Control center shutter mechanism

Abstract

A shutter mechanism (20) for a control center is provided with a shutter cover (8) attached to a partition plate (7) that separates a busbar room (5) of a control center (100) from a functional unit room (4) in which a functional unit (1) to be implemented is disposed. The shutter cover (8) has a front protrusion (9) that protrudes forward from its bottom, and the functional unit (1) has a spacer (11) on its bottom. When the functional unit (1) is inserted into the functional unit room (4), the spacer (11) provided on the functional unit (1) presses against the front protrusion (9) of the shutter cover (8). As the functional unit is inserted into the functional unit room (4), the shutter cover (8) moves in conjunction with the functional unit and opens, thereby enabling a connection between the busbar (6) and the junction (2) of the functional unit (1).

Description

[Technical field]

[0001] This application relates to a shutter mechanism for a control center. [Background technology]

[0002] The purpose of a distribution board is to open and close, control, protect, and monitor the electrical circuits of the load equipment connected to the distribution circuit, and each compartment contains multiple functional units with these functions. Each functional unit is supplied with power from the busbar inside the distribution board case, and each unit has a junction for power supply, which is connected to the busbar inside the case when the functional unit is inserted into the case. For this reason, a shutter mechanism is provided between the functional unit room and the busbar room to prevent accidental contact with the busbar.

[0003] Conventionally, a distribution board shutter device has been disclosed that has a rotating cam and shutter retaining rod in a functional unit chamber and a shutter mechanism that opens and closes in conjunction with the insertion position of the functional unit, thereby eliminating the risk of touching a live busbar before and after inserting a functional unit. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5618806 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the case of a control center that specializes in space saving, it is difficult to install the disclosed shutter mechanism due to space limitations.

[0006] The present application discloses a technique for solving the above-mentioned problems, and has an object to provide a shutter mechanism for a control center in which the shutter opens and closes in conjunction with the insertion and withdrawal of a functional unit. [Means for solving the problem]

[0007] The shutter mechanism of a control center disclosed in the present application is a shutter mechanism of a control center that includes a shutter cover attached to a partition plate that separates a busbar room in which a busbar of the control center is arranged and a functional unit room in which functional units to be mounted in the control center are arranged, and the shutter cover includes a front projection that projects in a front direction from a bottom of the shutter cover, and the functional units include spacers on their bottom surfaces. When the functional units are inserted into the functional unit room, the spacers on the functional units press against the front projection of the shutter cover, and the shutter cover moves in conjunction with the insertion of the functional units, thereby opening the shutter cover. The structure allows the cover to open to connect the busbar and the junction of the functional unit, the shutter cover has two front protrusions on both the left and right sides of the functional unit, and two spacers on the bottom surface of the functional unit corresponding to the two front protrusions, the front protrusions of the shutter cover slip under the bottom plate of the functional unit, and the surface of the functional unit that comes into contact with the spacer is slanted diagonally relative to the functional unit, and the functional unit is inserted straight from the front of the functional unit chamber, while the shutter cover moves horizontally perpendicular to the insertion direction of the functional unit. The shutter mechanism of a control center disclosed in the present application is a shutter mechanism of a control center that includes a shutter cover attached to a partition plate that separates a busbar room in which a busbar of the control center is arranged and a functional unit room in which functional units to be mounted in the control center are arranged, and the shutter cover includes a front projection that projects in a front direction from a bottom portion thereof, and the functional units include spacers on their bottom surfaces, and when the functional units are inserted into the functional unit room, the spacers provided on the functional units press against the front projection of the shutter cover, thereby forming a shutter mechanism for a functional unit insertion. At the same time, the shutter cover moves in conjunction with the functional unit and opens to allow connection between the busbar and the junction of the functional unit. The shutter cover has two front protrusions on both the left and right sides of the functional unit, two spacers are provided on the bottom surface of the functional unit corresponding to the two front protrusions, and a test position protrusion is provided on the side of the front protrusion of the shutter cover. When the functional unit is inserted or pulled out of the functional unit chamber, the spacer provided on the functional unit comes into contact with the test position protrusion provided on the shutter cover and is not caught at the test position. The functional unit can be held in the test position. The test position protrusion is a protrusion provided on a side surface of the front protrusion of the shutter cover in a direction that restricts movement of the functional unit in the insertion direction and the removal direction. The shutter mechanism for a control center disclosed in the present application is a shutter mechanism for a control center that includes a shutter cover attached to a partition plate that separates a busbar room in which a busbar of the control center is arranged and a functional unit room in which functional units to be mounted in the control center are arranged, the shutter cover includes a front protrusion that protrudes in a front direction from its bottom, and the functional unit includes a spacer on its bottom surface, and when the functional unit is inserted into the functional unit room, the spacer on the functional unit presses against the front protrusion of the shutter cover, so that the shutter cover moves in conjunction with the insertion of the functional unit and opens to enable connection of the junction of the busbar and the functional unit, and the shutter mechanism includes a test position protrusion on a side surface of the front protrusion of the shutter cover, and when the functional unit is inserted or pulled out into the functional unit room, the spacer on the functional unit comes into contact with the test position protrusion on the shutter cover to prevent the functional unit from getting caught at the test position. The functional unit can be held in the test position. The test position protrusion is a protrusion provided on a side surface of the front protrusion of the shutter cover in a direction that restricts movement of the functional unit in the insertion direction and the removal direction. Effect of the Invention

[0008] According to the shutter mechanism of the control center disclosed in the present application, a shutter mechanism of the control center is obtained in which the shutter opens and closes in conjunction with the insertion and withdrawal of a functional unit. [Brief description of the drawings]

[0009] [Figure 1] 2 is a perspective view of a housing of the control center in the first embodiment and an enlarged view of a partition plate and a shutter cover. FIG. [Diagram 2] 4 is a front view illustrating the relationship between the shutter mechanism and a partition plate separating a bus room and a unit room of the control center in the first embodiment. FIG. [Diagram 3]4 is a front view illustrating the relationship between the shutter mechanism and a partition plate separating a bus room and a unit room of the control center in the first embodiment. FIG. [Figure 4] 4 is a top view illustrating the relationship between the shutter mechanism and the partition plate separating the bus room and the unit room of the control center in the first embodiment. FIG. [Diagram 5] FIG. 2 is a bottom view of the functional unit of the control center in the first embodiment. [Figure 6] 1 is a sectional top view showing a state in which a functional unit is inserted into a housing of a control center in the first embodiment. FIG. [Figure 7] 1 is a cross-sectional top view of a control center housing according to the first embodiment, showing a functional unit inserted up to a test position. FIG. [Figure 8] 1 is a cross-sectional top view of a control center housing according to the first embodiment, showing a functional unit inserted up to a connection position. FIG. [Figure 9] 4A and 4B are a perspective view of a housing of a control center in a comparative example of the first embodiment and an enlarged view of a partition plate and a shutter cover. [Figure 10] FIG. 2 is a perspective view of a functional unit of a control center in a comparative example to the first embodiment. [Figure 11] 13 is a sectional top view showing when a functional unit is inserted into a housing of a control center in a comparative example of the first embodiment. FIG. [Figure 12] FIG. 11 is a perspective view of a shutter mechanism of a functional unit of a control center in the second embodiment. [Figure 13] FIG. 11 is a bottom view of the functional unit of the control center in the second embodiment. [Figure 14] FIG. 11 is a cross-sectional top view showing how a functional unit is inserted into a housing of a control center in the second embodiment. [Figure 15] 13 is a cross-sectional top view of a control center housing according to the second embodiment, showing a functional unit inserted up to a test position. FIG. [Figure 16]FIG. 11 is a cross-sectional top view of a control center housing according to the second embodiment, in which a functional unit is inserted up to a connection position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Embodiment 1 Embodiment 1 is a shutter mechanism for a control center equipped with a shutter cover attached to a partition plate separating a busbar room in which the busbars of the control center are arranged and a functional unit room in which functional units to be implemented in the control center are arranged, the shutter cover having a front protrusion protruding toward the front from its bottom, and the functional unit having a spacer on its bottom, and when the functional unit is inserted into the functional unit room, the spacer on the functional unit presses against the front protrusion of the shutter cover, so that at the same time as the functional unit is inserted, the shutter cover moves in conjunction with the functional unit and automatically opens, enabling connection of the junction between the busbar and the functional unit.

[0011] The shutter mechanism of the control center in embodiment 1 will be described below based on Figure 1, which is an oblique view of the control center housing and an enlarged view of the partition and shutter cover, Figures 2 and 3, which are front views explaining the relationship between the partition separating the bus bar room and unit room of the control center and the shutter mechanism, Figure 4, which is a top view explaining the relationship between the partition separating the bus bar room and unit room of the control center and the shutter mechanism, Figure 5, which is a bottom view of the functional unit of the control center, Figure 6, which is a cross-sectional top view when the functional unit is inserted into the control center housing, Figure 7, which is a cross-sectional top view when the functional unit is inserted into the control center housing to the test position, Figure 8, which is a cross-sectional top view when the functional unit is inserted to the connection position, Figure 9, which is an oblique view of the control center housing in the comparative example and an enlarged view of the partition and shutter cover, Figure 10, which is an oblique view of the functional unit of the control center in the comparative example, and Figure 11, which is a cross-sectional top view when the functional unit is inserted into the control center housing in the comparative example. In each drawing, the same or corresponding parts are indicated by the same reference numerals, and duplicated explanations will be omitted.

[0012] First, the structure of the control center 100 and the structure and function of the functional unit 1, which is a main device, will be described with reference to Figs. 1 to 8, focusing on the configuration of the shutter mechanism 20 of the control center of the first embodiment.

[0013] The control center 100 has a plurality of functional units 1 housed in each compartment of the functional unit room 4 of the control center 100 for the purposes of opening and closing, controlling, protecting, monitoring, etc. electrical circuits to load equipment connected to a low-voltage distribution circuit. Each functional unit 1 is supplied with power from a busbar 6 inside the control center housing 3, and is equipped with a power supply junction 2. When each functional unit 1 is inserted into each compartment of the functional unit room 4 of the control center 100, it is structured to connect with the busbar 6 in the busbar room 5 inside the housing 3. In order to prevent erroneous contact with the busbar 6, it is necessary to provide a control center shutter mechanism 20 between the functional unit room 4 and the busbar room 5. The control center housing 3 will be referred to as housing 3, and the control center shutter mechanism 20 will be referred to as shutter mechanism 20, where appropriate.

[0014] The shutter mechanism 20 is composed of a partition plate 7 , a shutter cover 8 , a spring 12 , and a spacer 11 . First, the relationship between the partition plate 7, the shutter cover 8, and the spring 12 will be described with reference to FIGS. Fig. 1 shows an example of a control center 100 that houses nine functional units 1. In Fig. 1, an enlarged view of a partition plate 7 is shown in part A, and an enlarged view of a shutter cover 8 is shown in part B. In the following description, the horizontal direction of the board of the control center 100 is designated as the X direction, the depth direction as the Y direction, and the vertical direction as the Z direction.

[0015] The partition plate 7 serves to separate the busbar room 5 in which the busbars 6 of the control center 100 are arranged from the functional unit room 4 in which the functional units 1 are inserted. The shutter cover 8 is attached to this partition plate 7. Since the shutter cover 8 needs to move sideways when the functional unit 1 is inserted, it is not fixed to the partition plate 7 with screws or the like, but is attached by clamping the upper and lower parts of the partition plate 7 with multiple stoppers 15 provided on the top and bottom of the shutter cover 8. Furthermore, a spring 12 is attached between the partition plate 7 and the shutter cover 8 so that the shutter cover 8 returns to its original position (the position that hides the busbar 6) by elastic force when the functional unit 1 is pulled out from the functional unit chamber 4. The shutter cover 8 has a front protrusion 9 at one end, either left or right (X direction). In the present embodiment 1, a case will be described in which the front protrusion 9 is provided at the left end of the shutter cover 8 when the functional unit 1 is viewed from the front panel.

[0016] This front protrusion 9 is structured to protrude in the front direction (i.e., in the Y direction toward the front panel of the functional unit 1) from the bottom side of the shutter cover 8, and is positioned so that it can be slipped under the bottom plate 13 of the functional unit 1 when it is inserted into the functional unit chamber 4. In addition, the front protrusion 9 is provided with a test position protrusion 10 so that the functional unit 1 feels a catch when it is inserted or pulled out to the test position. That is, the test position protrusion 10 is provided in a direction that restricts the movement of the functional unit in the insertion direction and the pull-out direction.

[0017] The lateral movement of the shutter cover 8 in a state where it is attached to the partition plate 7 will be described with reference to Figs. Fig. 2 is a front view of the state before the shutter cover 8 is attached to the partition plate 7 and the functional unit 1 is inserted, and Fig. 4 is a top view of this state. Before the functional unit 1 is inserted into the functional unit chamber 4, the shutter cover 8 has not yet moved sideways, so the busbar 6 in the busbar chamber 5 is not exposed, as shown in Fig. 2. Fig. 3 shows the state after the functional unit 1 has been fully inserted and the shutter cover 8 has moved sideways. In this state, the positions of the busbar openings 14 provided on the shutter cover 8 and the partition plate 7 are aligned, so the busbar 6 in the busbar chamber 5 is exposed, and the junction 2 attached to the functional unit 1 is ready to be connected to the busbar 6.

[0018] Next, the spacer 11, which is a component of the shutter mechanism 20, will be described with reference to Fig. 5, which is a bottom view of the functional unit 1. Part A in Fig. 5 is an enlarged view of the spacer 11. A spacer 11 is provided on the underside of the bottom plate 13 of the functional unit 1 as shown in Fig. 5. Note that, in order to avoid the risk of this spacer 11 becoming stuck due to friction when it comes into contact with the front protrusion 9, it is desirable that the spacer 11 be flat and circular in shape and parallel to the front protrusion 9. It is also desirable that the spacer 11 be made of metal rather than resin so that it is not damaged when it comes into contact with the front protrusion 9. Furthermore, by making the spacer 11 rotatable about its circular central axis, no friction occurs between the spacer 11 and the front protruding portion 9, so that the functional unit 1 can be inserted and pulled out more smoothly.

[0019] Next, the operation of the shutter mechanism 20 of the control center will be described with reference to Figures 6 to 8. Note that in each figure, the spring 12 is omitted. Before the functional unit 1 is inserted, the shutter cover 8 prevents the live part of the busbar 6 in the busbar chamber 5 from being exposed, and when the functional unit 1 is inserted into the functional unit chamber 4, the spacer 11 attached to the bottom plate 13 of the functional unit 1 comes into contact with the front protrusion 9 of the shutter cover 8. At the same time that the functional unit 1 is inserted into the functional unit chamber 4, the spacer 11 presses against the front protrusion 9 of the shutter cover 8, and in conjunction with this, the shutter cover 8 moves sideways.

[0020] Figures 6 to 8 each show a cross-sectional view of the functional unit 1 as viewed from above. Figure 6 shows the functional unit 1 in a position where the spacer 11 comes into contact with the front protrusion 9 of the shutter cover 8 when it is inserted into the functional unit chamber 4. Figure 7 shows the functional unit 1 inserted up to the test position. Figure 8 shows the functional unit 1 inserted further, with the junction 2 of the functional unit 1 connected to the busbar 6. When the functional unit 1 is pulled out from the functional unit chamber 4, the elastic force of the spring 12 attached to one end of the shutter cover 8 causes the shutter cover 8 to move laterally as the functional unit 1 is pulled out from the functional unit chamber 4, thereby preventing the busbar 6 from being exposed.

[0021] Here, in order to clarify the features of the shutter mechanism 20 of the control center of the first embodiment, a shutter mechanism of a control center of a comparative example will be described with reference to Figures 9 to 11. In Figures 9 to 11, in order to distinguish it from the control center 100 of the first embodiment, it is shown as a control center 100R, a functional unit 1R, and a shutter cover 8R. In the comparative example, a diagonal protrusion 25 is provided on the shutter cover 8R that hides the busbar 6 in the busbar room 5, and when the functional unit 1R is inserted into the functional unit room of the control center 100R, the outer wall of the junction 2 on the back side of the functional unit 1R presses against the diagonal protrusion 25 of the shutter cover 8R, causing the shutter cover 8R to move. Also, a spring 12 is provided on one end of the shutter cover 8R so that the shutter cover 8R returns to its original position when the functional unit 1R is pulled out.

[0022] Next, the features of the shutter mechanism 20 of the control center will be described. In the first embodiment, the shutter cover 8 is pressed against the spacer 11 attached to the bottom plate 13 of the functional unit 1, so there is no risk of the outer wall of the junction 2 being damaged and the internal live parts being exposed, eliminating the risk of earth faults and short circuit accidents. Also, the shutter cover 8 moves in response to the insertion and withdrawal of the functional unit 1 without direct human contact, enabling operation without the risk of people touching the live parts of the busbar 6.

[0023] Furthermore, by providing the test position protrusion 10 on the front protrusion 9 of the shutter cover 8, a catch can be felt when inserting or pulling out the functional unit 1 into the housing 3, making it easy to hold the functional unit 1 in the test position. In the comparative example, in order to hold the functional unit in the test position, it was necessary to provide a latch mechanism in addition to the shutter mechanism to stop it once at the test position. However, in the first embodiment, it is possible to accurately hold the functional unit in the test position using only the shutter mechanism, making it unnecessary to provide a latch mechanism.

[0024] As described above, according to the first embodiment, a shutter mechanism for a control center is obtained in which the shutter opens and closes in conjunction with the insertion and withdrawal of a functional unit.

[0025] Embodiment 2 In the second embodiment, two front protrusions and two spacers are provided.

[0026] The shutter mechanism of the control center in embodiment 2 will be explained, focusing on the differences from embodiment 1, based on Figure 12, which is an oblique view of the shutter mechanism of the functional unit of the control center, Figure 13, which is a bottom view of the functional unit of the control center, and Figures 14 and 15, which are cross-sectional top views when the functional unit is inserted into the control center housing. In the configuration diagram of the second embodiment, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals. In order to distinguish it from the first embodiment, the second embodiment includes a control center 200, a functional unit 1A, a control center shutter mechanism 20A, a shutter cover 8A, front protrusions 9A, 9B, test position protrusions 10A, 10B, and spacers 11A, 11B.

[0027] First, the configuration of the shutter mechanism 20A of the control center according to the second embodiment will be described with reference to Figures 12 and 13. Part C of Figure 13 is an enlarged view of the spacers 11A and 11B. In embodiment 2, as shown in Figure 12, the shutter cover 8A is structured to have front protrusions 9A, 9B on both ends, and two spacers 11A, 11B are attached to the bottom plate 13 of the functional unit 1A as shown in Figure 13 in order to press the two front protrusions 9A, 9B of the shutter cover 8A against each other when the functional unit 1A is inserted into the functional unit chamber 4.

[0028] Next, the operation of the shutter mechanism 20A of the control center 200 according to the second embodiment will be described with reference to FIGS. Figures 14 to 16 each show a cross-sectional view of functional unit 1A as viewed from above. Figure 14 shows the functional unit 1A in a position where spacers 11A and 11B come into contact with front protrusions 9A and 9B of shutter cover 8A when the functional unit 1A is inserted into the functional unit chamber 4. Figure 15 shows the functional unit 1A inserted up to the test position. Figure 16 shows the functional unit 1A inserted further, with the junction 2 of the functional unit 1A connected to the busbar 6.

[0029] Next, features of the shutter mechanism 20A of the control center 200 according to the second embodiment will be described. In the first embodiment, the front protrusion 9 of the shutter cover 8 that fits under the bottom of the functional unit 1 is provided only on one end, either the left or right. Therefore, when the shutter cover 8 operates, there is a possibility that the end where the front protrusion 9 is not provided may become loose. In the second embodiment, the front protrusions 9A and 9B of the shutter cover 8A that fits under the bottom of the functional unit 1A are provided on both the left and right ends. Therefore, there is no possibility that one end of the shutter cover 8A may become loose when the shutter cover 8A operates, and although the structure is a little more complicated than in the first embodiment, the shutter cover 8A can be opened and closed more smoothly.

[0030] Other than the above, it is the same as the first embodiment, and since the shutter cover 8A is pressed by the spacers 11A, 11B attached to the bottom plate 13 of the functional unit 1A, there is no risk of the outer wall of the junction 2 being damaged and the internal live parts being exposed, and the risk of earth faults and short circuit accidents can be eliminated. Also, since the front protrusions 9A, 9B of the shutter cover 8A are provided with the test position protrusions 10A, 10B, a catch can be felt when inserting or pulling out the functional unit 1A into the functional unit chamber 4, and therefore the functional unit 1A can be easily held in the test position.

[0031] As described above, according to the second embodiment, a shutter mechanism for a control center in which the shutter opens and closes in conjunction with the insertion and withdrawal of a functional unit can be obtained. Furthermore, the shutter cover can be opened and closed more smoothly.

[0032] Although the present application describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments are not limited to application to a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless modifications not exemplified are assumed within the scope of the technology disclosed in this application, including, for example, modifying, adding, or omitting at least one component, and further, extracting at least one component and combining it with a component of another embodiment. [Explanation of symbols]

[0033] 1,1A,1R functional unit, 2 junction, 3 control center housing, 4 functional unit room, 5 busbar room, 6 busbar, 7 partition plate, 8,8A,8R shutter cover, 9,9A,9B front protrusion, 10,10A,10B test position protrusion, 11,11A,11B spacer, 12 spring, 13 bottom plate, 14 busbar opening, 15 stopper, 20,20A control center shutter mechanism, 25 diagonal protrusion, 100,100R,200 control center.

Claims

1. A shutter mechanism for a control center, comprising a shutter cover attached to a partition plate separating a busbar room in which a busbar of the control center is arranged and a functional unit room in which a functional unit to be mounted in the control center is arranged, the shutter cover has a front protrusion protruding from its bottom toward the front, the functional unit has a spacer on its bottom, and when the functional unit is inserted into the functional unit chamber, the spacer on the functional unit presses against the front protrusion of the shutter cover, so that the shutter cover moves in conjunction with the insertion of the functional unit and opens, thereby enabling a connection between the busbar and the junction of the functional unit; The shutter cover has two front projections on both the left and right sides of the functional unit, two spacers are provided on the bottom surface of the functional unit corresponding to the two front protrusions; the front projection of the shutter cover is inserted under the bottom plate of the functional unit, and the surface of the functional unit that comes into contact with the spacer is inclined obliquely with respect to the functional unit; The shutter mechanism for a control center is provided with a structure in which, when the functional unit is inserted straight from the front side of the functional unit chamber, the shutter cover moves in a lateral direction perpendicular to the insertion direction of the functional unit.

2. A test position protrusion is provided on a side surface of the front protrusion of the shutter cover, 2. The shutter mechanism of a control center as described in claim 1, further comprising a structure in which the spacer provided on the functional unit comes into contact with the test position protrusion provided on the shutter cover when the functional unit is inserted or pulled out of the functional unit chamber, and is caught at the test position.

3. A shutter mechanism for a control center as described in claim 1 or claim 2, wherein the obliquely inclined surface of the front protrusion of the shutter cover that contacts the spacer of the functional unit is structured so that the shutter cover moves and continues to contact the spacer until the busbar is completely exposed.

4. 3. The shutter mechanism for a control center according to claim 1, wherein the spacer of the functional unit is circular and in a plane parallel to the front protrusion.

5. 5. The shutter mechanism of a control center according to claim 4, wherein said spacer of said functional unit is rotatable about a circular central axis of said spacer.

6. A shutter mechanism for a control center, comprising a shutter cover attached to a partition plate separating a busbar room in which a busbar of the control center is arranged and a functional unit room in which a functional unit to be mounted in the control center is arranged, the shutter cover has a front protrusion protruding from its bottom toward the front, the functional unit has a spacer on its bottom, and when the functional unit is inserted into the functional unit chamber, the spacer on the functional unit presses against the front protrusion of the shutter cover, so that the shutter cover moves in conjunction with the insertion of the functional unit and opens, thereby enabling a connection between the busbar and the junction of the functional unit; The shutter cover has two front projections on both the left and right sides of the functional unit, two spacers are provided on the bottom surface of the functional unit corresponding to the two front protrusions; A test position protrusion is provided on a side surface of the front protrusion of the shutter cover, a structure in which the spacer provided on the functional unit comes into contact with the test position protrusion provided on the shutter cover when the functional unit is inserted into or pulled out of the functional unit chamber, and the spacer is caught at a test position; The test position protrusion is a protrusion provided on a side surface of the front protrusion of the shutter cover in a direction that restricts movement of the functional unit in the insertion direction and the removal direction.

7. A shutter mechanism for a control center, comprising a shutter cover attached to a partition plate separating a busbar room in which a busbar of the control center is arranged and a functional unit room in which a functional unit to be mounted in the control center is arranged, the shutter cover has a front protrusion protruding from its bottom toward the front, the functional unit has a spacer on its bottom, and when the functional unit is inserted into the functional unit chamber, the spacer on the functional unit presses against the front protrusion of the shutter cover, so that the shutter cover moves in conjunction with the insertion of the functional unit and opens, thereby enabling a connection between the busbar and the junction of the functional unit; A test position protrusion is provided on a side surface of the front protrusion of the shutter cover, a structure in which the spacer provided on the functional unit comes into contact with the test position protrusion provided on the shutter cover when the functional unit is inserted into or pulled out of the functional unit chamber, and the spacer is caught at a test position; The test position protrusion is a protrusion provided on a side surface of the front protrusion of the shutter cover in a direction that restricts movement of the functional unit in the insertion direction and the removal direction.

Images