JPH05251156A - Electric connecting piece and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide an electric connecting piece, which eliminates easy generation of the torsional deformation of a joining piece to set a plate spring at a normal position inside an electric connecting piece and which can improve the working efficiency of the assembling of the plate spring and which can prevent the decrease of a lifetime of a cutting blade for cutting a connecting piece and which eliminates the generation of cutting burr, and provide the manufacturing method thereof. CONSTITUTION:In the manufacture of an electric connecting piece, a plate spring 4 connected to a chain band through a joining piece 5 is set inside of an electric contact part 2 for receiving a male terminal, and the joining piece 5 is cut to separate the plate spring 4 from the chain band, and while locking pieces projecting from both sides in the width direction of the plate spring 4 are inserted into locking holes 2a provided in both side walls 2b of the electric contact part 2 to install the plate spring 4 to the electric contact part 2. Two joining pieces 5 are provided with the same as the full width of the plate spring 4 to improve the torsional rigidity of the joining piece 5 part and improve the inserting accuracy of the locking pieces to the locking holes 2a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a leaf spring arranged in an electric contact portion to increase a contact pressure against a male terminal.
The present invention relates to a so-called two-part electrical connector manufacturing method and an electrical connector.

[0002]

2. Description of the Related Art As an electrical connector of this type, for example, as shown in FIG. 11, a leaf spring 20 made of a highly elastic material such as beryllium copper or phosphor bronze is provided on one end side in the longitudinal direction of the electrical connector. And a locking piece 2 formed on both sides of one end in the longitudinal direction of the leaf spring 20 in locking holes 21a formed on both sides of the electric contact portion 21 and incorporated in the box-shaped electric contact portion 21.
It is known that 0a and 20a are locked.

At the time of assembling this electric connector, the leaf spring 20 connected to the chain band 22 via the connecting piece 23 (see FIG. 12).
(Refer to FIG. 2) is set in the electric contact portion 21 which is also connected to a chain band (not shown) and is in a half-folded state, and then cut at the connecting piece 23 to thereby set the leaf spring 20 to the chain band 22.
And then separate the locking pieces 20a, 20a into the locking holes 2
The electric contact portion 21 is completely bent into a box shape by being locked to 1a and 21a.

As described above, the leaf spring 20 is connected to the chain band 22 because the leaf spring 20 is a very small component and it is difficult to handle each piece individually. This is because automatic assembling can be easily performed by winding it and pulling it out of the reel and sending it to the machine at the time of assembling. The electric contact portion 21 is also connected to a chain band (not shown) for the same reason.

[0005]

However, since the connecting piece 23 has a narrow width and is provided at the central portion of one end of the leaf spring 20 in the longitudinal direction, when the chain belt 22 is wound around the reel or pulled out from the reel. Or, there is a possibility that the twisted deformation is easily caused by an external force, entanglement, or the like generated when the reel is transferred. When the connecting piece 23 is twisted and deformed, the leaf spring 20 is twisted with respect to the chain band 22. As a result, as shown in FIGS. There is a problem in that the locking piece 20a is not set to the position and the locking piece 20a cannot be inserted into the locking hole 21a.

As a means for solving this problem, for example, it is possible to make the width of the connecting piece 23 as wide as the width of the leaf spring 20. In this way, the connecting piece 23
However, there is no possibility of being easily twisted and deformed due to the above-mentioned cause, it is possible to eliminate the defect that the leaf spring 20 is not set at the regular position of the electric contact portion 21, and it is possible to improve the work efficiency of assembling the leaf spring 20. Become.

However, the connecting piece 23 is a portion to be cut in a later step, and making the width wider unnecessarily means increasing the wear of the cutting blade and shortening the life of the cutting blade. Occurs. Further, when the cutting operation is performed in a state where the cutting blade is worn, a cutting burr is generated at one longitudinal end (on the male terminal insertion side) of the leaf spring 20, which causes an unfavorable situation in terms of quality.

The present invention has been made in order to solve the above-mentioned problems of the prior art. The object of the present invention is to eliminate the possibility that the connecting piece is easily twisted and deformed so that the leaf spring is formed in the normal contact portion. Can be easily set at the position of, and the work efficiency of assembling the leaf spring can be improved, and the life of the cutting blade for cutting the connecting piece is not shortened,
An object of the present invention is to provide a method for manufacturing an electrical connector and an electrical connector that can eliminate the possibility of cutting burrs.

[0009]

To achieve the above object, the invention of claim 1 sets a leaf spring connected to a chain band through a connecting piece in an electric contact portion for receiving a male terminal, By cutting the connecting piece to separate the leaf spring from the chain band, and inserting the engaging pieces protruding from both sides in the width direction of the leaf spring into the engaging holes provided on both side walls of the electric contact portion, A method for manufacturing an electrical connector in which a spring is attached to an electrical contact portion, wherein the connecting piece is provided with two spaced apart at the full width of the leaf spring, thereby improving the torsional rigidity of the connecting piece portion. The insertion accuracy of the locking piece into the locking hole is improved.

The invention according to claim 2 is a leaf spring connected to a chain belt via a connecting piece, and has a disconnecting portion of the connecting piece that remains when the connecting piece is cut, and A leaf spring having locking portions protruding from both sides in the width direction, and a tubular electric contact portion having a quadrangular cross section for receiving the male terminal,
The leaf spring is disposed on the bottom plate, and electrical contact portions having locking holes into which the locking pieces are inserted are provided on the left and right side walls, and the cut end face of the disconnecting portion is inserted into the male terminal of the bottom plate. An electric connector arranged at the opening end on the side, the two separating portions are provided at intervals with the full width of the leaf spring, and the bottom plate is provided with each of the opening end portions from the opening end portion. It is characterized in that it has a tongue piece that is bent over the leaf spring so as to pass through between the separating portions.

[0011]

According to the invention of claim 1, since the two connecting pieces are provided so as to be spaced over the width of the leaf spring, it is assumed that two connecting pieces are provided. Is the maximum. That is, since the torsional rigidity of the connecting piece portion is maximized, the connecting piece portion is twisted by an external force, entanglement, or the like generated when the chain belt is wound around the reel, pulled out from the reel, or transferred from the reel. Also, the torsional deformation of the connecting piece portion can be suppressed to an extremely small value. Therefore, if the leaf spring connected to the chain is set in the electric contact portion, the leaf spring is set at the proper position in the electric contact portion every time, and the locking piece of the leaf spring is engaged with the electric contact portion. It will be surely inserted into the stop hole.

Further, the polar moment of area of the connecting piece portion can be remarkably increased as compared with the conventional case in which the connecting piece is provided at the central portion in the width direction of the leaf spring. Can be smaller. Therefore,
The cutting resistance of the connecting piece can be reduced, the wear of the cutting blade can be reduced, and the burr of the connecting piece due to the reduction in the sharpness of the cutting blade can be reduced.

Further, in the invention of claim 2, in addition to the above-mentioned action, since the connecting piece is cut so that the separating portion remains on the leaf spring side, the cutting position does not cut into the leaf spring side. The leaf spring always has a constant spring force. Furthermore, since the tongue piece is provided between the separating portions, the male terminal can be guided into the electric contact portion by the tongue piece. That is, by arranging the leaf spring on the bottom plate of the electric contact portion, the end portion of the leaf spring between the disconnecting portions becomes stepwise with respect to the bottom plate, and this step portion inserts the male terminal into the electric contact portion. However, since the step portion is covered with the tongue piece, the male terminal can smoothly enter the electric contact portion along the tongue piece.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

Reference numeral 1 in FIGS. 1, 2 and 3 is a connector. This connector 1 is made of a press-molded body such as brass,
A box-shaped, that is, a tubular electric contact portion 2 having a quadrangular cross section is formed on one end side in the longitudinal direction, and an electric wire crimp portion 3 including a plurality of upstanding pieces 3a and 3b is formed on the other end side.

In the electric contact portion 2, beryllium copper,
An arc-shaped leaf spring 4 made of a highly elastic material such as phosphor bronze is incorporated, and a male terminal (not shown) is connected to the electrical contact portion 2.
When inserted into the inside, the male terminal is sandwiched between the outer surface of the leaf spring 4 and the inner surface of the upper wall 2d of the electrical contact portion 2, and a good electrical connection can be obtained by a large contact pressure.

The leaf spring 4 is, as shown in FIGS. 4 and 5,
The position of the connecting pieces 5 and 5 connected to the chain band 6 by two connecting pieces 5 and 5 extending along the longitudinal direction of the plate spring 4 and provided at intervals L that are the full width of the plate spring 4. Disconnecting part 5 of the connecting pieces 5, 5 remaining on the leaf spring 4 side after cutting with
a, 5a. Then, the leaf spring 4 connects the cut surfaces of the separating portions 5a and 5a to the bottom plate 2c of the electric contact portion 2.
It is arranged on the bottom plate 2c so as to match the opening end of the male terminal insertion side.

As described above, in the structure in which two connecting pieces 5 extending in the longitudinal direction of the leaf spring 4 are provided at an interval L that is the full width of the leaf spring 4, the two connecting pieces 5 are connected together. The polar moment of area of the pieces 5 and 5 is maximized. That is, since the torsional rigidity of the portions of the connecting pieces 5 and 5 is maximized, external force, entanglement, etc. generated when the chain belt 6 is wound around the reel (not shown), pulled out from the reel, or when the reel is transferred. As a result, the connecting piece 5 is less likely to be twisted and deformed, so that the leaf spring 4 is not twisted with respect to the chain band 6, and when assembled in the electrical contact portion 2,
The electric contact portion 2 can be easily set to the regular position.

Here, the interval L of the full width of the leaf spring 4 is
It means the maximum distance where the two connecting pieces 5 and 5 do not protrude from the width W of the leaf spring 4. The two connecting pieces 5 and 5 are leaf springs 4.
If the blade spring 4 largely protrudes from the width W of the
When assembled in the inside, the connecting pieces 5 and 5 are attached to the side wall 2 of the electrical contact portion 2.
This is because it is not preferable because it is caught by b.

Therefore, as shown in FIG. 4, it is desirable to set the interval L so that the connecting piece 5 is located on the extension line of the side edge of the leaf spring 4. Further, depending on the distance L, the connecting piece 5,
Since 5 can have the strongest structure against torsion, the total cross-sectional area of the two connecting pieces 5 and 5 can be set smaller than the cross-sectional area of the conventional connecting piece 23 (see FIG. 12). .. This is because the material at the center of the twist hardly contributes to the increase of the polar moment of area, but the material away from the center significantly contributes to the increase of the polar moment of area. That is, the polar moment of area increases in proportion to the square of the distance from the center.

As described above, the total cross-sectional area of the two connecting pieces 5, 5 can be set smaller than that of the conventional connecting piece 23, so that a cutting blade (not shown) for cutting the connecting piece 5 is used. ) Is less burdensome.

On both sides of one end of the leaf spring 4 in the longitudinal direction (on the side of the connecting piece 5), tapered locking pieces 4a, 4a which are gradually narrowed in width as they protrude from both sides are integrally formed. There is. Further, a locking hole 2a (see FIG. 1) for locking the locking piece 4a from the side wall 2b to the bottom plate 2c is provided on one end side in the longitudinal direction of the electric contact portion 2. Therefore, by inserting the locking piece 4a into the locking hole 2a, it is possible to prevent the leaf spring 4 from coming off the electric contact portion 2. Further, the other longitudinal end portion 4b of the leaf spring 4 is free from the bottom plate 2c of the electric contact portion 2 (see FIG. 2).
When the male terminal is inserted, the electrical contact portion 2 bends to the other end portion in the longitudinal direction (the wire crimping portion 3 side).

Further, in this embodiment, a tongue piece 2e having substantially the same width as the space L is integrally provided at one end edge (opening end) in the longitudinal direction of the bottom plate 2c so as to project from the electric contact portion 2. The leaf spring 4 and then the tongue piece 2e
Is located between the respective cut-off portions 5a of the interval L and is folded back so that the tip end thereof rests on one end of the leaf spring 4, thereby forming the male terminal guide 7. This guide 7 can reduce the insertion force of the male terminal and can make the insertion smooth.

Here, the distance L has the effect of facilitating the formation of the male terminal guide 7 in addition to making it difficult for the connecting piece 5 to be twisted and deformed as described above.

6 to 10 show a process of assembling the electric connector. The chain belt 6 is wound around a reel (not shown) in advance, and is pulled out from the reel during assembly. In order to assemble the leaf spring 4 connected to the chain band 6 via the connecting pieces 5 and 5 into the electric contact portion 2, first, referring to FIG.
As shown in (a) and (A), the leaf spring 4 is transferred together with the chain band 6 onto the electric contact portion 2 in the semi-assembled state in which the upper wall 2d is opened. Since the connecting piece 5 has a structure that is strong against twisting, there is no risk of twisting deformation when the connecting piece 5 is pulled out from the reel or transferred. Therefore, there is no possibility that the leaf spring 4 will also be twisted with respect to the chain band 6.

Next, as shown in FIGS. 7B and 7B, the leaf spring 4 and a part of the connecting piece 5 are set in the electric contact portion 2 from the opened upper wall 2d. At this time, the leaf spring 4 is set at a regular position in the electric contact portion 2, and
As shown in (a) and (b), it is not inclined or biased to one side.

Next, as shown in FIGS. 8C and 8C, the connecting pieces 5 and 5 are cut to separate the leaf spring 4 from the chain band 6. At this time, a part of the connecting piece 5 remains as a part of the leaf spring 4 as the separating part 5a, and the other part is discarded together with the chain band 6.

Thereafter, FIGS. 9D and 9D and FIG.
As shown in (e) and (E), the side wall 2b is bent at a substantially right angle to close the upper wall 2d. The locking piece 4a completely enters the locking hole 2a in the process of bending the side wall 2b at a right angle. In this way, the electrical connector shown in FIGS. 1, 2 and 3 is assembled.

6 to 10, the tongue piece 2e serving as the guide 7 for the male terminal is omitted.

Regarding the method of assembling the electric connector,
It is not limited to the method shown in FIGS.

[0031]

According to the first aspect of the present invention, since two connecting pieces are provided so as to be spaced apart over the width of the leaf spring, it is assumed that two connecting pieces are provided and the cross section of the connecting piece portion is provided. You can maximize the maximum momentum. That is, since the torsional rigidity of the connecting piece portion is maximized, the connecting piece portion acts to be twisted by external force, entanglement, or the like generated when the chain band is wound around the reel, separated from the reel, or when the reel is transferred. However, the twisting deformation of the connecting piece portion can be suppressed to an extremely small value. That is, it is possible to reliably set the leaf spring connected to the chain band at a regular position in the electric contact portion each time, and to reliably insert the locking piece of the leaf spring into the locking hole of the electric contact portion. it can. Therefore, the work efficiency of assembling the leaf spring can be improved.

Further, since the space between the connecting pieces hardly contributes to the increase of the polar moment of area, no problem arises by providing this space, and the cutting area of the connecting piece is reduced. Therefore, the cutting resistance of the connecting piece can be reduced. Therefore, it is possible to reduce the abrasion of the cutting blade and reduce the burr of the connecting piece that is caused by the deterioration of the cutting edge.

Further, in the invention of claim 2, in addition to the above-mentioned function and effect, since the connecting piece is cut so that the separating portion remains on the leaf spring side, the cutting position may cut into the leaf spring side. Instead, it is possible to provide a leaf spring having a constant spring force. Furthermore, since the tongue piece is provided between the separating portions, the male terminal can be guided into the electric contact portion by the tongue piece.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric connector shown as an embodiment of the present invention.

FIG. 2 is a sectional view of the electric connector.

FIG. 3 is an end view of the electric connector.

FIG. 4 is a plan view of the leaf spring before the electric connector is incorporated.

FIG. 5 is a side view of the leaf spring before the electric connector is incorporated.

FIG. 6 is an explanatory view showing a process of assembling the electric connector.

FIG. 7 is an explanatory view showing a process of assembling the electric connector.

FIG. 8 is an explanatory view showing a process of assembling the electric connector.

FIG. 9 is an explanatory view showing a process of assembling the electric connector.

FIG. 10 is an explanatory view showing a process of assembling the electric connector.

FIG. 11 is a perspective view of a connector shown as a conventional example.

FIG. 12 is a plan view of a leaf spring before the electric connector is incorporated.

FIG. 13 is an explanatory diagram for explaining a state in which the leaf spring of the electric connector is not set to the regular position.

[Explanation of symbols] 2 Electric contact part 2a Locking hole 2b Side wall 2c Bottom plate 4 Leaf spring 4a Locking piece 5 Connecting piece 5a Separation part 6 Chain band L Interval

Claims (2)

[Claims] 1. A leaf spring connected to a chain band via a connecting piece is set in an electrical contact portion for receiving a male terminal, and the connecting piece is cut to separate the leaf spring from the chain band. A method of manufacturing an electrical connector in which a leaf spring is attached to an electrical contact portion by inserting locking pieces protruding from both sides in the width direction of the leaf spring into locking holes provided on both side walls of the electrical contact portion, By providing the two connecting pieces with the width of the leaf spring spaced apart from each other, the torsional rigidity of the connecting piece portion is improved,
A method for manufacturing an electrical connector, characterized in that the accuracy of inserting the locking piece into the locking hole is improved. 2. A leaf spring connected to a chain band via a connecting piece, which has a disconnecting portion of the connecting piece remaining when the connecting piece is cut, and which protrudes from both sides in the width direction. A plate spring having a stopper and a cylindrical electrical contact part having a rectangular cross section for receiving the male terminal, wherein the plate spring is disposed on the bottom plate, and the locking pieces are inserted into the left and right side walls. An electrical connector comprising an electrical contact portion having a hole, wherein the cut end surface of the disconnecting portion is arranged at an opening end portion of the bottom plate on the male terminal insertion side, the disconnecting portion being the leaf spring. And two tongue pieces are provided at full width of the base plate, and the bottom plate has a tongue piece that is bent from the opening end portion to the leaf spring through the gaps between the separating portions. And electrical connector.