WO2012000196A1

WO2012000196A1 - Led illumination lamp and lamp core and lamp fixture thereof

Info

Publication number: WO2012000196A1
Application number: PCT/CN2010/074873
Authority: WO
Inventors: 秦彪
Original assignee: Qin Biao
Priority date: 2010-06-30
Filing date: 2010-06-30
Publication date: 2012-01-05

Abstract

An LED illumination lamp and a lamp core and a lamp fixture thereof are provided. The LED illumination lamp includes the lamp core and the lamp fixture with a radiation fin (3). The lamp core includes an LED core (1) and a heat conduction core (2). A buckling mechanism and an axial elastic tightening mechanism are arranged between the lamp core and the radiation fin, so that the contact pressure of the heat transfer surface between the heat conduction core and the radiation fin is ensured. The mounting rotation angle of the buckling mechanism is within the range of 0-180°.

Description

LED lighting and its wick and luminaire

Technical field

[0001] The invention belongs to the technical field of LED illumination, and particularly relates to an LED illumination lamp in which a heat sink is a component in a lamp, and a wick and a heat sink can be conveniently assembled and disassembled.

technical background

[0002] Chinese invention patent application "LED lighting lamp and its LED wick", application number: 200900108927. 6, discloses an LED lighting lamp, proposes LED wick and heat sink (lamp) as detachable parts, LED wick includes With LED core and thermal core, LED wick will be designed into a series of standard components, and a technical solution to solve the problem of heat conduction between LED wick (thermal conductive core) and heat sink is disclosed. The structure is the simplest, the easiest to process, and the cost. The low is the cone thermal core solution. Although the tapered column and the hole are easy to process, the accuracy is easy to ensure, but any machining has errors, such as a taper of 1:10. If the taper hole diameter and the outer diameter of the cone column have a 0. 05mm error (very small), the reaction is made to the heat conductive core. The difference in axial displacement is 0. 5mm, which is very large. The heat transfer resistance between the heat conducting core and the heat sink is closely related to the contact pressure between the heat transfer surfaces of the two, and the pressure is large and the heat resistance is small. The users of the lighting are the majority of the people. The wick should be designed and manufactured to the general public. The wick can be properly placed in place without any tools or training, and the thermal resistance between the thermal core and the heat sink is not a problem. However, the above-mentioned invention patent application does not involve this problem, nor does it disclose a technical solution to solve the problem.

Summary of the invention

[0003] The object of the present invention is to solve the above problems, and propose a solution, adopting an axial elastic tensioning mechanism to ensure a certain contact pressure between the heat transfer core and the heat transfer surface of the heat sink, that is, to ensure both The thermal resistance between the contacts does not exceed the specified value, achieving the purpose of reliable heat transfer, reducing the processing accuracy, ie cost. The fastening mechanism with a mounting angle of not more than 180° is not only simple in structure, but also easy to install the wick.

[0004] The technical solution of the present invention is: LED lighting lamp comprises a heat sink and a wick, the wick comprises an LED core and a heat conducting core, and a heat sink fastening device, the heat conducting core is provided with a contact heat transfer surface, and the heat sink is also provided Corresponding contact heat transfer surface, the heat sink is a part of the luminaire, the wick can be easily removed and installed from the heat sink (lamp), and the heat transfer between the heat sink and the wick is through their contact heat transfer surface. transmission. The invention is characterized in that: a fastening mechanism for mounting a rotation angle of not more than 180° is used between the wick and the heat sink, and an axial elastic tensioning mechanism is provided.

[0005] The so-called fastening mechanism with a rotation angle of not more than 180° is a fastening device on the wick, which is inserted into the heat sink, and the wick is rotated, but the rotation angle cannot exceed 180°, and the wick can be locked on the heat sink. . In this way, the fastening mechanism eliminates the need for tools when installing the wick, and it is easy to ensure that the normal user is properly installed. When the axial elastic tensioning mechanism is used, when the wick and the heat sink are buckled together, the contact pressure between the contact heat transfer surfaces of the two is ensured by the axial elastic tensioning mechanism, so the transmission between the wick and the heat sink The thermal resistance (contact thermal resistance) is controlled, which solves the problem of unreliable heat transfer due to manufacturing manufacturing errors, and reduces processing requirements, that is, cost.

DRAWINGS

The invention is further described below in conjunction with the drawings and specific embodiments.

1 is a schematic cross-sectional view of a LED illuminating lamp of the present invention, using an axial rod and a horizontal locking rod lock Buckle mechanism.

2 is a plan view of FIG. 1.

3 is a schematic cross-sectional view of a LED illuminating lamp of the present invention, which adopts a locking mechanism of an axial rod and a lateral locking rod, and the contact heat transfer surface is a conical surface.

4 is a schematic cross-sectional view of a LED illuminating lamp of the present invention, which adopts a plug-in rotary locking mechanism and adopts a coaxial electric connector.

5 is a view of a wick in the LED illuminator shown in FIG. 4, the shackle on the wick and the heat conducting core being of a unitary structure.

6 is a view of the locker of FIG. 4, and the tongue on the locker adopts a shrapnel structure.

7 is a schematic cross-sectional view of a LED illuminating lamp of the present invention, which adopts a plug-in rotary locking mechanism, the electrical connection adopts an elastic contact type, and the buckle hook and the heat conducting core are two parts.

8 is a view of the clasp of FIG. 7.

9 is a schematic cross-sectional view of a LED illuminating lamp of the present invention, which adopts a screw type rotary locking mechanism.

10 is a view of the clasp in FIG. 9.

11 is a view of the locker of FIG. 10.

[0018] FIG. 12 is a schematic view of a solar fancy structure.

[0019] FIG. 13 is a schematic view of a solar fancy structure.

[0020] In the figure: 1, LED core, 2, heat-conducting core, 3, heat sink, 4, axial rod, 5, horizontal locking rod, 6, elastic device, 7, wick cover, 8, thermal column, 9 , ribs, 10, long through hole, 11, spring, 12, lock, 13, back cover, 14, clasp, 15, tongue, 16, elastic electrode, 17, temperature probe, 18, electrode Disk, 19, convection cover, 20, spring washer.

detailed description

[0021] FIG. 1 shows an LED illumination lamp of the present invention. The contact heat transfer surface between the heat conducting core 2 and the heat sink 3 is planar, the LED core 1 is disposed on the other side of the heat conducting core 2, and the axial rod 4 is thermally conductive. The center of the contact heat transfer surface of the core 2 protrudes, and the axial rod 4 is provided with a lateral locking rod 5, and between the heat sink 3 and the lateral locking rod 5, an elastic device 6 is provided, and the elastic device 6 is disposed at On the heat sink 3, the lateral locking rod 5 is subjected to the thrust of the elastic means 6, thus forming an axial elastic tensioning mechanism, so that the contact pressure of the contact heat transfer surface between the heat conducting core 2 and the heat sink 3 is made by the elastic means 6 Guaranteed, it can ensure that the heat transfer resistance between the two is effectively controlled. The wick (including the heat conductive core (2) and the LED core (1), and the wick cover (7)) is mounted to the heat sink 3 (lamp): a long strip of lateral locking bars is formed on the heat sink 3 Hole 10, see Fig. 2, the transverse locking rod 5 on the wick passes through the elongated through hole 10 through the heat sink, and rotates at an angle (90° shown in Fig. 2), and the wick is fastened to the heat sink 3 Above, it can be directly seen from Fig. 2 that the rotation angle cannot exceed 180°, so this type of fastening mechanism is called a fastening mechanism with a rotation angle of not more than 180°. The function of the wick cover 7 is to: protect the LED core 1. It is convenient for user installation and secondary optics (for example, scattering or concentrating).

[0022] The LED lighting lamp shown in FIG. 3, the wicking mechanism of the wick and the heat sink (lamp) is the same as that shown in FIG. 1, and the difference is as follows: The axial elastic tensioning mechanism is different, in FIG. 3, the shaft The elastic tensioning mechanism is disposed on the axial rod 4, and is realized by the spring 11. The axial elastic tensioning mechanism can also adopt the lateral locking rod 5 as the elastic rod design; The contact heat transfer surface is a conical surface.

[0023] In the LED illumination lamp of the present invention shown in FIG. 4 and FIG. 5, the heat conducting core 2 adopts a conical column structure, and the fins 3 are provided with a conical hole matched with the cone heat conducting core, and the taper surface is contact transmission. Hot noodles. An LED core 1 is disposed at a front end of the heat conductive core 2, a buckle 14 is disposed at a rear end thereof, and a corresponding latch 12 is disposed on the heat sink 3, and FIG. 6 is a view of the locker of FIG. 4 at the latch 12 There is a tongue 15 and a notch for passing the hook on the heat-conducting core. The hook is directly inserted into the buckle and rotated through a certain angle, and the hook 14 is blocked by the tongue 15 on the buckle 12, that is, The heat-conducting core (wick) is fastened to the heat sink (lamp). The lock structure is called a plug-in rotary lock structure, and the rotation angle cannot exceed 180°. The axial elastic tensioning mechanism can be realized by a latching device. As shown in FIG. 6, the tongue 15 on the locking device adopts a spring-like structure, and the tongue 15 can be elastically deformed, and the elastic force of the tongue 15 is pushed. The buckle 14 on the top heat conducting core generates an axial tensioning force. Of course, the latching device can also adopt other axial elastic tensioning mechanisms. The locker with the axial elastic tensioning mechanism shown in Fig. 6 has a simple structure and is produced by a stamping process using a metal plate material, and has high production efficiency. The clasp 14 shown in Fig. 5 is integrally formed with the heat conducting core 2, and the heat conducting core is made of aluminum material, and the heat conducting core can be manufactured by a hot die casting process, and the production efficiency is high. In the LED illuminator shown in Fig. 4, the electrical connection between the wick and the luminaire is coaxial, and the plug is fixed to the heat sink 3 through the rear cover 13.

[0024] The LED illumination lamp of the present invention shown in FIG. 7 is similar to that shown in FIG. 4, and similarly uses a plug-in rotary lock structure, and the same fastener with an axial elastic tensioning mechanism. The difference is as follows: In Fig. 7, an elastic contact type electrical connection is used, and an elastic electrode 16 is disposed on the rear cover 13, and a corresponding electrode disk 18 is disposed at the rear end of the heat conductive core 2. A design can be adopted: Only when the heat conducting core (wick) is rotated to (or exceeds) a certain angle, the elastic electrode 16 can contact the corresponding electrode on the electrode disk 18, and the electricity can be turned on, thereby ensuring that the user installs the wick. When the wick rotation angle is in place, the contact pressure of the contact heat transfer surface between the heat conductive core and the heat sink is ensured to reach a prescribed value. At the same time, a corner limiting mechanism is arranged on the locker so that the angle of rotation of the installed wick does not exceed a prescribed angle.

[0025] With the contact type electrical connection shown in FIG. 7, if the two electrodes have positive and negative points, in order to ensure that the installation is not error, the hooks 14 on the heat conductive core can be designed to have inconsistent sizes, corresponding lockers. The upper notch (the hook through the mouth) is inconsistent in size, and only one direction can insert the hook and pass through the lock.

[0026] There is another feature in FIG. 7: a temperature probe 17 is disposed on the central axis, and is fixed on the heat sink 3 through the back cover 13, and the temperature probe 17 is inserted into the heat conductive core 2 to directly detect the temperature of the heat conductive core 2, so that The power is adjusted by the detected temperature of the thermal conductive core to ensure that the temperature of the LED core does not exceed the specified value. It is also possible to set a temperature probe on the heat sink, use a certain characteristic temperature on the heat sink, monitor the power, and ensure that the LED core is not overheated.

[0027] In FIG. 7, the clasp 14 and the heat conducting core 2 are two parts, and are assembled into one body by a connecting mechanism (fixed by screws in the figure). The advantages of the design are as follows: The general heat conducting core is made of aluminum, the strength of the aluminum. Not high, divided into two parts, the hook can be made of steel, high strength, low material cost, and the structure of the heat conductive core is simplified, can be manufactured by cold stamping method, high precision, can save mechanical cutting process, improve production effectiveness.

[0028] For the design of the hook and the heat conducting core as two separate components, an axial elastic displacement connecting mechanism may be adopted between the hook and the heat conducting core to achieve axial elastic tension between the heat conducting core and the heat sink. For example, in Fig. 7, a spring (spring piece) is added to the screw of the fixing hook, and a gap is left, and an axial elastic displacement between the hook and the heat conducting core is possible. Alternatively, the hook on the clasp is designed to resemble the clasp 15 in the latch shown in Figure 6, using a shrapnel configuration. [0029] In the LED illumination lamp of the present invention shown in FIG. 9, a spiral rotary locking mechanism is adopted between the heat conducting core 2 (wick) and the heat sink 3 (lamp). 10 and 11 respectively show a view of the clasp 14 and the locker 12, which is a screw thread like a screw and a screw, which can be inserted into the lock 12 by rotation, so such a mechanism It is called a screw type rotary locking mechanism, and the rotation angle of the locking mechanism cannot exceed 180°. The locker and the hook structure are simple, and all of them can be made of sheet metal, which is produced by a stamping process, and has high production efficiency.

[0030] An axial elastic displacement connecting mechanism is adopted between the latch 12 and the heat sink 3 in FIG. 9 , and the spring washer 20 (or spring) between the latch 12 and the heat sink 3 is used to lock the buckle. The device 12 is axially elastically displaceable to achieve axial elastic tension between the heat conducting core and the heat sink.

[0031] There are many types of fin structures, but the fins of the sun-pattern structure: the structure in which the fins 9 protrude from the side of the heat-conducting column 8 can be manufactured by an aluminum extrusion process, and the heat dissipation performance is optimal, which is the preferred heat dissipation. Slice structure. The heat sink in Figure 2 is a sun-flower structure, and the structure shown in Figures 12 and 13 is also a sun-flower structure.

[0032] A solar fancy heat sink with a limited amount of heat dissipation can be provided with a plurality of fins in the luminaire, and a plurality of solar fins are assembled together, and each fin is provided with a wick. In order to increase the heat dissipation, a convection cover 19 can be arranged above the heat sink. As shown in Fig. 7, the chimney suction principle is used to increase the amount of natural convection air to improve the heat dissipation.

[0033] For the LED illuminating lamp of the present invention using the plug-in rotary latch structure and the screw-type rotary latch structure, the taper of the cone heat-conducting core (the taper is defined as: the difference between the diameters of the two cross-sections and the two cross-sections) The ratio of distance, which is consistent with the definition of taper in mechanical engineering, should be considered in many ways: The taper is too large, the contact pressure of the axial elastic force is also small, and the diameter of the rear end of the heat conducting core is also small, The utility model considers that the taper of the heat conducting core should not be greater than 1:5; the taper of the heat conducting core is too small, and the processing precision of the tapered column and the tapered hole is high, otherwise the axial compensation displacement is Large, second, prone to self-locking, that is, the heat-conducting core is locked in the taper hole on the heat sink, it is not easy to disassemble, so the taper of the heat-conducting core should be at least 1:30. The present invention considers that the more reasonable taper of the heat conducting core should be 1:9 to 1:20.

[0034] Special Description: The LED core of the present invention includes an 0 LED core.

Claims

Claim

1. An LED lighting lamp comprising: a heat sink (3) and a wick, the wick comprises an LED core (1) and a heat conducting core (2), the heat conducting core (2) is provided with a contact heat transfer surface, and a heat sink ( 3) There is also a corresponding contact heat transfer surface, which is characterized in that: a fastening mechanism with a mounting angle of not more than 180° is used between the wick and the heat sink (3), and an axial elastic tensioning mechanism is also provided.

2. The LED illuminating lamp according to claim 1, characterized in that the heat conducting core (2) is provided with an axial rod (4), and the axial heat transfer surface of the axial rod (4) from the heat conducting core (2) The center rod is extended; the axial rod (4) is provided with a lateral locking rod (5), and the heat sink (3) is provided with a long through hole (10) of the lateral locking rod; the axial elastic tensioning device is arranged On the axial rod (4) or on the heat sink (3), or the lateral locking rod (5) is an elastic rod.

3. An LED lighting fixture comprising a heat sink (3), characterized in that: the heat sink (3) is provided with a conical hole matched with the cone heat conducting core, and is provided with a mounting rotation angle of not more than 180°. The locking device (12) and the locking device (12) adopt a plug-in rotary locking structure or a screw-type rotary locking structure; an axial elastic displacement connecting mechanism is adopted between the locking device (12) and the heat sink (3) , or the tongue (15) on the locker adopts a shrapnel structure.

4. LED lighting fixture according to claim 3, characterized in that the heat sink has a sun-like structure with fins (9) extending from the side of the heat-conducting column (8).

The LED lighting fixture according to claim 3, characterized in that: in the conical hole in the heat sink (3), a temperature probe (17) is arranged on the central axis.

6. A wick comprising a heat conducting core (2) and an LED core (1), the heat conducting core (2) adopting a cone structure, the LED core (1) is disposed at the front end of the heat conducting core (2), and the side of the cone is in contact a heat transfer surface, characterized in that the cone of the heat conducting core (2) has a taper of 1:5 to 1:30; the rear end of the heat conducting core (2) is provided with a hook (4), and the hook (4) is The plug-in rotary locking structure or the screw-type rotary lock structure of the locker is matched.

7. A wick according to claim 6, characterized in that the cone of the heat conducting core (2) has a taper of 1:9 to 1:20.

8. A wick according to claim 6, characterized in that the clasp (14) and the heat conducting core (2) are integral structural parts manufactured by a hot die casting process.

9. A wick according to claim 6, characterized in that the clasp (14) and the heat conducting core (2) are two parts which are assembled in one piece by means of a connecting mechanism.

The wick according to claim 9, characterized in that: the axial elastic displacement connecting mechanism is adopted between the clasp (14) and the heat conducting core (2), or the hook on the hook adopts a spring-like structure.