JPH0711743U - Breaker wire connection terminal - Google Patents

Abstract

(57) [Abstract] [Purpose] The main purpose of the present invention is to perform the electrical connection work between the electric wire 1 and the terminal 2 of the breaker with one touch, and also to maintain this electrical connection state in a good condition. . [Structure] In an electric wire connecting terminal 3 of a breaker for electrically connecting an electric wire 1 and a terminal 2, an electric wire connecting portion 4 which is long in a vertical direction N and a pin terminal 5 is inserted and removed in a horizontal direction Y. The socket 7 in which the pin terminal insertion / removal hole 6 is formed and the pin terminal 5 that is long in the left-right direction Y are formed in a substantially L shape with the pin terminal 5 inserted in the pin insertion / removal hole 6, and It is elastically held via a spring contactor 8 positioned between the socket 7 and the pin terminal 5, and the electric wire 1 and the terminal 2 are held.
And is electrically connected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wire connection terminal of a breaker, and more particularly, to a technique for reducing the contact resistance with one touch as a means for electrically connecting a wire and a terminal.

[0002]

[Prior art]

 As is well known, a breaker uses a means for electrically connecting the electric wire 101 and the terminal 102. More specifically, referring to FIG. 24, the wire crimp terminal 103 is crimped onto the end of the wire 101, and the wire crimp terminal 103 is positioned between the terminal 102 and the washer 104. Then, the terminal 102 and the washer 104 are tightened via a spring washer 105 by a screw 106 for holding the electric wire crimp terminal 103. As a result, the terminal 102 and the wire crimp terminal 103 are mechanically and electrically connected, and thus the wire 101 and the terminal 102 are electrically connected.

[0003]

[Problems to be solved by the device]

 According to the above conventional technique, there are some problems in the following points. That is, as the first point, when focusing on the electrical connection work between the electric wire and the terminal, it is necessary to tighten the screw after the wire crimp terminal is positioned between the washer and the terminal. Was tedious and time consuming. Also, as the second point, when tightening the screw, the screw gradually loosens due to the vibration of the breaker itself or the change of the terminal and the wire crimping terminal itself or the ambient temperature. Good mechanical and electrical contact with the terminals could not be maintained. Furthermore, as a third point, when the screw is loosened, the contact area between the wire crimp terminal and the terminal is reduced, and thus the contact resistance is increased. As a result, a temperature rise may occur at the contact portion between the wire crimp terminal and the terminal, causing burnout, and it has been required to reduce the contact resistance as much as possible. In addition, if the contact resistance is large, a large terminal must be used in order to suppress the temperature rise, and it has not been possible to meet the demand for miniaturization of the terminal.

Therefore, the object of the present invention is to make it easy to electrically connect the wire and the terminal as 1, and maintain the connection state as good as mechanically and electrically as 2. The third object is to provide a technology capable of maintaining the contact resistance in a small state at all times and reducing the size of the terminal.

[0005]

[Means for solving the problem]

 In order to solve the above object, the present invention has the following technical means. That is, referring to the reference numerals in the accompanying drawings corresponding to the embodiments, the present invention is such that the wire 1 is connected to the wire connection terminal 3 of the breaker for electrically connecting the wire 1 and the terminal 2. An electric wire connecting portion 4 which is long in the vertical direction N, and a socket 7 which is continuous with the electric wire connecting portion 4 and in which a pin terminal insertion hole 6 is formed in which the pin terminal 5 is inserted and withdrawn in the horizontal direction Y 1. With the pin terminal 5 inserted in the pin terminal insertion hole 6 of the socket 7 connected to the terminal 2 and having a long side in the left-right direction Y, with the pin terminal 5 inserted in the pin insertion hole 6 , Is substantially L-shaped, and is elastically held via a vane-shaped contactor 8 positioned between the socket 7 and the pin terminal 5 to electrically connect the electric wire 1 and the terminal 2 to each other. It is an electric wire connection terminal of a breaker characterized by being connected.

Another feature is that the spring contactor 8 is intermittently arranged along the circumferential direction between two ring pieces 9 arranged at a predetermined interval. It is characterized in that it is integrally formed in a shape in which a plurality of mountain portions 10 are bridged.

Another feature is that the socket 7 has an annular mounting groove 11 formed in a circular shape on the defining surface 6a of the pin terminal insertion / extraction hole 6 of the socket 7 and having a concave cross section. When the pin terminals 5 are attached to the socket 7 and the pin terminals 5 are removed from the surface having the defining surface 6a of the pin terminal insertion / removal holes 6, the center of the pin terminal insertion / removal holes 6 is attached. It is characterized in that it projects toward the axis.

Further, another feature is that the spring contactor 8 is attached to the pin-side annular mounting groove 12 formed in the surface 5a of the pin terminal 5 with a concave cross section. In the state in which the pin 5 terminals are pulled out from the socket 7, the respective ridges 10 are projected radially outward from the surface having the surface 5a of the pin 5 terminals.

Further, another feature is that at least one of the socket 7 and the pin terminal 5 is detached for holding the state in which the pin terminal 5 is inserted into the pin terminal insertion / extraction hole 6. It is characterized by having a stopping mechanism.

[0010]

[Action]

 According to the above structure, the socket 7 and the pin terminal 5 are elastically held by the spring connector 8 by inserting the pin terminal 5 into the pin terminal insertion / extraction hole 6 of the socket 7. The electric wire 1 connected to the socket 7 and the terminal 2 connected to the pin terminal 5 can be electrically connected. As a result, the electric connection work between the electric wire 1 and the terminal 2 can be done by one-touch by simply inserting the pin terminal 5 into the pin terminal insertion / extraction hole 6 of the socket 7. Further, as 2, the spring contact 8 is located between the socket 7 and the pin terminal 5, and the spring contact 8 elastically contacts the socket 7 and the pin terminal 5. By this, even if the socket 7 or the pin terminal 5 contracts or expands due to vibration, temperature change, etc., the spring contact 8 is also displaced corresponding to the displacement, and the socket 7 and the pin terminal 5 are Good mechanical and electrical contact can be maintained. Further, as 3, the spring contactor 8 is always in contact with the socket 7 and the pin terminal 5 with its elasticity and a relatively large number of contact points, so that the contact resistance is extremely small. The contact resistance can be maintained in a good condition at all times without increasing.

[0011]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 8 show the wire connection terminal 3 of the breaker of the first embodiment. The electric wire connecting terminal 3 comprises a socket 7 and a pin terminal 5.

Focusing on the socket 7, an electric wire connecting portion 4 which is long in the vertical direction N and a pin terminal inserting / extracting hole 6 which is continuous with the electric wire connecting portion 4 and into which the pin terminal 5 is inserted / extracted in the lateral direction Y are formed. Are formed. The wire connecting portion 4 is formed with a wire insertion hole 13 into which the wire 1 is inserted. The electric wire 1 inserted in the electric wire insertion hole 13 is sandwiched and fixed by the peripheral wall 14 of the electric wire connecting portion 4.

The pin terminal insertion / removal hole 6 is continuous with the electric wire connecting portion 4, and is defined by a partition wall 15 that defines the pin terminal insertion / removal hole 6 in the left-right direction Y, and has a circular cross section. It is defined in a cylindrical shape by the defining surface 6a.

The defining surface 6a of the pin terminal insertion / removal hole 6 has a concave cross section, and a socket-side annular mounting groove 11 is formed in an annular shape along the circumferential direction of the defining surface 6a. There is.

A spring contact 8 is annularly attached to the socket side annular attachment groove 11. The spring contactor 8 has a shape in which a plurality of mountain portions 10 are bridged intermittently along the circumferential direction between two ring pieces 9 and ring pieces 9 arranged at a predetermined interval. It is formed integrally with the. Focusing on the state where the spring contactor 8 is attached to the socket-side annular mounting groove 11, the two ring pieces 9 and 9 are the bottom surface 11a and the side surface 11b of the socket-side annular mounting groove 11. And the ridges 10 of the spring contact 8 project from the surface having the defining surface 6a of the pin terminal insertion hole 6 toward the central axis of the pin insertion hole 6. There is.

Further, focusing on one of the plurality of ridges 10 with reference to FIG. 3, the ridge 10 is formed by bridging the two ring pieces 9 and the ring pieces 9 to form the pin terminal. It projects toward the central axis of the insertion / removal hole 6. In this state, the mountain portion 10 is in a state of protruding by a predetermined height H from the surface A having the defining surface 6a.

Next, paying attention to the pin terminal 5, the pin terminal body 18 formed to extend in the left-right direction Y, the step portion 19 continuous with the pin terminal body 18, and the terminal corresponding to the conventional terminal 102. It comprises a connecting part 20 for connecting the two.

The pin terminal body 18 has a columnar shape in which the cross-sectional area perpendicular to the longitudinal direction of the pin terminal body 18 is substantially the same as the cross-sectional area perpendicular to the longitudinal direction of the pin terminal insertion hole 6 of the socket 7. When the pin main body 18 is inserted into the pin terminal insertion / extraction hole 6 of the socket 7, the pin main body 18 can be fitted without excess or deficiency. The step portion 19 has a diameter larger than the diameter of the pin terminal body 18, and when the pin terminal body 18 is inserted into the pin terminal insertion hole 6 of the socket 7, the step portion is 19 abuts on one end 15a of the defining wall 15 and stops its insertion. The terminal 2 is brazed to the connecting portion 20.

In the socket 7, the wire 1 and the spring contact 8 are electrically connected, and in the pin terminal 5, the contact terminal 2 and the pin terminal 5 are It is electrically connected.

A method of using the above-described configuration will be described. First, the electric wire 1 is inserted into the electric wire insertion hole 13 of the socket 7 and sandwiched to prepare the socket 7 in which the electric wire 1 is connected to the electric wire connecting portion 4. The terminal 2 is brazed to the connecting portion 20 of the pin terminal 5.

Then, the pin terminal 5 is inserted into the socket 7. That is, the pin terminal body 18 of the pin terminal 5 is inserted into the pin terminal insertion / extraction hole 6 of the socket 7. Here, referring to FIGS. 3 to 5, focusing on the spring property of the spring contact 8, first, the pin terminal main body 18 in the pin terminal insertion hole 6 shown in FIG. In the state before reaching the spring contactor 8, the crest portion 10 of the spring contactor 8 has a predetermined height H from the surface A having the defining surface 6a of the pin terminal insertion / extraction hole 6. Is protruding.

Next, when the pin terminal main body 18 is gradually inserted into the pin terminal insertion / removal hole 6 and the surface 5 a of the pin terminal main body 18 comes into contact with the mountain portion 10 of the spring contact 8, A force is applied to the mountain portion 10 from the peak point B of the mountain portion 10 along the mountain portion 10 in the direction of the ring piece 9 (direction of arrow E), and the spring contactor 8 as a whole is provided with the pin terminal. The force from 5 is absorbed, and the socket 7 and the pin terminal 5 are elastically displaced so as to come into contact with both the socket 7 and the pin terminal 5. (See FIGS. 4 and 5)

When the pin body 18 is inserted into the pin terminal insertion / removal hole 6, the stepped portion 19 of the pin terminal 5 comes into contact with the one end 15a of the defining wall 15 of the socket 7, and the insertion is stopped.

Thus, the insertion of the pin terminal 5 into the socket 7 is completed. In this state, the socket 7 and the pin terminal 5 are elastically held via the spring contact 8 which is located between the socket 7 and the pin terminal 5. The positional relationship between the wire connecting portion 4 which is long in the vertical direction N and the pin terminal 5 which is long in the left-right direction Y is L-shaped.

Here, with reference to FIG. 8, attention is paid to the spring characteristic of the spring contactor 8. For example, at least one of the socket 7 and the pin terminal 5 contracts due to the vibration of the breaker, the temperature change of the socket 7 or the pin terminal 5 itself, etc., and the defining surface 6a of the socket 7 and the pin terminal 5 are contracted. When the surface 5a of the pin 5 is displaced in the direction in which it is about to separate (dashed line E in FIG. 8), the spring contactor 8 absorbs the amount of displacement due to the contraction, and the pin 5 always has a predetermined pressure on the surface 5a. Contact (dotted line F in FIG. 8). On the contrary, for example, at least one of the socket 7 and the pin terminal 5 expands due to the vibration of the breaker, the temperature change of the socket 7 or the pin terminal 5 itself, and the partition surface 6a of the socket 7 is formed. When the surface 5a of the pin 5 terminal is displaced in the approaching direction (dotted line G in FIG. 8), the spring contactor 8 absorbs the displacement due to the expansion, and the surface 5a of the pin terminal 5 is constantly subjected to a predetermined pressure. Contact (dotted line I in FIG. 8). The solid lines J and K in FIG. 8 are the positions of the spring contactor 8 and the pin terminal 5 before contraction or expansion, respectively.

Next, the second embodiment will be described in detail with reference to FIGS. 9 to 14. In this example, substantially the same parts as those in the first embodiment described above are omitted, only different parts are described, and the same applies to the following embodiments. That is, the spring contact 8 is attached to the socket 7 side in the first embodiment, but is attached to the pin terminal 5 side in this example.

More specifically, the surface 5a of the pin body 18 of the pin terminal 5 has a concave cross section, and the pin-side annular mounting groove 12 is formed annularly along the circumferential direction of the surface 5a. There is. The spring contact 8 is annularly attached to the pin-side annular attachment groove 11.

Focusing on the state where the spring contactor 8 is attached to the pin side annular mounting groove 12, the two ring pieces 9 and the ring piece 9 are the bottom surface 12a and the side surface of the pin side annular mounting groove 12. Each of the crests 10 of the spring contactor 8 projects radially outward from the surface C having the surface 5a of the pin terminal 5 while being fitted in contact with 12b.

Further, focusing on one of the plurality of ridges 10 with reference to FIG. 11, the ridge 10 bridges the two ring pieces 9 and 9 with each other. In this state, the mountain portion 10 is in a state of protruding by a predetermined height H from the surface C having the surface 5a of the pin terminal 5.

Next, a third embodiment will be described with reference to FIGS. 15 and 16. In this example, at least one of the socket 7 and the pin terminal 5 has a retaining mechanism for retaining the state in which the pin terminal 5 is inserted into the pin terminal insertion / removal hole 6. More specifically, although the pin terminal 5 can be inserted into and removed from the socket 7, a mechanism for preventing the pin terminal 5 from coming off the socket 7 easily when the pin terminal 5 is inserted is the removal preventing mechanism. is there.

The retaining mechanism comprises a retaining ring 21 arranged on the socket 7 side and a retaining groove 22 formed on the pin terminal 5 side, and the pin terminal 5 is a slide ring. 27, and the slide ring 27 is movable so as to move back and forth in the direction of the retaining groove 22.

The retaining ring 21 is arranged in a ring groove 23 having an inclined surface 26 formed along the circumferential direction of the pin terminal insertion / removal hole 6 of the socket 7, and the ring is enlarged in the outward direction. It has elasticity. Further, the ring groove 23 is a groove having a concave cross section along the circumferential direction of the pin terminal body 18, and in a state where the pin terminal 5 is completely inserted into the pin terminal insertion / extraction hole 6, It is formed at a position corresponding to the position where the retaining ring 21 is arranged.

A spring mounting groove 24 is formed on the end 15a side of the defining wall 15 of the socket 7, and a spring 25 is mounted in the spring mounting groove 24. The spring 25 functions to press the retaining ring 21 against the ring groove 23 by the retaining groove 22 of the pin terminal 5.

Next, the operation of the retaining mechanism will be described. That is, when the pin terminal 5 is inserted into the pin terminal insertion / removal hole 6, the retaining ring 21 is positioned in the retaining groove 22 after being elastically deformed by the pin terminal body 18 once in the direction in which the ring expands. To do. When the pin terminal 5 is inserted into the pin terminal insertion / removal hole 6, the spring 25 tries to move in the direction in which the pin terminal 5 comes off. The ring 21 is in contact with the slope 26 of the ring groove 23. At this time, since the retaining ring 21 is engaged with the retaining groove 22, the pin terminal 5 cannot be removed. Further, when the pin terminal 5 is inserted into the socket 7 and is held by the removal preventing mechanism, there is a gap 28 between the one end 15a of the partition wall 15 and the stepped portion 19 of the pin terminal 5. is doing. When removing the pin terminal 5 from the pin terminal insertion / removal hole 6, first, the slide ring 27 is pushed in the insertion direction of the pin terminal 5. As a result, the slide ring 27 is positioned on the retaining groove 22 of the pin terminal 5, and the retaining ring 21 is in external contact with the slide ring 27. Then, from this state, the spring 25 is used to move the entire pin terminal 5 in the direction to pull it out, so that the pin terminal 5 is pulled out from the socket 7.

Next, in the above-mentioned first, second and third embodiments, as the spring contact 8, the spring contact 8 in which the peak portion 10 makes surface contact with the other party is used. A fourth embodiment using the spring contactor 8 which makes point contact with the above will be described with reference to FIGS. 17 to 23. That is, the spring contactor 8 in this example has a plurality of contacts 29 between the two ring pieces 9 and the ring piece 9. The contactor 29 has a spring property, one end 29a elastically makes point contact with the bottom surface 11a of the socket-side annular mounting groove 11, and the other end 29b elastically makes contact with the surface 5a of the pin terminal 5. Are in contact.

As described above, the electrical connection work between the electric wire 1 and the terminal 2 can be performed by one-touch operation by only inserting the pin terminal 5 into the socket 7. Further, when the pin terminal 5 is inserted into the socket 7, the spring 7 holds the socket 7 and the pin terminal 5 elastically via the spring contactor 8 between the socket 7 and the pin terminal 5. Therefore, the vane-shaped contactor 8 is always mechanically in contact with the socket 7 and the pin terminal 5, and a good electrical contact state can be maintained. Further, due to the spring characteristic of the spring-like contactor 8, the spring-like contactor 8 constantly mechanically contacts in correspondence with the displacement of the socket 7 and the pin terminal 5, resulting in a structure having a relatively large number of contact points. Therefore, the increase in contact resistance is small.

[0037]

【effect】

 As described in detail above, the present invention provides 1 according to claims 1 to 4, and by inserting a pin terminal into the socket, an electrical connection between an electric wire and a contact terminal connected to the socket is provided. The physical connection can be made by one-touch operation, and secondly, when the pin terminal is inserted in the socket, the spring contact is located between the socket and the pin terminal, and the spring contact is the socket and the pin. Since the terminal 5 elastically contacts the terminal 5 with a relatively large number of contact points, the pin terminal inserted into the socket is elastically held in the socket. Even if the socket and pin terminal contract or expand due to vibration of the breaker or temperature change, the spring contact also displaces in response to the displacement, and mechanical contact between the socket and pin terminal Good electrical contact It can be maintained in. Furthermore, as set to 3, since the spring contact has the elasticity and is always in contact with the socket and the pin terminal, the contact resistance does not increase, and the spring contact is always in a good state. The contact resistance can be maintained. Further, since the contact resistance is suppressed from being increased by the spring contactor, so that the temperature rise is also suppressed, it is possible to downsize the terminal without requiring a large terminal as in the conventional case. According to a fifth aspect of the present invention, the retaining mechanism prevents the pin terminal inserted into the pin terminal insertion / extraction hole from easily coming off.

[Brief description of drawings]

FIG. 1 is the first of the wire contact terminals of the breaker according to the present invention.
FIG. 6 is an end view showing a state before connection between the socket and the pin terminal of the embodiment of FIG.

FIG. 2 is the first of the wire connection terminals of the breaker according to the present invention.
FIG. 6 is an end view showing a connection state between the socket and the pin terminal of the embodiment of FIG.

FIG. 3 is the first of the wire connection terminals of the breaker according to the present invention.
FIG. 6 is a partial enlarged view showing a state before the pin terminal body contacts the spring contact of the embodiment.

FIG. 4 is the first of the wire connection terminals of the breaker according to the present invention.
FIG. 8 is a partially enlarged view showing a state where the pin terminal body comes into contact with the spring contact of the embodiment of FIG.

FIG. 5 is the first of the wire connection terminals of the breaker in the present invention.
FIG. 7 is a partial enlarged view showing a state in which the pin terminal body is in contact with the spring contact of the embodiment of FIG.

FIG. 6 is the first of the wire connection terminals of the breaker according to the present invention.
It is the figure which showed the state which connected the electric wire and the terminal to the socket and the pin terminal of the Example of, respectively.

FIG. 7 is the first of the wire connection terminals of the breaker in the present invention.
FIG. 3 is a perspective view of a spring contact of the example of FIG.

FIG. 8 is the first of the wire connection terminals of the breaker in the present invention.
It is a figure explaining the spring characteristic of the spring contact of the example of.

FIG. 9 is a second view of the wire connection terminal of the breaker according to the present invention.
FIG. 6 is an end view showing a state before connection between the socket and the pin terminal of the embodiment of FIG.

[Fig. 10] Second of the wire connection terminal of the breaker in the present invention
FIG. 6 is an end view showing a connection state between the socket and the pin terminal of the embodiment of FIG.

[Fig. 11] Second of the wire connection terminal of the breaker in the present invention
FIG. 6 is a partial enlarged view showing a state before the pin terminal body contacts the spring contact of the embodiment.

[Fig. 12] Second of the wire connection terminal of the breaker in the present invention
FIG. 8 is a partially enlarged view showing a state where the pin terminal body comes into contact with the spring contact of the embodiment of FIG.

[Fig. 13] Second of the wire connection terminal of the breaker in the present invention
FIG. 7 is a partial enlarged view showing a state in which the pin terminal body is in contact with the spring contact of the embodiment of FIG.

[Fig. 14] Second of the wire connection terminal of the breaker in the present invention
It is the figure which showed the state which connected the electric wire and the terminal to the socket and the pin terminal of the Example of, respectively.

[Fig. 15] Third of the wire connection terminal of the breaker in the present invention
FIG. 7 is a diagram showing a state before connection between the socket and the pin terminal of the embodiment of FIG.

[FIG. 16] Third of the wire connection terminal of the breaker in the present invention
It is a figure showing the connection state of the socket and the pin terminal of the example of.

FIG. 17 is an end view showing a state before connection between the socket and the pin terminal of the wire contact of the breaker according to the fourth embodiment of the present invention.

FIG. 18 is a view showing a connection state between the socket and the pin terminal of the wire contact of the breaker according to the fourth embodiment of the present invention.

FIG. 19 is a plan view of an electric wire contactor for a breaker according to a fourth embodiment of the present invention in which a spring contactor is in an extended state.

20 is a cross-sectional view of the spring contact of the wire contact of the breaker according to the fourth embodiment of the present invention taken along the line QQ of FIG.

FIG. 21 is a side view of the spring contact of the wire contact of the breaker according to the fourth embodiment of the present invention, as viewed in the direction of arrow R in FIG.

FIG. 22 is a partially enlarged view showing a contact state of the spring contact in the fourth embodiment of the wire contact of the breaker according to the present invention.

FIG. 23 is a vertical cross-sectional side view taken along line S-S of FIG. 18 of the spring contact of the wire contact of the breaker according to the fourth embodiment of the present invention.

FIG. 24 is a diagram showing a conventional technique.

[Explanation of symbols]

 1 wire 2 terminal 3 connector 4 wire connecting part 5 pin terminal 5a surface of pin terminal 6 pin terminal insertion / extraction hole 7 socket 8 spring contact 9 ring piece 10 mountain part 11 socket side annular mounting groove 12 pin side annular mounting groove N Vertical direction Y Horizontal direction A Surface with defining surface C Surface with pin surface

Claims (5)

[Scope of utility model registration request] 1. An electric wire connecting terminal 3 of a breaker for electrically connecting an electric wire 1 and a terminal 2; an electric wire connecting portion 4 in which the electric wire 1 is connected, and which is long in a vertical direction N; A socket 7 continuous with the wire connecting portion 4 and having a pin terminal insertion / extraction hole 6 into / from which the pin terminal 5 is inserted / extracted in the left / right direction Y; The pin terminal 5 that is inserted into and removed from the hole 6 and is long in the left-right direction Y is formed into a substantially L shape with the pin terminal 5 inserted into the pin terminal insertion hole 6 and the socket 7 and the pin terminal 5 are formed. An electric wire connection terminal for a breaker, which is elastically held via a spring contactor 8 positioned between the electric wire 1 and the terminal 2 to electrically connect the electric wire 1 and the terminal 2. 2. The spring-like contactor 8 has a plurality of peaks 10 intermittently along the circumferential direction between two ring pieces 9 arranged at predetermined intervals. The electric wire connection terminal for a breaker according to claim 1, wherein the electric wire connection terminal is integrally formed in a bridged shape. 3. The spring-like contactor 8 comprises the socket 7
In the state where the pin terminal 5 is removed from the socket 7 by being annularly attached to the defining surface 6a of the pin terminal insertion / extraction hole 6 in the socket side annular attachment groove 11 formed with a concave cross section. 2. Each of the ridges 10 projects from the surface A having the defining surface 6a of the pin terminal insertion / extraction hole 6 toward the central axis of the pin terminal insertion / extraction hole 6.
Breaker wire connection terminal described. 4. The spring contactor 8 comprises the pin terminal 5
When the pin terminal 5 is attached to the socket 7 and the pin terminal 5 is pulled out from the socket 7, it is attached to the pin-side annular attachment groove 12 having a concave cross section. The electric wire connecting terminal of the breaker according to claim 1, wherein the electric wire connecting terminal is radially outwardly projected from the surface C having the surface 5a of the pin terminal 5. 5. At least one of the socket 7 and the pin terminal 5 has a retaining mechanism for retaining the state in which the pin terminal 5 is inserted into the pin terminal insertion / removal hole 6. The electric wire connection terminal of the breaker according to claim 1.