LED lamp for microwave oven

Abstract

LED lamp for microwave oven, comprising a base (1), an LED strip (3) electrically connected to the base (1), and a bulb (2) connected to the base (1), wherein the base (1) has a main body (11) to which two contact discs are attached for connection to an external power source, each contact disc (12) having a connecting section (1201) that abuts the outer surface of the main body (11), the main body (11) forming two through-holes (1104) through which a wire (13) passes, one end of each wire (13) being electrically connected to the connecting section (1201) and the other end projecting outwards through the main body (11) forming a holder, wherein at least one of the guide holes (1104) is fully or at one end enlarged to form a receiving space (1105),wherein a resistor (14) is arranged in this receiving space (1105), wherein the resistor (14) is embedded and limited in the receiving space (1105), and wherein the resistor is connected in series with the wire (13) which runs through this receiving space (1105).

Description

Technical field

[0001] The invention relates to the field of lighting for household appliances, in particular an LED lamp for a microwave oven. State of the art

[0002] With the rapid development of LED technology, incandescent microwave lamps are gradually being replaced by LED lamps. Currently, there are two main types of LED microwave lamps. One type uses the traditional incandescent bulb with a glass bulb and an integrated glass core as a carrier for the LED strip. This type of LED lamp has disadvantages such as difficult core machining, complex assembly, fragility, and high manufacturing costs. The other type uses a separate plastic bulb and a separate lamp base, with the LED chip integrated into the bulb. This type effectively reduces manufacturing costs and machining effort; however, the integrated LED chip is relatively large, and the bulb and lamp base must be connected, which still makes the assembly process quite complex.Furthermore, the LED chip can only be operated with direct current and requires a driver, which leads to a large number of components inside the bulb, making this unfavorable for cost reduction.

[0003] Conventional LED lamps also use a combination of mains-powered LED strips, wires, and a current-limiting resistor to simplify the lamp body. However, these LED lamps still require a core on the base to secure the wires. In a microwave oven, the current-limiting resistor and wires are exposed to high-frequency microwave radiation, which can easily turn them into highly inductive inductors and cause them to lose their current-limiting function. Furthermore, the wires connected at both ends can resonate with the microwaves, causing further interference. This can ultimately lead to the resistor failing to perform its current-limiting function, the LED lamp emitting an unstable light, or even burning out.

[0004] Therefore, the problem of how to simplify the structure of LED lamps in order to control production costs and ensure continuous and stable light emission in a high-frequency microwave environment urgently needs to be solved. Object of the invention

[0005] The object of the invention is to provide an LED lamp for microwave ovens to solve the problems of existing LED lamps for microwave ovens, which have many components, complex mounting structures, cumbersome assembly and high manufacturing costs, as well as poor light emission stability and short lifespan, which are caused when used in microwave ovens by the influence of high-frequency electromagnetic waves on the resistance.

[0006] This invention is realized through the following technical solutions: An LED lamp for a microwave oven, comprising a base, an LED strip electrically connected to the base, and a bulb connected to the base, wherein the base has a main body to which two contact discs are attached for connection to an external power source, each contact disc having a connecting section that abuts the outer surface of the main body, the main body forming two through-holes, each with a wire passing through the guide holes, one end of each wire being electrically connected to the connecting section and the other end protruding outwards through the main body, forming a holder, wherein at least one of the guide holes is fully or at one end enlarged to form a receiving space, wherein a resistor is arranged in this receiving space, the resistor being embedded and limited in the receiving space.and wherein the resistor is connected in series with the wire that runs through this recording space.

[0007] Preferably, the two guide bores are fully or partially enlarged to form a receiving chamber, with each receiving chamber containing a resistor connected in series with the corresponding wire. Connecting the two wires in series with the resistors creates a more stable connection. This not only improves the stability of the socket but also increases the size of the resistors and the adjustable resistance range, thus enabling adaptation to different external input voltages and installation spaces.

[0008] Preferably, the receiving space is formed by widening the end of the guide bore near the connection section, while the other, unwidened end is penetrated by the wire. This achieves receiving space insulation, preventing the heat generated by the resistor from being conducted into the interior of the bulb after assembly in the LED lamp.

[0009] Preferably, the end of the resistor rests against the connecting section, and the guide hole and the wire form a contact fit. This shortens the wire length between the resistor and the connecting section, and thus the overall length of the wires at both ends of the resistor. Furthermore, the structural limitation of the guide hole and the wires reduces the absorption of high-frequency microwaves by long wires and prevents the generation of interference. When used in a microwave oven, this reduces the inductive effect of the resistor, stabilizes the resistance value, and maintains its stable current-limiting function.

[0010] Preferably, an annular collar is provided on the side of the main body opposite the contact discs, wherein the collar surrounds an interior space in which projections are formed that are connected to the main body, and wherein the guide bores penetrate the main body and the projections. The annular collar and the projections increase the length of the guide bores and reduce the thickness of the main body.

[0011] Preferably, the contact discs each additionally have a mounting base consisting of four strips extending from the connecting section, the strips penetrating the main body and then bent so that they rest against the inner surface of the main body. This enables a secure connection and automated assembly.

[0012] Preferably, the LED strip is operated with alternating current and has terminals at both ends and a substrate. The substrate has two conductive traces connecting the LED chips. Each end of the conductive traces is connected to a terminal via a rectifier diode. The rectifier diodes at the two ends of the same conductive trace are connected in opposite directions, and the rectifier diodes connected to the same terminal are also connected in opposite directions. This allows for a direct connection to alternating current without an additional driver, simplifying the internal design of the bulb and the assembly process.

[0013] Preferably, the piston and the base are connected by threads or hooks.

[0014] Preferably, the main body of the base is provided with several primary heat dissipation holes and the top of the piston with several secondary heat dissipation holes. As the temperature inside the piston rises, convection is generated through the primary and secondary heat dissipation openings, accelerating heat dissipation. Beneficial effects

[0015] The above technical solutions offer the following advantages or positive effects: 1) Existing LED microwave oven lamps have many components, complex mounting structures, elaborate assembly, and high manufacturing costs. In the invention, the base is provided with guide holes. At least one of the guide holes is widened along its entire length or at one end, forming a receiving space in which the resistor is located and connected in series with the wire. The contact discs, wires, resistor, and receiving space form an assembled base that can be directly connected to the LED strip and the bulb and directly to an external power source. This significantly simplifies the structure of the LED microwave oven lamp, reduces material costs, and facilitates assembly. The overall cost of the lamp is reduced by 50%, and automated assembly is made easier. 2) To solve the problem that when using LED lamps in microwave ovens, the resistor and its wires are exposed to the high-frequency microwave environment, which can easily cause inductive reactance and resonance, leading to unstable resistance values, loss of current limiting function, and impairment of the stability and lifespan of the LED light emission, the invention provides that the end of the resistor may rest against the connecting section of the contact disc to shorten the wire length between the resistor and the connecting section, thus reducing the overall length of the wires at both ends of the resistor. Simultaneously, the structural constraints created by the transition fit between the guide bore and the wire mitigate the interference caused by long, microwave-absorbing wires in the high-frequency microwave environment.Therefore, when using an LED lamp with this main body in a microwave oven, the inductive effect of the resistance is reduced, thereby stabilizing the resistance value, keeping the current limiting function stable, promoting stable LED light emission, and extending the service life. 3) By mounting the bulb and LED strip onto the base, which integrates the support function, electrical connection, and high-frequency inductance damping, quick assembly of the LED strip and bulb is achieved, allowing for rapid installation of the LED lamp in the microwave oven. This enables easy assembly, short production cycles, low manufacturing costs, a straightforward cost structure, and simple installation. The LED lamp is therefore ideally suited for high-frequency microwave environments, especially for illuminating the cooking chamber of a microwave oven. Brief description of the drawings

[0016] Further features, objectives and advantages of the present invention will become clearer from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Fig. 1 a sectional view of the base of the invention, Fig. 2 an exploded view according to Fig. 1, Fig. 3 a sectional view of the LED lamp of the invention (1), Fig. 4 a sectional view of the LED lamp of the invention (2), Fig. 5 a sectional view of the LED lamp of the invention (3), Fig. 6 a representation of the LED strip of the invention, Fig. 7. A representation of the connection between the base and the piston, (a) Example 1, (b) Example 2 Ways to implement the invention

[0017] The present invention is described in more detail below with reference to embodiments, but its implementation is not limited thereto. Design 1

[0018] As in the Fig. As shown in Figures 1-3, this embodiment provides an LED lamp for microwave ovens, comprising a base 1, an LED strip 3 electrically connected to the base 1, and a bulb 2 connected to the base 1. The base 1 has a main body 11 to which two contact discs are attached for connection to an external power source. Each contact disc 12 has a connecting section 1201 that abuts the outer surface of the main body 11. The contact discs 12 can be attached to the main body 11 by gluing, riveting, etc. Preferably, the contact discs 12, as shown in Figures 1-3, have a contact surface 1201. Fig. Figure 2 shows an additional mounting foot 1202, consisting of four strips extending from the connecting section 1201. The strips penetrate the main body 11 and are then bent so that they rest against the inner surface of the main body 11. This achieves a multi-point fixation, which increases the strength of the connection with the main body 11 and facilitates the automated assembly of the contact discs 12.

[0019] The main body 11 forms two through-holes 1104. A wire 13 runs through each of the guide holes 1104. One end of each wire 13 is electrically connected to the connecting section 1201, and the other end protrudes through the main body 11, forming a support. At least one of the guide holes 1104 is fully or partially enlarged, thus forming a receiving space 1105. A resistor 14 is arranged in this receiving space 1105. The depth of the receiving space 1105 is at least as deep as the length of the resistor 14. The resistor 14 is embedded and confined within the receiving space 1105. The resistor is connected in series with the wire 13 that runs through this receiving space 1105.

[0020] Based on the above structure, the recording chamber 1105 and the resistor 14 can be configured in various ways: As in the Fig. 1, Fig. 2, Fig. 3 to Fig. As shown in Figure 4, one end of one of the guide bores 1104 is fully or partially enlarged to form a receiving chamber 1105. The wire 13 running through the receiving chamber 1105 is connected in series with the resistor 14, which is arranged in the receiving chamber 1105, to form a holder with a single current-limiting function.

[0021] In Fig. 5. The two guide bores 1104 are fully or partially enlarged to each form a receiving chamber 1105. The two wires 13 are each connected in series with a resistor 14 located in the receiving chamber 1105 to form a holder with a dual current-limiting function.

[0022] The receiving chamber 1105 can be formed by widening the guide bore 1104 along its entire length. In this case, the receiving chamber 1105 and the resistor 14 are abutting each other, thus creating a boundary that prevents the resistor 14 from falling out. Alternatively, the receiving chamber 1105 can also be formed by widening one end of the guide bore 1104, while the other, unwidened end remains penetrated by the wire 13 to fix its position. In this case, the resistor 14 is fixed by the connection of the wire 13 to the connecting section 1201 and its fit against the receiving chamber 1105.

[0023] In a preferred embodiment, as in Fig. As shown in Figure 1, the receiving chamber 1105 is formed simply by widening the end of the guide bore 1104 near the connecting section 1201. The wire 13 is passed through the other end of the guide bore 1104, which is not widened. The resistor 14 is confined and fixed within the receiving chamber 1105. After the LED lamp is mounted, the receiving chamber 1105 is insulated from the bulb 2, so that the heat generated by the resistor 14 does not affect the temperature in the bulb 2. Preferably, the end of the resistor 14 rests against the connecting section 1201 to shorten the wire length between the resistor 14 and the connecting section 1201 as much as possible, thereby reducing the overall length of the wires 13 at both ends of the resistor 14. Specifically, the wire 13 is folded from the end near the resistor 14, lies against the connecting section 1201 and is electrically connected by spot welding, soldering, etc.At the same time, the guide bore 1104 and the wire 13 form a transition fit, i.e., the gap between the wire 13 and the guide bore 1104 is based on the principle of a minimum gap, which allows for convenient assembly, so that the gap is used to limit and weaken the disturbances caused by the absorption of the microwaves by the long wire 13, which forms the support, thereby reducing the inductive effect of the resistor 14, so that the stable current limiting function of the resistor 14 is maintained.

[0024] Furthermore, as in Fig. As shown in Figure 2, an annular collar 1101 is provided on the side of the main body 11 opposite the contact discs 12. This collar surrounds an interior 1102 in which projections 1103 are formed and connected to the main body. The guide bores 1104 penetrate the main body 11 and the projections 1103 to increase the length of the guide bores 1104 without increasing the thickness of the main body 11 of the base 1. During assembly of the LED lamp, the annular collar 1101 facilitates the connection and guidance between the bulb and the main body 11 of the base 1, thus increasing the ease of assembly. Design 2

[0025] As in the Fig. As shown in Figures 3-5, this embodiment provides an LED lamp for microwave ovens. In the first embodiment of the microwave oven LED lamp, a bulb 2 and an LED strip 3 are mounted on the base 1. The LED strip 3 can consist of a single filament or several filaments connected in series or parallel. The wires 13 are electrically connected to the two ends of the series or parallel filaments. In this embodiment, an LED strip 3 with a single filament is used as an example. For clarity, the LED strip 3 is arranged along the length of the bulb 2. The wire 13 electrically connected to the far end of the LED strip 3 is referred to as the first wire 131, and the wire 13 electrically connected to the near end is referred to as the second wire 132.

[0026] Depending on the structure of the base 1, the LED lamp in this embodiment can be configured in various ways: In Fig. In section 3, the first wire 131 is connected in series with a resistor 14, and the second wire 132 is connected in series with no resistor 14. Accordingly, the end of the guide bore 1104, through which the first wire 131 runs, is widened near the connection section 1201 to form a receiving space 1105, in which the series-connected resistor 14 is received. The guide bore 1104, through which the second wire 132 runs, directly penetrates the main body 11 of the base 1.

[0027] In Fig. In section 4, the first wire 131 is connected in series with no resistance 14, and the second wire 132 is connected in series with the resistance 14. Accordingly, the guide bore 1104, through which the first wire 131 runs, directly penetrates the main body 11 of the base 1, and the end of the guide bore 1104, through which the second wire 132 runs, is widened near the connection section 1201 to form a receiving space 1105 in which the series-connected resistance 14 is received and contained.

[0028] In Fig. In section 5, the first wire 131 and the second wire 132 are each connected to a resistor 14. Accordingly, the ends of the guide bores 1104 near the connection sections 1201 are enlarged, each forming a receiving space 1105 to accommodate and limit the resistors connected in series with the first wire 131 and the second wire 132. This design is more favorable for the connection stability of the LED strip 3, increases the adjustable range of the total resistance value of the resistors 14, and allows adaptation to different external input voltages or installation space sizes. This makes the design of the LED strip 3 and the base 1 more flexible.

[0029] The LED strip 3 in the above embodiments is any LED strip that can be directly operated with alternating current. As shown in Fig. As shown in Figure 6, the LED strip has three terminals 31 at each end and a substrate 32. Two conductive traces 34 are provided on the substrate 32, connecting the LED chips 33. Each end of the conductive traces 34 is connected to a terminal 31 via a rectifier diode 35. The rectifier diodes 35 at the two ends of the same conductive trace 34 are connected in opposite directions. The rectifier diodes 35 connected to the same terminal 31 are also connected in opposite directions. Specifically, when the rectifier diodes 35 are mounted on the substrate 32, the rectifier diodes 35 connected to the two ends of the same conductive trace 34 and installed in the same orientation are conductive and blocking for the interconnect circuit. The same terminal 31 is connected to a positive and a negative rectifier diode 35, which are connected in opposite directions.The conductive traces 34 integrate the unidirectional current conductivity of the rectifier diodes 35, creating a bidirectional lighting circuit that can be connected directly to alternating current without an additional driver. This simplifies the design within the bulb 2 and thus also the assembly.

[0030] Piston 2 and base 1 are connected by threads or hooks. Possible assembly methods are: In Fig. 3 The piston 2 has at least two elastic hooks 41 at its open end and the base 1 forms corresponding hook holes 42. The elastic hooks 41 project into the hook holes 42 to establish a connection.

[0031] Or as in Fig. As shown in Figure 7(a), the annular collar 1101 is provided with an external thread 43 and the piston 2 with an internal thread 44. The piston 2 and the annular collar 1101 are connected to each other by the external thread 43 and the internal thread 44.

[0032] As in Fig. As shown in Figure 7(b), the annular collar 1101 is provided with an annular groove 45 on its outer surface, and the piston 2 has a projecting ring 46 on its inner surface. The piston 2 and the annular collar 1101 are connected to each other by the annular groove 45 and the projecting ring 46.

[0033] In a particularly preferred embodiment (see Fig. 2) The main body 11 of the base 1 is provided with several first heat dissipation holes 1106. As shown in the Fig. 3, Fig. 4 to Fig.As shown in Figure 5, the top of the piston 2 is provided with several secondary heat dissipation holes 21. When the temperature inside the piston 2 rises, convection is generated through the first heat dissipation holes 1106 and the secondary heat dissipation holes 21, which accelerates heat dissipation.

[0034] The invention thus relates to an LED lamp for a microwave oven, comprising a base 1, an LED strip 3 electrically connected to the base 1, and a bulb 2 connected to the base 1, wherein the base 1 has a main body 11 to which two contact discs are attached for connection to an external power source, wherein each contact disc 12 has a connecting section 1201 that abuts the outer surface of the main body 11, wherein the main body 11 forms two through-holes 1104, wherein a wire 13 passes through each of the guide holes 1104, wherein one end of each wire 13 is electrically connected to the connecting section 1201 and the other end projects outwards through the main body 11, forming a recess 1105, wherein at least one of the guide holes 1104 is fully or at one end enlarged, thus forming a receiving space 1105.wherein a resistor 14 is arranged in this receiving chamber 1105, wherein the resistor 14 is embedded and confined within the receiving chamber 1105, and wherein the resistor is connected in series with the wire 13 that runs through this receiving chamber 1105. The invention integrates matched contact discs, wires, resistor, and receiving chamber onto the base, allowing the base to be directly connected to LED strips, bulbs, and an external power source. This significantly reduces material costs. Furthermore, this LED lamp features a simple assembly process, a compact structure, low manufacturing costs, easy automation, and suitability for high-frequency microwave environments, particularly for illumination in the cooking chamber of microwave ovens.

[0035] The above description merely presents the preferred embodiments of the present invention and does not limit its scope of protection. Therefore, minor modifications, equivalent changes, and variations of the above embodiments that are based on the core technical principles of the invention also fall within its scope of protection. Reference symbol list 1 socket 11 Main body 1101 ring-shaped collar 1102 Interior 1103 Advance 1104 Guide hole 1105 Recording Room 1106 first heat dissipation hole 12 Contact disc 1201 Connecting section 1202 Mounting foot 13 wires 131 first wire 132 second wire 14 Resistance 2 pistons 21 second heat dissipation hole 3 LED strips 31 connection 32 Substrat 33 light chip 34 conductor track 35 Rectifier diode 41 elastic hooks 42 hook holes 43 external threads 44 internal threads 45 Ring groove 46 protruding ring

Claims

[1] An LED lamp for a microwave oven, comprising a base (1), an LED strip (3) electrically connected to the base (1), and a bulb (2) connected to the base (1), wherein the base (1) has a main body (11) to which two contact discs are attached for connection to an external power source, each contact disc (12) having a connecting section (1201) that abuts the outer surface of the main body (11), the main body (11) forming two through-hole guides (1104), each of which a wire (13) passes through the guides (1104), one end of each wire (13) being electrically connected to the connecting section (1201) and the other end projecting outwards through the main body (11) to form a holder, wherein at least one of the guides (1104) is fully or at one end enlarged to form a receiving space (1105),wherein a resistor (14) is arranged in this receiving space (1105), wherein the resistor (14) is embedded and limited in the receiving space (1105), and wherein the resistor is connected in series with the wire (13) which runs through this receiving space (1105). [2] LED lamp for microwave oven according to claim 1, characterized by , that the two guide bores (1104) are fully or partially enlarged to form a receiving chamber (1105) in each of the receiving chambers (1105), wherein a resistor (14) is arranged in each of the receiving chambers (1105) which is connected in series with the corresponding wire (13). [3] LED lamp for microwave oven according to claim 1, characterized by , that the receiving space (1105) is formed by widening the end of the guide bore (1104) near the connecting section (1201), while the other, unwidened end is penetrated by the wire (13). [4] LED lamp for microwave oven according to claim 2, characterized by, that the receiving space (1105) is formed by widening the end of the guide bore (1104) near the connecting section (1201), while the other, unwidened end is penetrated by the wire (13). [5] LED lamp for microwave oven according to claim 3, characterized by , that the end of the resistor (14) rests against the connecting section (1201) and the guide bore (1104) and the wire (13) form a transition fit. [6] LED lamp for microwave oven according to claim 4, characterized by , that the end of the resistor (14) rests against the connecting section (1201) and the guide bore (1104) and the wire (13) form a transition fit. [7] LED lamp for microwave oven according to claim 1, characterized by, that an annular collar (1101) is provided on the side of the main body (11) opposite the contact discs (12), wherein the collar surrounds an interior (1102) in which projections (1103) are formed which are connected to the main body, and wherein the guide bores (1104) penetrate the main body (11) and the projections (1103). [8] LED lamp for microwave oven according to claim 1, characterized by , that the contact discs (12) each additionally have a mounting foot (1202) consisting of four strips extending from the connecting section (1201), the strips penetrating the main body (11) and then being bent so that they lie against the inner surface of the main body (11). [9] LED lamp for microwave oven according to claim 1, characterized by, that the LED strip (3) is operated with alternating current and has terminals (31) at both ends and a substrate (32), wherein two conductor tracks (34) are provided on the substrate (32) which connect the light chips (33), wherein the two ends of the conductor tracks (34) are each connected to a terminal (31) via a rectifier diode (35), wherein the rectifier diodes (35) at the two ends of the same conductor track (34) are connected in opposite directions, and wherein the rectifier diodes (35) which are connected to the same terminal (31) are also connected in opposite directions. [10] LED lamp for microwave oven according to claim 1, characterized by , that the piston (2) and the base (1) are connected by threads or hooks. [11] LED lamp for microwave oven according to claim 1, characterized by, that the main body (11) of the base (1) is provided with several first heat dissipation holes (1106) and the top of the piston (2) is provided with several second heat dissipation holes (21).

Images