JP2015046277A - Circuit breaker device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit breaker device capable of facilitating the operation related to conductive connection and interruption of an electrical circuit or the like.SOLUTION: A circuit breaker device 1 that interrupts an electric circuit by releasing a plug connector 3 inserted into a socket connector 2 from the socket connector 2 comprises a socket main terminal 5 connected to the electric circuit and a socket signal terminal 6 connected to a signal circuit which are provided on the socket connector 2 and a plug main terminal 8 and a plug signal terminal 9 which are provided on a plug connector 3. By inserting the plug connector 3 into the socket connector 2, in a state where the signal circuit is interrupted, the plug main terminal 8 makes contact with the socket main terminal 5 and thereby an electric circuit is conductively connected. By rotating the plug connector 3 while being inserted into the socket connector 2 around an insertion axis line, in a state where the electric circuit is conductively connected, the plug signal terminal 9 makes contact with the socket signal terminal 6 and thereby the signal circuit is conductively connected.

Description

  The present invention relates to a circuit breaker for breaking an electric circuit.

  2. Description of the Related Art Conventionally, a circuit breaker that breaks an electric circuit by detaching a plug connector relatively inserted into a socket connector from the socket connector has been used.

  For example, Patent Document 1 discloses a power circuit breaker including a pair of bus bars connected to a power circuit and a box having an interlock terminal connected to an interlock circuit, and a grip having a short terminal built therein. It is disclosed. In this power circuit breaker, the grip is inserted into the connection hole formed in the box and rotated around the insertion axis, so that the bus bar in the box is elastically deformed by the operation protrusion formed on the grip and is electrically connected to each other. Connected. Thereafter, by further pushing the grip into the connection hole, the interlock terminal is conductively connected by the short terminal, and a power supply circuit is formed. The power supply circuit is shut off by performing the reverse operation to the above.

JP 2012-186074 A

  However, in the technique described in Patent Document 1 described above, in order to form an appropriate power supply circuit, it has been necessary to perform a complicated operation in which the grip is pushed into the box, rotated, and pushed further. For this reason, there is a possibility that the operability related to the conductive connection or disconnection of the power supply circuit or the like is reduced. For example, there is a problem that an operator unfamiliar with the operation cannot easily perform the operation.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a circuit breaker capable of easily performing operations related to conductive connection and disconnection of an electric circuit or the like.

  In order to solve the above problems, a first circuit breaker of the present invention is a circuit breaker that breaks an electric circuit by detaching a plug connector inserted relative to a socket connector from the socket connector, A socket main terminal provided in the socket connector and connected to the electric circuit, a socket signal terminal provided in the socket connector and connected to a signal circuit, a plug main terminal provided in the plug connector, and the plug A plug signal terminal provided on the connector, and the plug main terminal is in contact with the socket main terminal in a state where the signal circuit is cut off by relatively inserting the plug connector into the socket connector. Conductive connection of the electrical circuit, the plug connector in a state of being inserted into the socket connector By relatively rotating the insertion axis as the center, while electrically connected to said electrical circuit, wherein the plug signal terminal is electrically connected to the signal circuit in contact with the socket signal terminals.

  According to the first circuit breaker of the present invention, when the plug connector is relatively inserted into the socket connector, the plug main terminal and the socket main terminal come into contact with each other, and the electric circuit is conductively connected. Thereafter, when the plug connector is rotated relative to the socket connector around the insertion axis, the plug signal terminal and the socket signal terminal come into contact, and the signal circuit is conductively connected. When the plug connector is relatively rotated backward from this state, the plug signal terminal and the socket signal terminal are separated from each other, and the signal circuit is shut off. Thereafter, when the plug connector is relatively removed from the socket connector, the plug main terminal and the socket main terminal are separated from each other, and the electric circuit is interrupted.

  In this way, the electrical circuit is electrically connected and disconnected by the relative insertion / extraction operation of the plug connector, and the signal circuit is electrically connected and disconnected by the relative forward / reverse rotation operation of the plug connector. That is, one circuit connects or disconnects one circuit. As a result, operations related to the conductive connection and disconnection of each circuit can be simplified, and the operability can be improved.

  According to a second circuit breaker of the present invention, in the first circuit breaker described above, the plug main terminal has a cylindrical shape, and the socket main terminal has a pair of separated main terminals separated from each other. Each of the separation main terminals preferably contacts the plug main terminal so as to sandwich the plug main terminal from the inner peripheral surface and the outer peripheral surface.

  According to the second circuit breaker of the present invention, when the plug connector is relatively inserted into the socket connector, the plug main terminal enters between the pair of separated main terminals that are spaced apart from each other and is connected to each other. . At this time, since each separation main terminal contacts both the inner and outer peripheral surfaces of the plug main terminal, for example, the contact area can be increased as compared with the case of contacting only one of the peripheral surfaces. Further, since the plug main terminal has a cylindrical shape, it is possible to form two routes (paths through which electricity flows) connecting the pair of separated main terminals. As a result, a large current can flow, and an electric circuit using a large current can be handled.

  According to a third circuit breaker of the present invention, in the above-described second circuit breaker, each of the separation main terminals is formed so as to be elastically deformable, and is provided so as to be capable of being pressed against the inner peripheral surface of the plug main terminal. And a plurality of outer terminal pieces formed so as to be elastically deformable and capable of being pressed against the outer peripheral surface of the plug main terminal.

  According to the third circuit breaker of the present invention, each inner terminal piece is pressed against the inner peripheral surface of the plug main terminal by its own elastic force, and each outer terminal piece is pushed by its own elastic force. Pressed against the outer peripheral surface. Thereby, the contact state of a plug main terminal and each isolation | separation main terminal can be maintained appropriately. Moreover, since each inner terminal piece and each outer terminal piece are elastically deformed, insertion / extraction of the plug main terminal and rotation of the plug main terminal are not hindered. That is, relative insertion / removal and forward / reverse rotation of the plug connector with respect to the socket connector can be performed smoothly. Furthermore, since each inner terminal piece and each outer terminal piece are elastically deformed, for example, vibration applied from the outside of the circuit breaker can be absorbed. Thereby, for example, even if this circuit breaker is used in an electric system such as an automobile that vibrates violently, the contact state between the plug main terminal and each separation main terminal can be appropriately maintained.

  According to a fourth circuit breaker of the present invention, in the second or third circuit breaker described above, the socket signal terminal includes a pair of separated signal terminals spaced apart from each other at an intermediate portion of the pair of separated main terminals. The plug signal terminal has a U shape, is disposed inside the plug main terminal, and is opened in a U shape with the relative rotation of the plug connector with respect to the socket connector. It is preferable that the inner surfaces of the pair of tip portions respectively contact the pair of separation signal terminals.

  According to the fourth circuit breaker of the present invention, for example, when the pair of tip portions of the plug signal terminals are oriented in the direction in which the separation signal terminals are arranged side by side, the plug signal terminals are in contact with the separation signal terminals. There is nothing. From this state, when the plug connector (plug signal terminal) is rotated and the pair of tip portions of the plug signal terminal are oriented in a direction orthogonal to the parallel arrangement direction of the separation signal terminals, the pair of tip portions of the plug signal terminal Each inner surface comes into contact with a pair of separation signal terminals. In this way, the plug signal terminal can be brought into contact with each separation signal terminal only when the plug connector is relatively rotated by simply making the plug signal terminal into a U-shaped structure. Further, since the socket signal terminal is provided in the middle part of the pair of separated main terminals and the plug signal terminal is provided inside the plug main terminal, the socket connector and the plug connector can be reduced in size.

  According to a fifth circuit breaker of the present invention, in any one of the first to fourth circuit breakers described above, any one of a socket housing constituting an outer shape of the socket connector and a plug housing constituting an outer shape of the plug connector. A guide groove formed on one of the socket housing and the plug housing so as to be engaged with the guide groove, and the guide groove is formed on the socket. An insertion groove portion recessed along a relative insertion direction of the plug connector with respect to the connector, and a recess portion provided along a relative rotation direction of the plug connector with respect to the socket connector from an insertion direction end portion of the insertion groove portion. And the guide protrusion located at the rotational direction end of the rotary groove is moved forward. A locking protrusion is protrudingly provided in the rotation groove preferably have a.

  According to the fifth circuit breaker of the present invention, the guide protrusion is engaged with the guide groove and guided, so that the plug connector can be inserted into and removed from the socket connector and forward and backward rotation easily and accurately. it can. Thereby, the operativity which concerns on the conduction | electrical_connection connection and interruption | blocking of each circuit can be improved more. Further, when the operator relatively rotates the plug connector, the guide protrusion advances through the rotation groove and comes into contact with the lock protrusion. When the operator further applies force to rotate the plug connector further from here, the guide protrusion gets over the lock protrusion and moves to the rotation direction end of the rotation groove. In this state, the guide protrusion is locked to the lock protrusion, and the plug connector is locked to the socket connector. Thereby, the relative reverse rotation of the unintended plug connector can be suppressed, and the state where the electric circuit and the signal circuit are conductively connected can be maintained. Note that the operator can recognize that the relative rotation of the plug connector has been completed by a sound generated when the guide protrusion gets over the lock protrusion and a change (vibration) of the load.

  According to the present invention, it is possible to easily perform operations related to conductive connection and disconnection of an electric circuit or the like.

It is a front view which shows the service plug which concerns on one Embodiment of this invention. It is a top view which shows the service plug which concerns on one Embodiment of this invention. FIG. 3 is a perspective view showing a service plug according to an embodiment of the present invention in a state where the plug connector is detached from the socket connector. It is a top view which shows the socket connector which concerns on one Embodiment of this invention. 1 is a perspective view showing a plug connector according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, showing a state where the plug connector is detached from the socket connector. It is AA sectional drawing in FIG. 2, Comprising: The plug connector is inserted in the socket connector and the state rotated is shown. In the service plug concerning one embodiment of the present invention, it is a front view explaining contact of each terminal of a socket connector and each terminal of a plug connector, (a) shows before contact and (b) is after contact. Is shown. It is BB sectional drawing in FIG. 1, Comprising: The engagement with a rotation groove part and a guide protrusion is shown typically, (a) shows before rotation, (b) shows the middle of rotation, (c) Indicates after rotation (locked state). In the service plug according to one embodiment of the present invention, it is a plan view for explaining the contact between the socket signal terminal and the plug signal terminal, (a) shows before contact, (b) shows the start of contact, (C) shows after contact.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, for convenience, in each figure, Fr is set as the front, the X direction is set as the left-right direction, the Y direction is set as the front-rear direction, and the Z direction is set as the up-down direction.

  With reference to FIG. 1 thru | or FIG. 8, the structure of the service plug 1 as a circuit interruption apparatus which concerns on embodiment of this invention is demonstrated. Here, FIG. 1 and FIG. 2 are a front view and a plan view showing the service plug 1. FIG. 3 is a perspective view showing the service plug 1 with the plug connector 3 detached from the socket connector 2. FIG. 4 is a plan view showing the socket connector 2. FIG. 5 is a perspective view showing the plug connector 3. 6 is a cross-sectional view taken along the line AA in FIG. 2, and shows a state in which the plug connector 3 is detached from the socket connector 2. FIG. FIG. 7 is a cross-sectional view taken along the line AA in FIG. 2 and shows a state in which the plug connector 3 is inserted into the socket connector 2 and rotated. FIG. 8 is a front view for explaining the contact between each terminal of the socket connector 2 and each terminal of the plug connector 3, wherein (a) shows before contact and (b) shows after contact.

  The service plug 1 is provided in a power supply circuit (electric circuit) or a storage battery system for supplying power to a load from a battery mounted on a vehicle such as an electric vehicle or a hybrid car, for example. The service plug 1 cuts off the power supply between the battery and the load in order to ensure work safety during maintenance of the electric system of the vehicle.

  As shown in FIG. 1, the service plug 1 includes a socket connector 2 provided on the power supply circuit side and a plug connector 3 provided so as to be fitted to the socket connector 2.

  In the service plug 1, the plug connector 3 is fitted to the socket connector 2 from above, whereby a power supply circuit (not shown) is conductively connected (short-circuited). Further, the plug connector 3 fitted to the socket connector 2 rotates around the insertion axis, whereby a signal circuit (not shown) is conductively connected (short-circuited). Further, by disconnecting the plug connector 3 from the socket connector 2 in the reverse procedure, the signal circuit is shut off (opened) and the power supply circuit is shut off (opened). Note that the signal circuit is provided for confirming a connection state such as whether or not the conductive connection of the power supply circuit is normal. Note that “conducting connection” indicates that the circuit is connected in a state where power can be supplied, and does not necessarily indicate a state where power is supplied.

  First, the socket connector 2 will be described with reference to FIGS. 1 to 4 and FIG. The socket connector 2 includes a socket housing 4, a socket main terminal 5 connected to a power circuit, and a socket signal terminal 6 connected to a signal circuit.

  As shown in FIGS. 1 to 3, the socket housing 4 is integrally formed of an insulating material such as synthetic resin, and constitutes the outer shape of the socket connector 2. The socket housing 4 includes a housing main body 10 formed in a substantially rectangular parallelepiped shape, and a housing cylinder portion 11 provided at the center in the left-right direction on the upper surface of the housing main body 10.

  The housing body 10 includes a pair of thin plate-like upper and lower flange portions 12 and 13 provided at both ends in the vertical direction, and a main body intermediate portion 14 provided between the pair of upper and lower flange portions 12 and 13. .

  The intermediate part in the left-right direction of the main body intermediate part 14 is formed in a substantially cylindrical shape so as to be continuous below the housing cylinder part 11 (see FIG. 3). Both sides in the left-right direction of the main body intermediate portion 14 are provided on the inner side of the front and rear end surfaces of the flange portions 12 and 13 across the substantially cylindrical intermediate portion. In addition, the lower part of the main body middle part 14 is formed smaller than the upper part, and is provided so as to be recessed inward from the side surface of the upper part.

  Nut holding portions 15 that can hold the hexagon nuts N are formed at both ends in the left-right direction of the main body intermediate portion 14 (see FIGS. 1 and 3). Each nut holding part 15 is recessed from the front of the lower part of the main body intermediate part 14 toward the rear. On the upper surface of the lower flange portion 12, nut entry grooves 16 extending toward the nut holding portions 15 are recessed. The hexagon nut N slides from the front toward the rear along the nut entry groove 16 and is pushed into the nut holding portion 15. Note that the hexagon nut N is restricted from being pulled out by a claw portion 15 a provided at the upper edge portion of the nut holding portion 15.

  As shown in FIG. 6, a pair of left and right fitting recesses 17 into which a part of the socket main terminal 5 is fitted are formed on the lower surface of the lower flange portion 12. Each fitting recess 17 is formed with a screw through-hole 17a communicating with the nut holding portion 15 described above.

  As shown in FIGS. 2 and 3, a plurality of contact portions 13 a that contact a mounting plate (not shown) are provided on the upper surface of the upper flange portion 13. In addition, a pair of left and right screw hole portions 13b are formed on the upper surface of the upper flange portion 13 so that the tips of male screws (not shown) that penetrate the mounting plate are screwed together. Each screw hole part 13b protrudes to the same height as the contact part 13a. Further, each screw hole portion 13b is formed up to about the upper half of the main body intermediate portion 14 (see FIG. 6).

  As shown in FIGS. 3 and 4, the housing cylinder portion 11 includes a socket outer cylinder portion 20 extending upward from the upper surface of the upper flange portion 13, and a socket provided inside the socket outer cylinder portion 20. And an inner cylinder portion 21.

  The socket outer cylinder part 20 is arrange | positioned in the center part of the flange part 13 by planar view. The socket outer cylinder part 20 is formed in a hollow cylindrical shape, and its upper edge is formed in a taper shape. The height of the socket outer cylinder portion 20 is formed substantially the same as the height of the housing body 10. A circular socket outer cylinder opening 20a is formed on the upper surface of the socket outer cylinder portion 20, and the inside thereof is opened.

  A pair of guide grooves 22 are formed on the outer peripheral surface of the socket outer cylinder portion 20 at positions facing each other. Each guide groove 22 includes an insertion groove 22a that is recessed along a substantially vertical direction that is an insertion direction of the plug connector 3 with respect to the socket connector 2, and a rotation direction of the plug connector 3 with respect to the socket connector 2 from the lower end of the insertion groove 22a. It has a rotating groove 22b that is recessed along (for example, clockwise) and a lock protrusion 22c that is protruded on the rotating groove 22b.

  Each guide groove 22 is formed in a substantially L shape in a front view (or a side view) by an insertion groove portion 22a and a rotation groove portion 22b. The pair of insertion groove portions 22 a are formed on a substantially front surface and a substantially back surface of the socket outer tube portion 20. Each insertion groove portion 22a is formed obliquely so as to be clockwise clockwise from the upper end surface to a position above the center of the height of the socket outer cylinder portion 20. Each rotating groove portion 22b is formed substantially parallel to the flange portion 13. Each locking projection 22c is formed on the abutting side of the rotating groove 22b. Each lock protrusion 22c protrudes in the vertical direction so as to partition the rotation groove 22b.

  As shown in FIG. 6, a socket outer cylinder space S <b> 1 is formed in the socket outer cylinder portion 20 so as to penetrate the housing body 10 in the vertical direction from the socket outer cylinder opening 20 a to the lower surface of the flange portion 12. ing. The socket outer cylinder space S1 includes a small-diameter space S11 formed in the upper part, and a large-diameter space S12 that expands outwardly by one step at the approximate center of the socket outer cylinder part 20 and is formed below the small-diameter space S11. It is configured. The large-diameter space S <b> 12 communicates a pair of left and right fitting recesses 17 recessed on the lower surface of the flange portion 12. The communication portion of each fitting recess 17 with respect to the large-diameter space S12 is curved.

  The socket inner cylinder part 21 is disposed on the same axial center as the socket outer cylinder part 20 with a predetermined interval with respect to the inner peripheral surface of the socket outer cylinder part 20. The height of the socket inner cylinder portion 21 is formed substantially the same as the height of the large-diameter space S12. The socket inner cylinder portion 21 includes a large-diameter inner cylinder portion 23 provided at the upper portion and a small-diameter inner cylinder portion 24 provided inside the large-diameter inner cylinder portion 23.

  The large-diameter inner cylinder portion 23 is formed in a bottomed cylindrical shape. A circular inner cylinder opening 23a is formed on the upper surface of the large-diameter inner cylinder part 23, and a socket inner cylinder space S2 formed inside the large-diameter inner cylinder part 23 is opened. Further, the peripheral side wall of the large-diameter inner cylinder portion 23 extends below the bottom of the large-diameter inner cylinder portion 23. A pair of left and right inner cylinder flange portions 23 b that extend slightly outward in the radial direction is formed at the upper end portion of the large-diameter inner cylinder portion 23. The upper edge part of each inner cylinder flange part 23b is formed in the taper shape. The lower end surface of each inner cylinder flange part 23b is provided in the substantially same position (height) as the level | step difference surface of above-mentioned small diameter space S11 and large diameter space S12.

  The small-diameter inner cylinder portion 24 is formed in a cylindrical shape having a smaller diameter than the large-diameter inner cylinder portion 23 and is disposed on the same axis as the large-diameter inner cylinder portion 23. The small diameter inner cylinder portion 24 includes a terminal connection portion 25 that extends downward from the bottom portion of the large diameter inner cylinder portion 23, and a terminal holding portion 26 that extends upward from the bottom portion of the large diameter inner cylinder portion 23. It is configured.

  The terminal connection part 25 is formed in a substantially hollow cylindrical shape. A connection opening 25 a is formed on the lower surface of the terminal connection portion 25. Although not shown, a connector with a cable extending from the signal circuit is fitted into the connection opening 25a from below. The signal circuit and the socket signal terminal 6 are electrically connected via this connector.

  The terminal holding part 26 is formed in a substantially hollow cylindrical shape having a smaller diameter than the terminal connection part 25. The terminal holding part 26 has a predetermined interval with respect to the inner peripheral surface of the large-diameter inner cylinder part 23. A pair of left and right rectangular openings 26 a are formed through the upper surface of the terminal holding portion 26. In addition, terminal openings 26b are formed through both sides of the terminal holding portion 26 in the left-right direction substantially over the entire vertical direction. A terminal space S <b> 3 is integrally formed inside the terminal connection portion 25 and the terminal holding portion 26. In addition, a terminal holding plate 27 that partitions the terminal space S3 into two equal parts in the left-right direction is disposed inside the terminal connection part 25 and the terminal holding part 26.

  An annular engagement groove G is formed between the peripheral side wall of the large-diameter inner cylinder portion 23 that extends downward from the bottom of the large-diameter inner cylinder portion 23 and the terminal connection portion 25. An upper end portion of the terminal fixing member 28 formed in a substantially cylindrical shape is engaged with the engagement groove G.

  As shown in FIGS. 4 and 6, the socket main terminal 5 has a pair of left and right separation main terminals 30 that are separated from each other. Since the pair of left and right separation main terminals 30 are formed to be line targets in the left and right direction, only the right separation main terminal 30 will be described below.

  The separation main terminal 30 is schematically configured with the inner main terminal 30a and the outer main terminal 30b facing each other. The inner main terminal 30a and the outer main terminal 30b are each formed by appropriately bending a conductive metal plate.

  As shown in FIGS. 6 and 8A, the inner main terminal 30a includes a base 31 formed in a substantially flat plate shape, and a curved portion 32 formed by bending upward from the left end of the base 31. The belt-shaped portion 33 is provided integrally with the upper end portion of the curved portion 32 and a plurality of inner terminal pieces 34 extending upward from the upper end portion of the belt-shaped portion 33.

  The base 31 is formed in a substantially rectangular shape that is slightly long in the left-right direction in plan view (see FIG. 10). Further, a base through hole 31 a that communicates with the screw through hole 17 a formed in the fitting recess 17 is formed to penetrate slightly to the right of the center of the base 31.

  The curved portion 32 is located below the large-diameter space S12 and is bent so as to be substantially perpendicular to the base portion 31. The curved portion 32 is formed to have a narrower width in the front-rear direction than the base portion 31 in plan view (see FIG. 10). The upper portion of the bending portion 32 is formed to be bent substantially parallel to the inner peripheral surface of the socket outer cylinder portion 20 in plan view.

  The belt-like portion 33 is formed to be curved substantially parallel to the inner peripheral surface of the socket outer cylinder portion 20 in plan view. The curved belt-like portion 33 is formed to have substantially the same width as the width in the front-rear direction of the base portion 31 (see FIG. 10).

  The plurality of inner terminal pieces 34 are arranged in parallel at equal intervals along the curve of the strip 33 (in the front-rear direction). A predetermined gap is formed between the adjacent inner terminal pieces 34 (see FIG. 10). Since the plurality of inner terminal pieces 34 have the same shape, the following description will be given focusing on one inner terminal piece 34. In the following description, “inside” refers to the radially inner side, and “outer” refers to the radially outer side.

  The inner terminal piece 34 includes a vertical portion 35 that extends vertically upward from the upper end surface of the band-shaped portion 33, a bent portion 36 that slightly extends upward from the upper end portion of the vertical portion 35, and a bent portion 36. Terminal portion 37 extending from the upper end portion of the terminal portion 37 upward and obliquely upward, and a tip portion 38 slightly extending from the upper end portion of the terminal portion 37 toward the obliquely upward inside portion.

  Each part 35-38 of the inner side terminal piece 34 is formed in the same width | variety (width | variety of the parallel arrangement direction). The inner terminal piece 34 is formed so as to be elastically deformable, and is in pressure contact with the inner peripheral surface of the plug main terminal 8 (see FIGS. 7 and 8B). Precisely, a connection portion between the terminal portion 37 and the tip portion 38, that is, a portion bent so as to form a convex shape on the outside is an inner contact portion 39 that contacts the inner peripheral surface of the plug main terminal 8.

  The outer main terminal 30b includes a base 41, a curved portion 42, a belt-like portion 43, and a plurality of outer terminal pieces 44, and is formed integrally with the inner main terminal 30a. Hereinafter, the description of the configuration substantially similar to that of the inner main terminal 30a will be omitted.

  The base 41 of the outer main terminal 30b is fixed in close contact with the upper surface of the base 31 of the inner main terminal 30a. That is, the inner main terminal 30a and the outer main terminal 30b are integrally formed by connecting the base portions 31 and 41 to each other. A base through hole 41a is formed in the base 41 of the outer main terminal 30b so as to communicate with the lower base through hole 31a. An annular protrusion 41b that fits into the screw through-hole 17a formed in the fitting recess 17 of the flange portion 12 protrudes from the upper surface edge of the base through-hole 41a.

  The curved portion 42 and the strip-shaped portion 43 are formed in substantially the same manner as the curved portion 32 and the strip-shaped portion 33 in the inner main terminal 30a, respectively.

  The plurality of outer terminal pieces 44 are arranged in parallel at equal intervals along the curve of the belt-like portion 43 (in the front-rear direction). A predetermined gap is formed between the adjacent outer terminal pieces 44 (see FIG. 10). Since the plurality of outer terminal pieces 44 have the same shape, the following description will be given focusing on one outer terminal piece 44.

  The outer terminal piece 44 includes a vertical portion 45 that extends vertically upward from the upper end surface of the belt-shaped portion 43, a bent portion 46 that slightly extends outward from the upper end portion of the vertical portion 45, and a bent portion 46. A terminal portion 47 extending from the upper end portion of the terminal portion 47 obliquely upward to the inside and a tip portion 48 slightly extending from the upper end portion of the terminal portion 47 to the obliquely upward direction of the outer side. That is, the outer terminal piece 44 is formed substantially in line symmetry with the inner terminal piece 34 with a line extending in the vertical direction as the axis of symmetry.

  Each part 45-48 of the outer side terminal piece 44 is formed in the same width (width of the parallel arrangement direction). The outer terminal piece 44 is formed so as to be elastically deformable, and is in pressure contact with the outer peripheral surface of the plug main terminal 8 (see FIGS. 7 and 8B). Precisely, a connection portion between the terminal portion 47 and the tip portion 48, that is, a portion bent so as to form an inward convex shape is an outer contact portion 49 that contacts the outer peripheral surface of the plug main terminal 8.

  When the socket main terminal 5 (each separated main terminal 30) is held in the socket housing 4, the operator can stack the base part 41 of the outer main terminal 30b on the base part 31 of the inner main terminal 30a. The base portion 41 is fitted into the fitting recess 17 formed in the flange portion 12 of the housing body 10.

  Subsequently, the operator inserts the terminal fixing member 28 from below and engages the engaging groove G (see FIG. 6). Although illustration is omitted, the terminal fixing member 28 comes into contact with the belt-like portion 33 of the pair of left and right inner main terminals 30a. Thereby, the socket main terminal 5 is held inside the housing tube portion 11.

  Next, as shown in FIG. 1, the worker fixes the base portions 31 and 41 to the socket housing 4 together with the terminals C with cables extending from the power supply circuit. Specifically, the operator aligns the hole (not shown) of the terminal C with the base through holes 31a and 41a of the bases 31 and 41, and inserts the male screw member B. The male screw member B is inserted through the hole of the terminal C, the base through holes 31a and 41a, and the screw through hole 17a from below and screwed into the hexagon nut N held by the nut holding part 15.

  Thereby, the separation main terminal 30 (the inner main terminal 30 a and the outer main terminal 30 b) is fixed to the socket housing 4. At the same time, the socket connector 2 is electrically connected to the power supply circuit via a terminal C with a cable.

  As shown in FIG. 6 and FIG. 8A, in a state where the socket main terminal 5 (each separated main terminal 30) is held by the socket housing 4, the bending portion 42 has a slight gap and has a bending portion 32. Is located above. In this state, the belt-like portion 43 is located outside the belt-like portion 33 with a slight gap and at substantially the same height as the belt-like portion 33. Similarly, in this state, each outer terminal piece 44 is located outside each inner terminal piece 34 with a slight gap and at substantially the same height as each inner terminal piece 34. Each inner contact portion 39 and each outer contact portion 49 are slightly separated from each other.

  The curved portions 32 and 42, the strip-shaped portions 33 and 43, the inner terminal pieces 34, and the outer terminal pieces 44 are large in a non-contact state between the socket outer cylinder portion 20 and the socket inner cylinder portion 21, respectively. Arranged in the radial space S12. Therefore, each inner terminal piece 34 and each outer terminal piece 44 can be elastically deformed in the radial direction in the large-diameter space S12.

  In addition, the dimension between the socket outer cylinder part 20 and each inner cylinder flange part 23b (socket inner cylinder part 21) in the state which hold | maintained the socket main terminal 5 (each isolation | separation main terminal 30) in the socket housing 4, For example, it is set so that the operator's finger does not enter. Thereby, it is possible to prevent the operator's finger from unintentionally coming into contact with the socket main terminal 5 (each separated main terminal 30) (so-called finger protection).

  As shown in FIG. 6 and FIG. 8A, the socket signal terminal 6 has a pair of left and right separation signal terminals 50 that are separated from each other in the middle portion of the pair of left and right separation main terminals 30. Each of the pair of left and right separation signal terminals 50 is formed by appropriately bending a conductive metal plate. The pair of separation signal terminals 50 are arranged so as to sandwich the terminal holding plate 27 in the terminal space S3 of the small-diameter inner cylinder portion 24. Since the pair of left and right separated signal terminals 50 are formed to be line targets in the left and right direction, only the right separated signal terminal 50 will be described below.

  As shown in FIG. 8A, the separation signal terminal 50 includes a signal vertical portion 51 that is in close contact with the terminal holding plate 27 on the terminal connection portion 25 side and extends vertically upward, and an upper end portion of the signal vertical portion 51. From the first terminal portion 52 extending obliquely upward on the right side, the second terminal portion 53 extending obliquely upward on the left side from the upper end portion of the first terminal portion 52, and the upper end portion of the second terminal portion 53 And a signal front end portion 54 slightly extending upward and obliquely to the right.

  Each of the parts 52 to 54 of the separation signal terminal 50 has the same width (width in the parallel direction) and is elastically deformable. The signal vertical part 51 extends to the vicinity of the connection opening 25a opened in the terminal connection part 25 (see FIG. 6), and is electrically connected to the terminal (not shown) of the signal circuit connector fitted in the connection opening 25a. Is done. In addition, since the upper part of the signal vertical part 51 is press-fitted into the terminal connection part 25, it is formed wider than the parts 52 to 54.

  A connection portion between the first terminal portion 52 and the second terminal portion 53, that is, a portion bent so as to form a convex shape on the right side is a signal contact portion 55 that contacts the plug signal terminal 9. The signal contact portion 55 projects rightward from the terminal opening 26b of the terminal holding portion 26 and is exposed to the socket inner cylindrical space S2. The signal front end portion 54 is located immediately below the rectangular opening 26a of the terminal holding portion 26 (see FIG. 6).

  Next, the plug connector 3 will be described with reference to FIGS. 3, 5, and 6. The plug connector 3 includes a plug housing 7, a plug main terminal 8 provided inside the plug housing 7, and a plug signal terminal 9 provided inside the plug main terminal 8.

  For example, the plug housing 7 is integrally formed of an insulating material such as synthetic resin, and constitutes the outer shape of the plug connector 3. The plug housing 7 includes a plug outer cylinder portion 60 and a plug inner cylinder portion 61 provided inside the plug outer cylinder portion 60.

  The plug outer cylinder part 60 is formed in a substantially bottomed cylindrical shape. A grip portion 62 that is gripped by an operator is formed on the upper portion of the plug outer cylinder portion 60. The grip part 62 has four unevenness | corrugations along the circumferential direction, and is formed in the substantially cross shape by planar view. The grip portion 62 has a hollow portion 62a having a substantially cylindrical shape that is recessed downward from the upper surface. A circular plug outer cylinder opening 60a is formed on the lower surface of the plug outer cylinder portion 60, and the inside thereof is opened. Inside the plug outer cylinder part 60, a plug outer cylinder space S4 is formed from the plug outer cylinder opening 60a to the lower side of the grip part 62.

  As shown in FIG. 5, a pair of guide protrusions 63 are formed on the inner peripheral surface of the plug outer cylinder portion 60 at positions facing each other so as to engage with the pair of guide grooves 22 described above. Each guide protrusion 63 is formed in a substantially rectangular shape when viewed from the radial direction, and protrudes inward from the inner peripheral surface of the plug outer cylinder portion 60. The protruding amount of each guide protrusion 63 is substantially the same as the depth of each guide groove 22. A slit 64 extending in the circumferential direction is cut into the upper and lower sides of each guide protrusion 63. The guide protrusion 63 provided between the pair of upper and lower slits 64 is configured to be able to be displaced in the radial direction with an elastic force.

  As shown in FIGS. 5 and 6, the plug inner cylinder portion 61 is disposed on the same axial center as the plug outer cylinder portion 60 with a predetermined interval with respect to the inner peripheral surface of the plug outer cylinder portion 60. Yes. The plug inner cylinder part 61 has an inner cylinder base part 65 projecting downward from the top surface of the plug outer cylinder part 60, and an inner cylinder body 66 extending downward from the inner cylinder base part 65.

  As shown in FIG. 6, the inner cylinder base portion 65 is formed in a bottomed cylindrical shape so as to constitute the bottom portion of the lightening hole 62 a formed in the grip portion 62. An O-ring 67 formed in an annular shape with an elastic material such as rubber is provided on the outer peripheral surface of the inner cylinder base 65. A terminal press-fitting groove 68 into which a part of the plug main terminal 8 is press-fitted is formed in the lower surface of the inner cylinder base 65.

  As shown in FIGS. 5 and 6, the inner cylinder main body 66 is formed in a cylindrical shape having a smaller diameter than the inner cylinder base 65, and is disposed on the same axis as the inner cylinder base 65. The inner cylinder main body 66 is formed so as to protrude downward from the plug outer cylinder opening 60 a of the plug outer cylinder portion 60. A terminal internal opening 66 a is formed in the lower surface of the inner cylinder main body 66, and a plug inner cylinder space S <b> 5 formed in the inner cylinder main body 66 is opened. The terminal internal opening 66a is formed to have a substantially U-shaped outer shape in plan view. The lower side of the plug inner cylinder space S5 has the same cross section as the terminal inner opening 66a, and the upper side of the plug inner cylinder space S5 has a cylindrical section.

  As shown in FIGS. 5 and 6, the plug main terminal 8 is formed by bending a conductive metal plate into a cylindrical shape. The plug main terminal 8 is formed in a cylindrical shape having a slightly larger diameter than the inner cylinder base 65. At the upper part of the plug main terminal 8, a notch is formed to form a terminal press-fit portion 8a. The terminal press-fit portion 8a is formed by bending a part of the plug main terminal 8 into a crank shape so as to translate inward.

  When the plug main terminal 8 is held in the plug housing 7, the terminal press-fitting portion 8a is press-fitted into the terminal press-fitting groove 68 formed in the inner cylinder base 65 (see FIG. 6). In this state, the upper end portion of the plug main terminal 8 (excluding the terminal press-fit portion 8a) is fitted to the outer peripheral portion of the inner cylinder base portion 65.

  As a result, the plug main terminal 8 is held by the plug housing 7 with a gap between the plug main terminal 8 and the plug outer cylinder portion 60 and with a gap between the plug main terminal 8 and the inner cylinder main body 66. Note that the lower end portion of the plug main terminal 8 is positioned below the lower end surface of the plug outer cylinder portion 60 and above the lower end surface of the plug inner cylinder portion 61.

  As shown in FIG. 5, the plug signal terminal 9 is formed by bending a conductive metal plate so as to form a U shape in a plan view. The plug signal terminal 9 is formed by bending so that a pair of U-shaped open terminal tip portions 9a are expanded. A pair of cuts 9b are formed in the U-shaped bottom of the plug signal terminal 9. A press-fitting piece 9c is formed between the pair of cuts 9b.

  The plug signal terminal 9 is inserted into the plug inner cylinder space S5 from the terminal inner opening 66a opened in the inner cylinder main body 66, and the press-fitting piece 9c is press-fitted into the protrusion 66b provided on the inner peripheral surface constituting the plug inner cylinder space S5. As a result, the plug housing 7 holds the plug. Note that the lower end surface of the press-fitted plug signal terminal 9 is substantially flush with the lower end surface of the inner cylinder main body 66.

  Next, the operation of the service plug 1 will be described with reference to FIGS. Here, FIG. 9 is a cross-sectional view taken along the line BB in FIG. 1 and schematically shows the engagement between the rotation groove 22b and the guide protrusion 63, (a) shows before rotation, and (b). Indicates the middle of rotation, and (c) indicates the state after rotation (locked state). FIG. 10 is a plan view for explaining the contact between the socket signal terminal 6 and the plug signal terminal 9, where (a) shows before contact, (b) shows when contact starts, and (c) shows after contact. Is shown. In FIG. 9, illustrations of components that are not necessary for describing the engagement between the rotating groove 22 b and the guide protrusion 63 are omitted.

  First, the formation of the power supply circuit by the service plug 1 will be described. The plug connector 3 is assumed to be detached from the socket connector 2 (see FIG. 6).

  The operator holds the grip portion 62 of the plug connector 3 and causes the plug connector 3 to face above the housing tube portion 11 of the socket connector 2 (see FIGS. 6 and 8A). An operator engages a pair of guide protrusions 63 formed on the plug connector 3 with a pair of insertion groove portions 22a (guide grooves 22) formed on the housing cylinder portion 11, and the plug connector along each insertion groove portion 22a. 3 is pushed from above to below. At this time, the socket outer cylinder part 20 is inserted between the plug outer cylinder part 60 and the plug main terminal 8, and the socket inner cylinder part 21 is connected to the plug main terminal 8 and the plug inner cylinder part 61 (inner cylinder main body 66). Inserted between. Further, the terminal holding part 26 of the socket inner cylinder part 21 is inserted into the plug inner cylinder space S5 from the terminal inner opening 66a of the inner cylinder main body 66.

  As the push-in progresses, the lower ends of the plug main terminals 8 provided in the plug connector 3 are connected to the front end portions 38 of the plurality of inner terminal pieces 34 and the plurality of outer terminal pieces respectively formed on the pair of left and right separation main terminals 30. 44 abuts on the tip 48 of the shaft. As the push-in further progresses, the plug main terminal 8 elastically deforms the inner terminal pieces 34 inward and elastically deforms the outer terminal pieces 44 outward, so that the inner terminal pieces 34 and the outer terminal pieces 44 are connected to each other. It enters (see FIG. 8B). Then, the guide protrusions 63 abut against the lower end surfaces of the insertion groove portions 22a, so that the downward push of the plug connector 3 is restricted (see FIG. 9A). At this time, the plug outer cylinder part 60 of the plug connector 3 is covered with the housing cylinder part 11 (refer FIG. 1 and FIG. 7).

  In this state, the pair of left and right separation main terminals 30 are in contact with the plug main terminals 8 so as to sandwich the plug main terminals 8 from the inner peripheral surface and the outer peripheral surface (see FIG. 8B). Specifically, the inner contact portion 39 of each inner terminal piece 34 is in pressure contact with the inner peripheral surface of the plug main terminal 8 by its own elastic force. Similarly, the outer contact portion 49 of each outer terminal piece 44 is in pressure contact with the outer peripheral surface of the plug main terminal 8 by its own elastic force. Thereby, the contact state of the plug main terminal 8 and each separation main terminal 30 can be maintained appropriately. Moreover, since each inner terminal piece 34 and each outer terminal piece 44 are elastically deformed, the plug main terminal 8 can be inserted smoothly.

  In this state, the socket signal terminal 6 is disposed in a non-contact state inside the plug signal terminal 9 (see FIG. 10A). That is, the pair of terminal tip portions 9 a of the plug signal terminal 9 are directed in the direction in which the separation signal terminals 50 are arranged side by side (left-right direction). Precisely, the line connecting the pair of terminal tip portions 9a is inclined about 30 ° clockwise in plan view with respect to the direction in which the separated signal terminals 50 are arranged side by side.

  As described above, by inserting the plug connector 3 into the socket connector 2, the plug main terminal 8 contacts the socket main terminal 5 in a state where the signal circuit is cut off from a state where the power supply circuit and the signal circuit are cut off. Then, the state shifts to a state in which the electric circuit is conductively connected. At this time, the O-ring 67 is in close contact with the upper inner peripheral surface of the socket outer cylinder portion 20 (see FIG. 7).

  Subsequently, the worker rotates the plug connector 3 to the right according to the arrow displayed on the grip 62, for example. Since each guide projection 63 is engaged with each rotation groove 22b, the plug connector 3 rotates along each rotation groove 22b. Each inner contact portion 39 relatively slides on the inner peripheral surface of the plug main terminal 8, and each outer contact portion 49 relatively slides on the outer peripheral surface of the plug main terminal 8. Since each inner terminal piece 34 and each outer terminal piece 44 are elastically deformed, the plug main terminal 8 can be smoothly rotated. In the following description, the state before the start of rotation is used as a reference (0 °).

  When the operator rotates the plug connector 3 by, for example, about 30 ° from the reference, each guide protrusion 63 comes into contact with the lock protrusion 22c provided in each rotation groove 22b (see FIG. 9B). When the operator further applies force to rotate the plug connector 3 from here, each guide protrusion 63 starts to get over the lock protrusion 22c while being slightly displaced radially outward. At this time, the plug signal terminal 9 (each terminal tip 9a side) starts to contact the signal contact part 55 of the pair of left and right separation signal terminals 50 (see FIG. 10B).

  Further, for example, when the plug connector 3 is rotated about 60 ° from the reference, the guide protrusion 63 is fitted between the end face of the rotation groove 22b and the lock protrusion 22c, and the rotation of the plug connector 3 is restricted. (See FIG. 9C). In this state, each guide protrusion 63 is locked to the lock protrusion 22c to the extent that it does not easily reversely rotate (counterclockwise), and the plug connector 3 is locked to the socket connector 2. Thereby, reverse rotation of the plug connector 3 which is not intended can be suppressed, and the state where the electric circuit and the signal circuit are conductively connected can be maintained. Note that the operator can recognize that the rotation of the plug connector 3 has been completed by the sound or load change (vibration) generated when each guide protrusion 63 gets over the lock protrusion 22c.

  In this state, a line connecting the pair of terminal tip portions 9a of the plug signal terminal 9 is substantially parallel to the parallel arrangement direction (left-right direction) of the pair of left and right separation signal terminals 50 (see FIG. 10C). . That is, the U-shaped plug signal terminal 9 is connected to the pair of left and right signal contact portions 55 from both sides in the left-right direction with the pair of terminal tip portions 9a facing in the direction orthogonal to the direction in which the separation signal terminals 50 are arranged in parallel. Touch to pinch. Each of the pair of left and right signal contact portions 55 sandwiched between the plug signal terminals 9 is slightly elastically deformed inward. In this way, the plug signal terminal 9 can be brought into contact with each separation signal terminal 50 only when the plug connector 3 is rotated by simply making the plug signal terminal 9 U-shaped.

  As described above, the plug signal terminal 9 is brought into contact with the socket signal terminal 6 while the power supply circuit is conductively connected by rotating the plug connector 3 inserted into the socket connector 2 about the insertion axis. Then, the signal circuit is shifted to a conductive connection state (see FIG. 7). When the signal circuit is conductively connected, a control device (not shown) connected to the signal circuit determines whether or not the power supply circuit is normally connected. If the signal circuit is normal, the power supply circuit Is energized. That is, a power supply circuit is formed.

  Next, the interruption of the power supply circuit by the service plug 1 will be described. The power supply circuit is shut off by a procedure reverse to the formation of the power supply circuit described above.

  From the state shown in FIG. 7, the operator holds the grip 62 and rotates the plug connector 3 counterclockwise, for example. At this time, the operator rotates the plug connector 3 with a relatively large force so that the guide protrusion 63 gets over the lock protrusion 22c. When it is rotated about 60 ° counterclockwise, the guide protrusion 63 comes into contact with the insertion groove 22a, and the rotation of the plug connector 3 is restricted. In this state, the contact between the plug signal terminal 9 and the socket signal terminal 6 (the pair of left and right signal contact portions 55) is released. That is, the state in which the signal circuit and the power supply circuit are connected to each other is changed to the state in which the signal circuit is cut off and the power supply circuit is connected to the connection. When the signal circuit is cut off, the power supply to the power supply circuit is stopped (cut off) by the control device.

  Subsequently, the operator pulls out the plug connector 3 covered on the housing cylinder portion 11 upward (see FIG. 6). Since each inner terminal piece 34 and each outer terminal piece 44 are elastically deformed, the plug main terminal 8 can be pulled out smoothly. Thereby, the contact between the plug main terminal 8 and the socket main terminal 5 (a pair of left and right separation main terminals 30) is released. That is, the signal circuit and the power circuit are shifted to a disconnected state.

  According to the service plug 1 according to the embodiment of the present invention described above, the electrical connection and disconnection of the electric circuit is performed by the plug connector 3 insertion / extraction operation, and the signal circuit conduction connection and disconnection are performed by the forward / reverse rotation operation of the plug connector 3. Blocking is performed. That is, one circuit connects or disconnects one circuit. As a result, operations related to the conductive connection and disconnection of each circuit can be simplified, and the operability can be improved.

  Further, according to the service plug 1 according to the embodiment of the present invention, when the plug connector 3 is inserted into the socket connector 2, the plug main terminal 8 enters between a pair of separated main terminals 30 that are spaced apart from each other, Connected to each other. At this time, since each separation main terminal 30 contacts both the inner and outer peripheral surfaces of the plug main terminal 8, for example, the contact area can be increased as compared with the case where only the outer peripheral surface (or inner peripheral surface) is contacted. it can. Further, since the plug main terminal 8 has a cylindrical shape, two routes (a path through which electricity flows) connecting the pair of left and right separated main terminals can be formed (the front side surface and the rear side surface of the plug main terminal 8). . As a result, a large current can flow, and a power supply circuit (electric circuit) using a large current can be handled.

  Moreover, according to the service plug 1 which concerns on embodiment of this invention, since each inner terminal piece 34 and each outer terminal piece 44 elastically deform, the vibration added from the outside of the service plug 1 can be absorbed, for example. . Thereby, for example, even if this service plug 1 is used in an electric system such as an automobile that vibrates violently, the contact state between the plug main terminal 8 and each separated main terminal 30 can be appropriately maintained.

  According to the service plug 1 according to the embodiment of the present invention, the socket signal terminal 6 is provided in the middle part of the pair of separated main terminals 30, and the plug signal terminal 9 is provided inside the plug main terminal 8. The socket connector 2 and the plug connector 3 can each be reduced in size. Further, by inserting and guiding the guide protrusions 63 in the guide grooves 22, the plug connector 3 can be inserted into and removed from the socket connector 2 and can be rotated forward and backward easily and accurately. Thereby, the operativity which concerns on the conduction | electrical_connection connection and interruption | blocking of each circuit can be improved more.

  In the service plug 1 according to the present embodiment, each guide protrusion 63 comes into contact with the lock protrusion 22c when the plug connector 3 is rotated about 30 °, and each guide protrusion 63 when the plug connector 3 is rotated about 60 °. However, the present invention is not limited to this, and the rotation angle of the plug connector 3 can be arbitrarily set. The direction in which the plug connector 3 is rotated is also arbitrary.

  In the service plug 1 according to the present embodiment, each guide projection 63 is provided on the plug connector 3 and each guide groove 22 is provided on the socket connector 2. However, the present invention is not limited to this. For example, Each guide protrusion 63 may be provided in the socket connector 2, and each guide groove 22 may be provided in the plug connector 3.

  In the service plug 1 according to the present embodiment, the socket main terminal 5 is composed of a pair of separation main terminals 30 and the socket signal terminal 6 is composed of a pair of separation signal terminals 50. However, the present invention is limited to this. Instead, the number of separation main terminals 30 and the number of separation signal terminals 50 are arbitrary. Further, the number and shape of the inner terminal pieces 34 and the outer terminal pieces 44 can be arbitrarily set.

  In the service plug 1 according to the present embodiment, the plug connector 3 is inserted / removed / rotated with respect to the socket connector 2. However, the present invention is not limited to this. For example, the socket connector 2 is connected to the plug connector 3. May be inserted and removed and rotated. That is, it is only necessary that the plug connector 3 is inserted / removed / rotated relative to the socket connector 2.

  The above description of the embodiment of the present invention describes a preferred embodiment of the service plug 1 according to the present invention, and may have various technically preferable limitations. The technical scope of the present invention is not limited to these embodiments unless specifically described to limit the present invention. Furthermore, the constituent elements in the embodiments of the present invention described above can be appropriately replaced with existing constituent elements, and various variations including combinations with other existing constituent elements are possible. The description of the embodiment of the present invention is not intended to limit the content of the invention described in the claims.

1 Service plug (circuit breaker)
2 Socket connector 3 Plug connector 4 Socket housing 5 Socket main terminal 6 Socket signal terminal 7 Plug housing 8 Plug main terminal 9 Plug signal terminal 9a Terminal tip (tip)
22 Guide groove 22a Insertion groove portion 22b Rotation groove portion 22c Lock projection portion 30 Separation main terminal 34 Inner terminal piece 44 Outer terminal piece 50 Separation signal terminal 63 Guide projection

Claims (5)

A circuit breaker for breaking an electrical circuit by detaching a plug connector inserted relative to a socket connector from the socket connector,
A socket main terminal provided in the socket connector and connected to the electrical circuit;
A socket signal terminal provided in the socket connector and connected to a signal circuit;
A plug main terminal provided in the plug connector;
A plug signal terminal provided on the plug connector,
By relatively inserting the plug connector into the socket connector, the plug main terminal is in contact with the socket main terminal in a state where the signal circuit is cut off, and the electrical circuit is conductively connected,
By rotating the plug connector inserted into the socket connector relative to the insertion axis, the plug signal terminal comes into contact with the socket signal terminal while the electrical circuit is conductively connected. A circuit breaker for electrically connecting the signal circuits. The plug main terminal has a cylindrical shape,
The socket main terminal has a pair of separated main terminals spaced apart from each other,
2. The circuit breaker according to claim 1, wherein each of the separation main terminals contacts the plug main terminal so as to sandwich the plug main terminal from an inner peripheral surface and an outer peripheral surface. Each of the separated main terminals is
A plurality of inner terminal pieces formed so as to be elastically deformable and capable of being pressed against the inner peripheral surface of the plug main terminal;
The circuit breaker according to claim 2, further comprising: a plurality of outer terminal pieces formed so as to be elastically deformable and capable of being pressed against the outer peripheral surface of the plug main terminal. The socket signal terminal has a pair of separation signal terminals spaced apart from each other at an intermediate portion of the pair of separation main terminals,
The plug signal terminal has a U shape, is disposed inside the plug main terminal, and has a pair of U-shaped open ends as the plug connector rotates relative to the socket connector. 4. The circuit breaker according to claim 2, wherein the inner surface of each part contacts the pair of separation signal terminals. 5. A guide groove formed in one of a socket housing constituting the outer shape of the socket connector and a plug housing constituting the outer shape of the plug connector;
A guide protrusion formed on the other of the socket housing and the plug housing so as to engage with the guide groove,
The guide groove is
An insertion groove that is recessed along the relative insertion direction of the plug connector with respect to the socket connector;
A rotation groove portion that is recessed from the insertion direction end of the insertion groove portion along the relative rotation direction of the plug connector with respect to the socket connector;
5. A lock projection portion protruding from the rotation groove portion so as to lock the guide projection located at the rotation direction end portion of the rotation groove portion. 5. A circuit breaker according to claim 1.

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