Lamp bead, radiation device and drying device

Abstract

The utility model discloses a lamp bead, a radiation device and a drying device.The lamp bead comprises a shell, at least two supporting columns, a lamp filament and a mounting structure, and the lamp filament comprises a main light-emitting part located in the middle and two connecting parts located at the two ends; each connecting part comprises a first part wound and fixed on the corresponding supporting column and a second part positioned between the first part and the main light-emitting part; the supporting columns are installed on the installation structure, and the edge, facing the main light-emitting part, of the installation structure is a first edge. The supporting column is located on one side of the first edge, or one end of the supporting column is flush with the first edge, or one end of the supporting column exceeds the first edge, the length of the exceeding part is smaller than or equal to a preset value, and the preset value is 1 mm, or the length of the second part is 30%. According to the lamp bead, the radiation device and the drying device, the system rigidity of the lamp filament is reduced by shortening the length of the supporting column in the lamp bead, so that the elasticity of the lamp filament is improved, the buffering capacity of the lamp filament to impact force is improved, and the brittle fracture risk of the lamp filament is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optics, in particular to a lamp bead, a radiation device and a drying device. BACKGROUND

[0002] The light-emitting principle of an incandescent lamp is to heat the filament to incandescence to emit light. The filament of the incandescent lamp is generally made of a thin tungsten wire, and the filament is supported and fixed in the bulb by relevant fixing structures.

[0003] Since the filament itself is relatively fragile, when the incandescent lamp is impacted or vibrated, the part connected with the fixing structure is prone to breakage, resulting in damage to the incandescent lamp. CONTENT OF THE INVENTION

[0004] The present application provides a lamp bead, a radiation device and a drying device, aiming to solve the problem that the filament of the incandescent lamp bead is prone to breakage when impacted or vibrated in the prior art.

[0005] The present application provides a lamp bead, comprising: a shell, the shell being a light-transmitting structure, the shell comprising a sealed cavity; at least two support columns; a filament, the filament being at least partially located in the cavity, the filament comprising a main light-emitting part located in the middle and two connecting parts located at two ends, the connecting parts being different from the extension direction of the main light-emitting part, the connecting parts comprising a first part wound and fixed on the corresponding support column and a second part located between the first part and the main light-emitting part; a mounting structure, the mounting structure being a part of the shell or mounted on the shell, each of the support columns being mounted on the mounting structure, and the edge of the mounting structure facing the main light-emitting part being a first edge; wherein at least one of the support columns is one of the following structures:

[0006] The support column is located on the side of the first edge away from the main light-emitting part;

[0007] One end of the support column is flush with the first edge;

[0008] One end of the support column exceeds the first edge, and the length of the exceeding part is less than or equal to a preset value, the preset value being 1mm or 30% of the length of the second part.

[0009] Optionally, the filament is a double helix structure, wherein:

[0010] The connecting part is a primary helix structure formed by single winding of the filament;

[0011] The main light-emitting part is a secondary helix structure formed by re-winding of the filament after forming a primary helix.

[0012] Optionally, the filament is wound on a core wire to form the primary spiral structure, and after removing a preset part of the core wire, a remaining part constitutes each of the support columns.

[0013] Optionally, the core wire is formed of molybdenum.

[0014] Optionally, the main light-emitting part extends along a direction substantially perpendicular to the connecting part, and / or the lengths and structures of the two connecting parts are the same.

[0015] Optionally, the number of the support columns is two, and the filament is supported only by the two support columns.

[0016] Optionally, the part of the filament located in the cavity is entirely the main light-emitting part.

[0017] Optionally, the shell comprises a clamping part, at least part of the support column is located inside the clamping part and fixed with the clamping part, the mounting structure is part of the clamping part, and the junction of the clamping part and the cavity constitutes the first edge.

[0018] Optionally, the support column is a conductor and has a resistivity less than that of the filament; the lamp bead further comprises:

[0019] at least two molybdenum sheets, the molybdenum sheets being located in the clamping part and electrically connected with the corresponding support columns;

[0020] at least two electrodes, one end of the electrode being electrically connected to the corresponding molybdenum sheet, and the other end extending out of the clamping part.

[0021] Optionally, the support column is a molybdenum column, and one end of the molybdenum column is electrically connected with the molybdenum sheet through welding and / or a pre-pressure of the clamping part.

[0022] Optionally, the mounting structure comprises at least two fixing arms, the fixing arms being fixed to the shell, and the support column being fixed to the fixing arm.

[0023] Optionally, the fixing arm is a conductor, and the fixing arm is connected between the filament and the electrode of the lamp bead.

[0024] Optionally, the shell comprises a clamping part, a part of the fixing arm is located inside the clamping part and fixed with the clamping part, and another part of the fixing arm extends into the cavity and is fixed with the corresponding support column.

[0025] Optionally, one end of the support column exceeds the first edge, and the length of the exceeding part is any one of 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, and 30% of the length of the second part.

[0026] The application also provides a radiation device for generating infrared radiation, characterized in that it comprises one or more lamp beads as described above; one or more light cups, each of which is configured to install the lamp bead, and is configured to direct the light emitted by the lamp bead to a preset direction and / or change the diffusion angle of the light emitted by the lamp bead.

[0027] Optionally, the light cup has a preset focal plane; when the lamp bead is installed in the light cup, at least part of the filaments extend along the focal plane, and / or at least part of the filaments are symmetrical relative to the focal plane.

[0028] Optionally, the radiation device further comprises a substrate, and the light cup and the substrate are installed with each other; the lamp bead has an electrode, and the electrode and the substrate are installed with each other.

[0029] The application also provides a drying device, comprising: a shell, wherein an air duct is arranged in the shell; a wind power assembly arranged in the shell and configured to generate airflow in the air duct; the lamp bead described above; and a power supply electrically connected to the wind power assembly and the lamp bead.

[0030] Optionally, the drying device further comprises: a drop detection circuit configured to send a drop signal when it is detected that the drying device is in a drop state; and a control circuit configured to cut off power supply to the lamp bead after receiving the drop signal.

[0031] The lamp bead, the radiation device, and the drying device in the application reduce the system stiffness of the filaments by shortening the length of the support column in the lamp bead, thereby improving the flexibility of the filaments, increasing the buffering capacity of the filaments to impact force, and reducing the risk of brittle fracture of the filaments.

[0032] Additional aspects and advantages of the embodiments of the application will be in part apparent and in part pointed out hereinafter in the description. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above and / or additional aspects and advantages of the application can become apparent and more readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0034] Figure 1a 、 Figure 1b Structure schematic diagram of the lamp bead in different embodiments of the application;

[0035] Figure 2a Cross-sectional schematic diagram of the filament and the support column in some embodiments of the application;

[0036] Figure 2b is Figure 1b Partial enlarged schematic diagram of position A in FIG. 8;

[0037] Figure 3a 、 Figure 3b Structure diagram of a filament in different embodiments of the present application;

[0038] Figure 4 、 Figure 5 Structure diagram of a radiation device in some embodiments of the present application;

[0039] Figure 6 Structure diagram of a drying device in some embodiments of the present application. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below with reference to the accompanying drawings. In the drawings, the same or similar numerals in different drawings denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0041] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0042] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be a mechanical connection, or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] The disclosure herein provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0045] like Figure 1a As shown, in certain embodiments of the present application, a lamp bead 10 is provided, comprising a shell 11, a filament 12, at least two support columns 13 and at least two electrodes 152. The shell 11 is a light-transmitting structure, generally made of glass, transparent plastic and other materials, and comprises a chamber 111 and a clamping portion 112. During production, the shell 11 is squeezed and deformed by high temperature and / or high pressure to form a clamping portion 112. The clamping portion 112 can seal the edge of the chamber 111 to isolate the outside air, so that a sealed space is formed inside the chamber 111. The chamber 111 is generally vacuum or filled with halogen gas to prevent the filament 12 from being oxidized when running at high temperature. The chamber 111 referred to in the present application specifically refers to the cavity area inside the lamp bead 10, and can also be easily understood as an area filled with vacuum, low pressure, or halogen gas. A certain structure is located in the chamber 111, which means that the structure is located in an area filled with vacuum, low pressure, or halogen gas.

[0046] The filament 12 is at least partially located in the cavity 111 and is directly or indirectly electrically connected to the electrode 152. When an external power source passes an electric current through the electrode 152 to the filament 12, the filament 12 rapidly heats up due to the resistance until it reaches an incandescent state (about 2000-3000°C) and emits visible light. Since the shell 11 is a light-transmitting structure, the light can be transmitted out of the shell 11. The spectrum of the incandescent lamp is close to a continuous spectrum, which generally includes all visible light from red to violet, and also includes infrared light and ultraviolet light. The lamp bead 10 in some embodiments of the present application is mainly used to emit infrared light to directly heat the irradiated object in the form of heat radiation, rather than for illumination. According to Wien's displacement law, the higher the temperature of an object, the shorter the wavelength of its radiation. Therefore, when the temperature of the filament 12 decreases, the peak wavelength in its radiation spectrum moves to the infrared region, the emitted infrared light increases, and the heating efficiency of the object also increases. This process will be described below.

[0047] In Figure 3a 、 Figure 3b some embodiments shown in the drawings, the filament 12 includes a connecting portion 121 at both ends and a main light-emitting portion 122 in the middle, and the extending directions of the connecting portion 121 and the main light-emitting portion 122 are different. The connecting portion 121 includes a first portion 1211 and a second portion 1212, wherein the first portion 1211 is wound and fixed on the corresponding support column 13, and the second portion 1212 is connected between the first portion 1211 and the main light-emitting portion 122. It should be noted that the connecting portion 121, the main light-emitting portion 122, the first portion 1211, and the second portion 1212 described above are all parts of the filament 12, and their names are only for the purpose of distinguishing them in order to more clearly describe the structures and technical effects of each part in the following text, and the names do not limit their functions. For example, the main light-emitting portion 122 is the part of the filament 12 that mainly emits light, but at least part of the connecting portion 121 also participates in the light-emitting process.

[0048] As Figure 3a 、 Figure 3b shown, since the extending directions of the connecting portion 121 and the main light-emitting portion 122 are different, these two parts can be distinguished from the change in the spatial extending direction of the filament 12 as a whole. In the drawings, the boundary between these two parts is shown by a dashed line a. The first portion 1211 and the second portion 1212 of the connecting portion 121 are distinguished by whether they are wound with the support column 13. Since the length of the support column 13 is difficult to clearly show in the drawings due to the close winding of the filament 12 on the support column 13, the boundary between the first portion 1211 and the second portion 1212 is shown by a dashed line b in the drawings, which can also be understood as showing the position of the end of the support column 13.

[0049] The support column 13 is fixed with the shell 11 through a mounting structure, which can be a part of the shell 11 or a separate structure mounted on the shell 11 in different embodiments, which will be described in more detail in different embodiments below. As shown in Figure 2a , Figure 2b the mounting structure has a first edge m, which is the edge of the mounting structure facing the main light-emitting part 122.

[0050] Since the support column 13 is fixed with the shell 11, and at least two support columns 13 are fixed with the two connecting parts 121 of the filament 12, the support column 13 can support the spatial structure of the filament 12 relative to the shell 11, so that the filament 12 is maintained at a predetermined position in a predetermined shape. In other embodiments not shown, the number of support columns 13 can be more, for example, 3, 5, etc.

[0051] In the embodiments of the present application, at least one support column 13 is one of the following structures:

[0052] (a) The support column 13 is located on the side of the first edge m away from the main light-emitting part 122. It can also be understood that the support column 13 and the main light-emitting part 122 are located on the two sides of the first edge m, respectively. In this way, there is no first part 1211 between the first edge m and the main light-emitting part 122.

[0053] (b) As shown in Figure 2a and Figure 2b , one end of the support column 13 is flush with the first edge m. It can also be understood that the end of the support column 13 just extends to the first edge m. In this way, the first edge m actually also constitutes the boundary between the first part 1211 and the second part 1212. It should be noted that the "flush" in the foregoing and the following of the present application is not in the absolute sense of complete alignment, because there must be assembly errors and molding errors between the parts of the lamp bead 10 in the actual production process, and it is difficult to achieve accurate flush between the one end of the support column 13 and the first edge m. Moreover, the lamp bead 10 emits high temperature in use, and the volume, size and edge position of each part will change due to thermal expansion and contraction during its complete service life. Even if a higher precision flush between the one end of the support column 13 and the first edge m is ensured during production, the two can also be misaligned during use. Therefore, when the end of the support column 13 slightly exceeds or slightly shrinks compared with the first edge m, it should be considered that the two are flush with each other.

[0054] (c) the end of the support column 13 exceeds the first edge m, and the length of the exceeding part is less than or equal to a preset value. The preset value can be regarded as the maximum allowed length of the support column 13 exceeding the first edge m. In some specific embodiments, the preset value can be any one of 0.05 mm, 0.10 mm, 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm, 0.35 mm, 0.40 mm, 0.45 mm, 0.50 mm, 0.55 mm, 0.60 mm, 0.65 mm, 0.70 mm, 0.75 mm, 0.80 mm, 0.85 mm, 0.90 mm, 0.95 mm, 1.00 mm, for example, when the preset value is 0.30 mm, the length of the support column 13 exceeding the first edge m should be less than or equal to 0.30 mm. In other specific embodiments, the preset value can be 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30% of the length of the second part 1212. For example, when the preset value is 25%, the length of the support column 13 exceeding the first edge m should be less than or equal to 25% of the length of the second part 1212.

[0055] In the above various embodiments, the support column 133 is at least one of the structures of (a), (b), and (c), aiming to shorten the length of the first part 1211 between the first edge m and the main light emitting part 122, or to make the first part 1211 not exist between the first edge m and the main light emitting part 122. In this way, the length of the first part 1211 can be shortened as much as possible without changing the overall size and spatial structure of the filament 12, thereby increasing the length of the second part 1212.

[0056] The mounting structure, the support column 13, and the shell 11 together constitute a rigid system, which can be regarded as almost not deformed when subjected to impact force; the filament 12 itself is an elastic system capable of elastic deformation, which can be elastically deformed when subjected to impact force, and the first edge m can be regarded as the junction of the above-mentioned rigid system and elastic system, and the first part 1211 wound on the support column 13 is the connecting part between the above-mentioned elastic system and rigid system.

[0057] When the lamp bead 10 or the device provided with the lamp bead 10 falls, collides or the like in the use process, the external impact force is first transmitted to the shell 11 of the lamp bead 10, and then transmitted to the filament 12 along the support column 13. In the above-mentioned multiple embodiments, compared with the prior art, the length of the first part 1211 is shortened, which is equivalent to increasing the length of the second part 1212, reducing the space limitation on the filament 12, and the increased part of the second part 1212 in length also participates in elastic deformation, so that the elastic system formed by the filament 12 has a larger deformation amplitude, and can buffer a larger impact force in the swinging deformation process. In this way, the filament 12 not only can absorb more impact energy through deformation, but also reduces the stress concentration between the first part 1211 and the support column 13, thereby relieving the risk of brittle fracture of the filament 12. In addition, when the filament 12 has a larger deformation amplitude, under the same impact force, its swinging frequency will be reduced, and the corresponding accumulated fatigue damage will also be reduced, thereby prolonging the service life of the lamp bead 10.

[0058] Especially, since the filament 12 necessarily needs to be fixed with the shell 11 to support its spatial structure in the cavity 111, when the first part 1211 does not exist between the first edge m and the main light-emitting part 122, the proportion of the deformable part of the filament 12 reaches a maximum value, the elasticity of the filament 12 also reaches a maximum value, and the buffering capacity of the lamp bead 10 to the impact force reaches a theoretical maximum value.

[0059] In summary, in the various embodiments of the present application, by shortening the length of the support column 13, reducing the proportion of the first part 1211 in the total length of the filament 12, and increasing the length of the deformable part of the filament 12, the buffering capacity of the lamp bead 10 to the impact force is improved, and the risk of fracture of the filament 12 is reduced.

[0060] It should be noted that the filament 12 is in a high-temperature state when working, and its hardness will decrease significantly, and the mechanical stress it can bear will decrease significantly, and it is more prone to fracture when deformed. In other words, when the deformation amplitude of the filament 12 increases, the fracture probability of the filament 12 in the normal temperature state decreases, but the fracture probability of the filament 12 in the working state increases. Compared with (a) and (b), when the support column 13 adopts the structure (c) in the foregoing embodiments, the part of the support column 13 beyond the first edge m will slightly increase the stiffness of the filament 12, so that the filament 12 is less likely to break in the working state. In actual application, the application scenario of the lamp bead 10, the diameter and hardness of the filament 12 and the like need to be considered to select a reasonable setting mode, so that the deformation amplitude of the filament 12 is in a reasonable range, and the impact resistance in the normal temperature state and the working state is balanced.

[0061] As Figure 1a , Figure 2a , Figure 3aIn some embodiments shown, the support column 13 is directly fixed between the clamping portion 112 of the lamp bead 10, that is, the mounting structure is part of the clamping portion 112. When the shell 11 is heated to a softened state during processing and forming, the support column 13 is inserted into the clamping portion 112, and after the position is adjusted, a preliminary fixation is formed with the clamping portion 112. Then, the shell 11 enters the cooling and shrinking process, and at the same time, the clamping portion 112 is subjected to a certain pressure by the relevant manufacturing equipment. When the clamping portion 112 is cooled and shaped, the support column 13 is tightly embedded and fixed in the clamping portion 112, and the clamping portion 112 seals one end of the cavity 111. As shown in the figure, the junction of the cavity 111 and the clamping portion 112 constitutes the aforementioned first edge m, and the first edge m can also be understood as the edge of the clamping portion 112, that is, the edge of the part that extends into the cavity 111 after the shell 11 is deformed under pressure during the above-mentioned processing. Figure 2a

[0062] The three structures of the aforementioned support column 13 can also be explained as:

[0063] (a) The support column 13 is completely located inside the clamping portion 112 and does not contact the cavity 111 at all.

[0064] (b) The support column 13 is partially located inside the clamping portion 112, and the end thereof pointing to the cavity 111 is flush with the junction m of the clamping portion 112 and the cavity 111, that is, the end thereof just reaches the edge of the cavity 111 but does not enter the interior of the cavity 111.

[0065] (c) The support column 13 is partially located inside the clamping portion 112, and the end thereof pointing to the cavity 111 extends into the cavity 111, and the length of the extended part is less than or equal to a preset value, which can be referred to as described above and will not be repeated.

[0066] In the above (a) and (b), the part of the filament 12 located in the cavity 111 is not directly supported by the support column 13, so that the overall elasticity of the filament 12 reaches the theoretical maximum. The first part 1211 is completely located inside the clamping portion 112 and is fixed by the support column 13 and the clamping portion 112. In the above (c), only the support column 13 with a length less than or equal to the preset value exists in the cavity 111, which increases the stiffness of the filament 12 compared to (a) and (b).

[0067] ​In combination with the aforementioned processing and forming process of the shell 11, it can be seen that in the above embodiment, the clamping portion 112 also wraps the first part 1211 during the cooling and shrinkage process, so that the first part 1211 not only forms point contact with the support column 13, but also forms surface contact with the clamping portion 112. This can greatly increase the force-bearing area of ​​the first part 1211. When the filament 12 is deformed, part of the stress on the first part 1211 is transferred to the clamping portion 112, and the other part is transferred to the support column 13. The stress concentration point between the filament 12 and the support column 13 can be avoided, thereby avoiding the risk of brittle fracture of the filament 12 at the point contact portion with the support column 13.

[0068] In some embodiments, the support column 13 only provides structural support to the filament 12, and the filament 12 is connected to the external circuit through other structures. For example, the end of the filament 12 is directly connected to the electrode 152 of the lamp bead 10, or other conductive structures are provided to form an electrical connection between the filament 12 and the electrode 152.

[0069] In such Figure 1a In some embodiments shown, the support column 13 is a conductor with a lower resistivity than the filament 12. In other words, in addition to structurally supporting the filament 12, the support column 13 also serves as a current path for the filament 12 to pass current. More specifically, the lamp bead 10 further includes at least two molybdenum sheets 151 and at least two electrodes 152. Each molybdenum sheet 151 is positioned within the clamping portion 112 and electrically connected to a corresponding support column 13. Each electrode 152 has one end electrically connected to the corresponding molybdenum sheet 151 and the other end extending from the clamping portion 112 to connect to an external power source.

[0070] Because the resistivity of the support column 13 is lower than that of the filament 12, in the portion where the two contact each other, the current almost exclusively flows through the support column 13 and not through the first portion 1211. This means that the first portion 1211 does not participate in the actual light-emitting process, while the second portion 1212 does. Based on the foregoing, various embodiments of the present application shorten the length of the first portion 1211 and increase the length of the second portion 1212. In addition to the aforementioned changes to the mechanical properties of the lamp bead 10, the electrical and optical properties of the lamp bead 10 are also modified, specifically:

[0071] (1) The actual length of the filament 12 involved in luminescence is longer, which is equivalent to increasing the surface area of ​​the filament 12 and improving the overall luminescence brightness.

[0072] (2) More heating parts of the filament 12 are generated, which is equivalent to increasing the heating power, making it easier to reach and maintain high temperature in the chamber 111, thereby improving the luminous efficiency.

[0073] (3) In some embodiments, the lamp bead 10 is mainly used to generate infrared radiation to heat the irradiated object. The filaments 12 are closely arranged in the main light-emitting part 122, and the heat energy is relatively concentrated, so the temperature is relatively high; the filaments 12 are loosely arranged in the connecting part 121, and the heat energy is easily dispersed, so the temperature is relatively low (compared with the main light-emitting part 122). According to the aforementioned Wien's displacement law, when the length of the second part 1212 increases, the infrared radiation power of the lamp bead 10 increases, and the heating speed of the object is faster. In other words, when the main function of the lamp bead 10 is to output infrared radiation, the optimized mode in the above-mentioned embodiments of the application can increase the infrared radiation power.

[0074] In some more specific embodiments, the support column 13 is a molybdenum column, and one end of the molybdenum column is electrically connected to the molybdenum sheet 151 through welding and / or the pre-pressure of the pinch seal part 112. The melting point of molybdenum is about 2623°C, which is higher than the temperature when the filaments 12 emit light, so it is suitable for high-temperature filaments 12 and will not be melted and deformed. In addition, molybdenum also has the advantages of high mechanical strength, stable chemical properties, and low resistivity, and is an ideal support material for the filaments 12. In particular, the expansion coefficient of molybdenum is similar to that of glass, and in the working state of the lamp bead 10, molybdenum and glass will simultaneously expand or contract due to heat, and the difference in thermal expansion between the two is small, which can effectively reduce the generation of thermal stress and avoid cracks or damage at the glass sealing part, thereby maintaining the airtightness of the lamp bead 10.

[0075] As shown in some embodiments of the application, Figure 1b , Figure 2b , Figure 3b The mounting structure includes at least two fixed arms 14. The fixed arms 14 are fixed to each other with the shell 11, and the support column 13 is fixed on the fixed arms 14, and the edge of the fixed arms 14 towards the edge of the main light-emitting part 122 is the first edge m. The fixed arms 14 are a strip-shaped structure, and the rigidity of the fixed arms 14 is less than that of the shell 11, and the fixed arms 14 have a certain elasticity. Therefore, by fixing the support column 13 through the fixed arms 14, the connection rigidity between the support column 13 and the shell 11 can be reduced, thereby improving the shock resistance of the filaments 12. Other technical effects of reducing the length of the first part 1211, increasing the elasticity of the filaments 12, and reducing the risk of brittle fracture can be referred to the foregoing description, and will not be described here.

[0076] Compared with the embodiment shown in Figure 1a , Figure 1bIn the illustrated embodiment, the support column 13 is secured by a fixed arm 14 extending into the chamber 111, thereby supporting the spatial structure of the filament 12. This allows the filament 12 to be positioned higher within the chamber 111 (or, alternatively, farther from the pinch seal 112), thereby meeting the various optical design requirements of the lamp bead 10. Furthermore, because the filament 12 is supported and secured by the fixed arm 14, it is completely absent from the pinch seal 112. This prevents compression of the filament 12 during the formation of the pinch seal 112, which could lead to internal stress or localized structural deformation.

[0077] like Figure 1b As shown, in some embodiments, the fixed arm 14 is a conductor and is connected between the filament 12 and the electrode 152, forming a current path for inputting current to the filament 12. In a more specific embodiment, the fixed arm 14 is also formed of molybdenum, and the related technical effects are not repeated.

[0078] like Figure 1b As shown, in some embodiments, a portion of the fixed arm 14 is located within the clamping portion 112 and is fixed to the clamping portion 112. The fixing method can refer to the molding process of the clamping portion 112 described above. The fixed arm 14 is embedded in the clamping portion 112 and fixed by cooling, shrinking, and external pressure. The other portion of the fixed arm 14 extends into the interior of the chamber 111 and is fixed to the support column 13, thereby supporting the spatial structure of the filament 12 in the chamber 111.

[0079] exist Figure 3a 、 Figure 3b In the illustrated embodiments, the filament 12 in the lamp bead 10 has a double helix structure, that is, at least a portion of the filament 12 is formed by two spiral windings.

[0080] In the same accommodating space, the primary spiral filament has a longer actual length than the straight filament, and due to the spiral shape, the adjacent spiral turns are in close contact with each other, the heat aggregation effect is more obvious, and the filament is easy to maintain a high temperature, so it has a higher light emitting power. Further, in the same accommodating space, the secondary spiral filament has a longer length than the primary spiral filament, and has a higher light emitting power. However, compared with the straight filament, the strength of the primary spiral filament and the secondary spiral filament decreases in turn, and the elasticity increases in turn. In the illustrated embodiment, the connecting part 121 corresponds to the primary spiral structure and has higher strength, mainly serving as a support and a connection; the main light emitting part 122 corresponds to the secondary spiral structure and has higher light emitting efficiency, mainly serving as a light emitting part. The extension directions of the connecting part 121 and the main light emitting part 122 are different, which can be understood as that the filament 12 extends in a bent shape, the extension directions of the bent parts are different, thereby distinguishing the connecting part 121 and the main light emitting part 122; or it can be understood that the extension directions of the spiral structures of the filament 12 in space are different, and the part connecting the primary spiral and the secondary spiral can be regarded as the part where the extension direction of the filament 12 changes, thereby distinguishing the connecting part 121 and the main light emitting part 122.

[0081] Specifically, in the process of forming the filament 12, the whole is first wound once to form a primary spiral, and then the middle part is wound again to form a secondary spiral. Among them, the main light emitting part 122 is located in the cavity 111 of the shell 11. The end of the connecting part 121 is wound and fixed on the support column 13, and the wound and fixed part is located in the clamping part 112. It should be noted that the connecting part 121 and the main light emitting part 122 in the present application are only for clear description, and the actual connecting part 121 is a primary spiral wound once, and the main light emitting part 122 includes a primary spiral and a secondary spiral.

[0082] The comparison of the above filament shapes is based on the premise that the filament diameters are the same, but in the field, generally, a straight filament or a single spiral filament with a relatively thick diameter is used in a relatively large size lamp bead, and the strength of the filament itself is sufficient to support the spatial structure of the filament, without the need for a support column to support. A double spiral filament with a relatively thin diameter is used in a relatively small size lamp bead, and the strength of the filament itself is insufficient to support the spatial structure of the filament, and a support column is needed to support the spatial structure of the filament, but it also brings the problem that the rigidity of the filament and the support column is greatly different, and the connecting point between the two is easy to break when impacted. The multiple embodiments of the present application mainly improve the shortcomings of the above double spiral filament.

[0083] As Figure 2aIn some embodiments, as described above, when the structure of the support column 13 is (b) or (c), the support column 13 supports the first part 1211 in the pinch seal part 112, on the one hand, to fix the support column 13 and the filament 12, and on the other hand, to support the first part 1211 during the forming of the pinch seal part 112, so as to avoid the deformation of the helical structure of the first part 1211. In addition, since the first part 1211 does not participate in the light emitting process and will not generate heat, when the structure of the support column 13 is (b) or (c), the heat generated by the pinch seal part 112 can be avoided to affect the air tightness.

[0084] In some embodiments not shown, the part of the filament 12 in the cavity 111 is the main light emitting part 122, and the part in the pinch seal part 112 is the connecting part 121. It can also be understood that the connecting part 121 does not exist in the cavity 111 of the shell 11, and is completely located in the pinch seal part 112 and only plays a connecting and supporting role. In this way, the length of the filament 12 in the cavity 111 can be maximized. Since the main light emitting part 122 has higher elasticity and higher light emitting efficiency, the light emitting efficiency and elasticity of the lamp bead 10 can be maximized at the same time. It can also be understood that the connecting part 121 of the filament 12 does not include the second part 1212, but only includes the first part 1211.

[0085] In some specific embodiments, the forming process of the filament 12 is as follows:

[0086] (1) The filament 12 is wound on the core wire to form a primary helical structure. During this process, the diameter of the core wire is the diameter of the primary helical structure of the filament 12. In some more specific ways, the core wire wound with the filament 12 is wound again to form a secondary helical structure. During the forming of the primary helical structure and the secondary helical structure of the filament 12, the core wire plays a supporting role to avoid the filament 12 from being broken under stress and to ensure that the diameter of the helical structure does not change.

[0087] (2) The part of the core wire corresponding to the main light emitting part 122 and the second part 1212 of the filament 12, which can participate in the actual light emitting process, is removed. The part of the core wire that is not removed and remains wound with the filament 12 constitutes the aforementioned support column 13, and the part wound with the support column 13 is the first part 1211.

[0088] In some more specific embodiments, the core wire is formed of molybdenum. The characteristics of molybdenum can be referred to the description above.

[0089] In the field, the lamp beads can be roughly divided into horizontal filaments and axial (longitudinal) filaments according to the filament direction, the horizontal filament is that the filament extends along the direction perpendicular to the axis of the lamp bead, and the axial (longitudinal) filament is that the filament extends along the direction parallel to the axis of the lamp bead. In various embodiments of the present application, the lamp bead 10 with horizontal filaments 12 is mainly involved. Specifically, the main light-emitting part 122 extends along a direction substantially perpendicular to the connecting part 121, and the distance between the two ends of the main light-emitting part 122 and the clamping part 112 is substantially the same, so the lengths and structures of the two connecting parts 121 are the same. It can also be understood that, from the overall extension direction of the filament 12, the part extending horizontally is the main light-emitting part 122, and the part extending longitudinally is the connecting part 121. Here, longitudinal and horizontal refer to the axis of the lamp bead 10.

[0090] In combination with some of the foregoing embodiments, the possibility of the entire filament 12 breaking is reduced due to the reduction in the length of the support column 13. Moreover, since the lengths and structures of the two connecting parts 121 are the same, there is no obvious difference in strength between the two connecting parts 121, and when the filament 12 is elastically deformed under stress, the two connecting parts 121 can uniformly share the mechanical stress to avoid breaking.

[0091] In some embodiments, the number of support columns 13 is two, and the filament 12 is only structurally supported by the two support columns 13. In combination with some of the foregoing embodiments, the two support columns 13 also respectively constitute the positive and negative poles of the filament 12 and are electrically connected to the outside. When the number of support columns 13 is two, the limitation on the deformation of the filament 12 is reduced under the premise of meeting the need for three-dimensional structural support of the filament 12, and compared with the filament 12 supported by a larger number of support structures, the filament 12 supported only by two support columns 13 has higher elasticity and can be elastically deformed in a larger range, thereby reducing the possibility of the filament 12 breaking as much as possible.

[0092] As shown in Figure 4 , Figure 5 Some embodiments of the present application also provide a radiation device 20 capable of generating infrared radiation and directly heating the target object irradiated by heat radiation when a power supply is turned on. The radiation device 20 comprises one or more lamp beads 10 as described above and one or more light cups 21. Among them, the light cup 21 can be provided for the lamp bead 10. When the lamp bead 10 emits light, the light cup 21 can guide the light emitted by the lamp bead 10 to a preset direction and / or change the diffusion angle of the light emitted by the lamp bead 10, so that the light emitted by the lamp bead 10 can irradiate the target object along a preset path.

[0093] According to the foregoing, the lamp bead 10 of the radiation device 20 has stronger buffering capacity for impact force, and the risk of breakage of the filament 12 is smaller. In particular, when the radiation device 20 falls or collides, the filament 12 can bear a larger impact force without breaking, so that the radiation device 20 can cope with more complex use environments.

[0094] In some specific embodiments, the inner surface of the light cup 21 is designed in a parabolic shape, so that the light emitted by the lamp bead 10 becomes a light beam with a preset diffusion angle and / or a preset direction after reflection. As shown in Figure 4 The parabolic surface of the light cup 21 has a preset focal plane f, which is a virtual plane, and the focal point of the parabolic surface of the light cup 21 is located on the focal plane f. When the light source is located on the focal plane f, the light is reflected by the parabolic surface and forms a preset size and relatively uniform irradiation area on the target object. The actual light-emitting part in the lamp bead 10 is the filament 12, which is not a point structure but a linear structure with a certain length in space. In combination with some of the foregoing embodiments, the lamp bead 10 adopts a transverse filament 12, and when it is correctly installed in the light cup 21, most of the filament 12 (at least including the aforementioned main light-emitting part 122) is located on and extends along the focal plane f, and / or part of the filament 12 (at least including the aforementioned main light-emitting part 122) is symmetrical to the focal plane f and uniformly distributed on both sides of the focal plane f. In this way, the light emitted by the lamp bead 10 can be maximized to form a preset light field, achieving uniform and efficient irradiation of the target object.

[0095] A radiation device 20 with only one lamp bead 10 and one light cup 21 is shown in Figure 4

[0096] A radiation device 20 with multiple lamp beads 10 and multiple light cups 21 is shown in Figure 5 The multiple light cups 21 can be arranged along a preset shape (such as a circular ring, a regular polygon, or an array), so that the radiation device 20 forms a preset light field and / or a preset size light spot at a preset distance, and the light of at least two lamp beads 10 can cover the same area on the light spot. Thus, the purpose of simultaneously heating a region by multiple lamp beads 10 is achieved, and the radiation device 20 has a higher heating efficiency.

[0097] As shown in Figure 4 or Figure 5 ​As shown, in some specific embodiments, the radiation device 20 further includes a substrate 22, and the reflector 21 and the lamp bead 10 are respectively mounted on the substrate 22, with a gap reserved between the reflector 21 and the lamp bead 10, so they are not directly mounted. Because the lamp bead 10 is spatially located within the area enclosed by the reflector 21, when the radiation device 20 is impacted, the impact force is transmitted along the path of the reflector 21-substrate 22-lamp bead 10, rather than being directly transmitted from the reflector 21 to the lamp bead 10. This prolongs the force transmission path (compared to directly mounting the lamp bead 10 and the reflector 21), thereby reducing the impact force received by the lamp bead 10 and further improving the impact resistance of the lamp bead 10.

[0098] In some embodiments, substrate 22 is a circuit board. Lamp bead 10 includes electrodes 152 fixed to clamping portion 112. Electrodes 152 and substrate 22 are mounted and electrically connected to each other. Substrate 22 not only provides structural support and fixation for lamp bead 10, but also supplies current to lamp bead 10 through electrodes 152.

[0099] In some embodiments, the radiation device 20 is a module that provides radiation function and needs to be integrated into other devices for use, such as the drying device 30 described below. The radiation device 20 itself does not have a complete housing, but is a part of other devices.

[0100] In some embodiments not shown, the radiation device 20 further comprises a complete housing, a power supply module, and operating buttons. The power supply module may include a rechargeable battery or a power cord. When a user operates the radiation source 20, they can control its on / off function or further control the radiation power by operating the buttons. This can be used for heating, physical therapy, lighting, and other scenarios.

[0101] like Figure 6 As shown, some embodiments of the present application further provide a drying device 30, including a housing 31, a wind assembly 33, a power supply and the aforementioned lamp beads 10, and the power supply is electrically connected to the wind assembly 33 and the lamp beads 10. An air duct 32 is provided in the housing 31, and the wind assembly 33 is located in the housing 31 and is used to generate airflow in the air duct 32. The lamp beads 10 emit heat radiation when in operation. When the drying device 30 is in operation, it can simultaneously deliver airflow and heat radiation to the target object to promote the evaporation of moisture in the target object, thereby achieving the purpose of rapid drying. It should be noted that the drying device 30 in the present application is not limited to a device that must be dried. For example, the user can also use the heat radiation and airflow provided by the drying device 30 to heat and style hair with less water content, or the user can use the drying device 30 as a heating device. The use is not necessarily accompanied by a "drying" process, nor does it necessarily achieve a "drying" effect.

[0102] In some embodiments, the drying device 30 includes the aforementioned reflective cup 21, and the number of reflective cups 21 is adapted to the number of lamp beads 10, and its function is not repeated here. It can also be understood that the drying device 30 includes the aforementioned radiation device 20. More specifically, as Figure 4 and Figure 5 As shown, the radiation device 20 of the drying device 30 has a plurality of lamp beads 10 arranged along a ring, and the reflective cup 21 is arranged along a ring accordingly. The middle area of ​​the ring is left empty to form an air duct 32, or the air duct 32 can be installed, so that the radiation field formed by the drying device 30 when in use is surrounded by the outer edge of the air flow, ensuring that the two can act on the target object at the same time.

[0103] In some specific embodiments, the drying device 30 is a hair dryer, and the housing 31 includes a body 311 and a handle 312. The wind assembly 33 and the lamp beads 10 are both located in the body 311. The user can hold the handle 312 of the drying device 30 to blow the hair, and the airflow and heat radiation can act on the hair simultaneously to promote rapid evaporation of moisture.

[0104] As a handheld device, users may encounter problems such as bumps and drops when using the drying device 30. Referring to the aforementioned embodiments of the present application, due to the structural optimization of the lamp bead 10 and the shortening of the length of the support column 13, the filament 12 can better absorb and disperse the impact force when subjected to external force, reducing the possibility of the filament 12 breaking after the impact. Therefore, the drying device 30 in each embodiment of the present application greatly reduces the risk of damage to the lamp bead 10 due to vibration or collision during use, thereby improving the durability and reliability of the drying device 30.

[0105] In some more specific embodiments, the drying device 30 further includes a drop detection circuit and a control circuit. The drop detection circuit transmits a drop signal upon detecting that the drying device 30 is in a falling state. Upon receiving the drop signal, the control circuit cuts off power to the lamp 10. The drop detection circuit can be implemented using an acceleration sensor. When the drying device 30 is held in hand or placed on a table, it is constantly subject to gravitational acceleration, which is approximately g. When the acceleration is detected to rapidly decrease from g to near zero, the drying device 30 is considered to be in a falling state. At this point, the drop detection circuit transmits a drop signal, and the control circuit powers off the lamp 10, ensuring that the drying device 30 is in a turned-off state when it lands. In other embodiments, the drying device 30 can also be detected by detecting its acceleration in various directions to determine whether it is in high-speed motion (e.g., being thrown or ejected from a high-speed vehicle). If it is in high-speed motion, the power to the lamp 10 is also cut off, thereby preventing potential damage to the lamp 10 from a violent collision.

[0106] Since there is a significant difference in the hardness of the filament 12 during operation (high temperature state) and at room temperature, its hardness will decrease significantly as the temperature rises. The drying device 30 can immediately cut off the power supply to the lamp bead 10 when a fall occurs, and convert the collision of the lamp bead 10 in the high temperature state into a collision of the lamp bead 10 in the room temperature state, thereby avoiding the risk of the lamp bead 10 being broken by the fall and impact during operation. In addition, in combination with some of the aforementioned embodiments, the lamp bead 10 in the present application has optimized the structure of the filament 11 and the support column 13, and has better anti-collision performance than the prior art. Therefore, the drying device 30 in the present application can effectively reduce the risk of damage during use, especially ensure the safety of the lamp bead 10 in unexpected situations, thereby improving the durability of the drying equipment 30 and the user experience.

[0107] like Figure 6 As shown, the drying device 30 has a circuit assembly 34, which is equipped with relevant power control, start-stop control, sensor and other modules. The aforementioned power supply, drop detection circuit, and control circuit can all be regarded as one or more circuit modules on the circuit assembly 34. The figure is only for illustration, and the specific structure and circuit principle are not the focus of this application. The circuit assembly 34 can be located in the handle 312 or in the main body 311. The circuit assembly 34 can also be composed of a plurality of circuits electrically connected to each other, and these circuits are respectively located in the handle 312 and the handle 311.

[0108] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example" or "some examples" means that the specific features, structures, orientations, positions, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, orientations, positions, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0109] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A lamp bead, characterized in that: include: A housing, the housing being a light-transmitting structure and comprising a sealed chamber; At least two support columns; a filament, wherein the filament is at least partially located in the chamber, the filament comprising a main light-emitting portion located in the middle and two connecting portions located at both ends, the connecting portions extending in a different direction from the main light-emitting portion, the connecting portions comprising a first portion wound and fixed around the corresponding support column, and a second portion located between the first portion and the main light-emitting portion; a mounting structure, the mounting structure being a part of the housing or mounted on the housing, each of the support columns being mounted on the mounting structure, and an edge of the mounting structure facing the main light-emitting portion being a first edge; Wherein, at least one of the support columns is one of the following structures: The supporting column is entirely located on a side of the first edge away from the main light-emitting portion; One end of the support column is flush with the first edge; One end of the support column extends beyond the first edge, and a length of the extending portion is less than or equal to a preset value, which is 1 mm or 30% of the length of the second portion.

2. The lamp bead according to claim 1, characterized in that: The filament is a double helix structure, wherein: The connecting portion is a primary spiral structure formed by a single winding of the filament; The main light-emitting portion is a secondary spiral structure formed by winding the filament again after forming a primary spiral.

3. The lamp bead according to claim 2, characterized in that: The filament is wound on a core wire to form the primary spiral structure. After a preset portion of the core wire is removed, the remaining portion constitutes each of the support columns.

4. The lamp bead according to claim 3, characterized in that: The core wire is formed of molybdenum.

5. The lamp bead according to claim 1, characterized in that: The main light emitting portion extends in a direction substantially perpendicular to the connecting portion; and / or, The two connecting parts have the same length and / or structure.

6. The lamp bead according to claim 1, characterized in that: There are two support columns, and the filament is supported by the two support columns.

7. The lamp bead according to claim 1, characterized in that: The entire portion of the filament located in the chamber serves as the main light-emitting portion.

8. The lamp bead according to any one of claims 1 to 7, characterized in that: The shell includes a clamping portion, at least part of the support column is located inside the clamping portion and fixed to the clamping portion, the mounting structure is a part of the clamping portion, and the junction of the clamping portion and the chamber constitutes the first edge.

9. The lamp bead according to claim 8, characterized in that: The support column is a conductor and has a resistivity lower than that of the filament; the lamp bead further comprises: at least two molybdenum sheets, each of which is located within the clamping portion and electrically connected to the corresponding support pillars; At least two electrodes, one end of each electrode is electrically connected to the corresponding molybdenum sheet, and the other end of each electrode passes through the clamping portion.

10. The lamp bead according to claim 9, characterized in that: The support column is a molybdenum column, and one end of the molybdenum column is electrically connected to the molybdenum sheet through welding and / or the pre-pressure of the clamping portion.

11. The lamp bead according to any one of claims 1 to 7, characterized in that: The mounting structure includes at least two fixing arms, the fixing arms are fixed to the housing, and the supporting columns are fixed to the corresponding fixing arms.

12. The lamp bead according to claim 11, characterized in that: The fixed arm is a conductor, and the fixed arm is connected between the filament and the electrode of the lamp bead.

13. The lamp bead according to claim 11, characterized in that: The shell includes a clamping seal portion, a portion of the fixing arm is located inside the clamping seal portion and fixed to the clamping seal portion, and another portion of the fixing arm extends into the cavity and is fixed to the corresponding support column.

14. The lamp bead according to claim 1, characterized in that: One end of the support column extends beyond the first edge, and a length of the extending portion is any one of 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, and 30% of the length of the second portion.

15. A radiation device for generating infrared radiation, characterized in that include: One or more lamp beads according to any one of claims 1 to 14; One or more reflective cups, each of which can be used to mount the lamp bead, and the reflective cup is configured to guide the light emitted by the lamp bead to a preset direction and / or change the diffusion angle of the light emitted by the lamp bead.

16. The radiation device according to claim 15, characterized in that The reflective cup has a preset focal plane; When the lamp bead is mounted on the reflective cup, at least a portion of the filament extends along the focal plane, and / or at least a portion of the filament is symmetrical with respect to the focal plane.

17. The radiation device according to claim 15, characterized in that It also includes a substrate, the reflective cup and the substrate are mounted on each other; the lamp bead has an electrode, and the electrode and the substrate are mounted on each other.

18. A drying device, characterized in that: include: a housing, wherein an air duct is provided in the housing; a wind power assembly, located in the housing and configured to generate airflow in the air duct; The lamp bead according to any one of claims 1 to 14; A power supply electrically connects the wind power component and the lamp beads.

19. The drying device according to claim 18, characterized in that Also includes: A drop detection circuit is configured to: send a drop signal when detecting that the drying device is in a drop state; The control circuit is configured to cut off the power supply to the lamp bead after receiving the drop signal.

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