EP2149739B1 - Flashlight - Google Patents

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Publication number
EP2149739B1
EP2149739B1 EP09006052A EP09006052A EP2149739B1 EP 2149739 B1 EP2149739 B1 EP 2149739B1 EP 09006052 A EP09006052 A EP 09006052A EP 09006052 A EP09006052 A EP 09006052A EP 2149739 B1 EP2149739 B1 EP 2149739B1
Authority
EP
European Patent Office
Prior art keywords
lamp support
flashlight
adjustment member
conducting component
light
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.)
Not-in-force
Application number
EP09006052A
Other languages
German (de)
French (fr)
Other versions
EP2149739A1 (en
Inventor
Yunzhao Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2149739A1 publication Critical patent/EP2149739A1/en
Application granted granted Critical
Publication of EP2149739B1 publication Critical patent/EP2149739B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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.
  • US 2007/0296920 discloses a flashlight with a light source mounted on a board, wherein a heat-dissipating plate and a heat-dissipating casing aid in dissipating heat generated by the light source.
  • 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)

Description

    BACKGROUND OF THE INVENTION 1. Field of the invention
  • 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.
    • 2. Brief Description of the Prior Art
  • 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. US 2007/0296920 discloses a flashlight with a light source mounted on a board, wherein a heat-dissipating plate and a heat-dissipating casing aid in dissipating heat generated by the light source.
  • Therefore, it is a main object of the present invention to provide an improvement on a flashlight to overcome the above problems.
    • SUMMARY OF THE INVENTION
  • 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.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • 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).
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Referring to Fig. 1 to Fig. 3, preferred embodiment of 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.
  • Referring to Figs. 3 and 4, 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.
  • 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-conducting component 3 to the lamp support 1 as well as from the rear heat-conducting component 4 to the barrel 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 the light source 22.
  • In addition, referring to Fig. 1, 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.
  • From the above description, it can be seen that the present invention has the following advantages:
    1. 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. 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)

  1. A flashlight, comprising
    a lamp support (1); the lamp support (1) having a joining part (12); the lamp support (1) having a light-reflecting cup (11) adjoining a first end of the joining part (12); the joining part (12) having a threaded portion (122) on a second end thereof;
    an electric light-generating mechanism (2) held in the joining part (12) of the lamp support (1); the electric light-generating mechanism (2) including a circuit board (21), and a light source (22); the circuit board (21) having a controlling circuit thereon;
    a front heat-conducting component (3) interposed between the lamp support (1) and the electric light-generating mechanism (2);
    an adjustment member (5) for adjusting a position of the electric light generating mechanism (2) relative to the lamp support (1) together therewith; the adjustment member (5) having a threaded portion (51) on an outer circumferential side thereof; the adjustment member (5) being threadedly joined at the outer threaded portion thereof; on the threaded portion (122)of the lamp support (1)
    a barrel body (6); the barrel body (6) being hollow; the barrel body (6) having a button switch (61) fitted on a rear end thereof;
    a power supplying mechanism (7) held in the barrel body (6) to supply electricity to the electric light-generating mechanism (2); the button switch (61)being electrically connected to the power supply mechanism (7) and the controlling circuit on the circuit board (21) of the electric light-generating mechanism (2);
    a rear heat-conducting component (4) interposed between the adjustment member (5) and the barrel body (6); and
    a covering member (8); the covering member (8) being positioned around the light-reflecting cup (11) of the lamp support (1) and joined on the barrel body (6).
  2. The flashlight as claimed in claim 1, wherein the light source (22) is a light emitting diode.
  3. The flashlight as claimed in claim 1, wherein the front heat-conducting component (3) is a metallic spring.
  4. The flashlight as claimed in claim 3, wherein the joining part (12) of the lamp support (1) has a locating groove (121) on the first end thereof, and one end of the front heat-conducting component (3) is held in the locating groove (121) of the joining part (12) of the lamp support (1).
  5. The flashlight as claimed in claim 1, wherein the rear heat-conducting component (4) is a metallic spring.
  6. The flashlight as claimed in claim 5, wherein the adjustment member (5) has an annular groove (52) on an outer circumferential side thereof, and one end of the rear heat-conducting component (4) is embedded in the annular groove (52) of the adjustment member (5).
  7. The flashlight as claimed in claim 1, wherein the adjustment member (5) has a plurality of gaps on one end thereof, which faces the rear heat-conducting component (4).
  8. The flashlight as claimed in claim 1, wherein the joining part (12) of the lamp support (1) has a locating groove (121) on the first end thereof, and one end of the front heat-conducting component (3) is held in the locating groove (121) of the joining part (12) of the lamp support (1).
  9. The flashlight as claimed in claim 1, wherein the adjustment member (5) has an annular groove (52) on an outer circumferential side thereof, and one end of the rear heat-conducting component (4) is embedded in the annular groove (52) of the adjustment member (5).
EP09006052A 2008-08-01 2009-05-02 Flashlight Not-in-force EP2149739B1 (en)

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 EP2149739A1 (en) 2010-02-03
EP2149739B1 true 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)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019127573B4 (en) * 2019-10-14 2022-11-10 Ledlenser GmbH & Co. KG LED flashlight
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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4841417A (en) * 1987-10-07 1989-06-20 Mag Instrument, Inc. Tailcap switch-focus flashlight
US6966677B2 (en) * 2001-12-10 2005-11-22 Galli Robert D LED lighting assembly with improved heat management
TW200722677A (en) * 2005-12-09 2007-06-16 Wen-Chin Shiau Heat dissipation structure for blaze flashlight
US7357534B2 (en) * 2006-03-31 2008-04-15 Streamlight, Inc. Flashlight providing thermal protection for electronic elements thereof

Also Published As

Publication number Publication date
EP2149739A1 (en) 2010-02-03
CN201273461Y (en) 2009-07-15

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