LED lamp

Abstract

The invention relates to the field of LED lamps, and particularly discloses an LED lamp which comprises a lamp holder, a lamp bracket and a lamp cap, the lamp cap comprises a shell, a radiation cover is arranged in the shell, a plurality of heat dissipation fins which are evenly distributed in the circumferential direction with the axis of the radiation cover as the center are fixedly arranged on the periphery of the radiation cover, LED lamp beads are arranged in the radiation cover, and a fixing plate is fixed to the upper end face of each LED lamp bead. As the LED lamp bead emits light after being electrified, the temperature in the radiation cover is gradually increased, the radiating fins on the periphery of the radiation cover can accelerate outward transmission of heat in the radiation cover, and as the temperature in the radiation cover continuously rises, the bimetallic strip is heated to bend towards one side close to the conducting rod until the bimetallic strip abuts against the conducting rod. When the radiating cover is turned on, the motor is powered on to drive the radiating fan to rotate, so that air circulation between the radiating cover and the shell is accelerated, heat on the radiating cover is further accelerated to be dissipated to the outside, the temperature in the shell is reduced, and the influence of the temperature on components in the shell is reduced.

Description

Technical Field

[0001] The invention relates to the field of LED lamps, in particular to an LED lamp. Background Art

[0002] LED lighting fixtures are a general term for LED lamps, which refer to devices that can transmit light, distribute and change the light distribution of LED light sources, including all parts and components required to fix and protect LED light sources in addition to LED light sources, as well as the circuit accessories necessary for connecting to the power supply. LED lamps will generate heat when emitting light. If the heat dissipation performance of the lamp is poor, the heat will gather at the lamp head. The LED operating temperature will exceed the chip's load temperature, which will rapidly reduce the LED's luminous efficiency and produce obvious light decay. In addition, transparent epoxy resin will denature and turn yellow at high temperatures, affecting its light transmission performance, and thus affecting the stability and reliability of the entire lighting system. Summary of the invention

[0003] The object of the present invention is to provide an LED lamp to overcome the above-mentioned defects in the prior art.

[0004] According to an LED lamp of the present invention, it includes a lamp holder, a lamp frame and a lamp head, the lamp head includes a shell, a radiation cover is arranged in the shell, a plurality of heat dissipation fins are fixedly arranged on the outer periphery of the radiation cover and are evenly distributed in the circumferential direction with the axis of the radiation cover as the center, LED lamp beads are arranged in the radiation cover, a fixing plate is fixed on the upper end face of the LED lamp beads, a plurality of fixing rods are fixed between the fixing plate and the upper side wall of the radiation cover, a conductive rod and a bimetallic strip are arranged between the fixing plate and the upper side wall of the radiation cover, when the bimetallic strip is heated, it bends toward the side close to the conductive rod, a plurality of exhaust holes are formed through the upper side wall of the shell, a heat dissipation fan located on the upper side of the exhaust holes is rotatably connected to the upper side of the shell, an air inlet hole is formed through the peripheral wall of the shell, a motor is arranged between the upper side wall of the shell and the upper end face of the radiation cover, the heat dissipation fan is fixed on the output shaft of the motor, and the motor is powered on and started when the conductive rod abuts against the bimetallic strip.

[0005] Through the above technical scheme, as the LED lamp beads are powered on and emit light, the temperature inside the radiation hood gradually increases, and the heat dissipation fins on the outer periphery of the radiation hood can accelerate the heat transfer from the radiation hood to the outside. As the temperature inside the radiation hood continues to rise, the bimetallic strip is heated and bends toward the side close to the conductive rod until it abuts against the conductive rod. The motor is powered on to drive the heat dissipation fan to rotate, thereby accelerating the air circulation between the radiation hood and the shell, further accelerating the heat dissipation on the radiation hood to the outside, thereby reducing the temperature inside the shell, reducing the impact of temperature on components inside the shell.

[0006] Furthermore, a connection seat surrounding the heat dissipation fan is fixedly provided on the upper end surface of the shell, a protective cover is threadedly connected to the upper end of the connection seat, and a plurality of through holes are formed through the protective cover.

[0007] Through the above technical solution, the arrangement of the connecting seat and the protective cover can effectively protect the heat dissipation fan.

[0008] Furthermore, a connecting plate is fixed on the upper end surface of the shell, a connecting seat is fixed on the upper end surface of the connecting plate, and the connecting seat is fixedly connected to the end of the lamp holder by bolts.

[0009] Through the above technical solution, the setting of the connecting plate facilitates the connection and fixation between the lamp holder and the lamp stand.

[0010] Furthermore, a connecting ring arranged around the motor is fixed on the upper side wall of the shell, and a plurality of through cavities are opened on the peripheral wall of the connecting ring. An embedding ring is fixed on the upper end surface of the radiation cover, and the outer diameter of the embedding ring is consistent with the inner diameter of the connecting ring. The embedding ring can be embedded in the lower end of the connecting ring.

[0011] Through the above technical solution, the engaging ring is embedded in the lower end of the connecting ring, which is convenient for positioning the radiation cover in the shell and fixing the radiation cover in the shell.

[0012] Furthermore, a lampshade is provided at the lower side of the radiation cover, a threaded connection portion surrounding the lampshade is fixedly provided at the edge of the lampshade, an inner wall of the threaded connection portion is threadedly connected to the outer periphery of the lower end of the shell, and the lampshade abuts against the lower end surface of the radiation cover.

[0013] Through the above technical solution, the lampshade can protect the radiation cover and the LED lamp beads therein, and the abutment between the lampshade and the radiation cover can ensure that the radiation cover remains stable in the shell.

[0014] Furthermore, a circle of positioning ring is fixed on the inner wall of the lower end of the shell, the edge of the lower end surface of the radiation cover extends outward to form an extension plate, a circle of rubber covering ring is fixed on the edge of the extension plate, and the upper end surface of the rubber covering ring abuts against the lower end surface of the positioning ring.

[0015] Through the above technical solution, the positioning ring can be set to position the rubber covering ring, and the positioning ring cooperates with the lampshade to clamp and fix the rubber covering ring in the shell.

[0016] Furthermore, a groove is provided on the upper end surface of the positioning ring and surrounds the shell axis as the center. A filter screen seat is arranged on the upper side of the positioning ring. An engaging strip is fixedly provided on the lower end surface of the filter screen seat and embedded in the groove. A clamping portion is fixedly provided on the upper end surface of the filter screen seat. A gap is formed between the outer periphery of the clamping portion and the side wall of the shell. A filter screen is embedded in the gap and surrounds the shell axis as the center. The filter screen abuts against the side wall of the shell and covers the air inlet.

[0017] Through the above technical solution and the setting of the filter, it is possible to reduce the amount of external dust that enters the housing.

[0018] The beneficial effect of the present invention is as follows: as the LED lamp beads emit light after being powered on, the temperature inside the radiation cover gradually increases, and the heat dissipation fins on the outer periphery of the radiation cover can accelerate the heat transfer from the radiation cover to the outside. As the temperature inside the radiation cover continues to rise, the bimetallic strip is heated and bends toward the side close to the conductive rod until it abuts against the conductive rod. The motor is powered on to drive the heat dissipation fan to rotate, thereby accelerating the air circulation between the radiation cover and the shell, further accelerating the heat dissipation on the radiation cover to the outside, thereby reducing the temperature inside the shell, and reducing the impact of the temperature on the LED lamp chip and the epoxy resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a cross-sectional schematic diagram of the lamp holder of the present invention; Figure 3 The present invention Figure 2 The enlarged schematic diagram at A in the middle; Figure 4 The present invention Figure 2 The enlarged schematic diagram of point B in the middle; Figure 5 The present invention Figure 2 The enlarged schematic diagram at C in the middle; Figure 6 It is an exploded view of the lamp holder of the present invention.

[0020] In the figure: 10. Lamp holder; 11. Lamp stand; 20. Shell; 201. Air inlet; 202. Exhaust hole; 21. Connecting plate; 22. Connecting seat; 23. Protective cover; 231. Through hole; 24. Lampshade; 241. Threaded connection; 25. Positioning ring; 26. Filter holder; 261. Fitting strip; 262. Clamping part; 27. Filter; 30. Radiation cover; 31. Heat dissipation fin; 32. Rubber covering ring; 33. Fitting ring; 34. Extension plate; 40. LED lamp bead; 50. Conductive rod; 51. Bimetallic strip; 60. Fixing plate; 61. Fixing rod; 70. Heat dissipation fan; 71. Motor; 80. Connecting ring; 801. Through cavity. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of simplifying the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention. As used herein, the terms up, down and left, right are not limited to their strict geometric definitions, but include reasonable and inconsistent tolerances for machining or human errors. The specific features of this LED lamp are described in detail below: An embodiment of the present invention: Reference Figure 1-Figure 6 The present invention provides an LED lamp, including a lamp holder 10, a lamp frame 11 and a lamp cap, wherein the lamp cap includes a housing 20, a radiation cover 30 is arranged in the housing 20, a plurality of heat dissipation fins 31 are fixedly arranged on the outer periphery of the radiation cover 30 and are evenly distributed in the circumferential direction with the axis of the radiation cover 30 as the center, an LED lamp bead 40 is arranged in the radiation cover 30, a fixing plate 60 is fixed on the upper end surface of the LED lamp bead 40, a plurality of fixing rods 61 are fixed between the fixing plate 60 and the upper side wall of the radiation cover 30, a conductive rod 50 and a bimetallic strip 51 are arranged between the fixing plate 60 and the upper side wall of the radiation cover 30, and when the bimetallic strip 51 is heated, it moves to the upper side wall of the radiation cover 30. The shell 20 is bent on one side close to the conductive rod 50, and a plurality of exhaust holes 202 are formed through the upper side wall of the shell 20. A heat dissipation fan 70 located on the upper side of the exhaust holes 202 is rotatably connected to the upper side of the shell 20. An air inlet hole 201 is formed through the peripheral wall of the shell 20. A motor 71 is provided between the upper side wall of the shell 20 and the upper end surface of the radiation cover 30. The heat dissipation fan 70 is fixed on the output shaft of the motor 71. The conductive rod 50, the bimetallic strip 51 and the motor 71 are electrically connected. When the conductive rod 50 abuts against the bimetallic strip 51, the conductive rod 50, the bimetallic strip 51 and the motor 71 form a complete passage, and the motor 71 is powered on and started.

[0023] Reference Figure 2 , Figure 4 A connection base 22 surrounding the heat dissipation fan 70 is fixedly disposed on the upper end surface of the housing 20 , and a protective cover 23 is threadedly connected to the upper end of the connection base 22 . A plurality of through holes 231 are formed through the protective cover 23 .

[0024] Reference Figure 1 , Figure 2 A connecting plate 21 is fixed to the upper end surface of the housing 20 , a connecting seat 22 is fixed to the upper end surface of the connecting plate 21 , and the connecting seat 22 is fixedly connected to the end of the lamp holder 11 by bolts.

[0025] Reference Figure 2 , Figure 4 , Figure 5A connecting ring 80 is fixed to the upper side wall of the shell 20 and is arranged around the motor 71. A plurality of through cavities 801 are opened on the peripheral wall of the connecting ring 80. A fitting ring 33 is fixed to the upper end surface of the radiation cover 30. The outer diameter of the fitting ring 33 is consistent with the inner diameter of the connecting ring 80, and the fitting ring 33 can be embedded in the lower end of the connecting ring 80.

[0026] Reference Figure 2 , Figure 3 A lampshade 24 is arranged at the lower side of the radiation cover 30, and a threaded connection part 241 is fixedly arranged at the edge of the lampshade 24, and the inner wall of the threaded connection part 241 is threadedly connected with the outer periphery of the lower end of the shell 20, and the lampshade 24 abuts against the lower end surface of the radiation cover 30, and a circle of positioning ring 25 is fixed on the inner wall of the lower end of the shell 20, and the positioning ring 25 is made of rubber, and the positioning ring 25 and the inner wall of the lower end of the shell 20 are fixed to the shell by the friction between the positioning ring 25 and the inner wall of the shell 20. In the body 20, the edge of the lower end surface of the radiation cover 30 extends outward to form an extension plate 34, and a circle of rubber covering ring 32 is fixed on the edge of the extension plate 34. The upper end surface of the rubber covering ring 32 abuts against the lower end surface of the positioning ring 25. The upper end surface of the positioning ring 25 is provided with a circle of grooves centered on the axis of the shell 20. A circle of filter seats 26 are arranged on the upper side of the positioning ring 25. The filter seats 26 are made of hard rubber. The lower end surface of the filter seats 26 is fixed with an engaging strip 261 embedded in the groove. The upper end surface of the filter seats 26 is fixed with a circle of clamping parts 262. A gap is formed between the outer periphery of the clamping part 262 and the side wall of the shell 20. A filter screen 27 centered on the axis of the shell 20 is embedded in the gap. The filter screen 27 abuts against the side wall of the shell 20, and the filter screen 27 covers the air inlet 201.

[0027] When the present invention is in use, the LED lamp bead 40 is powered on to emit light, and the light is dissipated downward through the lampshade 24. As the LED lamp bead 40 emits light, heat continues to be dissipated therefrom, causing the temperature inside the radiation cover 30 to continue to rise. The heat on the radiation cover 30 is dissipated to the radiation cover 30 and the shell 20 through the heat dissipation fins 31.

[0028] During this process, the bimetallic strip 51 is bent by the heat, and as the temperature rises, the degree of bending of the bimetallic strip 51 increases. When the bimetallic strip 51 abuts against the conductive rod 50, the motor 71 is powered on and started, thereby driving the cooling fan 70 to rotate, and the air between the radiation cover 30 and the shell 20 is drawn out of the shell 20 as the cooling fan 70 rotates, and the outside air enters the shell 20 and the radiation cover 30 through the air inlet 201, thereby accelerating the air flow between the shell 20 and the radiation cover 30, and then accelerating the heat loss on the radiation cover 30, thereby reducing the temperature inside the radiation cover 30, and reducing the influence of the temperature inside the radiation cover 30 on the LED lamp beads 40.

[0029] It will be clear to those skilled in the art that various modifications to the above embodiments may be made without departing from the overall spirit and concept of the present invention. All of these modifications fall within the scope of protection of the present invention. The protection scheme of the present invention shall be subject to the claims attached to the present invention.

Claims

1. An LED lamp, comprising a lamp holder (10), a lamp frame (11) and a lamp cap, characterized in that: The lamp holder comprises a shell (20), a radiation cover (30) is arranged in the shell (20), a plurality of heat dissipation fins (31) are fixedly arranged on the outer circumference of the radiation cover (30) and are evenly distributed in the circumferential direction with the axis of the radiation cover (30) as the center, an LED lamp bead (40) is arranged in the radiation cover (30), a fixing plate (60) is fixed to the upper end surface of the LED lamp bead (40), a plurality of fixing rods (61) are fixed between the fixing plate (60) and the upper side wall of the radiation cover (30), and a conductive rod (50) and a bimetallic strip (51) are arranged between the fixing plate (60) and the upper side wall of the radiation cover (30). When the bimetallic strip (51) is heated, it bends toward a side close to the conductive rod (50), a plurality of exhaust holes (202) are formed through the upper side wall of the shell (20), a heat dissipation fan (70) located above the exhaust holes (202) is rotatably connected to the upper side of the shell (20), an air inlet hole (201) is formed through the peripheral wall of the shell (20), a motor (71) is arranged between the upper side wall of the shell (20) and the upper end surface of the radiation cover (30), the heat dissipation fan (70) is fixed to the output shaft of the motor (71), and the motor (71) is powered on and started when the conductive rod (50) abuts against the bimetallic strip (51).

2. The LED lamp according to claim 1, characterized in that: A connection seat (22) surrounding the heat dissipation fan (70) is fixedly provided on the upper end surface of the shell (20), a protective cover (23) is threadedly connected to the upper end of the connection seat (22), and a plurality of through holes (231) are formed through the protective cover (23).

3. The LED lamp according to claim 1, characterized in that: A connecting plate (21) is fixed to the upper end surface of the housing (20), a connecting seat (22) is fixed to the upper end surface of the connecting plate (21), and the connecting seat (22) is fixedly connected to the end of the lamp holder (11) by means of bolts.

4. The LED lamp according to claim 1, characterized in that: A connecting ring (80) arranged around the motor (71) is fixed to the upper side wall of the housing (20), and a plurality of through cavities (801) are provided through the peripheral wall of the connecting ring (80). A fitting ring (33) is fixed to the upper end surface of the radiation cover (30), and the outer diameter of the fitting ring (33) is consistent with the inner diameter of the connecting ring (80), and the fitting ring (33) can be embedded in the lower end of the connecting ring (80).

5. The LED lamp according to claim 4, characterized in that: A lampshade (24) is provided at the lower side of the radiation cover (30); a threaded connection portion (241) surrounding the lampshade (24) is fixedly provided at the edge of the lampshade (24); an inner wall of the threaded connection portion (241) is threadedly connected to the outer periphery of the lower end of the housing (20); and the lampshade (24) abuts against the lower end surface of the radiation cover (30).

6. The LED lamp according to claim 5, characterized in that: A circle of positioning ring (25) is fixed on the inner wall of the lower end of the shell (20); the edge of the lower end surface of the radiation cover (30) extends outward to form an extension plate (34); a circle of rubber covering ring (32) is fixed on the edge of the extension plate (34); the upper end surface of the rubber covering ring (32) abuts against the lower end surface of the positioning ring (25).

7. The LED lamp according to claim 6, characterized in that: The upper end surface of the positioning ring (25) is provided with a groove which surrounds the axis of the shell (20) as the center. A filter screen seat (26) is arranged on the upper side of the positioning ring (25). The lower end surface of the filter screen seat (26) is fixedly provided with an engaging strip (261) which is embedded in the groove. The upper end surface of the filter screen seat (26) is fixedly provided with a clamping portion (262). A gap is formed between the outer periphery of the clamping portion (262) and the side wall of the shell (20). A filter screen (27) which surrounds the axis of the shell (20) as the center is embedded in the gap. The filter screen (27) is in contact with the side wall of the shell (20). The filter screen (27) covers the air inlet hole (201).

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