Lamp

Abstract

The utility model provides a kind of lamps and lanterns, including light source, light source adapter plate, the light source adapter plate includes oppositely arranged first surface and second surface, the first surface is provided with conductive layer, the conductive layer forms the conductive path connecting the light source and input power supply, the second surface is provided with conductive contact, the first surface is also provided with capacitor, one end of the capacitor and the conductive layer are connected, the other end of the capacitor and the conductive contact are connected, the lamps and lanterns further include radiator, the radiator includes bearing surface, the bearing surface and at least part of the second surface contact, the conductive contact and the radiator are electrically connected. The present application is by between light source adapter plate and radiator setting electric connection path, solve the arc problem in lamp and lantern safety regulation test voltage test.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to a lamp. Background Technology

[0002] LED lighting is characterized by low energy consumption, environmental friendliness, and long lifespan, making it a mainstream product in the current lighting industry. To comply with safety standards, LED luminaires must pass a withstand voltage test before leaving the factory. During this test, arcing often occurs, causing damage to the luminaires. The existing solution to address this arcing problem is to add a ground wire to the metal lamp body on the light source board. However, this solution requires soldering the ground wire, a cumbersome, time-consuming, and labor-intensive process that increases assembly difficulty and costs. Utility Model Content

[0003] The purpose of this invention is to solve the arcing problem in the pressure resistance test of LED lamps.

[0004] To achieve the above objectives, the present invention provides a lighting fixture, characterized in that: the lighting fixture includes a light source and a light source adapter plate; the light source adapter plate includes a first surface and a second surface disposed opposite to each other; a conductive layer is disposed on the first surface, forming a conductive path connecting the light source and an input power supply; conductive contacts are disposed on the second surface; a capacitor is also disposed on the first surface, one end of the capacitor is connected to the conductive layer, and the other end of the capacitor is connected to the conductive contacts; the lighting fixture further includes a heat sink, the heat sink includes a bearing surface, the bearing surface is in contact with at least a portion of the second surface, and the conductive contacts are electrically connected to the heat sink.

[0005] Furthermore, the light source adapter board is a double-sided PCB board, and the conductive contacts are exposed copper disks.

[0006] Furthermore, the light source is an LED COB light source, and one end of the capacitor is electrically connected to the positive or negative electrode of the LED COB light source through the conductive layer.

[0007] Furthermore, the capacitor is a surface-mount capacitor, and the capacitor and the conductive contacts are disposed at relative positions on the first surface and the second surface.

[0008] Furthermore, the radiator is provided with a countersunk hole, and an elastic element made of conductive material is provided in the countersunk hole. The conductive contact is electrically connected to the radiator through the elastic element.

[0009] Furthermore, the elastic element can be compressed along the axial direction of the countersunk hole, and when the second surface of the light source adapter plate contacts the heat sink, the elastic element and the conductive contact abut against each other.

[0010] Furthermore, the elastic element is a linear spring, and when uncompressed, the elastic element protrudes 3-5 mm above the bearing surface.

[0011] Furthermore, the lamp also includes a light source bracket, which is fixedly connected to the heat sink, and the light source adapter plate is sandwiched between the light source bracket and the heat sink.

[0012] Furthermore, the light source bracket is provided with a receiving groove that has the same shape as the light source adapter plate, and the light source adapter plate is disposed in the receiving groove.

[0013] Furthermore, the lamp also includes a housing, and the heat sink and the housing are integrally formed.

[0014] This application solves the arcing problem in the withstand voltage test of luminaire safety regulations by setting an electrical connection path between the light source adapter board and the heat sink. Attached Figure Description

[0015] Figure 1 This is an exploded view of a lamp according to a preferred embodiment of the present invention;

[0016] Figure 2 This is a cross-sectional view of a lamp according to a preferred embodiment of the present invention;

[0017] Figure 3 yes Figure 1 Schematic diagram of the heat dissipation lamp body in the embodiment lamp;

[0018] Figure 4 yes Figure 1 Schematic diagram of the light source bracket in the embodiment;

[0019] Figure 5 yes Figure 1 Schematic diagram of the light source adapter plate in the embodiment lamp;

[0020] Figure 6 This is a circuit diagram of a lamp according to a preferred embodiment of the present invention. Detailed Implementation

[0021] The lamp proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] An exploded view of a preferred embodiment of the lamp in this application is shown below. Figure 1 As shown, the sectional view is as follows Figure 2 As shown, this embodiment is a track spotlight, including a heat dissipation lamp body 1, a light source adapter plate 3, a light source 7, a light source bracket 4, a lens 5, and a face ring 6. The heat dissipation lamp body 1 is as follows... Figure 3As shown, the device includes a cylindrical housing 101 and a heat sink 102 disposed within the housing 101. The heat sink 102 includes a bearing surface 105, forming an accommodating space between the bearing surface 105 and the housing 101. A light source adapter plate 3, a light source 7, a light source support 4, and a lens 5 are all disposed within this space. A face ring 6 is disposed at the opening of the housing 101 directly opposite the bearing surface 105 of the heat sink 102, axially limiting the light source support 4 and the lens 5, so that the light source adapter plate 3 is pressed against the bearing surface 105 of the heat sink 102, achieving the heat dissipation function. In this embodiment, the heat sink body 1 is a single metal component, with the housing 101 and the heat sink 102 integrally formed. In other preferred embodiments, the heat sink 102 and the housing 101 can be detachably connected. In the mating position, the heat sink 102 can also be exposed behind the housing 101 to increase the airflow area; this application does not limit this.

[0023] like Figure 5 As shown, in this embodiment, light source 7 is an LED COB light source. An LED COB light source is a high-efficiency integrated surface light source where LED chips are directly mounted on a high-reflectivity mirror substrate, bonded to the circuit board via bonding wires using COB packaging technology, and covered with resin to ensure reliability. Compared to other LED light sources, it has advantages such as electrical stability, high color rendering, uniform light emission, fast heat dissipation, easy light distribution, no reflow soldering required, and reduced luminaire design complexity. Light source 7 is connected to the electronic drive module via a light source adapter board 3. The light source adapter board 3 is a double-sided PCB board, including a first surface and a second surface arranged opposite each other. Figure 5 The first surface shown is covered with a conductive layer 301. The conductive layer forms electrical connection paths from the input power supply V+ terminal to the positive electrode pad 701 of the light source 7 and from the input power supply V- terminal to the negative electrode pad 702 of the light source 7. A capacitor C1 is also disposed on the first surface of the light source adapter plate 3. One end of capacitor C1 is connected to the positive electrode of the light source 7 through the conductive layer 301, and the other end is connected to a conductive contact disposed on the second surface of the light source adapter plate 3. The conductive contact is located on the second surface directly opposite capacitor C1. The heat sink 102 is made of metal. Since the second surface of the light source adapter plate 3 and the heat sink 102 are attached, the other end of capacitor C1 can be grounded through this conductive contact on the second surface of the light source adapter plate 3, thereby preventing arcing, while the capacitor also provides isolation. In other preferred embodiments, capacitor C1 can also be connected to the negative electrode of the light source 7; this application does not limit this. To reduce the height and avoid obstructing the light source 7, capacitor C1 in this embodiment is a surface-mount capacitor.

[0024] The conductive contact is an exposed copper disk on the second surface of the light source adapter plate 3, positioned directly opposite the capacitor C1 on the first surface. The exposed copper disk can directly contact the bearing surface 105 of the heat sink 102 to achieve electrical connection. However, since the copper disk protrudes slightly relative to the second surface, if it directly contacts the bearing surface of the heat sink 102, the second surface around the copper disk cannot fully adhere to the heat sink 102, thus affecting the heat dissipation effect. Therefore, in this embodiment, a countersunk hole 103 is provided on the bearing surface 105 of the heat sink 102, and an elastic element 2 that can be compressed along the axial direction of the countersunk hole 103 is placed inside the countersunk hole 103. The elastic element 2 is made of metal material; in this embodiment, it is a linear spring. When uncompressed, the elastic element 2 protrudes 3-5 mm above the surface of the bearing surface 105 of the heat sink 102. When the light source adapter plate 3 is installed on the heat sink 102, the second surface of the light source adapter plate 3 and the bearing surface 105 of the heat sink 102 come into contact and fit together. After the elastic member 2 is compressed, it abuts against the conductive contact, thereby realizing the electrical connection from the light source adapter plate 3 to the heat sink 102.

[0025] To ensure that the elastic element makes precise contact with the conductive contact, positioning is achieved using a light source bracket 4 in this embodiment. The structure of the light source bracket 4 is as follows: Figure 3 As shown, the light source bracket 4 is provided with a receiving groove 401 that matches the shape of the light source adapter plate 3. A positioning protrusion 402 is provided on the outer circumferential surface of the light source bracket 4, and two limiting ribs 106 are provided on the inner wall of the housing 101. During installation, the positioning protrusion 402 is inserted between the two limiting ribs 106, thereby restricting the circumferential rotation of the light source bracket 4. The adapter plate is disposed within the receiving groove. Simultaneously, a screw hole 104 is provided on the heat sink 102, and a through hole 403 is provided at a corresponding position on the light source bracket 4. During installation, the light source 7 and the light source adapter plate 3 are first inserted into the receiving groove 401 of the light source bracket 4. Then, the light source bracket 4 and the housing 101 are aligned and inserted, and screws are used to pass through the through hole 403 and the screw hole 104 on the heat sink to lock them in place, thus achieving a fixed connection between the light source bracket 4 and the heat sink 102. The light source adapter plate 3 is sandwiched between the light source bracket 4 and the heat sink 102, and the conductive contacts of the elastic element 2 and the light source adapter plate 3 abut against each other to achieve electrical connection. Then, the lens 5 is placed into the light source bracket 4 and the face ring 6 is snapped into the heat dissipation lamp body 1, and the entire lamp assembly is completed.

[0026] The solution provided in this application has the following specific circuit: Figure 6 As shown, the external power supply powers the light source 7 via electronic drive. A capacitor C1 is connected to the positive terminal of the light source 7, and capacitor C1 is grounded through the elastic element 2. This design uses the elastic element 2 as the grounding wire for capacitor C1, eliminating the need for welding during assembly, reducing labor costs, and improving production efficiency. Furthermore, the elastic element 2 ensures good contact with the conductive contacts, effectively preventing arcing and solving the arcing problem in withstand voltage testing.

[0027] The description of the preferred embodiments of this application above is for illustrative purposes and is not intended to exhaustively describe or limit the application to the specific forms disclosed. Obviously, many modifications and variations may be made, which may be apparent to those skilled in the art and should be included within the scope of this utility model as defined by the appended claims.

Claims

1. A luminaire, characterized by: The luminaire includes a light source and a light source adapter plate. The light source adapter plate includes a first surface and a second surface disposed opposite to each other. A conductive layer is disposed on the first surface, forming a conductive path connecting the light source and an input power supply. A conductive contact is disposed on the second surface. A capacitor is also disposed on the first surface. One end of the capacitor is connected to the conductive layer, and the other end of the capacitor is connected to the conductive contact. The luminaire also includes a heat sink. The heat sink includes a bearing surface, which is in contact with at least a portion of the second surface. The conductive contact is electrically connected to the heat sink.

2. The luminaire of claim 1, wherein: The light source adapter board is a double-sided PCB board, and the conductive contacts are exposed copper disks.

3. The luminaire of claim 1, wherein: The light source is an LED COB light source, and one end of the capacitor is electrically connected to the positive or negative terminal of the LED COB light source through the conductive layer.

4. The luminaire of claim 1, wherein: The capacitor is a surface-mount capacitor, and the capacitor and the conductive contacts are disposed at relative positions on the first surface and the second surface.

5. The luminaire of claim 1, wherein: The radiator is provided with a countersunk hole, and an elastic element made of conductive material is provided in the countersunk hole. The conductive contact is electrically connected to the radiator through the elastic element.

6. The luminaire of claim 5, wherein: The elastic element can be compressed along the axial direction of the countersunk hole. When the second surface of the light source adapter plate contacts the heat sink, the elastic element and the conductive contact abut against each other.

7. The luminaire of claim 6, wherein: The elastic element is a linear spring, and when uncompressed, the elastic element protrudes 3-5 mm above the bearing surface.

8. The luminaire of claim 6, wherein: The lamp also includes a light source bracket, which is fixedly connected to the heat sink, and the light source adapter plate is sandwiched between the light source bracket and the heat sink.

9. The luminaire of claim 8, wherein: The light source bracket is provided with a receiving groove that has the same shape as the light source adapter plate, and the light source adapter plate is disposed in the receiving groove.

10. The luminaire of any of claims 1-9, wherein: The lamp also includes a housing, and the heat sink and the housing are integrally formed.

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