A junction box and a carbon fiber heater

Abstract

The present invention discloses a junction box and a carbon fiber heater. The junction box includes a bottom case; two lower contact pieces, which are arranged on the bottom case at intervals, and the lower contact pieces are provided with power connection terminals extending out of the bottom case; two upper contact pieces, corresponding to the two lower contact pieces one by one, and the upper contact pieces are movably arranged above the corresponding lower contact pieces; a face cover, detachably connected to the bottom case, and the face cover and the bottom case form a box body, and two ports for the ends of the carbon fiber heating elements to extend into are arranged on the box body; the inner wall of the face cover can be abutted against the upper contact pieces to clamp the ends of the carbon fiber heating elements between the lower contact pieces and the corresponding upper contact pieces. The installation method of this junction box is convenient and reliable, and can ensure the stability of the electrical connection of the carbon fiber heating element. This carbon fiber heater includes a carbon fiber heating element and the above-mentioned junction box. The access method of the carbon fiber heating element is convenient and reliable, and it is not easy to damage the ends of the carbon fiber heating element, and can ensure the stability of the electrical connection of the carbon fiber heating element.

Description

Technical Field

[0001] The present invention relates to a junction box and a carbon fiber heater. Background Art

[0002] At present, general wiring structures are all based on metal wires. Since metal wires have good extensibility, they are generally connected by means of tight fitting or welding. However, with the progress of technology, more and more materials have begun to be applied, such as carbon fiber. Carbon fiber is a new type of fiber material with high strength and high modulus and a carbon content of more than 95%. It is formed by stacking organic fibers such as flaky graphite crystals along the fiber axis and is a microcrystalline graphite material obtained through carbonization and graphitization treatment. When carbon fiber is used as a heating element, the two ends of the carbon fiber are in a strip shape, and the ends of the carbon fiber need to be connected to a circuit board or an external power supply line. However, the carbon fiber cannot be welded and fixed on the circuit board, nor can it be easily connected to the external power supply line, resulting in difficulties in the electrical connection of the carbon fiber. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a junction box with a simple connection method and firm connection.

[0004] The present invention also provides a carbon fiber heater, which includes the above-mentioned junction box, and ensures the stability of the electrical connection of the carbon fiber heating element through a clamping and fixing method.

[0005] According to a junction box of the present invention, it includes: a bottom case; two lower contact pieces, which are arranged on the bottom case at intervals, and power connection terminals extending out of the bottom case are provided on the lower contact pieces; two upper contact pieces, corresponding to the two lower contact pieces one by one, and the upper contact pieces are movably arranged above the corresponding lower contact pieces; a face cover, which is detachably connected to the bottom case, and the face cover and the bottom case form a box body, and two ports through which the ends of the carbon fiber heating element can extend are provided on the box body; the inner wall of the face cover can abut against the upper contact piece to clamp the end of the carbon fiber heating element between the lower contact piece and the corresponding upper contact piece.

[0006] The junction box according to the first aspect embodiment of the present invention has at least the following beneficial effects:

[0007] Before connecting the carbon fiber heating element to the above-mentioned junction box, first completely or partially separate the face cover from the bottom case so that there is a movable gap between the upper contact piece and the lower contact piece. Then insert the end of the carbon fiber heating element into this movable gap along the port. Then install and fix the face cover on the bottom case so that the upper contact piece moves closer to the lower contact piece and clamps the end of the carbon fiber heating element. The power connection terminal on the lower contact piece can be welded or connected to an external power supply end, thereby realizing the electrical connection of the carbon fiber heating element. The installation method of this junction box is convenient and reliable, and can ensure the stability of the electrical connection of the carbon fiber heating element.

[0008] In some embodiments of the present invention, the face cover and the bottom case are connected by a bolt assembly.

[0009] In some embodiments of the present invention, the bolt assembly includes a fastening bolt and a nut screwed to the fastening bolt. The face cover and the bottom case are respectively provided with a first through hole and a second through hole that match the fastening bolt.

[0010] In some embodiments of the present invention, the upper contact piece is provided with a through hole, and the fastening bolt sequentially passes through the first through hole, the through hole and the second through hole movably.

[0011] In some embodiments of the present invention, an elastic member capable of driving the upper contact piece away from the lower contact piece is provided between the bottom case and the upper contact piece, and the port faces the side portions of the upper contact piece and the lower contact piece.

[0012] In some embodiments of the present invention, the elastic member is a spring, and the bottom case is provided with a positioning post inserted into the lower end of the spring.

[0013] In some embodiments of the present invention, the bottom case is provided with an insulating partition for isolating two lower contact pieces.

[0014] A carbon fiber heater according to an embodiment of the second aspect of the present invention includes: a carbon fiber heating element and the junction box of any of the above technical solutions. The two ends of the carbon fiber heating element are respectively connected with a first carbon fiber terminal and a second carbon fiber terminal. The first carbon fiber terminal is clamped between one of the upper contact pieces and the corresponding lower contact piece, and the second carbon fiber terminal is arranged between the other upper contact piece and the corresponding lower contact piece.

[0015] The carbon fiber heater according to the embodiment of the second aspect of the present invention has at least the following beneficial effects:

[0016] The access method of the carbon fiber heating element of the carbon fiber heater with the above structure is convenient and reliable, is not easy to damage the end of the carbon fiber heating element, and can ensure the stability of the electrical connection of the carbon fiber heating element.

[0017] In some embodiments of the present invention, the carbon fiber heater further includes a housing, the housing has a cavity with an upward opening, a circuit board assembly, a heat insulation board assembly and a microcrystalline board are distributed in the cavity from bottom to top, the microcrystalline board is used to close the opening of the cavity, the carbon fiber heating element is located on the heat insulation board assembly and abuts against the microcrystalline board, and the power connection terminal is welded and fixed on the circuit board assembly.

[0018] In some embodiments of the present invention, the heat insulation board assembly includes a mounting cover connected to the housing and a heat insulation board accommodated in the mounting cover, and a positioning sink matching the contour shape of the carbon fiber heating element is provided on the upper surface of the heat insulation board.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a schematic structural diagram of an embodiment of the junction box of the present invention;

[0022] Figure 2 is Figure 1 a schematic exploded view of the structure of the embodiment;

[0023] Figure 3 is a schematic structural diagram of an embodiment of the carbon fiber heater of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0025] In the description of the present invention, it should be understood that for the orientation description, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 thus should not be construed as a limitation of the present invention.

[0026] In the description of the present invention, "a number of" means one or more, "a plurality of" means more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0027] In the description of the present invention, 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] See Figures 1 to 3 , the present invention discloses a junction box, including: a bottom case 110; two lower contact pieces 200, which are arranged at intervals on the bottom case 110, and the lower contact pieces 200 are provided with power connection terminals 210 extending out of the bottom case 110; two upper contact pieces 300, corresponding to the two lower contact pieces 200 one by one, and the upper contact pieces 300 are movably arranged above the corresponding lower contact pieces 200; a face cover 120, detachably connected to the bottom case 110, and the face cover 120 and the bottom case 110 form a box body 100, and two ports 111 for the ends of the carbon fiber heating element 600 to extend into are arranged on the box body 100; the inner wall of the face cover 120 can be abutted against the upper contact piece 300 to clamp the end of the carbon fiber heating element 600 between the lower contact piece 200 and the corresponding upper contact piece 300.

[0029] Before connecting the carbon fiber heating element 600 to the above-mentioned junction box, first completely separate or partially separate the face cover 120 from the bottom case 110 so that there is a movable gap between the upper contact piece 300 and the lower contact piece 200, then extend the end of the carbon fiber heating element 600 into the movable gap along the port 111, and then install and fix the face cover 120 on the bottom case 110 so that the upper contact piece 300 moves closer to the lower contact piece 200 and clamps the end of the carbon fiber heating element 600. The power connection terminal 210 on the lower contact piece 200 can be welded or connected to an external power supply terminal. The power connection terminal 210 is made of conductive metal, so as to realize the electrical connection of the carbon fiber heating element 600. The installation method of this junction box is convenient and reliable, and can ensure the stability of the electrical connection of the carbon fiber heating element 600.

[0030] See Figure 1 and Figure 2In some embodiments of the present invention, the cover 120 is connected to the bottom shell 110 by a bolt assembly 400. The method of realizing the detachable connection between the cover 120 and the bottom shell 110 by the bolt assembly 400 is very simple, and after loosening the bolt assembly 400, the cover 120 can float a certain distance relative to the bottom shell 110, so that the upper contact sheet 300 can be away from the lower contact sheet 200 and have a gap for inserting the end of the carbon fiber heating element 600, and the end of the carbon fiber heating element 600 can be installed without detaching the cover 120 from the bottom shell 110, thereby improving the assembly efficiency.

[0031] See also Figure 2 In some embodiments of the present invention, the bolt assembly 400 includes a fastening bolt 410 and a nut 420 threadedly connected to the fastening bolt 410, and the surface cover 120 and the bottom shell 110 are respectively provided with a first through hole 121 and a second through hole 112 matching the fastening bolt 410. In some embodiments, the outer contour of the nut 420 is hexagonal, and a hexagonal hole is provided on the bottom surface of the bottom shell 110 to prevent the nut 420 from rotating.

[0032] See also Figure 2 In some embodiments of the present invention, in order to prevent the upper contact piece 300 from translating and failing to contact the end of the carbon fiber heating element 600, the upper contact piece 300 is provided with a through hole 310, and the fastening bolt 410 is movably provided in the first through hole 121, the through hole 310 and the second through hole 112 in sequence. The upper contact piece 300 can only move up and down relative to the axial direction of the fastening bolt 410, thereby ensuring the contact area between the upper contact piece 300 and the end of the carbon fiber heating element 600.

[0033] See also Figure 2 In some embodiments of the present invention, an elastic member 500 capable of driving the upper contact sheet 300 away from the lower contact sheet 200 is provided between the bottom shell 110 and the upper contact sheet 300, and the port 111 faces the sides of the upper contact sheet 300 and the lower contact sheet 200. When the bolt assembly 400 is loosened, the elastic member 500 can drive the upper contact sheet 300 to move upward along with the cover 120, so that a gap into which the end of the carbon fiber heating element 600 can be inserted is automatically formed between the upper contact sheet 300 and the lower contact sheet 200, and no other tools are needed to drive the upper contact sheet 300 away from the lower contact sheet 200, thereby improving assembly efficiency.

[0034] See also Figure 2 In some embodiments of the present invention, the elastic member 500 is a spring, and a positioning column 113 inserted into the lower end of the spring is provided on the bottom shell 110. The upper end of the spring contacts the lower end surface of the upper contact piece 300. The positioning column 113 can prevent the spring from leaving its working position.

[0035] See also Figure 2, the lower contact piece 200 and the corresponding upper contact piece 300 form a contact piece group, that is, the junction box has two contact piece groups. In some embodiments of the present invention, in order to prevent short - circuit of the external power supply caused by contact when the two end parts of the carbon fiber heating element 600 are respectively inserted into the two contact piece groups, an insulating partition (114) for isolating the two lower contact pieces 200 is provided on the bottom shell 110. In this embodiment, the insulating partition (114), the bottom shell 110, and the positioning post 113 are integrally formed by injection molding, which simplifies the production and assembly process and reduces costs.

[0036] See Figure 3 , a carbon fiber heater according to an embodiment of the second aspect of the present invention includes: a carbon fiber heating element 600 and the junction box of any of the above - mentioned technical solutions. The two ends of the carbon fiber heating element 600 are respectively connected with a first carbon fiber terminal 610 and a second carbon fiber terminal 620. The first carbon fiber terminal 610 is clamped between one upper contact piece 300 and the corresponding lower contact piece 200, and the second carbon fiber terminal 620 is arranged between the other upper contact piece 300 and the corresponding lower contact piece 200. The access method of the carbon fiber heating element 600 of the carbon fiber heater with the above - mentioned structure is convenient and reliable, not easily damaging the end parts of the carbon fiber heating element 600, and can ensure the stability of the electrical connection of the carbon fiber heating element 600. Using the carbon fiber heating element 600 to replace the traditional electric heating wire heating element can extend the service life of the heater and is also lighter.

[0037] See Figure 3 , in some embodiments of the present invention, the carbon fiber heater further includes a housing 710. The housing 710 has a cavity with an upward - opening. Inside the cavity, a circuit board assembly 720, a heat - insulating board assembly 730, and a microcrystalline board 740 are distributed from bottom to top. The microcrystalline board 740 is used to close the opening of the cavity. The carbon fiber heating element 600 is located on the heat - insulating board assembly 730 and abuts against the microcrystalline board 740. The power - connecting terminal 210 is welded and fixed on the circuit board assembly 720. The heat - insulating board assembly 730 can separate the circuit board assembly 720 and the carbon fiber heating element 600, avoiding the heat generated by the carbon fiber heating element 600 from being directly transferred to the circuit board assembly 720, thereby protecting the electronic components in the circuit board assembly 720.

[0038] See Figure 3 , in some embodiments of the present invention, the heat - insulating board assembly 730 includes an installation cover 731 connected to the housing 710 and a heat - insulating board 732 accommodated in the installation cover 731. The heat - insulating board 732 is generally made of nano - microporous heat - insulating material. The upper surface of the heat - insulating board 732 is provided with a positioning sink 733 matching the contour shape of the carbon fiber heating element 600, and the positioning sink 733 can prevent the heat - insulating board 732 from moving.

[0039] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A junction box, characterized in that, Comprising: A bottom shell (110); Two lower contact pieces (200), which are arranged at intervals on the bottom shell (110), and a power connection terminal (210) extending out of the bottom shell (110) is arranged on the lower contact piece (200), and the power connection terminal (210) is used for being plugged and welded on a circuit board assembly (720); Two upper contact pieces (300), corresponding to the two lower contact pieces (200) one by one, and the upper contact piece (300) is movably arranged above the corresponding lower contact piece (200); A face cover (120), detachably connected to the bottom shell (110), the face cover (120) and the bottom shell (110) form a box body (100), and two ports (111) for the ends of a carbon fiber heating element (600) to extend into are arranged on the box body (100); The inner wall of the face cover (120) can be abutted against the upper contact piece (300) to clamp the end of the carbon fiber heating element (600) between the lower contact piece (200) and the corresponding upper contact piece (300); the face cover (120) and the bottom shell (110) are connected by a bolt assembly (400); the bolt assembly (400) includes a fastening bolt (410) and a nut (420) screwed with the fastening bolt (410), and a first through hole (121) and a second through hole (112) respectively matched with the fastening bolt (410) are arranged on the face cover (120) and the bottom shell (110); a through hole (310) is arranged on the upper contact piece (300), and the fastening bolt (410) sequentially passes through the first through hole (121), the through hole (310) and the second through hole (112) movably; an elastic member (500) capable of driving the upper contact piece (300) away from the lower contact piece (200) is arranged between the bottom shell (110) and the upper contact piece (300), and the port (111) faces the side parts of the upper contact piece (300) and the lower contact piece (200).

2. The junction box according to claim 1, characterized in that: The elastic member (500) is a spring, and a positioning column (113) inserted into the lower end of the spring is arranged on the bottom shell (110).

3. The junction box according to claim 1, characterized in that: An insulating partition plate (114) for isolating the two lower contact pieces (200) is arranged on the bottom shell (110).

4. A carbon fiber heater, characterized in that, Comprising: A carbon fiber heating element (600) and a junction box according to any one of claims 1-3, and first carbon fiber terminals (610) and second carbon fiber terminals (620) are respectively connected to both ends of the carbon fiber heating element (600), the first carbon fiber terminal (610) is clamped between one of the upper contact pieces (300) and the corresponding lower contact piece (200), and the second carbon fiber terminal (620) is arranged between the other upper contact piece (300) and the corresponding lower contact piece (200).

5. The carbon fiber heater according to claim 4, characterized in that: It further includes a housing (710) which has an upwardly open cavity. A circuit board assembly (720), a heat insulation board assembly (730) and a ceramic glass plate (740) are arranged in the cavity from bottom to top. The ceramic glass plate (740) is used to close the open mouth of the cavity. The carbon fiber heating element (600) is located on the heat insulation board assembly (730) and abuts against the ceramic glass plate (740). The power connection terminal (210) is fixedly welded to the circuit board assembly (720).

6. The carbon fiber heater according to claim 5, characterized in that: The heat insulation board assembly (730) includes a mounting cover (731) connected to the housing (710) and a heat insulation board (732) accommodated in the mounting cover (731). A positioning sunk groove (733) matching the contour shape of the carbon fiber heating element (600) is provided on the upper surface of the heat insulation board (732).

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