JP2016006739A - Circuit intermission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a length of a connection ferroelectric terminal in a direction of disconnection when disconnecting the connection ferroelectric terminal from a pair of ferroelectric terminals with a time difference after a connection signal terminal is disconnected.SOLUTION: In a circuit intermission device 1, a plug susceptor 3 includes a pair of ferroelectric terminals 5 continued to a ferroelectric circuit and a pair of signal terminals 31 continued to a signal circuit that makes the ferroelectric circuit intermittent, and a service plug 2 includes a connection ferroelectric terminal 4 for connecting the pair of ferroelectric terminals and a connection signal terminal 30 for connecting the pair of signal terminals. A plug housing 6 of the service plug 2 includes a pressing part 27 for pressing a pressed part 24 of the connection ferroelectric terminal 4 in the direction of disconnection of the service plug 2 and when fitting the service plug and the plug susceptor 3, in a connection state of the pair of ferroelectric terminals 5 and the connection ferroelectric terminal 4, a clearance 21 is provided in the direction of disconnection between the pressing part 27 and the pressed part 24. The plug housing 6 is made movable in the direction of disconnection integrally with the connection signal terminal 30 within a range L of the clearance.

Description

  The present invention relates to a circuit interrupting device for interrupting a strong electric circuit in, for example, a hybrid car or an electric vehicle.

  Conventionally, various circuit interrupting devices have been proposed for temporarily interrupting (interrupting) a power supply circuit of an electric vehicle or the like including an automobile or a hybrid car during maintenance or transportation.

  For example, in Patent Document 1, as a service plug that is a circuit interrupting device, a circuit housing body that houses a pair of female terminals connected to each end of an electric circuit (electric wire), and a pair that is connected via a fuse Each of the male and female terminals is provided with a plug body fitted into the circuit housing body and a handle-like lever provided on the plug body. It is described that the connection is disconnected.

  Further, Patent Document 2 discloses a circuit interruption composed of a service plug (second connector) 71 shown in FIG. 4 and a plug receptacle (first connector) (not shown) for fitting and connecting the service plug 71. An apparatus (connector engagement body) is described.

  The service plug 71 is housed in the housing 72 inside the insulating high-voltage terminal 72, a male connection high-voltage terminal (not shown) having a substantially inverted U shape, which is housed in the housing 72, and the connection high-voltage terminal. A male connection signal terminal (not shown) having a substantially inverted U shape and a lever 73 pivotally supported by the housing 72 are provided.

  A plug receptacle (not shown) includes an insulating housing fixed to a vehicle body between a vehicle battery and a load (such as a motor), and a pair of female high-voltage terminals erected in the housing. And a pair of female signal terminals disposed between the pair of high voltage terminals. Each female high-power terminal is connected to a high-power (power supply) circuit, and each female signal terminal is connected to a low-power signal (control) circuit following the relay. The high voltage circuit is turned on and off by turning the relay on and off.

  The cam pin of the housing of the service plug installation body is slidably engaged with a cam groove (not shown) of the lever 73 of the service plug 71, and the service plug 71 becomes the service plug installation body by the downward rotation operation of the lever 73 of FIG. The service plug 71 is detached from the plug receptor by the fitting connection and the upward rotation operation.

  By rotating the lever 73 downward (clockwise) from the rotation intermediate position of the lever 73 in FIG. 4, the male / female signal terminal contacts with the male / female high-voltage terminal in contact with the signal. When the circuit is connected, the high-power circuit is energized through the relay. By rotating the lever 73 upward (counterclockwise) from the rotation intermediate position of the lever 73 in FIG. 4, first, the male and female signal terminals are disconnected and the signal circuit is cut off, and the high-voltage circuit is connected via the relay. After the power is cut off, the male / female high voltage terminals are disconnected.

  In this way, by providing a time difference between the disconnection of the signal terminal and the disconnection of the high voltage terminal, the occurrence of a spark when the male or female high voltage terminal is disconnected due to the residual current of the high voltage circuit at the moment of the disconnection of the signal circuit is prevented. The

  4, the locked portion 74 of the lever 73 engages with the locking portion 75 of the housing 72, thereby preventing an upward erroneous operation of the lever by the signal terminal release operation portion 76 of the lever 73. . By pulling the lock interference portion 77 of the lever 73 in the direction of the arrow, the arm 78 is bent outward, the locked portion 74 is detached from the locking portion 75, and the lever 73 is rotated upward.

  As shown in FIG. 5, by pushing the signal terminal release operation portion 76 obliquely upward as indicated by an arrow from a position where the lever 73 is rotated downward, a signal terminal locking portion and a signal terminal (not shown) of the lever 73 are shown. The engagement with the locked portion is released, and the lever 73 rotates upward. In FIG. 5, when the high power terminal release operation portion 79 is erroneously operated sideways as indicated by an arrow, the arm 78 is bent inward, and the lock interference portion 77 is engaged with the high power terminal locking portion 75 of the housing 72. Thus, the turning operation of the lever 73 is prevented.

  Patent Document 2 proposes various lever misoperation prevention mechanisms in order to prevent the lever 73 from being erroneously operated. The lever 73 is reliably stopped at an intermediate position of the lever 73 in FIG. As a result, for example, an inadvertent high-speed rotation operation of the lever 73 causes the male / female high-voltage terminal to be detached without leaving a specified time difference (time lag) after the male / female signal terminal is detached (cause of sparks). ) Is prevented.

Japanese Patent Laid-Open No. 10-83753 JP 2013-62043 A (FIGS. 1 to 6)

  However, in the conventional circuit interrupting device shown in FIG. 4, for example, as shown in FIG. 6, as a pair of female high-power terminals 5 on the plug receiver side, a plurality of elastic contacts are provided inside the electrical contact portion 47. In the case of using the piece 51 arranged in parallel in the insertion direction of the male connection high voltage terminal 77, the male connection high voltage terminal 77 on the service plug 71 side is brought into contact with all the elastic contact pieces 51. It has become necessary to define the length in the insertion direction.

  In particular, if the male connection high-voltage terminal 77 is separated from the pair of female high-voltage terminals with a time lag after the male / female signal terminals are detached, the male connection high-voltage terminal 77 with respect to the female high-voltage terminals 77 There is a concern that the length in the direction of disconnection, that is, the vertical length (total height) of the connecting high voltage terminal 77 becomes longer, which may lead to an increase in the weight and cost of the service plug.

  In view of the above-described points, the present invention is a method in which the connection high-voltage terminal is removed in the direction of disconnection when the connection high-voltage terminal is separated from the pair of high-voltage terminals with a time difference after the connection signal terminal is released from the pair of signal terminals. An object of the present invention is to provide a circuit interrupting device capable of reducing the length.

  In order to achieve the above object, a circuit interrupting device according to claim 1 of the present invention comprises a service plug that is fitted to and detached from a plug receptacle, and the plug receptacle is connected to a pair of high-voltage circuits following a high-voltage circuit. And a pair of signal terminals following the signal circuit for causing the high-voltage circuit to be intermittently connected, and the service plug includes a connection high-voltage terminal for connecting the pair of high-voltage terminals, and the pair of signal terminals. A circuit interrupting device having a connection signal terminal to be connected, wherein a pressing portion that presses a pressed portion of the connection high voltage terminal in a direction in which the service plug is detached is provided on a plug housing of the service plug, and the service plug In the connected state between the pair of high-voltage terminals and the connection high-voltage terminals at the time of fitting with the plug receiver, a gap in the separation direction is provided between the pressing portion and the pressed portion, and the connection Pair with high voltage terminal Te, characterized in that the plug housing is movable in the connection signal terminal and said leaving direction together with the range of the gap.

  With the above configuration, at the same time when the service plug is fitted to the plug receptacle, the connection high-voltage terminal is connected to the pair of high-voltage terminals, and the connection signal terminal is connected to the pair of signal terminals, thereby energizing the high-voltage circuit. Is called. In this state, the pressing portion is positioned in the terminal connection direction (service plug fitting direction) with respect to the pressed portion, and a gap is generated between the pressing portion and the pressed portion. In this state, when the service plug is detached from the plug receptor to shut off the high-voltage circuit, the plug housing is connected to the pair of high-voltage terminals (the connection is maintained), and the plug housing is connected to the pressing portion. It moves in the direction of separation within the gap between the pressing part, the pressing part comes into contact with the pressed part and the gap disappears, and from this state, the pressing part, that is, the plug housing, moves the pressed part, that is, the connection high-voltage terminal, in the releasing direction. Move. The connection signal terminal moves in the detaching direction together with the plug housing. In this way, since the connection high-voltage terminal does not move in the separation direction in the range of the gap between the pressing portion and the pressed portion, the connection high-voltage terminal can be shortened in the separation direction by the length of this non-moving range. it can.

  The circuit interrupting device according to claim 2 is the circuit interrupting device according to claim 1, wherein the pressing portion is a part of a frame wall provided in the plug housing, and the pressed portion is the connection high voltage terminal. It is the protrusion provided in.

  With the above configuration, when the service plug is fitted / detached to / from the plug receiver, the frame wall acts as a guide for the protrusion, and the protrusion is positioned along the frame wall in the fitting / detaching direction. It moves smoothly, and the connection and disconnection of the connection high-voltage terminal to the pair of high-voltage terminals is performed smoothly and reliably.

  The circuit interrupting device according to claim 3 is the circuit interrupting device according to claim 1 or 2, wherein the plug housing moves in the detaching direction, the pressing portion abuts on the pressed portion, and the gap is eliminated. In this case, the connection signal terminal is detached from the pair of signal terminals.

  With the above configuration, the connection signal terminal and the pair of signal terminals are disconnected, the signal circuit is interrupted, and the high-power circuit is accordingly interrupted, and then the pressing part presses the pressed part in the disconnecting direction to connect The high power terminals start to detach from the pair of high power terminals. At the moment of disconnection of the connection circuit, strong power remains in the high voltage circuit, but the connection high voltage terminal does not move relative to the pair of high voltage terminals and maintains the same large contact area as when connected, The fear of generating a spark when the connection high-voltage terminal is detached is surely eliminated.

  According to the first aspect of the present invention, when the service plug is detached from the plug receptacle, the connection high-voltage terminal does not move in the separation direction in the range of the gap between the pressing portion and the pressed portion. The connecting high voltage terminal can be shortened in the direction of separation by the length of the range. Thereby, a connection high electrical terminal can be reduced in weight and cost. Along with this, the plug housing in which the connection high-voltage terminal is arranged can be shortened in the detaching direction to reduce the weight and the cost.

  According to the second aspect of the present invention, when the service plug is fitted to or detached from the plug receptor, the frame wall acts as a guide portion for the protrusion, and the connection of the connection of the high voltage terminal to the pair of high voltage terminals is performed. -The separation can be performed smoothly and reliably.

  According to the invention of claim 3, even if strong power remains in the high voltage circuit at the moment of interruption of the signal circuit, by contacting the connection high voltage terminal to the pair of high voltage terminals in the same large area as when connected, It is possible to reliably prevent the occurrence of sparks when the connection high-voltage terminal is detached from the pair of high-voltage terminals.

It is an appearance perspective view showing one embodiment of a circuit interruption device of the present invention. It is a perspective view which cut | disconnects and shows the principal part of the service plug of a circuit interruption apparatus. (A) is AA sectional drawing of FIG. 1 which shows a circuit interruption apparatus, (b) is sectional drawing which similarly shows an effect | action. It is the front view which made the lever part the cross section which shows one form of the conventional circuit interruption device. It is sectional drawing which similarly shows the effect | action of a lever part. It is sectional drawing which shows one form of the connection structure of the existing high voltage terminal.

  1 to 3 show an embodiment of a circuit interrupting device of the present invention. 1 is an external view of a circuit interrupting device, FIG. 2 is a diagram showing a main part of a service plug of the circuit interrupting device, FIG. 3A is a cross-sectional view corresponding to AA in FIG. 1, and FIG. Is a figure which similarly shows an effect | action.

  This circuit interrupting device 1 is composed of an upper service plug 2 and a lower plug receptacle 3, and a male connection high-voltage terminal 4 (FIG. 2) on the service plug 2 side is paired with a pair on the plug receptacle 3 side. Is connected with a gap (play, play) 21 (FIGS. 2 and 3) having a certain length (range) L in the vertical direction (insertion and removal direction) to the female high-voltage terminal 5 (FIG. 3). It is what I did.

  As shown in FIG. 1, an insulating resin plug housing 6 of the service plug 2 has a lever 7 for low-strength operation pointing upward (counterclockwise) as indicated by an arrow B with an intermediate shaft portion 8 as a fulcrum (center). It is provided in a freely rotatable manner. The lever 7 includes an operation portion 9 on the rotation tip side (right side) and a pair of front and rear vertical plate portions 10 extending from the operation portion 9 toward the left.

  Each plate portion 10 includes a bearing hole 11 for engaging the pair of front and rear shaft portions 8 of the plug housing 6 and a curved cam groove (cam hole) 12 that protrudes downward on the lower side of the bearing hole 11. Is provided. A short cylindrical engagement pin 14 of a receiver housing 13 of the plug receiver 3 is slidably engaged with the cam groove 12. The engaging pin 14 is positioned on the right end (starting end) 12a side of the cam groove 12 when the lever 7 of FIG. The inward shaft portion (8) provided on the lever 7 may be rotatably engaged with a hole portion (not shown) of the outer wall 22 of the plug housing 6.

  In the present embodiment, the upward direction is the direction in which the service plug 2 is detached from the plug receiver 3, the downward direction is the same as the fitting direction of the service plug 2, the left-right direction is the alignment direction of the pair of female high-voltage terminals 5 in FIG. The front-rear direction indicates the thickness direction of the male connection high-voltage terminal 4. These directions in the up / down / left / right and front / rear directions are for convenience of explanation and do not necessarily coincide with the mounting direction of the service plug 2.

  The plug housing 6 has vertical wall portions (front and rear wall portions 15 and 16 shown in FIG. 2 and left and right wall portions 17 and 17 shown in FIG. 3A). The peripheral wall 18 (FIG. 2) surrounding the four sides with the wall portions 15 to 17 is formed. As shown in FIG. 2, the front, rear, left and right wall portions 15 to 17 continue perpendicular to the horizontal upper wall 19, and a lower opening 20 a is formed facing the upper wall 19, and the lower opening 20 a is a space in the plug housing 6. 20 communicates. A hood wall 22 is suspended from the outer peripheral side of the upper wall 19 outside the upper half of the peripheral wall 18, and a waterproof packing 23 is disposed inside the hood wall 22. A shaft portion 8 for supporting lever rotation is provided on the front and rear outer surfaces of the hood wall 22.

  As shown in FIG. 2, a plate-like male connection high-voltage terminal 4 is slidably arranged in the vertical direction along the inner surface of the front wall 16 inside the plug housing 6. The male connection high voltage terminal 4 has a protrusion (pressed portion) 24 on the upper side. The male connection high-voltage terminal 4 includes a pair of left and right vertical tab-shaped electrical contact portions 25 and a connecting plate portion 26 that integrally connects the upper half sides of the pair of electrical contact portions 25. The connecting plate portion 26 has vertical front and rear outer surfaces, and continues to the electrical contact portions 25 at the left and right ends.

  As shown in FIG. 3A, a pair of left and right protrusions (pressed parts) 24 are provided on the connecting plate part 26 of the male connection high voltage terminal 4. As shown in FIG. 2, each protrusion 24 has an upward inclined surface 24 a and a downward horizontal receiving surface (lower surface) 24 b, and forms two sides having a triangular cross section by pressing from the connecting plate portion 26. It is formed by cutting and raising as a unit.

  As shown in FIG. 2, the plug housing 6 is configured so that the lower surface 24 b of the projecting portion 4 abuts on the lower side of the projecting portion 24 of the male connection high-power terminal 4 and the lowest point position (bottom dead center) of the connection high-power terminal 4. ) Is provided. The pressing portion 27 in this example is a connecting side portion (27) at the lower end of the frame wall 28 that is suspended from the upper wall 19 of the plug housing 6.

  In this example, a pair of protrusions 24 are provided in parallel at the same height on the left and right of the rear surface of the connecting plate portion 26 of the male connection high-voltage terminal 4. The frame wall 28 is provided in parallel at the same left and right height in the plug housing 6.

  For example, the right protrusion 24 and the frame wall 28 may be disposed on the rear surface side of the connecting plate portion 26, and the left protrusion 24 and the frame wall 28 may be disposed on the front surface side of the connecting plate portion 26. . It is also possible to arrange the pair of protrusions 24 at different heights and to arrange the pair of frame walls 28 at the same height as the protrusions 24.

  Further, in FIG. 2, a pair of left and right guide grooves (not shown) in the vertical direction are provided on the inner surface side of the front wall 16 of the plug housing 6, and each electrical contact portion 25 of the male connection high voltage terminal 4 is provided in each guide groove. It is also possible to engage the slidably up and down direction. On the inner surface of the front wall 16 of the plug housing 6, for example, there are longitudinal ribs (not shown) for sliding the outer surface (front surface) of the connecting plate portion 26 of the male connection high voltage terminal 4 with a small contact area. It is preferable that a plurality of them be provided in parallel.

  The frame wall 28 is constituted by a pair of left and right vertically and vertically supporting side portions 29 (FIG. 2) and a short lateral (horizontal) connecting side portion 27 that connects the lower ends of the pair of supporting side portions 29. Yes. Each support side portion 29 has flexibility in the front-rear direction, and in the state where each support side portion 29 is bent backward, the upward inclined surface 24 a of the projecting portion 24 of the connection high voltage terminal 4 is connected to the connection side portion 27. The protrusion 24 can smoothly enter and engage in the frame wall 28 by sliding.

  The protrusion 24 (FIG. 2) has an upward inclined surface 24 a and a horizontal receiving surface (pressed surface) 24 b that is a lower surface with respect to the upper surface (pressing surface) of the connecting side portion (hereinafter referred to as a pressing portion) 27. doing. In FIG. 2, only the right frame wall 28 is shown corresponding to the right protrusion 24, but as shown in FIG. 3, the left and right protrusions 24 and the frame wall 28 are provided in pairs.

  2 and 3 (a), the service plug 2 and the plug receiving portion 3 are completely fitted (the male / female high-voltage terminals 4, 5 are connected and the male / female signal terminals 30, 31 are connected). ), The vertical dimension (range) L of the gap (play / play) 21 between the lower surface 24b of the protrusion (pressed portion) 24 and the upper surface 27a of the pressing portion 27 is set large. The dimension L of the gap 21 is such that the connection signal terminal 30 in FIG. 3A is connected to the pair of signal terminals 31 and is separated upward from the pair of signal terminals 31 as shown in FIG. It is almost equal to the moving dimension at the time. For example, the dimension L of the gap 21 is about the same as the vertical length of the protrusion 24. The pressing portion 27 is located greatly below the protrusion 24.

  In this example (as an example), as shown in FIG. 3, vertical ribs 33 in the vertical direction are provided on the upper wall 19 of the plug housing 6, for example, on the left and right outer sides of the pair of left and right frame walls 28. A second projection 34 is provided on the connecting plate portion 26 of the connection high-voltage terminal 4 of the mold so that the lower end surface 33 a of the rib 33 abuts.

  The second protrusion 34 protrudes laterally (in the left-right direction) at the lower end side of the connecting plate portion 26 with the same plate thickness as the connecting plate portion 26. The upper surface 34a of the second protrusion 34 is formed horizontally. The lower end surface 33a of the rib 33 acts as a pressing surface that presses the second protrusion 34 of the male connection high-voltage terminal 4 downward (terminal connection direction). The rib 33 acts as a second pressing portion that presses the connection high power terminal 4 downward (in the insertion connection direction with respect to the high power terminal 5) against the pressing portion 27 that presses the connection high power terminal 4 upward. The protrusion 34 acts as a second pressed part. In FIG. 3A, the lower end surface 33 a of the rib 33 is in contact with the upper surface 34 a of the second protrusion 34.

  Instead of the rib 33, a rib 35 (shown by a chain line) shorter than the rib 33 is provided on the lower surface of the upper wall 19 of the plug housing 6 in FIG. It is also possible to press the upper end surface 26a of the four connecting plate portions 26 downward.

  3A, the height of the connecting plate portion 26 of the connection high voltage terminal 4 is extended upward, or the height of the upper wall 19 of the plug housing 6 is set lower than that in FIG. Without using the ribs 33, 35, the upper end surface 26 a of the connecting plate portion 26 of the connection high voltage terminal 4 is brought into contact with the lower surface of the upper wall 19 of the plug housing 6, and the connecting plate portion 26 is directly directed downward by the upper wall 19. It is also possible to connect the high voltage terminal 4 to the pair of female high voltage terminals 5 by pushing. This configuration is preferable for simplifying the structure.

  The horizontal flange wall 36 of the receiver housing 13 of the plug receiver 3 in FIG. 1 is a horizontal wall portion (hereinafter referred to as the vehicle body side) of a battery pack of an electric vehicle including a hybrid car as shown in FIG. It is fixed to the wall 37) by bolting through a waterproof packing 38. The wall portion 37 on the vehicle body side is provided with a vertical hole portion (upward opening) 39.

  The lower half of the outer peripheral wall 40, which is a front, back, left, and right vertical wall portion of the receiver housing 13, enters and engages in the hole 39, and the flange wall 36 is orthogonal to the intermediate portion in the height direction of the outer peripheral wall 40. Subsequently, the peripheral wall 18 formed of the wall portions 15 to 17 of the plug housing 6 is inserted between the outer and inner peripheral walls 40 and 41 through the waterproof packing 42 along the inner surface of the upper half of the outer peripheral wall 40. The hood portion 22 of the plug housing 6 is disposed along the outer surface of the upper half portion of the outer peripheral wall 40.

  The peripheral walls 40 and 41 of the receiver housing 13 are double walls on the lower half side, and are formed in a pair of left and right terminal accommodating chambers 44 between the left and right wall portions of the inner peripheral wall 41 and the central wide partition wall 43. A pair of left and right female high-voltage terminals 5 are accommodated and locked by a locking member (not shown) and the like so as not to be pulled out downward. The upper wall 45 on the upper end side of the inner peripheral wall 41 and the partition wall 43 The upward movement is blocked.

  The upper wall 45 of the receiver housing 13 is provided with a slit-like opening 46 for inserting the pair of left and right tab-like electric contact portions 25 of the male connection high-voltage terminal 4. Each female high-voltage terminal 5 is connected to each electric wire forming a high-voltage circuit (not shown). For example, one electric wire is connected to a high-voltage battery on the power source side, and the other electric wire is connected to a motor or inverter on the load side.

  Each of the female high-power terminals 5 in this example includes an upward vertical female-type electrical contact portion 47 and a wire connection portion 48 that is bent in an L shape in the horizontal direction from the lower end side of the electrical contact portion 47. It is configured. The electrical contact portion 47 is composed of a rectangular cylindrical portion 49 and an elastic contact portion 50 accommodated and fixed separately in the rectangular cylindrical portion 49, as shown in FIG. The contact part 50 has a plurality of elastic contact pieces 51 arranged in parallel in the vertical direction. It is also possible to cut and raise the elastic contact piece 51 integrally with the rectangular cylindrical portion 49 of the electric contact portion 47.

  As shown in FIG. 3A, a pair of female signal terminals 31 smaller than the high power terminal 5 are fixed to the lower side of the central partition wall 43 of the receiver housing 13 between the pair of female high power terminals 5. It is established immovably. Each signal terminal 31 is connected to each signal line (electric wire) (not shown), and the signal line is connected to a relay (not shown) and a power source on the low power side.

  A male connection signal terminal 30 is fixed to the plug housing 6 and immovably provided above each female signal terminal 31. The male connection signal terminal 30 is composed of a pair of vertical left and right tab-shaped or pin-shaped electrical contact portions 30a and a connecting side portion 30b integrally connecting the upper ends of the pair of electrical contact portions 30a. The connection high-power terminal 4 is formed to be smaller.

  FIG. 3A shows a state in which the operation lever 7 is tilted horizontally corresponding to FIG. In this state, the male and female high voltage terminals 4 and 5 are connected to each other, and the male and female signal terminals 30 and 31 are connected to each other. A pair of female high-voltage terminals 5 are connected via a male connection high-voltage terminal 4, and a pair of female signal terminals 31 are connected via a male-type connection signal terminal 30. When the male and female signal terminals 30 and 31 are connected, the signal (control) circuit is energized, the relay (not shown) is turned on, and a strong current is supplied to the high voltage circuit including the male and female high voltage terminals 4 and 5. Is energized.

  In the state of FIG. 3A, a large gap (play / play) 21 having a dimension L between the pressing portion 27 at the lower end of the frame wall 28 in the plug housing 6 and the protruding portion 24 of the male connection high-voltage terminal 4. Is set. The protrusion 24 is located above the pressing portion 27 with a gap 21 therebetween. As shown in FIG. 1, a curved cam groove 12 extends in the left and right (longitudinal) direction of the front and rear plate portions 10 of the lever 7 that is tilted horizontally, and the shaft portion 8 of the plug housing 6 that rotatably supports the lever 7. On the lower side, the front and rear engagement pins 14 of the receiver housing 13 are engaged with the right end of the cam groove 12.

  During maintenance or transportation of the vehicle, the operator pulls up the eaves wall 9a on the upper end side of the operation portion 9 on the right end side of the lever 7 from the state shown in FIG. By rotating counterclockwise along the non-moving engagement pin 14 in the center and gradually increasing the vertical distance between the engagement pin 14 and the shaft portion 8, as shown in FIG. The plug 2 moves vertically upward with respect to the plug receiver 3, and is detached upward from the plug receiver 3.

  The male connection high-voltage terminal 4 during the period from the tilted state of the lever 7 in FIG. 3A to the rotation intermediate position of the lever 7 in FIG. 3B, that is, in the process of detaching the service plug 2 from the plug receptor 3. Is maintained in the state shown in FIG. 3A while being connected to the pair of female high-voltage terminals 5, and only the plug housing 6 moves vertically upward. The left and right frame walls 28 rise integrally with the plug housing 6, and the upper surface 27 a of the pressing portion 27 at the lower end of each frame wall 28 abuts on the lower end surface 24 b of each protrusion 24 of the male connection high-voltage terminal 4, This is an initial state for pulling up the male connection high-voltage terminal 4.

  In FIG. 3B, the male connection signal terminal 30 rises integrally with the plug housing 6 and detaches upward from the pair of female signal terminals 31 of the plug receiver 3, so that both signal terminals 30, 31 has been disconnected.

  In addition, the downward pressing ribs 33 and 35 and the upper wall 19 of the plug housing 6 with respect to the male connection high-voltage terminal 4 are raised integrally with the plug housing 6. The lower end surface of the rib 33 is spaced apart from the upper surface 34 a of the second protrusion 34 of the connection high-voltage terminal 4 by a dimension L perpendicular to the upper side, and the lower end surface of the rib 35 is the connection plate portion 26 of the male connection high-voltage terminal 4. It is spaced apart from the upper end 26a by a vertical dimension L. 3A, when the upper wall 19 of the plug housing 6 is brought into direct contact with the upper end 26a of the connecting plate portion 26 of the connection high voltage terminal 4, the upper wall 19 is connected to the connection high voltage terminal 4 in FIG. The connecting plate portion 26 is separated from the upper end 26a by a dimension L perpendicular to the upper side.

  In FIG. 3B, when the male and female signal terminals 30 and 31 are disconnected, the relay (not shown) is turned off, the high voltage circuit is cut off, and the connection between the male and female high voltage terminals 4 and 5 is performed. The energization of the strong current is stopped.

  When the lever 7 is further lifted and rotated counterclockwise from the state of FIG. 3 (b), the plug groove is caused by the action of the cam groove 12 of the lever 7 and the engaging pin 14 of the receiver housing 13 in FIG. 6 rises, each frame wall 28 rises integrally with the plug housing 6, and raises each protrusion 24 of the male connection high-voltage terminal 4 integrally with the connection high-voltage terminal 4.

  As a result, the male connection high-voltage terminal 4 is detached upward from the pair of female high-voltage terminals 5. The lever 7 rotates to a state where the lever 7 stands upright, and the engagement pin 14 is positioned on the end 12b side of the cam groove 12 (FIG. 1). In the turning process of the lever 7, the male / female high-voltage terminals 4, 5 are already cut off by the detachment of the male / female signal terminals 30, 31. It is possible to prevent a spark from being generated at the moment when 4 is pulled up by each frame wall 28 of the plug housing 6 and detached from each female high-voltage terminal 5.

  Further, during the turning process of the lever 7 in the pulling direction, a gap (play / play) 21 having a dimension L between the pressing portion 27 of the frame wall 28 of the plug housing 6 and the protruding portion 24 of the male connection high-voltage terminal 4. By providing the time until the gap 21 disappears, the release of the male connection high-voltage terminal 4 from each female high-voltage terminal 5 is delayed so that the male and female signal terminals 30 and 31 are separated from each other. A time difference (time lag) until the male / female high-voltage terminals 4 and 5 are released can be secured, and the occurrence of the spark can be surely prevented.

  Thereby, for example, the lever erroneous operation preventing mechanism for securing the stop time at the intermediate rotation position of the lever 73 in the conventional example of FIGS. 4 to 5 is omitted, and the structure of the lever 7 and the lever operation are simplified. be able to.

  As shown in FIG. 3B, the operation portion 9 of the lever 7 of this example includes an upper half outward (rightward) operation arm 52 and an inward (leftward) engagement arm connected to the operation arm 52. 53. For example, when the operation arm 52 is tilted outward (right side) from the state of FIG. 3A, the engagement between the locking arm 53 and the plug housing 6 is released, and the lever 7 can be pulled up.

  Further, the male connection high-voltage terminal 4 does not move upward from the fitting state of the plug housing 6 to the receptor housing 13 of FIG. 3A to the intermediate disengagement state of the plug housing 6 of FIG. 4, the male connection high-voltage terminal (not shown) moves upward by the dimension L of the gap 21 in FIG. 3 in the detached state of the plug housing 72 in the conventional example of FIG. The vertical length of the connection high voltage terminal 4 can be shortened by the dimension L of the gap 21.

  That is, the dimension L of the gap (play / backlash) 21 in the height direction between the male connection high-voltage terminal 4 and the plug housing 6 is equal to that between the connection high-voltage terminal and the plug housing 72 in the conventional example of FIG. Until the plug housing 6 moves upward by the dimension L of the gap 21, it is set to be extremely larger than the vertical assembly play (there is no protrusion 24 of the connection high voltage terminal 4 or the pressing portion 27 of the plug housing 6 in the prior art). The male connection high-voltage terminal 4 is prevented from moving upward. At this time, the male connection signal terminal 30 is moved upward by the dimension L of the gap 21.

  When the male / female signal terminals 30 and 31 are disconnected, that is, when the signal circuit is interrupted, the electrical contact portion 25 of the male connection high-voltage terminal 4 is in the height direction within the electrical contact portion 47 of each female high-voltage terminal 5. Although it is necessary to be in contact with all of the plurality of elastic contact pieces 51 (FIG. 6) in parallel with each other, the male connection signal terminal 30 is moved upward by the dimension L of the gap 21. The amount of upward movement of the connection high-power terminal 4 can be kept small.

  In this way, the upward movement amount of the male connection high-voltage terminal 4 until the signal circuit is interrupted can be made zero or almost zero, so that the height direction of the male connection high-voltage terminal 4 is higher than that of the conventional example of FIG. Can be reduced by an amount corresponding to the L dimension or substantially the L dimension. By shortening the male connection high power terminal 4 in the height direction and reducing the height, the plug housing 6 that accommodates the connection high power terminal 4 can be made compact (low in height) in the height direction.

  When the amount of upward movement of the male connection high-voltage terminal 4 until the signal circuit is interrupted is not zero but slightly, the male connection signal terminal 30 slightly contacts the female signal terminal 31 in FIG. In this state, the upward movement of the lever 7 starts the upward movement of the male connection high-voltage terminal 4, and the male connection signal terminal 30 is detached from the female signal terminal 31. Then, the male connection high-voltage terminal 4 is detached from each female high-voltage terminal 5.

Even in this case, as shown in FIG. 6, the tip (lower end) 25 a of the electrical contact portion 25 of the male connection high-voltage terminal 4 is inserted below the lowermost elastic contact piece 51 ₁ of the female high-voltage terminal 5. Therefore, even if the upward movement of the male connection high-voltage terminal 4 is started, contact with all the elastic contact pieces 51 is ensured, and in this state, the male connection signal terminal 30 is connected to the female signal. Detach from terminal 31. Immediately before the lever 7 is completely turned upward to stand up, the male connection high-voltage terminal 4 is completely detached from the female high-voltage terminals 5.

  When the service plug 2 is fitted and connected to the plug receiver 3 from the standing state of the lever 7, the lever 7 is rotated clockwise in the opposite direction, and the cam groove 12 (FIG. 1) of the lever 7 is rotated. The engaging pin 14 engaged with the left end 12b side is moved to the right end 12a side of the cam groove 12 with the rotation of the lever 7 (actually, since the engaging pin 14 does not move, the cam groove 12 moves). As a result, the vertical distance between the shaft portion 8 on the lever 7 side and the engaging pin 14 gradually decreases, and the service plug 2 is fitted into the plug receiver 3.

  In this process, for example, the lower end surface of the long vertical rib 33 of the plug housing 6 (FIG. 3) presses the upper end surface of the second protrusion 34 of the male connection high-voltage terminal 4 downward, or the plug housing 6 (FIG. 3), the lower end surface of the vertical short rib 35 presses the upper end 26a of the male connection high-voltage terminal 4 downward, or the lower surface of the upper wall 19 of the plug housing 6 is the male connection high-voltage terminal 4 The upper end 26a is pressed downward, and the pair of electrical contact portions 25 of the male connection high-voltage terminal 4 is inserted into each of the female high-voltage terminals 5 (illustration of this state is omitted).

  Then, at the intermediate rotation position of the lever 7 and the intermediate fitting position of the plug housing 6 in FIG. 3B, for example, the pair of electrical contact portions 25 of the male connection high-voltage terminal 4 is a pair of female high-voltage terminals. 5 is not completely inserted into the electrical contact portion 47 (the insertion depth of the tip 25a of the electrical contact portion 25 is shallower than in FIG. 3B), and each of the electrical contact portions 25 is a female high-voltage terminal. 5 contacts with all the elastic contact pieces 51 (FIG. 6) in the electrical contact portion 47. In this state, the male connection signal terminal 30 is positioned close to the upper end of the female signal terminal 31 in a non-contact manner (a diagram showing this state is omitted).

  By rotating the lever 7 further downward from this state, each electrical contact portion 25 of the connection high-voltage terminal 4 is completely within the electrical contact portion 47 of each high-voltage terminal 5 as shown in FIG. The male connection signal terminal 30 is inserted and connected to the female signal terminal 31. The male / female signal terminals 30 and 31 are connected after the male / female high-voltage terminals 4 and 5 are connected, and the relay is turned on by energizing the signal circuit to energize the high-voltage circuit. There is no spark between 4 and 5.

  The pair of left and right frame walls 28 of the plug housing 6 descends along the protrusions 24 of the male connection high-voltage terminal 4, as shown in FIG. The plug housing 6 is completely fitted to the receiver housing 13 with the gap 21 having a dimension L in the height direction between the pressing portion 27 and the pressing housing 27.

  At least the plug housing 6, the male connection high-voltage terminal 4 and the male connection signal terminal 40 constitute the service plug 2, and at least the receiver housing 13, the female pair of high-voltage terminals 5, and the female pair of signals. The plug receiver 3 is constituted by the terminal 31.

  In the above embodiment, the protruding portion 24 (FIG. 2) of the connection high voltage terminal 4 is formed with the upward inclined surface 24 a and the downward horizontal surface (pressed surface) 24 b. A second pressing portion (not shown) that forms an upper surface (not shown) and a horizontal lower surface 24 b and connects the pair of left and right long side portions 29 at the height direction intermediate portion of the frame wall 28 of the plug housing 6. It is also possible to insert the male connection high power terminal 4 into the female high power terminal 5 by pressing the horizontal upper surface of the projection 24 downward with the horizontal lower surface of the second pressing portion. .

  Moreover, in the said embodiment, although the protrusion 24 (FIG. 2) of the connection high voltage terminal 4 demonstrated as what has two sides of the longitudinal cross-section triangle shape by the upward inclined surface 24a and the downward horizontal surface 24b, Instead, it is possible to cut and raise the protrusion 24 as a single inclined protrusion (not shown) from the connecting plate portion 26 of the connection high-voltage terminal 4. In this case, the projecting tip (lower end) of the projecting piece comes into contact with the upper surface of the pressing portion 27 of the frame wall 28 in a form close to line contact rather than surface contact.

  Moreover, in the said embodiment, although the press part 27 was formed in a part (lower end part) of the frame wall 28, for example, in FIG. 2, a perpendicular | vertical intermediate wall (FIG. 2) facing the front wall 16 of the plug housing 6 is shown. (Not shown) are integrally provided, and the male connection high-voltage terminal 4 is disposed between the front wall 16 and the intermediate wall so as to be slidable in the vertical direction, and a horizontal rib-shaped or hook-shaped pressing portion is provided on the front surface of the intermediate wall. In the state of FIG. 3A, the pressing portion is disposed with a gap 21 having a dimension L below the protruding portion 24, and the horizontal upper surface of the pressing portion is positioned in the state of FIG. It is also possible to push the contact high-voltage terminal 4 against the lower surface of the projection 24 and pull the connection high-voltage terminal 4 upwardly from the female high-voltage terminal 5 so as to be detached.

  In this case, for example, the upper and lower surfaces 24a, 24b of the protrusion 24 of FIG. 2 are formed horizontally, and a rib-shaped or bowl-shaped second pressing portion (not shown) is formed on the vertical intermediate wall (not shown) of the plug housing 6. When the service plug 2 is fitted and connected to the plug receiver 3, the upper surface of the projecting portion 24 is pressed downward with the horizontal lower surface of the second pressing portion. It is also possible to insert and connect the terminal 4 to the female high voltage terminal 5. The second protrusions 34 at the left and right ends of the connection high voltage terminal 4 in FIG. 3 and the ribs 33 and 35 of the plug housing 6 are not necessary.

  Moreover, in the said embodiment, although the left-right paired frame wall 28 and the protrusion 24 are provided, the detachability of the comparatively wide connection high voltage terminal 4 from a pair of female type high voltage terminals 5 is improved, In the case where the lateral width of the connection high power terminal 4 is narrow, it is also possible to arrange one protrusion 24 and one frame wall 28 in the center of the connection high power terminal 4.

  Moreover, in the said embodiment, although the frame wall 28 was provided in the plug housing 6 and the protrusion 24 was provided in the male connection high voltage terminal 4, it replaces with the frame wall 28 in the connection board part 26 of the connection high voltage terminal 4. A vertically long slot (not shown) as a pressed portion is provided, and a rectangular or cylindrical shape as a pressing portion is provided on the vertical front wall 16 or an intermediate wall (not shown) of the plug housing 6 instead of the protrusion 24. It is also possible to provide a protrusion (not shown) and engage the protrusion in the elongated hole so as to be slidable in the vertical direction.

  In this case, a protrusion (not shown) is arranged on the lower end side of the long hole (not shown) in the fully fitted state of the service plug 2 of FIG. 3A, and the protrusion and the upper end of the long hole are arranged. A gap (play) 21 having a dimension L is provided between them, and a protrusion is arranged on the upper end side of the long hole in the middle of detachment of the service plug 2 in FIG. The protrusion pushes the upper end of the long hole upward by the moving operation, and the connection high-voltage terminal 4 having the long hole is detached from the female high-voltage terminal 5. In addition, when the connection high-voltage terminal 4 is inserted and connected to the female high-voltage terminal 5 from this state, the lower end of the long hole can be pushed downward by the protrusion.

  Further, in the above embodiment, the male connection high-voltage terminal 4 is arranged on the service plug 2 and the pair of female high-voltage terminals 5 is arranged on the plug receiver 3, but conversely, the service plug 2 It is also possible to arrange a female connection high-voltage terminal (not shown) on the plug receiver 3 and a pair of male high-voltage terminals (not shown). In this case, the female connection high voltage terminal (not shown) in the service plug 2 is composed of a pair of left and right female electrical contact portions and a connecting plate portion that connects the pair of electrical contact portions. The plate portion is provided with a protrusion 24 or a second protrusion 34 as a pressed portion as in the example of FIG. 3, for example.

  Similarly, a female connection signal terminal (not shown) can be disposed on the service plug 2, and a pair of male signal terminals (not illustrated) can be disposed on the plug receiver 3. In this case, the female connection signal terminal (not shown) includes a pair of left and right female electrical contact portions and a connecting plate portion that connects the pair of electrical contact portions. In addition, the arrangement of the connection high-voltage terminal 4, the pair of high-voltage terminals 5, the connection signal terminal 30 and the pair of signal terminals 31 is not limited to the horizontal direction of the service plug 2 or the plug receiver 3, but can be the front-rear direction. .

  In the above embodiment, the lever 7 is used to reduce the operating force required to insert the male and female high voltage terminals 4 and 5, and after the male and female signal terminals 30 and 31 are detached, A time difference for disconnecting the high-power terminals 4 and 5 and a time difference for connecting the male and female signal terminals 30 and 31 after the connection of the male and female high-power terminals 4 and 5 are obtained.

  In this regard, for example, a male / female signal is present in a gap (play / backlash) 21 between the protrusion 24 and the pressing portion 27 of the frame wall 28 in the process of FIGS. 3 (a) to 3 (b). Earn a time difference for detaching the male / female high-voltage terminals 4 and 5 after the terminals 30 and 31 are disconnected and a time difference for connecting the male / female signal terminals 30 and 31 after the male / female high-voltage terminals 4 and 5 are connected. Therefore, if the operating force is reduced (if the operating force required to insert the male and female high voltage terminals 4 and 5 is small), the service plug 2 is operated on the plug receptor 3 without using the lever 7. It is also possible to make a direct fitting connection with the power of the person's hand.

  In addition, the circuit interrupting device of the present invention can be appropriately modified according to conventionally known knowledge. Of course, such modifications are included in the scope of the present invention as long as the configuration of the circuit interrupting device of the present invention is provided.

  In the circuit interrupting device of the present invention, when the connection high-voltage terminal is separated from the pair of high-voltage terminals with a time difference after the connection signal terminals are separated from the pair of signal terminals, the length of the connection high-voltage terminals in the separation direction is increased. Can be used to shorten.

DESCRIPTION OF SYMBOLS 1 Circuit interruption device 2 Service plug 3 Plug acceptor 4 Connection high electric terminal 5 High electric terminal 6 Plug housing 21 Gap 24 Projection (pressed part)
27 Connecting side (pressing part)
28 Frame Wall 30 Connection Signal Terminal 31 Signal Terminal L Dimensions (Range)

Claims (3)

A service plug for fitting / removing from / to the plug receptacle, the plug receptacle being connected to a pair of high voltage terminals following the high voltage circuit, and a pair of signal terminals following the signal circuit for interrupting the high voltage circuit And the service plug includes a connection high-voltage terminal for connecting the pair of high-voltage terminals, and a connection signal terminal for connecting the pair of signal terminals,
The pair of high-voltage terminals when the service plug and the plug receiver are fitted to each other are provided with a pressing portion for pressing the pressed portion of the connection high-voltage terminal in the service plug detachment direction. And a gap between the pressing portion and the pressed portion are provided in a connected state between the plug and the high voltage terminal, and the plug housing is within the gap within the gap with respect to the high voltage terminal. A circuit interrupting device characterized by being movable in the direction of separation together with a connection signal terminal.   2. The circuit interruption according to claim 1, wherein the pressing portion is a part of a frame wall provided in the plug housing, and the pressed portion is a protrusion provided in the connection high voltage terminal. apparatus.   The connection signal terminal is detached from the pair of signal terminals when the plug housing moves in the separation direction, the pressing portion comes into contact with the pressed portion, and the gap disappears. The circuit interrupting device according to claim 1 or 2.

Images