JP4618095B2 - Outlet - Google Patents

Description

  The present invention relates to an outlet having a ground terminal to which a ground wire is connected.

  Conventionally, an outlet having a ground terminal 2 as shown in FIG. 17 is provided as an outlet having a ground terminal to which a ground wire is connected.

  The ground terminal 2 includes a ground terminal plate 21 having a screw hole 21a opened in the front surface (left surface in FIG. 17), a terminal screw 22 screwed into the ground terminal plate 21, and a screw insertion hole through which the terminal screw 2 is inserted. (Not shown) and a washer 23 attached to the front side of the ground terminal plate 21 with the thickness direction in the front-rear direction by being sandwiched between the head of the terminal screw 22 and the ground terminal plate 21. . That is, a ground wire (not shown) is introduced between the washer 23 and the ground terminal plate 21 and the terminal screw 22 is tightened, whereby the ground wire is sandwiched between the ground terminal plate 21 and the washer 23 and grounded. The terminal board 21 can be electrically connected. Further, on the upper and lower ends of the washer 23 in FIG. 17, there are provided protrusions 23c and 23d that protrude into the grounding wire and prevent the grounding wire from coming off.

Further, the ground terminal 2 is housed in a terminal housing recess 12 provided on the front surface of the housing 1, and a door body 3 that opens and closes the terminal housing recess 12 is attached to the housing 1. In addition, an electric wire insertion hole 18 into which an electric wire (not shown) is inserted penetrates the bottom surface of the terminal receiving recess 12, and the electric wire inserted from the electric wire insertion hole 18 is connected to the terminal receiving recess 12 with the ground terminal plate 21. A locking spring 64 that locks between them is arranged.
Japanese Patent Laid-Open No. 10-134894

  In the above-described conventional outlet, the ground wire inserted from the lower end in FIG. 17 of the terminal housing recess 12 in the axial direction substantially in the front-rear direction (the left-right direction in FIG. 17) is grounded with the washer 23 while bending upward in FIG. Since it is introduced between the terminal board 21 and the grounding wire, the force required to insert the grounding wire is large, and it is difficult to insert the grounding wire to the depth that the upper retaining protrusion 23c bites. If the ground wire does not reach the position where the retaining protrusion 23c bites in, the holding force of the ground terminal 2 with respect to the ground wire may be insufficient, and the ground wire may drop from the ground terminal 2.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide an outlet capable of easily inserting a grounding wire to a position where a retaining protrusion provided on a washer in a grounding terminal bites into the grounding terminal. is there.

According to the first aspect of the present invention, there is provided a housing in which at least one set of plug blade insertion openings is provided on the front surface and attached to the construction surface, and each is housed in the housing and electrically connected to a power source and inserted from the plug blade insertion opening. A plurality of blade receptacles that are in contact with the plug blade, and a ground terminal that is housed in a terminal housing recess provided at an end of the front surface of the housing and to which a ground wire is connected. A grounding terminal plate having a screw hole that is fixed and opened on the front surface, a terminal screw that is screwed into the screw hole of the grounding terminal plate with the head facing forward, and a screw insertion hole through which the terminal screw is inserted A washer that is attached to the front side of the grounding terminal plate with the thickness direction facing in the front-rear direction by being sandwiched between the head of the screw and the grounding terminal plate, and sandwiches the grounding wire with the grounding terminal plate. On the outer periphery of the washer The released introduction notch is provided, and at the end of the washer in the depth direction of the introduction notch as viewed from the front, a retaining protrusion that bites into the grounding wire and prevents the grounding wire from falling off is provided rearwardly. In addition, the inner surface of the terminal storage recess is provided with a ground wire recess for storing the tip of the ground wire that is prevented from falling off by the retaining protrusion .

According to the present invention, since the dimension of the washer in the direction intersecting the edge provided with the retaining projection is reduced when viewed from the front as compared with the case where the introduction notch is not provided, the ground wire is connected from the introduction notch. When it is introduced, it becomes easy for the retaining protrusion to bite into the ground wire. Further, when the ground wire is introduced between the washer and the ground terminal plate, the degree of freedom of the position where the ground wire is introduced is improved, so that the work of connecting the ground wire to the ground terminal is facilitated. In addition, by inserting the tip of the ground wire into the ground wire recess, the position where the retaining protrusion bites into the ground wire can be further away from the tip of the ground wire, so a ground wire recess is provided. Compared to the case where the ground terminal is not provided, the holding force of the ground terminal to the ground wire can be further improved.

According to a second aspect of the invention, in the first aspect of the invention, at least a part of the inner surface near the opening of the ground wire recess is inclined in a direction to increase the inner diameter of the ground wire recess as the position is closer to the retaining protrusion. It is characterized by being.

  According to the present invention, the ground wire is more easily introduced into the ground wire recess than when the inner surface of the ground wire recess is not inclined.

The invention according to claim 3 is a housing in which at least one set of plug blade insertion ports is provided on the front surface and attached to the construction surface, and each is housed in the housing and electrically connected to the power source and inserted from the plug blade insertion port. A plurality of blade receptacles that are in contact with the plug blade, and a ground terminal that is housed in a terminal housing recess provided at an end of the front surface of the housing and to which a ground wire is connected. A grounding terminal plate having a screw hole that is fixed and opened on the front surface, a terminal screw that is screwed into the screw hole of the grounding terminal plate with the head facing forward, and a screw insertion hole through which the terminal screw is inserted A washer that is attached to the front side of the grounding terminal plate with the thickness direction facing in the front-rear direction by being sandwiched between the head of the screw and the grounding terminal plate, and sandwiches the grounding wire with the grounding terminal plate. On the outer periphery of the washer The released introduction notch is provided, and at the end of the washer in the depth direction of the introduction notch as viewed from the front, a retaining protrusion that bites into the grounding wire and prevents the grounding wire from falling off is provided rearwardly. In addition, the edge of the ground terminal plate is provided with a retaining portion that cuts into the ground wire and prevents the ground wire from falling off.

According to the present invention, since the dimension of the washer in the direction intersecting the edge provided with the retaining projection is reduced when viewed from the front as compared with the case where the introduction notch is not provided, the ground wire is connected from the introduction notch. When it is introduced, it becomes easy for the retaining protrusion to bite into the ground wire. Further, when the ground wire is introduced between the washer and the ground terminal plate, the degree of freedom of the position where the ground wire is introduced is improved, so that the work of connecting the ground wire to the ground terminal is facilitated. Further, the holding force of the ground terminal with respect to the ground wire is improved as compared with the case where the retaining portion is not provided.

According to the invention of claim 4 , there is provided a housing in which at least one set of plug blade insertion ports is provided on the front surface and attached to the construction surface, and each is housed in the housing and electrically connected to a power source and inserted from the plug blade insertion port. A plurality of blade receptacles that are in contact with the plug blade, and a ground terminal that is housed in a terminal housing recess provided at an end of the front surface of the housing and to which a ground wire is connected. A grounding terminal plate having a screw hole that is fixed and opened on the front surface, a terminal screw that is screwed into the screw hole of the grounding terminal plate with the head facing forward, and a screw insertion hole through which the terminal screw is inserted A washer that is attached to the front side of the grounding terminal plate with the thickness direction facing in the front-rear direction by being sandwiched between the head of the screw and the grounding terminal plate, and sandwiches the grounding wire with the grounding terminal plate. On the outer periphery of the washer The released introduction notch is provided, and at the end of the washer in the depth direction of the introduction notch as viewed from the front, a retaining protrusion that bites into the grounding wire and prevents the grounding wire from falling off is provided rearwardly. The washer is characterized in that it has an introduction portion whose rear surface is inclined forward in the depth direction of the introduction notch as viewed from the front, in the vicinity of the introduction notch.

According to the present invention, since the dimension of the washer in the direction intersecting the edge provided with the retaining projection is reduced when viewed from the front as compared with the case where the introduction notch is not provided, the ground wire is connected from the introduction notch. When it is introduced, it becomes easy for the retaining protrusion to bite into the ground wire. Further, when the ground wire is introduced between the washer and the ground terminal plate, the degree of freedom of the position where the ground wire is introduced is improved, so that the work of connecting the ground wire to the ground terminal is facilitated. Furthermore, since the ground wire is guided between the washer and the ground terminal plate by the rear surface of the introduction portion, it is easier to connect the ground wire to the ground terminal than when no introduction portion is provided.

According to the invention of claim 5 , at least one set of plug blade insertion ports is provided on the front surface and attached to the construction surface, and each is housed in the housing and electrically connected to the power source and inserted from the plug blade insertion port. A plurality of blade receptacles that are in contact with the plug blade, and a ground terminal that is housed in a terminal housing recess provided at an end of the front surface of the housing and to which a ground wire is connected. A grounding terminal plate having a screw hole that is fixed and opened on the front surface, a terminal screw that is screwed into the screw hole of the grounding terminal plate with the head facing forward, and a screw insertion hole through which the terminal screw is inserted A washer that is attached to the front side of the grounding terminal plate with the thickness direction facing in the front-rear direction by being sandwiched between the head of the screw and the grounding terminal plate, and sandwiches the grounding wire with the grounding terminal plate. On the outer periphery of the washer The released introduction notch is provided, and at the end of the washer in the depth direction of the introduction notch as viewed from the front, a retaining protrusion that bites into the grounding wire and prevents the grounding wire from falling off is projected backward. In addition, the end portion of the ground terminal plate in the depth direction of the introduction notch as viewed from the front is provided with an inclined portion whose front surface is inclined rearward toward the end of the ground terminal plate. An inductive portion that is opposed to the inclined portion and whose rear surface is inclined along the inclined portion of the ground terminal plate is provided.

According to the present invention, since the dimension of the washer in the direction intersecting the edge provided with the retaining projection is reduced when viewed from the front as compared with the case where the introduction notch is not provided, the ground wire is connected from the introduction notch. When it is introduced, it becomes easy for the retaining protrusion to bite into the ground wire. Further, when the ground wire is introduced between the washer and the ground terminal plate, the degree of freedom of the position where the ground wire is introduced is improved, so that the work of connecting the ground wire to the ground terminal is facilitated. Furthermore, because the ground wire is inclined with respect to the construction surface due to the inclined portion of the ground terminal plate and the guide portion of the washer, grounding viewed from the front as compared with the case where the ground wire is parallel to the construction surface. The length by which the ground wire is sandwiched between the ground terminal plate and the washer is increased relative to the dimensions of the terminal plate and the washer, so that the holding force of the ground terminal to the ground wire is improved.

  In the present invention, an introduction notch opened in the front-rear direction is provided on the outer periphery of the washer, and the end of the introduction notch in the depth direction of the introduction notch as viewed from the front bites into the ground wire to prevent the ground wire from falling off. Since the retaining protrusion is projected rearward, the size of the washer is smaller in the direction intersecting the edge where the retaining protrusion is provided when viewed from the front than when the introduction notch is not provided. When the ground wire is introduced from the notch, the retaining protrusion is easily bited into the ground wire. Further, when the ground wire is introduced between the washer and the ground terminal plate, the degree of freedom of the position where the ground wire is introduced is improved, so that the work of connecting the ground wire to the ground terminal is facilitated.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Regarding the notation of directions, the vertical and horizontal directions are based on FIG. 3A, and the horizontal direction in FIG. 2 is referred to as the front-rear direction, the lower right-upper left direction in FIG. 2 is referred to as the left-right direction, and the lower left-upper right direction in FIG. 2 is referred to as the up-down direction.

  In this embodiment, as shown in FIG. 2, a body 1a in which a storage recess 11 in which a charging unit is stored is provided on the front surface, and two sets of three plug blade insertion openings 10 are arranged vertically on the front surface. And a cover 1b that is coupled to the front side of the body 1a and covers the housing recess 11 is provided. Further, a ground terminal hole 12b is formed in the lower end portion of the cover 1b in the front-rear direction so that the rear opening is closed by the body 1a to form the terminal housing recess 12. Furthermore, a ground terminal 2 is provided which is housed in the terminal housing recess 12 and connected to the ground wire EC (see FIGS. 1A and 1B). In addition, a door body 3 that opens and closes the terminal housing recess 12 is attached to the housing 1.

  The body 1a and the cover 1b are each made of, for example, a synthetic resin molded product, and are joined by an assembly frame 4 that also serves as an attachment frame for attachment to a construction surface (not shown). The assembly frame 4 is formed in a size and shape in accordance with the mounting frame defined in JIS C 8375, and has an exposed hole 41 formed in a three-module size. On the left and right sides of the exposure hole 41, there are two coupling pieces 42 that are formed in a U shape by penetrating engagement holes 42a on the left and right, respectively, and projecting backward two by two. In addition, a contact protrusion 43 projects rearward from the front end of the inner periphery of the engagement hole 42a. Two coupling protrusions 13a and 13b are provided on the left and right side surfaces of the body 1a and the cover 1b, respectively, so as to protrude vertically, and a recess 13c is provided on the front surface of the coupling protrusion 13b of the cover 1b. The coupling protrusions 13a and 13b are inserted into the engagement holes 42a of the assembly frame 4, the contact protrusion 43 of the assembly frame 4 is inserted into the recess 13c of the coupling protrusion 13b of the cover 1b, and the coupling protrusion 13a of the body 1a. The rear surface is locked to the coupling piece 42 of the assembly frame 4, so that the body 1 a and the cover 1 b are coupled so that the front surface of the cover 1 b is exposed from the exposure hole 41.

  Each plug blade insertion port 10 has a shape corresponding to a plug (not shown) with a grounding electrode for a rating of 125 V and 15 A defined in JIS C 8303, and as shown in FIG. A voltage-side plug blade insertion port 10a that is long in the vertical direction where the plug blade is inserted, and a plug blade of the ground side electrode that is provided on the left side of the voltage-side plug blade insertion port 10a and that is longer in the vertical direction than the voltage-side plug blade insertion port 10a. The grounding plug blade that is provided below the position sandwiched between the ground side plug blade insertion port 10b, the voltage side plug blade insertion port 10a, and the ground side plug blade insertion port 10b is inserted. It consists of an insertion port 10c.

  The storage recess 11 is provided with a partition projection 11d that partitions the storage recess 11 into three storage chambers 11a to 11c arranged side by side. The right side storage chamber 11a stores a voltage side conductive block 5a serving as a charging unit for the voltage side electrode, and the left side storage chamber 11b stores a ground side conductive block 5b serving as a charging unit for the ground side electrode. The storage chamber 11c stores a ground conductive block 5c serving as a charging unit for the ground electrode. Each of the conductive blocks 5a to 5c is formed by punching and bending a metal plate.

  Two voltage-side conductive blocks 5a and two ground-side conductive blocks 5b are provided side by side, each provided with a rearward U-shaped terminal portion 51, and provided on both upper and lower sides of the terminal portion 51, and inserted through the plug blade insertion ports 10a and 10b, respectively. And two blade receiving portions 52 for elastically holding the stopper blade from both sides in the thickness direction (left-right direction).

Further, as shown in FIG. 4, two ground conductive blocks 5c are arranged side by side, and are grounded blade holders that elastically sandwich the ground electrode plug blades inserted from the ground plug blade insertion port 10c from both the left and right sides. Portion 53, blade receiving connection portion 54 for connecting between ground contact blade receiving portions 53, terminal connecting portion 55 projecting forward from the lower end of blade receiving connecting portion 54, and both left and right ends of terminal connecting portion 55. and a two terminal portions 51 of the Re set vignetting rearward U-shape. The connecting portion 54 has a bottom portion 54a that is long in the vertical direction with the thickness direction in the front-rear direction, a reinforcing rib 54b that protrudes forward from both left and right ends of the bottom portion 54a, and a protruding portion that protrudes forward from the vicinity of the upper end of the reinforcing rib 54b. And a floating stopper 54c that contacts the rear surface of the cover 1b. The ground conductive block 5c of this embodiment has improved mechanical strength due to the reinforcing ribs 54b. Further, by providing the floating preventing portion 54c, even when the ground blade receiving portion 53 is pulled forward when the plug blade is pulled out, the ground conductive block 5c is not displaced forward with respect to the housing 1. .

  Moreover, the terminal part 51 of each conductive block 5a-5c is a site | part to which the electric wire (not shown) introduce | transduced from the electric wire insertion hole (not shown) penetrated in the front and back by the body 1a carries out contact conduction, A locking spring 61 which is arranged inside the terminal portion 51 and locks the electric wire between the inner surface of the terminal portion 51 and a release button 62 for releasing the locking of the locking spring 61 together with a quick-connect terminal. Constitute. More specifically, the release button 62 has an operation display part 62a located outside the housing 1, and two leg parts 62b that protrude inward from the operation display part 62a. On the left and right sides of the housing recess 11 of the body 1a, there are cut holes that communicate with the inside and outside of the housing recess 11 and that are open to the front of the body 1a and communicate with the inside and outside of the housing recess 11 with the rear surface of the cover 1b. A notch 11e is provided, and the release button 62 is supported so as to be displaceable back and forth with respect to the housing 1 by inserting each leg portion 62b into the notch 11e. The left and right side surfaces of the body 1a are curved surfaces that bulge the center part in the front-rear direction outward, and the release button 62 is moved by the operation display part 62a sliding on the curved surface when displaced in the front-rear direction. Rotate slightly so as to increase the projecting dimension of the leg portion 62b into the housing recess 11 with the forward displacement.

  Further, each leg portion 62 b of the release button 62 faces the lock spring 61 in the storage recess 11. When the operation display portion 62a is operated so as to be displaced forward when the electric wire is locked to the lock spring 61, the lock springs 61 are respectively provided on the different sides of the electric wire between the leg portions 62b. The lock is released by pressing and elastically deforming.

Further, the release button 62 is urged rearward (that is, opposite to the direction operated when unlocking) with respect to the housing 1 by a display spring 63 made of a leaf spring housed in the housing recess 11. In the terminal portion 51, an electric wire insertion hole 51a is provided in the front and rear direction of the electric wire insertion hole of the body 1a, and a locking projection 51b is protruded forward on the outer side in the left-right direction with respect to the electric wire insertion hole 51a. Yes. Here, the release button 62 has a locked portion 62c that is positioned in front of the position sandwiched between the leg portions 62b in the housing 1 and is detachably locked to the locking projection 51b.

  The release button 62 is positioned at the front end of the movable range in a state where the electric wire is not locked to the lock spring 61, and the locked portion 62c is locked to the lock protrusion 51b to Moving to is prohibited. In this state, when the electric wire inserted from the electric wire insertion hole passes through the electric wire insertion hole 51a and presses the locked portion 62c forward, and the locking of the locking protrusion 51b to the locked portion 62 is released. The release button 62 is displaced rearward at once by the spring force of the display spring 63. By seeing this, the user can clearly know the completion of the connection of the electric wire.

  Further, the door body 3 is made of, for example, a synthetic resin molded product, and as shown in FIG. 5, a cover portion 31 that covers the terminal housing recess 12, and two coupling portions 32 that are provided side by side and are respectively coupled to the housing 1, A connecting portion 33 that is interposed between each coupling portion 32 and the cover portion 31, is formed thinner than other portions, and supports the cover portion 31 so as to be rotatable with respect to the coupling portion 32 when viewed from the left-right direction. With. Engagement claws 32 a project from the front portions of the coupling portions 32 in the left-right direction and in the direction approaching the other coupling portion 32. In the cover 1b, two coupling holes 14 are arranged side by side on the upper side of the grounding terminal hole 12b in the left and right direction, and the door 3 has the coupling portion 32 inserted into the coupling hole 14 so that each engaging claw 32a is inserted. As shown in FIG. 6, the door body 3 is coupled to the housing 1 by engaging with the rear surface of the cover 1 b. In addition, two insertion cutouts 31a are provided at the lower end of the cover portion 31. The insertion cutouts 31a form a hole between the lower end of the terminal storage recess 12 and through which the ground wire EC connected to the ground terminal 2 is inserted. It has been.

  Further, at both left and right end portions of the cover portion 31, locking projections 34 project from the rear in a state in which the door body 3 is closed, and each locking projection 34 is engaged with the locking portion 31. A hooked claw 34 a is projected from the direction intersecting the protruding direction of the locking projection 34 and approaching the connecting portion 33, that is, upward in the state where the door 3 is closed. In a state in which the door body 3 is closed, as shown in FIG. 7 (a), the latching claw 34a is detachably locked to the rear surface of the cover 1b, thereby covering the door body 3 in the opening direction. The rotation of 31 is prohibited. Engagement / disengagement of the latching claw 34a is performed by applying a force to the cover portion 31 to elastically deform the latching convex portion 34.

  Here, when the door body 3 is closed, the latching claw 34a is located on the rear side of the connecting portion 33 that becomes the rotation axis of the cover portion 31, and therefore, as shown by an arrow A1 in FIG. When the cover part 31 rotates in the direction in which the door body 3 is opened, the hooked claw 34a moves slightly downward (leftward in FIG. 7A) at the beginning of opening the door body 3. That is, at the beginning of the opening of the door body 3, the movement direction of the latching claw 34 a and the unlocking direction A2 of the latching claw 34 a are the same, and as shown in FIG. Compared with the case where the protruding direction of the pawl 34a is reversed, the stress applied to the locked projection 34 and the locked claw 34a when releasing the locking is reduced. The to-be-latched claw 34a is not easily damaged.

  Hereinafter, the ground terminal 2 which is the gist of the present invention will be described. As shown in FIG. 8, the ground terminal 2 includes a ground terminal plate 21 with screw holes 21 a extending therethrough, a terminal screw 22 screwed into the screw hole 21 a of the ground terminal plate 21, and a ground terminal plate 21. A screw insertion hole 23a through which the screwed portion 22a of the terminal screw 22 screwed into the screw hole 21a is inserted is inserted in the front and rear, and is sandwiched between the head portion 22b of the terminal screw 22 and the grounding terminal plate 21. And a washer 23 sandwiched between the terminal plate 21 and the ground terminal plate 21. The ground terminal plate 21 and the washer 23 are each formed by punching and bending a metal plate, for example.

  The ground terminal plate 21 includes a rectangular main body portion 21b that is elongated to the left and right, through which screw holes 21a are provided, and leg portions 21c, 21d, which protrude from the outer periphery of the main body portion 21b to the rear (downward in FIG. 8). 21e. In the main body portion 21b, a portion where the screw hole 21a is provided is subjected to burring, and the periphery of the screw hole 21a projects rearward in an annular shape (see FIGS. 1A and 1B). Further, in the upper (front side in FIG. 8) leg portion 21c, a notch 21f is provided at the center of the rear end, and mounting portions 21g project from the left and right sides of the notch 21f. Yes. Each mounting portion 21g has a caulking hole 21h extending in the front-rear direction, and each terminal portion 51 of the ground conductive block 5c has a caulking projection 51c protruding from the front surface (the upper surface in FIG. 8). The ground terminal plate 21 is mechanically and electrically connected to the ground conductive block 5c by inserting the projection 51c into the caulking hole 21h and caulking.

  As shown in FIG. 9, the washer 23 has a shape in which a rectangular introduction notch 23 b is provided at each of a rectangular lower right end and a left lower end that are long in the left and right directions when viewed from the front. Further, on the upper side of the introduction notch 23b, the four corners of the washer 23 are bent rearward, so that retaining projections 23c and 23d having larger rearward projecting dimensions are provided at positions closer to the left and right ends, respectively. . The upper retaining protrusion 23c is located at the depth direction of the introduction notch 23b as viewed from the front of the washer 23, that is, at the upper end.

  When the ground wire EC is connected to the ground terminal 2, that is, when the ground wire EC is sandwiched between the washer 23 and the ground terminal plate 21 as shown in FIGS. Since each of 23d bites into the ground line EC, the ground line EC is prevented from falling off. In addition, since the rearward projecting dimensions of the retaining protrusions 23c and 23d are larger at positions closer to the left and right ends, the ground line EC is less likely to drop off to the left and right.

  Here, the left and right ends of the ground terminal plate 21 are provided with notches 21i that make the left and right dimensions of the front end portion of the upper leg portion 21c smaller than the left and right dimensions of the main body portion 21b. Due to the notches 21i, corners are formed between the upper end surface and the front surface at the left and right end portions of the main body 21b, and the ground lines EC are more difficult to drop off when the corners bite into the ground lines EC. ing. That is, the corners formed between the upper end surface and the front surface at the left and right end portions of the main body portion 21b of the ground terminal plate 21 are the retaining portions in the claims.

  Further, the terminal screw 22 is a screw with a washer that is attached to the washer 23 so that it cannot be attached and detached. That is, as shown in FIG. 10, the terminal screw 22 is inserted between the screwed portion 22a having a thread and the head portion 22b into the screw insertion hole 23a of the washer 23 having an outer diameter smaller than that of the screwed portion 22a. The small diameter portion 22c is provided. Further, the inner diameter of the screw insertion hole 23a of the washer 23 is smaller than the outer diameter of the screwing portion 22a of the terminal screw 22, and the washer 23 is prevented from falling off by the screwing portion 22a. Further, the length dimension in the axial direction (front-rear direction) of the small diameter portion 22 c is substantially the same as the thickness dimension of the washer 23. Thereby, even when the grounding wire EC is sandwiched between the washer 23 and the grounding terminal plate 21 only on the left and right sides of the terminal screw 22, the inclination and rattling of the washer 23 with respect to the grounding terminal plate 21 can be suppressed. A contact area between the washer 23 and the ground terminal plate 21 and the ground wire EC is secured.

  Further, in the cover 1b, the front surfaces of the respective parts on the lower side of the introduction notch 23b of the washer 23 are guide surfaces 12c inclined upward and backward, respectively. In other words, the ground line EC can be easily introduced between the washer 23 and the ground terminal plate 21 by inserting the ground line EC along the guide surface 12 c.

  Further, as shown in FIG. 3 (c), on the rear surface of the cover 1b, a ground wire recess 15 that is open downward and rearward is provided in each of the upper portions of the introduction notch 23b. Then, by inserting the tip of the ground wire EC into the ground wire recess 15, the retaining protrusion 23c is bitten into the ground wire EC at a position further away from the tip of the ground wire EC, thereby improving the holding strength. Is possible.

  Further, as shown in FIG. 11, the inner surface of the left and right sides of the ground wire recess 15 near the other ground wire recess 15 has an opening of the ground wire recess 15 downward in the vicinity of the lower opening. The inclined surface 15a is inclined in the spreading direction, and the ground line EC is guided by the inclined surface 15a as indicated by the arrow A3 in FIG. It has become easier.

  According to the above configuration, since the introduction notch 23b is provided in the washer 23, the distance between the lower end of the washer 23 and the upper retaining protrusion 23c is shortened. By introducing the ground line EC on the lower side, the ground line EC can be easily bited into the retaining protrusion 23c. Further, since the position where the ground line EC is introduced to the lower side of the washer 23 can be made higher by the introduction notch 23b, the upper and lower width dimensions of the guide surface 12c are increased to make the inclination gentler. As a result, the bending of the ground wire EC when introduced under the washer 23 can be reduced, the force required for insertion can be reduced, and the connection of the ground wire EC to the ground terminal 2 can be facilitated.

  By the way, as shown in FIG. 12, the ground terminal 2 of this embodiment can be connected to a Y-type crimp terminal YT made of a metal plate and having a notch YT1. In order to connect such a Y-shaped crimp terminal YT to the ground terminal 2, the Y-shaped crimp terminal YT is introduced between the washer 23 and the ground terminal plate 21, and the notch YT1 of the Y-shaped crimp terminal YT is connected to the terminal. The terminal screw 22 may be tightened after being introduced into the screwing portion 22a of the screw 22. And under the terminal screw 22, the front surface of the cover 1b is provided with an introduction recess 16 that is open up and down and communicates with the terminal storage recess 12. The left and right dimensions of the introduction concave portion 16 are larger than the left and right dimensions of the Y-shaped crimp terminal YT. By introducing the Y-shaped crimp terminal YT through the introduction concave portion 16, the Y-shaped crimp terminal YT is connected to the ground terminal 2. It can be easily connected to.

  The dimension in the axial direction (front-rear direction) of the small diameter portion 22c may be larger than the sum of the thickness dimension of the washer 23 and the thickness dimension of the Y-shaped crimp terminal YT. If this configuration is adopted, the Y-shaped crimp terminal YT can be sandwiched between the washer 23 and the head portion 22b of the terminal screw 22 as shown in FIG. The Y-type crimp terminal YT can be further easily connected as compared with the case where it is necessary to introduce it to the side.

  Further, instead of providing a retaining protrusion 23d by bending backward on the lower side of the introduction notch 23b of the washer 23, it is cut forward (upward in FIG. 15) as shown in FIGS. 14 (a) and 15. You may provide the introducing | transducing part 23e in which the rear surface inclined by raising to the upper direction (right side of FIG. 15) which is the depth direction of the introduction notch 23b. If this configuration is adopted, the ground wire EC is guided between the washer 23 and the ground terminal plate 21 by the rear surface of the introduction portion 23e, and therefore the connection of the ground wire EC to the ground terminal 2 becomes easier. Further, in the examples of FIGS. 14A, 14B, and 15, the shape of the washer 23 is changed so that the range in which the rear surface of the retaining projection 23c is inclined rearward upward is further elongated vertically. The retaining projection 23 is provided with a function as a guiding portion for guiding the ground wire EC so as to be obliquely rearward with respect to the front surface of the housing 1. Further, as shown in FIG. 14 (b), the ground terminal plate 21 has inclined portions 21j whose front surface is opposed to the rear surface of the retaining projection 23c and is inclined rearward upward from both left and right end portions of the main body portion 21b. Each projectes backward. The grounding terminal EC 21 is guided by the rear surface of the retaining protrusion 23 c and obliquely rearward with respect to the front surface of the housing 1, so that the grounding terminal plate 21 is parallel to the grounding wire EC parallel to the front surface of the housing 1. Since more grounding wires EC are sandwiched between the wire and the washer 23, the holding force of the grounding terminal 2 with respect to the grounding wire EC can be improved. In addition, since the ground terminal plate 21 is provided with the inclined portion 21j, the contact area between the ground terminal plate 21 and the ground line EC is increased, so that the connection reliability is improved.

  Incidentally, as a method of increasing the contact area between the ground wire EC and the ground terminal plate 21 without greatly changing the shape of the ground terminal plate 21, an introduction groove 17 into which the ground wire EC is introduced as shown in FIG. There is also a method in which the ground wire EC can be connected to the ground terminal 2 from the left and right direction as shown by an arrow A4, provided on the front surface of the housing 1 on the left and right sides of the terminal housing recess 12.

It is a figure which shows the principal part in the state by which the ground wire was connected to the ground terminal in embodiment of this invention, (a) is a partially broken right view, (b) is a top view which abbreviate | omitted the housing. It is a disassembled perspective view which shows the same as the above. It is a figure which shows a cover same as the above, (a) is a front view, (b) is AA sectional drawing of (a), (c) is a rear view. It is a figure which shows the grounding conductive block same as the above, (a) is a front view, (b) is a right view, (c) is BB sectional drawing of (a), (d) is a perspective view. It is a figure which shows a door body same as the above, (a) is a top view which shows the expanded state, (b) is a right view which shows the expanded state, (c) shows a shape when a terminal accommodating recessed part is closed. It is a right view. It is sectional drawing which shows the principal part of the state which mounted | wore the housing with the door body. (A) is sectional drawing which shows the principal part same as the above, (b) is sectional drawing which shows the principal part of a comparative example. It is a disassembled perspective view which shows a ground terminal and a ground conductive block same as the above. It is a front view which shows the principal part same as the above. It is a top view which shows a terminal screw same as the above. It is the partially broken front view which shows the principal part same as the above. It is a perspective view which shows the Y-type crimp terminal connected to the ground terminal same as the above. It is the partially broken right view which shows the principal part same as the above. (A) (b) is a perspective view which shows the principal part of another form same as the above, (a) shows a washer, (b) shows the principal part of a ground terminal board. It is a right view which shows the principal part of the form of FIG. It is a front view which shows an example of the method of improving connection reliability. It is sectional drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Ground terminal 3 Door 5a Voltage side conductive block 5b Ground side conductive block 5c Ground conductive block 12 Terminal storage recess 15 Ground wire recess 16 Introduction recess 21 Ground terminal plate 21a Screw hole 21j Inclined portion 22 Terminal screw 22a Screwed Portion 22b head portion 22c small diameter portion 23 washer 23a screw insertion hole 23b introduction notch 23c retaining projection 23e introduction portion

Claims (5)

A housing in which at least one set of blade insertion holes is provided on the front surface and attached to the construction surface, and a plurality of blade blades that are housed in the housing and are electrically connected to a power source and are electrically connected to the blade inserted from the blade insertion port. Each blade receiver, and a ground terminal that is housed in a terminal housing recess provided at the front end of the housing and to which a ground wire is connected,
The grounding terminal is inserted into the grounding terminal plate that is fixed to the housing and has a screw hole that opens to the front, a terminal screw that is screwed into the screw hole of the grounding terminal plate with the head facing forward, and the terminal screw. It has a screw insertion hole and is sandwiched between the head of the terminal screw and the grounding terminal plate, so that it is attached to the front side of the grounding terminal plate with the thickness direction facing forward and backward. A washer for clamping,
An introduction notch that is open in the front-rear direction is provided on the outer periphery of the washer, and the end of the washer in the depth direction of the introduction notch as viewed from the front bites into the ground wire to prevent the ground wire from falling off. The stop projection protrudes backward ,
An outlet characterized in that a ground wire recess is provided on the inner surface of the terminal storage recess to store the tip of the ground wire that is prevented from falling off by a retaining protrusion . 2. The outlet according to claim 1 , wherein at least a part of the inner surface near the opening of the ground wire recess is inclined in a direction of increasing the inner diameter of the ground wire recess as the position is closer to the retaining protrusion . A housing in which at least one set of blade insertion holes is provided on the front surface and attached to the construction surface, and a plurality of blade blades that are housed in the housing and are electrically connected to a power source and are electrically connected to the blade inserted from the blade insertion port. Each blade receiver, and a ground terminal that is housed in a terminal housing recess provided at the front end of the housing and to which a ground wire is connected,
The grounding terminal is inserted into the grounding terminal plate that is fixed to the housing and has a screw hole that opens to the front, a terminal screw that is screwed into the screw hole of the grounding terminal plate with the head facing forward, and the terminal screw. It has a screw insertion hole and is sandwiched between the head of the terminal screw and the grounding terminal plate, so that it is attached to the front side of the grounding terminal plate with the thickness direction facing forward and backward. A washer for clamping,
An introduction notch that is open in the front-rear direction is provided on the outer periphery of the washer, and the end of the washer in the depth direction of the introduction notch as viewed from the front bites into the ground wire to prevent the ground wire from falling off. The stop projection protrudes backward,
An outlet characterized in that the end of the ground terminal plate is provided with a retaining portion that cuts into the ground wire and prevents the ground wire from falling off . A housing in which at least one set of blade insertion holes is provided on the front surface and attached to the construction surface, and a plurality of blade blades that are housed in the housing and are electrically connected to a power source and are electrically connected to the blade inserted from the blade insertion port. Each blade receiver, and a ground terminal that is housed in a terminal housing recess provided at the front end of the housing and to which a ground wire is connected,
The grounding terminal is inserted into the grounding terminal plate that is fixed to the housing and has a screw hole that opens to the front, a terminal screw that is screwed into the screw hole of the grounding terminal plate with the head facing forward, and the terminal screw. It has a screw insertion hole and is sandwiched between the head of the terminal screw and the grounding terminal plate, so that it is attached to the front side of the grounding terminal plate with the thickness direction facing forward and backward. A washer for clamping,
An introduction notch opened in the front-rear direction is provided on the outer periphery of the washer, and the end of the washer in the depth direction of the introduction notch as viewed from the front bites into the ground wire to prevent the ground wire from falling off. The stop projection protrudes backward,
The washer is characterized in that it has an introduction part in the vicinity of the introduction notch whose rear surface is inclined forward in the depth direction of the introduction notch as viewed from the front . A housing in which at least one set of blade insertion holes is provided on the front surface and attached to the construction surface, and a plurality of blade blades that are housed in the housing and are electrically connected to a power source and are electrically connected to the blade inserted from the blade insertion port. Each blade receiver, and a ground terminal that is housed in a terminal housing recess provided at the front end of the housing and to which a ground wire is connected,
The grounding terminal is inserted into the grounding terminal plate that is fixed to the housing and has a screw hole that opens to the front, a terminal screw that is screwed into the screw hole of the grounding terminal plate with the head facing forward, and the terminal screw. It has a screw insertion hole and is sandwiched between the head of the terminal screw and the grounding terminal plate, so that it is attached to the front side of the grounding terminal plate with the thickness direction facing forward and backward. A washer for clamping,
An introduction notch opened in the front-rear direction is provided on the outer periphery of the washer, and the end of the washer in the depth direction of the introduction notch as viewed from the front bites into the ground wire to prevent the ground wire from falling off. The stop projection protrudes backward,
The end of the ground terminal plate in the depth direction of the introduction notch as viewed from the front is provided with an inclined portion whose front surface is inclined backward toward the end of the ground terminal plate, and the washer is provided on the inclined portion of the ground terminal plate. An outlet characterized in that a guiding portion is provided which is opposed and has a rear surface inclined along the inclined portion of the ground terminal plate .

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