Electrical connection terminals

Abstract

To provide an electrical connection terminal that can suppress deformation of the frame due to external forces. [Solution] The fuse terminal 1 comprises a frame 30 formed in a cylindrical shape having a bottom wall 4, a pair of side walls 5, 6 rising from both side edges of the bottom wall 4, and a pair of ceiling walls 31, 33 extending perpendicularly inward from the rear ends of the rising ends of the side walls 5, 6; a spring piece 10 extending from the front end of the side walls 5, 6, folded inward at a bent portion 11 and extending toward the rear end; a locking hole 34 formed in the ceiling wall 33; a first locking piece 32 formed to protrude toward the bottom wall 4 from the extended end of the ceiling wall 31 and locking the inner opening edge of the locking hole 34; and a second locking piece 38 formed to protrude toward the bottom wall 4 from the base side of the first locking piece 32 in the ceiling wall 31 and locking the front end of the extended end of the ceiling wall 33.

Description

Technical Field

[0001] The present invention relates to an electrical connection terminal.

Background Art

[0002] Conventionally, fuse terminals have been used as electrical connection terminals that are housed in pairs inside the housing of an electrical connection box such as a fuse box, and a pair of tab terminals of a fuse are respectively inserted between contact spring pieces (see Patent Documents 1 and 2).

[0003] For example, the terminal fitting (electrical connection terminal) of Patent Document 2 above has a connection part (terminal connection part) whose substantially front half part is connected to the tab terminal of the fuse, and a wire crimping part for crimping the wire in the substantially rear half part.

[0004] The connection part consists of a bottom wall in the shape of an elongated flat plate, a pair of flat side walls that rise upward at almost right angles from the left and right side edges of this bottom wall, and a pair of flat ceiling walls that extend inward at almost right angles from the rising ends of both side walls. Elastic contact pieces (spring pieces) are respectively formed on both side walls by cutting and raising a part of each inward. The elastic contact pieces extend in a cantilevered manner forward, and when viewed from above, they extend obliquely inward toward the front, are bent outward near the front end, and the front end part is obliquely outward. This bent part serves as a contact part that contacts the tab terminal.

[0005] A substantially square locking hole is formed at the rear end part of one of the left and right ceiling walls, and a substantially square locking piece protrudes from the inner edge of the rear end part of the other ceiling wall. The locking piece is locked to the locking hole in a state where it is bent downward (toward the bottom wall side). By this locking, a square tube part (frame body) is formed at the rear end part of the connection part in a closed (continuous) form over the entire circumference by the bottom wall, the left and right side walls, and the left and right ceiling walls. The square tube part can suppress deformation of the connection part in the terminal fitting due to an external force.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Japanese Patent Publication No. 2000-106078 [Patent Document 2] Japanese Patent Publication No. 2004-206912 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, in conventional terminal fittings, the rectangular tube portion can maintain its original shape against external forces that cause the side walls to separate due to the locking of the locking piece and locking hole, but it may not be able to maintain its original shape against external forces that cause the side walls to come together because the locking piece and locking hole do not lock.

[0008] In other words, terminal fittings made by bending a conductive member punched into a predetermined shape require a locking piece to be inserted into a locking hole and locked in place as the terminal fitting is bent into a box shape. Therefore, the opening width of the locking hole must be made larger than the thickness of the locking piece to facilitate insertion of the locking piece. Consequently, in a locked state where the locking piece is in contact with the inner opening edge of the locking hole and resists external forces that move both side walls apart, a gap is created between the locking piece and the outer opening edge of the locking hole, making it impossible to resist external forces that move both side walls together.

[0009] Furthermore, if the terminal fitting could not maintain the shape of the rectangular tube portion at the time of its formation, the spring load of the elastic contact piece would change due to the deformation (tilting) of the rectangular tube portion, as both side walls are connected to the elastic contact piece. This could potentially impair a stable electrical contact state with the tab terminal. The present invention has been made in view of the above circumstances, and its object is to provide an electrical connection terminal that can suppress deformation of the frame due to external forces. [Means for solving the problem]

[0010] To achieve the aforementioned objectives, the electrical connection terminal according to the present invention is characterized by the following: A cylindrical frame having a flat bottom wall, a pair of side walls rising upward from both side edges of the bottom wall, and a pair of ceiling walls extending perpendicularly inward from the rear ends of the rising ends of the pair of side walls, A spring piece extending from at least one of the front ends of the side wall, folded inward at the bent portion, and extending toward the rear end, A locking hole formed in one of the ceiling walls, A first locking piece is formed to protrude from the extended end of the other ceiling wall toward the bottom wall and to lock the inner opening edge of the locking hole, A second locking piece is formed on the other ceiling wall, protruding toward the bottom wall side from the base side of the first locking piece, and locking the leading edge of the extended end on one of the ceiling walls, An electrical connection terminal equipped with this feature. [Effects of the Invention]

[0011] According to the electrical connection terminal of the present invention, deformation of the frame due to external force can be suppressed.

[0012] The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by referring to the attached drawings and reading through the embodiments for carrying out the invention described below (hereinafter referred to as "embodiments"). [Brief explanation of the drawing]

[0013] [Figure 1] Figure 1 is a perspective view of the main part of an electrical connection terminal according to one embodiment of the present invention. [Figure 2] Figure 2 is a rearward perspective view of the main part of the electrical connection terminal of this embodiment, which has been partially broken. [Figure 3] Figure 3 is a plan view of the main part of the electrical connection terminal of this embodiment. [Figure 4] Figure 4 is a side view of the main part of the electrical connection terminal of this embodiment. [Figure 5] Figure 5 is a view of the VV section in Figure 4. [Figure 6] Figure 6 is an exploded view of the main parts of the electrical connection terminal of this embodiment. [Figure 7] Figure 7 is an enlarged view of the main part showing the intermediate state of bending of the electrical connection terminal shown in Figure 6. [Figure 8] Figure 8 is an enlarged view of the main part showing the state where the electrical connection terminal shown in Figure 7 is further bent. [Figure 9] Figure 9 is a rear view of the electrical connection terminal shown in Figure 8 as viewed from the rear. [Figure 10] Figure 10 is a cross-sectional view for explaining the state where an external force in the direction in which both side walls are separated acts on the electrical connection terminal of the present embodiment. [Figure 11] Figure 11 is a cross-sectional view for explaining the state where an external force in the direction in which both side walls approach acts on the electrical connection terminal of the present embodiment. [Figure 12] Figure 12 is a cross-sectional view for explaining the state where an external force in the direction in which both side walls are separated acts on the electrical connection terminal according to the reference example. [Figure 13] Figure 13 is a cross-sectional view for explaining the state where an external force in the direction in which both side walls approach acts on the electrical connection terminal according to the reference example.

Mode for Carrying Out the Invention

[0014] Specific embodiments of the present invention will be described below with reference to the respective drawings. (Embodiment) Figure 1 is a perspective view of the main part of the fuse terminal 1 according to an embodiment of the present invention. Figure 2 is a perspective view of the main part of the fuse terminal 1 of the present embodiment as viewed from the rear with a part broken away. Figure 3 is a plan view of the main part of the fuse terminal 1 of the present embodiment. Figure 4 is a side view of the main part of the fuse terminal 1 of the present embodiment. Figure 5 is a cross-sectional view taken along the line V-V in Figure 4 as viewed in the direction of the arrow.

[0015] The fuse terminal 1 as an electrical connection terminal according to an embodiment of the present invention is manufactured by bending a conductive member punched out into a predetermined shape. The fuse terminal 1 is housed in a cavity of a fuse housing not shown.

[0016] For the sake of explanation, the "front-back direction," "left-right direction," and "up-down direction" are defined below as shown in Figures 1 and 2. These "front-back direction," "left-right direction," and "up-down direction" are orthogonal to each other. The front-back direction coincides with the mating direction of the fuse terminal 1 and the tab terminal 50. The side facing the fuse terminal 1 in the mating direction (the side towards which the tab terminal 50 approaches) is called the "front side," and the side facing the fuse terminal 1 in the unmating direction (the side away from which the tab terminal 50 moves) is called the "rear side."

[0017] As shown in Figures 1 to 3, the fuse terminal (electrical connection terminal) 1 according to this embodiment comprises a terminal connection portion 2 and a wire crimping portion 35. The terminal connection section 2 has a rear frame 30 and an electrical contact section 3 connected to the front of the frame 30.

[0018] The electrical contact portion 3 consists of a flat bottom wall 4 and a pair of side walls 5 and 6 that rise upward from both side edges of the bottom wall 4. Within the electrical contact portion 3, spring pieces 10 are provided on each of the pair of side walls 5 and 6, extending inward from the tip side of each side wall 5 and 6 at a bent portion 11 and extending toward the rear end. A terminal entry portion 8 is formed on the front surface of the electrical contact portion 3, and a tab terminal 50 of a fuse (not shown) can enter the electrical contact portion 3 through the terminal entry portion 8.

[0019] Each spring piece 10 contacts the tab terminal 50 of the fuse inserted between a pair of side walls 5 and 6 that constitute the terminal entry portion 8. Each spring piece 10 includes a curved contact portion 13 formed convexly toward the tab terminal 50 in the middle portion along the extension direction (rear direction) of the spring piece 10 that is folded inward at the bent portion 11, and a curved portion 15 formed convexly toward the inner surfaces of the side walls 5 and 6 to which the spring pieces 10 are connected, between the extension end 17 along the extension direction of the spring piece 10 and the curved contact portion 13.

[0020] As shown in Figures 3 to 5, the frame 30 is a rectangular cylindrical box formed from the rear end of the bottom wall 4, the rear ends of a pair of side walls 5 and 6, one ceiling wall 33 formed by bending inward at approximately a right angle from the rising end of the rear end of one side wall 5, and the other ceiling wall 31 extending at approximately a right angle toward the side wall 5 from the rising end of the rear end of the other side wall 6.

[0021] A roughly rectangular locking hole 34 is formed in the ceiling wall 33. As shown in Figure 2, the locking hole 34 in this embodiment is opened across the bent portion (corner) between the base of the ceiling wall 33 and the side wall 5. The tip edge 33a of the extended end of the ceiling wall 33 is formed in a straight line parallel to the inner opening edge 34a of the locking hole 34 (see Figure 6).

[0022] The ceiling wall 31 is provided with a first locking piece 32 that protrudes from the tip edge of the extended end toward the bottom wall 4 and locks the inner opening edge 34a of the locking hole 34, and a second locking piece 38 that protrudes toward the bottom wall 4 from the base side of the extended end toward the first locking piece 32 and locks the tip edge 33a of the extended end toward the ceiling wall 33. In this embodiment, the second locking piece 38 is formed by cutting a part of the base side of the extended end toward the first locking piece 32 perpendicularly toward the inside (towards the bottom wall 4).

[0023] Then, the first locking piece 32, which is bent downward (towards the bottom wall 4), is inserted into the locking hole 34 and faces the inner opening edge 34a, and the second locking piece 38, which is formed to protrude downward (towards the bottom wall 4), faces the leading edge 33a of the ceiling wall 33, thereby locking the ceiling wall 31 and the ceiling wall 33 together.

[0024] In this manner, a frame 30 is formed at the rear end of the terminal connection portion 2, which is enclosed (continuous) around the entire circumference by a bottom wall 4, left and right side walls 5 and 6, a top wall 33, and a top wall 31. The frame 30 prevents the terminal connection portion 2 of the fuse terminal 1 from being deformed by external forces.

[0025] The wire crimping section 35 has a bottom wall 36 extending from the bottom wall 4 of the terminal connection section 2, and a pair of wire crimping sections 37, 37 extending from both ends of the bottom wall 36. The wire is crimped by crimping it with these wire crimping sections 37, 37.

[0026] Next, we will explain the procedure for manufacturing the fuse terminal 1 configured in this way by bending it. Figure 6 is an exploded view of the main parts of the fuse terminal 1 of this embodiment, showing the terminal connection portion 2 of the fuse terminal 1, and illustrating the bent portion (region) with dashed lines. Figure 7 is an exploded view of the main parts showing the fuse terminal 1 shown in Figure 6 in the process of being bent. Figure 8 is an exploded view of the main parts showing the fuse terminal 1 shown in Figure 7 in a further bent state. Figure 9 is a rear view of the fuse terminal 1 shown in Figure 8, viewed from the rear.

[0027] First, as shown in Figure 6, the fuse terminal 1, which is punched out of a flat conductive material into a predetermined shape, has its first locking piece 32 and second locking piece 38 on the ceiling wall 31 bent at a right angle in the direction that faces the bottom wall 4 side of the frame 30 (upward direction) when the frame 30 is formed into a rectangular cylindrical shape.

[0028] Next, as shown in Figure 7, ceiling walls 31 and 33 are bent at right angles so that they rise inward. The spring piece 10 is also bent so that it folds inward from the tip side of each side wall 5, 6 at the bent portion 11 and extends toward the rear end.

[0029] Subsequently, as shown in Figures 8 and 9, the pair of side walls 5 and 6 are bent inward along both side edges of the bottom wall 4 so that they rise upward. At this time, the first locking piece 32 rotates so as the frame 30 is bent into a rectangular box shape that it is inserted into the locking hole 34.

[0030] Then, as shown in Figure 5, when the frame 30 is formed into a rectangular cylindrical shape, the first locking piece 32 is inserted into the locking hole 34 and locked to the inner opening edge 34a, and the second locking piece 38 is locked to the leading edge 33a of the ceiling wall 33. The first locking piece 32 and the second locking piece 38 may or may not be in contact with the inner opening edge 34a of the locking hole 34 and the leading edge 33a of the ceiling wall 33, respectively.

[0031] Furthermore, in the fuse terminal 1 of this embodiment, the locking hole 34 is opened across the bent portion (corner) between the base of the ceiling wall 33 and the side wall 5. Therefore, the outer opening edge 34b of the locking hole 34 is not located on the rotational trajectory of the first locking piece 32 when the frame 30 is bent into a rectangular box shape, and does not interfere with the tip of the first locking piece 32. As a result, with the fuse terminal 1 of this embodiment, it is easy to adjust the position when inserting the first locking piece 32 into the locking hole 34 during the bending process.

[0032] Next, the operation of the fuse terminal 1 according to this embodiment will be explained. Figure 10 is a cross-sectional view illustrating the state in which an external force acts on the fuse terminal 1 of this embodiment in a direction that causes both side walls 5 and 6 to move away from each other. Figure 11 is a cross-sectional view illustrating the state in which an external force acts on the fuse terminal 1 of this embodiment in a direction that causes both side walls 5 and 6 to move towards each other.

[0033] As shown in Figure 10, when an external force (indicated by the white arrows in the figure) acts on the fuse terminal 1 in a direction that separates the side walls 5 and 6, the first locking piece 32 on the frame 30 catches on the inner opening edge 34a of the locking hole 34. As a result, the frame 30 is prevented from deforming further by the locking of the first locking piece 32 on the inner opening edge 34a of the locking hole 34.

[0034] Furthermore, as shown in Figure 11, when an external force (indicated by the white arrow in the figure) acts on the fuse terminal 1 in a direction that brings both side walls 5 and 6 closer together, the second locking piece 38 on the frame 30 interferes with the leading edge 33a of the ceiling wall 33. As a result, the second locking piece 38 is locked to the leading edge 33a of the ceiling wall 33, preventing further deformation of the frame 30.

[0035] Therefore, according to the fuse terminal 1 of this embodiment, deformation of the frame 30 can be suppressed against both external forces that move the side walls 5 and 6 of the fuse terminal 1 away from each other and external forces that move them together. Therefore, the frame 30 maintains its original shape and the distance (spacing) between the pair of spring pieces 10 can be kept appropriate, preventing the spring load of the spring pieces 10 from changing due to deformation (tilting) of the frame 30, which would impair the stable electrical contact state with the tab terminal 50.

[0036] Furthermore, in the fuse terminal 1 of this embodiment, the second locking piece 38 is formed by vertically cutting inward a portion of the base side of the first locking piece 32 on the ceiling wall 31. Therefore, when forming the fuse terminal 1 from a metal plate of conductive metal (copper or copper alloy, etc.) by press processing (punching, bending), the second locking piece 38 can be easily formed at the same time, thereby suppressing an increase in manufacturing costs.

[0037] Furthermore, in the fuse terminal 1 of this embodiment, the locking hole 34 is opened across the bent portion (corner) between the base of the ceiling wall 33 and the side wall 5. Therefore, the outer opening edge 34b of the locking hole 34 is not located on the rotational trajectory of the first locking piece 32 when the frame 30 is bent into a rectangular box shape, and does not interfere with the tip of the first locking piece 32. As a result, with the fuse terminal 1 of this embodiment, it is easy to adjust the position when inserting the first locking piece 32 into the locking hole 34 during the bending process.

[0038] Furthermore, in the fuse terminal 1 of this embodiment, spring pieces 10 are provided on a pair of side walls 5 and 6, and the tab terminal 50 of the fuse is inserted between these pairs of spring pieces 10, 10. Therefore, when the tab terminal 50 of the fuse is inserted between these pair of spring pieces 10, 10, each spring piece 10 elastically deforms in a direction that separates them from each other, thereby allowing the insertion of the tab terminal 50 of the fuse. As a result, the spring force acts evenly on each tab terminal 50 of the fuse being inserted, allowing the tab terminal 50 of the fuse to be inserted smoothly.

[0039] (Reference example) Figure 12 is a cross-sectional view illustrating a state in which an external force acts on the fuse terminal 1A according to the reference example, causing the side walls 5 and 6 to move away from each other. Figure 13 is a cross-sectional view illustrating a state in which an external force acts on the fuse terminal 1A according to the reference example, causing the side walls 5 and 6 to move closer together. Note that the fuse terminal 1A according to the reference example has the same configuration as the fuse terminal 1 of the above embodiment, excluding the second locking piece 38, so similar components are denoted by the same reference numerals and detailed explanations are omitted.

[0040] As shown in Figure 12, the fuse terminal 1A, which serves as an electrical connection terminal in the reference example, has only the first locking piece 32 provided at the extended end of the ceiling wall 31, and the second locking piece 38 is not provided.

[0041] Then, as shown in Figure 12, when an external force (indicated by the white arrow in the figure) acts on the fuse terminal 1A in a direction that separates the side walls 5 and 6, the first locking piece 32 on the frame 30 catches on the inner opening edge 34a of the locking hole 34. As a result, the frame 30A is prevented from deforming further by the locking of the first locking piece 32 on the inner opening edge 34a of the locking hole 34.

[0042] In contrast, as shown in Figure 13, when an external force (indicated by the white arrows in the figure) acts in a direction that brings both side walls 5 and 6 closer to the fuse terminal 1A, the leading edge 33a of the ceiling wall 33 does not catch on the ceiling wall 31. As a result, both side walls 5 and 6 tilt inward, and the deformation of the frame 30A cannot be stopped.

[0043] Therefore, in the fuse terminal 1A of the reference example, it is difficult to suppress the deformation of the frame 30A against external forces that move both side walls 5 and 6 of the fuse terminal 1A closer together. Therefore, the fuse terminal 1A in the reference example cannot maintain the shape of the frame 30A at the time of its formation and properly maintain the distance (spacing) between the pair of spring pieces 10. As a result, the deformation (tilting) of the frame 30A may change the spring load of the spring pieces 10, potentially impairing a stable electrical contact state with the tab terminal 50.

[0044] Furthermore, the present invention is not limited to the embodiments described above, and can be modified, improved, etc., as appropriate. In addition, the material, shape, dimensions, number, placement, etc. of each component in the embodiments described above are arbitrary and not limited, as long as they can achieve the present invention.

[0045] In the fuse terminal 1 of the embodiment described above, the second locking piece 38 is formed by vertically cutting inward a portion of the base side of the first locking piece 32 on the ceiling wall 31, but the electrical connection terminal of the present invention is not limited to this. For example, the second locking piece can be formed by bending projections protruding from both side edges of the ceiling wall 31 downward (towards the bottom wall). Furthermore, in the fuse terminal 1 of the embodiment described above, the locking hole 34 is opened across the bent portion (corner) between the base of the ceiling wall 33 and the side wall 5, but the electrical connection terminal of the present invention is not limited to this. For example, the locking hole can also be opened in the middle portion of the ceiling wall 33.

[0046] Herein, the features of the embodiments of the electrical connection terminal according to the present invention described above are briefly summarized and listed below in [1] to [4]. [1] A cylindrical frame (30) having a flat bottom wall (4), a pair of side walls (5,6) rising upward from both side edges of the bottom wall (4), and a pair of ceiling walls (31,33) extending perpendicularly inward from the rear ends of the rising ends of the pair of side walls (5,6), A spring piece (10) extends from the tip side of at least one of the aforementioned side walls (5:6) by being folded inward at the bent portion (11) and extending toward the rear end, A locking hole (34) formed in one of the ceiling walls (33), A first locking piece (32) is formed to protrude from the extended end of the other ceiling wall (31) toward the bottom wall (4) and to lock the inner opening edge (34a) of the locking hole (34), A second locking piece (38) is formed to protrude toward the bottom wall (4) on the other ceiling wall (31) from the base side of the first locking piece (32) and locks the leading edge (33a) of the extended end on one of the ceiling walls (33), An electrical connection terminal (fuse terminal 1) equipped with the following.

[0047] According to the electrical connection terminal (fuse terminal 1) with the configuration described in [1] above, if an external force is applied to the electrical connection terminal (fuse terminal 1) in a direction that separates both side walls (5,6), the first locking piece (32) in the frame (30) is locked to the inner opening edge (34a) of the locking hole (34), thereby preventing further deformation of the frame (30). Furthermore, if an external force is applied to the electrical connection terminal (fuse terminal 1) in a direction that brings both side walls (5,6) closer together, the second locking piece (38) on the frame (30) will lock onto the leading edge (33a) of the ceiling wall (33), preventing the frame (30) from deforming any further. Therefore, with the electrical connection terminal (fuse terminal 1) of this configuration, deformation of the frame (30) can be suppressed against both external forces that move the side walls (5,6) of the electrical connection terminal (fuse terminal 1) away from each other and external forces that move them together.

[0048] [2] The second locking piece (38) is formed by cutting a portion of the other ceiling wall (31) that is closer to the base of the first locking piece (32) inward and bend it vertically inward. The electrical connection terminal (fuse terminal 1) described in [1] above.

[0049] According to the electrical connection terminal (fuse terminal 1) with the configuration described in [2] above, when the electrical connection terminal (fuse terminal 1) is formed by press working from a metal plate of conductive metal, the second locking piece (38) can be easily formed at the same time, thereby suppressing an increase in manufacturing costs.

[0050] [3] The locking hole (34) is opened across the bent portion between the base of one of the ceiling walls (33) and the side wall (5), The electrical connection terminal (fuse terminal 1) as described in [2] above.

[0051] With the electrical connection terminal (fuse terminal 1) configured as described in [3] above, the outer opening edge (34b) of the locking hole (34) is not located on the rotational trajectory of the first locking piece (32) when the frame (30) is bent into a rectangular box shape, and does not interfere with the tip of the first locking piece (32). As a result, with the electrical connection terminal (fuse terminal 1) configured as described above, it is easy to adjust the position when inserting the first locking piece (32) into the locking hole (34) during the bending process.

[0052] [4] The spring pieces (10) are provided on the pair of side walls (5,6), and a tab terminal (50) is inserted between these pair of spring pieces (10). The electrical connection terminal (fuse terminal 1) described in any one of the above [1] to [3].

[0053] According to the electrical connection terminal (fuse terminal 1) with the configuration described in [4] above, when a tab terminal (50) is inserted between these pair of spring pieces (10,10), each spring piece (10) elastically deforms in a direction that separates them from each other, thereby allowing the insertion of the tab terminal (50). As a result, the spring force acts on the inserted tab terminal (50) in a balanced manner on both sides, allowing the tab terminal (50) to be inserted smoothly. [Explanation of Symbols]

[0054] 1…Electrical connection terminal (fuse terminal) 4…Bottom wall 5,6…Side wall 10... Spring piece 31... The other ceiling wall 32...First locking piece 33...One side of the ceiling wall 33a...Tip edge of the extended end 34… Locking hole 34a...Inner opening edge 38…Second locking piece

Claims

1. A cylindrical frame having a flat bottom wall, a pair of side walls rising upward from both side edges of the bottom wall, and a pair of ceiling walls extending perpendicularly inward from the rear ends of the rising ends of the pair of side walls, A spring piece extending from at least one of the front ends of the side wall, folded inward at the bent portion, and extending toward the rear end, A locking hole formed in one of the ceiling walls, A first locking piece is formed to protrude from the extended end of the other ceiling wall toward the bottom wall and to lock the inner opening edge of the locking hole, A second locking piece is formed on the other ceiling wall, protruding toward the bottom wall side from the base side of the first locking piece, and locking the leading edge of the extended end on one of the ceiling walls, An electrical connection terminal equipped with this feature.

2. The second locking piece is formed by vertically cutting inward a portion of the base side of the first locking piece on the other ceiling wall. The electrical connection terminal according to claim 1.

3. The locking hole is opened across the bent portion between the base of one of the ceiling walls and the side wall. The electrical connection terminal according to claim 2.

4. The spring pieces are provided on each of the pair of side walls, and a tab terminal is inserted between these pair of spring pieces. An electrical connection terminal according to any one of claims 1 to 3.

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