A heating disc

Abstract

The application discloses a heating disc which comprises a supporting assembly and a heating assembly. The supporting assembly comprises a plurality of first supporting plates for supporting workpieces to be processed. The first supporting plates are arranged in parallel and spaced apart in a second direction. The first direction is perpendicular to the second direction. The heating assembly is arranged in the supporting assembly and is used for heating the workpieces to be processed. The heating assembly comprises heating wires for electrically connecting a power supply. The heating wires have a plurality of first heating sections and a plurality of second heating sections. The first heating sections are arranged through the first supporting plates in the second direction. The first heating sections are arranged in parallel and spaced apart in the first direction. The second heating sections are connected between one end of two adjacent first heating sections in the second direction. Alternatively, the heating wires are wound around the geometric center of the supporting assembly for several turns. By using the heating disc, the bottom of a circuit board can be preheated. In combination with the use of a hot air gun, the upper and lower sides of the circuit board can be preheated simultaneously to realize the overall temperature rise of the circuit board.

Description

Technical Field

[0001] This utility model relates to the field of circuit board repair technology, specifically to a heating plate. Background Technology

[0002] When repairing circuit boards, desoldering is necessary. Desoldering refers to heating the circuit board to melt the solder used to solder components, thereby separating the components or multi-layered board structures. Under current technology, a soldering iron tip and a hot air gun are typically used together for desoldering. The hot air gun heats the entire circuit board and activates the flux, while the soldering iron tip performs localized desoldering.

[0003] Soldering iron tips can heat specific areas of a circuit board at high temperatures. However, directly heating the board with a soldering iron tip can cause localized overheating of the substrate. Furthermore, due to differences in the thermal expansion coefficients of different material layers, this can lead to interlayer separation or blistering (board explosion). Some sensitive components, such as ceramic capacitors and BGA packages, are prone to developing microcracks under thermal shock with temperature differences exceeding 150°C / min. These cracks may be difficult to detect initially but will reduce long-term reliability. Localized overheating of the circuit board can also cause the copper foil on the solder pads to detach from the substrate (peel off), or the resin to carbonize and form conductive channels, leading to problems such as leakage or even short circuits and burnout.

[0004] If the bottom of the circuit board is not preheated, heating the circuit board with a hot air gun alone can easily cause the solder on the top of the components to melt while the bottom remains unmelted (especially for hidden solder joints of BGA / QFN). Forcibly disassembling the circuit board can easily tear the solder pads.

[0005] Meanwhile, current desoldering techniques suffer from problems such as excessively long operation times and increased hidden costs. Due to the limitations of using soldering iron tips and hot air guns together, desoldering circuit boards requires multiple attempts, consuming more desoldering wire and flux. Continuous operation of the soldering iron tip at high temperatures accelerates oxidation and shortens its lifespan. Utility Model Content

[0006] The main technical problem this utility model solves is to provide a heating plate that can heat the circuit board from the bottom so as to facilitate the disassembly of the circuit board.

[0007] According to a first aspect, one embodiment provides a heating plate, comprising: a support assembly for supporting a workpiece to be processed; the support assembly includes a plurality of first support plates supporting the workpiece to be processed; the first support plates have a preset length in a first direction, and the plurality of first support plates are arranged side-by-side at intervals in a second direction; the first direction is perpendicular to the second direction; a heating assembly disposed within the support assembly for heating the workpiece to be processed; the heating assembly includes a heating wire for electrically connecting to a power source, the heating wire having a plurality of first heating segments and a plurality of second heating segments; the first heating segments are disposed through the plurality of first support plates along the second direction, the plurality of first heating segments are arranged side-by-side at intervals in the first direction, and the second heating segments are connected between one end of two adjacent first heating segments in the second direction; or the heating wire is coiled several times around the geometric center of the support assembly and disposed in a ring-shaped layered form on the plurality of first support plates.

[0008] In some embodiments, the support assembly further includes a second support plate, the first support plate having a first end and a second end opposite to each other in a third direction, the first end of the first support plate being connected to the heating wire, the second end of the first support plate being connected to the second support plate, and the third direction being perpendicular to the first direction and the second direction.

[0009] In some embodiments, the support assembly further includes a connecting plate; in the third direction, the second support plate is located between the first support plate and the connecting plate; wherein, the second end of the first support plate is provided with a connecting portion penetrating the second support plate, and the connecting plate is disposed through the connecting portions of a plurality of first support plates along the second direction to restrict the plurality of first support plates onto the second support plate.

[0010] In some embodiments, the support assembly further includes a plurality of interconnected side plates that enclose a receiving space. Two of the side plates opposite each other in the first direction and / or two of the side plates opposite each other in the second direction are provided with first limiting slots. The edge of the second support plate is provided with a limiting protrusion. The limiting protrusion is inserted into the corresponding first limiting slot to restrict the first support plate and the second support plate within the receiving space.

[0011] In some embodiments, the heating plate further includes a storage component; the storage component includes a storage box, the support component is disposed inside the storage box, and the storage box is provided with a heat insulation structure for supporting the support component; wherein, the wall of the storage box is also provided with a second limiting slot, the second limiting slot allowing the limiting slot protrusion to be inserted to restrict the support component and the heat insulation structure inside the storage box.

[0012] In some embodiments, the heating plate further includes a switching assembly electrically connected between the heating wire and the power source, for turning the heating wire and the power source on or off.

[0013] In some embodiments, the switching assembly includes an adapter plate, a temperature switch, and a pressure plate; the adapter plate is fixedly disposed relative to the support assembly; the pressure plate is connected to the adapter plate to fix the temperature switch between the pressure plate and the adapter plate; the temperature switch is electrically connected between the heating wire and the power supply, and the temperature switch can disconnect the heating wire from the power supply after the temperature of the temperature switch or the temperature of the heating wire reaches a temperature threshold.

[0014] In some embodiments, the heating wire has a first connection point and a second connection point opposite each other along its length direction, and the heating wire also has a third connection point located between the first connection point and the second connection point along the length direction of the heating wire. The heating plate has a first use state and a second use state; wherein: in the first use state, the power supply is electrically connected between the first connection point and the second connection point; in the second use state, the first connection point and the second connection point are electrically connected, and the power supply is electrically connected between the third connection point and the first connection point.

[0015] In some embodiments, the heating wire comprises an iron-chromium wire, and the first support plate is a mica sheet.

[0016] In some embodiments, the first support plate includes a main body and a plurality of protrusions connected to the same side of the main body in a third direction; a wire-holding groove is formed between the protrusions and the main body; the wire-holding groove is used to allow the heating wire to pass through the first support plate to confine the heating wire to the first support plate.

[0017] According to the above embodiment, a heating plate can preheat the bottom of the circuit board. Combined with the use of a hot air gun, it can preheat both the top and bottom sides of the circuit board at the same time to achieve overall heating of the circuit board. This allows the solder on the top and bottom sides of the circuit board to melt synchronously, avoiding excessive temperature differences caused by local thermal shock when desoldering with a soldering iron tip. It also avoids interlayer separation or blistering due to differences in the thermal expansion coefficients of different material layers, and can also protect sensitive components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the heating plate structure according to some embodiments of this specification;

[0019] Figure 2 This is an exploded view of the heating plate according to some embodiments shown in this specification;

[0020] Figure 3 This is a schematic diagram of the structure of the heating component according to some embodiments of this specification;

[0021] Figure 4 This is an exploded view of the support assembly shown in some embodiments of this specification;

[0022] Figure 5 This is a schematic diagram of the structure of the first support plate according to some embodiments of this specification;

[0023] Figure 6 This is an exploded view of a switching assembly shown according to some embodiments of this specification.

[0024] In the picture:

[0025] 100-Support assembly, 110-First support plate, 111-Main body, 112-Protrusion, 113-Wire slot, 114-Connecting part, 115-Second elongated hole, 120-Second support plate, 121-First elongated hole, 122-Limiting protrusion, 130-Side plate, 131-First limiting slot, 140-Connecting plate, 200-Heating assembly, 210-Heating wire, 211-First heating segment, 212-Second heating segment, 221-First wiring point, 222-Second wiring point, 223-Third wiring point, 300-Storage assembly, 310-Storage box, 320-Second limiting slot, 330-Support column, 400-Switch assembly, 410-Adapter plate, 420-Temperature switch, 430-Pressure plate, 440-Connecting column. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0027] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0028] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0029] Figure 1 This is a schematic diagram of the heating plate according to some embodiments of this specification. Figure 2 This is an exploded schematic diagram of the heating plate according to some embodiments of this specification. Figure 3 This is a schematic diagram of the structure of a heating component according to some embodiments of this specification. Figure 4 This is an exploded view of the support components shown in some embodiments of this specification. Figure 5 This is a structural schematic diagram of the first support plate shown in some embodiments of this specification.

[0030] like Figure 1 , Figure 2 , Figure 4 As shown, a heating plate includes a support assembly 100 and a heating assembly 200.

[0031] The support assembly 100 is used to support the workpiece to be processed (not shown in the figure). The workpiece to be processed may include circuit boards, etc.

[0032] In some embodiments, the support assembly 100 includes a plurality of first support plates 110 that support the workpiece to be processed.

[0033] The first support plate 110 may be an elongated plate-like structure. In some embodiments, the first support plate 100 is in a first direction (e.g., Figure 4 In the X direction, a plurality of first support plates 100 have a predetermined length, and in the second direction (e.g., Figure 4 The first support plates 100 are arranged side-by-side at intervals in the Y direction (in the middle); the first direction is perpendicular to the second direction. The preset length and the spacing between two adjacent first support plates 100 are preset values, which can be set according to actual needs.

[0034] In some embodiments, the plurality of first support plates 100 are in a third direction (e.g., Figure 4 The upper surface in the Z direction can form a support surface to support the workpiece to be processed.

[0035] In some embodiments, the plurality of first support plates 100 may also have other distribution patterns, such as at least one of spiral distribution, radial distribution, grid distribution, etc.

[0036] In some embodiments, the plurality of first support plates 100 may be a split structure or a one-piece structure.

[0037] In some embodiments, the first support plate 100 may be made of an insulating and high-temperature resistant material, such as mica, ceramic, polytetrafluoroethylene, etc. By way of example only, the first support plate 100 may include a mica sheet.

[0038] A heating element 200 is disposed within a support assembly 100 and is used to heat the workpiece to be processed. In some embodiments, the heating element 200 includes a heating wire 210 for electrical connection to a power source. The heating wire 210 can generate heat when energized, thereby heating the workpiece to be processed.

[0039] In some embodiments, such as Figure 3 As shown, the heating wire 210 has multiple first heating segments 211 and multiple second heating segments 212.

[0040] In some embodiments, such as Figure 3 As shown, a first heating segment 211 is provided with multiple first support plates 110 passing through it along a second direction. The multiple first heating segments 211 are arranged side-by-side with intervals along a first direction. Second heating segments 212 are connected between the ends of two adjacent first heating segments 211 along a second direction. That is, the heating wire 210 can be distributed in an S-shape. This helps to reduce the contact area between the heating wire 210 and the first support plate 110, facilitating the outward radiation of heat generated by the heating wire 210 and reducing the heat transferred to the first support plate 110.

[0041] In some embodiments, the heating wire 210 is arranged in a ring-shaped, layered configuration on a plurality of first support plates 110, with several turns centered on the geometric center of the support assembly 100. That is, the heating wire 210 can be distributed in a spiral shape.

[0042] In some embodiments, the heating wire 210 may have other distribution patterns, such as a ring distribution, a radial distribution, etc., and its specific distribution pattern can also be set according to actual needs.

[0043] In some embodiments, the heating wire 210 can be a flexible metal wire, which can be bent or folded as needed. In some embodiments, the heating wire 210 can be made of a variety of materials, such as at least one of nickel-chromium alloy, iron-chromium alloy, and iron-chromium-aluminum alloy. By way of example only, the heating wire 210 may include iron-chromium wire.

[0044] In some embodiments, the cross-section of the heating wire 210 may include various shapes, such as flat, circular, polygonal, etc., and its specific shape may be set according to actual needs.

[0045] In some embodiments, the heating wire 210 can be snapped into the first support plate 110.

[0046] In some embodiments, such as Figure 5 As shown, the first support plate 110 includes a main body 111 and a plurality of components connected to the main body 111 in a third direction (e.g., Figure 5 A protrusion 112 on the same side in the Z direction; a wire-locking groove 113 is formed between the protrusion 112 and the main body 111; the wire-locking groove 113 is used to allow the heating wire 210 to pass through the first support plate 110, so as to restrict the heating wire 210 on the first support plate 110.

[0047] The protrusion 112 protrudes in a third direction relative to the side of the main body 111. In some embodiments, adjacent protrusions 112 may be spaced apart or in contact. By spaced apart adjacent protrusions 112, the heating wire 210 can be more easily inserted into the wire slot 113 when it is installed. In some embodiments, the protrusion 112 and the main body 111 may be integrally formed.

[0048] In some embodiments, the wire retaining groove 113 may include various shapes, such as at least one of a straight line, an L-shape, or an arc shape. Designing the wire retaining groove 113 as L-shaped or arc-shaped allows the heating wire 210 to be staggered from the opening of the groove 113 after it is inserted, thereby helping to prevent the heating wire 210 from detaching from the groove 113. In some embodiments, after the heating wire 210 is inserted into the groove 113, it can be in a taut state, avoiding the risk of the heating wire 210 loosening and detaching from the groove 113.

[0049] In some embodiments, the corresponding wire-holding grooves 113 on the plurality of first support plates 110 can be arranged in a straight line along the second direction. This facilitates the simultaneous insertion of the heating wire 210 into the corresponding wire-holding grooves 113 on the plurality of first support plates 110 during the installation of the heating wire 210.

[0050] In some embodiments, at least one protrusion 112 is spaced between two adjacent first heating sections 211, which helps to make the bending point of the heating wire 210 transition smoothly, avoids excessive bending of the heating wire 210, and avoids stress concentration at the bending point, which helps to extend the service life of the heating wire 210.

[0051] When it is necessary to heat the workpiece to be processed, the workpiece to be processed is placed on the support surface formed by multiple first support plates 100, and the heating wire 210 is connected to the power supply so that the heating wire 210 is energized and heated. The bottom of the workpiece to be processed is heated by the heating wire 210, and the top of the workpiece to be processed can also be heated by a hot air gun, so that the top and bottom of the workpiece to be processed can be heated evenly.

[0052] In some embodiments, in the third-party direction, a certain distance is formed between the heating wire 210 and the workpiece to be processed, so as to avoid direct contact between the heating wire 210 and the workpiece to be processed, thereby reducing the risk of damage to the workpiece due to direct contact with the heating wire 210. At the same time, it can also avoid accidental contact by personnel and improve safety.

[0053] In some embodiments, such as Figure 4 As shown, the support assembly 100 also includes a second support plate 120, and the first support plate 110 is in a third direction (e.g., Figure 4 The first support plate 110 has a first end and a second end in the Z direction, the first end of the first support plate 110 is connected to the heating wire 210, the second end of the first support plate 110 is connected to the second support plate 120, and the third direction is perpendicular to the first direction and the second direction.

[0054] The second support plate 120 serves as an installation base for supporting multiple first support plates 110. In some embodiments, the second support plate 120 and the first support plate 110 can be connected in various ways, such as at least one of snap-fit, adhesive bonding, or integral molding.

[0055] In some embodiments, a plurality of protrusions 112 are provided at the first end of the first support plate 110.

[0056] In some embodiments, the second support plate 120 and the first support plate 110 may be made of the same material.

[0057] In some embodiments, the length of the second support plate 120 in the first direction may be greater than or equal to the length of the first support plate 110 in the first direction.

[0058] By using the second support plate 120 to support the multiple first support plates 110, the stability and relative position accuracy of the multiple first support plates 110 can be improved, which is beneficial to ensuring the stability of the workpiece to be processed on the first support plate 110.

[0059] In some embodiments, the support component 100 further includes a connecting plate 140.

[0060] The connecting plate 140 is used to connect multiple first support plates 110.

[0061] In some embodiments, such as Figure 4 , Figure 5 As shown, in the third direction, the second support plate 120 is located between the first support plate 110 and the connecting plate 140; wherein, the second end of the first support plate 110 is provided with a connecting portion 114 that penetrates the second support plate 120, and the connecting plate 140 is provided to penetrate the connecting portions 114 of the multiple first support plates 110 along the second direction, so as to restrict the multiple first support plates 110 onto the second support plate 120.

[0062] The connecting portion 114 protrudes from the body portion 111 of the first support plate 110, forming a step with the body portion 111. When the connecting portion 114 passes through the second support plate 120, the body portion 111 can be engaged with the second support plate 120, with the connecting portion 114 and the body portion 111 located on opposite sides of the second support plate 120. This further improves the stability and positional accuracy of the first support plate 110.

[0063] In some embodiments, the second support plate 120 is provided with a plurality of first elongated holes 121, the first elongated holes 121 being adapted to the connecting portion 114, and the connecting portion 114 being able to pass through the first elongated holes 121, thereby realizing the snap-fit ​​between the second support plate 120 and the first support plate 110. In some embodiments, the connecting portion 114 and the first elongated holes 121 can be clearance-fitted or transition-fitted.

[0064] In some embodiments, a padding layer may be provided between the connecting portion 114 and the second support plate 120. The padding layer can be used to secure the connecting portion 114 and prevent it from loosening. The padding layer may be made of a high-temperature resistant material, such as polytetrafluoroethylene (PTFE).

[0065] In some embodiments, at least two connecting portions 114 may be provided on the first support plate 110, and a plurality of first elongated holes 121 on the second support plate 120 correspond to the plurality of connecting portions 114 on the first support plate 110. This enables the first support plate 110 to be connected to the second support plate 120 at multiple positions in a first direction, thereby further improving the stability of the first support plate 110.

[0066] In some embodiments, such as Figure 5 As shown, the connecting part 114 is provided with a second elongated hole 115, which is adapted to the connecting plate 140. The connecting plate 140 can pass through the second elongated holes 115 on multiple first support plates 110 at the same time, thereby connecting multiple first support plates 110 by connecting the connecting plate 140. This can restrict the rotational freedom of the first support plates 110, thereby restricting multiple first support plates 110 to the second support plate 120, so as to further improve the stability and positional accuracy of multiple first support plates 110.

[0067] In some embodiments, the connecting plate 140 and the second elongated hole 115 may be clearance-fitted or transition-fitted. In some embodiments, a padding layer may be provided between the connecting plate 140 and the connecting portion 114, which can be used to clamp the connecting plate 140 and prevent the connecting plate 140 from loosening.

[0068] In some embodiments, the connecting plate 140 and the first support plate 110 may be made of the same material.

[0069] In some embodiments, at least two connecting portions 114 may be provided on the first support plate 110, and each connecting portion 114 may be provided with at least two second elongated holes 115. Multiple connecting plates 140 may be provided, and each connecting plate 140 passes through the multiple corresponding second elongated holes 115 on the multiple first support plates 110, thereby further improving the connection strength between the connecting plate 140 and the first support plate 110, which is conducive to improving the stability of the first support plate 110 and preventing the multiple first support plates 110 from becoming loose and affecting the support effect on the workpiece to be processed.

[0070] In some embodiments, such as Figure 4 As shown, the support assembly 100 also includes a plurality of interconnected side plates 130, which enclose a receiving space.

[0071] Multiple side panels 130 are used to shield the second support plate 120 circumferentially. In some embodiments, the multiple side panels 130 can be interconnected in various ways, such as at least one of snap-fit, adhesive, or integral molding.

[0072] The accommodating space is used to accommodate the second support plate 120 and the first support plate 110. In some embodiments, the shape of the accommodating space is adapted to the circumferential contour of the second support plate 120. By way of example only, the second support plate 120 is a quadrilateral planar structure, and four side plates 130 may be provided. The four side plates 130 enclose a quadrangular prism-shaped accommodating space for accommodating the second support plate 120 and the first support plate 110.

[0073] In some embodiments, the side plate 130 may be made of the same material as the first support plate 110.

[0074] In some embodiments, the first support plate 110 can divide the accommodating space into multiple elongated spaces arranged along a first direction. Within each elongated space, portions of multiple first heating segments 211 can be distributed at intervals along the first direction, thereby uniformly providing heat energy to heat the workpiece to be processed. Since the side plate 130, the first support plate 110, and the second support plate 120 are made of heat-insulating material, the elongated spaces can also be used to store heat energy to achieve a heat preservation effect, thereby ensuring the heating effect on the workpiece to be processed.

[0075] In some embodiments, the side plate 130 and the second support plate 120 can be connected in a variety of ways, such as at least one of snap-fitting, bonding, etc.

[0076] In some embodiments, two side plates 130 opposite each other in the first direction and / or two side plates 130 opposite each other in the second direction are provided with first limiting slots 131, and the edge of the second support plate 120 is provided with limiting protrusions 122; the limiting protrusions 122 are inserted into the corresponding first limiting slots 131 to restrict the first support plate 110 and the second support plate 120 within the accommodating space.

[0077] In some embodiments, multiple limiting protrusions 122 can be provided along the edge of the second support plate 120, and multiple first limiting slots 131 can be provided corresponding to the limiting protrusions 122, thereby improving the connection strength between the second support plate 120 and the side plate 130.

[0078] In some embodiments, the first limiting slot 131 and the limiting protrusion 122 can cooperate in various ways, such as transition fit, interference fit, etc., to improve the connection strength between the first limiting slot 131 and the limiting protrusion 122 and prevent the second support plate 120 from becoming loose from the side plate 130.

[0079] The heating plate provided in some embodiments of this specification can uniformly heat the bottom of a workpiece (e.g., a circuit board) placed on the first support 110, so that different positions on the bottom of the workpiece are heated simultaneously and at the same heating rate. In conjunction with the hot air gun on the top of the circuit board, the workpiece is heated, and the top and bottom sides of the circuit board are preheated to achieve overall heating of the circuit board, allowing the solder on the top and bottom sides of the circuit board to melt synchronously. This avoids excessive temperature differences caused by localized thermal shock when using a soldering iron tip for desoldering, preventing interlayer separation or blistering due to differences in the thermal expansion coefficients of different material layers. Simultaneously, it can also preheat sensitive components, reducing the temperature difference caused by thermal shock to sensitive components, thereby protecting them.

[0080] In some embodiments, such as Figure 1 , Figure 2 As shown, the heating plate also includes a storage component 300;

[0081] The storage component includes a storage box 310, and a support component 100 is disposed inside the storage box 310.

[0082] The storage box 310 has an internal space for mounting the support assembly 100, providing support and protection for the support assembly 100. In some embodiments, the inner surface of the storage box 310 may be adapted to the outer surface of the support assembly 100. In some embodiments, a gap may be formed between the inner surface of the storage box 310 and the outer surface of the support assembly 100 to prevent contact between the storage box 310 and the support assembly 100, thereby reducing heat transfer from the support assembly 100 to the storage box 310. The size of this gap can be set according to actual needs.

[0083] In some embodiments, the storage box 310 can be made of various materials, such as metal, ceramic, mica, high-temperature resistant plastic, etc. In some embodiments, the storage box 310 can be a one-piece molded structure or a split structure.

[0084] In some embodiments, the storage box 310 is provided with a heat insulation structure for supporting the support assembly 100.

[0085] The thermal insulation structure 500 is used to insulate the heat generated by the heating element 200 along a third direction (e.g., Figure 2 The heat is transferred downwards (in the Z direction) to the storage box 310, preventing the storage box 310 from overheating. In some embodiments, in the third direction, the insulation structure 500 may cover the support component 100. In some embodiments, the insulation structure 500 may be made of an elastic material, utilizing the elastic deformation of the elastic material to eliminate the gap between the insulation structure 500 and the support component 100, thereby enhancing the insulation effect. The elastic material may include insulation cotton, rubber and plastic insulation materials, etc.

[0086] In some embodiments, the storage box 310 is further provided with a second limiting slot 320 on its wall. The second limiting slot 320 allows the limiting protrusion 122 to be inserted to confine the support assembly 100 and the heat insulation structure 500 within the storage box 310. For more information about the limiting protrusion 122, please refer to the previous section on... Figure 4 Related descriptions.

[0087] In some embodiments, the second limiting slot 320 is correspondingly provided with the limiting protrusion 122. The corresponding second limiting slot 320 and the limiting protrusion 122 can be engaged to improve the connection strength between the second limiting slot 320 and the limiting protrusion 122 and the stability of the support component 100.

[0088] In some embodiments, such as Figure 1 , Figure 2 As shown, the heating plate also includes a switch assembly 400, which is electrically connected between the heating wire 210 and the power supply, and is used to turn the heating wire 210 and the power supply on or off. In some embodiments, the switch assembly 400 can be manually controlled or remotely automatically controlled.

[0089] Figure 6 This is an exploded view of a switching assembly shown according to some embodiments of this specification.

[0090] In some embodiments, the switch assembly 400 includes an adapter plate 410, a temperature switch 420, and a pressure plate 430.

[0091] The adapter plate 410 serves as a mounting base for mounting the temperature switch 420. In some embodiments, the adapter plate 410 is fixed relative to the support assembly. In some embodiments, the adapter plate 410 can be connected to the storage box 310.

[0092] In some embodiments, the adapter plate 410 is provided with at least one connecting post 440, and the adapter plate 410 is connected to the storage box 310 through the connecting post 440. The connecting post 440 can create a certain gap between the adapter plate 410 and the storage box 310, thereby reducing the heat transferred from the storage box 310 to the adapter plate 410 and the temperature switch 420. The connecting post 440 can be connected to the adapter plate 410 and / or the storage box 310 in a variety of ways, such as at least one of adhesive bonding, snap-fitting, welding, and threaded connection.

[0093] Temperature switch 420 is used to connect or disconnect the heating wire 210 from the power supply. Temperature switch 420 can be electrically connected between the heating wire 210 and the power supply. For example, temperature switch 420 can be connected to the heating wire 210 and the power supply respectively via conductive wires to form a circuit. Temperature switch 420 controls the connection or disconnection of the heating wire 210 from the power supply through its own open / closed state. In some embodiments, temperature switch 420 can disconnect the heating wire 210 from the power supply after the temperature of temperature switch 420 or the temperature of heating wire 210 reaches a temperature threshold, thereby providing high-temperature power-off protection. In some embodiments, the temperature threshold is a preset value and can be set according to actual needs.

[0094] The pressure plate 430 is connected to the adapter plate 410 to fix the temperature switch 420 between the pressure plate 430 and the adapter plate 410. In some embodiments, the side of the pressure plate 430 facing the adapter plate 410 has a mounting groove, and the temperature switch 420 can be disposed in the mounting groove. In some embodiments, the pressure plate 430 and the adapter plate 410 can be connected in a variety of ways, such as at least one of adhesive bonding, snap-fitting, threaded connection, etc.

[0095] In some embodiments, such as Figure 2As shown, multiple support columns 330 can be provided at the bottom of the storage box 310. These support columns 330 provide support for the storage box 310 and create a certain space below it. The switch assembly 400 can be connected to the lower surface of the storage box 310 and is located below it. When heating the workpiece, this prevents the switch assembly 400 from directly contacting the hot air from the hot air gun and also prevents the heat generated by the heating wire 210 from being transferred to the switch assembly 400. This protects the switch assembly 400 and prevents accidental activation of the temperature switch 420, which could affect the heating of the workpiece.

[0096] In some embodiments, such as Figure 3 As shown, the heating wire 210 has a first connection point 221 and a second connection point 222 opposite to each other along its length direction. The heating wire 210 also has a third connection point 223, which is located between the first connection point 221 and the second connection point 222 along the length direction of the heating wire 210.

[0097] The first connection point 221, the second connection point 222, and the third connection point 223 refer to the preset points where the heating wire 210 is electrically connected to the switch assembly 400 or the power supply. The first connection point 221, the second connection point 222, and the third connection point 223 can be electrically connected to the switch assembly 400 or the power supply through conductive wires.

[0098] In some embodiments, the heating plate has a first usage state and a second usage state.

[0099] In the first operating state, the power supply is electrically connected between the first terminal 221 and the second terminal 222, and the power supply can be a 230V power supply.

[0100] In the second operating state, the first terminal 221 and the second terminal 222 are electrically connected, and the power supply is electrically connected between the third terminal 223 and the first terminal 221. In this state, the power supply can be 120V. The portion of the heating wire 210 between the first terminal 221 and the third terminal 223 can be connected in parallel with the portion of the heating wire 210 between the second terminal 222 and the third terminal 223. This allows the heating plate to be used under different voltage conditions as needed, thus improving its applicability.

[0101] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A heating plate, characterized in that, include: Support components are used to support the workpiece to be processed; The support assembly includes a plurality of first support plates that support the workpiece to be processed; The first support plate has a preset length in a first direction, and multiple first support plates are arranged side by side at intervals in a second direction; the first direction is perpendicular to the second direction. A heating element, disposed within the support assembly, is used to heat the workpiece to be processed; the heating element includes a heating wire for electrical connection to a power source, the heating wire having multiple first heating segments and multiple second heating segments; The first heating segment is provided with multiple first support plates passing through it along the second direction. The multiple first heating segments are arranged side-by-side at intervals along the first direction. The second heating segment is connected between one end of two adjacent first heating segments along the second direction; or The heating wire is coiled several times around the geometric center of the support component and arranged in a ring-shaped, layered form on multiple first support plates.

2. The heating plate as described in claim 1, characterized in that, The support assembly further includes a second support plate. The first support plate has a first end and a second end opposite to each other in a third direction. The first end of the first support plate is connected to the heating wire, and the second end of the first support plate is connected to the second support plate. The third direction is perpendicular to the first direction and the second direction.

3. The heating plate as described in claim 2, characterized in that, The support assembly also includes a connecting plate; In the third direction, the second support plate is located between the first support plate and the connecting plate; wherein, the second end of the first support plate is provided with a connecting portion that penetrates the second support plate, and the connecting plate is provided to penetrate the connecting portions of multiple first support plates along the second direction, so as to restrict multiple first support plates to the second support plate.

4. The heating plate as described in claim 2, characterized in that, The support assembly also includes a plurality of interconnected side plates, which enclose a receiving space. Two of the side plates opposite each other in the first direction and / or two of the side plates opposite each other in the second direction are provided with first limiting slots. The edge of the second support plate is provided with a limiting protrusion. The limiting protrusion is inserted into the corresponding first limiting slot to restrict the first support plate and the second support plate within the receiving space.

5. The heating plate as described in claim 4, characterized in that, The heating plate also includes a storage component; The storage component includes a storage box, and the support component is disposed inside the storage box. The storage box is provided with a heat insulation structure for supporting the support component. The storage box wall is also provided with a second limiting slot, which allows the limiting slot to be inserted to confine the support component and the heat insulation structure inside the storage box.

6. The heating plate as described in claim 1, characterized in that, The heating plate also includes a switch assembly, which is electrically connected between the heating wire and the power source, and is used to connect or disconnect the heating wire and the power source.

7. The heating plate as described in claim 6, characterized in that, The switching assembly includes an adapter plate, a temperature switch, and a pressure plate; the adapter plate is fixedly disposed relative to the support assembly; the pressure plate is connected to the adapter plate to fix the temperature switch between the pressure plate and the adapter plate; the temperature switch is electrically connected between the heating wire and the power supply, and the temperature switch can disconnect the heating wire from the power supply after the temperature of the temperature switch or the temperature of the heating wire reaches a temperature threshold.

8. The heating plate as described in any one of claims 1-7, characterized in that, The heating wire has a first connection point and a second connection point opposite each other along its length direction. The heating wire also has a third connection point located between the first connection point and the second connection point along the length direction of the heating wire. The heating plate has a first usage state and a second usage state; wherein: In the first usage state, the power supply is electrically connected between the first terminal and the second terminal; in the second usage state, the first terminal and the second terminal are electrically connected, and the power supply is electrically connected between the third terminal and the first terminal.

9. The heating plate as described in any one of claims 1-7, characterized in that, The heating wire includes iron-chromium wire, and the first support plate is a mica sheet.

10. The heating plate according to any one of claims 1-7, characterized in that, The first support plate includes a main body and a plurality of protrusions connected to the same side of the main body in a third direction; a wire-holding groove is formed between the protrusions and the main body; the wire-holding groove is used to allow the heating wire to pass through the first support plate, so as to restrict the heating wire on the first support plate.

Images