JPH0711413Y2 - 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]

As shown in FIG. 5, the intermediate connecting terminal used in the conventional electric junction box is formed by punching out a protruding tongue piece at the tip of the bottom plate 21 and folding it back inward to form the contactor 22.
A blade receiving portion 20 formed by bending both sides of the bottom plate 21 so as to wrap around the bottom plate 21 in a rectangular tube shape, and a sleeve piece punched and formed on both sides of the bottom plate 21 continuous with the blade receiving portion 20 are inwardly arcuate semicircles. Bent into shape and contact
The blade receiving portion 25 having the 26 and 26 formed therein is continuously and integrally provided in the longitudinal direction. (See Japanese Utility Model Publication No. 59-34064) In the intermediate connection terminal, as shown in FIG. 6, the blade terminal A of the bus bar is inserted and connected to the blade receiving portion 25, and the blade receiving portion 20 is connected to the blade type fuse. The blade terminal B is inserted and connected.

[Problems to be solved by the device]

In the intermediate connection terminal configured as described above, the 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
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.

However, in recent years, blade fuses have become smaller,
The width of the blade terminal B of the blade type fuse is 3 mm or less, which is extremely small. Along with this, the width of the blade terminal A of the bus bar is also reduced to 3 mm or less. Therefore, if the bending radius R of the contacts 26, 26 formed in the blade receiving portion 25 is reduced in accordance with the width of the blade terminal A of the bus bar, the contact 26,
Not only does the amount of flexure of 26 decrease and the prescribed spring force cannot be obtained, but also when contact force is applied to the contacts 26, 26, the contacts 26, 26 are plastically deformed so as to easily open outward. However, there were problems such as causing various electrical accidents due to poor contact.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an intermediate connection terminal having stable electrical characteristics over time.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention forms a contactor 4 by bending a tongue piece 4a punched and formed on a bottom plate 3 diagonally upward, and rolls the groove tip edge of the mark after punching the tongue piece 4a forward. And a blade receiving portion 2 formed by bending both sides of the bottom plate 3 into a rectangular tube shape so as to enclose the contact 4 with the free end tip 4b of the contact 4 and the blade. A protruding contact piece 11a punched out at the base end of the bottom plate 3 continuous with the receiving portion 2 is folded back inward to form a contactor 11, and both sides of the bottom plate 3 are formed into a rectangular tube shape so as to wrap the contactor 11. An intermediate connection terminal is formed by continuously providing a blade receiving portion 10 formed by bending in the longitudinal direction.

[Action]

When the plug blade terminal A of the bus bar is inserted into the blade receiving portion 2 against the spring force of the contact 4 provided in the blade receiving portion 2, the contact 4
Is bent downward and the repulsive spring force presses the blade terminal A of the bus bar against the upper surface of the blade receiving portion 2, and the electric contact is securely held between the upper surface and the contact 4.

Further, the step portion 5 formed by rolling forward the groove tip edge of the mark after punching out the tongue piece 4a has a free end of the contact element 4 when the contact element 4 receives an excessive bending force. The tip 4b of the portion abuts, and the plastic deformation of the contactor 4 is effectively prevented.

When the blade terminal B of the blade type fuse is inserted against the spring force of the contact 11 into the blade receiving portion 10 which is continuously and integrally formed with the blade receiving portion 2 in the longitudinal direction, the contact 11 bends downward. Due to the repulsive spring force, the blade terminal B of the blade-type fuse is pressed against the upper surface of the blade receiving portion 10 and is pressed and held between the contact 11 and the upper surface of the blade receiving portion 10, so that the bus bar and the blade-type fuse are electrically connected. Connected.

〔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 vertical sectional view of FIG. 1, and FIG. 3 is a developed view. In FIG. 1, 1 is a punched conductive metal plate made of copper alloy or the like. This is an intermediate connection terminal in which the blade receiving portion 2 and the blade receiving portion 10 are bent and integrally provided in the longitudinal direction.

Reference numeral 2 denotes one of the blade receiving portions constituting the above-mentioned intermediate connection terminal 1, and the blade receiving portion 2 forms a contactor 4 by bending a tongue piece 4a (see FIG. 3) punched and formed in the bottom plate 3 obliquely upward. And tongue
The tip of the groove, which is formed by punching out 4a, is rolled forward to form a step portion 5 with which the free end tip 4b of the contactor 4 abuts, and both sides of the bottom plate 3 are angled so as to enclose the contactor 4. It is formed by bending it into a tubular shape.

Reference numeral 6 is a terminal guide portion, and the terminal guide portion 6 is formed by punching out protruding pieces 2a, 2a (third part) formed at the tip of the upper plate of the blade receiving portion 2.
(Refer to the drawing) are each bent obliquely upward.

Reference numeral 10 denotes a blade receiving portion which is continuously and integrally provided with the blade receiving portion 2 in the longitudinal direction. The blade receiving portion 10 has a protruding tongue piece 11a (see FIG. 3) formed by punching at the base end of the bottom plate 3. The contactor 11 is formed by bending back to one side, and both sides of each of the contacts 3 are bent into a rectangular tube shape so as to wrap the contactor 11.

12 is a terminal guide portion, and the terminal guide portion 12 is the blade receiving portion.
Projecting pieces 10a, 10a (see FIG. 3) formed by punching at the tip of the upper plate of 10 are respectively bent 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 configured as described above, as shown in FIG. When the blade terminal A of the bus bar is inserted against the spring force of the contact 4, the contact 4 bends downward and the repulsive spring force causes the blade terminal A of the bus bar to press-contact with the upper surface of the blade receiving portion 2. Press contact is held between the upper surface and the contactor 4.

Further, when an excessive bending load acts on the contactor 4, as described above, the step end 5 of the contactor 4 is provided on the step portion 5 provided by rolling forward the groove tip edge of the mark formed by punching out the tongue piece 4a. Free end tip
Since the 4b abuts, the plastic deformation of the contact 4 is effectively prevented.

Blade receiving portion 10 provided continuously with the blade receiving portion 2 in the longitudinal direction.
When the blade terminal B of the blade type fuse is inserted into the inside against the spring force of the contact element 11, the contact element 11 bends downward and the repulsive spring force causes the blade terminal B of the blade type fuse to move to the blade receiving portion.
The upper plate 10 is pressure-contacted, and the upper plate and the contact 11 are pressure-contacted and held, and the blade-type fuse and the bus bar are electrically connected.

Thus, the contactor 4 provided in the blade receiving portion 2 is formed by bending the tongue piece 4a punched and formed on the bottom plate 3.

Further, the contactor 11 provided in the blade receiving portion 10 is formed by inwardly folding back a protruding tongue piece 11a punched and formed at the base end of the bottom plate 3.

Therefore, the contacts 4 and 11 can be appropriately designed and changed in the length L direction according to the required bending amount and spring force, so that the blade-type fuse is downsized, and the blade terminal B and the bus bar of the fuse are fused. Even if the width of the blade terminal A becomes small, it can be pressed and held with a sufficient pressing force, and an intermediate connection terminal having stable electrical characteristics over time can be obtained.

[Effect of device]

According to the present invention, as described above, the contacts 4 and 11 formed in the blade receiving portion 2 and the blade receiving portion 10 have the required bending amount and spring force in the length L direction. Since the blade type fuse can be downsized and the width of the blade terminal B and the blade terminal A of the bus bar can be made small, there is no problem in designing the blade type fuse, and an excessive bending force is applied to the contact 4. When actuated, the free end tip 4b of the contactor 4 comes into contact with the step portion 5 formed by rolling the groove tip edge of the trace formed by punching the contactor 4 forward. Deformation is effectively prevented, and there is an excellent advantage that an intermediate connection terminal having stable electrical characteristics over time can be obtained.

[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 developed view, FIG. 4 is an explanatory view showing a state of use, and FIGS. FIG. 3 is a perspective view showing the intermediate connection terminal of FIG. 4 and an explanatory view showing its usage state. 1: Intermediate connection terminal, 2: Blade receiving part 3: Bottom plate, 4: Contact element 4a: Tongue piece 4b: Tip of free end of contact element, 5: Step part, 10: Blade receiving part, 11: Contact element

Claims (1)

[Scope of utility model registration request] 1. A tongue piece (4a) formed by punching on a bottom plate (3).
Is bent diagonally upward to form a contactor (4), and the groove tip edge of the mark after punching out the tongue (4a) is rolled forward so that the free end tip (4b) of the contactor (4) contacts. Step (5) which touches
And a blade receiving portion (2) formed by bending both sides of the bottom plate (3) into a rectangular tube shape so as to wrap around the contactor (4), and a bottom plate (continuous with the blade receiving portion (2) ( The protruding tongue piece (11a) punched out at the base end of 3) is folded back inward to form a contactor (11), and both sides of the bottom plate (3) are enclosed so as to wrap around the contactor (11). An intermediate connecting terminal, characterized in that a blade receiving portion (10) formed by bending it into a shape is continuously and integrally provided in the longitudinal direction.