LED bulb and railway signal lamp

Abstract

The LED bulb comprises a heat dissipation body, the heat dissipation body is in a hollow column shape, a heat dissipation channel is formed in the heat dissipation body, and a plurality of heat dissipation fins arranged in the height direction of the heat dissipation body are further arranged on the periphery of the heat dissipation body; comprising a light source assembly, the light source assembly comprises a substrate arranged on one side face of a heat dissipation body and a transparent cover which covers the substrate and is provided with an optical angle lens, and at least one LED lamp bead is arranged on the substrate; comprising a fan, the fan is arranged on the heat dissipation body, and airflow driven by the fan at least flows through part of the heat dissipation channels. The utility model further discloses a railway signal lamp using the LED bulb. The LED bulb is provided with the heat dissipation body, the heat dissipation channel and the fan, heat generated when the light source assembly works is transmitted to the heat dissipation body and dissipated through the heat dissipation channel, airflow driven by the fan flows through the heat dissipation channel, the heat dissipation efficiency is improved, the heat dissipation performance of the LED bulb is good, and faults caused by overheating in the extreme climate are avoided.

Description

Technical Field

[0001] The present application relates to the field of signal lamps, and in particular to an LED bulb, and a railway signal lamp using the LED bulb. Background Art

[0002] Road traffic lights are a category of traffic safety products. They are an important tool to strengthen road traffic management, reduce the occurrence of traffic accidents, improve road use efficiency, and improve traffic conditions. Railway signal lights are a type of road traffic lights, which play a very important role in the safe operation of trains and the personal safety of people along the railway. Traditional railway signal lights use tungsten filament bulbs as light sources. The tungsten filament bulbs of railway signal lights generally work at a voltage of 12V, a power of 25W, and a luminous flux of 400 lumens (theoretically). They are dedicated to the control of railway signal systems.

[0003] In recent years, LED light source, as a new type of light source that has been developing rapidly, has the advantages of low power consumption, high brightness, small size, light weight, and long life. How to reasonably apply LED light source to railway signal lights to replace traditional tungsten filament bulbs is an important research topic. In addition, when applying LED light source to railway signal lights, it is necessary to fundamentally solve the problem that LED is prone to serious light decay and dead light when working in a high temperature environment. Therefore, it is necessary to develop an LED bulb that can be used in railway signal lights and has excellent heat dissipation performance. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide an LED light bulb with excellent heat dissipation performance.

[0005] The technical solution adopted by the present application to solve the technical problem is: an LED light bulb, comprising:

[0006] A heat sink, which is in the shape of a hollow column. A heat dissipation channel is provided inside the heat sink. A plurality of heat sink fins are arranged along the height direction of the heat sink.

[0007] The light source assembly comprises a substrate arranged on one side of the heat sink, and a transparent cover with an optical angle lens covering the substrate, wherein at least one LED lamp bead is arranged on the substrate;

[0008] A fan is installed on the heat sink, and the airflow driven by the fan flows through at least a portion of the heat dissipation channel.

[0009] In some embodiments of the present application, an air inlet and an air outlet are provided on the heat dissipation channel, and the fan is disposed at the air inlet.

[0010] In some embodiments of the present application, a plurality of air outlets are provided on the heat dissipation channel, the air outlets are opened on the side wall of the heat dissipation body and the air outlets are located between the heat dissipation fins.

[0011] In some embodiments of the present application, two LED light groups are arranged on the substrate, and each LED light group includes at least one LED lamp bead.

[0012] In some embodiments of the present application, the heat sink includes a main body and a base connected to the main body;

[0013] A plane is provided on one side of the main body, and the base plate is detachably mounted on the plane through a fastener.

[0014] In some embodiments of the present application, the base forms a positive power input terminal, and two negative power input terminals are also provided at the bottom of the base, and the positive and negative ends of each LED light group are connected to the corresponding positive power input terminal and negative power input terminal.

[0015] In some embodiments of the present application, the transparent cover includes a first part covering the fastener, and a second part connected to the first part and covering the periphery of the LED lamp bead;

[0016] The second part is an optical angle lens with a surrounding structure that is convex on the outside and concave in the middle, and a semi-spherical cavity on the inside.

[0017] In some embodiments of the present application, the fastener includes a bolt, a screw, a rivet or a cylindrical pin.

[0018] In some embodiments of the present application, the heat sink is made of aluminum alloy.

[0019] In addition, the present application also provides a railway signal light, comprising the above-mentioned LED bulb, and a control device for controlling the LED bulb.

[0020] The implementation of the present application has the following beneficial effects: the LED bulb of the present application has the advantages of low power consumption, high brightness, long life, vibration resistance, strong focusing and long illumination distance because it adopts an LED light source. At the same time, the LED bulb of the present application is provided with a heat sink, a light source assembly and a fan. The light source assembly and the fan are installed on the heat sink. A heat dissipation channel is provided inside the heat sink. The airflow driven by the fan flows through at least part of the heat dissipation channel. A heat sink is provided outside the heat sink. Both the heat dissipation channel and the heat sink can increase the heat dissipation area. The heat generated by the light source assembly during operation is transferred to the heat sink, and the heat is dissipated through the heat dissipation channel and the heat sink. The airflow driven by the fan flows through the heat dissipation channel to maximize the heat dissipation, thereby ensuring the stable quality of products working in a small space and avoiding failures caused by overheating in extreme climates. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0022] Figure 1 It is a schematic diagram of the structure of the LED bulb provided by this application;

[0023] Figure 2 yes Figure 1 A front view of the LED bulb shown;

[0024] Figure 3 yes Figure 2 Sectional view along line AA.

[0025] Description of Figure Numbers:

[0026] Heat sink 100, main body 110, heat sink 111, base 120, positive power input terminal 121, negative power input terminal 122, heat dissipation channel 130, air inlet 131, air outlet 132;

[0027] Light source assembly 200, substrate 210, first LED light group 211, second LED light group 212, transparent cover 220, optical angle lens 221, first bolt 230, second bolt 240;

[0028] The fan 300 and the mounting base 310 . DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described in detail with reference to the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0031] In the description of the utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and the like are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0033] See also Figures 1 to 3 , some embodiments of the present application disclose an LED light bulb.

[0034] like Figures 1 to 3As shown, the LED bulb provided by the present application includes a heat sink 100, a light source assembly 200 and a fan 300. The heat sink 100 is a hollow column, a heat dissipation channel 130 is arranged inside the heat sink 100, and a plurality of heat sinks 111 arranged along its height direction are also arranged on the periphery of the heat sink 100; the light source assembly 200 includes a substrate 210 arranged on one side of the heat sink 100, and a transparent cover 220 with an optical angle lens 221 covering the substrate 210, and at least one LED lamp bead is arranged on the substrate 210; the fan 300 is installed on the heat sink 100, and the airflow driven by the fan 300 flows through at least part of the heat dissipation channel 130. In the present application, the substrate 210 on the light source assembly 200 is directly set on the heat sink 100. The heat generated by the substrate 210 and the LED lamp beads set on the substrate 210 during operation will be directly conducted to the heat sink 100, and the heat will be dissipated through the heat sink 100 and the heat sink 111, thereby improving the heat dissipation efficiency. A heat dissipation channel 130 is set inside the heat sink 100. When the fan 300 is working, the airflow driven by it at least flows through part of the heat dissipation channel 130, further accelerating the heat dissipation efficiency, so that the LED bulb of the present application has excellent heat dissipation performance and avoids failures caused by overheating in extreme climates.

[0035] In some embodiments, the heat sink 100 is made of a metal with good thermal conductivity, such as copper, iron, aluminum or alloy materials of the above metals, preferably aluminum alloy, which has good heat dissipation performance, ensuring the high heat dissipation of the heat sink 100, and aluminum alloy also has the advantages of high hardness and light weight. In addition, it should be noted that the substrate 210 can be a copper substrate or an aluminum substrate, preferably a copper substrate with better electrical conductivity.

[0036] In some embodiments, Figure 1 and Figure 3 As shown, the heat sink 100 includes a main body 110 and a base 120 connected to the main body 110, a plane is provided on one side of the main body 110, a substrate 210 is detachably mounted on the plane by fasteners, and a heat sink 111 is integrally arranged on the main body 110. The main body 110 and the base 120 can be integrally formed, or the main body 110 and the base 120 can be two independent parts, which are combined together to form the heat sink 100.

[0037] Furthermore, the fastener used to fix the base plate 210 may be at least one of a bolt, a screw, a rivet or a cylindrical pin. Figure 3 As shown, in the exemplary embodiment provided in the present application, the base plate 210 is fixed on the plane of the main body 110 by using the first bolt 230 .

[0038] In some embodiments, Figure 3As shown, the heat dissipation channel 130 is provided with an air inlet 131 and an air outlet 132, and the fan 300 is located at the air inlet 131 of the heat dissipation channel 130. The fan 300 is arranged at the air inlet 131, so that the fan 300 can drive the external airflow to flow through the heat dissipation channel 130 to the maximum extent, thereby improving the heat dissipation efficiency. Figures 1 to 3 As shown, in this embodiment, a mounting base 310 is provided on the top of the main body 110, and the mounting base 310 can be integrally formed with the main body 110, and the mounting base 310 is located at the air inlet 131 of the heat dissipation channel 130, and the fan 300 is fixed on the mounting base 310 by fasteners.

[0039] In some embodiments, Figure 3 As shown, in order to improve the efficiency of heat dissipation, a plurality of air outlets 132 are provided on the heat dissipation channel 130. The air outlets 132 are opened on the side wall of the main body 110, and the air outlets 132 are located between the heat sinks 111. When the airflow driven by the fan 300 flows out through the air outlets 132, the heat sink 111 is cooled at the same time. The provision of a plurality of air outlets 132 can effectively increase the area of ​​the airflow contacting the heat sink 100, thereby utilizing the airflow to better take away the heat on the heat sink 100, and effectively improving the efficiency of heat dissipation.

[0040] In some embodiments, the fan 300 and the light source assembly 200 work synchronously. When the LED lamp beads on the light source assembly 200 are lit, the fan 300 is started to dissipate heat for it, thereby improving the efficiency of heat dissipation.

[0041] In some embodiments, Figure 3 As shown, two LED light groups are arranged on the substrate 210, and the two LED light groups include a first LED light group 211 and a second LED light group 212, and each LED light group includes at least one LED lamp bead. Preferably, the first LED light group 211 and the second LED light group 212 use LED lamp beads of the same brightness, and the first LED light group 211 and the second LED light group 212 are provided. With the corresponding control circuit, the first LED light group 211 and the second LED light group 212 can be controlled to switch and alternately operate as needed, so as to avoid a single LED light group working for a long time, reduce the failure rate of the LED light group, and have high reliability to meet the safety requirements. It is easy to understand that in some embodiments, the first LED light group 211 and the second LED light group 212 are used as backup light groups for each other in case of failure, so as to ensure that the safety requirements of the railway signal control system are met.

[0042] In some embodiments, Figure 2 , Figure 3As shown, in order to conveniently connect the power supply, a positive power input terminal 121 can be formed on the periphery of the base 120, and two negative power input terminals 122 are provided at the bottom of the base 120, and the positive and negative ends of each LED lamp group are connected to the corresponding positive power input terminal 121 and negative power input terminal 122. It should be noted that the base 120 of the present application is consistent with the old tungsten filament bulb in structure, size and position of the positive and negative input terminals, which can improve the compatibility of the LED bulb of the present application. Under the conditions of the original bulb mounting seat and outer cover, the LED bulb of the present application can directly replace the old tungsten filament bulb. First, remove the old tungsten filament bulb from the original bulb mounting seat, and insert or screw the base 120 of the LED bulb of the present application into the corresponding bulb mounting seat, then it can be connected to the power supply for use, which is easy to install and greatly reduces the cost of replacement.

[0043] In some embodiments, Figure 3 As shown, the transparent cover 220 includes a first part on which a first bolt 230 is covered, and a second part connected to the first part and covered on the periphery of the LED lamp bead. The connection between the first part and the second part is close to the substrate 210, and the transparent cover 220 and the substrate 210 are fixed to the main body 110 at the same time by the second bolt 240. Among them, the second part is an optical angle lens 221, the outer side of the optical angle lens 221 is a surrounding structure with a convex outer circle and a concave middle, and the inner side of the optical angle lens 221 is a semi-spherical chamber; the optical angle lens 221 of the above structure is used in the present application to fully exert the luminous characteristics of the LED lamp bead, and can be organically combined with the Fresnel lens system of the existing railway signal lamp, which reduces the cost of replacement to the greatest extent, solves the problem of the light focusing point of the double-circuit structure, and greatly improves the light effect. Compared with the traditional tungsten filament bulb, the LED bulb of the present application adopts the above optical structure, and the light column emitted is round and full, achieving the best illumination.

[0044] Since the LED bulb of the present application adopts an LED light source, it has the advantages of low power consumption, high brightness, long life, vibration resistance, strong focusing and long illumination distance. At the same time, the LED bulb of the present application is provided with a heat sink 100, a light source assembly 200 and a fan 300. The light source assembly 200 and the fan 300 are installed on the heat sink 100. A heat dissipation channel 130 is provided inside the heat sink 100. The airflow driven by the fan 300 flows through at least part of the heat dissipation channel 130. A heat sink 111 is provided outside the heat sink 100. The heat generated by the light source assembly 200 during operation is transferred to the heat sink 100, and the heat is dissipated through the heat dissipation channel 130 and the heat sink 111. The airflow driven by the fan 300 flows through the heat dissipation channel 130, which further accelerates the heat dissipation efficiency, so that the LED bulb of the present application has excellent heat dissipation performance and avoids failures caused by overheating in extreme climates.

[0045] In addition, the present application also provides a railway signal lamp, which includes the LED bulb in any of the above embodiments, and a control device for controlling the LED bulb. The control device is separately provided from the LED bulb, and the control device and the LED bulb are electrically connected by a shielded line to improve the anti-interference performance of the circuit and avoid safety accidents such as lighting or dead lights caused by interference with the circuit due to electromagnetic radiation, lightning strikes, etc.

[0046] Furthermore, in some embodiments, in order to better control the first LED light group 211 and the second LED light group 212 in the LED bulb, the control device in the railway signal light includes a control circuit for controlling the first LED light group 211 and the second LED light group 212 to work alternately.

[0047] It can be understood that the above embodiments only express the preferred implementation methods of the present application, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present application, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments; therefore, all equivalent changes and modifications made to the scope of the claims of the present application should fall within the scope of the claims of the present application.

Claims

1. An LED light bulb, characterized in that: include: A heat sink (100), the heat sink (100) being in the shape of a column with a hollow interior, a heat dissipation channel (130) being provided inside the heat sink (100), and a plurality of heat sinks (111) being arranged along a height direction of the heat sink (100); A light source assembly (200) comprises a substrate (210) arranged on a side of the heat sink (100), and a transparent cover (220) with an optical angle lens (221) covering the substrate (210), wherein at least one LED lamp bead is arranged on the substrate (210); A fan (300) is installed on the heat sink (100), and the airflow driven by the fan (300) flows through at least a portion of the heat dissipation channel (130).

2. The LED bulb according to claim 1, characterized in that: The heat dissipation channel (130) is provided with an air inlet (131) and an air outlet (132), and the fan (300) is arranged at the air inlet (131).

3. The LED bulb according to claim 2, characterized in that: A plurality of air outlets (132) are provided on the heat dissipation channel (130); the air outlets (132) are opened on the side wall of the heat dissipation body (100) and are located between the heat dissipation fins (111).

4. The LED bulb according to claim 1, characterized in that: Two LED light groups are arranged on the substrate (210), and each LED light group includes at least one LED lamp bead.

5. The LED bulb according to claim 4, characterized in that: The heat sink (100) comprises a main body (110) and a base (120) connected to the main body (110); A plane is provided on one side of the main body (110), and the base plate (210) is detachably mounted on the plane via a fastener.

6. The LED bulb according to claim 5, characterized in that: The base (120) forms a positive power input terminal (121), and two negative power input terminals (122) are also provided at the bottom of the base (120), and the positive and negative ends of each LED light group are connected to the corresponding positive power input terminal (121) and negative power input terminal (122).

7. The LED bulb according to claim 5, characterized in that: The transparent cover (220) comprises a first part covering the fastener, and a second part connected to the first part and covering the periphery of the LED lamp bead; The second part is an optical angle lens (221) with a surrounding structure that is convex on the outside and concave in the middle, and a semi-spherical cavity on the inside.

8. The LED bulb according to claim 5 or 7, characterized in that: The fasteners include bolts, screws, rivets or cylindrical pins.

9. The LED light bulb according to claim 1, characterized in that: The heat sink (100) is made of aluminum alloy.

10. A railway signal light, characterized in that: It comprises the LED bulb according to any one of claims 1 to 9, and a control device for controlling the LED bulb.

Images