JPH0745910Y2 - Intermediate connection terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an intermediate connection terminal used in an electrical junction box.

[Conventional technology]

[Prior Art] As shown in FIG. 7, an intermediate connection terminal used in a conventional electrical junction box is formed by punching out a protruding contact piece formed by punching at the tip of a bottom plate 21 to inwardly return to form a contact 22. A blade receiving part 20 formed by bending both sides of the bottom plate 21 into a rectangular tube shape so as to wrap the contactor 22, and a bottom plate 21 continuous with the blade receiving part 20.
The sleeve receiving members formed by punching the sleeve pieces punched on both sides inward are bent inward in a semi-circular shape and the blade receiving portions 25 having the contacts 26, 26 are continuously and integrally provided in the longitudinal direction. It is also found in Japanese Kokoku 59-34064. As shown in FIG. 8, a plug terminal A of a bus bar is inserted and connected to the blade receiving portion 25, and a blade terminal B of a blade type fuse is inserted and connected to the blade receiving portion 20 of the intermediate connection terminal.

In addition, like the relay terminal for the plate fuse device of Japanese Utility Model Publication No. 56-86776, on the side connected to the terminal part of the plate fuse, face the middle of the back plate from the upper or lower end of the back plate. A curved elastic flat plate portion, and a fixed flat plate portion with an insertion guide that extends from both left and right sides of the back plate portion so as to embrace it, bends, and faces each other at the center,
The terminal portion of the plate fuse is elastically sandwiched between the elastic flat plate portion and the fixed flat plate portion, and on the side connected to the plate-like terminal portion such as the bus bar, the cross section is arcuate from the left and right sides of the back plate portion. It has a curved elastic plate portion, and one metal piece so that a plate-shaped terminal portion such as a bus bar can be elastically sandwiched between the curved portion of the elastic plate portion and the back plate portion. Relay terminals for plate fuse devices formed from plates are known.

In addition, like the relay terminal for wiring board of Japanese Utility Model Laid-Open No. 61-177382, side walls are provided on both sides of a board made of sheet metal, and an electric contact portion for a mating terminal is provided at one end of the board and at the other end side of the board A notch for inserting a wiring board is provided in the side wall, and a first folded back tongue elastically contacting a conductive path of the wiring board when the wiring board is inserted into the notch is integrally provided on the substrate. The free end is bent over the substrate to form an upper wall, and the upper wall integrally engages with a corresponding concave portion or hole of the wiring board when facing the first folded back tongue piece and inserted into the notch. When the wiring board is pulled in the direction in which the wiring board is pulled out, the second folding tongue piece engages with the concave portion of the wiring board, and the second folding tongue piece receives a downward force. Press down to strengthen the pressure contact holding force and force the relay terminal in the opposite direction. When applied, the relay terminal moves to the front of the housing, the push-up piece of the first folded tongue engages the step and receives an upward force, and this tongue pushes up the wiring board and strengthens the contact pressure against the wiring board. Wiring board relay terminals configured to do so are known.

[Problems to be solved by the device]

The conventional intermediate connecting terminal shown in FIG. 7 has a blade receiving portion.
The width of the blade terminal A of the bus bar that is inserted into 25 and connected is 5 m
If it is m or more, the contact 2 according to the width of the blade terminal A
The bending radii R of 6 and 26 can be made large, and a sufficient spring force and bending amount can be obtained to surely press the blade terminal A of the bus bar against the bottom plate 21, but a blade blade of a miniaturized blade type fuse. The width of terminal B is reduced to 3 mm or less,
The width of the blade terminal A of the bus bar is also as small as 3 mm or less, so the blade receiving part should match the width of the blade terminal A of the bus bar.
When the bending radius R of the contacts 26, 26 formed on the 25 is reduced, the amount of bending of the contacts 26, 26 is reduced, and not only a predetermined spring force cannot be obtained, but also the contacts 26, 26 When the contact force is applied, the contacts 26, 26 are plastically deformed so as to easily open outward, which causes various electrical accidents due to poor contact, which is a problem.

In addition, since the relay terminal for the plate fuse device disclosed in the utility model has the same configuration as the configuration shown in FIGS. 7 and 8, the same problems as described above occur. The board relay terminal engages the second folded tongue piece with the concave portion of the wiring board when the wiring board is pulled in the direction of extraction, and when the force in the opposite direction is applied to the relay terminal, the relay terminal is relayed. Since the terminal moves to the front of the housing and the push-up piece of the first folded back tongue piece has to be engaged with the step portion, it is not easy to always engage these engagements accurately, and it is easy to disengage. There is.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide an intermediate connection terminal having stable electrical characteristics over time.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the intermediate connection terminal of the present invention comprises a lower short plate portion 4 at a center inner side end portion 3d of a side plate portion 3c on one side of one bottom plate half portion 3a of a narrow rectangular bottom plate portion 3. And an elongated contact piece 5a is provided continuously from the lower layer short plate portion 4 in parallel with the side plate portion 3c, and an upper layer plate portion 6 is provided continuously with the side plate portion 3e on the other side of the bottom plate half portion 3a. Side plate portion 3c and lower short plate portion 4 are bent into a rectangular tube shape above the bottom plate half portion 3a, and the other side plate portion 3e is formed.
And the upper layer plate portion 6 are bent into a rectangular tube shape above the bottom plate half portion 3a, the upper layer plate portion 6 is overlapped on the lower layer short plate portion 4, and the central portion of the elongated contact piece 5a is close to the bottom plate half portion 3a. The first blade receiving portion 2 in which the curved contact piece 5 is formed by bending the rising tip portion 5b to abut the outer side edge 6a of the upper layer plate portion 6 so that the thin rectangular bottom plate portion 3 The elongated contact piece 11a that protrudes from the end portion of the other half 3b of the bottom plate is folded back inward.
The side plate portions 3f and 3g on both sides of the bottom plate half 3b and the upper plate portions 12 and 12 connected to the both side plate portions are bent into a rectangular tube shape, and the upper plate portions 12 and 12 are folded over the contact piece 11. The second blade receiving portion 10 formed by abutting with each other is provided, and the first blade receiving portion 2 and the second blade receiving portion 10 are continuously and integrally provided in the longitudinal direction to form an intermediate connection terminal.

[Action]

The elongated contact piece 5a of the first blade receiving portion 2 was formed by bending the central portion of the elongated contact piece 5a so as to be close to the bottom plate half portion 3a and contacting the rising tip 5b thereof with the outer edge 6a of the upper layer plate portion 6. Curved contact piece 5
Has a rear end portion supported by the lower layer short plate portion 4 and a rising tip portion 5b abuttingly supported by the outer side edge 6a of the upper layer plate portion 6, so that the spring force of the curved contact piece 5 is prevented. Then the first blade receiving part 2
When the blade terminal A of the bus bar is inserted into the inside, the curved contact piece 5
Is bent upward, and the repulsive spring force causes the blade terminal A of the bus bar to contact the narrow rectangular bottom plate portion 3 with elastic pressure, and the curved contact piece 5
It is clamped and held between and the narrow rectangular bottom plate portion 3.

When the blade terminal B of the blade type fuse is inserted into the second blade receiving portion 10 against the spring force of the folded contact piece 11, the folded contact piece 11 bends downward and the repulsive spring force of the blade type fuse causes The blade terminal B is elastically contacted with the upper surface of the second blade receiving portion 10, and is sandwiched and held between the folded contact piece 11 and the upper surface of the second blade receiving portion 10.

In this way, the bus bar and the blade-type fuse are electrically connected by the first blade receiving portion 2 and the second blade receiving portion 10 of the intermediate connection terminal 1.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, FIG. 3 is a left side view, FIG. 4 is a right side view, and FIG. In the figure, 1 is a first blade receiving portion 2 and a second blade receiving portion 10
Is an intermediate connection terminal which is continuously and integrally provided in the longitudinal direction, and is formed by bending the respective parts formed by punching out a conductive metal plate such as a copper alloy as shown in FIG.

As shown in FIG. 5, a conductive metal plate such as a copper alloy is punched out to divide the thin rectangular bottom plate portion 3 into one bottom plate half 3a and the other bottom plate half 3b. In 3a, a lower layer short plate portion 4 is continuously provided at a center inner side end portion 3d of a side plate portion 3c on one side, and an elongated contact piece 5a is continuously provided from the lower layer short plate portion 4 in parallel with the side plate portion 3c. Then, the upper layer plate portion 6 is connected to the side plate portion 3e on the other side of the bottom plate half portion 3a.

On the other half of the bottom plate 3b, as shown in FIG.
An elongated protruding piece (11a) is provided so as to project from the end portion, and upper plate portions (12, 12) connected to side plate portions (3f, 3g) on both sides of the bottom plate half portion (3b) are connected in series.

By bending the punched conductive metal plate, one side plate part 3c and the lower short plate part 4 in one bottom plate half part 3a of the narrow rectangular bottom plate part 3 are formed in a rectangular tube shape above the bottom plate half part 3a. The side plate 3e on the other side and the upper layer plate 6 are bent into a rectangular tube shape above the bottom plate half 3a, and the upper layer plate 6 is superposed on the lower layer short plate 4 and the central portion of the elongated contact piece 5a is folded. It is curved so as to be close to the bottom plate half 3a, and its rising tip 5b is brought into contact with the outer side edge 6a of the upper layer plate 6 to form the curved contact piece 5, and the first blade receiving portion 2 is formed. Constitute.

Also, in the other bottom plate half 3b of the narrow rectangular bottom plate 3, the elongated projection piece 11a protruding from the end is folded back inward to form the folded contact piece 11, and the side plate portions on both sides of the bottom plate half 3b.
3f, 3g and the upper plate portions 12, 12 connected to the both side plate portions 3f, 3g are bent into a rectangular tube shape, and the upper plate portions 12, 12 are folded back to the contact piece 11 described above.
The second blade receiving portion 10 is formed by abutting on the upper side of.

The first blade receiving portion 2 and the second blade receiving portion 10 are continuously and integrally provided in the longitudinal direction as shown in the figure to constitute the intermediate connection terminal 1 of the present invention.

Reference numeral 3h is a terminal contact portion formed by bulging the thin rectangular bottom plate portion 3 into the first blade receiving portion 2. Reference numeral 13 denotes a terminal guide portion, which is formed by bending the projecting pieces 13a, 13a shown in FIG. 5 which are punched out at the tips of the upper plate portions 12, 12 of the second blade receiving portion 10 and obliquely upward.

In order to electrically connect the blade terminal A of the bus bar and the blade terminal B of the blade type fuse by the intermediate connection terminal of the present invention constructed as described above, as shown in FIG. When the blade terminal A of the bus bar is inserted into the spring 2 against the spring force of the curved contact piece 5, the curved contact piece 5 bends upward and the repulsive spring force causes the blade terminal A of the bus bar to move to the narrow rectangular bottom plate portion 3. The terminal contact portion 3h thus formed is contacted, and the terminal contact portion 3h and the curved contact piece 5 are clamped and held.

When the blade terminal B of the blade type fuse is inserted into the second blade receiving portion 10 against the spring force of the folded contact piece 11, the folded contact piece 11 is inserted.
Is bent downward and the repulsive spring force causes the blade terminal B of the blade-type fuse to come into contact with the upper plate portion 12 of the second blade receiving portion 10 and to be pinched between the upper plate portion 12 and the folded contact piece 11. Retained.

As described above, the bus bar is the first of the intermediate connection terminals 1 of the present invention.
The blade type fuse and the bus bar are electrically connected by being pinched and held by the blade receiving portion 2 and the blade type fuse being pinched and held by the second blade receiving portion 10.

Since the curved contact piece 5 and the folded contact piece 11 are formed by bending, they can be appropriately designed in the length L direction according to the required bending amount and spring force, so that the blade type fuse is small. Even if the widths of the blade terminal B and the blade terminal A of the bus bar become smaller, they can be pressed and held with a sufficient pressing force.

Further, the curved contact piece 5 provided in the first blade receiving portion 2 has its base end continuously and integrally supported by the lower layer short plate portion 4, and its free end portion abutting and supporting the opening edge of the upper layer plate portion 6. Therefore, the spring force is increased, and the holding force of the blade terminal A of the bus bar is increased.

[Effect of device]

As described above, according to the present invention, the curved contact piece 5 formed in the first blade receiving portion 2 and the folded contact piece 11 formed in the second blade receiving portion 10 are provided.
Can be appropriately designed so as to obtain the required bending amount and spring force in the length L direction,
Even if the blade type fuse is downsized and the width of the blade terminal B and the blade terminal A of the bus bar is small, there is no problem, and an intermediate connection terminal having stable electric characteristics over time can be obtained.

Further, the curved contact piece 5 provided in the first blade receiving portion 2 has its base end continuously supported integrally with the lower layer short plate portion 4 and its free end supported by the opening edge of the upper layer plate portion 6. Therefore, the spring force is increased, and the blade terminal A of the bus bar that requires almost no insertion / removal can be mechanically and firmly held.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view, FIG. 3 is a left side view, FIG. 4 is a right side view, FIG. 5 is a developed view, and FIG. FIGS. 7 and 8 are a perspective view showing a conventional intermediate connection terminal and an explanatory view showing its usage state, respectively. 1: Intermediate connection terminal 2: First blade receiving part 3: Narrow rectangular bottom plate part 3a, 3b: Bottom plate half part 3c: Side plate part 3d: Central inner side end part 3e, 3f, 3g: Side plate part 4: Lower layer short plate Part 5: Curved contact piece 5a: Slender contact piece 5b: Rising tip part 6: Upper layer plate part 10: Second blade receiving part 11: Folded contact piece 11a: Slender protruding piece 12: Upper plate part

Claims (1)

[Scope of utility model registration request] 1. A lower layer short plate part (4) is connected to a central inner side end part (3d) of a side plate part (3c) on one side of one bottom plate half part (3a) of a narrow rectangular bottom plate part (3). The elongated contact piece (5a) is installed parallel to the lower layer short plate (4) and the side plate (3c).
The bottom plate half part (3a) is connected to the other side plate part (3e) of the upper layer plate part (6), and the one side plate part (3c) and the lower layer short plate part (4) are connected. Is bent above the bottom plate half (3a) into a rectangular tube shape, and the side plate part (3e) and the upper layer plate part (6) on the other side are bent above the bottom plate half part (3a) into a rectangular tube shape to form an upper layer plate. Part (6) on the lower layer short plate part (4), and the elongated contact piece (5a)
The center portion of the curved plate is curved so as to be close to the bottom plate half (3a), and its rising tip (5b) is brought into contact with the outer edge (6a) of the upper layer plate (6) to bend the curved contact piece 5 Formed the first
A blade receiving part (2) is provided, and an elongated projecting piece (11a) projecting from the end of the other bottom plate half part (3b) of the narrow rectangular bottom plate part (3) is folded back inward to make a folded contact piece (11). And the side plate portions (3f) and (3g) on both sides of the bottom plate half portion (3b) and the upper plate portions (12) and (12) connected to the both side plate portions are bent into a rectangular tube shape. (12),
A second blade receiving portion (10) formed by abutting (12) above the folded contact piece (11) is provided, and the first blade receiving portion (2) and the second blade receiving portion (10) are elongated. Intermediate connection terminal characterized by being provided continuously in one direction.