Spring member, fuse, and fuse system
The spring member with laminated conductive and spring portions addresses the issue of ensuring stable electrical conductivity and prevents reconnection of contacts after fusing, ensuring stable electrical conductivity and preventing ignition risks while maintaining a compact device.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NHK SPRING CO LTD
- Filing Date
- 2025-12-10
- Publication Date
- 2026-06-18
Smart Images
Figure JP2025043052_18062026_PF_FP_ABST
Abstract
Description
Spring member, fuse, and fuse system 【0001】 The present invention relates to a spring member, a fuse, and a fuse system. 【0002】 Conventionally, in an electric circuit, in order to protect the electric circuit and prevent ignition or the like, a fuse that melts and cuts off the power supply when a current exceeding the rated value flows is used (for example, see Patent Document 1). In Patent Document 1, a conductive spring and a terminal that form part of an electric circuit are melt-bonded with a low-melting-point conductor, and the low-melting-point conductor is melted by heat generated when a current exceeding the rated value (overcurrent) flows, thereby electrically cutting off the conductive spring and the terminal. 【0003】 Japanese Patent Publication No. 7-114101 【0004】 By the way, in an electric circuit, vibrations, aging deterioration, and distortion due to temperature changes may occur, and gaps may occur with respect to the contact target. There was a risk that electrical continuity could not be ensured due to the occurrence of gaps. 【0005】 The present invention has been made in view of the above, and an object thereof is to provide a spring member, a fuse, and a fuse system that can ensure stable electrical continuity and can be melted when an overcurrent flows. 【0006】 In order to solve the above-described problems and achieve the object, the spring member according to the present invention includes a conductive portion having conductivity, and a spring portion having higher rigidity than the conductive portion, and a part of the conductive portion is laminated in a first direction. The conductive portion includes a first conductive portion extending in a second direction orthogonal to the first direction, a second conductive portion extending in the second direction and arranged side by side in a third direction orthogonal to the first and second directions with respect to the first conductive portion, and a connection portion connecting the first and second conductive portions. The spring portion includes a first spring portion where the first conductive portion is laminated, and a second spring portion where the second conductive portion is laminated. The first and second spring portions are each curved or bent in the first direction at the central portion in the second direction. The first conductive portion extends along the first spring portion, and the second conductive portion extends along the second spring portion. 【0007】Furthermore, the spring member according to the present invention is characterized in that, in the above invention, the first conductive portion and the first spring portion intersect each other at both ends in the second direction, and the second conductive portion and the second spring portion intersect each other at both ends in the second direction. 【0008】 Furthermore, the spring member according to the present invention is characterized in that the spring portion further comprises a tension-adding portion that protrudes from the first spring portion toward the second spring portion and supports a part of the connecting portion to add tension. 【0009】 Furthermore, the spring member according to the present invention is characterized in that the tension-applying portion extends upward in the first direction. 【0010】 Furthermore, the spring member according to the present invention is characterized in that the tension-applying portion extends along the third direction. 【0011】 Furthermore, the fuse according to the present invention comprises a spring member according to the above invention, a frame body housing the spring member, and a terminal inserted into and fixed to the frame body and in contact with a part of the spring portion, wherein the frame body has an opening in the side wall on one end side of the frame body in the second direction, forming a hole that creates a space within the frame body, and the hole is formed such that a part of the conductive portion is exposed to the space, and the terminal is in contact with the part of the conductive portion exposed to the space. 【0012】 Furthermore, the fuse according to the present invention is characterized in that, in the above invention, the hole exposes the central portion of the conductive part in the second direction into the space. 【0013】 Furthermore, the fuse according to the present invention is characterized in that, in the above invention, the hole portion exposes both ends of the conductive portion in the second direction into the space. 【0014】Furthermore, the fuse according to the present invention is characterized in that the hole portion has a first hole portion that forms a space for exposing the central portion of the conductive portion in the second direction, and a second hole portion that forms a space for exposing both ends of the conductive portion in the second direction, and a terminal other than the terminal is inserted into at least one of the first and second holes. 【0015】 Furthermore, the fuse according to the present invention is a fuse into which a terminal can be inserted, comprising a spring member according to the above invention and a frame body housing the spring member, wherein the frame body has at least one of the following: a first hole having an opening in the side wall of one end of the frame body in the second direction, which forms a space that exposes the central part of the conductive part in the second direction, and a second hole having an opening that forms a space that exposes both ends of the conductive part in the second direction, and when the terminal is inserted into the frame body, the terminal contacts a part of the conductive part that is exposed in the space. 【0016】 Furthermore, the fuse system according to the present invention is a fuse system in which a plurality of fuses, each comprising a spring member according to the above invention, a frame for housing the spring member, and a terminal that contacts a part of the spring portion, are connected in the second direction, wherein the frame of each fuse in the plurality of fuses has a plurality of holes formed to create a space for exposing a part of the conductive portion, and in each fuse, the terminal of the fuse is pre-inserted and fixed in a hole having an opening in one of the side walls at either end in the second direction, so as to contact a part of the conductive portion exposed in the space, and in adjacent fuses in the plurality of fuses, the terminal of another fuse can be inserted into a hole having an opening in the other side wall at either end in the second direction, and when the terminal of the other fuse is inserted into the frame of the first fuse, the terminal of the other fuse contacts a part of the conductive portion exposed in the space of the first fuse. 【0017】Furthermore, the fuse system according to the present invention is characterized in that, in the above invention, a hole having an opening in the side wall of either one of the two ends in the second direction is formed of either a first hole that forms a space for exposing the central part of the conductive part in the second direction, or a second hole that forms a space for exposing both ends of the conductive part in the second direction, and a hole having an opening in the other side wall of either one of the two ends in the second direction is formed of either a first hole that forms a space for exposing the central part of the conductive part in the second direction, or a second hole that forms a space for exposing both ends of the conductive part in the second direction. 【0018】 Furthermore, in the fuse system according to the present invention, the first fuse and the other fuse are connected in the second direction in the same orientation around the axis of the second direction. 【0019】 Furthermore, the fuse system according to the present invention is characterized in that, in the above invention, the first fuse and the other fuse are connected in the second direction in a direction rotated 180° around the axis of the second direction. 【0020】 According to the present invention, stable electrical conductivity is ensured, and the device can be melted when an overcurrent flows. 【0021】Figure 1 is a perspective view showing a spring member according to Embodiment 1 of the present invention. Figure 2 is a plan view showing the configuration of the spring member as seen from the direction of arrow A shown in Figure 1. Figure 3 is a plan view (part 1) showing the state of use of the spring member according to Embodiment 1 of the present invention. Figure 4 is a plan view (part 2) showing the state of use of the spring member according to Embodiment 1 of the present invention. Figure 5 is a perspective view showing a spring member according to Embodiment 2 of the present invention. Figure 6 is a plan view showing the configuration of the spring member as seen from the direction of arrow B shown in Figure 5. Figure 7 is a plan view (part 1) showing the state of use of the spring member according to Embodiment 2 of the present invention. Figure 8 is a plan view (part 2) showing the state of use of the spring member according to Embodiment 2 of the present invention. Figure 9 is a perspective view showing a spring member according to Embodiment 3 of the present invention. Figure 10 is a plan view showing the configuration of the spring member as seen from the direction of arrow C shown in Figure 9. Figure 11 is a plan view (part 1) showing the state of use of the spring member according to Embodiment 3 of the present invention. Figure 12 is a plan view (part 2) showing the state of use of the spring member according to Embodiment 3 of the present invention. Figure 13 is a perspective view showing the configuration of a fuse according to Embodiment 4 of the present invention. Figure 14 is a perspective view showing the configuration of a fuse according to Embodiment 5 of the present invention. Figure 15 is a perspective view for explaining the configuration of a fuse according to Embodiment 6 of the present invention. Figure 16 is a perspective view showing an example of how to use a fuse according to Embodiment 6 of the present invention. Figure 17 is a perspective view showing the configuration of a fuse according to Embodiment 7 of the present invention. Figure 18 is a perspective view for explaining an example of how to use a fuse according to Embodiment 7 of the present invention. 【0022】 In the following description, a spring member, a fuse, and a fuse system will be described as embodiments for carrying out the present invention (hereinafter referred to as "embodiments"). Furthermore, the present invention is not limited to these embodiments. In addition, the same parts are denoted by the same reference numerals in the drawings. Furthermore, it should be noted that the drawings are schematic, and the relationship between the thickness and width of each member, the ratio of each member, etc., may differ from reality. Also, there are parts in the drawings that differ from each other in terms of dimensions and ratios. 【0023】(Embodiment 1) Figure 1 is a perspective view showing a spring member according to Embodiment 1 of the present invention. Figure 2 is a plan view showing the configuration of the spring member as seen from the direction A indicated by the arrow in Figure 1. The spring member 1 according to this embodiment comprises a conductive part 2 and a spring part 3. In the following drawings, one of the three mutually orthogonal directions is the X direction (second direction), the direction orthogonal to the X direction is the Y direction (third direction), and the direction orthogonal to both the X and Y directions is the Z direction (first direction). A part of the conductive part 2 and the spring part 3 are stacked in the Z direction. 【0024】 The conductive part 2 is made of a material with higher electrical conductivity than the material forming the spring part 3. The conductive part 2 is made of, for example, stainless steel, copper, copper alloy, Inconel, etc. Inconel has superior heat resistance (creep) compared to the other materials mentioned above and is suitable for maintaining elasticity when used in high-temperature environments. The conductive part 2 is preferably in the form of a plate that can independently maintain its shape. 【0025】 The spring portion 3 is made of a material with a higher Young's modulus than the material forming the conductive portion 2. The spring portion 3 is made of, for example, copper (including pure copper), copper alloy, aluminum, aluminum alloy, stainless steel, etc. 【0026】 Thus, in the spring member 1, the conductive part 2 has superior electrical conductivity compared to the spring part 3, and the spring part 3 has higher rigidity compared to the conductive part 2. In other words, in the spring member 1, the conductive part 2 functions as a conductive spring, and the spring part 3 functions as a load spring. 【0027】 The conductive part 2 comprises a first conductive part 21, a second conductive part 22, and a connecting part 23 that connects the first conductive part 21 and the second conductive part 22. 【0028】The first conductive portion 21 and the second conductive portion 22 are each curved or bent at their central portions in the X direction. Hereinafter, in the components of the spring member 1, the side moving away from the central portion in the X direction toward the end is referred to as the outer side, and the side moving away from the end toward the central portion is referred to as the inner side. Due to this curvature, the first conductive portion 21 and the second conductive portion 22 each have a convex shape that protrudes from one side toward the other in the Z direction. In other words, the conductive portion 2 and the spring portion 3 are each curved around an axis extending in the Y direction. The first conductive portion 21 and the second conductive portion 22 may each be bent to, for example, become pointed. Furthermore, in this embodiment 1, an example is described in which the first conductive portion 21 and the second conductive portion 22 each extend with a uniform width, but they may also have different widths in some parts, for example, so that the size in the Y direction decreases as they move outward in the X direction. 【0029】 Specifically, the first conductive portion 21 has a central portion 211 located in the center in the X direction, a first end portion 212 extending in the X direction from one end of the central portion 211 in the X direction, and a second end portion 213 extending from the other end of the central portion 211 in the X direction to the side opposite to the first end portion 212. The second conductive portion 22 has a central portion 221 located in the center in the X direction, a first end portion 222 extending in the X direction from one end of the central portion 221 in the X direction, and a second end portion 223 extending from the other end of the central portion 221 in the X direction to the side opposite to the first end portion 222. 【0030】 The connecting portion 23 connects the central portion 211 of the first conductive portion 21 and the central portion 221 of the second conductive portion 22. In a natural state where no load other than gravity is applied, the connecting portion 23 extends linearly in the Y direction. In this embodiment 1, the connecting portion 23 connects the first conductive portion 21 and the second conductive portion 22 so that they are at the same position (height) in the Z direction. In the plan view shown in Figure 2, the portion where the connecting portion 23 and the central portions 211 and 221 are connected is shown to be flat, but the connecting portion may be curved. For example, the connecting portion may be curved in an arc in the X direction, and the portions of the central portions 2111 and 221 that connect to the connecting portion 23 may be curved to match the connecting portion 23. 【0031】The spring portion 3 comprises a first spring portion 31 and a second spring portion 32. 【0032】 The first spring portion 31 and the second spring portion 32 each have a curved or bent middle portion in the X direction. Specifically, the first spring portion 31 has a central portion 311 located in the center in the X direction, a first end portion 312 extending in the X direction from one end of the central portion 311 in the X direction, and a second end portion 313 extending from the other end of the central portion 311 in the X direction to the side opposite to the first end portion 312. The second spring portion 32 has a central portion 321 located in the center in the X direction, a first end portion 322 extending in the X direction from one end of the central portion 321 in the X direction, and a second end portion 323 extending from the other end of the central portion 321 in the X direction to the side opposite to the first end portion 322. 【0033】 Furthermore, the first spring portion 31 has an opening 31a at its first end 312 and an opening 31b at its second end 313. Similarly, the second spring portion 32 has an opening 32a at its first end 322 and an opening 32b at its second end 323. The openings 31a, 31b and 32a, 32b each penetrate in the Z direction. Note that the openings 31a, 31b, 32a, 32b may be, for example, slits extending in the Y direction. 【0034】 Furthermore, the first conductive portion 21, the second conductive portion 22, the first spring portion 31, and the second spring portion 32 each pass through the center in the X direction when viewed from the Z direction and exhibit a shape symmetrical with respect to a plane parallel to the YZ plane. 【0035】 The first end portion 212 and the second end portion 213 are independently and movably locked to the openings 31a and 31b of the first spring portion 31. In other words, the openings 31a and 31b are located on both sides of the first conductive portion 21, outside of the central portion in the X direction. Thus, each end of the first conductive portion 21 in the X direction penetrates the openings 31a and 31b, respectively, from one side in the Z direction to the other, as it moves from the inside to the outside in the X direction. For this reason, the first conductive portion 21 extends along the first spring portion 31 and intersects the spring portion 3 in the Z direction. 【0036】Similarly, the first end portion 222 and the second end portion 223 are independently movably locked to the openings 32a and 32b of the second spring portion 32. In other words, the openings 32a and 32b are located on both sides of the second conductive portion 22 that are outside the center in the X direction relative to the center in the X direction. Thus, each end of the second conductive portion 22 in the X direction penetrates the openings 32a and 32b, respectively, from one side in the Z direction to the other, as it moves from the inside to the outside in the X direction. For this reason, the second conductive portion 22 extends along the second spring portion 32 and intersects the spring portion 3 in the Z direction. 【0037】 Therefore, in the spring member 1, the vertical relationship in the Z direction of the first conductive part 21 and the first spring part 31, and the second conductive part and the second spring part 32, is reversed at the center in the X direction and at both ends. For example, in the first conductive part 21 and the first spring part 31, the first conductive part 21 is positioned above at the center in the X direction, and the first spring part 31 is positioned above at both ends. In this case, the first conductive part 21 and the first spring part 31, and the second conductive part 22 and the second spring part 32 are in contact with each other in a non-joined state. However, they may be joined to each other. 【0038】 When the conductive part 2 is assembled to the spring part 3, the first conductive part 21 and the second conductive part 22 are elastically deformed, and both ends of each are pressed against the first spring part 31 or the second spring part 32 in the Z direction. Before the conductive part 2 and the spring part 3 are assembled to each other, the magnitudes of the first spring part 31 and the second spring part 32 in the Z direction are greater than the magnitudes of the first conductive part 21 and the second conductive part 22 in the Z direction. 【0039】 Next, the arrangement of the spring member 1 in the electrical circuit will be described with reference to Figures 3 and 4. Figures 3 and 4 are plan views showing the state of use of the spring member according to Embodiment 1 of the present invention. The spring member 1 is provided, for example, inside a frame (case), and applies pressure to both opposing wall surfaces of the frame by elastic force. That is, the spring member 1 functions as a structure that presses two opposing objects to be pressed so that they are separated from each other. 【0040】The spring member 1 is disposed between one member 101 which forms the upper wall of the frame and the other member 102 which forms the lower wall opposite the upper wall, and pressure is applied to both members 101 and 102 so that they are separated. For example, in the vertical direction of the paper, the two members are arranged so as to sandwich the spring member 1. In this case, terminals 103 and 104 are formed on member 102, and the first end 212 and second end 213 of the first conductive part 21 are in contact with terminal 103, and the first end 222 and second end 223 of the second conductive part 22 are in contact with terminal 104. In addition, since the first conductive part 21 and the second conductive part 22 are connected by a connecting part 23, terminals 103 and 104 are electrically connected by the conductive part 2. 【0041】 In the spring member 1, the conductive portion 2 contacts the terminals 103 and 104, electrically conducting electricity between them, while the spring portion 3 presses against members 101 and 102, stabilizing the contact state of the conductive portion 2 with the terminals 103 and 104. 【0042】 Here, when an overcurrent flows through the terminal, the spring member 1 functions as a fuse, cutting off the current to the conductive part 2 by melting the connection portion 23 (see Figure 4). At this time, each severed piece of the melted connection portion 23 deforms, for example, by bending and separating from each other. 【0043】 In the above-described embodiment 1, the conductive part 2, which electrically conducts between terminals and melts when an overcurrent flows, and the spring part 3, which applies a load to press the conductive part 2 against the object to be pressed, are configured as separate components. As a result, the spring part 3 stabilizes the contact of the conductive part 2 with the terminals against vibration and strain, ensuring stable electrical conduction by the conductive part 2, and allowing it to melt when an overcurrent flows. 【0044】Incidentally, in the conventional spring members shown in Patent Document 1 and the like, in an electric circuit, depending on the usage state, there is a case where the contacts are reconnected due to vibrations generated after fusing. For example, after fusing, if the spring contacts the terminal due to vibration, there is a risk of ignition when current is applied. In order to suppress reconnection after fusing, if an attempt is made to separate the spring after fusing from the terminal, it is necessary to form a space in the fuse for the spring piece after fusing to escape, and there is a problem that the device configuration of the fuse becomes larger. On the other hand, in Embodiment 1, the connection portions 23 after fusing are separated from each other, and the displacement of the conductive portion 2 due to vibration is suppressed by the spring portion 3. Therefore, the fuse pieces do not contact each other again, and ignition due to reconnection after fusing is suppressed. While suppressing an increase in size, reconnection after fusing can be suppressed. 【0045】 (Embodiment 2) Next, Embodiment 2 will be described with reference to FIGS. 5 to 8. FIG. 5 is a perspective view showing a spring member according to Embodiment 2 of the present invention. FIG. 6 is a plan view showing the configuration of the spring member as viewed from the direction of arrow B shown in FIG. 5. Hereinafter, the same components as those in Embodiment 1 are denoted by the same reference numerals, and the description thereof is omitted. 【0046】 The spring member 1A according to Embodiment 2 includes a conductive portion 2 and a spring portion 3A. 【0047】 The spring portion 3A is formed of a material having a higher Young's modulus than the material forming the conductive portion 2, similarly to the spring portion 3. The spring portion 3A includes a first spring portion 31, a second spring portion 32, and a tension adding portion 33. 【0048】 The tension adding portion 33 stands up and protrudes in the Z direction from the central portion 311 of the first spring portion 31 toward the second spring portion 32. At this time, the tension adding portion 33 is not in contact with the second spring portion 32. Further, the tension adding portion 33 supports the connection portion 23. For this reason, the connection portion 23 stands up in the Z direction along the tension adding portion 33 (see FIG. 6). Thereby, in the natural state where the conductive portion 2 is assembled to the spring portion 3, in the spring member 1A, the height in the Z direction is higher in the second conductive portion 22 and the second spring portion 32 than in the first conductive portion 21 and the first spring portion 31. 【0049】Next, the arrangement of the spring member 1 in the electrical circuit will be described with reference to Figures 7 and 8. The spring member 1A is provided, for example, inside the frame and applies pressure to both opposing wall surfaces of the frame by elastic force. 【0050】 Figures 7 and 8 are plan views showing the usage state of a spring member according to Embodiment 2 of the present invention. The spring member 1A is disposed between one member 101A and the other member 102 of the frame, and pressure is applied to both members 101A and 102 so that they are separated. A recess 101a is formed in the surface of member 101A that contacts the spring member 1A, in the portion where the connecting portion 23 is located. This recess 101a functions as a "relief portion" into which the cut pieces of the melted connecting portion 23 enter. 【0051】 In the spring member 1A, in the state shown in Figure 6 before assembly, the height in the Z direction was such that the second conductive part 22 and the second spring part 32 were located above the first conductive part 21 and the first spring part 31. On the other hand, in the state shown in Figure 7, the load from members 101A and 102 due to assembly applies a load from above, particularly to the second conductive part 22 and the second spring part 32, so that the height in the Z direction is the same on both sides of the connecting part 23. In this state, tension is applied to the connecting part 23 towards member 101A (upper side in the Z direction) by the tension application part 33. 【0052】 If an overcurrent flows through the terminal, the connection portion 23 melts (see Figure 8). At this time, of the severed pieces of the melted connection portion 23, the pieces supported by the tension-applying portion 33 are lifted towards the recess 101a by the tension-applying portion 33 and enter the recess 101a. 【0053】 In the above-described embodiment 2, similar to embodiment 1, the conductive part 2 that electrically conducts between terminals and melts when an overcurrent flows, and the spring part 3 that applies a load to press the conductive part 2 against the object to be pressed are configured as separate components. This ensures stable electrical conductivity and allows for melting when an overcurrent flows. 【0054】Furthermore, according to Embodiment 2, when the connecting portion 23 is melted, the tension-applying portion 33 lifts one of the cut pieces towards the recess 101a, thereby more reliably suppressing contact between the cut pieces after melting. 【0055】 (Embodiment 3) Next, Embodiment 3 will be described with reference to Figures 9 to 12. Figure 9 is a perspective view showing a spring member according to Embodiment 3 of the present invention. Figure 10 is a plan view showing the configuration of the spring member as seen from the direction of arrow C shown in Figure 9. Hereinafter, the same reference numerals will be used for the same components as in Embodiment 1, and their descriptions will be omitted. 【0056】 The spring member 1B according to this third embodiment comprises a conductive portion 2 and a spring portion 3B. 【0057】 The spring portion 3B, like the spring portion 3, is made of a material with a higher Young's modulus than the material forming the conductive portion 2. The spring portion 3B comprises a first spring portion 31, a second spring portion 32, and a tension-applying portion 34. 【0058】 The tension-applying portion 34 protrudes in the Y direction from the central portion 311 of the first spring portion 31 toward the second spring portion 32 (see Figure 10). In this case, the tension-applying portion 34 is not in contact with the second spring portion 32. The tension-applying portion 34 also supports the connecting portion 23. For this reason, the connecting portion 23 extends in the Y direction along the tension-applying portion 34. As a result, in the natural state in which the conductive portion 2 is assembled to the spring portion 3, the height in the Z direction of the first conductive portion 21 and the first spring portion 31 and the second conductive portion 22 and the second spring portion 32 are the same. 【0059】 Next, the arrangement of the spring member 1 in the electrical circuit will be described with reference to Figures 11 and 12. The spring member 1B is provided, for example, inside the frame and applies pressure to both opposing wall surfaces of the frame by elastic force. 【0060】Figures 11 and 12 are plan views showing the usage state of a spring member according to Embodiment 3 of the present invention. The spring member 1B is disposed between one member 101B and the other member 102 of the frame, and pressure is applied to both members 101B and 102 so that they are separated. A protrusion 105 is formed on the surface of member 101B that is in contact with the spring member 1B and where the second conductive portion 22 is located. The step formed by the rise of this protrusion 105 creates a relief portion 101b into which the cut piece of the melted connection portion 23 enters. 【0061】 In spring member 1B, the heights in the Z direction of the first conductive portion 21 and the first spring portion 31 and the second conductive portion 22 and the second spring portion 32 were aligned in the state shown in Figure 10 before assembly. However, in the state shown in Figure 11, the heights are misaligned due to the protrusion 105 of member 101B. Specifically, the height in the Z direction of the central portion 221 of the second conductive portion 22 is lower than the height in the Z direction of the central portion 211 of the first conductive portion 21. In this state, tension is applied to the connecting portion 23 towards member 101B (upward in the Z direction) by the tension application portion 34. 【0062】 If an overcurrent flows through the terminal, the connection portion 23 melts. The melting of the connection portion 23 causes the tension-applying portion 34 to rise towards the relief portion 101b (see Figure 12). At this time, of the severed pieces of the connection portion 23, the pieces supported by the tension-applying portion 34 rise up in the Y direction due to the tension-applying portion 34 and enter the recess 101a. On the other hand, the pieces of the connection portion 23 that are not supported by the tension-applying portion 34 hang down, for example, due to gravity. 【0063】 In the above-described embodiment 3, similar to embodiment 1, the conductive part 2 that electrically conducts between terminals and melts when an overcurrent flows, and the spring part 3B that applies a load to press the conductive part 2 against the object to be pressed are configured as separate components. This ensures stable electrical conduction and allows for melting when an overcurrent flows. 【0064】Furthermore, according to Embodiment 3, when the connecting portion 23 is melted, the tension-applying portion 34 lifts one of the cut pieces towards the relief portion 101b, thereby more reliably suppressing contact between the cut pieces after melting. 【0065】 (Embodiment 4) Next, Embodiment 4 will be described with reference to Figure 13. Figure 13 is a perspective view showing the configuration of a fuse according to Embodiment 4 of the present invention. Hereinafter, the same reference numerals will be used for the same components as in Embodiment 1, etc., and their descriptions will be omitted. 【0066】 The fuse 10 according to this fourth embodiment comprises a spring member 1A, a frame 200, and terminals 203 and 204. 【0067】 In the fuse 10, the frame body 200 is formed by the overlapping of the first frame portion 201 and the second frame portion 202. The spring member 1A is housed inside the frame body. The frame body 200 also has holes 2011, 2012, 2021, and 2022 into which terminals 203 and 204 can be inserted. The holes 2011, 2012 and the holes 2021, 2022 each form a space extending in the X direction. The holes 2021 and 2022 have openings in the side wall on one end of the frame body 200 in the X direction. The holes 2011 and 2013 have openings in the side wall on the other end of the frame body 200 in the X direction. The holes 2011 and 2012 are first holes that expose the central portions 211 and 221, respectively, into the space formed by these holes. The holes 2021 and 2022 are second holes that expose the first end portion 212 and the second end portion 213, and the first end portion 222 and the second end portion 223, respectively, into the space formed by the first holes. 【0068】 In the fuse 10 shown in Figure 13, terminals 203 and 204 are pre-inserted and fixed in holes 2021 and 2022. Inside the frame 200, terminal 203 contacts the first end 212 and second end 213 of the first conductive portion 21, and terminal 204 contacts the first end 222 and second end 223 of the second conductive portion 22. Furthermore, a recess 201a is formed in the first frame 201, which is a relief portion for the cut piece of the connecting portion 23. 【0069】The fuse 10 can be used by inserting other terminals into the holes 2011 and 2012. Alternatively, the fuse may be configured without holes 2011 and 2012, or holes 2021 and 2022. For example, it can be configured without holes into which terminals are not inserted. 【0070】 (Embodiment 5) Next, Embodiment 5 will be described with reference to Figure 14. Figure 14 is a perspective view showing the configuration of a fuse according to Embodiment 5 of the present invention. Hereinafter, the same reference numerals will be used for the same components as in Embodiment 1 and the like, and their descriptions will be omitted. 【0071】 The fuse 10A according to this fifth embodiment comprises a spring member 1A and a frame 200A. 【0072】 In fuse 10A, a frame body 200A is formed by the overlapping of a first frame portion 201A and a second frame portion 202A. A spring member 1A is housed inside the frame body. The frame body 200A also has holes 2013, 2014, 2023, and 2024 into which terminals can be inserted. The holes 2013, 2014 and the holes 2023, 2024 each form a space extending in the X direction and have openings on one end of the frame body 200A in the X direction (on the same side to each other). The holes 2013 and 2014 are first holes that expose the central portions 211 and 221, respectively, in the space they form. The holes 2023 and 2024 are second holes that expose the first end portion 212 and the second end portion 213, and the first end portion 222 and the second end portion 223, respectively, into the space formed by the said holes. 【0073】In the fuse 10A shown in Figure 14, when a terminal is inserted into the hole 2013, the terminal contacts the central portion 211 of the first conductive portion 21 inside the frame 200A. Similarly, when a terminal is inserted into the hole 2014, the terminal contacts the central portion 221 of the second conductive portion 22 inside the frame 200A. Furthermore, when a terminal is inserted into the hole 2023, the terminal contacts the first end portion 212 and the second end portion 213 of the first conductive portion 21 inside the frame 200A. Similarly, when a terminal is inserted into the hole 2024, the terminal contacts the first end portion 222 and the second end portion 223 of the second conductive portion 22 inside the frame 200A. In addition, the first frame portion 201A has a recess 201a which is a relief portion for the cut piece of the connecting portion 23. In the example of fuse 10A where holes 2013, 2014, 2023, and 2024 are formed, a configuration in which at least one of holes 2013, 2014 and holes 2023, 2024 is formed is also possible. 【0074】 (Embodiment 6) Next, Embodiment 6 will be described with reference to Figures 15 and 16. Figure 15 is a perspective view illustrating the configuration of the fuse according to Embodiment 6 of the present invention. Hereinafter, the same reference numerals will be used for the same components as in Embodiment 1 and the like, and their descriptions will be omitted. 【0075】 In this embodiment 6, the fuse system 300 is formed by connecting the two fuses 10 shown in Figure 13. Hereinafter, one fuse 10 will be referred to as the first fuse 10a, and the other fuse 10 as the second fuse 10b. In this embodiment 6, an example in which two fuses 10 adjacent to each other in the X direction are connected is described, but a configuration in which three or more fuses 10 are connected is also possible. In this case, one of the fuses connected to each other becomes one fuse, and the other becomes another fuse. The first fuse 10a and the second fuse 10b each have openings in the side walls at both ends in the X direction of the frame 200, and a plurality of holes (2021, 2011), (2022, 2012) are formed to create a space that exposes a part of the conductive part 2. 【0076】As shown in Figure 15, the first fuse 10a is connected to the second fuse 10b in a state where it is rotated 180° around an axis that passes through the center of gravity and is parallel to the X direction. At this time, the terminal 203 extending from the second frame portion 202 of the first fuse 10a is inserted into the hole portion 2012 of the second fuse 10b (see Figure 16). The terminal 203 inserted into the first frame portion 201 contacts the central portion 221 of the second conductive portion 22 that is exposed in the space formed by the hole portion 2012 of the second fuse 10b. In addition, the terminal 204 extending from the second frame portion 202 of the first fuse 10a is inserted into the hole portion 2011 of the second fuse 10b. The terminal 203 inserted into the first frame portion 201 contacts the central portion 221 of the second conductive portion 22 which is exposed in the space formed by the hole portion 2011 of the second fuse 10b. 【0077】 By connecting the fuses, the terminals of one fuse come into contact with the conductive part of the other fuse, ensuring electrical conductivity between the fuses. This allows the system to be used as a fuse system 300 with multiple fuses connected together. In this embodiment 6, a parallel fuse system 300 is formed. 【0078】 According to Embodiment 6, the same effects as in Embodiment 2 can be obtained for a single fuse. Furthermore, according to Embodiment 6, by forming a system in which multiple fuses are linked together, if a fuse blows due to an overcurrent, it is possible to restore the system in the event of a blown fuse by replacing that fuse. On the other hand, by leaving the blown fuse in place and adding a new fuse, the resistance of the fuse system can be kept the same and reused. 【0079】 Furthermore, according to this embodiment 6, by forming a parallel fuse system, it becomes possible to handle overcurrents with large settings. However, as the cross-sectional area increases, reconnection and resistance variations become greater. Therefore, compared to a configuration consisting of a single high-capacity fuse, it is possible to ensure that at least one of the fuses blows at the set current, thereby improving the reliability of the fuses. 【0080】(Embodiment 7) Next, Embodiment 7 will be described with reference to Figures 17 and 18. Figure 17 is a perspective view illustrating the configuration of the fuse according to Embodiment 7 of the present invention. Hereinafter, the same reference numerals will be used for the same components as in Embodiment 1 and the like, and their descriptions will be omitted. 【0081】 In this embodiment 7, two fuses 10B are connected using the fuse 10B shown in Figure 17 to form a unit (fuse system). Hereinafter, one fuse 10B will be referred to as the first fuse 10B1, and the other fuse 10B as the second fuse 10B2. 【0082】 The fuse 10B according to this embodiment 7 comprises a spring member 1A, a frame 200B, and a terminal 203. In the fuse 10B, the frame 200B is formed by the overlapping of a first frame portion 201B and a second frame portion 202B. The spring member 1A is housed within the frame 200B. 【0083】 Furthermore, the frame 200B of the fuse 10B has holes 2012 and 2021 into which terminals can be inserted. In other words, the fuse 10B has a configuration in which the frame 200 described above does not have holes 2011 and 2022. Also, a terminal 203 is inserted into hole 2021. 【0084】 As shown in Figure 18, the first fuse 10B1 is connected to the second fuse 10B2 in a state where it is rotated 180° around an axis that passes through the center of gravity and is parallel to the X direction, thereby forming a fuse system 300A. At this time, the terminal 203 extending from the second frame portion 202 of the first fuse 10B1 is inserted into the hole portion 2012 of the second fuse 10B2. The terminal 203 inserted into the first frame portion 201 contacts the central portion 221 of the second conductive portion 22 of the second fuse 10B2. In this embodiment 7, an example in which two fuses 10B1 and 10B2 are connected is described, but a configuration in which three or more fuses 10B are connected is also possible. 【0085】By connecting fuses, the terminals of one fuse come into contact with the conductive part of the other fuse, ensuring electrical conductivity between the fuses. This allows them to be used as a fuse unit with multiple fuses connected together. In this embodiment 7, a series fuse system 300A is formed. 【0086】 According to this embodiment 7, the same effects as in embodiment 2 can be obtained for a single fuse. Furthermore, according to embodiment 7, by forming a system in which multiple fuses are linked together, if a fuse blows due to an overcurrent, it is possible to restore the system in the event of a blown fuse by replacing that fuse. 【0087】 In embodiments 6 and 7, examples were described in which one fuse is rotated 180° and connected to the other fuse, but it is also possible to connect them in the same orientation without rotation. 【0088】 Thus, the present invention may include various embodiments not described herein, and various design modifications can be made without departing from the technical idea specified by the claims. 【0089】 In embodiments 1 to 3, a configuration was described in which the conductive part and the spring part intersect at both ends and their vertical relationship is reversed so that the conductive part contacts the terminal. However, a configuration in which the conductive part contacts the terminal may also be provided by bending both ends of each conductive part (first and second conductive part) to enclose the ends of each spring part (first and second spring part) without forming an opening in the spring part. 【0090】 Furthermore, while embodiments 4 to 7 describe an example in which the spring member 1A is housed within the frame, the configuration may also accommodate the spring member 1 or the spring member 1B. When the spring member 1 is housed, the recess 201a does not need to be formed. When the spring member 1B is housed, a protrusion corresponding to the protrusion 105 is formed in the first frame portion 201. 【0091】 As described above, the spring member and fuse according to the present invention are suitable for ensuring stable electrical conductivity and for melting when an overcurrent flows. 【0092】 1, 1A, 1B Spring member 2 Conductive part 3, 3A, 3B Spring part 10, 10A, 10B Fuses 10a, 10B1 First fuse 10b, 10B2 Second fuse 21 First conductive part 22 Second conductive part 23 Connection part 31 First spring part 31a, 31b, 32a, 32b Opening 32 Second spring part 33, 34 Tension-applying part 101, 101A, 101B, 102 Member 101a, 201a Recess 101b Relief part 103, 104, 203, 204 Terminal 105 Protrusion 200, 200A, 200B Frame 201, 201A First frame part 202, 202A Second frame part 211, 221, 311, 321 Central section 212, 222, 312, 322 First end section 213, 223, 313, 323 Second end section 2011, 2012, 2013, 2014 Hole section (first hole section) 2021, 2022, 2023, 2024 Hole section (second hole section) X Second direction Y Third direction Z First direction
Claims
1. A spring member comprising: a conductive portion having electrical conductivity; and a spring portion having higher rigidity than the conductive portion and having a part of the conductive portion stacked in a first direction, wherein the conductive portion comprises: a first conductive portion extending in a second direction perpendicular to the first direction; a second conductive portion extending in the second direction and aligned with the first conductive portion in a third direction perpendicular to the first and second directions; and a connecting portion connecting the first and second conductive portions, wherein the spring portion comprises: a first spring portion on which the first conductive portion is stacked; and a second spring portion on which the second conductive portion is stacked, wherein the central portions of the first and second spring portions in the second direction are curved or bent in the first direction, the first conductive portion extends along the first spring portion, and the second conductive portion extends along the second spring portion.
2. The spring member according to claim 1, characterized in that the first conductive portion and the first spring portion intersect each other at both ends in the second direction, and the second conductive portion and the second spring portion intersect each other at both ends in the second direction.
3. The spring member according to claim 1, further comprising a tension-adding portion that protrudes from the first spring portion toward the second spring portion and supports a part of the connecting portion to add tension.
4. The spring member according to claim 3, characterized in that the tension-applying portion extends upward in the first direction.
5. The spring member according to claim 3, characterized in that the tension-applying portion extends along the third direction.
6. A fuse comprising: a spring member according to any one of claims 1 to 5; a frame for housing the spring member; and a terminal inserted into and fixed to the frame and in contact with a part of the spring portion, wherein the frame has an opening in the side wall at one end of the frame in the second direction, forming a hole that creates a space within the frame, and the hole is formed such that a part of the conductive portion is exposed to the space, and the terminal is in contact with the part of the conductive portion exposed to the space.
7. The fuse according to claim 6, characterized in that the hole exposes the central portion of the conductive portion in the second direction into the space.
8. The fuse according to claim 6, characterized in that the hole exposes both ends of the conductive portion in the second direction into the space.
9. The fuse according to claim 6, wherein the hole comprises a first hole that forms a space for exposing the central portion of the conductive portion in the second direction, and a second hole that forms a space for exposing both ends of the conductive portion in the second direction, and a terminal other than the terminal is inserted into at least one of the first and second holes.
10. A fuse into which a terminal can be inserted, comprising: a spring member according to any one of claims 1 to 5; and a frame housing the spring member, wherein the frame has at least one of a first hole having an opening in the side wall of one end of the frame in the second direction, which forms a space for exposing the central part of the conductive part in the second direction; and a second hole having a space for exposing both ends of the conductive part in the second direction, and when the terminal is inserted into the frame, the terminal contacts a part of the conductive part exposed in the space.
11. A fuse system comprising a plurality of fuses connected in the second direction, each fuse having a spring member according to any one of claims 1 to 5, a frame for housing the spring member, and a terminal that contacts a part of the spring portion, wherein the frame of each fuse in the plurality of fuses has a plurality of holes formed in the side walls of both ends of the frame in the second direction, each having an opening, forming a space that exposes a part of the conductive portion, and in each of the plurality of fuses, the terminal of the fuse is pre-inserted and fixed into a hole having an opening in one of the side walls of either end in the second direction, so as to contact a part of the conductive portion exposed in the space, and in adjacent fuses of the plurality of fuses, the terminal of another fuse can be inserted into a hole having an opening in the other side wall of either end in the second direction, and when the terminal of the other fuse is inserted into the frame of the first fuse, the terminal of the other fuse contacts a part of the conductive portion exposed in the space of the first fuse.
12. The fuse system according to claim 11, wherein a hole having an opening in one of the side walls on either end of the second direction is formed of either a first hole that forms a space for exposing the central part of the conductive portion in the second direction, or a second hole that forms a space for exposing both ends of the conductive portion in the second direction, and a hole having an opening in the other side wall on either end of the second direction is formed of either the first hole that forms a space for exposing the central part of the conductive portion in the second direction, or the second hole that forms a space for exposing both ends of the conductive portion in the second direction.
13. The fuse system according to claim 11, characterized in that the first fuse and the other fuse are connected in the second direction in the same orientation around the axis of the second direction.
14. The fuse system according to claim 11, characterized in that the first fuse and the other fuse are connected in the second direction in a orientation rotated 180° around the axis of the second direction.