Terminal block

Abstract

The present invention provides a terminal block capable of suppressing an increase in size of a housing. A terminal block (1) is provided with: a bus bar (3) having a through hole (31a); a nut (4) having a threaded hole (4h); a housing (2) having a holding part for holding the bus bar and a recessed part for holding the nut with the threaded hole and the through hole facing each other; and a bolt that is inserted into the through-hole and is screwed to a nut housed in the recess, the nut having a facing surface facing the bus bar and a protrusion (42) protruding from the facing surface to the bus bar, and the bus bar having a housing hole (33) that engages with the protrusion to restrict rotation of the nut.

Description

TECHNICAL FIELD

[0001] The present application relates to a terminal block. BACKGROUND

[0002] Conventionally, there is a technique of fastening two conductive members together using a nut and a bolt. A housing having a nut holding portion that holds a nut is disclosed in Patent Literature 1. A terminal portion of a conductor held by the housing is fastened together with a terminal of the opposite side by a bolt and a nut.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Laid-Open No. 2021-89881 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] When the bolt is screwed with the nut held by the housing, a torque of rotating the nut together with the bolt acts on the nut. For this torque, if the rotation of the nut is to be restricted by the housing, the wall thickness of the housing needs to be increased, resulting in a large size of the housing.

[0008] An object of the present application is to provide a terminal block capable of suppressing a large size of a housing.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] The terminal block of the present application is characterized by comprising: a bus bar having a through-hole; a nut having a threaded hole; a housing having: a holding portion that holds the bus bar; and a recess portion that holds the nut with the threaded hole and the through-hole facing each other; and a bolt that is inserted into the through-hole and screwed with the nut housed in the recess portion, the nut having an opposite surface facing the bus bar and a protrusion protruding from the opposite surface toward the bus bar, the bus bar having a housing hole that engages with the protrusion to restrict the rotation of the nut.

[0011] EFFECTS OF THE INVENTION

[0012] In the terminal block of the present application, the nut has an opposite surface facing the bus bar and a protrusion protruding from the opposite surface toward the bus bar, and the bus bar has a housing hole that engages with the protrusion to restrict the rotation of the nut. According to the terminal block of the present application, the rotation of the nut is restricted by the housing hole of the bus bar, thereby achieving an effect of suppressing a large size of the housing. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the terminal block of the embodiment.

[0014] Figure 2 is an exploded perspective view of a terminal block of an embodiment.

[0015] Figure 3 is a front view of a housing of an embodiment.

[0016] Figure 4 is a cross-sectional view of a housing of an embodiment.

[0017] Figure 5 is a plan view of a nut of an embodiment.

[0018] Figure 6 is a perspective view of a nut of an embodiment.

[0019] Figure 7 is a plan view of a busbar of an embodiment.

[0020] Figure 8 is a plan view of a busbar of an embodiment.

[0021] Figure 9 is a cross-sectional view of a terminal block of an embodiment.

[0022] Figure 10 is a cross-sectional view of a terminal block of an embodiment.

[0023] Figure 11 is a cross-sectional view of a terminal block of an embodiment.

[0024] Figure 12 is a cross-sectional view of a terminal block of an embodiment.

[0025] Figure 13 is a cross-sectional view of a terminal block of an embodiment.

[0026] Figure 14 is a cross-sectional view of a terminal block of an embodiment.

[0027] BRIEF DESCRIPTION OF REFERENCE NUMERALS

[0028] 1: terminal block

[0029] 2: housing; 2c: collar

[0030] 3: busbar; 3a, 3b: bent portion

[0031] 4: nut

[0032] 4a: front surface; 4b: back surface; 4h: threaded hole; 4x: central axis

[0033] 5: bolt

[0034] 6: seal

[0035] 7: retainer

[0036] 20: main body; 21: support wall

[0037] 22: through hole; 22a: housing portion; 22b: holding portion; 22c: opening portion

[0038] 23: recess; 23a: opposing surface; 23b: bottom surface,

[0039] 24: through hole

[0040] 31: first terminal portion; 31a: through hole; 32: second terminal portion; 32a: through hole

[0041] 33: housing hole; 33a: first housing hole; 33b: second housing hole

[0042] 40: main body; 41: side surface; 42: protrusion

[0043] 110: terminal

[0044] DL: diagonal line

[0045] Sq: square

[0046] X: first direction; Y: second direction; Z: third direction DETAILED DESCRIPTION

[0047] Hereinafter, a terminal block of an embodiment of the present application will be described in detail with reference to the drawings. In addition, the present application is not limited to this embodiment. In addition, the constituent elements in the following embodiment include elements that can be easily conceived by those skilled in the art or substantially the same elements.

[0048] [EMBODIMENT]

[0049] REFERENCE Figures 1 to 14 An embodiment will be described. This embodiment relates to a terminal block. Figure 1 is a perspective view of a terminal block of the embodiment, Figure 2 is an exploded perspective view of the terminal block of the embodiment, Figure 3 is a front view of a housing of the embodiment, Figure 4 is a sectional view of the housing of the embodiment, Figure 5 is a perspective view of a nut of the embodiment, Figure 6 is a perspective view of a nut of the embodiment, Figure 7 and Figure 8 is a perspective view of a bus bar of the embodiment, Figures 9 to 14 is a sectional view of the terminal block of the embodiment. Figure 4 shows Figure 3 IV-IV cross section. In Figure 12 XII-XII cross section of Figure 11 is shown in Figure 14 XII-XII cross section of Figure 12XIV-XIV cross section.

[0050] As Figure 1 shown in FIG. 1, a terminal block 1 of the embodiment has a housing 2 and three bus bars 3. The bus bars 3 electrically connect, for example, a first device and a second device. The two devices can be a motor and an inverter mounted on a vehicle. The housing 2 is fixed to a frame of the first device, for example. First terminal portions 31 of the bus bars 3 are connected to terminals 110 of the first device.

[0051] As Figure 2 shown in FIG. 1, the terminal block 1 has a nut 4 held by the housing 2 and a bolt 5 screwed with the nut 4. The bus bars 3 and the terminals 110 are fastened by the nut 4 and the bolt 5. The terminal block 1 of the embodiment is configured to be able to reduce a load on the housing 2 when the bolt 5 is screwed with the nut 4.

[0052] The bus bars 3 are formed of a metal plate having electrical conductivity. As Figure 2 shown in FIG. 1, each bus bar 3 has a first terminal portion 31 and a second terminal portion 32. The first terminal portion 31 is one end portion in a length direction of the bus bar 3. The second terminal portion 32 is the other end portion in the length direction of the bus bar 3. The first terminal portion 31 and the second terminal portion 32 each have a flat plate shape. A through hole 31a, 32a of a circular shape is provided in the first terminal portion 31 and the second terminal portion 32.

[0053] The bus bar 3 has bent portions 3a, 3b formed between the first terminal portion 31 and the second terminal portion 32. The bus bar 3 is bent at right angles at the two bent portions 3a, 3b, respectively. The two bent portions 3a, 3b are formed so that the two terminal portions 31, 32 protrude toward opposite directions from each other. The first terminal portion 31 is connected to the terminals 110 of the first device, and the second terminal portion 32 is connected to a terminal of the second device or the like.

[0054] The housing 2 is a member having a holding portion that holds the bus bar 3 and a recess 23 that holds the nut 4. The housing 2 is molded of synthetic resin having electrical insulation, for example. The housing 2 has a main body 20 and a support wall 21. The main body 20 is a portion fixed to the first device and has a substantially flat plate shape. Metal-made collars 2c are provided at both end portions of the main body 20. The housing 2 is fixed to the first device by the bolt inserted through the collars 2c.

[0055] The support wall 21 is provided upright toward the thickness direction of the main body 20. The plurality of bus bars 3 are inserted into the case 2 in a manner that penetrates the main body 20 and the support wall 21. The case 2 holds the plurality of bus bars 3 side by side. In this specification, the direction in which the bus bar 3 is inserted with respect to the case 2 is referred to as a first direction X, and the arrangement direction of the plurality of bus bars 3 in the case 2 is referred to as a second direction Y. In addition, the direction orthogonal to both the first direction X and the second direction Y is referred to as a third direction Z. The third direction Z is the thickness direction of the bus bar 3 held by the case 2. The bolt 5 is screwed with respect to the nut 4 held by the case 2 along the third direction Z.

[0056] As shown in FIG. 1, the support wall 21 protrudes from the main body 20 along the first direction X. The width direction of the support wall 21 is the second direction Y, and the thickness direction of the support wall 21 is the third direction Z. As shown in FIG. 2, the shape of the support wall 21 when viewed from the third direction Z is substantially rectangular. Figure 3 Figure 3 As shown in FIG. 3, three through holes 22 and three recesses 23 are provided in the support wall 21. The three through holes 22 and the three recesses 23 are arranged at intervals along the second direction Y. The three through holes 22 open at the recess 20a of the main body 20.

[0057] As shown in FIG. 4, the through hole 22 penetrates the case 2 along the first direction X. One end of the through hole 22 opens at the recess 20a of the main body 20. The recess 20a opens toward the side opposite to the support wall 21 side. The through hole 22 has a housing portion 22a and a holding portion 22b. The housing portion 22a is a portion that houses the seal 6 mounted to the bus bar 3. As shown in FIG. 5, the seal 6 is ring-shaped. The seal 6 is mounted to the bus bar 3. The seal 6 is mounted to the bus bar 3 so as to cover the end surface of the bus bar 3. Figure 3 As shown in FIG. 6, the holding member 7 and the ring-shaped seal 6 are mounted to the bus bar 3. A plurality of bus bars 3 are inserted into one holding member 7. The holding member 7 holds three bus bars 3 side by side.

[0058] Figure 4 The seal 6 is arranged between the first terminal portion 31 and the holding member 7. The bus bar unit including the bus bar 3, the holding member 7, and the seal 6 is inserted into the case 2 with the first terminal portion 31 as the front end. At this time, the holding member 7 houses the end surface of the seal 6 while supporting the same, and the seal 6 is inserted into the housing portion 22a of the recess 20a of the main body 20. The seal 6 seals the space between the wall surface of the housing portion 22a and the bus bar 3. Figure 2

[0059]

[0060] Figure 4 ​​​​The retaining portion 22b shown is the part that retains the busbar 3. Each busbar 3 is held by the retaining portion 22b of the corresponding through hole 22. The busbar 3 can also be pressed into the retaining portion 22b. The retaining portion 22b has, for example, ribs for retaining the busbar 3. In this case, the ribs protrude Z-directly from the inner wall of the retaining portion 22b towards a third direction. The ribs for retaining the busbar 3 can be crushing ribs.

[0061] like Figure 3 and Figure 4 As shown, the recess 23 is disposed at the end portion of the support wall 21 in the first direction X. In other words, the recess 23 is disposed at the end portion of the support wall 21 on the side away from the main body 20. The housing 2 of this embodiment has three recesses 23 arranged in the second direction Y. The recesses 23 open toward the third direction Z. When viewed from the third direction Z, the shape of the recesses 23 is rectangular, for example, square.

[0062] The recess 23 has four opposing surfaces 23a and a bottom surface 23b. The four opposing surfaces 23a form a rectangular frame for receiving the nut 4. Two of the four opposing surfaces 23a are opposed in a first direction X, and the other two are opposed in a second direction Y. The opposing surfaces 23a are opposed to the side surface 41 of the nut 4. The bottom surface 23b is connected to the opposing surfaces 23a and forms the bottom surface of the receiving chamber for receiving the nut 4. The support wall 21 has a plane 21a surrounding the recess 23.

[0063] A through hole 24 connected to the recess 23 is provided in the support wall 21. The through hole 24 opens at the bottom surface 23b of the recess 23 and penetrates the support wall 21 along the third direction Z. The cross-sectional shape of the through hole 24 in the plane orthogonal to the third direction Z is circular. The through hole 24 accommodates the end portion of the bolt 5.

[0064] like Figure 4 As shown, the through hole 22 has an opening 22c. The first terminal portion 31 of the busbar 3 protrudes from the opening 22c into the external space. The opening 22c is disposed adjacent to an opposing surface 23a of the recess 23. The first terminal portion 31 protruding from the opening 22c is opposed to the bottom surface 23b of the recess 23 in the third direction Z.

[0065] like Figure 5 and Figure 6 As shown, the nut 4 in this embodiment is rectangular in shape. The nut 4 has a body 40 and a protrusion 42 protruding from the body 40. A threaded hole 4h is formed in the body 40, penetrating the body 40.

[0066] The main body 40, when viewed from the direction of the central axis 4x of the threaded hole 4h, is square in shape. The four corners of the main body 40 are chamfered. The main body 40 has a front surface 4a and a back surface 4b. The front surface 4a is one of the two main surfaces of the main body 40. The front surface 4a faces the busbar 3 and the terminal 110 on the opposite side. The back surface 4b is the other of the two main surfaces of the main body 40. The back surface 4b faces the bottom surface 23b of the recess 23. The main body 40 has four side surfaces 41. The four side surfaces 41 face the opposite surface 23a of the recess 23.

[0067] The protrusion 42 protrudes from the front surface 4a of the body 40. The nut 4 of this embodiment has two protrusions 42. The two protrusions 42 are concentrically arranged with respect to the central axis 4x. That is, the two protrusions 42 are arranged on the same circumference centered on the central axis 4x. The protrusions 42 are positioned at a distance L1 from the central axis 4x. Distance L1 is a radial distance centered on the central axis 4x, and is the distance to the center of the protrusion 42.

[0068] In this embodiment, the protrusion 42 has a pointed shape whose cross-sectional area decreases with distance from the front surface 4a. The protrusion 42 illustrated is a frustum-cone shape. That is, the cross-sectional shape of the protrusion 42 in the plane parallel to the front surface 4a is circular. The cross-sectional area of ​​the protrusion 42 decreases with distance from the front surface 4a. Furthermore, the apex of the protrusion 42 is a plane parallel to the front surface 4a.

[0069] like Figure 7 As shown, a receiving hole 33 is formed on the first terminal portion 31 of the busbar 3, configured to engage with the protrusion 42. In this embodiment, the receiving hole 33 is a through hole penetrating the first terminal portion 31. The receiving hole 33 penetrates the first terminal portion 31 along its thickness direction. In this embodiment, the first terminal portion 31 has four receiving holes 33. The four receiving holes 33 are concentrically arranged with the central axis 31x of the through hole 31a as the center. That is, the four receiving holes 33 are arranged on the same circumference centered on the central axis 31x.

[0070] The receiving hole 33 is positioned at a distance L2 from the central axis 31x. Distance L2 is the radial distance centered on the central axis 31x, and is the distance to the center 33x of the receiving hole 33. The value of distance L2 is equal to the value of distance L1 of the nut 4.

[0071] The shape of the receiving hole 33 in this embodiment is such that it can accommodate the entire protrusion 42. The illustrated receiving hole 33 is cylindrical. That is, the shape of the receiving hole 33 in the plane orthogonal to the central axis 31x is circular. The cross-sectional area of ​​the receiving hole 33 is greater than or equal to the cross-sectional area of ​​the protrusion 42. The inner diameter of the receiving hole 33 is greater than or equal to the maximum outer diameter of the protrusion 42.

[0072] The four receiving holes 33 are configured such that one of the four receiving holes 33 can engage with any one of the protrusions 42. That is, the first terminal portion 31 can make any receiving hole 33 engage with any one of the protrusions 42 of the nut 4.

[0073] In the terminal block 1 of this embodiment, when the through hole 31a of the first terminal portion 31 is aligned with the threaded hole 4h of the nut 4, two of the four receiving holes 33 of the first terminal portion 31 can engage with the corresponding two protrusions 42. Hereinafter, an example of the configuration of the protrusions 42 and receiving holes 33 in this embodiment will be described.

[0074] like Figure 5 As shown, the nut 4 has a diagonal DL. The diagonal DL is a straight line connecting the opposite corner of the main body 40. That is, the diagonal DL is the diagonal of the rectangle of the nut 4. The diagonal DL intersects the central axis 4x. The protrusion 42 is disposed on the diagonal DL. When the protrusion 42 is disposed on the diagonal DL, the distance L1 from the central axis 4x to the protrusion 42 can be increased.

[0075] Two protrusions 42 are disposed on the diagonal DL, separated by a threaded hole 4h. That is, one protrusion 42 is disposed on one side of the diagonal DL relative to the threaded hole 4h, and the other protrusion 42 is disposed on the other side of the diagonal DL relative to the threaded hole 4h.

[0076] like Figure 8 As shown, the four receiving holes 33 have a pair of first receiving holes 33a and a pair of second receiving holes 33b. The four receiving holes 33 are arranged at the vertices of a square Sq centered on the central axis 31x. The pair of first receiving holes 33a are arranged at one set of opposite corners of the square Sq, and the pair of second receiving holes 33b are arranged at the other set of opposite corners.

[0077] When the busbar 3 and the nut 4 are assembled to the case 2, one pair of the first accommodation holes 33a or one pair of the second accommodation holes 33b opposes the two protrusions 42 of the nut 4. In a case where the first accommodation holes 33a oppose the protrusions 42, one first accommodation hole 33a engages with one protrusion 42, and the other first accommodation hole 33a engages with the other protrusion 42. In a case where the second accommodation holes 33b oppose the protrusions 42, one second accommodation hole 33b engages with one protrusion 42, and the other second accommodation hole 33b engages with the other protrusion 42. Thus, the four accommodation holes 33 are configured in a manner that one of the four accommodation holes 33 can engage with any protrusion 42 of the nut 4.

[0078] In Figure 9 the nut 4 accommodated in the recess 23 is shown. The nut 4 is inserted into the recess 23 in a posture in which the back surface 4b faces the bottom surface 23b of the recess 23. The recess 23 is configured to be able to accommodate the entirety of the main body 40 inside the recess 23. The protrusions 42 protrude from the recess 23 toward the third direction Z. That is, the protrusions 42 protrude toward the side opposite to the side of the recess 23 with respect to the plane 21a that surrounds the recess 23.

[0079] The opposing surface 23a of the recess 23 opposes the side surface 41 of the nut 4, and the nut 4 is positioned. The recess 23 holds the nut 4 in a manner that the two side surfaces 41 of the nut 4 are parallel to the first direction X and the other two side surfaces 41 are parallel to the second direction Y.

[0080] Figure 10 The busbar 3 assembled to the case 2 is shown. The first terminal portion 31 of the busbar 3 protrudes from the opening portion 22c along the first direction X. The first terminal portion 31 advances along the plane 21a of the case 2 and the front surface 4a of the nut 4. At this time, the first terminal portion 31 advances to a prescribed position while passing over the protrusions 42 of the nut 4. A chamfered portion 31b in a circular arc shape that is able to pass over the protrusions 42 is formed at the tip end of the first terminal portion 31.

[0081] Figure 11 and Figure 12 The busbar 3 positioned at the prescribed position is shown. The through-hole 31a of the first terminal portion 31 opposes the threaded hole 4h of the nut 4 in the third direction Z. The terminal stand 1 is designed to make the center axis 4x of the threaded hole 4h coincide with the center axis 31x of the through-hole 31a in a case where the busbar 3 is positioned at the prescribed position.

[0082] As Figure 12 shown, the protrusions 42 of the nut 4 oppose the accommodation holes 33 of the busbar 3 in a case where the busbar 3 is positioned at the prescribed position. At least a portion of the protrusions 42 is inserted into the accommodation holes 33. In Figure 12In the middle, the protrusion 42 is housed in each of the pair of first housing holes 33a. Further, the nut 4 can also be disposed in such a manner that the protrusion 42 opposes the second housing hole 33b.

[0083] In Figure 13 A terminal block 1 fixed to a housing 120 of a first device 100 is shown in the middle. The main body 20 of the housing 2 and the housing 120 are sealed by a ring-shaped face seal 2p. The first terminal portion 31 is housed in the internal space of the housing 120. The terminal 110 of the first device 100 is disposed in a position opposing the first terminal portion 31 and the nut 4. The through hole 110a of the terminal 110 opposes the through hole 31a and the threaded hole 4h in the third direction Z. The bolt 5 is inserted through the two through holes 110a, 31a and is screwed into the threaded hole 4h of the nut 4.

[0084] Figure 14 is Figure 12 A cross section of the terminal block 1 at the XIV-XIV position of FIG. 12 is shown in the middle. In Figure 14 A cross section when the bolt 5 is screwed into the nut 4 is shown in the middle. As Figure 14 indicated in the middle, the protrusion 42 of the nut 4 engages with the housing hole 33 of the bus bar 3, restricting the relative rotation of the nut 4 with respect to the bus bar 3.

[0085] Due to the torque when the bolt 5 is screwed into the nut 4, a force Fl acts on the nut 4. The force Fl is a force pressing the nut 4 toward the bus bar 3. That is, the force Fl is a force pressing the front surface 4a of the nut 4 toward the first terminal portion 31, pressing the protrusion 42 into the housing hole 33. Therefore, when the bolt 5 is screwed into the nut 4, the nut 4 is pulled up from the bottom surface 23b of the recess 23 toward the first terminal portion 31. As the nut 4 approaches the first terminal portion 31, the range in which the nut 4 can rotate with respect to the first terminal portion 31 narrows. In the case where the front surface 4a of the nut 4 is in close contact with the first terminal portion 31, the range in which the nut 4 can rotate is the narrowest. When the front surface 4a comes into contact with the first terminal portion 31, the co-rotation of the nut 4 is restricted by both the frictional force between the front surface 4a and the first terminal portion 31 and the force with which the protrusion 42 is caught by the housing hole 33.

[0086] Thus, in the terminal block 1 of the present embodiment, the co-rotation of the nut 4 when the first terminal portion 31 and the terminal 110 are fastened by the bolt 5 and the nut 4 is appropriately restricted. The co-rotation of the nut 4 is restricted by the protrusion 42, thereby reducing the load on the housing 2 when the bolt 5 is screwed into the nut 4. Since the load on the housing 2 is reduced, the wall thickness of the housing can be made thinner, allowing the housing 2 to be downsized.

[0087] As explained above, the terminal block 1 of the present embodiment has the bus bar 3 having the through-hole 31a, the nut 4 having the threaded hole 4h, the housing 2, and the bolt 5. The housing 2 has the holding portion 22b that holds the bus bar 3 and the recessed portion 23 that holds the nut 4 with the threaded hole 4h and the through-hole 31a being opposed to each other. The bolt 5 is inserted into the through-hole 31a and is screwed with the nut 4 housed in the recessed portion 23. The nut 4 has the front surface 4a and the protrusion 42 protruding from the front surface 4a. The front surface 4a is an opposed surface opposed to the bus bar 3. The protrusion 42 protrudes from the front surface 4a toward the bus bar 3. The bus bar 3 has the housing hole 33 that engages with the protrusion 42 to restrict the rotation of the nut 4. In the terminal block 1 of the present embodiment, by restricting the relative rotation of the nut 4 with respect to the bus bar 3, the load on the housing 2 at the time when the bolt 5 is screwed with the nut 4 is reduced.

[0088] In the present embodiment, the shape of the nut 4 when viewed from the direction of the center axis 4x of the threaded hole 4h is a rectangle. The protrusions 42 are arranged on the diagonal line DL of the rectangle. By such an arrangement, by increasing the distance L1 from the center axis 4x to the protrusion 42, it is possible to improve the effect of restricting the co-rotation.

[0089] The nut 4 of the present embodiment has two protrusions 42 arranged on the diagonal line DL across the threaded hole 4h. By arranging the protrusions 42 on both sides of the diagonal line DL with respect to the threaded hole 4h, it is possible to improve the effect of restricting the co-rotation of the nut 4.

[0090] The recessed portion 23 of the present embodiment holds the nut 4 at the position at which the protrusion 42 and the housing hole 33 are opposed to each other. By such a structure, it is possible to more reliably exert the effect of restricting the co-rotation of the nut 4 by the protrusion 42 and the housing hole 33.

[0091] The nut 4 of the present embodiment has a plurality of protrusions 42. The plurality of protrusions 42 are concentrically arranged with the center axis 4x of the threaded hole 4h as the center. The bus bar 3 has a plurality of housing holes 33. The plurality of housing holes 33 are arranged so that one of the plurality of housing holes 33 can engage with any of the protrusions 42. By the plurality of protrusions 42 engaging with the plurality of housing holes 33, it is possible to effectively restrict the co-rotation of the nut 4.

[0092] In addition, the number of the protrusions 42 that the nut 4 has is not limited to the two exemplified. For example, the nut 4 can also have four protrusions 42. In this case, the four protrusions 42 can also be arranged at the vertices of a square with the center axis 4x as the center. The nut 4 can also have three protrusions 42. In this case, the three protrusions 42 can also be arranged at the vertices of a square with the center axis 4x as the center.

[0093] The number of the accommodation holes 33 of the bus bar 3 is not limited to the four illustrated. The number of the accommodation holes 33 of the first terminal portion 31 can be the same as the number of the protrusions 42 of the nut 4, or can be more than the number of the protrusions 42. That is, the number of the accommodation holes 33 of the first terminal portion 31 is set to be able to engage the accommodation holes 33 with all of the protrusions 42.

[0094] The accommodation holes 33 of the bus bar 3 can also not penetrate the first terminal portion 31. For example, the accommodation holes 33 can also be recesses formed in the first terminal portion 31.

[0095] The shape of the nut 4 when viewed from the direction of the center axis 4x can also be a shape other than a rectangular shape. For example, the shape of the nut 4 can also be a polygonal shape other than a rectangular shape.

[0096] The contents disclosed in the above-described embodiments can be appropriately combined and executed.

Claims

1. A terminal block, characterized in that, have: A busbar having a through hole; Nut, the nut having a threaded hole; Housing, the housing having: a retaining portion that retains the manifold; and a recess that aligns the threaded hole with the through hole to retain the nut; and A bolt, which is inserted into the through hole and screwed into the nut received in the recess. The nut has: an opposing surface, which is opposite to the busbar; and protrusions, the protrusions protruding from the opposing surface toward the busbar, The manifold has a receiving hole that engages with the protrusion to restrict the rotation of the nut.

2. The terminal block according to claim 1, characterized in that, The nut is rectangular when viewed from the direction of the central axis of the threaded hole. The protrusions are positioned on the diagonal of the rectangle.

3. The terminal block according to claim 2, characterized in that, The nut has two protrusions, which are arranged diagonally across the threaded hole.

4. The terminal block according to claim 1, characterized in that, The recess holds the nut in a position where the protrusion is opposite the receiving hole.

5. The terminal block according to claim 1, characterized in that, The nut has a plurality of the aforementioned protrusions. The plurality of protrusions are concentrically arranged with respect to the central axis of the threaded hole. The busbar has multiple receiving holes. The plurality of receiving holes are configured such that one of the receiving holes can engage with any of the protrusions.

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