JPH0927369A - Contact terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembling, and also facilitate coupling. SOLUTION: A spring receiving portion 18 of a junction member 13 is mutually fitted in a cylinder portion 15 of a contact member 11 so that the contact member 11 can slide along the junction member 13. A coil spring 14 is contained in the mutually fitted cylinder portion 15 and the spring receiving portion 18, and the contact member 11 is energized forward. A conduction member 22 of a braided wire is fitted outside the cylinder portion 15 and the junction member 13, and both ends thereof are ultrasonic-welded to the cylinder portion 15 and a flange 21 of the junction member 13. When the contact member 11 is pressed onto a counter-terminal, the contact member 11 is surely slid in an axial direction as sliding on the junction member 13 so that the contact member 11 is confronting coupled in a normal state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to contact terminals that are connected by surface contact.

[0002]

2. Description of the Related Art Conventionally, a surface contact terminal has been used for connection at a location where a large current flows, which is brought into a conducting state by abutting the tip surfaces thereof. As shown in FIG. 9, the surface contact terminal is configured to include a contact member 2 having a contact surface 1 that abuts against a mating terminal, and a relay member 4 connected to the end of the electric wire 3. . And, in order to electrically connect these, the contact member 2 and the relay member 4 are connected by the braided wire 5. Braided wire 5
Is fixed by crimping both ends thereof to the ends of the contact member 2 and the relay member 4, respectively. Furthermore, the braided wire 5
A coil spring 6 is externally fitted to the coil spring 6, and both ends of the coil spring 6 are pressed by the flange portion 2 a of the contact member 2 and the C ring 7 fitted into the relay member 4.

When the terminal 8 on the mating side is connected, the contact surface 1 of the contact member 2 is strongly pressed against the contact surface 8a of the terminal 8 on the mating side. Then, the contact member 2 is displaced toward the relay member 4 side against the elastic force of the coil spring 6, and the contact surfaces 1 and 8a are brought into close contact with each other so that the terminals are joined together. In the meanwhile, the braided wire 5 is contracted and deformed. , Allow the backward movement of the contact member 2.

[0004]

However, in the conventional structure, since the contact member and the relay member are simply connected by the tubular braided wire, when the contact member is displaced, the braided wire is halfway. There was a risk of buckling. In this case, there has been a problem that the contact member is not displaced straight, and the terminals are not directly faced with each other, so that it is difficult to realize a proper connection state. Further, in order to connect the braided wire to the contact member or the relay member, the contact member or the relay member is caulked to crimp the end portion of the braided wire, but this work was very troublesome. The present invention has been made in view of the above circumstances, and an object thereof is to provide a contact terminal which is easy to assemble and easy to be coupled.

[0005]

In order to achieve the above-mentioned object, the contact terminal of the present invention includes a contact member that is abutted against a mating terminal and a relay member to which an end of an electric wire is connected. The parts are fitted in a mutually slidable state, and the contact member and the relay member can be electrically connected to each other through the conductive part, and there is no contact between the contact member and the relay member. It is characterized in that an elastic member for pressing the member against the mating terminal is interposed (the invention of claim 1).

Further, a cylindrical portion which can be fitted to each other may be formed at a facing portion of the contact member and the relay member, and an elastic member may be housed inside the both cylindrical portions ( The invention of claim 2). Further, the elastic member may also serve as the conductive portion (the invention of claim 3).

[0007]

According to the first aspect of the present invention, since the contact member and the relay member are partially fitted to each other so as to be slidable with each other, when the contact member is pressed against the mating terminal, the contact is made. The member is displaced while being guided by the relay member. According to the invention of claim 2, in order to assemble the elastic member, the elastic member may be housed in the slidably fitted contact member and the tubular portion of the relay member, whereby the elastic member is attached to the contact member and the relay member. And the contact member is urged toward the mating terminal. According to the invention of claim 3, the contact member is pressed against the mating terminal by the elastic member. Further, the contact member and the relay member are electrically conducted via the elastic member.

[0008]

As described above, according to the first aspect of the present invention, when connecting, the contact members are guided by the relay member and smoothly displaced, so that the contact members easily face each other and are in a normal state. There is an effect that can be combined with. Further, according to the invention of claim 2, the elastic member can be assembled only by housing it in the cylindrical portion, and it is not necessary to fit a C ring or the like to prevent the coil spring from coming off unlike the conventional case, and the assembly can be performed. It will be easy.

Further, according to the invention of claim 3, since the elastic member for pressing the contact member against the mating terminal also serves as the conducting portion, it is not necessary to form the conducting portion as a separate member.
The number of parts can be reduced and the cost can be reduced.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> A first embodiment of the contact terminal of the present invention will be described below with reference to FIGS. 1 and 2. As shown in FIG. 1, the contact terminal of the present invention has a contact member 11 for contacting a terminal on the other side on the tip side and a relay member 1 connected to the end of an electric wire 12 on the base side.
3 is provided. Further, between the contact member 11 and the relay member 13, a coil spring 14 for pressing the contact member 11 against a mating terminal and a conductive member 22 for electrically connecting the contact member 11 and the relay member 13 are arranged. Has been done.

The contact member 11 is a conductive metal member and has a cylindrical shape with a bottom end, and a contact surface portion slightly smaller in diameter than the cylindrical portion 15 formed at the tip. 1
6 is formed to project. A pair of slide holes 15a are formed in the cylindrical portion 15 so as to face substantially the central portion of the outer peripheral surface. The slide hole 15a has an elongated shape extending in the axial direction of the tubular portion 15, and an engaging projection 17 of a relay member 13 described later is fitted therein. Further, the rear end portion of the slide hole 15a is slightly bent in the circumferential direction as shown in FIG. 2 to be cut out, and then is cut out again to the opening edge portion along the axial direction, so that the engagement is performed. Protrusion 1
It is a guide groove 15b for introducing 7 into the slide hole 15a while preventing it from coming off easily.

The relay member 13 is provided with a cylindrical spring receiving portion 18 cut out to a predetermined depth from the tip end side, and a core wire crimping portion 19 on the base side. The spring receiving portion 18 is formed to have a smaller diameter than the contact member 11 and is slidably fitted in the tubular portion 15 of the contact member 11. Further, the core wire caulking portion 19 has a caulking hole 20 having a predetermined depth formed from the rear side surface thereof.
The core wire 12a exposed from the second covering end is inserted and caulked and fixed. Further, a pair of engaging projections 17 are provided on the outer peripheral surface of the spring receiving portion 18 so as to face each other. The engaging projection 17 is fitted into the slide hole 15a via the guide groove 15b as described above. That is, the relay member 13 is inserted into the tubular portion 15 such that the engaging protrusion 17 is inserted into the guide groove 15b, and when the engaging protrusion 17 comes into contact with the rear end portion of the guide groove 15b, the relay member 13 is slightly moved. The engaging projection 17 is guided to the slide hole 15a by rotating the engaging projection 17 into the slide hole 15a. Further, a flange 21 is provided on the entire outer peripheral surface of the portion where the spring receiving portion 18 and the core wire crimping portion 19 are continuous, and the contact member 11 slid rearward abuts here and slides excessively. It is supposed to be prevented.

The coil spring 14 is for obtaining a contact pressure with the mating terminal, and the fitted contact member 1
1 and the relay member 13, one end of the coil spring 14 is pressed against the bottom surface of the cylindrical portion 15 of the contact member 11, and the other end of the coil spring 14 is connected to the relay member. It enters into the spring receiving portion 18 of 13 and is pressed against the bottom surface thereof. Thereby, the contact member 1
1 is biased toward the mating side terminal, and when pressed against the mating side terminal, it slides toward the relay member 13 while compressing the coil spring 14.

The conductive member 22 is made of a tubular braided material (so-called eccentric wire), and is fitted to the outside from the rear end of the tubular portion 15 of the contact member 11 to the flange 21 of the relay member 13. Both ends thereof are ultrasonically welded to the rear end of the tubular portion 15 and the flange 21 of the relay member 13.
As a result, the contact member 11 and the relay member 13 are electrically connected.

Next, the operation of the present embodiment will be described.
In order to connect to the mating terminal, the contact surface portion 16 is abutted against the mating terminal contact surface portion (not shown) and then strongly pressed. Then, the contact member 11 becomes the relay member 13
The coil spring 14 is compressed by sliding rearward while sliding on the outer surface of the spring receiving portion 18 of. Also,
At this time, the conductive member 22 allows the contact member 11 to slide, with its substantially central portion bulging outward. As a result, the contact surface portions 16 are brought into close contact with each other by the elastic force of the coil spring 14, and the two terminals are brought into a coupled state.

Thus, in this embodiment, the contact member 11
Since the relay member 13 and the relay member 13 are slidably fitted to each other, the contact member 11 can be surely slid in the axial direction, and the contact member 11 can be surely faced to the mating side terminal in a normal state. There is an effect that can be combined. Also,
To assemble the coil spring 14, the contact member 11
The cylindrical portion 15 and the spring receiving portion 18 of the relay member 13 need only be accommodated, and it is not necessary to fit a C ring or the like to prevent the coil spring from coming off as in the conventional case, so that the assembly becomes easy. Further, the conductive member 22 made of a braided material is connected to the contact member 11 and the relay member 13 by ultrasonic welding, and the braided wire is not crimped as in the conventional case, so that the working efficiency is improved.

<Second Embodiment> The difference between this embodiment and the first embodiment lies in the structure for fitting the engaging projections into the slide holes, and the other parts are the same as in the first embodiment. Therefore, the same parts are designated by the same reference numerals and the description thereof will be omitted.

That is, in the present embodiment, as shown in FIG. 4, the slide hole 32a is formed in the cylindrical portion 32 of the contact member 31 as in the first embodiment, but like the first embodiment. A guide groove for guiding the engaging protrusion to the slide hole is not formed. Further, as in the first embodiment, a pair of engaging projections 37 are provided on the outer peripheral surface of a portion where the spring receiving portion 34 of the relay member 33 and the core wire crimping portion 35 are continuous with each other. However, this is not formed integrally with the relay member as in the first embodiment, and as shown in FIG. 3, the spring receiving portion 34 and the core wire crimping portion 35 are arranged so as to pass through the center thereof. Through hole 3 formed
It is provided by fitting the engaging pin 38 into the pin 6. That is, the relay member 3 is provided in the tubular portion 32 of the contact member 31.
3, the through hole 36 is aligned with the slide hole 32a, and the slide hole 32a is inserted.
By engaging the engagement pin 38 into the through hole 36 from the outside of the contact member 31, the engagement protrusion 37 is inserted into the slide hole 32a of the contact member 31.
Can be engaged. As a result, the contact member 31 can slide in the front-rear direction along the slide hole 32a.

Also in this embodiment, as in the first embodiment, when the contact surface portion 16 of the contact member 31 is pressed against the other terminal, the contact member 31 slides on the outer surface of the spring receiving portion 34 of the relay member 33. While sliding backwards. Further, the conductive member 22 is deformed as the contact member 31 slides so that the substantially central portion thereof bulges outward. Thereby, the coil spring 14 is compressed and the contact surface portions 16 are brought into close contact with each other by the elastic force thereof.

Therefore, in this embodiment as well, since the contact member 31 smoothly squirts, both terminals are easily faced and joined in a normal state, and the C-ring is fitted to prevent the coil spring 14 from coming off. This eliminates the need for work such as caulking of the braided wire and braiding wire, thus facilitating the assembling work and reducing the cost.

<Third Embodiment> The difference between this embodiment and the first embodiment is that a conductive member made of a braided material was used in the first embodiment to electrically connect the contact member and the relay member. In this embodiment, a conductive metal bellows is used. The other parts are the same as those in the first embodiment, and therefore, the same parts are designated by the same reference numerals and the description thereof will be omitted.

That is, in the present embodiment, as shown in FIG. 5, a cylindrical bellows 43 having conductivity is arranged between the contact member 41 and the relay member 42, and the coil spring 44 is The bellows 43 is penetrated and both ends thereof are arranged at the cylindrical portion 45 of the contact member 41 and the spring receiver 4 of the relay member 42.
It is arranged in a state that it is inserted in 6. This bellows 43
The tip end portion of is formed slightly larger in diameter than the tubular portion 45 of the contact member 41, and is fitted to the outside of the tubular portion 45.
The rear end of the bellows 43 is formed to have a diameter larger than that of the flange 47 of the relay member 42 and is fitted to the outside of the flange 47. Further, the bellows 43 is formed in a bellows shape, and is capable of expanding and contracting in the front-back direction. The both ends of the bellows 43 and the tubular portion 45 or the flange 47 are fixed to each other by brazing. As a result, the contact member 41 and the relay member 42 are electrically connected to each other via the bellows 43.

When the contact surface portion 48 of the contact member 41 is pressed against the mating terminal, the contact member 41 slides on the outer side surface of the spring receiving portion 46 of the relay member 42 as in the first embodiment and moves backward. Slide to. At this time, the bellows 43 is compressed as the contact member 41 slides. As a result, the coil spring 44 is compressed,
The contact surfaces 48 are brought into close contact with each other by the elastic force.

Therefore, in this embodiment as well, since the contact member 41 slides smoothly, both terminals are easily faced and joined together in a normal state, and the C-ring is fitted to prevent the coil spring from slipping off. This eliminates the need for work such as caulking, and has the effect of facilitating assembly work and reducing costs.

<Fourth Embodiment> The difference between the present embodiment and the first embodiment lies in the conductive member which conducts the contact member and the relay member, and other parts are the same as in the first embodiment. Therefore, the same parts are designated by the same reference numerals and the description thereof will be omitted. That is, the conductive member is formed in a tubular shape in the first embodiment, but in the present embodiment, as shown in FIGS. 6 and 7, the conductive member 51 is composed of a strip-shaped braided wire 52, and the braided wire 52 is formed. 52 is spirally wound around the tubular portion 54 and the spring receiving portion 57 from the rear end portion of the tubular portion 54 of the contact member 53 to the flange 56 of the relay member 55. Both ends of the braided wire 52 are spot-welded to the outer surface of the tubular portion 54 and the outer surface of the flange 56, respectively. As a result, the contact member 53 and the relay member 55 are electrically conducted, and the conductive member 51 can be expanded and contracted as the contact member slides.

Therefore, when the conductive member is formed in a tubular shape as shown in the first embodiment, the conductive member is deformed so as to bulge outward as the contact member slides. Then, the conductive member 51 can be smoothly expanded and contracted without expanding outward. In particular, in the conductive member 22 set for a large current, the diameter of the eccentric wire is large, and in itself, a large force is required for expansion and contraction. By winding the contact member 53, it is possible to move the contact member 53 forward and backward significantly smoothly as compared with a tubular member. Furthermore, since the conductive member 51 does not bulge outward, the housing that accommodates the contact terminal can be downsized.

<Fifth Embodiment> The difference between this embodiment and the first embodiment is that the coil spring is used as the elastic member for pressing the contact member against the mating terminal in the first embodiment. In this embodiment, a leaf spring is used as the elastic member. Further, in the present embodiment, the conductive member is not provided, and the contact member and the relay member are electrically connected by the leaf spring. The other parts are the same as those in the first embodiment, and therefore, the same parts are designated by the same reference numerals and the description thereof will be omitted.

That is, in the present embodiment, as shown in FIG. 8, the contact member 61 has a cylindrical shape made of a conductive metal member, and the first portion is provided at the tip of the cylindrical portion 62 having the cylindrical shape. The contact surface portion 63 projects like the form. Also,
The upper surface of the tubular portion 62 is flatly cut out, and a screw hole 62a is formed in the flat portion so that one end of a leaf spring 64, which will be described later, can be screwed.

The front half of the relay member 65 has a cylindrical shape with its upper surface cut out flatly, and is fitted into the cylindrical portion 62 of the contact member 61. The rear half of the relay member 65 serves as the core wire crimping portion 66 as in the first embodiment, and the core wire 67a exposed from the covering end of the electric wire 67 can be crimped. Further, a screw hole 65a is formed in the flatly cut out portion,
The other end of a leaf spring 64 described later is screwed.

Between the contact member 61 and the relay member 65,
A conductive leaf spring 64 is disposed above the fitted contact member 61 and relay member 65, and the central portion of the leaf spring 64 is bent into a mountain shape to form an elastically deformable portion 64a. In addition, mounting holes 64b are formed at both ends of the leaf spring 64, and screws 68 are inserted into the mounting holes 64b from above to fasten the contact member 61 and the screw holes 62a and 65a of the relay member 65, respectively. As a result, both ends of the leaf spring 64 are fixed to the contact member 61 and the relay member 65, respectively.

When the contact surface portion 63 of the contact member 61 is pressed against the mating terminal, the contact member 61 slides backward while fitting the relay member 65 while deforming the elastically deforming portion 64a of the leaf spring 64. . As a result, the contact surface portions 63 are brought into close contact with each other by the elastic force of the leaf spring 64. Further, the contact member 61 and the relay member 65 are electrically connected via the leaf spring 64, and the electric wire connected to the mating terminal and the electric wire 67 crimped and fixed to the core wire crimping portion 66 are electrically conducted.

Therefore, also in this embodiment, as in the first embodiment, both terminals can easily face each other and can be connected in a normal state. Further, since the braided wire is not used, the work such as crimping it is unnecessary, and the assembling work becomes easy. Further, in the present embodiment, since the leaf spring 64 also serves as a conductive member that conducts the contact member 61 and the relay member 65, it is not necessary to separately provide a conductive member, and the number of parts can be reduced to reduce the cost. You can

The present invention is not limited to the above-described embodiments, but can be modified and implemented as follows, for example, and these embodiments also belong to the technical scope of the present invention. (1) In the first, second, third, and fourth embodiments described above, the coil springs 14 and 44 include the tubular portions 15, 32, 45, and 5.
It was housed so as to be pressed against the inner surface of 4 and the inner surfaces of the spring receiving portions 18, 34, 46, 57. May be. As a result, the contact member and the relay member are electrically connected via the coil spring, and it is not necessary to separately provide a conductive member, so that the cost can be reduced. In addition, the present invention can be implemented with various modifications without departing from the scope.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an entire first embodiment.

FIG. 2 is a perspective view of the same embodiment.

FIG. 3 is a cross-sectional view showing an entire second embodiment.

FIG. 4 is a perspective view of the same embodiment.

FIG. 5 is an exploded perspective view showing an entire third embodiment.

FIG. 6 is a sectional view showing an entire fourth embodiment.

FIG. 7 is a perspective view of the same embodiment.

FIG. 8 is an exploded perspective view showing the entire fifth embodiment.

FIG. 9 is a perspective view showing a conventional example.

[Explanation of symbols]

 11, 31, 41, 53, 61 ... Contact member 13, 33, 42, 55, 65 ... Relay member 15, 32, 45, 54, 62 ... Cylindrical portion 18, 34, 46, 57 ... Spring receiving portion (cylindrical portion) ) 14,44 ... Coil spring (elastic member) 64 ... Leaf spring 22, 51 ... Conductive member (conductive portion) 43 ... Bellows (conductive portion)

Claims (3)

[Claims] 1. A contact member abutting against a mating terminal and a relay member to which an end of an electric wire is connected are partially fitted in a mutually slidable state, and the contact member and The relay member can be electrically conducted through a conducting portion, and an elastic member for pressing the contact member against the mating terminal is provided between the contact member and the relay member. A contact terminal characterized by being interposed. 2. A cylindrical portion which can be fitted to each other is formed at a facing portion of the contact member and the relay member, and the elastic member is housed inside the both cylindrical portions. The contact terminal according to claim 1. 3. The contact terminal according to claim 1, wherein the elastic member also serves as the conducting portion.