阅读说明：本技术 一种平台化轻量化汽车电源正极保险盒 (Platformized light automobile power supply positive fuse box ) 是由 刘凤军 孙新普 王荣喜 祁顶春 马东东 范文涛 张永威 于 2021-01-25 设计创作，主要内容包括：本发明提出一种平台化轻量化汽车电源正极保险盒,用以解决现有保险盒结构及零部件布局均在一个平面内,致使其外形尺寸较大、重量较重的技术问题。本发明包括主体,所述主体上设置有若干个铜导体,铜导体上连接有保险丝,且铜导体和保险丝均通过紧固件与外部电路相连接。本发明通过改变铜导体的连接方式,实现回路的不同连接关系,形成新的电源分配回路,进而实现产品平台化；通过在保险盒的多个平面布局设计结构及零部件,且将铜导体与自扣紧螺栓采用凸点连接的方式连接在一起,实现产品平台化、小型化、轻量化的目的。(The invention provides a platformized light automobile power supply positive fuse box, which is used for solving the technical problems of larger overall dimension and heavier weight of the conventional fuse box due to the fact that the structure and the layout of parts of the conventional fuse box are in the same plane. The fuse comprises a main body, wherein a plurality of copper conductors are arranged on the main body, fuses are connected to the copper conductors, and the copper conductors and the fuses are connected with an external circuit through fasteners. According to the invention, different connection relations of the circuits are realized by changing the connection mode of the copper conductors, so that a new power distribution circuit is formed, and further, the product platformization is realized; through a plurality of plane layout design structures and spare parts at the fuse box, and adopt the mode of bump connection with the self-clinching bolt with the copper conductor and link together, realize the purpose of product platformization, miniaturization, lightweight.)

1. The utility model provides a anodal fuse block of platform lightweight automotive power supply which characterized in that: the novel fuse is characterized by comprising a main body (1), wherein a plurality of copper conductors (2) are arranged on the main body (1), fuses (4) are connected to the copper conductors (2), and the copper conductors (2) and the fuses (4) are connected with an external circuit through fasteners.

2. The platformized light-weight automobile power supply positive fuse box according to claim 1, characterized in that: the main body (1) comprises a main body A surface, a main body B surface, a main body C surface, a main body D surface and a main body E surface, the main body A surface is positioned on the upper surface of the main body (1), the main body B surface and the main body C surface are respectively positioned on the front surface and the rear surface of the main body (1), and the main body D surface and the main body E surface are respectively positioned on the left surface and the right surface of the main body (1); and the copper conductor (2) is respectively fixed on the A surface of the main body, the B surface of the main body and the C surface of the main body, and the D surface of the main body and the E surface of the main body are respectively provided with a fixing bracket (8) for fixing the main body (1).

3. The platformized and light-weight automobile power supply positive fuse box according to claim 2, characterized in that: the copper conductor (2) comprises a first copper conductor (21), a second copper conductor (22), a third copper conductor (23), a fourth copper conductor (24) and a fifth copper conductor (25), wherein one ends of the first copper conductor (21), the second copper conductor (22) and the third copper conductor (23) are fixed on the main body (1) through fasteners I (31) to form a current input port or a current output port to be connected with an external circuit; the other ends of the first copper conductor (21), the second copper conductor (22) and the third copper conductor (23) are fixedly connected with the fuse (4) through a fastener II (32), and the fuse (4), the fourth copper conductor (24) and the fifth copper conductor (25) are fixed on the main body (1) through a fastener III (33) to form a current output port to be connected with an external circuit.

4. The platformized and light-weight automobile power supply positive fuse box according to claim 3, characterized in that: the side-view cross sections of the first copper conductor (21), the second copper conductor (22) and the third copper conductor (23) are all L-shaped structures, the horizontal section of the first copper conductor (21) is fixed on the A surface of the main body through two fasteners I (31) and forms a first current input port and a first current output port respectively, and the horizontal sections of the second copper conductor (22) and the third copper conductor (23) are fixed on the A surface of the main body through the fasteners I (31) and form a second current input port and a third current input port respectively; the vertical sections of the first copper conductor (21) and the second copper conductor (22) are fixed on the surface B of the main body, and the vertical section of the third copper conductor (23), the fourth copper conductor (24) and the fifth copper conductor (25) are fixed on the surface C of the main body.

5. The platformized and light-weight automobile power supply positive fuse box according to claim 4, characterized in that: the first and third current input ports are connected in series by a copper conductor six (26) and form a fourth current input port.

6. The platformized light-weight automobile power supply positive fuse box according to claim 4 or 5, characterized in that: the lower part of the vertical section of the first copper conductor (21) is fixedly connected with a second fuse (42), a third fuse (43), a fifth fuse (45) and a sixth fuse (46) through four fasteners II (32) respectively, the lower part of the vertical section of the first copper conductor (21) is fixedly connected with a seventh fuse (47) and an eighth fuse (48) through two fasteners II (32) respectively, and the second fuse (42), the third fuse (43), the fifth copper conductor (25), the fifth fuse (45), the sixth fuse (46), the seventh fuse (47), the eighth fuse (48) and the fourth copper conductor (24) are fixed on the main body (1) through fasteners III (33) respectively and correspondingly form a second current output port, A third current output port, a fourth current output port, a fifth current output port, a sixth current output port, a seventh current output port, an eighth current output port, and a ninth current output port; and a fourth fuse (44) and a ninth fuse (49) are further arranged on the surface B of the main body, the fourth fuse (44) is respectively connected with the third copper conductor (23) and the fifth copper conductor (25), and the ninth fuse (49) is respectively connected with the third copper conductor (23) and the fourth copper conductor (24).

7. The platformized and light-weight automobile power supply positive fuse box according to claim 6, characterized in that: the first fuse (41), the second fuse (42), the third fuse (43), the fifth fuse (45), the sixth fuse (46), the seventh fuse (47) and the eighth fuse (48) are all flat-plate fuses, the fourth fuse (44) is a box-type fuse, and the ninth fuse (49) is a sheet-type fuse.

8. The platformized and light-weight automobile power supply positive fuse box according to claim 7, characterized in that: the lower part of the vertical section of the copper conductor III (23) is provided with two pins I, and the pins I are bent inwards by 90 degrees, are horizontally inserted into the main body (1) and are respectively connected with a fourth fuse (44) and a ninth fuse (49); the upper part of the copper conductor four (24) is provided with a pin II which is horizontally inserted in the main body (1) and is connected with a ninth fuse (49); the upper part of the copper conductor five (25) is provided with a pin III, and the pin III is horizontally inserted in the main body (1) and connected with a fourth fuse (44).

9. The platformized and light-weight automobile power supply positive fuse box according to claim 8, characterized in that: the pin II and the pin I connected with the ninth fuse (49) are both in a tuning fork structure, and the pin III and the pin I connected with the fourth fuse (44) are both in a plug structure.

10. The platformized light-weight automobile power supply positive fuse box according to any one of claims 2 to 5, 7, 8 and 9, characterized in that: the main part A face is equipped with upper cover (5), the main part B face is equipped with protecgulum (6), the main part C face is equipped with back lid (7).

Technical Field

The invention relates to the technical field of automobile fuse boxes, in particular to a platformized light automobile power supply positive fuse box.

Background

The main function of the automobile power supply positive fuse box is to perform overload protection on the wire when the current of a loop of a large-current load of a vehicle is sharply increased or short-circuited, so as to avoid burning the wire. In order to shorten the development period of new products and reduce development cost and development risk, the automobile factory requires the new products to be designed to implement a platformization strategy, and the functional requirements of different automobile types are met by locally adjusting the design structure and the number of parts of the products. With increasingly strict environmental requirements, the national requirements on automobile exhaust emission are more and more strict, and the implementation of measures of light weight and miniaturization of automobile parts is an effective method for low carbon emission reduction. The automobile factory requires that the external dimension of the positive electrode fuse box of the automobile power supply is as small as possible and the weight of used parts is as light as possible on the premise of meeting the functions. And current product is in order to satisfy the functional requirement development many products of different motorcycle types, and product structure and spare part overall arrangement all are in a plane moreover, cause the product overall dimension great, and product weight is heavier.

Disclosure of Invention

Aiming at the technical problems that the existing fuse box structure and the layout of parts are in the same plane, so that the overall dimension is large and the weight is heavy, the invention provides a platformization light-weight automobile power supply positive fuse box.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a anodal fuse block of platform ization lightweight auto power supply, includes the main part, be provided with a plurality of copper conductor in the main part, be connected with the fuse on the copper conductor, and copper conductor and fuse all are connected with external circuit through the fastener.

The main body comprises a main body A surface, a main body B surface, a main body C surface, a main body D surface and a main body E surface, wherein the main body A surface is positioned on the upper surface of the main body, the main body B surface and the main body C surface are respectively positioned on the front surface and the rear surface of the main body, and the main body D surface and the main body E surface are respectively positioned on the left surface and the right surface of the main body; and the copper conductor is fixed respectively on main part A face, main part B face and main part C face, all is provided with the fixed bolster that is used for fixed main part on main part D face and the main part E face.

The copper conductor comprises a first copper conductor, a second copper conductor, a third copper conductor, a fourth copper conductor and a fifth copper conductor, wherein one ends of the first copper conductor, the second copper conductor and the third copper conductor are fixed on the main body through fasteners I to form a current input port or a current output port to be connected with an external circuit; the other ends of the first copper conductor, the second copper conductor and the third copper conductor are fixedly connected with the fuse through fasteners II, and the fuse, the fourth copper conductor and the fifth copper conductor are fixed on the main body through fasteners III to form a current output port to be connected with an external circuit.

The side-view cross sections of the first copper conductor, the second copper conductor and the third copper conductor are all L-shaped structures, the horizontal section of the first copper conductor is fixed on the surface A of the main body through two fasteners I and respectively forms a first current input port and a first current output port, and the horizontal sections of the second copper conductor and the third copper conductor are fixed on the surface A of the main body through the fasteners I and respectively form a second current input port and a third current input port; the vertical sections of the first copper conductor and the second copper conductor are fixed on the surface B of the main body, and the vertical section of the third copper conductor, the fourth copper conductor and the fifth copper conductor are fixed on the surface C of the main body.

The first current input port and the third current input port are connected in series by a sixth copper conductor and form a fourth current input port.

The lower part of the vertical section of the first copper conductor is fixedly connected with a second fuse, a third fuse, a fifth fuse and a sixth fuse through four fasteners II respectively, the lower part of the vertical section of the third copper conductor is fixedly connected with a seventh fuse and an eighth fuse through two fasteners II respectively, and the second fuse, the third fuse, the fifth copper conductor, the fifth fuse, the sixth fuse, the seventh fuse, the eighth fuse and the fourth copper conductor are fixed on the main body through fasteners III and respectively form a second current output port, a third current output port, a fourth current output port, a fifth current output port, a sixth current output port, a seventh current output port, an eighth current output port and a ninth current output port correspondingly; and a fourth fuse and a ninth fuse are further arranged on the surface B of the main body, the fourth fuse is respectively connected with the third copper conductor and the fifth copper conductor, and the ninth fuse is respectively connected with the third copper conductor and the fourth copper conductor.

The first fuse, the second fuse, the third fuse, the fifth fuse, the sixth fuse, the seventh fuse and the eighth fuse are all flat plate fuses, the fourth fuse is a box fuse, and the ninth fuse is a sheet fuse.

The lower part of the vertical section of the copper conductor III is provided with two pins I, and the pins I are bent inwards by 90 degrees, are horizontally inserted into the main body and are respectively connected with a fourth fuse and a ninth fuse; the upper part of the copper conductor IV is provided with a pin II which is horizontally inserted in the main body and is connected with the ninth fuse; and the upper part of the copper conductor five is provided with a pin III, and the pin III is horizontally inserted in the main body and is connected with the fourth fuse.

The pin II and the pin I connected with the ninth fuse are both in a tuning fork structure, and the pin III and the pin I connected with the fourth fuse are both in a plug structure.

The main part A face is equipped with the upper cover, and the main part B face is equipped with the protecgulum, is equipped with the back lid on the main part C face.

The invention has the beneficial effects that: 1. different connection relations of the circuits are realized by changing the connection mode of the copper conductors, a new power distribution circuit is formed, and then product platformization is realized; 2. the product platformization is realized by increasing or decreasing the insurance quantity of the power distribution loop; 3. part of copper conductors are laid on the rear side face of the main body, and pins bent by 90 degrees are arranged on the copper conductors to penetrate through the main body and be inserted with other fuses arranged on the front side face of the main body to form other power distribution loops, so that the miniaturization of products is realized; 4. the mounting structures are arranged on the left side surface and the right side surface of the main body, so that the overall dimension of the product is reduced, and the miniaturization of the product is realized; 5. through using from the straining bolt, and copper conductor adopts the mode of bump connection with from the straining bolt to link together to realize the product lightweight.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an electrical connection diagram of embodiment 1 of the present invention;

fig. 2 is a schematic front view of a main body according to embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a back structure of a main body according to embodiment 1 of the present invention;

FIG. 4 is a schematic front view of the overall structure of embodiment 1 of the present invention;

FIG. 5 is a schematic rear view of the overall structure of embodiment 1 of the present invention;

FIG. 6 is an electrical connection diagram according to embodiment 2 of the present invention;

FIG. 7 is a schematic front view of a main body according to embodiment 2 of the present invention;

FIG. 8 is a schematic view of the back side structure of the main body according to embodiment 2 of the present invention;

FIG. 9 is an electrical connection diagram according to embodiment 3 of the present invention;

FIG. 10 is a schematic front view of a main body according to embodiment 3 of the present invention;

fig. 11 is a schematic back structure view of the main body according to embodiment 3 of the present invention.

In the drawing, 1 is a main body, 2 is a copper conductor, 21 is a first copper conductor, 22 is a second copper conductor, 23 is a third copper conductor, 24 is a fourth copper conductor, 25 is a fifth copper conductor, 26 is a sixth copper conductor, 31 is a first fastener, 32 is a second fastener, 4 is a fuse, 41 is a first fuse, 42 is a second fuse, 43 is a third fuse, 44 is a fourth fuse, 45 is a fifth fuse, 46 is a sixth fuse, 47 is a seventh fuse, 48 is an eighth fuse, 49 is a ninth fuse, 5 is an upper cover, 6 is a front cover, 7 is a rear cover, and 8 is a fixing bracket.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Embodiment 1, as shown in fig. 2 and 3, the invention provides a platformized light-weight automobile power supply positive fuse box, which includes a main body 1, wherein a plurality of copper conductors 2 are arranged on the main body 1, fuses 4 are connected to the copper conductors 2, and the copper conductors 2 and the fuses 4 are connected with an external circuit through fasteners, so that current input and output of the fuse box are realized. Specifically, the main body 1 comprises a main body A surface, a main body B surface, a main body C surface, a main body D surface and a main body E surface, wherein the main body A surface is positioned on the upper surface of the main body 1, the main body B surface and the main body C surface are respectively positioned on the front surface and the rear surface of the main body 1, and the main body D surface and the main body E surface are respectively positioned on the left surface and the right surface of the main body 1. Copper conductor 2 is fixed respectively on main part A face, main part B face and main part C face, realizes that main part 1 can the overall arrangement circuit on three faces to form new power distribution return circuit, realize the product platformization. As shown in fig. 4 and 5, the main body a is provided with an upper cover 5 on the surface, the main body B is provided with a front cover 6 on the surface, and the main body C is provided with a rear cover 7 on the surface. All be provided with the fixed bolster 8 that is used for fixed main part 1 on main part D face and the main part E face, fixed bolster 8 is the metal support, and in this embodiment, fixed bolster 8 is the guide rail structure of vertical setting, and the installation of being convenient for has reduced the overall dimension of product, realizes that the product is miniaturized.

Further, the copper conductor 2 comprises a first copper conductor 21, a second copper conductor 22, a third copper conductor 23, a fourth copper conductor 24 and a fifth copper conductor 25, the first copper conductor 21, the second copper conductor 22, the third copper conductor 23, the fourth copper conductor 24 and the fifth copper conductor 25 are designed according to the thickness of a corresponding material selected by current carrying capacity, and a certain number of round holes with different sizes are formed in different positions and used for inserting corresponding fasteners. One ends of the first copper conductor 21, the second copper conductor 22 and the third copper conductor 23 are fixed on the main body 1 through fasteners I31 and form a current input port or a current output port to be connected with an external circuit; the other ends of the first copper conductor 21, the second copper conductor 22 and the third copper conductor 23 are fixedly connected with the fuse 4 through a fastener II 32, and the fuse 4, the fourth copper conductor 24 and the fifth copper conductor 25 are fixed on the main body 1 through a fastener III 33 and form a current output port to be connected with an external circuit. Preferably, the side-view cross-section of each of the first copper conductor 21, the second copper conductor 22 and the third copper conductor 23 is an L-shaped structure, the horizontal sections of the first copper conductor 21 are fixed on the a surface of the main body through fasteners I31 No. 1 and 4 respectively and form a first current input port I1 and a first current output port O1 respectively, the horizontal sections of the second copper conductor 22 and the third copper conductor 23 are fixed on the a surface of the main body through fasteners I31 No. 2 and 3 respectively and form a second current input port I2 and a third current input port I3 respectively, the first current input port I1 and the second current input port I2 are sequentially arranged in parallel, and the third current input port I3 is arranged separately and connected with an external circuit through the corresponding fastener I31 to realize circuit conduction.

The vertical sections of the first copper conductor 21 and the second copper conductor 22 are fixed on the surface B of the main body through a fastener II 32, and the vertical sections of the first copper conductor 21 and the second copper conductor 22 are fixedly connected with a first fuse 41 through the fastener II 32, namely two ends of the first fuse 41 are respectively fixed on the first copper conductor 21 and the second copper conductor 22 through fasteners II 32 No. 5 and 6, so that a first current output port O1 is connected with the first current input port I1, and the first current output port O1 is connected with the second current input port I2 through the first fuse 41. The lower part of the vertical section of the first copper conductor 21 is fixedly connected with the upper ends of a second fuse 42, a third fuse 43, a fifth fuse 45 and a sixth fuse 46 through fasteners II 32 of No. 7, No. 9, No. 11 and No. 13 respectively, and the lower ends of the second fuse 42, the third fuse 43, the fifth fuse 45 and the sixth fuse 46 are fixed on the main body 1 through fasteners III 33 of No. 8, No. 10, No. 12 and No. 14 respectively and correspondingly form a second current output port O2, a third current output port O3, a fifth current output port O5 and a sixth current output port O6 respectively. As shown in fig. 1, the second current output port O2, the third current output port O3, the fifth current output port O5 and the sixth current output port O6 are sequentially arranged in parallel, the second current output port O2 is connected to the first current input port I1 through a second fuse 42, the third current output port O3 is connected to the first current input port I1 through a third fuse 43, the fifth current output port O5 is connected to the first current input port I1 through a fifth fuse 45, the sixth current output port O6 is connected to the first current input port I1 through a sixth fuse 46, the second current output port O2 is connected to the second current input port I2 through the second fuse 42 and the first fuse 41 in sequence, the third current output port O3 is connected to the second current input port I2 through the third fuse 43 and the first fuse 41 in sequence, and the fifth current output port O5 is connected to the second current input port I2 through the fifth fuse 45 and the fifth fuse 45 in sequence, The first fuse 41 is connected to the second current input port I2, and the sixth current output port O6 is connected to the second current input port I2 through the sixth fuse 46 and the first fuse 41 in this order.

The vertical section of the copper conductor III 23 is fixed on the surface C of the main body through a fastener II 32, the lower part of the vertical section of the copper conductor III 23 is fixedly connected with the upper ends of a seventh fuse 47 and an eighth fuse 48 through fasteners II 32 No. 15 and No. 17 respectively, the lower ends of the seventh fuse 47 and the eighth fuse 48 are fixed on the main body 1 through fasteners III 33 No. 16 and No. 18 respectively and correspondingly form a seventh current output port O7 and an eighth current output port O8 respectively; the copper conductor four 24 and the copper conductor five 25 are respectively fixed on the main body 1 through fasteners III 33 No. 19 and 20 and respectively form a fourth current output port O4 and a ninth current output port O9. The surface B of the main body is also provided with a fourth fuse 44 and a ninth fuse 49, the fourth fuse 44 is respectively connected with the third copper conductor 23 and the fifth copper conductor 25, and the ninth fuse 49 is respectively connected with the third copper conductor 23 and the fourth copper conductor 24. The fourth current output port O4, the seventh current output port O7, the eighth current output port O8 and the ninth current output port O9 are sequentially connected in parallel, the fourth current output port O4 is connected to the third current input port I3 through a fourth fuse 44, the seventh current output port O7 is connected to the third current input port I3 through a seventh fuse 47, the eighth current output port O8 is connected to the third current input port I3 through an eighth fuse 48, and the ninth current output port O9 is connected to the third current input port I3 through a ninth fuse 49.

In this embodiment, the fasteners i 31 No. 1, 3 and 4 and the fasteners ii 32 No. 5, 6, 9, 11 and 15 are self-fastening bolts and are connected with the corresponding copper conductors in a bump connection manner. The riveting part of the self-fastening bolt is of a dentate convex structure, and compared with the common bolt, the self-fastening bolt has the advantages of less used materials, shorter overall length and lighter weight. No. 2 fasteners I31 and No. 7, No. 13 and No. 17 fasteners II 32 and No. 8, No. 10, No. 12, No. 14, No. 16, No. 18, No. 19 and No. 20 fasteners III 33 are embedded with the main body so as to ensure the connection between the corresponding copper conductors and fuses and the main body.

Furthermore, the lower part of the vertical section of the copper conductor III 23 is provided with two pins I, the pins I are bent inwards by 90 degrees and are horizontally inserted into the main body 1 and are respectively connected with a fourth fuse 44 and a ninth fuse 49; the upper part of the copper conductor four 24 is provided with a pin II which is horizontally inserted in the main body 1 and is connected with a ninth fuse 49; the upper part of the copper conductor five 25 is provided with a pin iii, the pin iii is horizontally inserted into the main body 1 and connected with the fourth fuse 44, so as to realize the connection between the copper conductor three 23 and the copper conductor four 24 and the copper conductor five 25 respectively, and the current input from the third current input port I3 can be output through the fourth current output port O4 or the ninth current output port O9. In this embodiment, the first fuse 41, the second fuse 42, the third fuse 43, the fifth fuse 45, the sixth fuse 46, the seventh fuse 47, and the eighth fuse 48 are all flat fuses, the fourth fuse 44 is a box fuse, and the ninth fuse 49 is a chip fuse. The two pins of the box-type fuse are respectively spliced with one pin I of the copper conductor three 23 and a pin III of the copper conductor five 25, the two pins of the chip-type fuse are respectively connected with the other pin I of the copper conductor three 23 and a pin II of the copper conductor four 24, preferably, the pin II and the pin I connected with the nine fuse 49 are both in a tuning fork structure, and the pin III and the pin I connected with the fourth fuse 44 are both in a plug structure, so that the requirement of completing multifunctional layout in a narrow space proposed by a customer is met.

In embodiment 2, as shown in fig. 7 and 8, the first current inlet I1 and the third current inlet I3 are connected in series through the six copper conductors 26 to form a fourth current inlet, that is, a new power distribution loop is formed. As shown in fig. 6, the second current input port I2 and the fourth current input port I4 are arranged in parallel, the first current output port O1 is connected to the fourth current input port I4, and the first current output port O1 is connected to the second current input port I2 through the first fuse 41; the current output ports O2-O9 are respectively connected with the fourth current input port I4 through corresponding fuses 42-49, the current output ports O2-O9 are respectively connected with the first fuse 41 through corresponding fuses 42-49, and the first fuse 41 is connected with the second current input port I2, so that current transmission is achieved.

The other structure is the same as embodiment 1.

In embodiment 3, as shown in fig. 10 and 11, in this embodiment, the second fuse 42, the fifth fuse 45, the sixth fuse 46, the fourth fuse 44, and the seventh fuse 47 in embodiment 1 or embodiment 2 are removed, and the corresponding fasteners ii 32 and iii 33 of fasteners 11 and 15 and fasteners 8, 12, 14, 16, and 20 are removed. That is, in the present embodiment, only the first fuse 41, the third fuse 43, the eighth fuse 48, and the ninth fuse 49 are provided, and the corresponding fasteners i 31 and i 31 of fasteners No. 1, 2, 3, and 4, and fasteners ii 32 of fasteners 5, 6, 7, 9, 13, and 17, and fasteners iii 33 of fasteners 10, 18, and 19 are retained. Correspondingly, as shown in fig. 9, in the present embodiment, only the first current output port O1, the third current output port O3, the eighth current output port O8 and the ninth current output port O9 are provided, and the first current output port O1 is connected to the first current input port I1, the third current output port O3 is connected to the first current input port I1 through the third fuse 43, and the third current output port O3 is connected to the second current input port I2 through the third fuse 43 and the first fuse 41 in sequence; the eighth current output port O8 is connected to the third current input port I3 through an eighth fuse 48, and the ninth current output port O9 is connected to the third current input port I3 through a ninth fuse 49.

The other structure is the same as embodiment 1.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.