JP6632366B2 - Terminal block - Google Patents

Description

  The present invention relates to a terminal block, and more particularly to a terminal block screw receiving structure for mounting a printed circuit board.

  In the conventional terminal block, a metal terminal portion which is a screw receiving portion of the terminal block for connecting the output supply cable, and a power supply lead terminal and a voltage detection lead terminal which are pins for mounting on a printed circuit board are: The pins are integrated, and the pins are fixed to the printed circuit board by soldering. The voltage of the output supply cable is supplied to a power supply pattern and a voltage detection pattern which are wiring patterns of a printed circuit board via a terminal block.

  In a conventional terminal block, for example, as described in Patent Document 1, an output supply cable is fastened to a metal terminal portion with a screw. In addition, the metal terminal portion to which the screw is fastened also serves as a printed circuit board insertion pin, and the metal terminal portion is directly fixed to the printed circuit board as a power supply lead terminal by soldering, and the power is supplied to the power supply pattern. Supply structure. Also in the voltage detecting section, it is fixed to the metal terminal portion and also serves as a voltage detecting lead terminal, and is directly fixed to the voltage detecting pattern by soldering.

Japanese Utility Model Laid-Open No. 5-55466

  In the configuration of Patent Literature 1, when an output supply cable that supplies a voltage of a power supply line is fastened to a metal terminal portion of a terminal block with a screw, stress at the time of screw fastening causes power supply lead terminals connected to a printed circuit board and The structure is such that it is applied to the solder joint of the voltage detection lead terminal. Therefore, the stress at the time of screw fastening is applied to the solder joint of each lead terminal connected to the printed circuit board, and the stress due to the stress on the solder joint increases, and the reliability of the soldered part decreases. Was.

  The present invention has been made in view of the above, and a stress generated when a cable such as an output supply cable for supplying a voltage of a power supply line is fastened to a screw terminal receiving portion of a terminal block by a screw is provided on a wiring board. It is an object of the present invention to provide a terminal block capable of reducing the voltage applied to a solder joint of a pin connected to the terminal block.

In order to solve the above-described problems and achieve the object, the present invention provides a terminal having a primary terminal fastening portion to which a primary wire is connected, and a secondary terminal fastening portion to which a secondary wire is connected. The base body, a conductive plate attached to the terminal block body and connecting the primary terminal fastening portion and the secondary terminal fastening portion, and a wiring board connected to the primary terminal fastening portion or the secondary terminal fastening portion. It is a terminal block provided. The connection part between the wiring board and the primary terminal fastening part or the secondary terminal fastening part is provided with a metal plate soldered to the wiring board and a contact contacting the metal plate with the primary terminal fastening part or the secondary terminal. and a pivotable movable plate which is fastened to the side terminal connection part, that the movable plate is rotated, contacts abut the metal plate, the connecting portion is connected.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to relieve the stress which arises when a cable is fastened to the screw terminal receiving part of a terminal block with a screw from being applied to the solder joint part of the pin connected to a wiring board. Provide a terminal block.

Explanatory drawing showing the external configuration of the terminal block of the first embodiment. Sectional drawing which shows the internal structure before the movable plate screw of the terminal block of Embodiment 1 is fastened. Sectional drawing which shows the internal structure when the movable plate screw of the terminal block of Embodiment 1 is fastened. FIG. 2 is a perspective view showing the appearance of the terminal block according to the first embodiment. Enlarged sectional view of a main part of the terminal block according to the first embodiment before fastening a movable plate screw. Principal part enlarged sectional view of the terminal block according to the first embodiment when the movable plate screw is fastened. Principal part enlarged perspective view of the movable plate of the terminal block according to the first embodiment. It is an important section enlarged view of a movable plate of a terminal block of Embodiment 1, (a) is a side view, (b) is a front view. Principal part enlarged perspective view of the movable plate of the terminal block according to the second embodiment. It is a principal part enlarged view of the movable plate of the terminal block of Embodiment 2, (a) is a side view, (b) is a front view. Sectional drawing which shows the internal structure when the movable plate screw of the terminal block of Embodiment 3 is fastened. Sectional drawing which shows the internal structure before the movable plate screw of the terminal block of Embodiment 4 is fastened. Sectional drawing which shows the internal structure when the movable plate screw of the terminal block of Embodiment 4 is fastened. Main part enlarged perspective view of the movable plate of the terminal block according to the fourth embodiment. It is the principal part enlarged view of the movable plate of the terminal block of Embodiment 4, (a) is a side view, (b) is a front view.

  Hereinafter, embodiments of a terminal block according to the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited by the embodiment, and can be appropriately changed without departing from the gist of the present invention. Further, in the drawings described below, the scale of each member may be different from the actual scale for easy understanding. The same applies to each drawing.

Embodiment 1 FIG.
FIG. 1 is an explanatory diagram illustrating an external configuration of the terminal block according to the first embodiment. 2 and 3 are cross-sectional views showing the internal configuration of the terminal block according to the first embodiment. FIG. 2 shows a state before the movable plate screw is fastened, and FIG. 3 shows a state after the movable plate screw is fastened. FIG. 4 is a diagram showing the appearance of the terminal block. The terminal block according to the first embodiment has a first connection portion 3 which is a primary terminal connection portion and a second connection portion which is a secondary terminal connection portion, which is connected to a resin terminal block main body 1 using screws 2. The connection part 4 is provided. A printed board 10 as a wiring board is mounted on the terminal block of the first embodiment. The second connection part 4 includes a metal plate 7 soldered to the printed circuit board 10 and a contact 12 that contacts the metal plate 7, and is movable to fasten the output supply cable 5 b to the conductive plate 15 with the screw 2. And a plate 6. The contact between the contact 12 provided on the movable plate 6 and the metal plate 7 achieves the connection of the second connection portion 4 to the printed circuit board 10. On the other hand, the first connection part 3 achieves the connection between the power cable 5 a and the conductive plate 15 of the terminal block with the screw 2. When the first connection portion 3 and the second connection portion 4 achieve the connection, the voltage from the power supply cable 5a connected to the power supply line is applied to the output supply connected to the load via the conductive plate 15. It is transmitted to the cable 5b.

  In the terminal block according to the first embodiment, as shown in FIGS. 2 and 3, the first connection portion 3 includes a metal terminal portion 5f which is a crimp terminal at the end of a power supply cable 5a connected to a power supply line, and a conductive terminal 5f. The plate 15 is connected with the screw 2. That is, the power cable 5 a is fastened to the conductive plate 15, which is a screw terminal receiving portion, with the screw 2.

  On the other hand, the second connection portion 4 includes a metal terminal portion 5f in which the output supply cable 5b for supplying the voltage of the power supply line is fastened to the conductive plate 15 forming the screw terminal receiving portion with the screw 2, and the printed circuit board 10 The movable plate 6 is joined to a lead terminal 7R, which is a printed circuit board insertion pin for connection to the terminal. That is, the output supply cable 5b can be fixed together with the upper surface 6a of the movable plate 6 to the conductive plate 15 as the screw terminal receiving portion by the screw 2. The movable plate 6 is formed of a metal plate having an L-shaped cross section and having a leaf spring function. The upper surface portion 6a of the movable plate 6 has a mounting hole 6h through which the screw 2 can be inserted, and is bent at a right angle by the side surface portion 6b and the rotation fulcrum shaft 8. The lead terminal 7R is connected to the pad portion 17P of the wiring pattern 17 provided on the printed board 10 by the solder layer 11. Further, a contact 12 is provided on the outer side surface of the side surface portion 6b. The contact 12 serving as a contact portion has a semicircular cross section so that the contact portion between the movable plate 6 and the metal plate 7 having the lead terminal 7R connected to the printed board 10 is securely contacted.

  FIG. 2 shows an internal configuration diagram of the terminal block main body 1 before screwing to the movable plate 6 according to the first embodiment. The state where the output supply cable 5b and the upper surface portion 6a of the movable plate 6 are fastened by the screw 2 is shown. The movable plate 6 is supported by a rotation fulcrum shaft 8 near the boundary between the upper surface portion 6a and the side surface portion 6b, and has a structure capable of rotating along the rotation fulcrum shaft 8.

The movable range angle toward the inside of the terminal block main body 1 is the difference between the movable range angle α ₁ of the movable plate 6 and the angle of the corner of the conductive plate 15 constituting the screw terminal receiving portion, α ₁ −α _0. Met. That is, as shown in FIG. 2, the difference between the angle α ₁ formed by the upper surface 6 a and the side surface 6 b of the movable plate 6 and the angle α ₀ of the corner of the conductive plate 15 is the movable range of the movable plate 6. . The angle between the upper surface 6a and the side surface 6b of the movable plate 6 is limited within the range of α ₁ -α ₀ as shown in FIG. Accordingly, the floating of the upper surface portion 6 and the side surface portion 6b of the movable plate 6 from the conductive plate 15 while the movable range is restricted has a structure in which the fastening with the screw 2 can be easily performed.

  The output supply cable 5b and the upper surface 6a of the movable plate 6 are fastened to the conductive plate 15 with the screw 2. At this time, as shown in FIG. 3, the upper surface portion 6a of the movable plate 6 comes into contact with the fixed metal plate 7 having the lead terminal 7R, which is a pin for inserting a printed circuit board, at the contact point 12 so that electricity can be supplied. , Electrical connection is achieved.

  In addition, the contact 12 of the side surface portion 6b of the movable plate 6 has a semicircular cross-sectional shape, and when the upper surface portion 6a of the movable plate 6 is fastened to the conductive plate 15 with the screw 2, it is displaced. Also have a structure that surely contacts the metal plate 7.

  The metal plate 7 having the lead terminals 7R for inserting the printed circuit board is held in a concave portion 9 provided in the terminal base body 1 made of insulating plastic, and the lead terminals 7R are inserted into the printed circuit board 10. They are joined by a solder layer 11.

  The output supply cable 5b that supplies the voltage of the power supply line is fastened to the conductive plate 15 together with the upper surface portion 6a of the movable plate 6, but is different from the metal plate 7 having the lead terminals 7R that are the pins for inserting the printed circuit board. The structure is such that a contact is made at a contact point 12 having a semicircular cross section. Therefore, the stress generated when the screw 2 is fastened is not applied directly to the metal plate 7 but is applied via the contact 12. Therefore, it is possible to avoid that the stress generated when the screw 2 is fastened is directly applied to the solder layer 11, and the strength of the connection portion is improved, and the reliability is improved.

  As shown in FIG. 4, the terminal block of the first embodiment uses a terminal block main body 1 made of a resin molded body made of a heat-resistant resin such as a polycarbonate resin and having an insulating wall 1a and an insulating partition 1b at the center. Can be

  5 and 6 are enlarged explanatory views of a main part showing a fastening structure of a terminal fastening part in the terminal block according to the first embodiment. FIG. 5 shows a bolt and a nut, that is, a male screw, which constitute the fastening structure of the terminal fastening part. FIG. 6 is a diagram showing a female screw, and FIG. 6 is an explanatory diagram showing a fastening state. In the terminal block of the first embodiment, washer 2W is inserted through screw 2 for fastening metal terminal portion 5f formed at the tip of first connection portion 3 and second connection portion 4 to conductive plate 15. To conclude. The screw 2 includes a screw head 2a and a screw main body 2b, and a screw thread 2N is formed in the screw main body 2b.

Each of the first connection portion 3 and the second connection portion 4 that are terminal fastening portions includes a nut 15 </ b> N formed on a conductive plate 15 disposed in a concave portion of the terminal block main body 1 and a bolt forming the screw 2. Is concluded. A thread groove 15N ₀ formed in the screw hole of the nut 15N, against the screw groove 15N _0, together with the washers 2W is screwed a threaded 2N formed on the outer surface of the inserted through bolt body part 2b, By sandwiching the conductor to be connected, terminal connection is realized as shown in FIG. Here, the conductor to be connected is the metal terminal 5f, and the metal terminal 5f is connected to the conductive plate 15. As a result, the power cable 5a is connected to the output supply cable 5b.

  With this configuration, when the output supply cable 5b that supplies the voltage of the power supply line is fixed to the terminal block main body 1 with the screws 2, the stress on the lead terminals 7R connected to the printed circuit board 10 is reduced, and It has a function of improving the reliability of the solder layer 11 constituting the joint.

  That is, in the first embodiment, the object to be fixed by the screw 2 is not the direct lead terminal 7R, but an L-shaped body having a leaf spring function, that is, a movable member formed of a metal plate having an L-shaped cross section. The plate 6 is used. Then, the contact 12 of the movable plate 6 is brought into contact with the metal plate 7 having the lead terminal 7R connected to the printed board 10, thereby realizing the electrical connection between the output supply cable 5b and the printed board 10. . With the above configuration, the stress generated when the output supply cable 5b that supplies the voltage of the power supply line is fastened to the second connection portion 4 that forms the screw terminal receiving portion of the terminal block with the screw 2 Can be reduced to the solder layer 11 constituting the solder joint of the lead terminal 7R connected to the printed circuit board 10.

  Also, as shown in FIGS. 1 to 3, the contact surface of the terminal block main body 1 with the printed board 10 is provided with the printed circuit board 10 so that the terminal block main body 1 can be positioned and fixed when the printed board 10 is mounted. Bosses 14 that can be inserted at four corners are provided. Further, on both sides of the terminal block main body 1, terminal block screw fixing portions 13 for firmly fixing the terminal block main body 1 to the printed circuit board 10 are provided on the A side and the B side. Although the screw fixing portion 13 can be seen only on the A side in FIG. 1, it is also provided on the B side. Since the terminal block main body 1 has a shape that can be fixed with the screw 2, the terminal block main body 1 can be securely fixed to the printed circuit board 10.

  The connecting portions 3 and 4 for connecting the power supply cable 5a, the output supply cable 5b, and other cables to the screw 2 and the screw terminal receiving portion are made of electrically connectable metal. The insulating partition 1b for preventing the contact portion between the output supply cable 5b and the screw 2 and the first and second connection portions 3 and 4 of the terminal block body 1 to be fixed from contacting the adjacent conductive portion. Is provided.

  The terminal block main body 1 is fixed to a printed board 10 by a boss 14 for fixing the printed board, and a metal plate 7 having lead terminals 7R constituting pins for insertion into the printed board 10 is connected to the printed board 10 by a solder layer. At 11, it is joined to the wiring pattern 17 of the printed circuit board 10 by the solder layer 11.

  The structure of the movable plate 6 is shown in FIGS. 7 and 8A and 8B. The movable plate 6 shown in FIG. 7 is formed of a leaf spring-shaped metal thin plate having elasticity. FIG. 8A shows a side view of the movable plate 6, and FIG. 8B shows a front view. The rotation fulcrum shaft 8 is passed through and supported by a rotation fulcrum shaft support 19 formed by a cut and raised piece formed by cutting and raising a rotation fulcrum shaft support cut 20 of the movable plate 6. The movable plate 6 is rotatably supported with respect to the rotation fulcrum shaft 8 by a rotation fulcrum shaft support 19, and the movable plate 6 is configured to be movable about the rotation fulcrum shaft 8 as a fulcrum. The rotation fulcrum shaft 8 is press-fitted and fixed at both ends to an insulating resin constituting the terminal block main body 1. Since the movable plate 6 is made of a thin metal plate having elasticity, when the output supply cable is fixed to the conductive plate 15 which is a screw terminal receiving portion with the screw 2, the movable plate 6 connects the rotating fulcrum shaft 8. By bending as a fulcrum, the contact 12 comes into contact with the metal plate 7 having the lead terminals 7R constituting the pins for inserting the printed circuit board.

As described above, in the first embodiment, the metal terminal portion 5f fastened to the power supply cable 5a and the output supply cable 5b of the terminal block main body 1 with the screw 2 and the printed circuit board 10 are soldered. The fixed lead terminals 7R are separated without being integrated. Then, the fixed plate of the movable plate 6 constituted by rotatable metal leaf spring, with a lead terminal 7R fixed by soldering to the printed circuit board 10 which is fastened to the hand Metals terminal portion 5f to the screw 2 To the metal plate 7 at the contact point 12.

  With such a configuration, the load stress applied to the lead terminals 7R fixed to the printed circuit board 10 by soldering due to the stress generated when the output terminal cables 5b are fastened to the metal terminal portions 5f by the screws 2 is reduced. Therefore, the reliability of the solder joint can be improved.

  As described above, in the terminal block according to the first embodiment, when the voltage of the power supply line is supplied to the printed circuit board via the terminal block, the stress applied to the solder surface of the printed circuit board due to screw fastening is reduced, and The reliability of the joint can be improved.

  Further, in the terminal block according to the first embodiment, the terminal block main body 1 has bosses 14 that can be fixed to the printed board 10 at each corner of the terminal, thereby preventing the mounting position of the printed board 10 from shifting. Further, screw fixing portions 13 are provided on both sides of the terminal block main body 1 so that the terminal block main body 1 can be firmly fixed to the printed circuit board 10, thereby preventing the terminal block from being displaced into the printed circuit board 10. It has a structure. Therefore, more secure fixing becomes possible.

  In the first embodiment, the screw terminal receiving portion has a structure in which the two cables are fixed to the same conductive plate 15 so that the power supply cable 5a and the output supply cable 5b are electrically connected. A structure in which one conductive plate is connected to one cable, or the primary of one conductive plate is electrically connected to one cable on the primary terminal side and a plurality of output supply cables on the secondary terminal side The terminal side or the secondary terminal side may have a structure having a terminal receiving portion to which a plurality of cables such as output supply cables can be fixed.

  In the first embodiment, the metal plate having the printed circuit board insertion pins for supplying the voltage of the power supply line to the printed circuit board is disposed only on one side which is the secondary terminal side. It is good also as a structure arrange | positioned with both movable plates of the side.

  The terminal block is used in a control panel, a switchboard, or a power conditioner device for connection, relaying, or branching to a cable connected to a power supply such as AC 100 V or 200 V. When a large current flows through the terminal block, Mainly screw type is adopted. A board terminal block for directly connecting a power supply line to a printed board via the terminal block is also prepared. However, in the case of a terminal block having a structure in which the power supply line is directly connected to the printed board via the terminal block, the pins connected to the printed board are often integrated with the screw receiving portion of the terminal board. Therefore, when the metal terminal portion, which is a crimp terminal, is fixed to the conductive plate constituting the screw receiving portion of the terminal block with a screw, stress is applied to the solder joint of the printed circuit board 10 and the reliability of the solder joint decreases. However, in the first embodiment, there is no such a concern, and the reliability of the solder joint can be improved.

Embodiment 2 FIG.
Hereinafter, Embodiment 2 will be described in detail with reference to the drawings. The second embodiment shows a modification of the movable plate, and the configuration other than the movable plate is formed in the same manner as the first embodiment.

  The structure of the movable plate 26 is shown in FIGS. 9, 10A and 10B. The movable plate 26 shown in FIG. 9 is formed of a corrugated metal sheet having elasticity. FIG. 10A is a side view of the movable plate, and FIG. 10B is a front view of the movable plate. The rotation fulcrum shaft 8 is passed through and supported by a rotation fulcrum shaft support 19 formed by a cut and raised piece formed by cutting and raising a rotation fulcrum shaft support cut 20 of the movable plate 6. The movable plate 26 is rotatably supported by the rotation fulcrum shaft support 19 with respect to the rotation fulcrum shaft 8, and the movable plate 26 is configured to be able to rotate about the rotation fulcrum shaft 8 as a fulcrum. The rotation fulcrum shaft 8 is fixed at both ends by press-fitting into an insulating resin constituting a terminal block main body (not shown). The movable plate 26 is made of an elastic corrugated thin metal plate. Therefore, when the output supply cable is fixed to the conductive plate 15 which is the screw terminal receiving portion with the screw 2, the movable plate 26 bends with the rotation fulcrum shaft 8 as a fulcrum, and the contact 12 becomes the printed circuit board insertion pin. Is in contact with the metal plate 7 having the lead terminals 7R.

  The configuration of the other parts is the same as that of the first embodiment, and the description is omitted here.

  As described above, in the case where the movable plate 26 is made of a normal thin metal sheet having no elasticity, the movable plate 26 is made to have a corrugated shape as shown in FIG. As in the first terminal block, the stress on the solder layer 11 can be relaxed.

Embodiment 3 FIG.
Further, as shown in FIG. 11, the contact portion of the metal plate 27 having the pins for inserting a printed circuit board with the contact 12 is a metal plate 27 having an arc-shaped portion having the same semicircular cross section as the movable plate 26. May be taken. Other configurations are the same as those of the terminal block according to the first embodiment shown in FIG. The same parts are denoted by the same reference numerals.

  With this configuration, the contact surface between the contact 12 and the metal plate 27 can be enlarged, and the contact resistance can be reduced.

Embodiment 4 FIG.
Hereinafter, Embodiment 4 will be described in detail with reference to the drawings. Embodiment 4 also shows a modification of the movable plate, and the configuration other than the movable plate is formed in the same manner as in Embodiment 1.

  12 and 13 are cross-sectional views illustrating the internal configuration of the terminal block according to the fourth embodiment. FIG. 12 illustrates a state before the movable plate screw is fastened, and FIG. 13 illustrates a state after the movable plate screw is fastened. FIG. 4 is a diagram showing the appearance of the terminal block. The terminal block according to the fourth embodiment is characterized in that a movable plate 36 made of a Z-shaped leaf spring pin is used instead of the movable plate 6. In the fourth embodiment, a pin-shaped movable plate having no rotation fulcrum shaft 8 is used. The configuration other than that the movable plate 36 is configured by the upper piece 36a, the side piece 36b, and the contact piece 36c is the same as that of the first embodiment, and the description is omitted here.

  The structure of the movable plate 36 is shown in FIGS. 14 and 15A and 15B. The movable plate 36 shown in FIG. 14 is made of a thin metal piece having elasticity constituted by Z-shaped leaf spring pins. It has a notch 37 instead of the rotation fulcrum shaft, and is configured to be easily bent. FIG. 15A shows a side view, and FIG. 15B shows a front view. The movable plate 36 is an elastic pin bent in a Z-shape. In the fourth embodiment, the movable plate 36 does not have a rotating fulcrum shaft in advance, but has a structure in which the movable plate 36 can rotate about a fold formed by the notch 37 as a fulcrum.

  In the fourth embodiment, the movable plate 36 is configured by an elastic leaf spring pin. Therefore, when the output supply cable 5b is fixed to the conductive plate 15 which is a screw terminal receiving portion with the screw 2, the movable plate 36 is bent, and the contact piece portion 36c is a lead constituting a printed circuit board insertion pin. It is brought into contact with the metal plate 7 having the terminal 7R.

  The configuration of the other parts is the same as that of the first embodiment, and the description is omitted here.

  According to such a configuration, highly reliable connection can be realized with an extremely simple configuration.

  As a modified example of the movable plate of the terminal block according to the fourth embodiment, a rod-shaped body is inserted into the notch 37 as a rotation fulcrum axis, and an insulating resin forming a terminal block body (not shown) at both ends of the rod-shaped body. May be fixed by press-fitting. Further, it is not essential to fix the rotation fulcrum axis of the movable plate to the terminal block main body, and the rotation fulcrum axis of the movable plate may not be fixed.

DESCRIPTION OF SYMBOLS 1 Terminal block main body, 1a Insulating wall, 1b Insulating partition wall, 2 screws, 2a screw head, 2b screw main body part, 2N screw thread, 2W washer, first connection part, fourth connection part, 5a power cable, 5b Output supply cable, 5f metal terminal, 6, 26, 36 movable plate, 6a, 26a upper surface, 6b, 26b side surface, 6h mounting hole, 7, 27 metal plate, 7R lead terminal, 8 rotating fulcrum shaft, 10 Printed circuit board, 11 solder layer, 12 contacts, 13 terminal block screw fixing part, 14 boss, 15 conductive plate, 15N nut, 15N ₀ screw groove, 17 wiring pattern, 19 rotation support shaft support, 20 rotation support shaft support cut, 36a Upper piece, 36b Side piece, 36c Contact piece, 37 Notch.

Claims (7)

A primary terminal fastening portion to which the primary wiring is connected, and a terminal block main body having a secondary terminal fastening portion to which the secondary wiring is connected,
A conductive plate attached to the terminal block body and connecting the primary terminal fastening portion and the secondary terminal fastening portion,
A terminal board comprising: a wiring board connected to the primary terminal fastening section or the secondary terminal fastening section;
A connection portion between the wiring board and the primary terminal fastening portion or the secondary terminal fastening portion,
A metal plate soldered to the wiring board,
It comprises a contact that contacts the metal plate, and a rotatable movable plate that is fastened to the primary terminal fastening portion or the secondary terminal fastening portion,
It said movable plate by rotating, the terminal block wherein the contact is contact to the metal plate, characterized in that the connection of the connecting portion is made.   2. The terminal block according to claim 1, wherein the movable plate is formed of an elastic body having a screw receiving portion that is fastened to the primary terminal fastening portion or the secondary terminal fastening portion. 3.   The movable plate has an L-shaped body having a screw receiving portion fastened to the primary terminal fastening portion or the secondary terminal fastening portion at one end and the contact at the other end. The terminal block according to claim 1.   The terminal block according to any one of claims 1 to 3, wherein the contact has a semicircular cross section.   The terminal block according to claim 4, wherein a contact portion of the metal plate with the movable plate has the same shape as the contact point of the movable plate.   The terminal block according to claim 2, wherein the movable plate is made of an elastic metal plate.   The terminal block according to claim 2, wherein the movable plate is made of a thin metal plate having a corrugated shape.

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