SAFETY AND METHOD FOR ITS MANUFACTURING

Abstract

The present invention provides a fuse that achieves a reduction in height even when an external fuse can be installed, and a method for manufacturing the fuse. A fuse (600) comprises a busbar (100) with an input terminal (110), an external terminal (120), a circuit unit (200), and a fusible link (113) provided between the input terminal (110) and the external terminal (120), as well as a housing (500) covering the busbar (100). The circuit unit (200) is configured to allow the installation of an external fuse (700) with a fusible link (730) and a connecting terminal (720).

Description

TECHNICAL AREA

[0001] The present invention relates to a fuse, which is mainly used for an electrical circuit of a motor vehicle or the like, and to a method for manufacturing the fuse. BACKGROUND ART

[0002] Traditionally, fuses are used to protect an electrical circuit mounted in a motor vehicle or similar vehicle, and various electrical components connected to that circuit. Specifically, if an unintentional overcurrent flows through the circuit, the fuse's fusible link melts due to the heat generated by the overcurrent, thus protecting the various electrical components and preventing excessive current from flowing.

[0003] Depending on the application, there are various types of fuses. For example, the fuse described in patent specification 1 comprises a busbar with an input terminal, an external terminal, and a fuse link between the input and external terminals, as well as a housing that covers the busbar. A fuse connection terminal and an external fuse connection terminal are provided above the busbar, and an external fuse connection terminal is paired with the fuse connection terminal. An external fuse can be installed by inserting it into the fuse connection terminal and the external fuse link. Therefore, if the vehicle type of a motor vehicle changes or the load on various electrical components changes, an external fuse with a different rating can be easily replaced to accommodate the change.However, since a structure for attaching an external fuse (a fuse-side external connection or similar) is provided separately from the busbar, if the arrangement of the external fuse is changed, both the structure on the busbar and the structure for attaching the external fuse must be changed, which is cumbersome. LIST OF CAPLETS PATENT LITERATURE

[0004] Patent literature 1: Published Japanese patent application 2018-010768 SUMMARY OF THE INVENTIONAL ENGINEERING PROJECTS

[0005] In view of the above problems, the present invention therefore provides a safety device in which the arrangement of an external safety device can be changed easily and flexibly, as well as a method for manufacturing the safety device. SOLUTIONS TO THE TASKS

[0006] A fuse according to the present invention is a fuse comprising a busbar with an input terminal, an external terminal and a circuit unit and a fusible link provided between the input terminal and the external terminal and a housing that covers at least part of the busbar, and the circuit unit is designed such that an external fuse comprising a fusible link and a connection terminal can be attached to it.

[0007] Since the external fuse is mounted directly on the circuit unit, its position can be easily and flexibly changed by modifying the circuit unit's design. For example, if the circuit unit has a flat, plate-shaped design, the external fuses are arranged linearly above and below the fuse sections, as shown in Fig. 12 shown. As in Fig. As shown in Figure 14, the height of the circuit unit is reduced when the circuit unit is designed to include the curved part, and the position of the external fuse is also reduced, which contributes to the height reduction. If the circuit unit is designed as in Figure 14, the height of the circuit unit is reduced. Fig. As shown in Figure 1, which is essentially U-shaped and comprises a main body and a side wall section opposite each other, the height of the circuit unit is further reduced and the arrangement position of the external fuse is further reduced, contributing to the height reduction.

[0008] In the fuse according to the invention, a mounting opening is formed in a part of the circuit unit, to which the external fuse can be attached.

[0009] Because of this property, the external fuse is connected to the circuit unit in a state where the position and orientation of the external fuse are more stable.

[0010] In the fuse according to the invention, the circuit unit comprises a main body and a lateral wall section, which are opposite each other.

[0011] Since the circuit unit comprises the main body and the side wall section, which are opposite each other, the height of the circuit unit is further reduced, and the position of the external fuse is further reduced, which contributes to the height reduction of the fuse.

[0012] In the safety device according to the invention, the main body and the side wall section are formed by folding back an upper end side of the circuit unit.

[0013] Since the main body and the side wall section are formed in one piece by folding back the upper end of the circuit unit, it is not necessary to provide a separate connection structure (e.g., a conventional fuse-side external melting section or similar) as a section for the electrical connection of the external fuse and the circuit unit, and it is possible to reduce the number of parts, lower manufacturing costs, and improve manufacturing efficiency.

[0014] In the safety device according to the invention, the lateral opening section comprises a plate-shaped connecting connection extending from the mounting opening, and the male connecting connection is designed so that it can be connected to a female connecting connection of the external safety device.

[0015] Due to the above-mentioned features, the structure of the part that electrically connects the external fuse and the fuse circuit unit is simplified, manufacturing costs can be reduced and manufacturing efficiency improved.

[0016] In the fuse according to the invention, the housing is provided with a receiving section that can accommodate the external fuse.

[0017] Thanks to this property, the external fuse can be easily attached.

[0018] A method for manufacturing a fuse according to the present invention is a method for manufacturing a fuse comprising a busbar with an input terminal, an external terminal, and a circuit unit, and a fusible section provided between the input terminal and the external terminal, and a housing covering at least a part of the busbar, wherein the method comprises: folding back a side of the upper end of the circuit unit to form a main body and a side wall section opposing each other, and an upper opening section connecting the main body and the side wall section; and cutting out a part of the circuit unit to form an open mounting opening, wherein the mounting opening is configured to allow the installation of an external fuse comprising a fusible section and a connecting terminal.

[0019] Since the external fuse is mounted directly on the circuit unit, its position can be easily and flexibly changed by modifying the circuit unit's design. Furthermore, the inclusion of a mounting hole for inserting and installing the external fuse allows the circuit unit to be kept low, thus reducing the fuse's overall height even when it is already installed. ADVANTAGEOUS EFFECTS OF THE INVENTION

[0020] As described above, in the locking mechanism according to the invention and the method for manufacturing the locking mechanism, the design of the arrangement position of the external locking device can be changed easily and flexibly. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective overall view of a busbar of a fuse according to a first embodiment of the present invention. Fig. 2(a) is a front view of a busbar and Fig. 2(b) is a rear view of the busbar. Fig. 3(a) is a top view of a busbar, and Fig. 3(b) is a side view of the busbar. Fig. Figure 4 is a perspective overall view of a housing section of a fuse housing. Fig. 5(a) is a perspective overall view of a front side of a housing section, and Fig. 5(b) is a perspective overall view of a rear side of the housing section. Fig. 6(a) is a rear view of a housing section, and Fig. 6(b) is a top view of the housing section. Fig. 7(a) is a perspective overview of an external backup, and Fig. 7(b) is a cross-sectional view along line AA. Fig. Figure 8 is a perspective exploded view of the fuse. Fig. Figure 9 is a perspective overall view of the mounted fuse. Fig. 10(a) is a front view of the fuse, and Fig. 10(b) is a top view of the safety device. Fig. 11(a) is a cross-sectional view along line BB of Fig. 10(b), and Fig. 11(b) is a cross-sectional view along line CC of Fig. 10(b). Fig. Figure 12 is a perspective overall view of a busbar according to a second embodiment of the present invention. Fig. Figure 13 is a perspective overall view of a busbar according to a third embodiment of the present invention. Fig. Figure 14 is a perspective overall view of a busbar according to a fourth embodiment of the present invention. REFERENCE MARK LIST 100 busbar 110 Input connection 120 external connection 113 Melting section 200 circuit units 210 Main body 220 side wall section 230 upper wall section 240 Mounting opening 500 cases 600 fuse 720 connection port 730 Melting section 700 external backup DESCRIPTION OF THE EXECUTION FORMS

[0021] Each embodiment of the present invention is described below with reference to the drawings. The shape, material, and the like of the individual elements of the locking mechanism in the embodiment described below are merely examples and are not limited to them. <Erste Ausführungsform>

[0022] In the Fig. Figures 1 to 3 show a busbar 100 of a fuse 600 according to a first embodiment of the present invention. Fig. Figure 1 is a perspective overall view of busbar 100, Fig. 2(a) is a front view of busbar 100, Fig. 2(b) is a rear view of busbar 100, Fig. 3(a) is a top view of busbar 100, and Fig. 3(b) is a side view of busbar 100.

[0023] As in Fig. As shown in Figure 1, the busbar 100 is formed by stamping a flat, plate-shaped element of uniform thickness from a conductive metal such as copper or an alloy thereof into a predetermined shape using a stamping machine or the like. It comprises an input terminal 110, which can be supplied by a battery or the like, a plurality of fusible links 120, and a circuit unit 200. The input terminal 110 is connected to the circuit unit 200, and the external terminal 120 is connected to the circuit unit 200 via a fusible link 113. Therefore, if an overcurrent flows from a power source, such as a battery connected to the input terminal 110, the fusible link 113 melts, thus protecting loads of various electrical components and the like connected to the external terminal 120.

[0024] Furthermore, the circuit unit 200 is bent and shaped during the manufacture of the busbar 100 after a flat, plate-shaped element of uniform thickness has been stamped into a predetermined shape using a stamping machine or similar equipment. Specifically, the upper end of the flat, plate-shaped circuit unit 200 is folded back in a U-shape to form the main body 210, the side wall section 220, and the upper wall section 230, which connects the main body 210 and the side wall section 220. The main body 210 and the side wall section 220 are separated from each other and arranged parallel to each other. In addition, the input terminal 110 is connected to the main body 210, and the external terminal 120 is connected to the main body 210 via the fused section 113.It should be noted that a fastening opening 201 is provided in the side wall section 220 and a fastening pin 202 is provided in the main body 210, through which a housing to be described later can be passed.

[0025] Furthermore, a portion of the side of the upper end of the circuit unit 200 is cut out to form an upward-opening mounting opening 240. Specifically, the mounting opening 240 comprises a top opening 241, which is opened by cutting out the top opening section 230 of the circuit unit 200, and a side opening 242, which is opened by cutting out the side opening section 220. The top opening 241 and the side opening 242 are through-holes. The mounting opening 240 is designed to allow the insertion of an external fuse 700, which will be described later. Additionally, a section extending to the underside of the side opening 242 of the mounting opening 240 is a portion of the plate-shaped side wall section 220 that remains uncut, and this section becomes the plate-shaped male connection terminal 250, which is connected to the external fuse 700.

[0026] It should be noted that the circuit unit 200 is essentially U-shaped to enclose the flat upper wall section 230, but is not limited to this and can have any shape, such as an essentially V-shape, as long as the circuit unit comprises the main body 210 and the side wall section 220, which are opposite each other. Furthermore, although the main body 210 and the side wall section 220, which face each other, are arranged parallel to each other, the present invention is not limited to this, and the main body 210 and the side wall section 220 can be arranged in any position, as long as the main body and the side wall section are separated from each other.Furthermore, the circuit unit 200 comprises, but is not limited to, the main body 210, the side wall section 220 and the upper wall section 230 by bending a flat, plate-shaped element, and the main body 210, the side wall section 220 and the upper wall section 230 can be individually shaped, and the main body 210, the side wall section 220 and the upper wall section 230 can be connected and fastened together to form the substantially U-shaped circuit unit 200.

[0027] Below, a housing 500 of a fuse 600 according to the present invention is described with reference to Fig. 4 described. The housing 500 comprises a pair of housing sections 300 and 400. Fig. Figure 4 is a perspective overall view of housing section 300.

[0028] As in Fig. As shown in Figure 4, the housing section 300 is made of a synthetic resin and has a substantially rectangular shape. It comprises an upper end receiving section 310, which accommodates the switching unit 200 of the busbar 100; a middle end receiving section 320, which accommodates the fusible link 113 of the busbar 100; and a lower end receiving section 330, which accommodates the upper end (the side connected to the fusible link 113) of the outer terminal 120 of the busbar 100. An opening 312 is formed in the upper wall 311 of the upper end receiving section 310, into which an external fuse 700, which will be described later, can be inserted. Furthermore, the upper end receiving section 310 is provided with a mounting opening 313, and the lower end receiving section 330 is provided with a mounting opening 333.In addition, a viewing window 301 made of a transparent resin is provided in the middle intake section 320, so that the melting section 113 of the busbar 100 housed in the housing section 300 can be viewed from the outside.

[0029] The housing section 400 is described below with reference to the Fig. 5 and Fig. 6 described. Fig. 5(a) is a perspective overall view of the front of housing section 400, Fig. 5(b) is a perspective overall view of the rear of housing section 400, Fig. 6(a) is a rear view of housing section 400, and Fig. Figure 6(b) is a top view of housing section 400.

[0030] As in the Fig. 5 and Fig. As shown in Figure 6, the housing section 400 is made of synthetic resin and has a substantially rectangular shape corresponding to the shape of the housing section 300, so that the busbar 100, which is housed in the housing section 300, can be sandwiched in and covered. In particular, the housing section 400 comprises an upper end receiving section 410, which receives the switching unit 200 of the busbar 100, a middle end receiving section 420, which receives the fusible link 113 of the busbar 100, and a lower end receiving section 430, which receives the upper end (side connected to the fusible link 113) of the outer terminal 120 of the busbar 100. A receiving section 450 is provided on the front face of the upper end receiving section 410, which is recessed towards the front face so that it extends from the upper end receiving section 410.The receiving section 450 is designed to receive an external fuse 700, which will be described later. Furthermore, a wall section 451 is provided between the adjacent receiving sections 450. The receiving section 450 is also provided with a claw-like fastening section 452, which locks and secures the external fuse 700, preventing accidental removal of the received external fuse 700. The upper end receiving section 410 is provided with a fastening pin 413, which is connected to the fastening opening 313 of the housing section 300, and the lower end receiving section 430 is provided with a fastening pin 433, which is connected to the fastening opening 333 of the housing section 300.

[0031] Next, an external fuse 700, which can be attached to the fuse 600 of the present invention, is described with reference to Fig. 7 described. Fig. 7(a) is a perspective overview of the external backup 700, and Fig. 7(b) is a cross-sectional view along line AA.

[0032] As in Fig. As shown in Figure 7, the external fuse 700 comprises a resin housing 710 having a substantially rectangular shape, a pair of connecting terminals 720 housed within the housing 710, and a fusible section 730 between the connecting terminals 720. The housing 710 is provided with an insertion recess 740 through which the connecting terminal 720 is exposed. The female terminal-shaped connecting terminal (female connecting terminal) 720 is configured such that it can be electrically connected to the male connecting terminal 250 when the male connecting terminal 250 of the fuse 600 is inserted into the insertion recess 740, as described later. In this way, the male connecting terminal 250, the connecting terminal 720, and the fusible section 730 of the fuse 600 are electrically connected to one another.

[0033] Next, an aspect is described in which the fuse 600 of the present invention is assembled, with reference to the Fig. 8 to 10. Fig. Figure 8 is a perspective exploded view of fuse 600. Fig. 9 is a perspective overall view of the assembled fuse 600, Fig. 10(a) is a front view of fuse 600, Fig. 10(b) is a top view of fuse 600, Fig. 11(a) is a cross-sectional view along line BB of Fig. 10(b), and Fig. 11(b) is a cross-sectional view along line CC of Fig. 10(b).

[0034] Firstly, the busbar is 100, as in Fig. Figure 8 shows the busbar 100 being positioned so that it is inserted between the pair of housing sections 300 and 400 from the front and rear. Specifically, the switching unit 200 of the busbar 100 is housed in the upper end receiving section 310 of the housing section 300, the fusible link 113 of the busbar 100 is housed in the middle end receiving section 320 of the housing section 300, and the mounting opening 123 of the outer terminal 120 of the busbar 100 is housed in the lower end receiving section 330 of the housing section 300. The housing section 400 is then positioned to cover the front of the busbar 100.At this point, the switching unit 200 of the busbar 100 is housed in the upper end-facing receiving section 410 of the housing section 400, the melting section 113 of the busbar 100 is housed in the central receiving section 420 of the housing section 400, and the mounting opening 123 of the outer terminal 120 of the busbar 100 is housed in the lower end-facing receiving section 430 of the housing section 400. The mounting pin 413 of the housing section 400 extends through the mounting opening 201 and the mounting opening 202 of the busbar 100 and is connected to the mounting opening 313 of the housing section 300. Furthermore, the fastening pin 433 of the housing section 400 extends through the fastening opening 123 of the melting section 120 of the busbar 100 and is connected to the fastening opening 333 of the housing section 300.Thus, housing section 300 and housing section 400 are firmly connected and fastened together. In this way, the busbar 100 is housed inside the enclosure 500, which contains housing section 300 and housing section 400.

[0035] When the busbar 100 is housed in the housing section 300 and the housing section 400, the external fuse 700 is mounted on the busbar 100. Specifically, the external fuse 700 is pushed in until it is inserted into the mounting opening 240 of the busbar 100, and the male connecting terminal 250, which extends to the underside of the mounting opening 240, is inserted into the insertion recess 740 of the external fuse 700. The external fuse 700 is then placed in the housing 500 such that the front and back of the external fuse 700 are clamped between the opening 312 of the housing section 300 and the receiving section 450 of the housing section 400. Since the housing 500 of the fuse 600, as described above, is provided with the receiving section 450 which can accommodate the external fuse 700, the external fuse 700 can be easily attached.

[0036] Then, as in the Fig. 9 and Fig. Figure 10 shows the fuse 600 assembled and completed. The fuse 600 according to the invention is designed such that the external fuse 700 can be assembled in any configuration, but the fuse 600 itself does not necessarily contain the external fuse 700. Furthermore, in the Fig. 9 and Fig. 10. The external fuse 700 is not attached to the recording section 450 on the front to illustrate a condition in which the external fuse 700 is mounted to the fuse 600.

[0037] As in the Fig. 10 and Fig. As shown in Figure 11, the distal end of the inlet port 110 protrudes from the housing 500, and the distal end of the external melt section 120 also protrudes from the housing 500. Connection terminals for various electrical components and the like are attached to the external melt section 120. Normally, as shown in Fig. Figure 11(a) shows a current from a power source side, such as a battery connected to the input terminal 110, from the input terminal 110 to the main body 210 of the circuit unit 200 and continues to the external terminal 120 and various electrical components via the connecting section 113. If an overcurrent flows from a power source side, such as a battery connected to the input terminal 110, the melting section 113 melts, thus protecting loads of various electrical components connected to the external terminal 120.

[0038] As in Fig. As shown in Figure 11(a), a part (side wall section 220) of the circuit unit 200 is arranged in the receiving section 450 of the fuse 600, and the mounting opening 240 of the circuit unit 200 points to the opening above the receiving section 450. Below the receiving section 450, an opening section 454 is provided into which a male external terminal 910 of an external connection device 900 can be inserted, as described later.

[0039] As in Fig. As shown in Figure 11(b), in a state where the external fuse 700 is housed in the receiving section 450, the external fuse 700 is inserted into the mounting opening 240 of the circuit unit 200, and the male terminal 250 of the circuit unit 200 is inserted into and connected to the connection terminal 720 in the insertion recess 740 of the external fuse 700. The fuse 600 is used by attaching it to an external connection device 900, such as a fuse box, and a male external terminal 910 of the external connection device 900 is inserted into an insertion recess 740 of the external fuse 700 from the opening section 454 and connected to the connection terminal 720. The male external terminal 910 of the external connection device 900 is connected to various electrical components.

[0040] Normally, as in Fig. Figure 11(b) shows a current from a power source, such as a battery connected to input terminal 110, from input terminal 110 to the male terminal 250 of circuit unit 200, and further from one terminal 720 of external fuse 700, which is connected to the male terminal 250, to the other terminal 720 via the fusible link 730. The current then flows from the male terminal 910, which is connected to the other terminal 720, to various electrical components connected to the male terminal 910. If an overcurrent flows from a power source, such as a battery connected to input terminal 110, the fusible link 730 of external fuse 700 melts, thus protecting loads, such as various electrical components connected to the male terminal 910.If the load of the various electrical components connected to the male external terminal 910 changes, the fuse can be replaced by another external fuse 700 with a fuse element 730 of a different rating. Therefore, it is not necessary to change the shape of the busbar 100, and the manufacturing costs can be reduced compared to replacing the fuse element 113 of the busbar 100.

[0041] As described above, according to the present invention, the circuit unit 200 comprises the main body 210 and the side wall section 220, which are opposite each other, as well as the mounting opening 240 into which the external fuse 700 is inserted and secured, so that the height of the circuit unit 200 can be kept low. This allows for a reduction in the height of the fuse 600 even when the external fuse 700 is installed. In particular, as shown in Fig. As shown in Figure 11(b), the electrical circuit section, such as the melting section 730 and the connecting terminal 720 of the external fuse 700, is arranged such that it faces the circuit unit 200 of the fuse 600 and is arranged substantially parallel or at substantially the same height, since the external fuse 700 is inserted into and secured in the mounting opening 240. Therefore, even when the external fuse 700 is attached to the fuse 600, it is possible to prevent the external fuse 700 from popping upwards out of the fuse 600, and it is possible to reduce the overall height of the fuse 600, including the external fuse 700.

[0042] Since the main body (210), the side wall section (220) and the upper wall section (230) of the fuse (600) are formed in one piece by folding back the upper end side of the circuit unit (200), it is not necessary to provide a separate connection structure (e.g. a conventional external melting section or similar) as part for the electrical connection of the external fuse (700) and the circuit unit (200) of the fuse (600), and it is possible to reduce the number of parts, lower the manufacturing costs and improve manufacturing efficiency.

[0043] Since the side wall section 220 of the circuit unit 200 includes the male connection terminal 250 and the male connection terminal 250 is designed to be connected to the connection terminal 720 of the external fuse 700, the structure of the section that electrically connects the external fuse 700 and the circuit unit 200 of the fuse 600 is also simplified, and manufacturing costs can be reduced and manufacturing efficiency can be improved.Although the side wall section 220 of the circuit unit 200 includes the male connection terminal 250, and the male connection terminal 250 is configured to connect to the connection terminal 720 of the external fuse 700, the present invention is not limited thereto, and any other structure can be adopted as long as the external fuse 700 and the circuit unit 200 of the fuse 600 can be electrically connected. For example, a grooved female connection structure can be provided by further folding back the side wall section 220 of the circuit unit 200, a corresponding male connection can be provided in the external fuse 700, and the male connection can be electrically connected by inserting it into the female connection structure of the circuit unit 200. <Zweite Ausführungsform>

[0044] Next, in Fig. 12 a busbar 100A of a fuse 600A according to a second embodiment of the present invention. Fig. Figure 12 is a perspective overall view of the 100A busbar. The 600A fuse according to the present second embodiment differs from the one in the Fig. The fuse 600 shown in Figures 1 to 11 according to the first embodiment is only in the configuration of a 200A circuit unit of the 100A busbar, and the other configurations are the same as those of the fuse 600 according to the first embodiment. Therefore, a detailed description is omitted.

[0045] As in Fig. As shown in Figure 12, the busbar 100A is formed by stamping a flat, plate-shaped element of uniform thickness and made of a conductive metal such as copper or an alloy thereof into a predetermined shape using a stamping machine or the like, and comprises an input terminal 110A which can be supplied with a battery or the like, a melting section 113A, a plurality of external terminals 120A and a circuit unit 200A.

[0046] Furthermore, the 200A circuit unit is formed by stamping a flat, plate-shaped element of uniform thickness into a predetermined shape using a stamping machine or similar equipment at the time of manufacture of the 100A busbar. An upper end 290A of the plate-shaped 290A circuit unit extends in a straight line, and the upper end 290A becomes a plate-shaped connecting terminal 250A, which is directly connected to the external fuse 700. As in Fig. As shown in Figure 12, the upper end 290A of the circuit unit 200A is inserted into the connection terminal 720 in the insertion recess 740 of the external fuse 700 and connected to it. <Dritte Ausführungsform>

[0047] Next up is in Fig. 13 a busbar 100B of a fuse 600B according to a third embodiment of the present invention. Fig. Figure 13 is a perspective overall view of busbar 100B. The fuse 600B according to the present third embodiment differs from the fuse 600 according to the first embodiment, which is shown in the Fig. Figures 1 to 11 show only the configuration of a circuit unit 200B of the busbar 100B, and the other configurations are the same as those of the fuse 600 according to the first embodiment, and therefore a detailed description of them is omitted.

[0048] As in Fig. As shown in Figure 13, the busbar 100B is formed by stamping a flat, plate-shaped element of uniform thickness and made of a conductive metal such as copper or an alloy thereof into a predetermined shape using a stamping machine or the like, and comprises an input terminal 110B which can be supplied with a battery or the like, a melting section 113B, a plurality of external terminals 120B and a circuit unit 200B.

[0049] Furthermore, the circuit unit 200B is formed by stamping a flat, plate-shaped element of uniform thickness into a predetermined shape using a stamping machine or the like at the time of manufacture of the busbar 100B. At an upper end 290B of the plate-shaped circuit unit 200B, an upward-facing mounting opening 240B is formed by cutting out a portion of the upper end 290B. A section extending to the underside of the mounting opening 240B is a section in which the plate-shaped upper end 290B remains uncut, and this section becomes a plate-shaped male connection terminal 250B, which is connected to the external fuse 700. As in Fig. As shown in Figure 13, the external fuse 700 is inserted into the mounting opening 240B at the upper end 290A of the circuit unit 200A, and the male connection terminal 250B is inserted into and connected to the connection terminal 720 in the insertion recess 740 of the external fuse 700. As described above, the mounting opening 240B in the circuit unit 200B connects the external fuse 700 to the circuit unit 200B in a way that ensures a more stable position and orientation of the external fuse 700. <Vierte Ausführungsform>

[0050] Next up is in Fig. 14 a busbar 100C of a fuse 600C according to a fourth embodiment of the present invention. Fig. Figure 14 is a perspective overall view of busbar 100C. The fuse 600C according to the fourth embodiment differs from the one in the Fig. The fuse 600 shown in Figures 1 to 11 according to the first embodiment is only configured as a circuit unit 200C of the busbar 100C, and the other configurations are the same as those of the fuse 600 according to the first embodiment. Therefore, a detailed description is omitted.

[0051] As in Fig. As shown in Figure 14, the busbar 100C is formed by stamping a flat, plate-shaped element of uniform thickness and made of a conductive metal such as copper or an alloy thereof into a predetermined shape using a stamping machine or the like, and comprises an input terminal 110C which can be supplied with a battery or the like, a melting section 113C, a plurality of external terminals 120C and a circuit unit 200C.

[0052] Furthermore, the circuit unit 200C is formed by stamping a flat, plate-shaped element of uniform thickness into a predetermined shape using a stamping machine or the like, and by stepwise bending the plate-shaped element vertically to form a bending section 280C at the time of manufacture of the busbar 100C. An upper end 290C of the circuit unit 200C extends in a straight line, and the plate-shaped upper end 290C becomes a plate-shaped connecting terminal 250C, which is connected to the external fuse 700. As in Fig. As shown in Figure 14, the upper end 290C of the circuit unit 200C is inserted into the connection terminal 720 in the insertion recess 740 of the external fuse 700 and connected to it. Since the circuit unit 200C also has the stepped bending section 280C, the stiffness of the circuit unit 200C is improved and its height is reduced, which contributes to the reduction in the height of the fuse 600C.

[0053] Since the external fuse 700 is attached directly to the circuit unit 200C, as described above, its position can be easily and flexibly changed by modifying the design of the circuit unit 200C. For example, if the circuit unit 200A has a flat, plate-like design, the external fuse 700 is arranged linearly above and below the melting section 120A, as shown in Fig. Figure 12 shows that when the circuit unit 200C is designed to include the bending section 280C, the height of the circuit unit 200C is reduced, and the position of the external fuse 700 is also reduced, which contributes to the height reduction, as shown in Fig. 14 shown. If the circuit unit 200, as in Fig. As shown in Figure 1, which is essentially U-shaped and comprises the main body 210 and the side wall section 220 facing each other, the height of the circuit unit 200 is further reduced and the arrangement position of the external fuse 700 is further reduced, which contributes to the height reduction.

[0054] A 240B mounting opening, as in Fig.As shown in Figure 13, a terminal 290C can be provided at the upper end of the circuit unit 200C. Furthermore, the circuit unit 200C includes the male connection terminal 250C, and the male connection terminal 250C is configured to be connected to the connection terminal 720 of the external fuse 700, but the present invention is not limited to this. Any other configuration can be adopted as long as the external fuse 700 and the circuit unit 200C of the fuse 600C can be electrically connected. For example, a grooved female connection structure can be provided by bending the upper end 290C of the circuit unit 200C, a corresponding male connection can be provided in the external fuse 700, and the male connection can be inserted into the female connection structure of the circuit unit 200C to be electrically connected.

[0055] The safeguarding and the method for producing the safeguarding of the present invention are not limited to the above embodiments, and various modifications and combinations can be made within the scope of the claims and the scope of the embodiments, and these modifications and combinations are also included within the scope of the law. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2018-010768

[0004]

Claims

[1] Comprehensive security: a busbar with an input terminal, an external terminal, a switching unit, and a fusible link provided between the input terminal and the external terminal; and a housing that covers at least part of the busbar, whereby The circuit unit is designed to allow the attachment of an external fuse with a melting section and a connection terminal. [2] Fuse according to claim 1, wherein a mounting opening is formed in a part of the circuit unit to which the external fuse can be attached. [3] Fuse according to claim 1 or 2, wherein the circuit unit has a main body and a side wall section opposite each other. [4] Security according to claim 3, wherein the main body and the side wall section are formed by folding back an upper end side of the circuit unit. [5] Security according to claim 3, wherein the lateral wall section has a plate-shaped male connection extending from the mounting opening, and The male connection terminal is designed so that it can be connected to a female connection terminal of the external fuse. [6] Fuse according to claim 1 or 2, wherein the housing is provided with a receiving section that can receive the external fuse. [7] Methods for creating a safety device: a busbar with an input terminal, an external terminal, a switching unit, and a fusible link provided between the input terminal and the external terminal; and a housing that covers at least part of the busbar, the method comprising the following: Folding back an upper end face of the circuit unit to form a main body and a side wall section opposite each other, and an upper wall section connecting the main body and the side wall section; and Cutting out part of the circuit unit to form an open mounting opening, wherein The mounting opening is designed to allow the attachment of an external fuse with a melting section and a connection port.

Images