JP2004172000A - Connection terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize the insertion of a mating insertion connection terminal; to eliminate a risk of buckling of a moving contact piece; and to keep desired contact pressure. <P>SOLUTION: A connection part 11 is formed into a nearly box-like shape by bending a bottom plate 14, side plates 15 formed continuously on both its left and right sides, and a top plate 17 formed continuously on one of the side plates 15. The base part of the linear piece-shaped moving contact piece 18 is attached to the front side part of the side plate 15. The contact piece 18 has: an upper piece 18a along the inside of the top plate 17; a lower piece 18b bent in the deep part and folded back to the front side; and a contact part 18c swelling downward in the vicinity of the center part in the connection part 11 to be formed into an inverted mountain-like shape, and formed at the top part of the lower piece 18b; and is shaped into the form of a plate spring having elasticity. A mounting hole 18d is formed in the base part of the upper piece 18a, and a free end 18e at the tip of the lower piece 18b can be inserted into the mounting hole 18d. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a female connection terminal electrically connected to a mating insertion connection terminal.
[0002]
[Prior art]
Conventionally, this type of connection terminal has a connection portion for receiving a mating insertion connection terminal at the front, and a wire crimping portion for joining an electric wire at the rear, and these are formed by bending a single conductive metal plate. ing.
[0003]
FIG. 5 is a longitudinal sectional view of a conventional connection terminal, wherein 1 is a connection portion of the connection terminal, and 2 is a wire crimping portion. The connection portion 1 is surrounded by a bottom plate 3 having a contact portion 3a bulging inward, side plates 4 and 5 (5 not shown) connected to both left and right sides thereof, and a top plate 6 connected to one side plate 4. The movable contact piece 7 is disposed inside the connection portion 1, and the movable contact piece 7 extends behind the top plate 6, is folded in two, and is folded forward. .
[0004]
The movable contact piece 7 is formed in an inverted mountain shape with a vertex of an intermediate portion between the base 7a connected to the top plate 6 and the free end 7b as a contact portion 7c, and the free end 7b slides on the inner surface of the top plate 6. The flat blade-shaped connection portion of the mating insertion connection terminal is inserted between the contact portion 7c and the contact portion 3a of the bottom plate 3 freely. Further, a projection 6a is formed on the top plate 6 on the back side of the contact portion 7c, so that excessive deformation of the movable contact piece 7 is restricted.
[0005]
When a mating insertion connection terminal (not shown) is inserted into the connection portion 1, the movable contact piece 7 is elastically deformed, and the contact portion 7c presses the flat blade-shaped connection portion of the insertion connection terminal.
[0006]
[Problems to be solved by the invention]
However, in the conventional example described above, especially when the insertion connection terminal on the other side is inserted into the connection portion 1 from an oblique direction, the inverted contact-shaped slope of the movable contact piece 7 with which the tip of the insertion connection terminal comes into contact. Acts to compress the movable contact piece 7 in the longitudinal direction and increases the inclination of the slope of the movable contact piece 7. Therefore, the frictional force is further increased, and it is difficult to smoothly insert the insertion connection terminal, and the movable contact piece 7 may be buckled.
[0007]
In particular, in the case of a multipolar connector in which a large number of connection terminals are housed in the same housing, if any of the insertion connection terminals cannot be inserted due to frictional resistance, insertion of the entire insertion connection terminal becomes impossible. There is a fear.
[0008]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a connection terminal which solves the above-mentioned problems of the conventional example, stabilizes insertion of a mating insertion connection terminal, and reduces frictional force when the terminal is inserted.
[0009]
[Means for Solving the Problems]
A connection terminal according to the present invention for achieving the above object is formed by punching and bending a conductive metal plate, providing a connection portion for receiving a mating insertion connection terminal in the front, and connecting an electric wire in the rear. The connection portion is formed in a substantially box shape surrounded by a bottom plate, a side plate connected to both left and right sides thereof, and a top plate connected to one side plate, and is formed in front of one side plate. In a connection terminal in which a movable contact piece attached to a side portion is folded into an upper piece and a lower piece by a bent portion and arranged in the connection portion, the movable contact piece moves the upper piece along the top plate in a depth direction. And the lower piece is folded back into a hairpin shape with its free end facing forward, so that the free end can be fitted into a mounting hole provided at the base of the upper piece.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described in detail based on the embodiments shown in FIGS.
FIG. 1 is a developed view of the connection terminal, and FIG. 2 is a longitudinal sectional view. As for the connection terminal, all parts including the connection part 11 for receiving the mating insertion connection terminal, the intermediate stabilizer 12, and the rear wire crimping part 13 are punched out of a conductive metal plate as shown in FIG. As shown in FIG.
[0011]
The connecting portion 11 is formed by bending a bottom plate 14, side plates 15 and 16 connected to both right and left sides thereof, and a top plate 17 connected to one side plate 15 as shown by a dashed line in FIG. Is formed. The bottom plate 14 is provided with a contact portion 14a that bulges inward. A base of a strip-shaped movable contact piece 18 is attached to the front side of the side plate 16, and the movable contact piece 18 is bent at an inner portion of the top plate 17, and is bent at a back portion to be forward. And a lower piece 18b folded back into a hairpin shape. The contact portion 18c is provided on the top of the lower piece 18b, which bulges downward near the center of the connecting portion 11 and is shaped like an inverted mountain, and has a resilient leaf spring shape.
[0012]
A mounting hole 18d is provided at the base of the upper piece 18a, and a tapered free end 18e at the tip of the lower piece 18b can be fitted into the mounting hole 18d. A distal end 18f extending forward from the upper piece 18a on the side opposite to the free end 18e is bent inward in an arc shape to serve as a guide. It is located inside the portion 18f. Further, wing portions 18g are protrudingly provided on both sides of the lower piece 18b so as to be locked in the locking holes 15a, 16b provided in the side plates 15, 16.
[0013]
A side portion 17a extending rearward of the top plate 17 is bent inward to form a locking portion for locking a locking lance provided on the housing.
[0014]
The connecting terminal is formed by punching and bending using a single band-shaped metal plate through a number of steps using a forming press, and the movable contact piece 18 is inserted into a predetermined position during the assembly process of the connecting portion 11. Is done.
[0015]
After connecting the electric wire to the wire crimping portion 13 of the completed connection terminal, the connection terminal is inserted into a synthetic resin housing. At this time, the locking lance of the housing is locked to the side portion 17a, the distal end of the connecting portion 11 is locked to the distal locking portion of the housing, and the stabilizer 12 is fitted to a predetermined position of the housing, so that the connection is established. The terminal is fixed in the housing, and the connection terminal is prevented from coming out of the housing in the front-rear direction, and the posture is stabilized.
[0016]
In this connection terminal, particularly, the free end 18e of the movable contact piece 18 can be fitted into the mounting hole 18d at the base of the upper piece 18a as shown by the dashed line in FIG. When the flat blade-shaped connection end T of the mating insertion connection terminal is inserted between the leaf spring-shaped contact portion 18c of the movable contact piece 18 and the contact portion 14a of the bottom plate 14 and fitted, When a lifting force is applied to the movable contact piece 18 from the connection terminal, the free end 18e is fitted between the mounting holes 18, the position of the free end 18e is fixed, and the lower piece 17b does not move in the front-rear direction.
[0017]
That is, when the flat blade-shaped connection end T is further inserted as shown in FIG. 4, the pushing force is also transmitted to the upper piece 18a via the rear bent portion, and the lower piece 18b and the upper piece 18a are connected to each other. The movable contact piece 18 is flexibly deformed so that the gap and the gap between the upper piece 18a and the top plate 17 are reduced, and the pressing force against the flat blade-shaped connection end T is substantially constant, and the insertion force is stabilized.
[0018]
In the state shown in FIG. 4 in which the flat blade-shaped connection end T has been inserted into the connection portion 11, the flat blade-shaped connection end T is stable between the contact portion 18c of the lower piece 18b and the contact portion 14a of the bottom plate 14. And a reliable electrical connection is obtained.
[0019]
In the case of a multipolar connector in which a large number of connection terminals are housed in the same housing, the use of the connection terminals according to the present invention reduces the variation in insertion force of the insertion connection terminals, and the effect is more remarkable. It becomes.
[0020]
【The invention's effect】
As described above, the connection terminal according to the present invention weakens the spring property of the movable contact piece when inserting the mating insertion connection terminal, and has a predetermined pressure contact force after the posture becomes constant, The mating connection terminal can be inserted with a low insertion force, thereby enabling a stable and smooth insertion operation.
[Brief description of the drawings]
FIG. 1 is a development view of a connection terminal.
FIG. 2 is a longitudinal sectional view of a connection terminal.
FIG. 3 is a longitudinal sectional view showing a state where a mating connection end is inserted.
FIG. 4 is a longitudinal sectional view showing a state where a mating connection end is inserted.
FIG. 5 is a longitudinal sectional view of a connection terminal of a conventional example.
[Explanation of symbols]
11 connection part 13 wire crimping part 14 bottom plate 15, 16 side plate 17 top plate 18 movable contact piece 18a upper piece 18b lower piece 18c contact part 18d mounting hole 18e free end

Claims (4)

A conductive metal plate is formed by punching and bending, a connecting portion for receiving a mating insertion connection terminal is provided in the front, and an electric wire crimping portion for connecting an electric wire is provided in the rear, and the connecting portion is a bottom plate. Formed in a substantially box shape surrounded by side plates connected to both left and right sides and a top plate connected to one side plate, and a movable contact piece attached to the front side of one side plate is an upper piece by a bent portion, In the connection terminal arranged in the connection portion by folding the lower piece in half, the movable contact piece arranges the upper piece in the depth direction along the top plate, and moves the lower piece forward with its free end forward. A connection terminal, wherein the connection terminal is folded back in a hairpin shape so that the free end can be fitted into a mounting hole provided in a base of the upper piece. The connection terminal according to claim 1, wherein a vicinity of a base of the upper piece is brought into contact with an inner surface of the top plate. The connection terminal according to claim 1, wherein a contact portion having a top portion directed downward is provided on the lower piece. The connection terminal according to claim 1, wherein a front end of the upper piece opposite to the bent portion extends forward and is bent downward to form a guide portion.

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