is substantially in the shape of a hom, and adjoins a front end of the joiningpart 12, and it further communicates with the joiningpart 12; the joiningpart 12 has a threadedportion 122 on a rear end thereof, and a locatinggroove 121 on the front end. - The electric light-
generating mechanism 2 is held in the joiningpart 12 of thelamp support 1, and includes acircuit board 21, and alight source 22 joined on thecircuit board 21; thecircuit board 21 has a controlling circuit thereon; thelight source 22 is a light emitting diode. - The front heat-conducting
component 3 is a metallic spring, and is positioned in the joiningpart 12 of thelamp support 2 with one end thereof being held in the locatinggroove 121 of the joiningpart 12, and the other end contacting thecircuit board 21 of the electric light-generating mechanism 2 so as to bias thecircuit board 21 towards a rear end of thelamp support 1. - The rear heat-conducting
component 4 is a metallic spring, and it is propped against the focaldistance adjustment member 5 at a front end, and contacts thebarrel body 6 at a rear end thereof. - The
adjustment member 5 is like a ring. Theadjustment member 5 has a threadedportion 51, and anannular groove 52 an outer circumferential side thereof. Theadjustment member 5 is threadedly joined on the threadedportion 122 of the rear portion of thelamp support 1 at the threadedportion 51 thereof. Therefore, the front heat-conductingcomponent 3 makes thecircuit board 21 of the electric light-generating mechanism 2 constantly contact theadjustment member 5. The front end of the rear heat-conductingcomponent 4 is embedded in theannular groove 52 of theadjustment member 5. - The
barrel body 6 is hollow, and has abutton switch 61 fitted on a rear end; thebutton switch 61 is electrically connected to thepower supply mechanism 7 as well as the controlling circuit on thecircuit board 21 of the electric light-generating mechanism 2 to turn on or turn off thelight source 22 of the electric light-generating mechanism 2. - The
power supplying mechanism 7 is held in thebarrel body 6 to supply electricity to the electric light-generating mechanism 2. - The covering
member 8 is positioned around the light-reflectingcup 11 of thelamp support 1, and joined on a front end of thebarrel body 6; thus, the lamp support 1 and the electric light-generating mechanism 2 are held in the coveringmember 8 and thebarrel body 6. - Referring to
Figs. 3 and4 , theadjustment member 5 can be turned to change the position of the electric light-generating mechanism 2 in relation to thelamp support 1 so as to adjust the position of the focal point of light emitted from thelight source 22 of the electric light-generating mechanism 2 after thebarrel body 6 and the coveringmember 8 have been separated, and thelamp support 1 taken out; when theadjustment member 5 is turned, the electric light-generating mechanism 2 will move relative to thelamp support 1 together with theadjustment member 5. - Moreover, when the
light source 22 is shining, heat produced by the electric light-generating mechanism 2 will be conducted away from the front heat-conductingcomponent 3 to thelamp support 1 as well as from the rear heat-conductingcomponent 4 to thebarrel body 6. Thus, heat produced from working of the electric light-generating mechanism 2 can be efficiently dissipated so as not to cause damage or reduce the service life of thelight source 22. - In addition, referring to
Fig. 1 , theadjustment member 5 has twogaps 53 on a rear end thereof, which faces the rear heat-conductingcomponent 4; thus, a suitable tool can be moved to turn theadjustment member 5 after having been engaged in thegaps 53. - From the above description, it can be seen that the present invention has the following advantages:
- 1. The flashlight of the present invention has the adjustment member, which is threadedly joined on the inner threaded portion of the lamp support, and can be turned to change the position of the electric light-generating mechanism in relation to the lamp support so as to adjust position of the focal point of light emitted from the light source of the electric light-generating mechanism.
- 2. Heat produced from shining of the light source of the electric light-generating mechanism will be conducted away from the front heat-conducting component to the lamp support as well as from the rear heat-conducting component to the barrel body. Therefore, heat produced from the light source continuing shining for an extended length of time can be dissipated, thus prevented from causing damage to the light source.
Claims (9)
- A flashlight, comprising
a lamp support; the lamp support having a joining part; the lamp support having a light-reflecting cup adjoining a first end of the joining part; the joining part having a threaded portion on a second end thereof;
an electric light-generating mechanism held in the joining part of the lamp support; the electric light-generating mechanism including a circuit board, and a light source; the circuit board having a controlling circuit thereon;
a front heat-conducting component interposed between the lamp support and the electric light-generating mechanism;
an adjustment member for adjusting a position of a focal point of light emitted from the light source; the adjustment member having a threaded portion on an outer circumferential side thereof; the adjustment member being threadedly joined on the threaded portion of the lamp support at the outer threaded portion thereof;
a barrel body; the barrel body being hollow; the barrel body having a button switch fitted on a rear end thereof;
a power supplying mechanism held in the barrel body to supply electricity to the electric light-generating mechanism; the button switch being electrically connected to the power supply mechanism and the controlling circuit on the circuit board of the electric light-generating mechanism;
a rear heat-conducting component interposed between the adjustment member and the barrel body; and
a covering member; the covering member being positioned around the light-reflecting cup of the lamp support and joined on the barrel body. - The flashlight as claimed in claim 1, wherein the light source is a light emitting diode.
- The flashlight as claimed in claim 1, wherein the front heat-conducting component is a metallic spring.
- The flashlight as claimed in claim 3, wherein the joining part of the lamp support has a locating groove on the first end thereof, and one end of the front heat-conducting component is held in the locating groove of the joining part of the lamp support.
- The flashlight as claimed in claim 1, wherein the rear heat-conducting component is a metallic spring.
- The flashlight as claimed in claim 5, wherein the adjustment member has an annular groove on an outer circumferential side thereof, and one end of the rear heat-conducting component is embedded in the annular groove of the adjustment member.
- The flashlight as claimed in claim 1, wherein the adjustment member has a plurality of gaps on one end thereof, which faces the rear heat-conducting component.
- The flashlight as claimed in claim 1, wherein the joining part of the lamp support has a locating groove on the first end thereof, and one end of the front heat-conducting component is held in the locating groove of the joining part of the lamp support.
- The flashlight as claimed in claim 1, wherein the adjustment member has an annular groove on an outer circumferential side thereof, and one end of the rear heat-conducting component is embedded in the annular groove of the adjustment member.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2008200516710U CN201273461Y (en) | 2008-08-01 | 2008-08-01 | Electric torch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2149739A1 true EP2149739A1 (en) | 2010-02-03 |
EP2149739B1 EP2149739B1 (en) | 2013-03-20 |
Family
ID=40883808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09006052A Not-in-force EP2149739B1 (en) | 2008-08-01 | 2009-05-02 | Flashlight |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2149739B1 (en) |
CN (1) | CN201273461Y (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019127573A1 (en) * | 2019-10-14 | 2021-04-15 | Ledlenser GmbH & Co. KG | LED flashlight |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113007621B (en) * | 2021-02-26 | 2023-01-20 | 深圳市海洋王照明工程有限公司 | Electric torch |
CN113217833B (en) * | 2021-05-24 | 2023-01-06 | 深圳晶石半导体科技有限公司 | LED light source with energy-conserving heat dissipation function |
CN113952032B (en) * | 2021-12-20 | 2022-09-02 | 北京诺亦腾科技有限公司 | Space tracking equipment for orthopedic surgery |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0311327A2 (en) * | 1987-10-07 | 1989-04-12 | Mag Instrument Inc. | Tailcap switch-focus flashlight |
WO2005109533A1 (en) * | 2004-04-28 | 2005-11-17 | Galli Robert D | Led lighting assembly with improved heat management |
US20070133197A1 (en) * | 2005-12-09 | 2007-06-14 | Wen-Chin Shiau | Flashlight |
US20070236920A1 (en) * | 2006-03-31 | 2007-10-11 | Snyder Mark W | Flashlight providing thermal protection for electronic elements thereof |
-
2008
- 2008-08-01 CN CNU2008200516710U patent/CN201273461Y/en not_active Expired - Lifetime
-
2009
- 2009-05-02 EP EP09006052A patent/EP2149739B1/en not_active Not-in-force
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0311327A2 (en) * | 1987-10-07 | 1989-04-12 | Mag Instrument Inc. | Tailcap switch-focus flashlight |
WO2005109533A1 (en) * | 2004-04-28 | 2005-11-17 | Galli Robert D | Led lighting assembly with improved heat management |
US20070133197A1 (en) * | 2005-12-09 | 2007-06-14 | Wen-Chin Shiau | Flashlight |
US20070236920A1 (en) * | 2006-03-31 | 2007-10-11 | Snyder Mark W | Flashlight providing thermal protection for electronic elements thereof |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019127573A1 (en) * | 2019-10-14 | 2021-04-15 | Ledlenser GmbH & Co. KG | LED flashlight |
DE102019127573B4 (en) | 2019-10-14 | 2022-11-10 | Ledlenser GmbH & Co. KG | LED flashlight |
Also Published As
Publication number | Publication date |
---|---|
EP2149739B1 (en) | 2013-03-20 |
CN201273461Y (en) | 2009-07-15 |
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