Lamp bead, radiation device and drying device

Abstract

The invention 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, and in particular to a lamp bead, a radiation device and a drying device. Background Art

[0002] The light-emitting principle of incandescent lamps is to energize the filament to heat it to an incandescent state and emit light. The filament of an incandescent lamp is generally made of a thin tungsten wire, and the filament is supported and fixed in the bulb shell by a related fixing structure.

[0003] Since the filament itself is relatively fragile, when the incandescent lamp is subjected to impact or vibration, the part connected to the fixed structure is easily broken, causing damage to the incandescent lamp. Summary of the invention

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

[0005] The present application provides a lamp bead, comprising: a shell, the shell being a light-transmitting structure, the shell comprising a sealed chamber; at least two supporting columns; a filament, the filament being 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 portion and the main light-emitting portion extending in different directions, the connecting portion comprising a first portion wound and fixed on the corresponding supporting 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 shell or mounted on the shell, each supporting column being mounted on the mounting structure, and the edge of the mounting structure facing the main light-emitting portion being a first edge; wherein at least one supporting column is one of the following structures:

[0006] The supporting column is entirely located on a side of the first edge away from the main light-emitting portion;

[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 portion is less than or equal to a preset value, which is 1 mm or 30% of the length of the second portion.

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

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

[0011] The main light emitting part is a secondary spiral structure formed by winding the filament again after forming a primary spiral.

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

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

[0014] Optionally, the main light-emitting portion extends in a direction substantially perpendicular to the connecting portion, and / or the two connecting portions have the same length and structure.

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

[0016] Optionally, the entire portion of the filament located in the chamber is the main light-emitting portion.

[0017] Optionally, 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 between the clamping portion and the chamber constitutes the first edge.

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

[0019] At least two molybdenum sheets, the molybdenum sheets are located in the clamping portion and are electrically connected to the corresponding support pillars;

[0020] At least two electrodes, one end of each electrode is electrically connected to a corresponding molybdenum sheet, and the other end of each electrode passes through the clamping portion.

[0021] Optionally, 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.

[0022] Optionally, the mounting structure includes at least two fixed arms, the fixed arms are fixed to the shell, and the support column is fixed to the fixed arms.

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

[0024] Optionally, 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 chamber and is fixed to the corresponding supporting column.

[0025] Optionally, one end of the support column extends beyond the first edge, and the 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.

[0026] The present application also provides a radiation device for generating infrared radiation, characterized in that it includes: one or more lamp beads as described above; one or more reflective cups, each of which can be used to install 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.

[0027] Optionally, the reflective cup has a preset focal plane; when the lamp bead is installed on the reflective cup, at least part of the filament extends along the focal plane, and / or at least part of the filament is symmetrical with respect to the focal plane.

[0028] Optionally, the radiation device further includes a substrate, and 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.

[0029] The present application also provides a drying device, comprising: a shell, in which an air duct is provided; a wind power component, located in the shell and used to generate airflow in the air duct; the aforementioned lamp beads; and a power source, electrically connecting the wind power component and the lamp beads.

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

[0031] The lamp bead, radiation device and drying device in the present application reduce the system stiffness of the filament by shortening the length of the supporting column in the lamp bead, thereby improving the elasticity of the filament, increasing the filament's ability to buffer impact force, and reducing the risk of brittle fracture of the filament.

[0032] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1a , Figure 1b It is a schematic diagram of the structure of the lamp beads in different embodiments of the present application;

[0035] Figure 2a A cross-sectional schematic diagram of a filament and a support column in certain embodiments of the present application;

[0036] Figure 2b for Figure 1b A local enlarged schematic diagram of the middle A;

[0037] Figure 3a , Figure 3b Schematic diagram of the structure of the filament in different embodiments of the present application;

[0038] Figure 4 , Figure 5 It is a schematic structural diagram of a radiation device in some embodiments of the present application;

[0039] Figure 6 This is a schematic diagram of the structure of a drying device in certain embodiments of the present application. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying 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 terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

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

[0044] The disclosure of this article provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described herein. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the various specific processes and examples of materials provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0045] like Figure 1a As shown, in some embodiments of the present application, a lamp bead 10 is provided, including 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 includes 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 external 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, which can also be easily understood as a vacuum, low pressure, and halogen gas filled area. A certain structure located in the chamber 111 means that the structure is located in a vacuum, low pressure, and halogen gas filled area.

[0046] The filament 12 is at least partially located in the chamber 111, and is directly or indirectly electrically connected to the electrode 152. When an external power supply passes current to the filament 12 through the motor 152, the filament 12 rapidly heats up due to resistance until it reaches an incandescent state (about 2000°C-3000°C) and emits visible light. Since the housing 11 is a light-transmitting structure, light can be transmitted from the housing 11. The spectrum of an incandescent lamp is close to a continuous spectrum, roughly including all visible light from red to purple, and also including infrared light and ultraviolet light. In some embodiments of the present application, the lamp bead 10 is mainly used to emit infrared light, directly heating the irradiated object in the form of thermal radiation, rather than for lighting. 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 infrared light emitted increases, and the heating efficiency of the object also increases accordingly. This process will be described below.

[0047] exist Figure 3a , Figure 3b In some of the embodiments shown, the filament 12 includes a connecting portion 121 located at both ends and a main light-emitting portion 122 located in the middle, and the connecting portion 121 and the main light-emitting portion 122 extend in different directions. 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 are all parts of the filament 12, and their names are only for distinction, so as to more clearly describe the structure 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] like Figure 3a , Figure 3b As shown, since the connecting portion 121 and the main light-emitting portion 122 extend in different directions, the two portions can be distinguished from the change in the spatial extension direction of the filament 12 as a whole. The boundary between the two portions is shown by the dotted line a in the figure. The first portion 1211 and the second portion 1212 on the connecting portion 121 are distinguished by whether they are intertwined with the support column 13. Since the filament 12 is tightly wound around the support column 13, it is difficult to clearly show the length of the support column 13 in the figure. In the figure, the boundary between the first portion 1211 and the second portion 1212 is shown by the dotted line b, which can also be understood as the dotted line b showing the position of the end of the support column 13.

[0049] The support column 13 is fixed to the housing 11 via a mounting structure. In different embodiments, the mounting structure may be a part of the housing 11 or an independent structure mounted on the housing 11. This will be described in more detail in the following different embodiments. Figure 2a , Figure 2b As shown, the mounting structure has a first edge m, and the first edge m is the edge of the mounting structure facing the main light-emitting portion 122 .

[0050] Since the support column 13 and the housing 11 are fixed to each other, and at least two support columns 13 are fixed to the two connecting portions 121 of the filament 12, the support column 13 can support the spatial structure of the filament 12 relative to the housing 11, so that the filament 12 is maintained at a preset position in a preset shape. In other embodiments not shown, the number of support columns 13 can be more, such as 3, 5, etc.

[0051] In various 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 portion 122. It can also be understood that the support column 13 and the main light emitting portion 122 are respectively located on both sides of the first edge m. In this way, there is no first portion 1211 between the first edge m and the main light emitting portion 122.

[0053] (b) Reference Figure 2a and Figure 2b As shown, 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 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 text of this application is not completely aligned in an absolute sense. Since there must be assembly errors and molding errors between the various parts of the lamp bead 10 during the actual production process, it is difficult to achieve precise flushing between one end of the support column 13 and the first edge m. In addition, the lamp bead 10 generates high temperature during use, and each part will change in volume, size, and edge position due to thermal expansion and contraction during its complete service life. Even if a high-precision flushing between one end of the support column 13 and the first edge m is guaranteed during production, the two may be misaligned during use. Therefore, when the end of the support column 13 is slightly beyond or slightly retracted compared to the first edge m, the two should be regarded as flush with each other.

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

[0055] In each of the above embodiments, the support column 133 is at least one of the structures (a), (b), and (c), the purpose of which is to shorten the length of the first portion 1211 between the first edge m and the main light-emitting portion 122, or to make the first portion 1211 not exist between the first edge m and the main light-emitting portion 122. In this way, the length of the first portion 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 portion 1212.

[0056] The mounting structure, the support column 13 and the shell 11 together constitute a rigid system, which can be regarded as hardly deforming when subjected to impact force; the filament 12 itself is an elastic system capable of elastic deformation, which can undergo elastic deformation when subjected to impact force, and the first edge m can be regarded as the junction between the above-mentioned rigid system and the elastic system, and the first part 1211 wrapped around the support column 13 is the connecting part between the above-mentioned elastic system and the rigid system.

[0057] During the use of the lamp bead 10, when the lamp bead 10 or the equipment equipped with the lamp bead 10 falls, collides, or other unexpected situations occur, the external impact force is first transmitted to the housing 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 spatial limitation of the filament 12, and the increased part of the second part 1212 in length also participates in elastic deformation, which can make the elastic system composed of the filament 12 have a larger deformation amplitude, and can buffer a larger impact force during the swing deformation process. In this way, the filament 12 can not only absorb more impact energy through deformation, but also reduce the stress concentration between the first part 1211 and the support column 13, thereby alleviating the risk of brittle fracture of the filament 12. In addition, when the filament 12 has a larger deformation amplitude, under the premise of the same impact force, its swing frequency will be reduced, and the corresponding accumulated fatigue damage will also be reduced, thereby extending the service life of the lamp bead 10.

[0058] In particular, since the filament 12 must be fixed to the shell 11 to support its spatial structure in the chamber 111, when there is no first part 1211 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 ability of the lamp bead 10 against impact force reaches a theoretical maximum value.

[0059] To sum up, in 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 impact buffering ability of the lamp bead 10 is improved, thereby reducing the risk of breakage of the filament 12.

[0060] It should be noted that the filament 12 is in a high temperature state when working, and its hardness will decrease significantly, the mechanical stress it can bear will decrease significantly, and it is more likely to break when deformed. In other words, when the deformable amplitude of the filament 12 increases, the possibility of its breakage at room temperature decreases, but the possibility of its breakage in the working state increases. Compared with (a) and (b), when the support column 13 adopts the (c) structure in the aforementioned embodiment, the part thereof that exceeds the first edge m will slightly increase the rigidity of the filament 12, making the filament 12 less likely to break in the working state. In practical applications, it is necessary to comprehensively consider the application scenario of the lamp bead 10, the diameter and hardness of the filament 12 and other conditions to select a reasonable setting method, so that the deformable amplitude of the filament 12 is within a reasonable range, and the impact resistance under normal temperature and working conditions is balanced.

[0061] like Figure 1a , Figure 2a , Figure 3aIn some of the embodiments shown, the support column 13 is directly fixed to the clamping portion 112 of the lamp bead 10, that is, the mounting structure is a part of the clamping portion 112. The shell 11 is heated to a softened state during processing and forming, and the support column 13 is inserted into the clamping portion 112. After adjusting the position, it is initially fixed to the clamping portion 112, and then the shell 11 enters a cooling and shrinking process. At the same time, a certain pressure is applied to the clamping portion 112 through relevant manufacturing equipment. When the clamping portion 112 is cooled and formed, the support column 13 is tightly embedded and fixed in the clamping portion 112, and the clamping portion 112 closes one end of the chamber 111. Figure 2a As shown, the boundary between the chamber 111 and the clamping portion 112 constitutes the aforementioned first edge m, which can also be understood as the edge of the clamping portion 112, that is, the edge of the portion extending into the chamber 111 after the shell 11 is pressurized and deformed during the above processing.

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

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

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

[0065] (c) The support column 13 is partially located inside the clamping portion 112, and its end pointing to the chamber 111 extends into the chamber 111, and the length of the extended portion is less than or equal to a preset value. The preset value 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 chamber 111 is not directly supported by the support column 13, so that the overall elasticity of the filament 12 reaches the theoretical maximum value. 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), there is only a support column 13 with a length less than or equal to the preset value in the chamber 111, which increases the rigidity 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-mentioned embodiment, the clamping portion 112 also wraps the first part 1211 during the cooling and shrinking 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. In this way, the force-bearing area of ​​the first part 1211 can be greatly increased. When the filament 12 is deformed, part of the stress on the first part 1211 is transmitted to the clamping portion 112, and the other part is transmitted to the support column 13, which can avoid the stress concentration point between the filament 12 and the support column 13, 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 an 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 and has a resistivity lower than that of the filament 12, that is, the support column 13 not only supports the filament 12 in structure, but 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 of which is located in the clamping portion 112 and is electrically connected to the corresponding support column 13, and one end of each electrode 152 is electrically connected to the corresponding molybdenum sheet 151, and the other end passes through the clamping portion 112 to connect to an external power source.

[0070] Since the resistivity of the support column 13 is lower than that of the filament 12, in the portion where the two are in contact with each other, the current almost only passes through the support column 13 and not through the first portion 1211, that is, the first portion 1211 does not participate in the actual light-emitting process, while the second portion 1212 participates in the actual light-emitting process. According to the foregoing content, in multiple embodiments of the present application, the length of the first portion 1211 is shortened and the length of the second portion 1212 is increased. 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 changed, specifically including:

[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) The filament 12 generates more heat, which is equivalent to increasing the heating power, making it easier to reach and maintain a 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 portion 122, the heat energy is more concentrated, and its temperature is higher; the filaments 12 are loosely arranged in the connecting portion 121, the heat energy is easily dispersed, and its temperature is lower (compared to the main light-emitting portion 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 optimization method in the above-mentioned multiple embodiments of the present 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 pre-pressure of the clamping portion 112. The melting point of molybdenum is about 2623°C, which is higher than the temperature when the filament 12 emits light, so it adapts to the high-temperature filament 12 without being melted and deformed. In addition, molybdenum has the advantages of high mechanical strength, stable chemical properties, and low resistivity, and is an ideal support material for the filament 12. In particular, the expansion coefficient of molybdenum is similar to that of glass. When the lamp bead 10 is in working state, molybdenum and glass will expand or contract due to heat at the same time. The difference in thermal expansion between the two is small, which can effectively reduce the generation of thermal stress, avoid cracks or damage in the glass seal, and maintain the airtightness of the lamp bead 10.

[0075] like Figure 1b , Figure 2b , Figure 3b In some of the embodiments shown, the mounting structure includes at least two fixed arms 14. The fixed arm 14 itself is fixed to the shell 11, and the support column 13 is fixed on the fixed arm 14, and the edge of the fixed arm 14 facing the main light-emitting portion 122 is the first edge m. The fixed arm 14 is a strip-shaped structure, and its own rigidity is less than that of the shell 11, and it has a certain elasticity. Therefore, by fixing the support column 13 by the fixed arm 14, the connection rigidity between the support column 13 and the shell 11 can be reduced, thereby improving the seismic resistance of the filament 12. Other technical effects on reducing the length of the first part 1211, increasing the elasticity of the filament 12, and reducing the risk of brittle fracture can be referred to the above, and will not be repeated.

[0076] and Figure 1a Compared to the embodiment shown, Figure 1bIn the embodiment shown, the support column 13 is fixed by the fixed arm 14 extending into the chamber 111, thereby supporting the spatial structure of the filament 12. Therefore, the filament 12 can be supported so that it is located at a higher position in the chamber 111 (or interpreted as a position farther from the clamping portion 112) to meet different optical design requirements of the lamp bead 10. In addition, since the filament 12 is supported and fixed by the fixed arm 14, there is no filament 12 in the clamping portion 112, which can also avoid the compression of the filament 12 during the formation of the clamping portion 112, resulting in internal stress or local structural deformation of the filament 12.

[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 inside the clamping portion 112 and fixed to the clamping portion 112. The fixing method can refer to the molding process of the clamping portion 112 in the above text. The fixed arm 14 is embedded in the clamping portion 112 and fixed by cooling, shrinking, and external pressurization. Another 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 multiple embodiments shown, the filament 12 in the lamp bead 10 is a double helix structure, that is, at least a portion of the filament 12 is formed by two spiral windings.

[0080] In the same accommodation space, the actual length of the primary spiral filament is longer than that of the straight filament, and because the filament is spiral, the adjacent spiral turns are close to each other, and the heat gathering effect is more obvious, which makes it easy to keep the filament at a higher temperature, so it has a higher luminous power. Furthermore, in the same accommodation space, the secondary spiral filament is longer than the primary spiral filament and has a higher luminous power. But at the same time, compared with the straight filament, the strength of the primary spiral filament and the secondary spiral filament decreases successively, and the elasticity increases successively. In the illustrated embodiment, the connecting portion 121 corresponds to the primary spiral structure, has a higher strength, and mainly plays a supporting and connecting role; the main light-emitting portion 122 corresponds to the secondary spiral structure, has a higher luminous efficiency, and is mainly used for luminescence. The aforementioned connecting portion 121 and the main light-emitting portion 122 extend in different directions, which can be understood as the filament 12 as a whole extending into a bent shape, with the bent portion extending in a different direction, thereby distinguishing the connecting portion 121 from the main light-emitting portion 122; it can also be understood as the spiral structure of the filament 12 in space extending in different directions, and the portion where the primary spiral and the secondary spiral are connected can be regarded as the portion where the extension direction of the filament 12 changes, thereby distinguishing the connecting portion 121 from the main light-emitting portion 122.

[0081] Specifically, during the forming process of 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 portion 122 is located in the chamber 111 of the shell 11. The end of the connecting portion 121 is wound and fixed on the support column 13, and the wound and fixed part is located in the clamping portion 112. It should be noted that the connecting portion 121 and the main light-emitting portion 122 in this application are only for the convenience of clear description. The actual connecting portion 121 is a primary spiral wound once, and the main light-emitting portion 122 includes both a primary spiral and a secondary spiral.

[0082] The above comparison of filament shapes is based on the premise that the filament diameters are the same. However, in the art, generally, a straight filament or a single helical filament with a thicker diameter is used in a larger lamp bead. The strength of the filament itself is sufficient to support the spatial structure of the filament, and there is no need to use a support column for support. A double helical filament with a thinner diameter is used in a smaller lamp bead. The strength of the filament itself is insufficient to support the spatial structure of the filament, and the spatial structure of the filament needs to be supported by a support column. However, this also brings about a large difference in rigidity between the filament and the support column, and the connection point between the two is prone to breakage when subjected to impact force. The multiple embodiments of the present application are mainly aimed at improving the shortcomings of the above double helical filament.

[0083] like Figure 2aIn some of the embodiments shown, combined with the above, when the structure of the support column 13 is (b) or (c), the support column 13 supports the first part 1211 in the clamping part 112, on the one hand, the support column 13 and the filament 12 are fixed, and on the other hand, the support column 13 supports the first part 1211 during the forming process of the clamping part 112 to prevent its spiral structure from being crushed and deformed. In addition, since the first part 1211 does not participate in the light-emitting process and does not generate heat, when the structure of the support column 13 is (b) or (c), it can prevent the clamping part 112 from heating up and affecting the airtightness.

[0084] In some embodiments not shown, the portion of the filament 12 located in the chamber 111 is the main light-emitting portion 122, and the portion located in the clamping portion 112 is the connecting portion 121. It can also be understood that there is no connecting portion 121 in the chamber 111 of the shell 11, and the connecting portion 121 is completely located in the clamping portion 112 and only serves to connect and support. In this way, the length of the filament 12 in the chamber 111 can be maximized. Since the main light-emitting portion 122 has higher elasticity and higher luminous efficiency, the luminous efficiency and elasticity of the lamp bead 10 are maximized at the same time. It can also be understood that the connecting portion 121 of the filament 12 does not include the second portion 1212, but only includes the first portion 1211.

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

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

[0087] (2) The preset part of the core wire is removed, and the main light-emitting part 122 and the second part 1212 on the filament 12 corresponding to the part can participate in the actual light-emitting process. The part of the core wire that is not removed and remains is intertwined with the filament 12, and the part of the core wire that is intertwined with the filament 12 constitutes the aforementioned support column 13, and the part intertwined with the filament 12 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 as described above.

[0089] In this field, lamp beads can be roughly divided into transverse filaments and axial (longitudinal) filaments according to the direction of the filament. The transverse filament is the filament extending in a direction perpendicular to the axis of the lamp bead, and the axial (longitudinal) filament is the filament extending in a direction parallel to the axis of the lamp bead. In various embodiments of the present application, it mainly relates to a lamp bead 10 with a transverse filament 12. Specifically, the main light-emitting portion 122 extends in a direction roughly perpendicular to the connecting portion 121, and the distances between the two ends of the main light-emitting portion 122 and the clamping portion 112 are roughly the same, so the lengths and structures of the two connecting portions 121 are the same. It can also be understood that: from the overall extension direction of the filament 12, the transversely extending portion is the main light-emitting portion 122, and the longitudinally extending portion is the connecting portion 121. The longitudinal and transverse here refer to the axis relative to the lamp bead 10.

[0090] In combination with some of the aforementioned embodiments, the possibility of the entire filament 12 breaking is reduced due to the reduction in the length of the support column 13. In addition, since the two connecting parts 121 have the same length and structure and there is no obvious strength difference between the two, when the filament 12 is subjected to force and elastically deforms, the two connecting parts 121 can evenly distribute the mechanical stress to avoid breaking.

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

[0092] like Figure 4 , Figure 5 As shown, some embodiments of the present application also provide a radiation device 20, which can generate infrared radiation when powered on and directly heat the irradiated target object by thermal radiation. The radiation device 20 includes one or more lamp beads 10 as described above and one or more reflective cups 21. Among them, the reflective cup 21 can be installed on the lamp bead 10. When the lamp bead 10 emits light, the reflective 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 above content, the lamp bead 10 of the radiation device 20 has a stronger buffering ability against impact force, and the risk of breaking the filament 12 is relatively small. In particular, when the radiation device 20 falls or collides, the filament 12 can withstand a greater impact force without breaking, so that the radiation device 20 can cope with more complex use environments.

[0094] In some specific implementations, the inner surface of the reflective cup 21 is designed to be 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. Figure 4 As shown, the parabola of the reflective cup 21 has a preset focal plane f, which is a virtual surface, and the focus of the parabola of the reflective cup 21 is located on the focal plane f. When the light source is located at the focal plane f, the light is reflected by the parabola and forms an irradiation area of ​​a preset size and relatively uniform energy on the target object. The part of the lamp bead 10 that actually emits light is the filament 12, and the filament 12 is not a point structure, but a linear structure with a certain length in space. In combination with some of the aforementioned embodiments, the lamp bead 10 uses a transverse filament 12. When it is correctly installed on the reflective cup 21, most of the filaments 12 (at least including the aforementioned main light-emitting part 122) are located exactly on the focal plane n and extend along the focal plane n, and / or part of the filaments 12 (at least including the aforementioned main light-emitting part 122) are symmetrical relative to the focal plane n and are evenly distributed on both sides of the focal plane n. In this way, the light emitted by the lamp bead 10 can maximize the formation of a preset light field, so as to achieve uniform and efficient irradiation of the target object.

[0095] exist Figure 4 FIG. 2 shows a radiation device 20 having only one lamp bead 10 and one lamp cup 21 .

[0096] exist Figure 5 The figure shows a radiation device 20 having multiple lamp beads 10 and multiple lamp cups 21. The multiple lamp cups 21 can be arranged along a preset shape (e.g., a circular ring, a regular polygon, or an array), so that the radiation device 20 forms a preset light field and / or forms a light spot of a preset size 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 multiple lamp beads 10 simultaneously performing thermal radiation heating on an area is achieved, and the radiation device 20 has a higher heating efficiency.

[0097] like Figure 4 or Figure 5As shown, in some specific embodiments, the radiation device 20 further includes a substrate 22, and the reflective cup 21 and the lamp bead 10 are respectively installed with the substrate 22, and a gap is reserved between the reflective cup 21 and the lamp bead 10, and they are not directly installed. Since the lamp bead 10 is spatially located inside the area enclosed by the reflective cup 21, when the radiation device 20 is impacted, the impact force propagates along the path of the reflective cup 21-substrate 22-lamp bead 10, and is not directly transmitted from the reflective cup 21 to the lamp bead 10, thereby extending the force propagation path (compared to the direct installation of the lamp bead 10 and the reflective cup 21), which can reduce the impact force received by the lamp bead 10 and further improve the impact resistance of the lamp bead 10.

[0098] In some specific embodiments, the substrate 22 is a circuit board. The lamp bead 10 has an electrode 152 fixed to the clamping portion 112, and the electrode 152 and the substrate 22 are mounted on each other and form an electrical connection. The substrate 22 not only provides structural installation and fixation for the lamp bead 10, but also inputs current to the lamp bead 10 through the electrode 152.

[0099] In some embodiments, the radiation device 20 is a module that provides radiation function and needs to be integrated in 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 also has a complete housing, a power supply module, an operation button, etc. The power supply module may include a rechargeable battery or a power cord. When the user uses the radiation source 20, the user controls its opening and closing by operating the button, or further controls the radiation power, which can be used for heating, physical therapy, lighting and other scenes.

[0101] like Figure 6 As shown, some embodiments of the present application also provide a drying device 30, including a housing 31, a wind assembly 33, a power supply and the aforementioned lamp bead 10, and the power supply is electrically connected to the wind assembly 33 and the lamp bead 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 bead 10 emits 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, which is not necessarily accompanied by a "drying" process during use, 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 the reflective cup 21 matches the number of the lamp beads 10, and its function is not described in detail. 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 in a ring, and the reflective cup 21 is arranged in a ring accordingly, and 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 airflow, 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, and 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 at the same time to promote rapid evaporation of moisture.

[0104] As a handheld device, users may encounter problems such as bumps and falls when using the drying device 30. Referring to the aforementioned embodiments of the present application, since the structure of the lamp bead 10 is optimized and the length of the support column 13 is shortened, the filament 12 can better absorb and disperse the impact force when impacted by external force, thereby 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 sends a drop signal when the drying device 30 is detected to be in a drop state, and the control circuit cuts off the power supply to the lamp bead 10 after receiving the drop signal. The drop detection circuit can be implemented by an acceleration sensor. The drying device 30 held by hand or placed on a desktop is always affected by the acceleration of gravity. The detected acceleration of gravity is about g. When it is detected that its acceleration decreases rapidly from g and approaches zero, it can be considered that the drying device 30 is in a drop state. At this time, the drop detection circuit sends a drop signal, and the control circuit controls the lamp bead 10 to cut off the power supply to ensure that the lamp bead 10 is in a closed state when the drying device 30 falls to the ground. In other embodiments, it is also possible to determine whether the drying device 30 is in a high-speed motion state (for example, thrown out by humans or flying out of a high-speed vehicle) by detecting the acceleration of the drying device 30 in all directions. When it is in a high-speed motion state, the power supply of the lamp bead 10 is also cut off, thereby avoiding possible severe collision damage to the lamp bead 10.

[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 significantly decrease with the increase of temperature. 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 due to 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 and user experience of the drying device 30.

[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", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, orientations, positions, materials or characteristics described in conjunction with the embodiments or examples 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 contradictory.

[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 at least a portion of the filament is located in the chamber, the filament comprises a main light-emitting portion located in the middle and two connecting portions located at both ends, the connecting portions and the main light-emitting portion extend in different directions, and the connecting portions comprise a first portion wound and fixed on 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 is a part of the housing or is mounted on the housing, each of the support columns is mounted on the mounting structure, and an edge of the mounting structure facing the main light-emitting portion is 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 exceeds the first edge, and the length of the exceeding 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 part 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, and 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 from 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: The number of the supporting columns is two, and the filament is supported by the two supporting columns.

7. The lamp bead according to claim 1, characterized in that: The portion of the filament located in the chamber is entirely 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 boundary between 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, the molybdenum sheets are located in the clamping portion and are electrically connected to the corresponding support pillars; At least two electrodes, one end of each electrode is electrically connected to a 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 comprises 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 chamber and is fixed to the corresponding supporting column.

14. The lamp bead according to claim 1, characterized in that: One end of the support column extends beyond the first edge, and the 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 as described in 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 part of the filament extends along the focal plane, and / or at least part 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 shell, wherein an air duct is provided in the shell; A wind power assembly, located in the housing and used to generate airflow in the air duct; The lamp bead according to any one of claims 1 to 14; A power source 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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