KR101317840B1 - Terminal block for relays - Google Patents

Abstract

PURPOSE: A relay terminal is provided to enable a user to conveniently manage a tool by easily replacing a relay with a separating unit which is embedded in the really terminal. CONSTITUTION: A relay separating unit is installed on a relay socket and separates a relay from the relay socket. A base (60) is combined with a top housing with a snap mode. A terminal fixing unit is installed on the base and fixes the relay terminal to the outside.

Description

Relay terminal block {TERMINAL BLOCK FOR RELAYS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay terminal block, and more particularly, to a relay terminal block suitable for driving various loads or the like using an output signal from a control system such as a PLC, or else for driving a small load in a small control device.

In general, a relay terminal block is used to mount a relay used for on / off operation when driving a specific load that requires a different voltage, requires insulation, or has a large current by using an output signal from a PLC. In many cases, the terminal blocks equipped with s are combined and used together. In order to use a combination of several terminal blocks in a group, a means for joining the terminal blocks together is required, and a representative one is a DIN rail. That is, the terminal block manufacturers standardize the mounting means of the terminal block in accordance with the standard of DIN rail so that the terminal block can be combined with a plurality of standard coupling means called DIN rail.

1A is an exemplary view showing an example in which a relay terminal block is mounted on a standard DIN rail 70, and FIG. 1B is a conventional relay terminal block having a rail mounting groove 171 formed to fit the terminal block on the DIN rail 70. It is an example. In the case of the conventional relay terminal block to be fixed to the din rail 70 is pressed by a spring for the fixed coupling of the rail edge 71 (see Fig. 10) and the groove 171 of the din rail 70 is basically fitted It has a spring adjusting means (172). When the rail edge 71 of the DIN rail 70 and the groove left and right sides of the terminal block are fitted, the spring adjusting means 172 is pressed toward the groove so that the edge of the DIN rail 70 does not escape from the terminal end of the terminal block by the elastic force. do. On the contrary, in order to exit the terminal block from the DIN rail 70, the spring adjusting means 172 is pulled by the end of the spring adjusting means 172 by the hand in the direction away from the terminal block, that is, away from the terminal block groove. You can unlock the groove and pull it out. Figure 2a is an exploded perspective view of a conventional terminal block disassembled, it can be seen that the spring 173 is coupled to the spring control means 172 is pressed toward the groove 171.

Referring again to FIG. 2A, a conventional relay terminal block is connected to a base 174, a relay 110, and a circuit board 175 fixedly coupled to a relay, and a circuit board 175 serving as a pedestal positioned below the terminal block. And an LED 176 that externally indicates the switch opening and closing state of the relay 110 outside the housing 178, all of which are embedded in the housing 178 and sealed, and the relay 110 is shown in FIG. As shown in FIG. 2B, an input terminal 181 derived outside the housing 178 is connected to, for example, a PLC signal terminal, and an output terminal 182 is used to drive a load, for example.

As another example, as shown in FIG. 2C, unlike the FIG. 2A, the relay 110 fits the pins of the relay 110 to the pins of the relay socket 160 and relays the pins of the relay socket 160 to the relay socket 160. The base 174 and the housing 178 may be sealed while being mounted on the substrate 175.

Such conventional slim relay terminal blocks have a problem in that the relay can be detached and detached because there is no gap between the relay and the relay when the plurality of slim relay terminal blocks are mounted in close contact with each other.

In addition, the conventional relay terminal block can not be mounted without the standard DIN rail 70, and can not be combined together to form a group of relay assemblies.

The present invention has been invented to solve the problems occurring in the conventional relay terminal block, and can be mounted in a simple manner by combining the relay terminal block and the relay terminal block in a simple manner anywhere without the DIN rail, even if the standard DIN rail can be used. And with the help of a disconnect mechanism built into the terminal block itself, without the need for an externally managed tool in the terminal block when a relay fails It is an object of the present invention to provide a relay terminal block in which a relay can be easily replaced.

Relay terminal block of the present invention for realizing the above object, the upper housing for receiving a relay for driving a specific load through a signal output from the control system, the input input the input, the input exposed outside the upper housing A relay terminal block comprising a terminal, an on-off switching conversion in response to a signal of the input terminal, and an output terminal exposed to the outside of the upper housing, and a lighting unit displaying an on-off state of the output terminal. A relay socket formed therein to mount the relay, a relay separating part disposed on the upper surface of the relay socket and installed inside the upper housing to change the mounting state of the relay to separate the relay from the relay socket, and a lower portion of the upper housing. A base that snaps to the upper housing and snaps on; It is provided on the base having a terminal block fixing portion for fixing the relay terminal block to the outside, characterized in that the concave line of the shape complementary to the convex line shape on the left and right sides of the base.

Preferably, the relay disconnecting portion includes a lift member positioned on an upper surface of the relay socket, an actuator connected to the lift member and exposed to the outside of the upper housing, and a handle coupled to the actuator, by the pivoting movement of the actuator. The lifting member is lifted up and the relay is lifted away from the socket.

In another preferred embodiment of the relay separating portion, the rising member positioned in the evacuation groove formed on the upper surface of the relay socket and the other end is extended to the other end extending in the horizontal direction to the rising member to rotate the lifting member about the rotation axis It consists of a push lever to be lowered, and a lever guide formed on the engaging side wall to guide the movement of the push lever.

Preferably, the terminal block fixing part includes a first fixing part and a second fixing part, which can be combined with the DIN rail and can be directly mounted on a panel other than the DIN rail, and the terminal block fixing part can be directly mounted on the panel. In the case of direct mounting on the first fixing station and the second fixing unit, the first fixing unit and the second fixing unit are moved with each other in a direction approaching each other and the DIN rail, and when directly mounted on the panel, the first fixing unit and the second fixing unit are in a direction away from each other. It includes a fastening means so that it can be fixed to the outside by exiting the base outside, the fastening means of the first fixing part and the second fixing part is a hole.

Preferably, at least one convex line is formed on one outer surface of the base, and at least one concave line is formed on the other outer surface of the base, the concave line having a shape complementary to the convex line, and coupled to the relay terminal block. When the convex line and the concave line are coupled to each other to act so as not to escape. The convex line has a structure in which the upper housing is blocked so as not to be inserted more than a predetermined time when coupled with the concave line from each other.

Preferably, when the individual relay terminal blocks are clustered with each other using the convex lines and the concave lines, the relay terminal blocks are the outermost ones of the clustered terminals. The clustered relay terminal blocks can be directly fixed to the panel by using the first fixing section and the second fixing section of each of the two terminal blocks.

Through the above configuration features, the present invention can obtain the following effects.

First, if the relay breaks down or any other change of use occurs, the relay can be replaced at any time without any tools, so the relay terminal block can be used semi-permanently. In addition, maintenance costs can be reduced and tool management convenience can be achieved.

Secondly, from a manufacturer's point of view, a separate separation mechanism such as a remover does not have to be provided to the user, thereby reducing the manufacturing cost.

Third, the relay terminal block can be mounted directly on the panel even when there is no DIN rail as well as the standard DIN rail, thereby providing flexibility and convenience of installation. In addition, since the first fixing section and the second fixing section can be moved by the snap-locking section, the spring is not required, thereby reducing the manufacturing cost according to the spring installation and installation.

In addition, in the snap coupling method using the convex line and the concave line according to the present invention, it is easy to collectively combine a plurality of relay terminal blocks, and the relay terminal block and the relay terminal block are snap-coupled and collectively combined in a collective combination. The outermost of the terminal blocks If only two relay terminal blocks are fixed, the relay terminal block located in the middle can be used without fixing, which increases productivity.

1A is an exemplary plan view illustrating an example in which a relay terminal block is mounted on a DIN rail according to an embodiment of the present invention, and FIG. 1B is a perspective view illustrating an appearance of a conventional relay terminal block.
2 is a view showing a conventional relay terminal block, (a) is an exploded view thereof. (b) is an assembly plan view thereof, (c) is an exploded view of a structure in which a relay is coupled to a relay socket as another example of a conventional relay terminal block.
Figure 3 is a perspective view from above of the appearance of a relay terminal block according to an embodiment of the present invention.
Figure 4a is a perspective view of an upper housing of the relay terminal block from the bottom as an embodiment of the present invention, Figure 4b is a perspective view of the base of the relay terminal block.
5A is a perspective view illustrating an internal structure of the relay terminal block except for the upper housing and the base as an embodiment of the present invention.
Figure 5b is a perspective view of the inside of the relay terminal block for showing a state that the relay mounted on the relay socket in Figure 5a is separated from the relay socket.
Figure 5c is a perspective view of the inside of the relay terminal block with the relay removed from the relay socket in Figure 5b.
6 is an internal perspective view of a relay terminal block for showing a state after a relay is mounted in a relay socket according to one embodiment of the present invention;
7 is an external perspective view of a relay terminal block for showing a state after a relay is mounted in a relay socket according to one embodiment of the present invention;
FIG. 8 is a perspective view of the terminal block fixing part connected to the base portion of the relay terminal block as viewed in an embodiment according to the present invention.
9 is a plan view of a relay terminal block showing an example in which the terminal block fixing part protrudes to the outside as an embodiment according to the present invention.
10 is a perspective view showing an example in which the relay terminal block according to the present invention is mounted on the DIN rail.
11 is a view showing an example in which a plurality of individual relay terminal blocks are combined to block, (a) is an explanatory diagram showing a method of coupling between individual relay terminal blocks, (b) is an example of the coupling is completed and coupled to the rail Drawing shown
12 is an exemplary view illustrating an example in which terminal blocks are clustered using concave lines and convex lines of terminal blocks, and the clustered terminal blocks may be fixed using only the first fixing part and the second fixing part in the outermost terminal block.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view from above of the appearance of a relay terminal block according to an embodiment of the present invention. The outer shell of the relay terminal block of the present invention can be largely divided into an upper housing 50 and a base 60 snap-fitting under the upper housing 50. The upper housing 50 has an entry and exit opening 55 serving as a passage for entering and exiting the relay, and an input terminal opening 53 and an output terminal 12 for exposing the input terminal 11 to the outside on both sides of the entry and exit opening. An output terminal opening 54 for exposing the outside to the outside is formed. The separating part 30 is exposed to the outside of the entrance and exit opening 55, which is necessary to replace the relay again after the relay is mounted through the entrance and exit opening 55 (for example, , When replacing it with a fault, etc.) As seen from the drawing, the relay moves away from the left or the right to release or replace the relay for releasing the fixed mounting state.

The upper housing 50 and the base 60 are comprised so that attachment and detachment are possible. This portion can be more easily understood through FIGS. 4A and 4B. Figure 4a is an embodiment of the present invention, a perspective view from above of the upper housing of the relay terminal block, Figure 4b is a perspective view showing the base of the relay terminal block. That is, referring to FIG. 4A, it can be seen that the coupling holes 57a, 57b, 57c, and 57d are formed in the upper housing 50. As shown in FIG. 4B, coupling protrusions 65a, 65b, 65c, and 65d are formed in the base 60. The coupling holes 57a, 57b, 57c, 57d and the engaging projections 65a, 65b, 65c, 65d are snap-fitted to each other so that the upper housing 50 and the base 60 are fixed to each other. However, this portion is just one example and other means may be used as long as the upper housing 50 and the base 60 can be combined.

Next, the internal structure of the relay terminal block according to an embodiment of the present invention will be described.

FIG. 5A is a perspective view illustrating an internal structure of the upper housing 50 and the base 60 in the relay terminal block and explaining the structure thereof as an embodiment of the present invention. Referring to FIG. 5A, a relay terminal block according to an exemplary embodiment of the present invention may include a circuit board 10 positioned at a lower end of the upper housing 50 in addition to the upper housing 50 and the base 60, and left and right sides on the circuit board. The input terminal 11 and the output terminal 12 are disposed at the end portion. In addition, the lighting unit 13 indicating the state of the relay 110 according to the opening and closing of the switch is located next to the input terminal 11, the relay socket 20 is located approximately in the center of the circuit board 10. The input terminal 11, the output terminal 12, the lighting unit 13, and the relay socket 20 are not only electrically connected to the circuit board 10 but also physically have a fixed force with a certain force. Connected. The lighting part 13 is LED, for example. The input terminal 11, the output terminal 12, the lighting unit 13, the relay socket 20, and the circuit board 10 are positioned in the upper housing 50.

Among the components located in the upper housing 50, a portion of the present invention is the relay socket 20 and the relay disconnect portion 30.

First, in the relay socket 20, pin holes 21a, 21b, 21c, 21d, and 21e into which the relay terminal pins 111a, 111b, 111c, and 111d are fitted are formed on the top surface 25. There are four relay terminal pins, and the corresponding five pinholes of the relay socket 20 are for general use because the positions of the relay terminal pins are different for each relay manufacturer.

The relay socket 20 also has coupling side walls 23a and 23b on both the left and right sides with reference to FIG. 5A, and coupling protrusions 112a and 112b formed on both sides of the coupling side walls 23a and 23b and the relay 110. ) Are combined to enable matching so that they do not move in the front-rear direction (the direction passing through the drawings when referring to FIG. 5A).

FIG. 5B illustrates an internal perspective view of a relay terminal block to show a state in which a relay mounted on the relay socket in FIG. 5A is separated from the relay socket.

Another characteristic of the present invention, the separation unit 30 has an evacuation groove 34 of the elevating member 31 on the upper surface 25 of the relay socket 20 and the elevating member 31 is located therein and the elevating member 31 is located therein. The rotating shaft 35 of the) is coupled to the shaft groove 36 formed in the upper housing 50, and includes a lift member 31, an actuator 32 connected to the lift member and a handle 33 coupled to the actuator. . The handle 33 extends out of the relay entrance and exit opening 55 as also shown in FIG. Accordingly, when the user moves the handle 33 of the separating part 30 from the left to the right direction, that is, from the left to the right direction (based on the drawing of FIG. 5A), the lifting member 31 connected to the actuator 32 is moved. Lifted while turning Accordingly, the relay 110 mounted on the relay socket 20 is also lifted up together, and the relay terminal pins 111a, 111b, 111c, and 111d come out of the socket pinholes 21a, 21b, 21c, and 21e, while the relay socket is provided. It is lifted above the relay entry / exit opening 55 of the upper housing 50 while slightly deviating from the engaging side walls 23a and 23b of the 20. Therefore, the mounted relay 110 can be easily taken out through the relay entrance / exit opening 55 of the upper housing 50.

Therefore, in the case of the present invention, since the relay 110 mounted through the separating unit 30 can be easily separated, there is no need to provide a separate storing mechanism such as a remover. In addition, the difficulty of separation when using the conventional remover does not have to suffer in the case of the terminal block of the present invention.

6 is an internal perspective view of a relay terminal block for showing a state after the relay 110 is mounted in the relay socket 20 as an embodiment of the present invention. When the relay 110 is replaced with a new one, the relay terminal pin is aligned with the pin hole of the socket as it is through the relay entrance / exit opening 55 of the upper housing 50, and the coupling protrusions 112a and 112b of the relay 110 are replaced. When pressed and inserted in accordance with the engaging side walls (23a, 23b) of the socket 20 is as shown in FIG. 7 is an external perspective view of a relay terminal block for showing a state after the relay is mounted in the relay socket as an embodiment of the present invention, and is an external view after the relay 110 is inserted into the relay terminal block.

Therefore, in the case of the relay terminal block according to the present invention, it is easy to replace the relay 110, and even when replacing the relay, it is very convenient because it does not need a remover to be maintained separately from the terminal block for each type.

FIG. 8 is a perspective view of the terminal block fixing part connected to the base portion of the relay terminal block as viewed according to the present invention. Although shown in FIG. 5 at the bottom as an internal structural diagram, referring to FIG. 8, a first fixing part 41 and a second fixing part 42 for physically fixing the entire relay terminal block to the outside are provided in the base 60 at the lower part. Is located. The first fixing part 41 and the second fixing part 42 have fastening means 41a, 42a and DIN rail coupling parts 41b, 42b, respectively, and connect the relay terminal block to the DIN rail. In this case, the DIN rail coupling parts 41b and 42b move in the directions facing each other and are fitted under the rail edge 71 of the DIN rail 70 to be coupled to each other (see FIG. 10). 10 is a perspective view showing an example in which the relay terminal block according to the present invention is mounted on the DIN rail.

 In addition, when coupled to a general external object other than the DIN rail, the fastening means 41a, 42a move in a direction away from each other and protrude to both sides of the base 60 (see FIGS. 9 and 11 (c)). . It is understood that the fastening means 41a and 42a are holes, and the bolt can be inserted into the hole so that the relay terminal block of the present invention can be fixed to an appropriate external object by using the fastening means. FIG. 9 is a plan view illustrating a relay terminal block according to an embodiment of the present invention, in which a terminal block fixing part protrudes to the outside and is fixed with bolts to an external object other than a DIN rail.

The first fixing part 41 and the second fixing part 42 do not need a separate spring because they can be moved in a snapping manner at a certain distance each time they move. When the spring is intervened, the burden of installing and handling the elastic material can be reduced, thereby reducing the manufacturing man-hours and consequently reducing the manufacturing cost.

Therefore, the relay terminal block according to the present invention may be mounted on the DIN rail or the relay terminal block may be fixed by fastening bolts to an external object without the DIN rail.

Referring back to FIGS. 7 and 8, the base 60 is moved to the left and right about the center of the front face (front face as viewed in FIG. 7) and the rear face (front face as viewed in FIG. 8). Again, convex lines 62a and 62b and concave lines 61a and 61b are formed at both centers, and the convex lines 62a and 62b and concave lines 61a and 61b are complementarily coupled to each other to be fixed. As a result, the individual relay terminal blocks can be overlapped with each other (that is, by combining the front and the rear).

FIG. 11 is a view showing an example in which a plurality of individual relay terminal blocks are combined and blocked, (a) is an explanatory diagram showing a method of coupling between individual relay terminal blocks, and (b) a coupling is completed and the DIN rail 70 Is an example coupled to). That is, as shown in FIG. 11A, the convex lines 62a and 62b of one relay terminal block are pushed and inserted into the concave lines 61a and 61b of the other terminal block from the bottom. By repeating such a combination, individual relay terminal blocks can be collectively combined as shown in FIG. 11 (b), so that the control system can have a switching control terminal for on / off driving of a load in a control system.

In addition, FIG. 12 clusters the terminal blocks by using the concave lines 61a and 61b and the convex lines 62a and 62b of the terminal block, and the first fixing part 41 and the second fixing part 42 in the outermost terminal block. It is an exemplary view showing a structure that can be used to fix the clustered terminal block to the outside using only. Therefore, in the case of the embodiment of Figure 12, it is possible to reduce the need to use the fixed portion of the terminal block for each terminal block.

13 and 14 show another embodiment of the separating unit according to the present invention, in which FIG. 13A shows a state in which the push lever is not pressed, and FIG. 13B shows a state in which the push lever is pressed. 14 is an exploded perspective view of the separation unit.

As shown in FIG. 13A, the elevating member 31 is positioned in the evacuation groove 34 formed in the upper surface 25 of the relay socket 20 and extends from the elevating member 31. 37 is installed to protrude to the outside of the coupling side wall 23c through the coupling side wall 23c in which the lever guide 190 is integrally formed.

In addition, the push lever 180 is vertically coupled to the end of the extension portion 37 of the rising member 31 protruding to the outside of the coupling side wall (23c).

When the pressing lever 180 presses the extension 37 extending from the raising member 31, as shown in FIG. 13B, the pressing lever 180 rotates the raising member 31 upwardly about the rotation shaft 35. do.

5A and 5B, when the rising member 31 is raised, the relay 110 mounted on the relay socket 20 is also lifted together, and the relay terminal pins 111a, 111b, 111c, and 111d are lifted up. Escape from the socket pinholes 21a, 21b, 21c, and 21e, while being slightly out of the engagement side walls 23a and 23c of the relay socket 20, and is lifted above the relay entry / exit opening 55 of the upper housing 50. . Therefore, the mounted relay 110 can be easily taken out through the relay entrance / exit opening 55 of the upper housing 50.

On the other hand, in order to accurately transmit the pressing force of the pressing lever 180 to the extension portion 37 of the elevating member 31, as shown in Figure 14 the end of the elevating member 31 extension portion 37 of the arc type The coupling groove 38 is formed, and at the end of the push lever 180 which is in contact with the extension 37 of the lifting member 31, a coupling protrusion 182 corresponding to the coupling groove 38 is formed to be fastened. It is preferable to. Accordingly, when the coupling protrusion 182 is pressed into the coupling groove 38, the coupling protrusion 182 is rotatable without being easily detached from the coupling groove 38, and thus the pressing lever 180 is pressed. When the pressing force can be accurately transmitted to the extension portion 37 of the lifting member (31).

In addition, the coupling side wall (23c) is formed with a lever guide 190 for guiding the movement of the push lever 180 to prevent separation. Therefore, when the pressing lever 180 is pressed, the pressing force may be accurately transmitted to the extension 37 of the lifting member 31 without the pressing lever 180 flowing.

As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited thereto, and various changes and modifications may be made by those skilled in the art. For example, the pinhole of a relay socket can accommodate only one relay, but can also be configured to accommodate two relays at the same time. In addition, although the fastening means of the second fixing part is made of a hole, it is also possible to snap to the external object to be fitted. In other words, the above-described modifications and other obviously various modifications and variations will be within the scope of the present invention.

10. Circuit board, 11. Input terminal, 12. Output terminal, 13. Lighting unit,
20. Relay sockets, 21a, 21b, 21c, 21d, 21e. Pinhole,
23a, 23b. 23c. Engaging side wall, 25. top surface, 30. separation part, 31. lifting member,
32. Actuator, 33. Handle, 34. Evacuation groove, 35. Rotation shaft, 36. Shaft groove,
41. First Government, 41a. Fastening means, 41b. Rail joint,
42. Second Government, 42a. Fastening means, 42b. Rail Joint,
50. Upper housing, 53. Input terminal opening, 54. Output terminal opening, 55. Entry and exit opening,
57a, 57b, 57c, 57d. Engagement hole, 60. Base, 61a, 61b. Concave Line,
62a, 62b. Convex lines, 65a, 65b, 65c, 65d. Engaging projection, 70. Rail,
71.Rail edge, 110.Relay, 111a, 111b, 111c, 111d. Terminal Pin,
112a, 112b. Engaging projection, 171. rail mounting groove, 172. spring adjustment means,
174. Base, 175. Circuit board, 176. LED, 180. Push lever, 182. Coupling protrusion.

Claims (6)

An upper housing accommodating a relay for driving a specific load through a signal output from a control system, an input terminal for inputting the signal, exposed to the outside of the upper housing, and an on / off switching conversion according to the signal of the input terminal In the relay terminal block including an output terminal exposed to the outside of the upper housing and the on-off state of the output terminal at the same time,
A relay socket formed in the upper housing to mount a relay;
A relay separating unit installed on the relay socket and changing the mounting state of the relay to detach the relay from the relay socket;
A base that snaps to the upper housing at a lower portion of the upper housing;
A terminal block fixing part installed at the base to fix the relay terminal block to the outside;
Concave lines formed on the left and right sides of the base in a shape complementary to the convex line,
The relay separating part is a rising member which is located in the evacuation groove formed on the upper surface of the relay socket, the push lever is fastened to the other end extending in the horizontal direction to the rising member to rotate the lifting member about the rotating shaft to move up and down, and Relay terminal block, characterized in that consisting of a lever guide formed on the engaging side wall to guide the movement of the push lever.
The method of claim 1,
The relay separating part includes a lift member positioned on an upper surface of the relay socket, an actuator connected to the lift member and exposed to the outside of the upper housing, and a handle coupled to the actuator, and the lift member is moved by pivoting the actuator. A relay terminal block, wherein the relay rises and is released from the relay socket while rising from the socket.
delete 3. The method of claim 2,
The rising member is installed in the evacuation groove formed on the upper surface of the relay socket, the relay terminal block characterized in that it is made to protrude above the upper surface of the relay socket when the actuator is pivoting or pressing the push lever to separate the relay into the relay socket.
3. The method according to claim 1 or 2,
The terminal block fixing part is coupled to the DIN rail, including the first fixing part and the second fixing part,
When the terminal block fixing part is coupled to the DIN rail, the first fixing part and the second fixing part move in an approaching direction to be coupled to the DIN rail edge, and when the terminal fixing part is not the DIN rail type, the first fixing part and the second fixing part are coupled with the first fixing part. Relay terminal block characterized in that the second fixing portion is fastened to be fixed to the outside by coming out of the base in a direction away from each other.
The method of claim 1,
When the convex line is coupled with the concave line from the bottom to the upper housing is provided so that the upper housing is blocked. When the individual relay terminal blocks are clustered with each other using the convex line and the concave line, only the two terminal blocks are formed by using the first fixing part and the second fixing part of each of the two terminal blocks. Relay terminal block, characterized in that can be fixed without being separated from the relay terminal block located in the middle.

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