Terminal device, switch, circuit breaker, and distribution board

Abstract

To provide a terminal device, a switch, a circuit breaker, and a distribution board in which connection work is easily and surely performed.SOLUTION: The terminal strip device B1 includes a contact 1, a spring member 2, an adjustment member 3, and a link mechanism 4. The spring member 2 applies a contact pressure to the terminal strip 1 against the wire W1. The adjusting member 3 presses the spring member 2 toward the DR1 in the first direction of the axial direction. The link mechanism 4 regulates and releases the axial movement of the adjusting member 3. The spring member 2 has an adjusting member pushing part 201 for pushing the adjusting member 3 to the DR2 in the second direction and a conductive body pushing part 202 for pushing the conductive body to the DR2 in the second direction. The link mechanism 4 includes a restricting portion 401 for restricting the movement of the adjusting member pushing portion 201, and a pushed portion 402 to be pushed by the wire W1. When the pressed portion 402 is pressed in a state where the movement of the adjusting member 3 toward the DR2 in the second direction is restricted, the restriction by the restricting portion 401 is released. The link mechanism 4 includes the second lever 42, and the second lever 42 includes the reinforcing rib 424.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a terminal device, a switch, a circuit breaker, and a distribution board, and more particularly to a terminal device having a spring member, a switch having the terminal device, a circuit breaker having the switch, and a distribution board having the circuit breaker. [Background technology]

[0002] Patent Document 1 discloses a main breaker (hereinafter referred to as a conventional example) equipped with screw terminals for connecting electric wires, and a screwless terminal unit connected to the screw terminals for connecting electric wires.

[0003] The screwless terminal unit has a screw terminal insertion bar that is connected to the wire connection screw terminal of the trunk breaker, screwless terminals that are electrically connected to the screw terminal insertion bar, and a resin case that covers the screw terminal insertion bar and screwless terminals. The screw terminal insertion bar of the screwless terminal unit is connected to the wire connection screw terminal of the trunk breaker, and electric wires are connected to the screwless terminal of the screwless terminal unit.

[0004] When connecting an electric wire to a screwless terminal, a worker first inserts a tool through a tool insertion opening formed in the resin case and uses the tool to push and move the screwless terminal. The screwless terminal has an electric wire insertion hole, and when the worker pushes and moves the screwless terminal with the tool, the electric wire insertion hole aligns with the electric wire insertion opening formed in the resin case. In this state, the worker inserts the electric wire into the electric wire insertion opening and the electric wire insertion hole, and then removes the tool from the tool insertion opening. The restoring force of the screwless terminal causes the inner edge of the electric wire insertion hole to push the electric wire, forcing the electric wire against the screw terminal insertion bar and making an electrical connection. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-201404 Summary of the Invention [Problem to be solved by the invention]

[0006] In the case of the conventional trunk breaker, when performing the wiring work, the worker needs to insert the wire into the resin case while inserting the tool into the resin case, which makes the wiring work difficult.

[0007] An object of the present disclosure is to provide a terminal device, a switch, a circuit breaker, and a distribution board that allow easy and reliable wiring work. [Means for solving the problem]

[0008] A terminal device according to one aspect of the present disclosure includes a terminal plate, a spring member, an adjustment member, a link mechanism, and a case. The terminal plate is electrically connected to an electric path between the terminal plate and a secondary terminal. The spring member applies contact pressure to a conductor of a primary electric wire in a direction that brings the terminal plate into contact with the terminal plate. The adjustment member changes the amount of deformation of the spring member by moving in the axial direction. The link mechanism restricts and releases the axial movement of the adjustment member. The case accommodates the terminal plate, the spring member, the adjustment member, and the link mechanism. One of the axial directions is designated a first direction, and the other direction is designated a second direction. The adjustment member is movable between a first position in the axial direction and a second position that is closer to the first direction than the first position. The adjustment member is capable of pushing the spring member in the first direction and being pushed by the spring member in the second direction. The spring member has an adjustment member pushing portion that pushes the adjustment member in the second direction, and a conductor pushing portion that pushes the conductor in the second direction. The adjustment member pushing portion and the conductor pushing portion are movable in conjunction with each other in the axial direction. The case has an electric wire insertion hole into which the electric wire is inserted. The link mechanism has a restricting member having a restricting portion, and a pushed portion. The restricting portion is capable of restricting movement of the adjustment member or the adjustment member pushing portion in the second direction. The pushing portion is pushed by the electric wire inserted through the electric wire insertion hole. The link mechanism is capable of changing states between a first state in which movement of the adjustment member in the first position is not restricted, and a second state in which the restricting portion restricts movement of the adjustment member in the first direction or the adjustment member pushing portion that pushes the adjustment member in the second position. When the pushing portion is pushed by the electric wire and moves in the second state, the restriction by the restricting portion in the second state is released, and the conductor pushing portion moves in the second direction to push the conductor in the second direction. The link mechanism has a first lever pushed by the electric wire, a second lever that restricts the movement of the restricting portion, and a connecting member that connects the first lever and the second lever. The first lever has a first lever body and a first lever shaft that is provided in an intermediate portion of the first lever body and rotatably supported by the case.The first lever has a first lever pressed portion provided at an end of the first lever body on the first orientation side and pressed by the pressed portion. The second lever has a second lever body, a second lever axle provided at the end of the second lever body on the second orientation side and rotatably supported on the case, a second lever restricting portion formed on the second lever body and restricting movement of the restricting member, and a reinforcing rib protruding from the second lever body. The restricting member has a restricting member body, a restricting member axle provided at an intermediate portion of the restricting member body and rotatably supported on the case, the restricting portion provided at one end of the restricting member body, and a regulated portion provided at the other end of the restricting member body and restricted in movement by the second lever. One end of the connecting member is connected to a portion closer to the first orientation side than the first lever axle. The other end of the connecting member is connected to a portion closer to the first orientation side than the second lever axle. The reinforcing rib extends from an end of the second lever body in a second lever shaft extension direction in which the second lever shaft extends, in a direction intersecting the second lever shaft extension direction.

[0009] A switch according to one aspect of the present disclosure includes the terminal device, a contact portion inserted into an electrical path between the terminal device and a secondary terminal, and a switching mechanism portion that opens and closes the contact portion.

[0010] A circuit breaker according to one aspect of the present disclosure includes the switch and a tripping device that forcibly opens the contact portion via the switching mechanism portion.

[0011] A distribution board according to one aspect of the present disclosure includes the circuit breaker and a box that houses the circuit breaker. [Effects of the Invention]

[0012] According to the terminal device, switch, circuit breaker, and distribution board of the present disclosure, wiring work can be easily and reliably performed. [Brief explanation of the drawings]

[0013] [Figure 1]FIG. 1 is a front view of a circuit breaker according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is an external perspective view of the circuit breaker. [Figure 3] FIG. 3 is a circuit block diagram of the circuit breaker. [Figure 4] FIG. 4 is a front view of the distribution board according to the embodiment. [Figure 5] FIG. 5 is a perspective view of a terminal device included in the circuit breaker. [Figure 6] FIG. 6 is a perspective view of a link mechanism included in the terminal device. [Figure 7] FIG. 7 is a perspective view of a second lever of the terminal device. [Figure 8] FIG. 8 is a front view of the second lever of the same. [Figure 9] FIG. 9 is a side view of the second lever of the same. [Figure 10] FIG. 10 is a cross-sectional view of the terminal device for explaining a wire connection operation to the terminal device. [Figure 11] FIG. 11 is a cross-sectional view of the terminal device for explaining a wire connection operation to the terminal device. [Figure 12] FIG. 12 is a cross-sectional view of the terminal device for explaining a wire connection operation to the terminal device. [Figure 13] FIG. 13 is a cross-sectional view of the terminal device for explaining a wire connection operation to the terminal device. [Figure 14] FIG. 14 is a cross-sectional view of the terminal device for explaining a wire connection operation to the terminal device. [Figure 15] FIG. 15 is a perspective view of the terminal device as viewed from the front side. DETAILED DESCRIPTION OF THE INVENTION

[0014] The terminal device, switch, circuit breaker, and distribution board according to the present disclosure will be described in detail below with reference to the drawings. However, the drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0015] (1) Overview As shown in FIG. 10, a terminal device B1 according to the present disclosure includes a terminal board 1 (hereinafter referred to as a first terminal board 1), a spring member 2, an adjustment member 3, a link mechanism 4, and a case 5.

[0016] The first terminal board 1 is electrically connected to an electrical path A16 between the first terminal board 1 and the secondary terminal A15.

[0017] The spring member 2 applies a contact pressure to the conductor W10 of the primary-side electric wire W1 in a direction that causes the conductor W10 to come into contact with the first terminal plate 1.

[0018] The adjustment member 3 changes the amount of deformation of the spring member 2 by moving in the axial direction.

[0019] The link mechanism 4 restricts and releases the restriction on the movement of the adjustment member 3 in the axial direction.

[0020] The case 5 accommodates the first terminal board 1, the spring member 2, the adjustment member 3, and the link mechanism 4.

[0021] One of the axial directions is referred to as a first direction DR1, and the other direction is referred to as a second direction DR2.

[0022] The adjustment member 3 is movable between a first position (see FIG. 10) in the axial direction and a second position (see FIG. 12) that is closer to the first direction DR1 than the first position. The adjustment member 3 can press the spring member 2 in the first direction DR1 and be pressed by the spring member 2 in the second direction DR2.

[0023] The spring member 2 has an adjustment member pushing portion 201 that pushes the adjustment member 3 in the second direction DR2, and a conductor pushing portion 202 that pushes the conductor W10 in the second direction DR2. The spring member 2 has the adjustment member pushing portion 201 and the conductor pushing portion 202 that are movable in the axial direction in conjunction with each other.

[0024] The case 5 has a wire insertion hole 500 into which the wire W1 is inserted.

[0025] The link mechanism 4 has a restricting portion 401 and a pushing portion 402 (pushing member). The restricting portion 401 can restrict movement of the adjustment member 3 or the adjustment member pushing portion 201 in the second direction DR2. The pushing portion 402 is pushed by the electric wire W1 inserted through the electric wire insertion hole 500. The link mechanism 4 can change states between a first state (see FIG. 10 ) in which movement of the adjustment member 3 located at the first position in the first direction DR1 is not restricted, and a second state (see FIG. 12 ) in which the restricting portion 401 restricts movement of the adjustment member 3 located at the second position or the adjustment member pushing portion 201 pushing the adjustment member 3 in the second direction DR2.

[0026] Specifically, the link mechanism 4 has a first lever 41 that is pushed by the electric wire W1, a second lever 42 that restricts the movement of the restricting portion 401, and a connecting member 43 that connects the first lever 41 and the second lever 42. The restricting portion 401 is formed on the restricting member 40. The first lever 41 has a first lever body 410, a first lever shaft portion 411 that is provided in an intermediate portion of the first lever body 410 and rotatably supported on the case 5, and a first lever pushed portion 412 that is pushed by the pushed portion 402 at the end on the first direction DR1 side. The second lever 42 has a second lever body 420, a second lever shaft 421 provided at an end of the second lever body 420 on the second direction DR2 side and rotatably supported on the case 5, a second lever restricting portion 423 formed on the second lever body 420 and restricting movement of the restricting member 40, and a reinforcing rib 424 protruding from the second lever body 420. The restricting member 40 has a restricting member body 400, a restricting member shaft 404 provided at an intermediate portion of the restricting member body 400 and rotatably supported on the case 5, a restricting portion 401 provided at one end of the restricting member shaft 404, and a regulated portion 405 provided at the other end of the restricting member shaft 404 and whose movement is restricted by the second lever 42. One end of the connecting member 43 is connected to a portion closer to the first direction DR1 than the first lever shaft 411. The other end of the connecting member 43 is connected to a portion on the first direction DR1 side of the second lever shaft 421. The reinforcing rib 424 extends in a direction intersecting the second lever shaft extension direction 4210 from an end of the second lever body 420 in the second lever shaft extension direction 4210 in which the second lever shaft 421 extends.

[0027] When the pushing portion 402 is pushed and moved by the electric wire W1 in the second state, the restriction by the restricting portion 401 in the second state is released (see Figure 13), and the conductor pushing portion 202 moves in the second direction DR2 and pushes the conductor W10 in the second direction DR2 (see Figure 14).

[0028] Here, "connecting" two components is not limited to a connection in which the two components are directly connected, but may also include a connection in which the two components are connected via one or more circuit components.

[0029] In the following description, the front-rear, up-down, left-right directions indicated by arrows in the accompanying drawings are defined as the front-rear, up-down, left-right directions of the circuit breaker A1 and the terminal device B1. However, these directions do not limit the usage state of the circuit breaker A1 and the terminal device B1.

[0030] As shown in Figures 1 to 4, the switch D1 of the present disclosure includes a terminal device B1, a contact portion A11 inserted into an electrical path A16 between the terminal device B1 and a secondary side terminal A15, and an opening / closing mechanism portion A12 that opens and closes the contact portion A11.

[0031] The circuit breaker A1 according to the present disclosure includes a switch D1 and a trip device A14 that forcibly opens the contact A11 via a switching mechanism A12. The circuit breaker A1 according to the present disclosure is used, for example, as a main switch (also called a trunk breaker) of a residential distribution panel (hereinafter referred to as a residential panel). When the circuit breaker A1 is used as a main switch, a secondary terminal A15 of the circuit breaker A1 is connected to a plurality of branch switches housed in the residential panel.

[0032] The distribution board C1 according to the present disclosure includes a circuit breaker A1 and a box C10 that houses the circuit breaker A1.

[0033] In the terminal device B1, the switch D1, the circuit breaker A1, and the distribution board C1 according to the present disclosure, wiring work can be easily and reliably performed.

[0034] (2) Details of the circuit breaker according to the first embodiment As shown in FIGS. 1 to 3 and 5, the circuit breaker A1 according to the first embodiment (hereinafter simply referred to as the circuit breaker A1) includes three terminal devices B1, three contact units A11, and a switching mechanism unit A12. The circuit breaker A1 also includes a trip device A14 and an outer case 7. The outer case 7 houses the terminal device B1, the contact units A11, and the switching mechanism unit A12. More specifically, the outer case 7 houses the three terminal devices B1, the three contact units A11, the switching mechanism unit A12, and the trip device A14. The circuit breaker A1 is a three-pole earth leakage circuit breaker with a neutral phase loss protection function, and is used as a main switch in a single-phase three-wire residential panel. However, the circuit breaker A1 may be a circuit breaker with less than three poles or four or more poles, a circuit breaker without either or both of the neutral phase loss protection function and the earth leakage interruption function, or a disconnector.

[0035] The contact portion A11 has a fixed contact electrically connected to the first terminal plate 1 of the terminal device B1 and a movable contact electrically connected to the secondary terminal A15 (see FIG. 3). Note that the movable contact may be provided on the first terminal plate 1 of the terminal device B1, and the fixed contact may be provided on the secondary terminal A15. The movable contact is movable between a closed state in which it is in contact with and conductive to the fixed contact, and an open state in which it is spaced from the fixed contact by a sufficient insulating distance.

[0036] The opening and closing mechanism A12 can open and close the contact A11 by moving the movable contact in response to the operation of the operating handle A17. The terminal device B1, the contact A11, and the opening and closing mechanism A12 constitute a switch D1.

[0037] When the trip device A14 detects that an abnormal current such as an overload current, a short circuit current, or a leakage current is flowing through the electric circuit A16, it forcibly opens the three contacts A11 via the switching mechanism A12. In addition, when the trip device A14 detects that the neutral conductor is open-phase, it also forcibly opens the three contacts A11 via the switching mechanism A12.

[0038] The outer case 7 includes a third housing 71 and a fourth housing 72, which are formed by dividing the outer case 7 by a second mating surface PL2. More specifically, the outer case 7 is configured by joining the third housing 71 and the fourth housing 72, which are formed by dividing the outer case 7 into two halves, front and rear, along the second mating surface PL2 parallel to the front surface of the outer case 7 (see FIGS. 1 to 3). Here, the term "parallel" means that the two surfaces are not necessarily perfectly parallel, but may also mean that the two surfaces intersect at an angle of several degrees. Furthermore, the second mating surface PL2 is not necessarily a single plane, but may be a mating surface formed by a series of multiple planes parallel to the front surface of the outer case 7.

[0039] The third housing 71 and the fourth housing 72 are both formed from a molded body of electrically insulating synthetic resin. The third housing 71 is formed in a box shape with an open front face. The fourth housing 72 is formed in a box shape with an open rear face. The fourth housing 72 is placed over the front face of the third housing 71, and the third housing 71 and the fourth housing 72 are joined together by an appropriate method such as screwing to form the outer case 7.

[0040] As described above, the third housing 71 and the fourth housing 72 constituting the outer case 7 accommodate three terminal devices B1, three contact portions A11, the switching mechanism portion A12, the tripping device A14, the secondary terminal A15, the electrical circuit A16, and the operating handle A17. Three recesses 711 are provided side by side on the front surface of the upper part of the third housing 71 (see FIG. 2). Each of these three recesses 711 accommodates one terminal device B1. Three window holes 7220 are provided side by side on the front surface of the upper part of the fourth housing 72 (see FIGS. 1 and 2). Parts of the three terminal devices B1 are exposed through these three window holes 7220 (see FIGS. 1 and 2). In addition, three wire insertion holes (not shown) are provided on the top surface of the fourth housing 72, and parts of the three terminal devices B1 are exposed through these three wire insertion holes. Here, the case 5 of the terminal device B1 is provided with a wire insertion hole 500 for inserting the conductor W10 of the primary-side wire W1, and the wire insertion holes 500 of the three terminal devices B1 are exposed from the three wire insertion holes. Thus, the wire W1 passed through the wire insertion hole of the fourth housing 72 is inserted into the terminal device B1 from the wire insertion hole 500 of the terminal device B1 and connected to the first terminal board 1.

[0041] The outer case 7 is provided with a plurality of openings 74 that penetrate the outer case 7 in the front-rear direction (see FIG. 1). The rear surface of the outer case 7 may be provided with a mounting member for mounting the outer case 7 on a mounting rail such as a DIN rail, allowing an operator to mount the outer case 7 at a desired position on the mounting rail.

[0042] (2-1) Terminal device The configuration of the terminal device B1 described below is common to the three terminal devices B1.

[0043] As described above, the terminal device B1 includes the first terminal board 1, the spring member 2, the adjustment member 3, the link mechanism 4, and the case 5. The terminal device B1 further includes a display member 8.

[0044] (2-1-1) 1st terminal board The first terminal plate 1 is electrically connected to an electric path A16 between the first terminal plate 1 and the secondary terminal A15. The first terminal plate 1 has a contact piece 10 having a rectangular shape.

[0045] (2-1-2) Spring material The spring member 2 applies contact pressure to the conductor W10 of the primary-side electric wire W1 in a direction that causes the conductor W10 to contact the terminal plate 1. The spring member 2 has a U-shaped main portion 21 and an arc-shaped contact pressure portion 22 that protrudes from one end of the main portion 21 toward the other end. The main portion 21 and the contact pressure portion 22 are integrally formed from a strip-shaped metal plate (for example, a stainless steel plate).

[0046] The pressure contact portion 22 is provided with a wire insertion opening 23. The wire insertion opening 23 penetrates a portion of the pressure contact portion 22 closer to the main portion 21 in the thickness direction. The wire insertion opening 23 according to the first embodiment is rectangular when viewed in the direction in which the electric wire W1 passes. The other tip portion of the main portion 21 and the upper end portion of the contact piece 10 of the first terminal board 1 are inserted into the wire insertion opening 23. When no external force is applied, the spring member 2 is maintained in a state in which the contact piece 10 abuts against the rear end edge of the wire insertion opening 23 in the pressure contact portion 22 (see FIG. 13). Hereinafter, this state may be referred to as the first state of the spring member 2.

[0047] The spring member 2 has an adjustment member pushing portion 201 that pushes the adjustment member 3 in the second direction DR2. The adjustment member pushing portion 201 is configured by the front end portion of the main portion 21.

[0048] The spring member 2 has a conductor pushing portion 202 that pushes the conductor W10 in the second direction DR2. The conductor pushing portion 202 is configured by the inner edge on the rear side of the wire insertion opening 23 formed in the pressure contact portion 22.

[0049] The adjustment member pressing portion 201 and the conductor pressing portion 202 can move in the axial direction in unison. That is, the portion of the main portion 21 where the adjustment member pressing portion 201 is formed and the contact pressure portion 22 where the conductor pressing portion 202 is formed move together in the first direction DR1 or the second direction DR2 due to the elastic deformation of the spring member 2.

[0050] (2-1-3) Adjustment member As shown in Fig. 10, the adjustment member 3 changes the deformation amount of the spring member 2 by moving in the axial direction (first direction DR1 or second direction DR2). In the first embodiment, the adjustment member 3 is made of a screw and is rotatably arranged in the case 5. The adjustment member 3 moves in the axial direction in response to rotation, and by moving in the axial direction, it moves in a direction that deforms the spring member 2 (downward in Fig. 10) to adjust the contact pressure.

[0051] The adjustment member 3 has a cylindrical main body 30 and a screw thread 31 formed integrally with the main body 30 on the outer peripheral surface of the main body 30. The main body 30 also has a hexagonal hole 300 (see FIG. 15) along the axial direction of the main body 30.

[0052] The adjustment member 3 is movable between a first position (see FIG. 10) in the axial direction and a second position (see FIG. 12) that is closer to the first position in the first direction DR1. The adjustment member 3 can be rotated by a tool inserted into the hexagonal hole 300 to press the spring member 2 in the first direction DR1. Furthermore, the adjustment member 3 can be pressed in the second direction DR2 by the adjustment member pressing portion 201 of the spring member 2 when no tool is inserted into the hexagonal hole 300.

[0053] Although the adjustment member 3 according to the first embodiment is made of a screw, the adjustment member 3 does not have to be made of a screw. That is, the adjustment member 3 may move linearly in the axial direction rather than moving spirally in the axial direction. Furthermore, instead of the hexagonal hole 300, the adjustment member 3 may be formed with a portion that can be operated with a tool, such as a hole, a recess, or a protrusion of a different shape.

[0054] (2-1-4) Case The case 5 accommodates the first terminal board 1, the spring member 2, the adjustment member 3, and the link mechanism 4. As shown in FIG. 5 , the case 5 is formed in a box shape whose left-to-right width is significantly shorter than its front-to-back width and its top-to-bottom height. The case 5 includes a first housing 5A and a second housing 5B, which are formed by dividing the case 5 by a first mating surface PL1. More specifically, the case 5 includes the first housing 5A and the second housing 5B, which are formed by dividing the case 5 into two by the first mating surface PL1, which passes through the center of the case 5 in the left-to-right direction. The first mating surface PL1 may pass through the center of the wire insertion hole 500 opening on the front surface of the case 5, or may be offset from the center of the case 5 in the left-to-right direction. In the first embodiment, the normal direction of the first mating surface PL1 and the normal direction of the second mating surface PL2 intersect.

[0055] The case 5 is assembled by snap-in coupling multiple engaging portions (not shown) provided on the second housing 5B to multiple engaged portions (not shown) provided on the first housing 5A. The engaging portions are hooks with claws at their tips. The engaged portions are engaging holes with steps onto which the claws at the tips of the engaging portions hook. When the first housing 5A and the second housing 5B are butted together at the first butting surface PL1, the multiple engaging portions snap-in to the multiple engaged portions, respectively, thereby coupling the first housing 5A and the second housing 5B together.

[0056] 10, a first accommodating space 501, a second accommodating space 502, and a third accommodating space 503 are provided within the case 5. The first accommodating space 501 accommodates the first terminal board 1. The first accommodating space 501 is connected to an electric wire insertion hole 500 that opens on the top surface of the case 5 by a guide path 50 provided in the upper rear part of the case 5. The guide path 50 guides the conductor W10 of the electric wire W1 that is inserted through the electric wire insertion hole 500 into the space in which the first terminal board 1 is disposed.

[0057] The second housing space 502 houses the spring member 2. A spring support portion 53 that supports the spring member 2 is provided in the second housing space 502. When viewed from the left and right, the spring support portion 53 is formed in a shape in which a rectangular plate-like portion protrudes from the peripheral surface of a cylinder. The spring support portion 53 supports the spring member 2 by being disposed inside the main portion 21 of the spring member 2.

[0058] The third housing space 503 houses the adjustment member 3 and the display member 8. The third housing space 503 is formed in a cylindrical shape. A thread groove 504 that fits with the thread 31 of the adjustment member 3 is formed on the inner peripheral surface of the third housing space 503.

[0059] Furthermore, an insertion hole 55 through which a connecting conductor is inserted is provided on the left side surface of the case 5 (the side surface of the second housing 5B) (see FIG. 5).

[0060] When the adjustment member 3 housed in the third housing space 503 is rotated left (counterclockwise) from outside the case 5, it moves from the third housing space 503 towards the second housing space 502.

[0061] (2-1-5) Link mechanism 6 and 10 , the link mechanism 4 restricts and releases the restriction on axial movement of the adjustment member 3. The link mechanism 4 has a restricting portion 401 and a pushing portion 402. The restricting portion 401 can restrict movement of the adjustment member 3 or the adjustment member pushing portion 201 in the second direction DR2. The pushing portion 402 is pushed by the electric wire W1 inserted through the electric wire insertion hole 500.

[0062] The link mechanism 4 has a first lever 41 that is pushed by the electric wire W1, a second lever 42 that restricts the movement of the restricting portion 401 or has the restricting portion 401, and a connecting member 43 that connects the first lever 41 and the second lever 42.

[0063] In the first embodiment, the first lever 41 has a first lever body 410, a first lever shaft portion 411 provided in the middle portion of the first lever body 410 and rotatably supported on the case 5, and a first lever pushing portion 412 at the end on the first direction DR1 side that is pushed by the pushing portion 402.

[0064] The pushed portion 402 is configured by a pushed member separate from the first lever 41. In the first state, the first lever 41 has a first lever pushed portion 412 that is pushed by the pushed portion 402 at the end on the first direction DR1 side, and has a display portion 403 at the end on the second direction DR2 side.

[0065] The display unit 403 faces the outside of the case 5 through an opening 505 (see FIG. 5) formed in the case 5. The display unit 403 moves in conjunction with the movement of the pushing portion 402 to indicate that a predetermined length of the electric wire W1 has been inserted through the electric wire insertion hole 500. The display unit 403 faces the outside of the outer case 7 through the opening 505 of the case 5 and the opening 74 of the outer case 7 (see FIGS. 1 and 15). The display unit 403 also makes it possible to know whether the device is in the first state or the second state.

[0066] As shown in Figures 7 to 9, the second lever 42 has a second lever main body 420, a second lever shaft portion 421 provided at the end of the second lever main body 420 on the second direction DR2 side in the first state and rotatably supported on the case 5, a second lever regulating portion 423 formed on the second lever main body 420 and regulating the movement of the regulating member 40, and a reinforcing rib 424 protruding from the second lever main body 420.

[0067] The reinforcing rib 424 extends from the end (both ends in this embodiment) of the second lever body 420 in the second lever shaft extension direction 4210 in which the second lever shaft 421 extends, in a direction intersecting the second lever shaft extension direction 4210.

[0068] The reinforcing rib 424 is formed at a position overlapping the second lever restricting portion 423 when viewed in the second lever shaft extending direction 4210 .

[0069] 6, the restricting portion 401 is formed on the restricting member 40. The restricting member 40 has a restricting member main body 400, a restricting member shaft 404 that is provided in the middle of the restricting member main body 400 and rotatably supported by the case 5, the restricting portion 401 that is provided at one end of the restricting member shaft 404, and a restricted portion 405 that is provided at the other end of the restricting member shaft 404 and whose movement is restricted by the second lever 42.

[0070] The connecting member 43 is a rod-shaped connecting member 43, and one end of the connecting member 43 is inserted into a groove 413 formed in a portion closer to the first direction DR1 than the first lever shaft 411, and is rotatably connected to the first lever 41. The other end of the connecting member 43 is inserted into a groove 422 formed in a portion closer to the first direction DR1 than the second lever shaft 421, and is rotatably connected to the second lever 42.

[0071] The link mechanism 4 has an elastic member 44 that applies a force to the first lever 41 , an elastic member 45 that applies a force to the second lever 42 , and an elastic member 46 that applies a force to the restricting portion 401 .

[0072] In the first embodiment, the elastic member 44 is configured with a coil spring 44A that applies an upward force (a clockwise moment on the first lever 41 in FIG. 10) to a portion of the elastic member 44 that is closer to the first direction DR1 than the first lever shaft 411. The elastic member 45 is configured with a torsion coil spring 45A that applies an upward force (a clockwise moment on the second lever 42 in FIG. 10) to a portion of the elastic member 45 that is closer to the first direction DR1 than the second lever shaft 421. The elastic member 46 is configured with a torsion coil spring 46A that applies a force in the first direction DR1 to the restricting portion 401 of the restricting member 40 (a counterclockwise moment on the restricting member 40 in FIG. 10).

[0073] The link mechanism 4 can change between a first state and a second state. The first state is a state in which the movement of the adjustment member 3, which is located at the first position, in the first direction DR1 is not restricted, as shown in FIG.

[0074] The second state refers to a state in which the restricting portion 401 restricts the movement of the adjustment member 3 located at the second position or the adjustment member pushing portion 201 pushing the adjustment member 3 in the second direction DR2, as shown in FIG.

[0075] When the pushing portion 402 is pushed and moved by the electric wire W1 in the second state, the restriction by the restricting portion 401 in the second state is released (see Figure 13), and the conductor pushing portion 202 moves in the second direction DR2 and pushes the conductor W10 in the second direction DR2 (see Figure 14).

[0076] (2-2) Wiring procedure for terminal device Next, the procedure for connecting the wire W1 to the terminal device B1 (wire connection procedure) will be described.

[0077] 10, in the first state, the contact piece 10 is maintained in contact with the conductor pushing portion 202 at the rear end edge of the wire insertion opening 23 of the spring member 2. Also, in the first state, the portion of the pressure contact portion 22 of the spring member 2 on the first direction DR1 side of the wire insertion opening 23 crosses the guide path 50, preventing the wire W1 from entering the back of the guide path 50 and inhibiting dirt and foreign matter from entering the back of the guide path 50. In other words, the portion of the pressure contact portion 22 of the spring member 2 on the first direction DR1 side of the wire insertion opening 23 functions as a blocking portion (lid).

[0078] From this state, in order to connect the conductor W10 of the electric wire W1 to the first terminal board 1, the worker rotates the adjustment member 3 counterclockwise using a tool such as a hex wrench. As shown in FIG. 11 , by rotating the adjustment member 3 counterclockwise, it moves in a first direction DR1 from the third housing space 503 toward the second housing space 502. As the adjustment member 3 moves in the first direction DR1, it deflects the spring member 2. At this time, the torsion coil spring 46A presses the restricting portion 401 of the restricting member 40 against the adjustment member 3, and when the front end of the adjustment member 3 moves in the first direction DR1, the restricting portion 401 presses the front end of the adjustment member 3 in the first direction DR1.

[0079] Next, the worker uses the tool to further rotate the adjustment member 3 counterclockwise. As a result, as shown in FIG. 12 , the regulated portion 405 of the regulating member 40 presses downward the portion of the second lever shaft 421 closer to the first direction DR1 and gets caught on a step 423A formed on the second lever 42, restricting movement of the regulated portion 405 in the first direction DR1 and restricting movement of the regulating portion 401 in the second direction DR2, thereby entering the second state. The step 423A constitutes the second lever regulating portion 423 that restricts movement of the regulating portion 401 of the regulating member 40.

[0080] The main portion 21 of the spring member 2 is pressed in the first direction DR1, and the wire insertion opening 23 formed in the pressure contact portion 22 is positioned within the guide path 50 of the case 5.

[0081] Here, the second lever 42 receives a force from the regulating member 40. Specifically, the adjustment member 3 is pressed in the second direction DR2 by the adjustment member pressing portion 201 of the spring member 2. In the regulating member 40, the restricting portion 401 is pressed in the second direction DR2 by the adjustment member 3, and the restricted portion 405 is pressed in the second direction DR2 by the step portion 423A (second lever restricting portion 423) of the second lever 42. The regulating member 40 comes to rest when a moment around the regulating member shaft portion 404 generated by the pushing force of the spring member 2 and a moment around the regulating member shaft portion 404 generated by the pushing force of the second lever 42 are balanced.

[0082] The second lever regulating portion 423 is pushed in the first direction DR1 by the regulated portion 405 of the regulating member 40 at the step portion 423A, but even if the step portion 423A is pushed in the first direction DR1, the extension line of the vector of the pushing force passes near the second lever shaft portion 421, so no large moment is generated around the second lever shaft portion 421, the second lever 42 comes to a standstill, and the step portion 423A receives a force in the first direction DR1 from the regulated portion 405.

[0083] At this time, if the rigidity (bending rigidity in the extension direction) of second lever body 420 of second lever 42 is low, step portion 423A will receive a force in first direction DR1 from regulated portion 405, causing second lever body 420 to bend, and step portion 423A will come off regulated portion 405, making it impossible to maintain the restriction on movement of regulating member 40. For this reason, reinforcing rib 424 is provided to improve the rigidity (bending rigidity) of second lever 42 (particularly second lever body 420).

[0084] The reinforcing rib 424 extends in a direction intersecting the second lever shaft extension direction 4210 from an end of the second lever body 420 in the second lever shaft extension direction 4210 in which the second lever shaft 421 extends. If the reinforcing rib 424 protrudes from an intermediate portion of the second lever body 420 in the second lever shaft extension direction 4210, the reinforcing rib 424 protrudes from a surface of the side of the second lever body 420 that faces a direction intersecting the second lever shaft 421 (a surface that faces the direction of movement due to rotation of the second lever body 420), which increases the length of the second lever 42 in the direction of movement due to rotation of the second lever body 420. In this case, it becomes necessary to secure space for the reinforcing rib 424 in addition to the stroke due to rotation of the second lever body 420, which results in an increase in the size of the case 5 of the terminal device B1. Therefore, in order to reduce the protruding length in the movement direction due to rotation of the second lever body 420, the reinforcing rib 424 extends from the end of the second lever body 420 in the second lever shaft extension direction 4210 in a direction intersecting the second lever shaft extension direction 4210. This makes it possible to prevent the space occupied by the second lever 42 from increasing in the rotation (swing) direction of the second lever 42 due to the rotation (swing) of the second lever 42. Furthermore, the rigidity of the second lever 42 can be improved without requiring a design change in which the material of the second lever 42 is changed to a metal or the like that has higher rigidity than resin.

[0085] Furthermore, by extending the reinforcing ribs 424 from both ends of the second lever body 420 in the second lever shaft extension direction 4210 in a direction intersecting the second lever shaft extension direction 4210, the rigidity (bending rigidity) of the second lever 42 can be further improved.

[0086] Furthermore, by forming the reinforcing rib 424 at a position that overlaps with the second lever regulating portion 423 when viewed in the second lever shaft extension direction 4210, the reinforcing rib 424 is formed in a portion where a large bending moment occurs, thereby efficiently suppressing bending of the second lever 42.

[0087] Next, when the worker inserts the electric wire W1 into the guide path 50 through the electric wire insertion hole 500 of the case 5, the electric wire W1 passes through the electric wire insertion opening 23 of the spring member 2 and enters the back of the guide path 50, as shown in Fig. 13. Then, the tip of the electric wire W1 presses the pushing portion 402, and the pushing portion 402 presses the first lever pushing portion 412 downward, causing the first lever 41 to rotate so that the portion of the second lever 42 closer to the first direction DR1 than the first lever shaft portion 411 moves downward. The second lever 42 is moved downward by the first lever 41 via the connecting member 43, and the stepped portion 423A disengages from the regulated portion 405 of the regulating member 40, allowing the regulated portion 405 to move in the first direction DR1.

[0088] 14, the adjustment member 3 moves in the second direction DR2 while pressing the restriction portion 401. The conductor pressing portion 202 of the pressure contact portion 22 of the spring member 2 presses the conductor W10 in the second direction DR2, and the conductor W10 is sandwiched between the conductor pressing portion 202 and the first terminal plate 1, and the electric wire W1 is fixed in a state in which it is electrically and mechanically connected to the first terminal plate 1, thereby preventing the electric wire W1 from coming loose.

[0089] By attaching a display such as a marker to the display unit 403, the angle of the first lever 41 can be determined from the position of the display, and the position of the first lever pressed portion 412, i.e., the position of the end of the electric wire W1 (conductor W10) that presses the first lever pressed portion 412 via the pressed portion 402, can be determined. This makes it possible to confirm that the electric wire W1 has been inserted to a predetermined length from the electric wire insertion hole 500.

[0090] The above steps complete the process of connecting the electric wire W1 to the terminal device B1.

[0091] Furthermore, the worker may stop the wiring work after performing the work until the second state is reached. In this case, since the wire insertion opening 23 of the spring member 2 is positioned in the guide path 50 in the second state, there is a risk that dust or foreign matter that has entered through the wire insertion hole 500 may penetrate deep into the guide path 50. For this reason, the worker needs to perform work to release the second state and return to the first state.

[0092] To release the second state to the first state, the operator can move the first lever 41 with a tool instead of moving the first lever 41 by pressing the pressed portion 402 with the electric wire W1. The operator can release the second state by inserting the tool through the opening 74 of the outer case 7 (see FIGS. 1 and 15) and the opening 505 of the case 5 (see FIG. 5) and moving a part of the first lever 41, such as the display unit 403 or a portion closer to the first direction DR1 than the first lever shaft 411. In other words, the part of the first lever 41, such as the display unit 403, that is operated by the tool inserted through the opening 74 of the outer case 7 and the opening 505 of the case 5 functions as a release part.

[0093] (2-3) Advantages of the terminal device according to the first embodiment As described above, in the terminal device B1, when the terminal device B1 is in the second state, the electric wire W1 is inserted through the electric wire insertion hole 500, and the electric wire W1 presses the pressed portion 402. This releases the restriction by the restricting portion 401 in the second state due to the action of the link mechanism 4 (see FIG. 13). As a result, the conductor pushing portion 202 moves in the second direction DR2 and pushes the conductor W10 in the second direction DR2 (see FIG. 14), thereby completing the wire connection. Therefore, the worker can complete the wire connection by simply inserting the electric wire W1 through the electric wire insertion hole 500 without requiring any other work. In the first embodiment, the worker does not need to handle both the tool and the electric wire W1, as in the conventional case, and the wire connection is easy to perform.

[0094] Furthermore, in the first embodiment, the second lever 42 has the second lever shaft 421 at its end on the second direction DR2 side and the groove 422 into which the other end of the connecting member 43 is inserted at its end on the first direction DR1 side, which makes it easier to ensure a long distance between the fulcrum and the point of effort. This makes it easier to reduce the force required to release the restriction by the restricting part 401 against the pushing force of the electric wire W1 into the pushed part 402, and makes it less likely that the restriction by the restricting part 401 will not be released even when the electric wire W1 is inserted.

[0095] In addition, since the display unit 403 indicates that the electric wire W1 has been inserted to a predetermined length from the electric wire insertion hole 500, it is unlikely that the wiring work will be completed before the electric wire W1 has been inserted to the predetermined length from the electric wire insertion hole 500.

[0096] Furthermore, since the second lever 42 has the reinforcing rib 424, it is possible to prevent the second lever 42 from bending and releasing the restriction on the movement of the restriction member 40.

[0097] (5) Details of the distribution board according to the embodiment A distribution board C1 according to the embodiment (hereinafter simply referred to as distribution board C1) includes a circuit breaker A1 used as a main breaker and a box C10 that houses the circuit breaker A1 (see FIG. 4). Note that although the distribution board C1 is illustrated as a residential board, it may be a distribution board other than a residential board, such as a cabinet-type distribution board used in offices, stores, factories, etc.

[0098] The box C10 is made of synthetic resin and has a rectangular box shape with an open front. The box C10 is not limited to being made of synthetic resin, but may also be made of metal. The box C10 is attached to an indoor construction material, for example, a wall in a house. Although not shown in the drawings, the front of the box C10 is closed by a door attached to the box C10 that can be opened and closed.

[0099] The circuit breaker A1 is housed in a position slightly to the left of the center in the left-right direction inside the box C10. Within the box C10, three bus bars and multiple branch breakers (branch switches) are housed in the space to the right of the circuit breaker A1.

[0100] The three busbars are each made of a rectangular conductive bar made of copper or copper alloy. The three busbars are arranged at equal intervals along the depth direction of the box C10, in the vertical center of the box C10. Each of the three busbars is electrically connected to one of the three secondary terminals A15 of the circuit breaker A1.

[0101] A plurality of branch breakers are arranged above and below the three busbars and are electrically connected to any two of the three busbars.

[0102] (summary) The above-described embodiments and the like disclose the following aspects.

[0103] The terminal device (B1) of the first aspect includes a terminal board (1), a spring member (2), an adjustment member (3), a link mechanism (4), and a case (5). The terminal board (1) is electrically connected to an electric circuit (A16) between the terminal board (1) and a secondary terminal (A15). The spring member (2) applies contact pressure to the conductor (W10) of the primary electric wire (W1) in a direction that brings the terminal board (1) into contact with the terminal board (1). The adjustment member (3) changes the amount of deformation of the spring member (2) by moving in the axial direction. The link mechanism (4) restricts and releases the axial movement of the adjustment member (3). The case (5) houses the terminal board (1), the spring member (2), the adjustment member (3), and the link mechanism (4). One of the axial directions is designated as a first direction (DR1), and the other direction is designated as a second direction (DR2).

[0104] The adjustment member (3) is movable between a first position in the axial direction and a second position that is closer to the first position in the first direction (DR1). The adjustment member (3) can press the spring member (2) in the first direction (DR1) and be pressed by the spring member (2) in the second direction (DR2). The spring member (2) has an adjustment member pressing portion (201) that presses the adjustment member (3) in the second direction (DR2) and a conductor pressing portion (202) that presses the conductor (W10) in the second direction (DR2). The adjustment member pressing portion (201) and the conductor pressing portion (202) are movable in the axial direction in unison. The case (5) has an electric wire insertion hole (500) into which the electric wire (W1) is inserted.

[0105] The link mechanism (4) includes a restricting member (40) having a restricting portion (401) and a pushing portion (402). The restricting portion (401) can restrict movement of the adjustment member (3) or the adjustment member pushing portion (201) in the second direction (DR2). The pushing portion (402) is pushed by the electric wire (W1) inserted through the electric wire insertion hole (500). The link mechanism (4) can change between a first state in which movement of the adjustment member (3) in the first direction (DR1) is not restricted when the adjustment member (3) is located in the first position, and a second state in which the restricting portion (401) restricts movement of the adjustment member (3) in the second direction (DR2) or the adjustment member pushing portion (201) that pushes the adjustment member (3) when located in the second position. When the pushing portion (402) is pushed and moved by the electric wire (W1) in the second state, the restriction by the restricting portion (401) in the second state is released, and the conductor pushing portion (202) moves in the second direction (DR2) and pushes the conductor (W10) in the second direction (DR2).

[0106] The link mechanism (4) has a first lever (41) pushed by the electric wire (W1), a second lever (42) that restricts the movement of the restricting portion (401), and a connecting member (43) that connects the first lever (41) and the second lever (42). The restricting portion (401) is formed on the restricting member (40). The first lever (41) has a first lever body (410), a first lever shaft (411) that is provided at an intermediate portion of the first lever body (410) and rotatably supported by the case (5), and a first lever pushed portion (412) that is provided at an end of the first lever body (410) on the first direction (DR1) side and pushed by the pushed portion (402). The second lever (42) has a second lever body (420), a second lever shaft (421) provided at the end of the second lever body (420) on the second direction (DR2) side and rotatably supported on the case (5), a second lever restricting portion (423) formed on the second lever body (420) and restricting movement of the restricting member (40), and a reinforcing rib (424) protruding from the second lever body (420). The restricting member (40) has a restricting member body (400), a restricting member shaft (404) provided at an intermediate portion of the restricting member body (400) and rotatably supported on the case (5), a restricting portion (401) provided at one end of the restricting member shaft (404), and a restricted portion (405) provided at the other end of the restricting member shaft (404) and restricted in movement by the second lever (42). One end of the connecting member (43) is connected to a portion of the first lever shaft (411) closer to the first direction (DR1). The other end of the connecting member (43) is connected to a portion of the second lever shaft (421) closer to the first direction (DR1). The reinforcing rib (424) extends from an end of the second lever body (420) in the second lever shaft extending direction (4210) in which the second lever shaft (421) extends, in a direction intersecting the second lever shaft extending direction (4210).

[0107] According to this aspect, from the second state, the worker inserts the electric wire (W1) through the electric wire insertion hole (500) and pushes the pushed portion (402) with the electric wire (W1), which releases the restriction by the restricting portion (401) through the action of the link mechanism (4), causing the conductor pushing portion (202) to move in the second direction (DR2) and push the conductor (W10) in the second direction (DR2), thereby completing the wiring. Therefore, the worker can complete the wiring simply by inserting the electric wire (W1) through the electric wire insertion hole (500), making the wiring work easy.

[0108] In addition, by providing a second lever shaft portion (421) at the end of the second lever (42) on the second direction (DR2) side and connecting a connecting member (43) to the part of the second lever (42) on the first direction (DR1) side, the distance between the fulcrum and the force point can be made longer.

[0109] In addition, it is possible to prevent the second lever (42) from bending and thereby preventing the restriction on the movement of the restricting member (40) from being released.

[0110] In the terminal device (B1) of the second embodiment, in the first embodiment, the reinforcing rib (424) extends from both ends of the second lever body (420) in the second lever shaft extension direction (4210) in a direction intersecting the second lever shaft extension direction (4210).

[0111] According to this embodiment, the rigidity (bending rigidity) of the second lever 42 can be further improved.

[0112] In the terminal device (B1) of the third aspect, in the first or second aspect, the reinforcing rib (424) is formed at a position overlapping with the second lever regulating portion (423) when viewed in the extension direction (4210) of the second lever shaft portion.

[0113] According to this embodiment, by forming the reinforcing rib 424 in a portion where a large bending moment occurs, bending of the second lever 42 can be efficiently suppressed.

[0114] In the terminal device (B1) of the fourth aspect, in any of the first to third aspects, the link mechanism (4) further has an indicator (403) that moves in conjunction with the movement of the pushing portion (402) and indicates that the electric wire (W1) has been inserted a predetermined length from the electric wire insertion hole (500).

[0115] According to this embodiment, it is unlikely that the wiring work will be completed before the predetermined length of the wire (W1) is inserted into the wire insertion hole (500).

[0116] A switch (D1) according to the fifth aspect includes a terminal device (B1) according to any one of the first to third aspects, a contact portion (A11) inserted into an electrical path (A16) between the terminal device (B1) and a secondary terminal (A15), and an opening / closing mechanism portion (A12) that opens and closes the contact portion (A11).

[0117] According to this embodiment, the worker can complete the wiring by simply inserting the electric wire (W1) through the electric wire insertion hole (500), which makes the wiring work easy.

[0118] A circuit breaker (A1) according to a sixth aspect includes the switch (D1) according to the fifth aspect and a tripping device (A14) that forcibly opens the contact portion (A11) via a switching mechanism portion (A12).

[0119] According to this embodiment, the worker can complete the wiring by simply inserting the electric wire (W1) through the electric wire insertion hole (500), which makes the wiring work easy.

[0120] A distribution board (C1) according to a seventh aspect includes the circuit breaker (A1) according to the sixth aspect and a box (C10) that houses the circuit breaker (A1).

[0121] According to this embodiment, the worker can complete the wiring by simply inserting the electric wire (W1) through the electric wire insertion hole (500), which makes the wiring work easy.

[0122] The configurations according to the second to fourth aspects are not essential for the terminal device (B1) and can be omitted as appropriate. [Explanation of symbols]

[0123] 1 1st terminal board (terminal board) 2 Spring member 201 Adjustment member pushing part 202 Conductor pushing part 3 Adjustment parts 4 Link mechanism 40 Regulatory member 400 Regulating member body 401 Regulatory Department 402 Pushed Section 403 Display section 404 Regulating member shaft 405 Regulated part 41 First Lever 410 First lever body 411 First lever shaft 412 First lever pressing part 42 Second Lever 420 Second lever body 421 Second lever shaft 423 Second lever regulation part 424 Reinforcing rib 43 Connecting member 5 cases 500 Wire insertion hole A1 Circuit Breaker A11 Contact part A12 Opening / closing mechanism A14 Tripping device A15 Secondary terminal A16 Electric circuit B1 terminal device C1 Distribution board C10 Box D1 switch DR1 1st direction DR2 Second direction W1 electric wire W10 conductor

Claims

1. a terminal board electrically connected to an electric path between the secondary terminal and the terminal; a spring member that applies a contact pressure to the conductor of the primary side electric wire in a direction that causes the conductor to contact the terminal plate; an adjustment member that changes the deformation amount of the spring member by moving in the axial direction; a link mechanism that restricts and releases the axial movement of the adjustment member; a case that accommodates the terminal board, the spring member, the adjustment member, and the link mechanism, one of the axial directions is a first direction and the other is a second direction; The adjustment member is The actuator is movable between a first position in the axial direction and a second position that is closer to the first orientation than the first position, a spring member that can push the spring member in the first direction and be pushed by the spring member in the second direction; The spring member is an adjustment member pushing portion that pushes the adjustment member in the second direction; a conductor pushing portion that pushes the conductor in the second direction, the adjustment member pushing portion and the conductor pushing portion are movable in the axial direction in conjunction with each other, the case has a wire insertion hole into which the wire is inserted, The link mechanism includes: a regulating member having a regulating portion capable of regulating movement of the adjustment member or the adjustment member pushing portion in the second direction; a pressing portion that is pressed by the electric wire inserted through the electric wire insertion hole, a state change is possible between a first state in which movement of the adjustment member located at the first position in the first direction is not restricted, and a second state in which the restriction portion restricts movement of the adjustment member located at the second position or the adjustment member pushing portion that pushes the adjustment member in the second direction, When the pushing portion is pushed and moved by the electric wire in the second state, the restriction by the restricting portion in the second state is released, and the conductor pushing portion moves in the second direction to push the conductor in the second direction, The link mechanism includes: a first lever that is pushed by the electric wire; a second lever that restricts the movement of the restricting portion; a connecting member that connects the first lever and the second lever, The first lever is A first lever body; a first lever shaft provided at an intermediate portion of the first lever body and rotatably supported by the case; a first lever pushing portion provided at an end of the first lever body on the first direction side and pushed by the pushing portion; The second lever is A second lever body; a second lever shaft provided at an end of the second lever body facing the second direction and rotatably supported by the case; a second lever restricting portion formed on the second lever body for restricting movement of the restricting member; a reinforcing rib protruding from the second lever body, The regulating member is A regulating member body, a restricting member shaft portion provided at an intermediate portion of the restricting member body and rotatably supported by the case; the restricting portion provided at one end of the restricting member body; a restricted portion provided at the other end of the restricting member body, the movement of which is restricted by the second lever, One end of the connecting member is connected to a portion of the first lever shaft that is closer to the first direction, the other end of the connecting member is connected to a portion of the second lever shaft that is closer to the first direction, The reinforcing rib extends from an end of the second lever body in a second lever shaft extension direction in which the second lever shaft extends, in a direction intersecting the second lever shaft extension direction. Terminal device.

2. The reinforcing ribs extend from both end portions of the second lever body in the extending direction of the second lever shaft in a direction intersecting the extending direction of the second lever shaft. The terminal device according to claim 1 .

3. The reinforcing rib is formed at a position overlapping the second lever restricting portion when viewed in the extending direction of the second lever shaft portion. The terminal device according to claim 1 .

4. The link mechanism further includes an indicator that moves in conjunction with the movement of the pushing portion and indicates that a predetermined length of the electric wire has been inserted into the electric wire insertion hole. The terminal device according to any one of claims 1 to 3.

5. A terminal device according to any one of claims 1 to 3; a contact portion inserted into an electrical path between the terminal device and a secondary terminal; an opening / closing mechanism that opens and closes the contact portion; Equipped with Switchgear.

6. The switch of claim 5; a tripping device that forcibly opens the contact portion via the opening / closing mechanism; Equipped with Circuit breaker.

7. The circuit breaker of claim 6; a box for accommodating the circuit breaker; Equipped with Distribution board.

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