JPS6412067B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crimp spring for connecting a conductor, which is used to hold the connection of an electric wire in a terminal block, etc., and more specifically to a crimp spring for connecting a conductor, which is adapted to clamp not only the conductor but also its sheath. Regarding.

As a device for connecting and holding electric wires to a conductive plate in a terminal block, etc., a ring-shaped, fork-shaped, etc. metal crimp terminal is fixed to the tip of the electric wire, and this is fixed to the conductive plate with a screw. There are various methods for electrically connecting the electrically conductive plate to the electrically conductive plate, and methods using soldering. Therefore, in order to simplify the installation, various devices have been devised in which the conductive wire exposed from the end of the electric wire is brought into elastic contact with the conductive plate using a compression spring. By the way, all of these are designed to hold only the conductor, and if unorganized conductors are used, their surface resistance is weak and they tend to escape when the wire is pulled, and in order to prevent this, If the sharp end is strongly bitten, a new drawback arises in that the conductor wire is cut at the biting part as the wire is pulled.

The reason why such conventional crimping springs only clamp the conductor wire is because, for example, if you try to clamp the wire sheathing and the conductor wire at the same time with equal force, the diameter of the wire sheathing is larger than the conductor wire, The pressure contact on the conductor side weakens due to the difference in level, and eventually,
This is because the wire cannot be held sufficiently.

An object of the present invention is to provide a crimp spring for connecting a conductor which can easily clamp the electric wire and can clamp the conductor and the sheathing part with different appropriate pressures. A crimp bent end for clamping the conductor wire is bent adjacent to the base which is held immovably, and a crimp tip for clamping the wire sheath is formed on a wire connecting the base and the bent end. a bending plate that is connected to the bending end so as to be located on the outside of the bending end, and (b) a bending plate that is connected to the outer end of the bending plate and on the back side of the bending plate. (c) an actuating piece that comes into contact with the back surface of the pressure contact plate and presses the pressure contact plate by movement of the actuation piece to tilt the bending plate toward the conductive plate side; As the pressure contact plate moves due to the pressure of the actuating piece, the bending plate is first tilted about the base as a fulcrum, and the curved surface of the crimp bent end crimp the conductive wire to the conductive plate without cutting into the conductor sharply; When the pressure welding plate is pressed, the bending plate is bent using the bent end as a fulcrum, and the pressure welding tip presses the wire coating in a biting manner, thereby ensuring the wire is held without cutting the conductor and connecting the conductor. It was designed to perform the following.

A first embodiment of the invention will be described with reference to FIGS. 1-3.

Referring to FIG. 1, reference numeral 1 denotes a flexible plate made of a leaf spring material, and a metal conductive plate 10 is attached to the corresponding lower surface of the flexible plate.
is provided, and the base 2 of the bending plate 1 is provided with a conductive plate 10
It is held immovably between the holding piece 13 and the holding piece 13. The bending plate 1 has a triangular press-contact part p bent near its base 2, and its bent end serves as a crimp-fitting bent end 3. Further, the outer side thereof is curved in a U shape 4, and the curved end is used as a pressure contacting tip 5. The press-contacting protrusion 5 is located outside a line 1 connecting the base 2 and the press-fitting bent end 3. Further, the bending plate 1 is bent upward from the base 2, and maintains the position shown in FIG. 1 in a state where no pressure is applied, and is spaced apart from the conductive plate 10.

Further, on the back of the bending plate 1, there is disposed a pressure contact plate 7 having a locking part 8 whose outer end is bent at approximately 90 degrees and whose entire body is slightly curved inward. The section 8 hangs over the U-shaped curve 4 of the flexure plate 1.
As a result, the pressure contact plate 7 is suspended along the back surface of the bending plate 1 in the position shown in FIG.

The conductive plate 10 is located below the flexible plate 1,
It is constructed by connecting a horizontal part 11 that contacts the base 2 and an inclined part 12 that is inclined upward and corresponds to the crimp bent end 3 and the crimp tip 5.

Further, on the back surface of the pressure contact plate 7, an actuation piece 15 is provided which can be supported at an appropriate position in the direction of pressing the pressure contact plate 7.

The operation of the embodiment will be described with reference to FIGS. 1-3.

Insert the electric wire spiral a with the conductor b exposed from the tip part through the insertion opening 18 on the end of the conductive plate 10, and
As shown in the figure, the conducting wire b faces the bent end 3 for crimping, and the covering part c of the electric wire a is the tip 5 for crimping.
position so that it faces the As shown in FIG. 2, when the actuating piece 15 is moved from the state shown in FIG. acts on,
The bending plate 1 tilts with the base 2 as a fulcrum, and as described above, the pressure contacting tip 5 is located outside the line l connecting the base 2 and the pressure bending end 3. The crimp bent end 3 contacts the conductive wire b and presses it against the inclined portion 12, thereby electrically connecting the conductive wire b and the conductive plate 10.

When the actuating piece 15 is further pressed, as shown in FIG.
The curved shape 4 is bent, and its press-contact tip 5 comes into contact with the synthetic resin covering part c in a biting manner due to the elasticity of the covering part c. If the actuating piece 15 is immovably locked in this contact state, its clamping can be ensured.

In the operation of the above embodiment, the conducting wire b is first crimped, and then the covering part c is pressurized, so that even if the diameters of the conducting wire b and the covering part c are different, they can be held uniformly. In addition, since not only the conductor b but also the sheathing part c of the electric wire a is held, the pressure welding tip 5 bites into the sheathing part c due to its elasticity, so that even if the electric wire a is pulled, the actuating piece 15 It is prevented from escaping unless the pressure is released, and retention is ensured. Furthermore, since the contact surface of the crimping bent end 3 is not sharp when holding the conducting wire b, damage to the conducting wire b during holding the electric wire a is prevented as much as possible.

FIG. 4 shows another embodiment in which the bending plate 1 and the pressure contact plate 7 are formed by a single leaf spring, and a triangular pressure contact portion p is provided near the base 2 of the flexible plate 1 and the pressure contact plate 7. By bending and forming the bent end to serve as the crimp crooked end 3a, and further forming a triangular crimp portion p on the outside adjacent to the bent end, and making the bent end the crimp tip 5a. A bending plate 1 is constructed, and its upper end is bent outward to curve along the back surface of the bending plate 1 on the bending plate 1, thereby forming a pressure contact plate 7.
The pressure contacting protrusion 5a is located outside a line l connecting the base portion 2 and the bending end 3 for pressure contact.

In the embodiment, the same effect as in the first embodiment occurs, and when the actuating piece 15 is moved to press the pressure contact plate 7, the pressing force acts on the bending plate 1, and the bending plate 1 2 as a fulcrum, the crimp bent end 3a presses the conductor b, electrically connecting the conductor b and the inclined portion 12, and further presses the actuating piece 15, as shown in FIG. Then, the press-contact tip 5a bends using the press-contact bent end 3a as a fulcrum, and presses the covering portion c.

In FIG. 5, the bending plate 1 and the pressure contact plate 7 are formed by a single leaf spring, as in the previous embodiment, and the pressure contact plate 7 is formed by bending the leaf spring from the base 2. The flexible plate 1 is constructed by further bending inward and connecting the press-fitting protruding end 5c and the press-fitting bent end 3c along the press-fitting plate 7, and its function is similar to that of the embodiment described above. Since it is the same as , it is omitted.

FIG. 6 shows the first embodiment applied to a terminal block 20, which will be explained below.

The terminal block 20 is made of a synthetic resin plate, and its bottom surface is connected to a rail 30, on which a large number of terminal blocks 20 are assembled. The terminal block 20 is provided with two left and right storage gaps 22, 22 partitioned by a partition wall 21 on one side thereof, and the horizontal portion 11 is provided on the upper surface of the lower peripheral wall 23 of the storage gaps 22, 22. A conductive plate 10 having inclined parts 12, 12 formed on both sides is attached, and the center of the horizontal part 11 is fitted to the lower part of the holding piece 13 at the lower end of the partition wall 21. Further, an upper wall 24 is formed at the upper part of the storage gaps 22, 22, and an insertion opening 18 is formed between the upper end of the peripheral wall 23 and the outer end of the upper wall 24, and the upper end of the partition wall 21 and the outer end of the upper wall 24 are formed. An inlet 25 is provided between the inner sides of the upper wall 24, through which an actuating piece 15a (described later) passes. Peripheral wall 2 on the side of the insertion port 18
3, the upper end slightly protrudes inward to form a stepped portion 26, and the peripheral wall surface of the insertion opening 18 is made steeper than the inclination angle of the inclined portion 12 of the conductive plate 10;
The insertion direction of the insertion port 18 is set upward relative to the inclined portion 12. Accordingly, the end of the inclined portion 12 is also made at a steep angle to form a guiding bending end 12a. Furthermore, on the lower surface of the upper wall 24, there are formed a holding surface 27 that extends perpendicularly to the insertion opening 18, and a guide surface 28 that is slightly upwardly inclined inside the holding surface 27.

In the storage gap 22, the bending plate 1 and the pressure contact plate 7 are stored in the above-described combined state, and an actuation piece 15a is provided along the partition wall 21 so as to be movable up and down. In the left state in the figure, the cam surface 34 on the lower surface of the pressing portion 32 formed at the lower end of the actuating piece 15a and expanding outward comes into contact with the upper surface of the pressing plate 7, and the restoring elasticity of the bending plate 1 causes the pressing portion 3 to bulge outward.
The engagement jaws 33 at the upper end of the upper wall 24 abut against a locking surface 29 formed on the side of the entrance 25 of the upper wall 24 and are held in that position. The operating piece 15a is provided with an operating rod 35 along the partition wall 21, and an engaging tooth 21 formed on the upper end of the partition wall 21 with saw teeth 36 formed on the inner surface thereof.
a by the restoring elasticity of the bending plate 1 and held in an appropriate position, and by slightly tilting the operating rod 35 outward, the engagement is released and it becomes possible to move up and down. .

The holding of the electric wire a in the terminal block 20 will be explained. When the electric wire a is inserted through the insertion port 18, since the insertion port 18 has a steeper slope than the slope portion 12, the conductor wire b is bent along the slope portion 12 at the contact portion with the conductive plate 10. . Therefore, the level difference caused by the difference in diameter between the conducting wire b and the covering portion c is alleviated, and the bending angle of the crimp tip 5 with the crimp bent end 3 as a fulcrum is reduced. Therefore, when the actuating piece 15a is lowered against the biasing force of the bending plate 1 as shown in the right state of FIG. , and as described above, attach the crimp bent end 3 to the base 2.
Using the crimping bent end 3 as a fulcrum, press the conductor b against the conductor b, and then press the crimping tip 5 against the covering part c using the crimping bent end 3 as a fulcrum.

As the covering part c is pressed, the covering part c is moved to the stepped part 2.
6, this stepped portion 26 is bent by the wire a.
resists the tension from the insertion port 18 of the
Together with the holding of the electric wire a by the bending plate 1, its escape is strongly prevented.

Further, since the actuating piece 15a is locked at an appropriate position by the engagement between the saw teeth 36 on the inner surface of the actuating rod 35 and the partition wall 21a, the difference between the bending end 3 for crimping and the protruding end 5 for crimping of the bending plate 1 is determined. This means that even if the diameters of the conducting wire b and the covering portion c vary, they can all be held sufficiently.

In the above embodiment, when the conductor b is held between the bent ends 3 for crimping as shown in the right state of FIG. However, since the triangular pressure welding part p is formed into a closed triangular shape, the rigidity is increased, and therefore, the crimp bent end 3 can be firmly pressed and held.

Furthermore, in the embodiment, when the operating rod 35 is tilted to release the engagement with the partition wall 21a,
Due to the backward movement of the bending plate 1, the locking part 8 of the pressure contact plate 7 comes into contact with the guide surface 28, and the contact surface of the pressure contact plate 7 with the pressing part 32 rapidly tilts, kicking the operating plate 15a. increase. For this reason, the lifting spring, etc. is stored in the storage gap 22.
There is an advantage that the actuating plate 15a can be moved back without having to be housed inside. However, in the present invention,
The guide surface 28 may be omitted and a rising spring may be provided.

In the above embodiment, when the actuating plate 15a is urged downward by a lowering spring, and when the electric wire a is held, the pressing force is used to press the pressing plate 7, and the holding is released. for,
This may be pulled up against a downward spring, and in this case, the saw teeth 36 are not provided.

As clarified by the description of the above embodiments, the present invention includes a crimp bent end 3 adjacent to the base 2;
A crimping spring is constituted by a bending plate 1 having a crimping protrusion 5 near the insertion opening of the conductor and a crimping plate 7 located outside the bending plate 1, and by pressing the crimping plate 7 with an actuating piece 15, The bending plate 1 is tilted, and the conductor b is first crimped by the bending end 3 for crimping, and then the bending plate 1 is bent using the bending end 3 as a fulcrum, and the tip 5 is connected to the wire covering part c. Since the conductor b and the sheathing part c are made to bite into each other, the conductor b and the sheathing part c are clamped differently.Moreover, by holding the actuating piece 15 at an arbitrary position, even if the diameters of the conductor b and the sheathing part c vary, they can all be clamped. In addition, the holding force is increased by the clamping of the covering part c, and since the pressing of the conductor b is not supported by the bent end 3 for crimping in a biting manner, the electric wire a is Even if it is pulled, the conductive wire b does not break, and therefore the electric wire a can be easily and reliably held, and the electric wire b can be electrically connected easily, which is an excellent effect.

[Brief explanation of drawings]

1 to 3 are front views showing the operating state of the first embodiment of the present invention, FIG. 4 is a front view of the second embodiment, and FIG.
The figure is a front view of the third embodiment, and FIG. 6 is a front view of the first embodiment applied to a terminal block 20. 1; Flexible plate; 2; Base; 3; Bent end for crimping;
5; Pressure contact tip, 7; Pressure contact plate, 10; Conductive plate, 1
3; Holding piece, 15; Operating piece, 18; Insertion port, 2
0; Terminal block, 21; Partition wall, 22; Storage gap, 2
3; Peripheral wall, 24; Upper wall, 25; Entrance port, 26; Step portion, 28; Guide surface, 32; Pressing portion, 34; Cam surface, 35; Operating rod, a; Electric wire, b; Conductor, c; Coating Department.

Claims (1)

[Scope of Claims] 1. A crimp end made of a plate spring material for clamping a conductor wire is bent adjacent to a base portion that is held immovably, and the crimp end is crimp for clamping a wire sheathing. a bending plate that is adjacent to the outside of the bending end and connected to the bending end so that the projecting end thereof is located outside of a line connecting the base and the bending end; (b) an outer end portion of the bending plate; a press-contact plate that is connected to and arranged along the back surface of the flexible plate; (c) that contacts the back surface of the press-contact plate and presses the press-contact plate by its movement, thereby converting the bending plate into a conductive plate; and an actuating piece that is tilted to the side, and as the pressing plate is moved by the pressure of the actuating piece, the bending plate is first tilted about the base as a fulcrum, and the conductive wire is attached to the conductive plate at the bent end for crimping. A crimp spring for connecting a conducting wire, characterized in that when the crimp plate is crimped and further pressed, the bending plate is bent about the contact point of the bent end as a fulcrum, and the crimp tip pressurizes the wire sheathing. 2. Claim 1, characterized in that a separate bending plate and a press-contact plate are engaged and connected at their outer ends.
Crimp spring for connecting conductor as described in section. 3. The crimp spring for connecting conductor wires according to claim 1, characterized in that the bending plate and the pressure plate are continuous and integrated at the outer end.