WO2004047230A1

WO2004047230A1 - Connection terminal

Info

Publication number: WO2004047230A1
Application number: PCT/JP2003/014831
Authority: WO
Inventors: Yukifumi Machida; Shinji Yamaguchi; Hiroshi Isokawa
Original assignee: Ryosei Electro-Circuit Systems, Ltd.
Priority date: 2002-11-21
Filing date: 2003-11-20
Publication date: 2004-06-03

Abstract

A connection terminal, wherein a connection part (11) is formed in a generally box shape by bending a bottom plate (14), side plates (15) and (16) arranged continuously with both right and left sides of the bottom plate, and a top plate (17) arranged continuously with one side plate (15) to eliminate the possibility of buckling of a movable connection piece by stabilizing the insertion of a mating insert connection terminal and prevent the terminal connection part of the connection terminal from being deformed by maintaining a specified contact pressure, the base part of a strip-shaped movable contact piece (18) is provided at the front-side part of the side plate (16), and the movable contact piece (18) having an upper piece (18a) extended along the inside of the top plate (17), a lower piece (18b) bent at a bottom part and folded up, and a contact part (18c) formed at the top part of the lower piece (18b) swelled downward in a reverse-chevron shape near the inside center part of the connection part (11) is formed in a plate spring shape with a resiliency, and a fitting hole (18d) is provided in the base part of the upper piece (18a) so that a tapered free end (18e) at the tip of the lower piece (18b) can be fitted into the fitting hole (18d).

Description

Description book Connection terminal Technical field

The present invention relates to a female connection terminal electrically connected to a mating insertion connection terminal. Background art

Conventionally, this type of connection terminal has a connection portion for receiving the lead-in connection terminal on the other side in the front, and a wire crimping portion for joining the wire to the rear, and these are formed by bending one conductive metal plate. It is done.

FIG. 1 is a vertical cross-sectional view of a conventional connection terminal, in which 1 is a connection portion of the connection terminal, and 2 is a wire crimping portion. The connecting portion 1 has a bottom plate 3 having contact portions 3a which bulge inward, side plates 4 and 5 (5 is 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 is extended to the rear of the top plate 6, is folded in two, and is folded forward. It is done.

The movable contact piece 7 is formed in an inverted mountain shape in which the contact point 7c is at the top of the intermediate portion between the base 7a connected to the top plate 6 and the free end 7b. The free end 7b is the top plate 6 The sliding contact with the inner surface of the flat plate is made, and the flat blade-like connection portion of the mating lead-in connection terminal is inserted between the contact portion 7 c and the contact portion 3 a of the bottom plate 3. . Further, a projection 6 a is formed on the back side of the contact portion 7 c on the top plate 6 so that excessive deformation of the movable contact piece 7 is restricted. When the mating lead-in connection terminal (not shown) is inserted into the connection portion 1, the movable contact piece 7 is elastically deformed, and the flat blade-like connection portion of the lead-in connection terminal is pressed by the contact portion 7C. However, in the above-mentioned conventional example, especially when the other side of the lead-in connection terminal is inserted into the connection portion 1 in an oblique direction, etc., the inverted beveled slope of the movable contact piece 7 that contacts the tip of the lead-in connection terminal The frictional force generated during this acts to squeeze the movable contact piece 7 longitudinally, thereby increasing the slope of the slope of the movable contact piece 7. Therefore, the friction force is Further, smooth insertion of the lead-in connection terminal becomes difficult, which may cause the movable contact piece 7 to buckle.

Also, there are cases where a separate movable contact piece is housed in the connection part 1, but the processing steps are complicated, it is easy to move in the connection part 1, and the bonding with the lead connection terminal is good. There is also a possibility.

The object of the present invention is to solve the problems of the conventional example described above, to stabilize the insertion of the mating lead-in terminal, to reduce the frictional force at the time of terminal insertion, and to make the terminal connection An object of the present invention is to provide a connection terminal which is less likely to be deformed. Disclosure of the invention

In order to achieve the above object, the connection terminal according to the present invention is formed by punching and bending a conductive metal plate, providing a connection portion for receiving the mating lead connection terminal on the front, and an electric wire on the rear The connection portion is formed in a substantially box shape surrounded by a bottom plate, side plates continuously provided on both left and right sides thereof, and a top plate continuously provided on one side plate, In the connection terminal in which the movable contact piece attached to the front side portion of the side plate of the upper and lower pieces is folded by a bending portion and disposed in the connection portion, the movable contact piece The lower piece is folded back in a hairpin shape with the free end of the lower piece facing forward, and the free end can be inserted into a fitting hole provided near the base of the upper piece. I assume. Brief description of the drawings

FIG. 1 is a longitudinal sectional view of a conventional connection terminal.

FIG. 2 is a developed plan view of the connection terminal of the first embodiment.

FIG. 3 is a longitudinal sectional view of the connection terminal.

FIG. 4 is a longitudinal sectional view of the inserted state of the mating connection end.

FIG. 5 is a longitudinal sectional view of the inserted state of the mating connection end.

FIG. 6 is a developed plan view of the second embodiment.

FIG. 7 is a longitudinal sectional view of the main part.

FIG. 8 is a cross-sectional view. W 200 Fig. 9 is a bottom view.

FIG. 10 is an explanatory view of processing of the connecting piece.

FIG. 11 is a developed plan view of the third embodiment.

Figure 12 is a side view. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 2 is a developed plan view of the connection terminal of the first embodiment, and FIG. 3 is a longitudinal sectional view. As shown in Fig. 2, all the parts including the connection terminal 1 for receiving the mating lead connection terminal 1, the middle swipe breaker 12 and the rear wire crimping part 13 are shown in Fig. 2. The plate is punched and then bent as shown in FIG.

As shown by the alternate long and short dash line in FIG. 2, the connection portion 11 is a plate 14, side plates 15 and 16 connected to both left and right sides thereof, and a top plate 17 connected to one side plate 15. It is bent to form a substantially box shape. The bottom plate 14 is provided with a contact portion 14 a that bulges inward. The base of the strip-like movable contact piece 18 is attached to the front side of the other side plate 16, and the movable contact piece 18 is an upper piece 18 a along the inside of the top plate 17 and The lower part is composed of a lower piece 18 b that is bent at the back and turned forward in a hairpin shape. Then, a contact portion 18 c is provided on the top of the lower piece 18 b which is downwardly bulged near the central portion in the connection portion 11 and is formed into an inverted mountain shape, and is formed into a leaf spring shape having a flexibility. There is.

The base of the upper piece 18a is provided with an insertion hole 18d, and the tapered free end 18e of the lower end of the lower piece 18b can be inserted into the insertion hole 18d. . In addition, a pressing piece 18 f extending forward from the upper piece 18 a to the opposite side to the free end 18 e is bent in an arc shape inward of the connecting portion 11 to be a guide portion. The free end 18 e is always located inside this presser foot 18 f. Further, wings 18g are provided on both sides of the lower piece 18b so as to project into hooks 15a and 16a provided in the side plates 15 and 16 so as to be locked. There is.

The side 17a extending rearward of the top 17 is bent inwardly, and a locking lance provided on the housing serves as a locking portion for locking.

This connection terminal is formed by punching and bending through a large number of steps by a forming press using a single strip metal plate as described above. Is inserted into place during the assembly process of the connection 11.

After connecting the electric wire to the electric wire crimping part 13 of the completed connection terminal, the connection terminal is inserted into the synthetic resin housing. At this time, the locking lever of the housing is locked to the side 17a, and the tip of the connection portion 11 is locked to the tip locking portion of the housing, and the stabilizer 12 is in the predetermined position of the housing. By fitting, the connection terminal is stably fixed in the housing, the connection terminal is prevented from coming off in the longitudinal direction with respect to the housing, and the posture is stabilized.

In this connection terminal, in particular, the free end 18e of the movable contact piece 18 can be fitted into the insertion hole 18d of the base of the upper piece 18a as shown by the dashed dotted line in FIG. As shown in Fig. 4, the flat blade-like connection end T of the mating lead-in connection terminal is the contact portion 1 c of the flat spring-like contact portion 1 8 c of the movable contact piece 1 8 and the bottom plate 1 4 When an upward force is applied to the movable contact piece 18 from the lead-in connection terminal when it is inserted and fitted between the two, the free end 1 8 e is inserted between the insertion holes 1 8 d and the free end 1 8 The position of e is fixed, and the lower piece 18 b does not move in the back and forth direction.

That is, when the flat blade-like connection end T is further inserted as shown in FIG. 5, the push-up force is also transmitted to the upper piece 18a via the rear bent portion, and the lower piece 18b and the upper portion The movable contact piece 18 is flexibly deformed so that the gap between the piece 18a and the upper piece 18a and the top plate 17 becomes smaller, and the pressing force against the flat blade-like connecting end T is substantially constant. And the input is stable.

In the state of FIG. 5 in which the flat blade-like connection end T has been completely inserted into the connection portion 11, the flat blade-like connection end T is the contact portion between the contact portion 18c of the lower piece 18b and the bottom plate 14 It is held with stable force between 14 a and secure electrical connection is obtained.

In the case of a multi-pole connector in which a large number of connection terminals are accommodated in the same housing, the use of the connection terminals according to the present embodiment reduces variations in the 揷 input of the lead-in connection terminals. Becomes more pronounced.

6 is a developed plan view of the connection terminal according to the second embodiment, FIG. 7 is a longitudinal sectional view of an essential part, FIG. 8 is a cross sectional view, and FIG. 9 is a bottom view. In the front of the connection terminal, a connection portion 21 for receiving the male terminal on the other side is provided, and in the rear, a wire crimping portion 23 is provided. The connection portion 21 is a bottom plate 24 and side plates 25 bent upward from both sides of the bottom plate 24, It is formed in a square tube shape by 26 and a top plate 27 bent inward from one side plate 25.

Further, a movable contact piece 28 is attached to the side of the other side plate 26. The movable contact piece 28 is folded in half in the connecting portion 21 and the free end 28e is folded forward. It consists of an upper side 2 8 a along the inside of the top plate 7 and a lower piece 2 8 b bent at the back and folded back in a hairpin shape. A free end 28e is inserted into the base of the upper piece 28a, and an insertion hole 28d is provided. The contact piece 2 8 c is provided in the vicinity of the central portion of the lower piece 2 8 b, and the wings 2 8 g are provided on both sides, and the wings 2 8 g are formed on the side plates 25 and 26 The holes 25a, 26a are locked. In addition, the pressing piece 2 8 extended to the opposite side of the base of the movable contact piece 2 8 is folded back so as to close the entrance of the connection portion 2 1 and is used as a guide portion for the mating connection terminal. , The movable contact piece 2 8 is designed to hold the tapered free end 2 8 e.

A connecting piece 29 is extended at the rear of the top plate 27. The tip of the connecting piece 29 is a narrow hooking piece 29a. Further, a hole 24b is cut out in the bottom plate 24, and a strip 24c is often formed so as to cross the hole 24b in the lateral direction. The hooking piece 2 9 a of the connecting piece 2 9 is hooked onto the strip portion 2 4 c so as to be wound from the lower side. This hooking is performed by bending the connecting piece 29 and the hooking piece 2 9 a as shown in FIG. 10 after forming the connecting portion 21 in a square tube shape.

When the flat blade-like connection end of the mating male connection terminal is inserted into the connection portion 21 formed in this way, the connection end is a movable contact piece 2 bent in a “く” shape. It is elastically interposed between the top of the plate 8 and the contact portion 2 4 a of the bottom plate 24 and electrical conduction is achieved by the same function as in the first embodiment. In this process, the connection end on the other side may be forcibly pressed and a prying force may act, but there is little risk that the rectangular tube type of the connection portion 21 will be deformed by the presence of the connection piece 29. That is, even if a force to lift the top plate 27 is applied, the top plate 27 is fixed to the bottom plate 24 at the rear via the connection piece 29 so that the top plate 27 is separated. There is no chance that the connection 21 will be deformed.

FIG. 11 is a developed plan view of the third embodiment, and FIG. 12 is a side view. Connecting pieces 41, 42 extend forward and backward from the front end and the rear end of the top plate 37, respectively. In front of the connection terminal, there is provided a connection 31 for receiving the other male terminal. The connection portion 31 is bent inward from the bottom plate 34, the side plates 35 and 36 bent upward from both sides of the bottom plate 34, and one side plate 35. It is formed in a square tube shape by the top plate 37.

A movable contact piece 38 is attached to the side of the other side plate 36. The movable contact piece 38 is folded in half by the upper piece 38a and the upper piece 38b in the connecting portion 31. , Free end 3 8 e is folded forward. On both sides on the free end side of the movable contact piece 38, wings 38g are provided, and in the base of the upper piece 38a, an insertion hole 38d is formed. The connecting pieces 4 1 and 4 2 are provided with tongue pieces 4 1 a and 4 2 a respectively toward the other side, and the side plate 36 is cut into which the tongue pieces 4 1 a and 4 2 a are inserted. 36 b and 36 c are provided, and the notch 36 b is provided at a relatively upper portion of the side plate 36 and the notch 36 c at a lower portion. 'And the connecting pieces 4 1 and 4 2 are bent downward, and the connecting piece 4 1 covers the upper part of the inlet of the connecting part 31 and serves as a guide part, and the tongue 4 la is a side plate 36 The notch is fitted in 3 6 b. Also, the connecting piece 42 is bent so as to close the rear of the connecting portion 31 and the tongue piece 4 2 a is fitted in the notch 3 6 c.

As described above, in the third embodiment, since the connection pieces 4 1 and 4 2 extended from the top plate 3 7 are engaged with the notches 3 6 b and 3 6 c provided on the side plate 36, respectively. Even if the prying force of the mating male terminal acts in the vertical direction, they do not break apart, and the connecting portion 31 does not deform.

In the second and third embodiments, since the rear openings of the connection portions 2 1 and 3 1 are closed by the connection pieces 2 9 and 2 4 and 2 2, foreign matter is mixed from the rear side. And can be prevented. Industrial applicability

As described above, the connection terminal according to the present invention weakens the spring property of the movable contact piece when inserting the mating lead-in connection terminal, and after the posture becomes constant, a predetermined pressure contact force is used. , The other side connection terminal can be inserted at low input, enabling stable and smooth insertion operation.

In addition, if part of the top plate of the terminal connection part is connected to the bottom plate or side plate, _T capable of preventing deformation of the terminal connector according to Jiri force

Claims

The scope of the claims

1. A conductive metal plate is punched and bent to form a connecting portion for receiving the mating lead connection terminal in the front, and an electric wire crimping portion for connecting the electric wire in the rear, and the connecting portion is a bottom plate The side plate continuously connected to both left and right sides and the top plate continuously connected to one side plate are formed in a substantially box shape, and the movable contact piece attached to the front side of one side plate is bent by a bending portion. In the connection terminal disposed in the connecting portion by folding the upper piece and the lower piece in two, the movable contact piece arranges the upper piece in the back direction along the top plate, and the lower piece as well. A connection terminal characterized in that a free end is turned forward in a hairpin shape, and the free end can be inserted into a hole provided near the base of the upper piece.

2. The connection terminal according to claim 1, wherein the vicinity of the base of the upper piece is in contact with the inner surface of the top plate.

3. The connection terminal according to claim 1, wherein the lower piece is provided with a contact portion whose top is directed downward.

4. The connection terminal according to claim 1, wherein a front end portion of the upper piece opposite to the bent portion extends forward and is bent downward to form a guide portion.

5. The connection according to claim 1, wherein a connection piece is extended to the rear of the top plate, the connection piece is bent downward, and a part is connected to a part of the bottom plate or a part of the side plate. Terminal.

6. The connection terminal according to claim 5, wherein the connection piece is connected to a cut portion formed by punching out on the bottom plate.

7. The connection terminal according to claim 5, wherein the connection piece is connected to a cut portion formed by punching out the second side plate.

8. The connection terminal according to claim 1, wherein a connection piece is extended to the front of the top plate, and a part of the connection piece is connected to a part of the side plate.