JP2017112008A - Terminal block - Google Patents

Abstract

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 with a screw is applied to a solder joint portion of a pin connected to a wiring board. To provide a terminal block that can alleviate the occurrence of damage. A terminal block body 1 having a first connection portion 3 to which a primary side wiring is connected and a second connection portion 4 to which a secondary side wiring is connected; The terminal block includes a conductive plate 15 that connects the first connection portion 3 and the second connection portion 4, and a printed circuit board 10 that is connected to the first connection portion 3 or the second connection portion 4. The printed circuit board 10 and the first connection part 3 or the second connection part 4 include a metal plate 7 solder-connected to the printed circuit board 10 and a contact 12 that contacts the metal plate 7. Or the movable plate fastened to the 2nd connection part 4 is provided, and a connection is achieved when the contact 12 and the metal plate 7 contact | abut. [Selection] Figure 2

Description

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

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

  In the conventional terminal block, as described in Patent Document 1, for example, the output supply cable is fastened to the metal terminal portion with screws. In addition, the metal terminal part to which the screw is fastened also serves as a printed circuit board insertion pin, and the metal terminal part is directly fixed to the printed circuit board with solder as a power supply lead terminal, and power is supplied to the power supply pattern. It has a structure to supply. The voltage detection unit is also fixed to the metal terminal unit and serves also as a voltage detection lead terminal, and is directly fixed to the voltage detection pattern with solder.

Japanese Utility Model Publication No. 5-55466

  In the configuration of Patent Document 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, the stress at the time of screw fastening is a power supply lead terminal that is connected to the printed circuit board and It has a structure that 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 portion of each lead terminal connected to the printed circuit board, and the stress due to the stress on the solder joint portion increases, and the reliability of the soldered portion decreases. It 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 with a screw to a screw terminal receiving portion of a terminal block is a wiring board. An object of the present invention is to provide a terminal block capable of mitigating being applied to a solder joint portion of a pin connected to a pin.

  In order to solve the above-described problems and achieve the object, the present invention provides a terminal having a primary side terminal fastening portion to which a primary side wiring is connected and a secondary side terminal fastening portion to which a secondary side wiring is connected. A base body, a conductive plate mounted on the terminal base 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 side terminal fastening part or the secondary side terminal fastening part has a metal plate solder-connected to the wiring board and a contact point that contacts the metal plate. A movable plate fastened to the side terminal fastening portion is provided, and the connection portion is connected by contact between the contact and the metal plate.

  According to the present invention, the stress generated when the cable is fastened to the screw terminal receiving portion of the terminal block by the screw can be applied to the solder joint portion of the pin connected to the wiring board. Provide terminal block.

Explanatory drawing which shows the external structure of the terminal block of Embodiment 1. FIG. Sectional drawing which shows the internal structure before the movable plate screw fastening of the terminal block of Embodiment 1. Sectional drawing which shows the internal structure at the time of fastening of the movable plate screw of the terminal block of Embodiment 1 The perspective view which shows the external appearance of the terminal block of Embodiment 1 The principal part expanded sectional view before the movable plate screw fastening of the terminal block of Embodiment 1 The principal part expanded sectional view at the time of the movable plate screw fastening of the terminal block of Embodiment 1 The principal part expansion perspective view of the movable plate of the terminal block of Embodiment 1 It is a principal part enlarged view of the movable plate of the terminal block of Embodiment 1, (a) is a side view, (b) is a front view. The principal part expansion perspective view of the movable plate of the terminal block of Embodiment 2 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 at the time of the movable plate screw fastening of the terminal block of Embodiment 3. Sectional drawing which shows the internal structure before the movable plate screw fastening of the terminal block of Embodiment 4. Sectional drawing which shows the internal structure at the time of the movable plate screw fastening of the terminal block of Embodiment 4. The principal part expansion perspective view of the movable plate of the terminal block of Embodiment 4 It is a 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.

  Embodiments of a terminal block according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment, In the range which does not deviate from the summary of this invention, it can change suitably. In the drawings shown below, the scale of each member may be different from the actual scale for easy understanding. The same applies between the drawings.

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 is a view before the movable plate screw is fastened and FIG. 3 is a view after the movable plate screw is fastened. FIG. 4 is a view showing the appearance of the terminal block. The terminal block according to the first embodiment includes a first connection portion 3 that is a primary side terminal fastening portion that is connected to a resin terminal block body 1 by using a screw 2 and a second terminal fastening portion that is a secondary side terminal fastening portion. The connection part 4 is provided. A printed circuit board 10 as a wiring board is mounted on the terminal block of the first embodiment. The second connecting portion 4 includes a metal plate 7 solder-connected 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. Plate 6. The contact of the contact 12 provided on the movable plate 6 and the metal plate 7 makes contact with the printed circuit board 10 to achieve the connection of the second connection portion 4. On the other hand, the 1st connection part 3 achieves the connection of the power cable 5a and the conductive plate 15 of a terminal block with the screw 2. FIG. When the first connecting portion 3 and the second connecting portion 4 achieve the connection, the voltage from the power cable 5a connected to the power supply line is connected to the load via the conductive plate 15 for output supply. It is transmitted to the cable 5b.

  In the terminal block of the first embodiment, as shown in FIGS. 2 and 3, the first connection portion 3 is electrically connected to the metal terminal portion 5f that is a crimp terminal at the end of the power cable 5a connected to the power line, and the 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 that is the screw terminal receiving portion by the screw 2.

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

  FIG. 2 shows an internal configuration diagram of the terminal block main body 1 before the screws are fastened 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 the rotation fulcrum shaft 8 in the vicinity of the boundary between the upper surface portion 6 a and the side surface portion 6 b, and has a structure capable of rotating along the rotation fulcrum shaft 8.

The movable range angle toward the inside of the terminal block 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 portion 6 a and the side surface portion 6 b of the movable plate 6 and the angle α ₀ of the corner portion of the conductive plate 15 is the movable range of the movable plate 6. . The angle formed by the upper surface portion 6a and the side surface portion 6b of the movable plate 6 is limited within the range of α ₁ -α ₀ as shown in FIG. Therefore, when the movable range is limited, the floating of the upper surface portion 6 and the side surface portion 6b of the movable plate 6 from the conductive plate 15 has a structure in which the fastening with the screw 2 can be easily performed.

  Further, the output supply cable 5 b and the upper surface portion 6 a 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 is brought into contact with the fixed metal plate 7 having the lead terminals 7R, which are printed circuit board insertion pins, at the contact points 12, and can be energized. Electrical connection is achieved.

  Further, the contact point 12 of the side surface portion 6b of the movable plate 6 has a semicircular cross section, and is displaced when the upper surface portion 6a of the movable plate 6 is fastened to the conductive plate 15 with the screw 2. In addition, the metal plate 7 is reliably contacted.

  The metal plate 7 provided with the lead terminal 7R for inserting the printed circuit board is held in the recess 9 provided in the terminal base body 1 made of insulating plastic, and the lead terminal 7R is inserted into the printed circuit board 10. Bonded by the solder layer 11.

  The output supply cable 5b for supplying 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. The metal plate 7 having the lead terminals 7R which are pins for inserting the printed circuit board is The contact is made at the contact 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 can avoid that the stress which generate | occur | produces at the time of the fastening of the screw 2 applies to the solder layer 11 directly, the intensity | strength of a connection part improves, and reliability improves.

  As shown in FIG. 4, in the terminal block of the first embodiment, a terminal block main body 1 made of a heat-resistant resin such as polycarbonate resin and made of a resin molded body having an insulating wall 1a and a central insulating partition 1b is used. It is done.

  FIGS. 5 and 6 are enlarged views of the main part showing the fastening structure of the terminal fastening portion in the terminal block of the first embodiment. FIG. 5 shows the bolts and nuts or male threads constituting the fastening structure of the terminal fastening portion. The figure which shows an internal thread, FIG. 6 is explanatory drawing which shows a fastening state. In the terminal block of the first embodiment, the washer 2W is inserted into the screw 2 that fastens the metal terminal portion 5f and the conductive plate 15 formed at the distal end portions of the first connection portion 3 and the second connection portion 4. And conclude. The screw 2 includes a screw head 2a and a screw main body 2b, and a screw thread 2N is formed on the screw main body 2b.

Each of the first connecting portion 3 and the second connecting portion 4 that are terminal fastening portions includes a nut 15 </ b> N formed on the conductive plate 15 disposed in the concave portion of the terminal base body 1, and a bolt that constitutes the screw 2. It is concluded by. 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 interposing the conductor portions to be connected, terminal connection is realized as shown in FIG. Here, the conductor part to be connected is the metal terminal part 5 f, and the metal terminal part 5 f 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 for supplying the voltage of the power supply line is fixed to the terminal base body 1 with the screw 2, the stress on the lead terminal 7R connected to the printed circuit board 10 is relieved, and the solder 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 directly the lead terminal 7R, but a movable body constituted by an L-shaped body having a leaf spring function, that is, a metal plate having an L-shaped cross section. The plate 6 is used. The contact point 12 of the movable plate 6 is brought into contact with the metal plate 7 having the lead terminals 7R connected to the printed circuit board 10, thereby realizing the electrical connection between the output supply cable 5b and the printed circuit board 10. . The stress generated when the output supply cable 5b for supplying the voltage of the power supply line is fastened with the screw 2 to the second connection portion 4 constituting the screw terminal receiving portion of the terminal block by adopting the above configuration. However, application to the solder layer 11 constituting the solder joint portion of the lead terminal 7R connected to the printed circuit board 10 can be mitigated.

  Further, as shown in FIGS. 1 to 3, the terminal block main body 1 is positioned on the contact surface of the terminal block main body 1 with the printed 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 are provided at the four corners. Furthermore, 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. In FIG. 1, the screw fixing portion 13 is only seen on the A side, but is also provided on the B side. By having a shape that can fix the terminal block body 1 with the screw 2, the terminal block body 1 can be reliably fixed to the printed circuit board 10.

  Since each power cable 5a, output supply cable 5b, etc., and the connection portions 3 and 4 between the screw 2 and the conductive plate 15 constituting the screw terminal receiving portion are made of electrically connectable metal. The insulating partition wall 1b for preventing the contact portion of the output supply cable 5b with the screw 2 and the first and second connecting portions 3 and 4 of the terminal base body 1 to be fixed from contacting other conductive portions adjacent to each other is provided. Is provided.

  The terminal block main body 1 is fixed to the printed circuit board 10 with printed circuit board fixing bosses 14, and the metal plate 7 having lead terminals 7 </ b> R constituting insertion pins to the printed circuit board 10 is connected to the printed circuit board 10 and the solder layer. 11, the wiring pattern 17 of the printed circuit board 10 and the solder layer 11 are joined.

  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 composed of a thin plate-like metal 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 the rotation fulcrum shaft support cut 20 of the movable plate 6. The movable plate 6 is rotatably supported by the rotation fulcrum shaft support 19 with respect to the rotation fulcrum shaft 8, and the movable plate 6 can move about the rotation fulcrum shaft 8. Moreover, the rotation fulcrum shaft 8 is press-fitted and fixed to an insulating resin constituting the terminal block body 1 at both ends. Since the movable plate 6 is composed of a thin metal plate having elasticity, 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 6 causes the rotation fulcrum shaft 8 to move. By bending as a fulcrum, the contact 12 comes into contact with the metal plate 7 having the lead terminals 7R constituting the printed circuit board insertion pins.

  As described above, in the first embodiment, the metal terminal portion 5f fastened with the screw 2 to the cable such as the power cable 5a and the output supply cable 5b of the terminal block body 1 and the printed board 10 with solder. The fixed lead terminals 7R are separated without being integrated. Then, the movable plate 6 constituting the metal terminal portion fastened by the screw 2 is constituted by a rotatable metal leaf spring, and a fixed plate having lead terminals 7R fixed to the printed circuit board 10 by soldering. The metal plate 7 is contacted by a contact 12 and connected.

  With this configuration, the load stress applied to the lead terminal 7R fixed to the printed circuit board 10 by solder due to the stress generated when the screw 2 is fastened to the metal terminal portion 5f to which the output supply cable 5b is fastened. And 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 alleviated, and the solder The reliability of the joint can be improved.

  In the terminal block according to the first embodiment, the terminal block body 1 has bosses 14 that can be fixed to the printed circuit board 10 at each corner of the terminal to prevent the mounting position of the printed circuit board 10 from being displaced. Further, on both sides of the terminal block main body 1, there are screw fixing portions 13 that can firmly fix the terminal block main body 1 to the printed circuit board 10, thereby preventing displacement of the terminal block inserted into the printed circuit board 10. It has a structure. Therefore, more reliable fixing is possible.

  In the first embodiment, the screw terminal receiving portion is configured to fix the two cables to the same conductive plate 15 so that the power 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 so that a plurality of output supply cables on the secondary terminal side are electrically joined to one cable on the primary terminal side You may make it the structure which has a terminal receiving part which can fix cables, such as several output supply cables, in the terminal side or the secondary terminal side.

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

  The terminal block is used in control panels, switchboards, and power conditioner devices for connection, relaying, or branching to cables connected to a power source such as AC100V or 200V. If the current flowing through the terminal block is large, The screw type is mainly used. There is also a board terminal block for directly connecting the power line to the printed board via the terminal block. However, in the case of a terminal block having a structure in which the power supply line is directly connected to the printed circuit board via the terminal block, the pins connected to the printed circuit board are often integrated with the screw receiving portion of the terminal block. For this reason, 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 screws, stress is applied to the solder joint portion of the printed circuit board 10 and the reliability of the solder joint portion is reduced. In the first embodiment, there is no concern about the above, and the reliability of the solder joint can be improved.

Embodiment 2. FIG.
Hereinafter, the second embodiment 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, 10 (a) and 10 (b). The movable plate 26 shown in FIG. 9 is composed of a corrugated thin metal plate having elasticity. FIG. 10A shows a side view of the movable plate, and FIG. 10B shows 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 the 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 can rotate about the rotation fulcrum shaft 8. Further, the rotation fulcrum shaft 8 is press-fitted and fixed at both ends into an insulating resin constituting a terminal block body (not shown). The movable plate 26 is composed of a corrugated thin metal plate having elasticity. Therefore, when the output supply cable is fixed to the conductive plate 15 which is the screw terminal receiving portion by the screw 2, the movable plate 26 bends with the rotation fulcrum shaft 8 as a fulcrum, so that the contact 12 becomes a printed circuit board insertion pin. It contacts with the metal plate 7 which has the lead terminal 7R which comprises.

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

  As described above, when the movable plate 26 is composed of a normal metal thin plate having no elasticity, the movable plate 26 has a wave shape as shown in FIG. Similar to the terminal block 1, the stress relaxation to the solder layer 11 can be realized.

Embodiment 3 FIG.
Further, as shown in FIG. 11, the contact portion of the metal plate 27 having the printed board insertion pin with the contact 12 is a metal plate 27 having an arc-shaped portion having the same semicircular arc shape as that of the movable plate 26. You may take Since other configurations are the same as those of the terminal block of the first embodiment shown in FIG. 3, the description thereof is omitted here. The same symbols are assigned to the same parts.

  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, the fourth embodiment will be described in detail with reference to the drawings. The fourth embodiment is also a modification of the movable plate, and the configuration other than the movable plate is the same as that of the first embodiment.

  12 and 13 are cross-sectional views showing the internal configuration of the terminal block according to the fourth embodiment. FIG. 12 is a view before the movable plate screw is fastened, and FIG. 13 is a view after the movable plate screw is fastened. FIG. 4 is a view 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 in place of the movable plate 6. In the fourth embodiment, a pin-shaped movable plate having no rotation fulcrum shaft 8 is used. Since the configuration except that the movable plate 36 includes the upper piece 36a, the side piece 36b, and the contact piece 36c is the same as that of the first embodiment, the description thereof 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 composed of a thin metal piece having elasticity composed of Z-shaped leaf spring pins. Instead of the rotation fulcrum shaft, it has a notch 37 so that it can be bent easily. FIG. 15A shows a side view and FIG. 15B shows a front view. The movable plate 36 is an elastic pin bent into a Z shape. In the fourth embodiment, the movable plate 36 is not configured to have a rotation fulcrum shaft in advance, but has a structure capable of rotating around a fold mountain formed by the notch 37 as a fulcrum.

  In the fourth embodiment, the movable plate 36 is configured by a plate spring pin having elasticity. Accordingly, when the output supply cable 5b is fixed to the conductive plate 15 which is the screw terminal receiving portion by the screw 2, the movable plate 36 is bent, so that the contact piece portion 36c is a lead constituting the printed circuit board insertion pin. It contacts the metal plate 7 having the terminal 7R.

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

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

  As a modification of the movable plate of the terminal block of the fourth embodiment, as a rotation fulcrum shaft, a rod-shaped body is inserted into the notch 37, and an insulating resin constituting a terminal block body (not shown) at both ends of the rod-shaped body. You may press-fit into and fix. Further, it is not essential to fix the rotation fulcrum shaft of the movable plate to the terminal base body, and the rotation fulcrum shaft of the movable plate may not be fixed.

1 Terminal block body, 1a insulation wall, 1b insulation partition, 2 screws, 2a screw head, 2b screw body, 2N thread, 2W washer, 3 first connection, 4 second connection, 5a power cable, 5b Output supply cable, 5f metal terminal, 6, 26, 36 movable plate, 6a, 26a top surface, 6b, 26b side surface, 6h mounting hole, 7, 27 metal plate, 7R lead terminal, 8 rotation 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 thread groove, 17 Wiring pattern, 19 Rotating fulcrum shaft support, 20 Rotating fulcrum shaft support notch, 36a Upper piece part, 36b Side piece part, 36c Contact piece part, 37 Notch.

Claims (7)

A terminal block body having a primary terminal fastening portion to which the primary wiring is connected and a secondary terminal fastening portion to which the secondary wiring is connected;
A conductive plate attached to the terminal block main body and connecting the primary side terminal fastening portion and the secondary side terminal fastening portion;
A terminal block comprising a wiring board connected to the primary side terminal fastening portion or the secondary side terminal fastening portion,
A connection portion between the wiring board and the primary side terminal fastening portion or the secondary side terminal fastening portion,
A metal plate solder-connected to the wiring board;
A contact point that contacts the metal plate, and a movable plate fastened to the primary side terminal fastening part or the secondary side terminal fastening part,
The terminal block is characterized in that the connection portion is connected by the contact of the contact point and the metal plate.   The terminal block according to claim 1, wherein the movable plate is formed of an elastic body having a screw receiving portion fastened to the primary side terminal fastening portion or the secondary side terminal fastening portion.   The movable plate is formed of 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 or 2.   The terminal block according to claim 1, wherein the contact has a semicircular cross-sectional shape.   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 formed of a metal thin plate having a wave shape.

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