JP4046102B2 - Terminal equipment - Google Patents

Description

  The present invention relates to a terminal device.

  2. Description of the Related Art Conventionally, in wiring devices such as switches and outlets, quick connection terminal devices have been widely used for connecting electric wires introduced into a container through electric wire insertion holes provided in the container. As this type of quick-connect terminal device, as shown in FIG. 17 (a), a terminal plate 202 that comes into contact with an electric wire 210 that is housed in the vessel body 200 and is introduced into the vessel body 200 through the electric wire insertion hole 201; What is provided with the lock spring 203 which clamps an electric wire between 202 is known. The locking spring 203 is a leaf spring, and is formed so as to hold the electric wire 210 by sandwiching the electric wire 210 between the contact piece 203a and the locking piece 203b provided on the locking spring 203 and the terminal plate 202. ing. In other words, when the electric wire 210 is introduced into the main body 200 through the electric wire insertion hole 201 provided in the main body 200, the electric wire 210 bends in a direction to separate the contact piece 203a and the locking piece 203b from the terminal plate 202, and the contact piece 203a and the chain The electric wire 210 is configured to be sandwiched between the terminal plate 202 and the locking piece 203b by the spring force generated in the locking piece 203b. Here, in a state where the electric wire 210 is sandwiched between the terminal plate 202 and the contact piece 203a and the locking piece 203b, the edges of the contact piece 203a and the locking piece 203b elastically contact the electric wire 210, and When the locking piece 203b bites into the part, the electric wire 210 is prevented from coming off. Thus, since the electric wire 210 is held in a state where it is in contact with the terminal plate 202 just by inserting the electric wire 210 into the electric wire insertion hole 201, the connection of the electric wire 210 is compared with a structure in which the electric wire 210 is connected using a terminal screw. Work becomes easy.

  By the way, in such a conventional quick-connecting terminal device, the locking spring 203 originally has a function of pressing the electric wire 210 against the terminal plate 202 and at the same time preventing it from coming off. There was almost no responsibility for the current path. Therefore, as shown in FIG. 17B, in a normal state where the electric wire 210 is straightly introduced through the electric wire insertion hole 201, the contact area between the electric wire 210 and the terminal plate 202 is sufficient, and a stable connection state can be obtained. As shown in FIG. 5C, when the contact area with the terminal plate 202 becomes small due to bending or bending of the electric wire 210, the connection between the electric wire 210 and the terminal plate 202 becomes point contact, and the contact state becomes unstable. There was a risk of becoming.

  Therefore, in order to make the locking spring 203 also carry an energization path, a quick connection terminal device has been proposed in which the terminal plate 202 and the locking spring 203 are integrally formed by bending a band-shaped metal plate. This quick connection terminal device includes a terminal plate 100 having a shape as shown in FIG. This terminal plate 100 is formed by bending both ends of a belt-like metal plate having spring properties in one direction, and has a substantially convex main piece 101 that connects both ends and a wide end of the main piece 101. A J-shaped locking piece 102 that hangs downward from both sides in the figure, and a contact piece 103 that hangs downward from both sides of the other narrow end of the main piece 101, respectively. On both sides of the narrow portion of the piece 101, a notch 101a is provided for allowing the tip of the electric wire inserted between the locking piece 102 and the contact piece 103 to pass upward, and the other end facing the notch 101a is provided. The part is provided with a locking piece 104 that bites into another part of the electric wire and prevents it from coming off.

Here, an electric wire is inserted into the inside of the vessel body through the wire insertion hole of the vessel body, the electric wire is passed through the gap between the locking piece 102 and the contact piece 103, and further, the tip of the electric wire passes upward from the notch 101a. Then, since the electric wire is pressed toward the contact piece 103 and the lock piece 104 by the lock piece 102, the lock pieces 102 and 104 respectively bite into a part of the electric wire to prevent the contact piece 103 and the contact piece 103. As a result of the contact with the electric wire, the electric wire comes into contact with the terminal plate 100 at a plurality of sites, and there is an advantage that the reliability of the electrical connection is improved.
JP 2004-63212 A

  By the way, there is a possibility that electric wires of various wire diameters are connected to the above-described quick connection terminal device, and therefore the diameter of the electric wire insertion hole is formed in accordance with the thickest electric wire. Therefore, when the thinnest electric wire is inserted into the electric wire insertion hole, since the gap between the electric wire and the electric wire insertion hole is wide, the electric wire is inclined and inserted, as shown in FIG. There was a possibility that it would hit the main piece 101 connecting the parts. And when the front-end | tip of the electric wire 105 collides with the main piece 101, since the lock piece 104 cannot contact the electric wire 105 and a contact area with the electric wire 105 becomes small, a regular connection state cannot be obtained and the connection state of the electric wire 105 There was a problem that became unstable.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a terminal device in which the inclination of the electric wire is regulated to improve the reliability of electrical connection.

In order to achieve the above object, the invention of claim 1 is directed to a terminal plate that contacts a wire inserted into a container body through a wire insertion hole provided in the container body, and a terminal plate. made by the storage and release means for releasing the wire connecting state, the terminal plate is formed by bending both end portions of the strip-shaped metal plate having a spring property in one direction, at one end, J-shaped The first locking part that is bent to the other end side and presses the electric wire toward the other end side and bites into a part of the electric wire to prevent it from coming out is wider at the other end than the first locking part. Each of the contact portions that are formed narrowly and in contact with the electric wire is provided, and a notch portion that passes the tip of the electric wire inserted between the first locking portion and the contact portion is provided at the connecting portion that connects both end portions, and the other At the end of the wire, cut into the other part of the wire at the part facing the notch to prevent it from coming off The two-chain lock portion is provided, and the release means is an operation portion that is exposed to the surface of the vessel and is manually operated, a shaft portion that is pivotally supported inside the vessel and allows the operation portion to rotate, and a terminal It is arranged in a space surrounded by both ends of the plate and the connecting portion, and when the operation portion rotates around the shaft portion in response to manual operation, the pressed portion of the first locking portion that does not face the contact portion is springed. A pressing portion that presses away from the contact portion against a force, and protrudes toward the clearance side at a portion of the release means that faces the clearance between the first locking portion and the other end, and the tip of the electric wire It is characterized in that there is provided a restricting projection for restricting that the lens is detached from the notch and tilted toward the connecting portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first projection is such that the amount of protrusion toward the gap side increases toward the rear side in the electric wire insertion direction at the front side of the electric wire insertion direction in the restriction projection. An inclined surface is provided.

  According to a third aspect of the present invention, in the first or second aspect of the invention, by cutting up the tip side of the portion of the first locking portion that is not opposed to the other end portion, the wire protrudes to the other end portion side. Protrusions that restrict the inclination of the projection are provided.

  According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the direction of approaching one end side closer to the rear side in the wire insertion direction at the connecting portion with the connecting portion at the other end portion. A second inclined surface that is inclined to each other is provided.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, a chamfer is provided at a corner of the joint portion that faces the gap.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, the wire insertion hole is tapered toward the inner side and is eccentric toward the gap.

  According to a seventh aspect of the present invention, in any one of the first to sixth aspects of the present invention, a wall projecting outward is provided at a site around the wire insertion hole on the surface of the vessel.

  According to the invention of claim 8, in any one of the inventions of claims 1 to 7, the operating portion is pivotally supported so as to be movable between a release position for releasing the electric wire connection state and a non-release position, Temporary holding means for temporarily holding the operation unit at the non-release position is provided.

  According to the first aspect of the present invention, since the restriction projection that protrudes toward the gap is provided at the part of the release means that faces the gap between the first locking part and the other end, the wire insertion hole of the container body When the electric wire is inserted into the inside of the container body and the electric wire is inserted into the gap between the first locking part and the contact part, the tip of the electric wire hits the regulation protrusion, and the tip is detached from the notch and connected. The first locking part and the second locking part respectively bite into a part of the electric wire to prevent it from coming off, and the contact part comes into contact with the electric wire. Thus, the normal connection state can be obtained, and the reliability of electrical connection is improved.

  According to the invention of claim 2, since the tip of the electric wire is guided from the connecting portion side to the notch portion side when the electric wire is inserted, the tip of the electric wire hits the first inclined surface. As a connection state, the reliability of electrical connection can be improved.

  According to the invention of claim 3, when the electric wire is inserted, the tip of the electric wire comes into contact with the protruding portion, so that the tip of the electric wire can be prevented from being inclined and inserted near the connecting portion, and the normal connection state As a result, the reliability of electrical connection can be improved.

  According to the invention of claim 4, even if the electric wire is inserted inclined toward the connecting portion and the tip of the electric wire hits the connecting portion, the second inclined surface is formed at the connecting portion with the connecting portion at the other end. Since it forms, compared with the case where the angle of a connection part is steep, the front-end | tip of an electric wire hits a connection part, it becomes difficult to stop, and it can make it easy to guide an electric wire to a regular insertion position.

  According to the invention of claim 5, even if the electric wire is inserted inclined toward the connecting portion and the tip of the electric wire hits the connecting portion, a chamfer is formed at the corner of the connecting portion. It is possible to easily guide the electric wire to the normal insertion position by moving to the notch portion side along the line.

  According to the invention of claim 6, since the wire insertion hole is tapered toward the inner side and eccentric toward the gap, the wire is guided closer to the gap as it advances through the wire insertion hole, and is guided to the normal connection position. can do.

  According to invention of Claim 7, it can prevent that an electric wire inclines and is inserted when an electric wire hits the wall around an electric wire penetration hole.

  According to the invention of claim 8, since the operation part is temporarily held at the non-released position by the temporary holding means, there is no possibility that the position of the operation part will be unstable at the time of non-operation, and an electric wire or the like is caught on the operation part at the time of construction. The connection state of the electric wire can be prevented from being released.

  Hereinafter, an embodiment in which a terminal device according to the present invention is applied to a terminal portion of an outlet will be described with reference to the drawings. However, the wiring device is not limited to an outlet, and it goes without saying that the technical idea of the present invention can be applied to a wiring device other than an outlet such as a switch. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the direction shown in FIG. 2A, and the front in FIG. Therefore, the right end in FIG.

  As shown in FIGS. 1 to 4, the receptacle body 1 includes a body 2 formed in a substantially box shape whose front surface is opened using a thermosetting synthetic resin (for example, urea resin) having excellent tracking resistance. By using a thermosetting synthetic resin (for example, urea resin) that is also excellent in tracking resistance and joining the cover 3 formed in a substantially box shape whose rear surface is opened by using an assembly frame 4 described later. In the container 1, the conductive members 40 a and 40 b for the voltage electrode, the conductive member 40 c for the ground electrode, and the three release levers 50 are mounted.

A projecting boss 3a projects from the front wall of the cover 3, and a shoulder 3b projects from the center of both side surfaces along the longitudinal direction. Further, on the front surface of the boss portion 3a, there are outlet ports (so-called universal type outlet ports) 5 including a pair of contact insertion ports 6 and 6 into which contacts such as plug blades and conductive pins are inserted, and a ground electrode for each. A plug outlet (three-pole outlet opening) 7 composed of three contact (plug blade) insertion openings 8a and 8b into which a flat plug blade including the same is inserted is provided in the longitudinal direction.

Each contact insertion port 6, 6 of the universal outlet 5 has a shape corresponding to various contacts such as a flat plug blade or a cylindrical conductive pin, that is, a rectangular hole 6 a into which the plug blade is inserted. And the semicircular hole 6b into which the conductive pin is inserted are integrally formed to communicate with each other. Each contact insertion port 8a, 8b of the three-pole outlet port 7 is formed in a rectangular shape corresponding to the flat plug blade, and remains on both sides of the contact insertion port 8a into which the ground electrode plug blade is inserted (voltage). Pole) contact insertion holes 8b, 8b are arranged in an inverted C shape.

  On the other hand, in the approximate center of the body 2, as shown in FIG. 1 and FIG. 5, a housing recess 12 is formed that is surrounded by a peripheral wall 11 standing from the bottom and that houses the conductive member 40c for the ground electrode. Has been. A through-hole 2 f is inserted through the bottom of the storage recess 12 so as to pass through an operation portion 54 of a release lever 50 described later. A rib 11a is provided on both sides of the through hole 2f from the bottom of the storage recess 12, and the rib 11a allows the inside of the storage recess 12 to store a blade receiving portion 32 described later, and a blade receiving portion storage chamber 12a. It is partitioned off into a terminal portion storage chamber 12b for storing a terminal portion 20 ′ to be described later. On the outside of the storage recess 12, storage recesses 14 and 14 are formed which are partitioned into two left and right spaces by a partition wall 13 erected from the bottom to store the conductive members 40 a and 40 b for voltage electrodes, respectively. . Each storage recess 14 is further divided into three spaces by a partition wall 16 erected from the bottom, and blade receiving portion storage chambers 14a for storing blade receiving portions 30, 31 described later are provided on both sides in the longitudinal direction. A terminal portion storage chamber 14b for storing a terminal portion 20 to be described later is provided at an intermediate portion in the longitudinal direction. In addition, the terminal part storage chambers 14b, 14b on the voltage electrode side and the terminal part storage chamber 12b on the ground electrode side are provided side by side in the left-right direction (short width direction) of the body 2, and the terminal part storage chambers 12b, 14b, 14b. Two electric wire insertion holes 15 for introducing electric wires from the outside are opened at the bottom of each.

  Further, on both side walls along the longitudinal direction of the body 2, a bulging portion 2a is formed at a portion corresponding to the shoulder portion 3b of the cover 3, and the bulging portion 2a has a vertical groove communicating with the terminal portion storage chamber 14b. 17 is formed along the front-rear direction. Further, stepped portions 17a and 17a are formed on the upper and lower side edges of the vertical groove 17 on the surface of the bulging portion 2a, and a concave portion 17b recessed in an arc shape is formed on the rear side of the vertical groove 17. A protruding portion 3e that fits in the longitudinal groove 17 protrudes from the rear edge of each shoulder portion 3b of the cover 3.

  Next, the conductive member 40a or 40b and the release lever 50 housed in the housing recess 14 of the body 2 will be described below. The conductive members 40a and 40b are configured by integrally connecting the terminal plate 21 and the blade receiving portions 30 and 31, and the terminal portion 20 (terminal device) is configured by the terminal plate 21 and the release lever 50 as release means. Since the conductive members 40a and 40b are formed in plane symmetry and have a mirror image relationship with each other, the conductive member 40a will be described below with reference to FIGS. 1, 6, and 7, and the conductive member 40b. Description of is omitted. 6 and 7 show a state of only the terminal plate 21 before the blade receiving portions 30 and 31 are fixed by caulking.

  The blade receiving portion 30 is formed by processing a metal plate having a spring property, and is a plug projecting at a substantially right angle with respect to a pair of conductive pin blade receiving springs 30a and both blade receiving springs 30a arranged to face each other. It has a blade receiving spring 30b for blades and is fixed by caulking to a terminal plate 21 described later.

  The blade receiving portion 31 is formed by processing a metal plate having a spring property, has a pair of blade receiving springs 31a arranged to face each other, and is fixed by caulking to a terminal plate 21 described later.

  6 and 7, the terminal plate 21 is formed by bending both ends of a belt-like metal plate having a spring property in one direction, and further bending it in a ring shape so that the tips substantially intersect. , A substantially convex main piece 21a (connecting portion) that connects both ends, and a rear side from both sides of the narrow end portion (the other end portion) of the main piece 21a (downward in FIG. 6A, the same applies hereinafter). The contact pieces 22 and 22 that are respectively hung down and the J-shaped locking pieces 23 and 23 that are hung down from both sides of the wide end portion (one end portion) of the main piece 21a (first locking portion) ) And connecting pieces 25, 25 projecting sideways from the side edges of the locking pieces 23, 23 are integrally provided. The locking piece 23 is bent in a J-shape, and includes a locking portion 23a that presses the electric wire toward the other end (contact piece 22) side and bites into a part of the electric wire to prevent it from coming off. At the same time, a bent portion 23b that is convex in a direction away from the electric wire (contact piece 22) is provided at a position behind the lock portion 23a. The contact piece 22 is bent in a square shape when viewed from the side, and elastically contacts the electric wire with a flat surface formed at an intermediate portion in the electric wire insertion direction. Further, the main piece 21a is provided with a notch 21b through which the tip of an electric wire inserted between the locking piece 23 and the contact piece 22 passes forward (upward in FIG. 6A, the same applies hereinafter). Here, the width dimension of the contact piece 22 is formed to be approximately half of the width dimension of the locking piece 23, and the other end portion having the contact piece 22 has a portion facing the notch portion 21 b in the other part of the electric wire. A locking piece 24 (second locking part) that bites in and prevents it from coming off is formed by cutting and raising. Further, a protruding piece 23c protruding toward the other end (contact piece 22) is formed by cutting and raising the tip of a portion of the locking piece 23 that does not face the contact piece 22. Each connecting piece 25 is provided with two insertion holes 25a through which two projections (not shown) protruding from the blade receiving portions 30, 31 are inserted, and each insertion hole 25a has a through hole. The blade receiving portions 30 and 31 are connected to the connecting piece 25 by caulking the protrusions inserted through the connecting piece 25.

  On the other hand, the release lever 50 is made of a synthetic resin molded product, and as shown in FIGS. 8 and 9, a disc-shaped shaft portion 51 slidably mounted on a bearing base 18 provided on the body 2, A support portion that protrudes outward from a circumferential surface other than the sliding contact portion with the bearing base 18 in the shaft portion 51, and has a circumferential surface that is concentric with the shaft portion 51 and has a larger diameter than the shaft portion 51. 52 and the one end part in the circumferential direction of the support part 52 projecting from the both sides to the side, and one surface is concentric with the shaft part 51 and is a circumferential surface having a smaller diameter than the circumferential surface of the support part 52 Triangular prism-shaped pressing portions 53 and 53 and a T-shaped operation portion 54 that projects obliquely from one end portion in the circumferential direction of the support portion 52 are integrally formed. Further, on the side surface of each pressing portion 53, a portion facing the gap between the locking piece 23 and the other end portion (contact piece 22) protrudes toward the gap side, and the tip of the electric wire extends from the notch portion 21 b. A fan-shaped restricting protrusion 55 is provided so as to protrude from the main piece 21a (connecting portion) and be inclined. Further, on both side surfaces of the vertical bar portion of the operation portion 54, there are provided projections 56, 56 that are pressed against the inner surface of the vertical groove 17 of the body 2 and temporarily fixed at the non-release position.

  The release lever 50 is configured such that the distal end portion of the operation portion 54 is exposed to the outside of the body 2 through the vertical groove 17, and the shaft portion 51 is placed on the bearing base 18 provided at the bottom portion of the terminal portion storage chamber 14 b and supported. The circumferential surface of the portion 52 is brought into contact with the inner wall of the bulging portion 2a (body 2), so that the shaft portion 51 is pivotally disposed along the front-rear direction of the container body 1 as a fulcrum. After the release lever 50 is stored in the terminal portion storage chamber 14b, the pair of blade receiving portions 30, 31 are fixed to the terminal plate 21 and the connecting pieces 25, 25 of the terminal plate 21 so that they are adjacent to each other. When the conductive members 40 a, 40 b comprising the blade receiving portions 30, 31 are stored in the storage recess 14 of the body 2, the pressing portions 53, 53 of the release lever 50 are protruding pieces on the locking pieces 23, 23 of the terminal plate 21. It abuts on the rear part of 23c, 23c (see FIGS. 10 and 11).

  Next, the conductive member 40c and the release lever 50 housed in the housing recess 12 of the body 2 will be described. As shown in FIG. 1, the conductive member 40 c is formed by integrally connecting the terminal plate 21 ′ and the blade receiving portion 32, and the terminal plate 20 ′ (terminal) on the grounding pole side by the terminal plate 21 ′ and the release lever 50. Device).

  The blade receiving portion 32 is formed by processing a metal plate having spring properties, and includes a pair of blade receiving springs 32a for plug blades disposed to face each other. Further, since the terminal plate 21 ′ has the same structure as the terminal plate 21 of the terminal portion 20 except that the connecting piece 25 is eliminated, common constituent elements are denoted by the same reference numerals, and description thereof is made. Is omitted.

  Since the release lever 50 has the same shape and the same size as the release lever 50 of the terminal portion 20, the description thereof is omitted. In the release lever 50, the distal end portion of the operation portion 54 is exposed to the outside of the body 2 through the through hole 2f provided in the bottom portion of the concave portion 12, and the shaft portion 51 is attached to the bearing base 18 provided in the bottom portion of the terminal portion storage chamber 12b. By mounting, it arrange | positions rotatably along the front-back direction of the container 1 by using the axial part 51 as a fulcrum. When the release lever 50 is stored in the terminal storage chamber 12b, the conductive member 40c including the terminal plate 21 ′ and the blade receiving portion 32 fixed to the main piece 21a of the terminal plate 21 ′ is stored in the storage recess 12. The pressing portions 53, 53 of the release lever 50 abut on the rear portions of the protruding pieces 23c, 23c of the locking pieces 23, 23 of the terminal plate 21 ′.

  The conductive members 40a and 40b configured as described above store the blade receiving portions 30 and 31 in the blade receiving portion storage chambers 14a provided at the four corners of the body 2, and store the terminal plate 21 in the terminal portion storage chamber 14b. In this manner, each housing recess 14 of the body 2 is mounted. In addition, the partition 16 which partitions both the storage chambers 14a and 14b is provided with a slit 16a for inserting the connecting pieces 25 and 25 of the terminal plate 21. The conductive member 40c is housed in the housing recess 12 so that the blade receiving portion 32 is housed in the blade receiving portion housing chamber 12a of the body 2 and the terminal plate 21 'is housed in the terminal portion housing chamber 12b. In the state where the cover 3 is abutted against the opening surface of the body 2, the blade receiving portion 30 and the contact insertion port 6 of the universal outlet 5 provided on the front wall of the cover 3 face each other, and the blade receiving portion 31 and 32 and the contact insertion ports 8b and 8a of the three-pole outlet port 7 face each other.

  Next, a method for connecting electric wires to the terminal portions 20 and 20 'will be described. When connecting the electric wires to the terminal portions 20 and 20 ′, the electric wires are inserted into the gaps between the contact pieces 22 and the locking pieces 23 of the terminal plates 21 and 21 ′ through the electric wire insertion holes 15, and the tips of the electric wires are further connected. When inserted forward from the notch portion 21b, the locking portion 23a of the locking piece 23 bites into the electric wire to prevent the electric wire from coming off, and the spring force of the locking piece 23 elastically contacts the contact piece 22. Further, the tip of the locking piece 24 bites into the electric wire, thereby preventing the electric wire from coming off. Further, since the electric wire is pressed toward the locking piece 23 by the contact piece 22 and the locking piece 24, the pressing force of the locking piece 23 and the pressing force of the contact piece 22 and the locking piece 24 are balanced. An electric wire is pinched. That is, the terminal portions 20, 20 ′ are fast connection terminals that can be connected simply by inserting the electric wires into the electric wire insertion holes 15.

  By the way, there is a possibility that electric wires of various wire diameters are connected to this wiring device, and therefore the hole diameter of the electric wire insertion hole 15 is formed in accordance with the thickest electric wire. Therefore, when the thinnest electric wire is inserted into the electric wire insertion hole 15, since the gap between the electric wire and the electric wire insertion hole 15 is wide, the electric wire inserted into the gap between the contact piece 22 and the locking piece 23 Although there is a possibility that the tip will come off the notch 21b and abut against the main piece 21a and be unable to be connected to the lock piece 24, in this embodiment, each pair of contact pieces 22 and lock pieces provided on the terminal plate 21 In the release lever 50 arranged between 23 and 24, it is surrounded by the part facing the gap 60 between the contact piece 22 and the locking piece 23 (that is, the both ends of the terminal plate 21 and the connecting part (main piece 21a)). A fan-shaped restricting protrusion 55 protruding toward the gap 60 is provided on the side surface of the pressing portion 53 disposed in the space. Therefore, as shown in FIG. 12 (a), the tip of the electric wire 70 inserted inside from the electric wire insertion hole 15 is inclined from the notch portion 21b to the narrow portion side (right side in the drawing) of the main piece 21a which is the connecting portion. Even if it is, since the inclination of the electric wire 70 is controlled by the tip of the electric wire coming into contact with the restricting projection 55 provided on the pressing portion 53 of the release lever 50, the notch 21b provided with the front end of the electric wire 70 on the main piece 21a. By passing it upward (backward in the electric wire insertion direction), the electric wire 70 and the locking piece 24 can be reliably brought into contact with each other, and a normal connection state can be obtained.

  In addition, an inclined surface (first inclined surface) 55a is formed at a portion of the restriction projection 55 on the near side in the electric wire insertion direction so that the protruding amount toward the gap side increases as going to the rear side in the electric wire insertion direction. Therefore, the tip of the electric wire 70 comes into contact with the inclined surface 55a and moves to the rear side in the electric wire insertion direction along the inclined surface 55a, so that the electric wire 70 can be smoothly guided to the notch portion 21b side. (See (b) of the figure).

  In addition, since a protruding piece 23c protruding toward the contact piece 22 is formed at the tip end of the locking piece 23 that contacts the pressing portion 53 of the release lever 50, as shown in FIG. When the tip of the electric wire 70 inserted to the upper side in the figure beyond the restricting projection 55 abuts the protruding piece 23c, the tip of the electric wire 70 is detached from the notch portion 21b and the connecting portion of the main piece 21a (the main piece 21a It is possible to further restrict the inclination toward the narrow portion.

  Further, since the chamfer 21c is provided at the corner of the narrow portion (that is, the connecting portion connecting both end portions) of the main piece 21a at the portion facing the gap 60, as shown in FIG. Since the tip of the electric wire 70 inserted up to the upper side in the drawing contacts the chamfer 21c, the tip of the electric wire 70 is guided to the notch 21b, so that the electric wire 70 is inserted into the notch 21b as shown in FIG. The electric wire 70 can be connected to the terminal portions 20 and 20 ′ in a normal connection state.

  As described above, in this embodiment, by restricting the inclination of the electric wire 70 at each stage when inserting the electric wire, the tip of the electric wire 70 is prevented from being inclined and coming off from the notch portion 21b. If it bends and pushes in, the tip of the electric wire 70 may come off from the notch portion 21b and hit the connecting portion (narrow portion) of the main piece 21a that connects both ends. Therefore, in the present embodiment, as shown in FIGS. 7A and 7B, one end portion becomes closer to the rear side in the electric wire insertion direction at the connection portion between the main piece 21 a and the other end portion having the contact piece 22. Even if the tip of the electric wire 70 hits the connecting portion by providing the inclined surface (second inclined surface) 21d that is inclined in the direction approaching the side, and the inclination of the connecting portion is moderated, the angle of the connecting portion Compared with a case where the tip of the electric wire 70 is sudden, the tip of the electric wire 70 comes into contact with the connection portion and is difficult to stop, and the electric wire 70 can be easily guided to the proper insertion position.

  Moreover, the wire insertion hole 15 provided in the bottom part of the body 2 is formed so as to taper toward the rear side in the wire insertion direction as shown in FIGS. 13 (a) to 13 (c), and is inserted into the wire insertion hole 15. The electric wire 70 is inserted into the gap 60 between the locking piece 23 and the contact piece 22, but when the electric wire 70 having a diameter smaller than that of the electric wire insertion hole 15 is inserted, the tip of the electric wire 70 becomes larger. There is a possibility that the main part 21a may come into contact with the connecting part of the main piece 21a due to the inclination and the notch part 21b. Therefore, as shown in FIGS. 13D and 13E, the wire insertion hole 15 may be tapered toward the inner side and eccentric toward the gap 60, and the gap may be increased as the electric wire 70 advances through the wire insertion hole 15. Since it is guided closer to 60, the electric wire 70 can be guided to the regular insertion position.

  Further, as shown in FIGS. 14A and 14B, an arcuate wall 2d partially cut away at a portion around the electric wire insertion hole 15 on the bottom surface of the body 2 is outward (lower side in the drawing). As the electric wire 70 abuts against the wall 2d around the electric wire insertion hole 15, the portion that guides the electric wire 70 can be extended to the rear side, compared with the case where there is no wall 2d. The inclination of the electric wire 70 can be further reduced, and the electric wire 70 can be connected in a normal connection state. In addition, the connection state of the electric wire 70 in case there is no wall 2d in FIG.14 (b) is shown with the broken line.

  On the other hand, when the electric wires are removed from the terminal portions 20 and 20 ′, the operating portion 54 exposed from the longitudinal groove 17 or the through hole 2 f of the body 2 is pushed to the front side of the body 1 with one hand holding the body 1. Then, the release lever 50 rotates about the shaft portion 51, and the pressing portion 53 presses the rear position of the protruding piece 23c provided on the locking piece 23, thereby contacting the locking portion 23a biting into the electric wire. Since it bends in the direction away from the piece 22 (electric wire), the electric wire can be pulled out from the electric wire insertion hole 15 with the other hand. Thereafter, when the force for pushing the operation portion 54 is removed, the release lever 50 is rotated to the non-operation position by the spring force of the locking piece 23.

  The surface of the bulging portion 2a is provided with a concave portion 17b that is recessed in an arc shape at a portion facing the operation portion 54, and is also recessed in an arc shape at a portion facing the operation portion 54 on the inner surface of the recess portion 2g. Since the concave portion 17b is formed, it is easy to put a finger between the concave portion 17b and the operation portion 54, and the operation portion 54 can be easily pulled out when the electric wire is released. Further, in the present embodiment, since the pair of pressing portions 53 protrude from both side surfaces of the support portion 52, the two locking pieces 23 are bent simultaneously by the release lever 50, and the two electric wires are pulled out simultaneously. Can do.

  Further, in the present embodiment, the portion of the locking piece 23 (projecting piece 23c) that comes into contact with the pressing portion 53 of the release lever 50 is protruded to the contact piece 22 side (that is, the release lever 50 side) by cutting and raising. Compared with the case where the piece 23c is not cut and raised, the pressing portion 53 hits the protruding piece 23c and the locking piece 23 is bent when the rotation amount of the operation portion 54 is small. Therefore, if the operating portion 54 is rotated to the same position as when the protruding piece 23c is not cut and raised, the amount of bending of the locking piece 23 needs to be increased and plastic deformation must occur, so as shown in FIG. In the present embodiment, the support portion 52 is extended by an extension portion 52a indicated by hatching as compared with the conventional product. When the release lever 50 is released, the tip of the support portion 52 abuts against the vertical piece of the terminal board 21 so that the rotation range of the release lever 50 is restricted. By limiting the rotation range, the plastic deformation of the lock piece 23 can be prevented.

  Further, when the operation portion 54 of the release lever 50 for the voltage electrode protrudes outside the surface of the bulging portion 2a except during the release operation, the protruding portion of the operation portion 54 becomes an obstacle when the container 1 is constructed. There is a possibility that an electric wire or the like arranged around the container body 1 hits the operation unit 54 and the electric wire may come off, but in this embodiment, as shown in FIG. Substantially the entire 54 is hidden without protruding outward from the side surface of the container body 1, and at the release position, at least a part (the front end portion in the present embodiment) of the operation portion 54 protrudes outward from the side surface of the container body 1. Therefore, in the non-releasing position, the operation portion 54 does not have a portion projecting outward from the surface of the body 2, which obstructs the construction of the body 1, or an electric wire or the like disposed around the body 1 It is possible to prevent the electric wire from coming off by hitting 54. Further, the through hole 2f through which the operation portion 54 of the release lever 50 for the ground electrode is inserted is formed at the bottom of the recess 2g formed on the rear surface of the body 2, so that the front end of the operation portion 54 is the rear surface of the body 2. It is only necessary to push in so that the tip of the operation portion 54 is tilted to the bottom of the recess 2g during the release operation. Since the concave portion 2g is provided in this way and the operation portion 54 of the release lever 50 is exposed from the through hole 2f at the bottom of the concave portion 2g, the positional relationship between the release lever 50 and the terminal plates 21 and 21 ′ in the non-release position. Can be made the same positional relationship between the voltage electrode side and the ground electrode side, and the release lever 50 can be shared between the voltage electrode side and the ground electrode side. As a result, investment required for development and manufacturing can be suppressed. The effect that quality control becomes easy by reducing the types of parts can be obtained.

  FIG. 19A is an external view of a conventional release lever 50. As shown in FIG. 19B, the gap between the vertical bar portion of the operation portion 54 and the inner surface of the vertical groove 17 of the body 2 is shown. Is provided with a gap 61 for rotating the operation portion 54. When no electric wire is connected to the terminal portions 20 and 20 ′, the pressing portion 53 of the release lever 50 is pushed by the locking piece 23, so that the operation portion 54 stops at the non-release position shown in FIG. However, when the electric wire is connected, the locking piece 23 bends in a direction away from the pressing portion 53 by the electric wire, and a gap is formed between the locking piece 23 and the pressing portion 53, as shown in FIG. The operation portion 54 can move to a position where the pressing portion 53 hits the locking piece 23, and the position of the operation portion 54 is not fixed, so that the appearance is bad, and an electric wire or the like is caught on the operation portion 54 and the connection state of the electric wire is There is also a possibility of being released.

  Therefore, in the present embodiment, both protrusions 56 and 56 are provided on the side surface of the vertical bar portion of the operation portion 54, and when the operation portion 54 is rotated to the non-release position, the protrusion 56 and 56 are provided on the inner surface of the vertical groove 17. 56 is pressed, and the operation portion 54 is press-fitted into the longitudinal groove 17, so that the operation portion 54 can be temporarily fixed at the non-release position, and the release lever 50 moves carelessly to lock the electric wire. The state can be prevented from being released. Here, temporary holding means for temporarily holding the release lever 50 in the non-release position is configured by the inner surface of the vertical groove 17 and the projections 56 provided on the operation portion 54.

  Next, the connection of the conductive pins to the outlets 5 and 7 will be described. When a cylindrical conductive pin is inserted between a pair of blade receiving springs 30a facing each other from the contact insertion port 6, the conductive pins are elastically sandwiched between the pair of blade receiving springs 30a, and conductive members 40a and 40b. And the conductive pin are electrically connected to each other, and when a flat plug blade is inserted between the side edge of the pair of blade receiving springs 30a and the blade receiving spring 30b, the side edges of the pair of blade receiving springs 30a and the blades The plug blade is elastically sandwiched between the receiving spring 30b and the conductive members 40a, 40b and the plug blade are electrically connected.

When a flat plug blade is inserted between the pair of blade receiving springs 31a from the contact insertion port 8b, the plug blade is elastically sandwiched between the pair of blade receiving springs 31a, and the conductive members 40a, 40b. The plug blade is electrically connected. When a flat plug blade is inserted between the pair of blade receiving springs 32a facing from the contact insertion port 8a, the plug blade is elastically sandwiched between the pair of blade receiving springs 32a, and the conductive member 40c and the plug are plugged. The blade is electrically connected.

  Here, the pair of blade receiving springs 30a of the blade receiving part 30, the pair of blade receiving springs 31a of the blade receiving part 31, and the pair of blade receiving springs 32a of the blade receiving part 32 are opposed to each other as the distance between them becomes more forward. It is inclined so that it becomes narrower, and the front end is inclined so that the distance between the front ends increases so that the conductive pin or the plug blade can be easily inserted, so that the conductive pin or the plug blade can be easily inserted. The blade receiving spring 30b of the blade receiving portion 30 is also inclined so that the distance from the blade receiving spring 30a is narrower toward the front, and the distance between the front ends is increased toward the front so that the plug blade can be easily inserted. It is inclined so that the plug blade can be easily inserted.

  Next, a structure in which the body 1 is assembled by joining the body 2 and the cover 3 will be described. In the present embodiment, the body 1 is assembled by joining the body 2 and the cover 3 by fitting the assembly frame 4 to the fitting protrusions 2b and 3c provided on both the body 2 and the cover 3 so as to be uneven. It has become.

  On both side surfaces along the longitudinal direction of the body 2, prismatic fitting protrusions 2 b project from both sides of the bulging portion 2 a, and further concave on the front side of the fitting protrusion 2 b (left side in FIG. 5B). A groove 2c is formed. Further, on both side surfaces along the longitudinal direction of the cover 3, fitting projections 3 c having the same shape and the same dimensions as the fitting projections 2 b are provided on both side portions of the shoulder portion 3 b, and the cover is provided on the opening surface of the body 2. In a state where the three are abutted, the respective fitting protrusions 2b and 3c are arranged in a line in the front-rear direction across the concave groove 2c.

  On the other hand, the assembly frame 4 is made of a synthetic resin molded product having elasticity, and has a strip-like vertical piece 4a in which two fitting holes 4b for fitting with the fitting protrusions 2b and 3c are arranged in parallel in the longitudinal direction. Then, a locking protrusion 4c having a locking claw 4d at the tip protrudes backward from a substantially central portion sandwiched between the two fitting holes 4b on the back side of the vertical piece 4a facing the container body 1. Has been. Further, on the front end surface of the vertical piece 4a, a mounting plate for embedding and installing an embedded wiring device in the construction surface, or a flash plate having a wiring device mounting structure (hereinafter simply referred to as "plate"). A mounting claw 4e for projecting the mounting body 1 to the mounting frame or the plate frame by engaging with the engaging hole provided in FIG.

  Thus, in order to assemble the body 1 by joining the body 2 and the cover 3, the locking protrusion 4c is inserted into the concave groove 2c in a state where the body 2 and the cover 3 are abutted on the opening surface side. When the assembly frame 4 is pressed toward the opposite side surfaces of the container body 1 in the longitudinal direction, the fitting projections 2b and 3c of the body 2 and the cover 3 are fitted in the fitting holes 4b and 4b of the assembly frame 4, respectively. At the same time, the body 2 and the cover 3 are coupled, and at the same time, the locking claws 4d provided at the tips of the locking protrusions 4c are locked to the opening edges of both side walls of the cover 3, thereby It is possible to prevent the fitting protrusions 2b and 3c from falling off, and the body 2 and the cover 3 are coupled.

It is a disassembled perspective view of the outlet socket using the terminal device of this embodiment. The same as above, (a) is a front view, (b) is a right side view, and (c) is a bottom view. It is a rear view same as the above. It is an external appearance perspective view same as the above. The body used for the above is shown, (a) is a front view, (b) is a right side view, and (c) is a bottom view. The terminal board used for the above is shown, (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is a right side view, and (e) is a rear view. The terminal board used for the above is shown, (a) is an external perspective view, (b) is a perspective view partially broken. The release lever used for the above is shown, (a) is a front view, (b) is a left side view, (c) is a right side view, (d) is a top view, and (e) is a bottom view. (A) (b) is an external appearance perspective view of the cancellation | release lever used for the same as the above. It is a partially omitted side view showing the assembled state of the terminal board and the release lever used in the same. It is a perspective view which can be abbreviate | omitted partially showing the assembly state of the terminal board and release lever used for the same as the above. (A)-(e) is explanatory drawing explaining each step at the time of an electric wire connection. The same as above, (a) is a perspective view of the main part of the body, (b) and (d) are sectional views for explaining the insertion state of the electric wire, and (c) and (e) are explanatory views for explaining the shape of the electric wire insertion hole. is there. The same as the above, (a) is a perspective view of the main part of the body, (b) is a cross-sectional view for explaining the insertion state of the electric wire. It is explanatory drawing explaining the state which temporarily fixed the release lever used for the same in the non-release position. It is a side view of the state which temporarily fixed the release lever used for the same in a non-release position. The conventional terminal device is shown, (a) is sectional drawing of the principal part, (b) (c) is explanatory drawing of the connection state of an electric wire. The other conventional terminal device is shown, (a) is the external appearance perspective view of a terminal board, (b) is explanatory drawing explaining the connection state of an electric wire. The conventional cancellation | release lever is shown, (a) is an external appearance perspective view, (b)-(d) is explanatory drawing of the state assembled in the body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container 20,20 'Terminal part 21 Terminal board 21a Main piece 21b Notch part 22 Contact piece 23,24 Locking piece 50 Release lever 53 Pressing part 55 Control protrusion

Claims (8)

The container body of the wiring device accommodates a terminal plate that comes into contact with the electric wire inserted into the container body through an electric wire insertion hole that penetrates the container body, and a release means for releasing the connected state of the electric wire to the terminal plate. And
The terminal plate is formed by bending both ends of a belt-shaped metal plate having spring properties in one direction, bent at one end in a J-shape, and presses the electric wire toward the other end with the tip. And a first locking part that bites into a part of the electric wire to prevent it from coming off, and has a contact part that is formed narrower than the first locking part and contacts the electric wire at the other end. A connecting portion connecting the first portion and the contact portion is provided with a notch portion for allowing the tip of the electric wire inserted between the first locking portion and the contact portion, and the other end portion of the electric wire to the portion facing the notch portion. A second locking part that cuts into the other part and prevents it from coming off,
The release means includes an operation portion that is exposed to the surface of the container body and is manually operated, a shaft portion that is pivotally supported inside the container body to allow the operation portion to rotate, and both ends of the terminal plate It is arranged in a space surrounded by the connecting portion, and when the operation portion rotates about the shaft portion as a fulcrum in response to a manual operation, the pressed portion of the first locking portion not facing the contact portion is made into a spring force. And a pressing portion that presses away from the contact portion, and protrudes toward the gap in a portion of the release means that faces the gap between the first locking portion and the other end. A terminal device comprising a restriction projection for restricting a tip of an electric wire from being detached from the notch and being inclined toward the connecting portion.   The first inclined surface is provided on the front side of the restriction projection in the electric wire insertion direction so that the amount of protrusion toward the gap side increases toward the rear side in the electric wire insertion direction. The terminal device according to 1.   Providing a protruding portion that protrudes toward the other end portion and regulates the inclination of the electric wire by cutting and raising the front end side of the portion of the first locking portion that is not opposed to the other end portion. The terminal device according to claim 1 or 2.   The second inclined surface that is inclined in a direction approaching the one end side as it goes to the rear side in the electric wire insertion direction is provided at a connection portion of the other end portion with the connecting portion. Item 4. The terminal device according to any one of Items 1 to 3.   The terminal device according to claim 1, wherein a chamfer is provided at a corner of the joint portion facing the gap.   The terminal device according to any one of claims 1 to 5, wherein the wire insertion hole is tapered toward the inner side and is eccentric toward the gap.   The terminal device according to any one of claims 1 to 6, wherein a wall projecting outward is provided at a portion around the wire insertion hole on the surface of the vessel body.   The operation unit is pivotally supported between a release position for releasing the electric wire connection state and a non-release position, and is provided with a temporary holding means for temporarily holding the operation unit at the non-release position. The terminal device according to any one of claims 1 to 7.

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