JP4581961B2 - Dummy unit - Google Patents

Description

  The present invention relates to a dummy unit that is coupled in place of a relay unit to a connection base in which a plurality of relay units are detachably coupled.

  Conventionally, as shown in FIG. 7, there is a relay device including a plurality of relay units 2 each including a relay and a connection base 3 to which these relay units 2 are detachably coupled. The coupled relay unit 2 and connection base 3 are held by a connection mounting plate 4 (see FIG. 4) described later. 7 includes a main frame 6 having a rectangular parallelepiped shape that is long in the vertical direction and a side frame 7 having a rectangular solid shape that is long in the left-right direction on the upper surface of the left end portion of the side frame 7. The frame 6 is formed in an L shape as a whole by continuously and integrally providing the lower end surface of the frame 6 so as to coincide with each other.

  The connection base 3 has a plurality of connection terminals 8 arranged in parallel on one surface (right side surface) of the main frame 6, and each relay unit 2 has a control terminal (not shown) provided on one surface of the case 9. They are coupled to the connection base 3 so as to abut each of the connection terminals 8. At this time, when the control terminal is connected to the connection terminal 8, the relay unit 2 and the connection base 3 are electrically connected. The plurality of connection terminals 8 are arranged in the vertical direction, and the relay unit 2 is coupled to the connection base 3 in the form of a plurality connected in the vertical direction. The connection base 3 shown in FIG. 7 is provided with eight connection terminals 8 so that a maximum of eight relay units 2 can be coupled simultaneously.

  The configuration of the connection mounting plate 4 will be described with reference to FIG. The connection mounting plate 4 has a main plate 31 disposed along the back surface of the relay unit and the connection base (the lower surface in FIG. 4). Further, the connection terminal 8 and the control terminal protrude from the relay unit 2 and the connection base 3. A plurality of sets of two mounting claws 12 that are elastically held by being sandwiched from both sides in the mating direction (left and right direction) are provided. Each of the relay unit 2 and the connection base 3 is provided with a fitting hole 13 into which the mounting claw 12 is fitted. The mounting claw 12 on the relay unit 2 side is made of a spring member having flexibility in the direction of widening the gap between the mounting claw 12 forming a pair, and the mounting claw 12 is fitted into the fitting hole 13 of the connection base 3. If the relay unit 2 is pressed to the main plate 31 side in the state where the relay unit 2 is pressed, the mounting claws 12 are fitted into the fitting holes 13 of the relay unit 2 and the attachment of the relay unit 2 and the connection base 3 to the connection mounting plate 4 is completed. . The relay device is fixed in the control panel by attaching the relay unit 2 and the connection base 3 in a state of being coupled to a connection mounting plate 4 mounted in the control panel installed on a wall surface, for example.

  By the way, in this type of relay device, when the number of relay units 2 that is less than the maximum number that can be coupled to the connection base 3 is used, an empty space is generated for the unused relay units 2 in the connection base 3. Become. In the example shown in FIG. 7, only six relay units are coupled to a maximum of eight relay units, and an empty space A corresponding to two relay units is generated. At this time, since some of the connection terminals 8 of the connection base 3 are exposed, dust or the like may adhere to the exposed connection terminals 8 when the relay device is used in this state.

On the other hand, a dummy unit (dummy breaker) that is attached to an empty space where a branch breaker in a distribution board is not attached is known as a device that is attached to an empty space that is generated when a device is not installed and protects a terminal ( For example, see Patent Document 1). Then, it is considered that this kind of technology is applied to the relay device, and a dust unit or the like is prevented from adhering to the connection terminal 8 by attaching a dummy unit covering the connection terminal 8 to the empty space A of the connection base 3. Yes.
JP 2003-189423 (page 2-3)

  However, the relay device is fixed by being attached to the connection mounting plate 4 in a state where the relay unit 2 and the connection base 3 are coupled to each other, whereas the dummy unit described in Patent Document 1 is a power distribution device. The relay unit 2 of the relay device and the dummy unit of Patent Document 1 have different structures for fixing. Therefore, even if the dummy unit described in Patent Document 1 is applied to the relay device, the attachment strength of the connection base 3 to the connection attachment plate 4 cannot be sufficiently ensured.

  The present invention has been made in view of the above reasons, and when the number of relay units to be used is less than the maximum number that can be coupled to the connection base, it is possible to increase the attachment strength of the connection base to the connection mounting plate. The purpose is to provide a dummy unit that can be used.

  According to the first aspect of the present invention, there is provided a connection base in which a plurality of connection terminals are arranged in one direction on one surface of the vessel body, and a control terminal is provided on one surface of the case so that the control terminal is brought into contact with each connection terminal. A plurality of relay units connected in the above-mentioned one direction and detachably coupled to the connection base, and elastically held by sandwiching the relay unit and the connection base from both sides in the direction in which the control terminal and the connection terminal face each other 2 Used in a relay device having an articulated mounting plate having a plurality of sets of mounting claws, and when the number of relay units coupled to the connection base is less than the maximum number that can be coupled to the connection base Instead of a relay unit, the unit main body has a unit main body that is detachably connected to the connection base so as to fill up all the empty space generated in the connection base. Engaging hooks of the relay unit side of each set of mounting nails as each elastic holding is characterized in that it comprises a fitting portion fitted with the platform.

  According to this configuration, when the number of relay units to be used is less than the maximum number that can be coupled to the connection base, a dummy is used instead of the relay unit with respect to the connection base so as to fill all empty spaces generated in the connection base. Units are combined. When the dummy unit is connected to the connection base, the relay unit side mounting claws are fitted into the fittings in the mounting claws of each set, so that the unit body is elastically held by the mounting bases together with the connection base. Will be. Therefore, when the dummy unit is combined so as to fill all the empty space on the connection base, the mounting strength of the connection base to the connection mounting plate is combined with the maximum number of relay units that can be connected to the connection base. Can be increased to the same level.

  According to a second aspect of the present invention, in the first aspect of the invention, the unit main body extends in the one direction by filling the empty space of the connection base from the main wall orthogonal to the one direction and the entire peripheral edge of the main wall. A peripheral wall extending in part and provided with the fitting portion in part, and the main wall is separated from the adjacent relay unit so as to have a gap with the adjacent relay unit when coupled to the connection base It is characterized by being formed at the position.

  According to this configuration, since the main wall has a gap between the adjacent relay units, the heat radiation generated in the adjacent relay unit is radiated as compared to the configuration in which the main wall is close to the adjacent relay unit. Efficiency will be improved.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the unit main body covers the entire end surface on the side away from the relay unit when coupled to the connection base among the both end surfaces in the one direction. And a cover wall covering.

  According to this configuration, the unit main body can prevent the dust from entering from the end face on the side away from the relay unit when coupled to the connection base by the lid wall, and thus can prevent dust from accumulating inside. .

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the unit main body is disposed so as to abut against the container body of the connection base and is coupled to the connection base. And a holding portion provided with a fitting portion provided at a distal end portion thereof so as to fill a space between the attachment claw and the coupling portion from one end portion on the side of the connection mounting plate in the coupling portion. Features.

  According to this configuration, the unit body is configured by the coupling portion and the holding portion, and the dummy unit is held in a state where the coupling portion is coupled to the connection base, while the material cost for manufacturing the dummy unit is kept low. The effect of Claim 1 that the attachment strength of the connection base to the articulating attachment plate can be enhanced by fitting the attachment claws into the fitting portion provided in the portion. In addition, since the dummy unit can have a different appearance from the relay unit by configuring the unit main body only with the coupling part and the holding part, the dummy unit and the relay unit that are coupled to the connection base can be easily provided. The number of relay units that can be further coupled to the connection base can be known from the number of dummy units coupled to the connection base.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the unit main body includes a terminal portion to which an electric wire can be connected.

  According to this structure, the empty space which arises by not connecting a relay unit to a connection stand can be utilized as a terminal block for electric wire connection.

  In the present invention, when the number of relay units to be used is less than the maximum number that can be coupled to the connection base, a dummy unit is used instead of the relay unit for the connection base so as to fill all empty spaces generated in the connection base. Combined. When the dummy unit is connected to the connection base, the relay unit side mounting claws are fitted into the fittings in the mounting claws of each set, so that the unit body is elastically held by the mounting bases together with the connection base. Will be. Therefore, when the dummy unit is combined so as to fill all the empty space on the connection base, the mounting strength of the connection base to the connection mounting plate is combined with the maximum number of relay units that can be connected to the connection base. There is an advantage that it can be increased to the same level.

  First, the basic configuration of the relay device exemplified in this embodiment will be described with reference to FIGS. 1 and 4. In the following, description will be made assuming that the upper, lower, left, and right in FIG.

  This relay device includes a monitoring terminal device including a switch and a control terminal device to which a relay for turning on / off a load is connected as a terminal device, and a centralized control system (remote monitoring control system) including a transmission unit as a center device. ). The transmission unit, the monitoring terminal, and the control terminal are connected to a two-wire signal line, and the transmission unit uses the addresses set in the monitoring terminal and the control terminal to transmit the monitoring terminal and the control terminal. Recognize separately. In this remote monitoring control system, the transmission unit receives a transmission signal including on / off information of a switch in the monitoring terminal, and opens and closes the relay by the transmission signal.

  The relay device includes a parent device having a transmission unit function among components of a remote monitoring control system, and a child device having a control terminal function without providing a transmission unit function. As shown in FIG. 1 or FIG. 4, the relay device has a plurality of relay units 2 each having a relay, as in the relay device shown in FIG. The relay unit 2 includes a connection base 3 to which the relay unit 2 is detachably coupled, and the relay unit 2 and the connection base 3 in a coupled state are held by a connection mounting plate 4 (see FIG. 4).

  Here, the connection base 3 of the master unit has a function of a transmission unit, whereas the connection base 3 of the slave unit has a function of a control terminal. That is, since the master unit has a built-in function of the transmission unit, by connecting the monitor terminal using a two-wire signal line, the switch provided in the monitor terminal is operated by the relay provided in the master unit. This can be reflected in the relay of unit 2 on / off. Therefore, when constructing a small-scale remote monitoring control system in which the number of circuits to which the load is connected falls within the range of the number of relay units 2 that can be coupled to the connection base 3 of the master unit, the relay unit 2 of the master unit is constructed. A remote monitoring and control system can be constructed by directly connecting a load to the network. Here, since the master unit does not have a function as a control terminal, the relay unit 2 of the master unit is controlled by internal processing of the master unit without using a transmission signal. However, an address is assigned to each connection terminal of the connection base 3 so that the relay unit 2 of the master unit can be handled equivalently to the relay unit 2 of the slave unit. On the other hand, since the slave unit has the function of a control terminal, if the slave unit is connected using a two-wire signal line to the master unit connected to the monitoring terminal using a two-wire signal line, The operation of the switch provided in the monitoring terminal can be reflected in the relay of the relay unit 2 provided in the slave unit.

  The relay device shown in FIG. 1 is a parent device, and the device body 5 of the connection base 3 has a rectangular parallelepiped main frame 6 that is long in the vertical direction and the left-right direction in the same manner as the relay device shown in FIG. In addition, a long rectangular parallelepiped side frame 7 is integrally formed to form an L shape as a whole. On the other hand, the relay device shown in FIG. 4 is a slave unit, and the body of the connection base is formed in a shape including only the main frame, omitting a portion corresponding to the side frame of the master unit. Each of the master unit and the slave unit has a plurality of connection terminals 8 (see FIG. 7) arranged in the vertical direction on the right side of the main frame 6, and each relay unit 2 is provided on the left side of the case 9. The control terminal (not shown) is coupled to the connection base 3 so as to abut each connection terminal 8.

  Further, as shown in FIG. 1, the relay unit 2 includes a load terminal 10 connected to a contact of the relay separately from the control terminal described above, and the load terminal 10 is exposed at the right end of the front surface of the case 9. Let The load terminal 10 is a screwed terminal to which a load (not shown) and a power source (not shown) are connected. Each relay unit 2 is provided with four sets of four load terminals 10, an insulating wall 11 for insulation is disposed between the pair of load terminals 10, and the load terminals 10 of each set are in the front-rear direction. Are arranged in steps so as to be arranged at different positions. A fitting hole 13 into which the attachment claw 12 (see FIG. 4) of the connection attachment plate 4 is fitted is formed on the right side surface of the case 9 behind the load terminal 10.

  By the way, in this embodiment, it is premised that the number of relay units 2 used in the relay device is less than the maximum number that can be coupled to the connection base 3. A dummy unit 1 is detachably coupled in place of the unit 2.

  Each dummy unit 1 shown in FIG. 1 has an outer shape of the unit body that is substantially the same size as that of one relay unit 2, and is coupled to the connection base 3 so as to fill all empty spaces in the connection base 3. . Here, the relay unit 2 is coupled to the space for 6 pieces from the bottom (side frame side) with respect to the connection base 3 to which a maximum of 8 relay units 2 can be coupled. The dummy unit 1 is coupled.

  Each dummy unit 1 is made of a synthetic resin material, and as shown in FIG. 2, a plate-shaped main wall 14 formed in the shape and dimensions substantially the same as the outer peripheral shape of the relay unit 2 viewed from above or below, A peripheral wall 15 extending continuously from the entire periphery of the main wall 14 to both sides in the thickness direction (vertical direction) of the main wall 14 is provided continuously. The peripheral wall 15 is formed to have substantially the same width dimension (vertical dimension) as each relay unit 2. A plurality of reinforcing ribs 16 that reinforce the peripheral wall 15 protrude from the inner peripheral surface of the peripheral wall 15.

  At the position corresponding to the control terminal of the relay unit 2 on the left side surface of the peripheral wall 15, a U-shaped terminal protection portion 17 opened downward is erected. When the dummy unit 1 is coupled to the connection base 3, the connection terminal 8 of the connection base 3 is inserted into a portion surrounded by the terminal protection part 17, thereby preventing adhesion of dust or the like to the connection terminal 8. The connection terminal 8 is protected. Further, in the present embodiment, a fitting rib 18 (see FIG. 7) is erected around the connection terminal 8 of the connection base 3, and the terminal protection portion 17 is provided when the dummy unit 1 is coupled to the connection base 3. The fitting rib 18 is concavo-convexly fitted.

  Further, a hooking protrusion 19 protruding forward is provided on the front surface of the front wall of the terminal protection part 17, and the hooking protrusion 19 protrudes from the left end part of the terminal protection part 17 so as to have a gap between the peripheral wall 15. To do. Further, the rear surface of the peripheral wall 15 is formed such that the left end portion is recessed as a contact surface 20, and a protruding strip 21 extending in the vertical direction protrudes from a part of the contact surface 20. . On the other hand, the connection base 3 is provided with a hooking portion (not shown) capable of hooking the hooking protrusion 19 when the dummy unit 1 is attached, and is in contact with the contact surface 20 in a state where the dummy unit 1 is coupled. A holding piece 22 (see FIG. 7) protruding rightward from the rear end edge of the right side surface of the main frame 6 is provided over the entire vertical direction. The holding piece 22 is provided with an engagement hole 23 (see FIG. 7) through which the protruding piece 21 of the dummy unit 1 engages. According to this configuration, when the dummy unit 1 is attached to the connection base 3, the contact portion between the hook protrusion 19 and the hook portion is set with the hook protrusion 19 of the dummy unit 1 hooked on the hook portion of the connection base 3. By rotating the dummy unit 1 as a fulcrum so that the contact surface 20 of the dummy unit 1 rides on the holding piece 22 of the connection base 3, the protruding strip piece 21 engages with the engagement hole 23 and the dummy unit 1. And the connection base 3 are combined.

  Here, the hooking portion and the engagement hole 23 provided in the connection base 3 are originally provided for coupling the relay unit 2 to the connection base 3, and although not shown, the relay unit 2 also has a hooking projection. 19 and the ridge piece 21 are provided.

  By the way, the dummy unit 1 is provided with a fitting hole 24 as a fitting portion into which the mounting claw of the connecting mounting plate 4 is fitted, similarly to the relay unit 2. The fitting hole 24 is recessed in the rear end portion of the right side surface of the peripheral wall 15. Thus, by providing the fitting hole 24 in the dummy unit 1, even when the dummy unit 1 is coupled to the connection base 3 instead of the relay unit 2, the connection base 3 is connected to each pair together with the dummy unit 2. Are held between the attachment claws 12 and elastically held by the connection attachment plate 4. That is, as shown in FIG. 1, when 6 relay units 2 and 2 dummy units 1 are coupled to a connection base 3 capable of coupling a maximum of 8 relay units 2, the connecting mounting plate The attachment strength of the connection base 3 with respect to 4 is approximately the same as the case where eight relay units 2 that are the maximum number that can be connected to the connection base 3 are combined. In the illustrated dummy unit 1, the fitting hole 24 is opened upward.

  Furthermore, in the dummy unit 1 of the present embodiment, as shown in FIG. 2, the positional relationship between the main wall 14 and the peripheral wall 15 is set so that the main wall 14 is positioned near the center in the width direction of the peripheral wall 15. . Thus, a gap is formed between the main wall 14 of the dummy unit 1 and the relay unit 2 adjacent to the dummy unit 1 in a state where the dummy unit 1 is coupled to the connection base 3 together with the relay unit 2. As a result, there is an advantage that even if the dummy unit 1 is used, it is difficult to prevent the heat generated in the relay unit 2 from being radiated. However, in order to have a gap between the adjacent relay unit 2 and the main wall 14, the configuration is not limited to the configuration in which the main wall 14 is disposed near the center in the width direction of the peripheral wall 15. What is necessary is just the structure which arrange | positions the main wall 14 in the position away from 2. FIG. Thereby, compared with the case where the main wall 14 adjoins with respect to the adjacent relay unit 2, the thermal radiation efficiency of the heat | fever which generate | occur | produces in the said relay unit 2 improves.

  However, if the main wall is disposed near the center in the width direction of the peripheral wall 15 as described above, the peripheral wall 15 rises on both sides of the main wall 14 in the thickness direction. When dust enters the internal space surrounded by the main wall 14 and the peripheral wall 15 from the end surface not adjacent to the relay unit 2 when coupled to the base 3, dust may accumulate in the internal space. In particular, in the relay device installed in the direction in which the relay units 2 are arranged in the vertical direction as in the present embodiment, dust accumulation is significant in the dummy unit 1 attached to the uppermost stage. Therefore, as shown in FIG. 3, it is desirable to provide the dummy unit 1 with a lid wall 25 that covers an end surface (here, the upper end surface) on the side that is not adjacent to the relay unit 2 in a state of being coupled to the connection base 3. The lid wall 25 may be configured to be detachably coupled to the peripheral wall 15 as shown in FIG. 3A, but is formed integrally with the peripheral wall 15 as shown in FIG. It may be. In the case where the peripheral wall 15 and the cover wall 25 are configured to be integrated continuously, the main wall 14 can be used as the cover wall 25 by forming the main wall 14 at the upper end of the peripheral wall 15.

  Further, as shown in FIG. 4, a dummy unit 1 having an outer shape different from that of the relay unit 2 may be employed. Here, an example is shown in which three relay units 2 and one dummy unit 1 are coupled to a connection base 3 to which a maximum of four relay units 2 can be coupled. The dummy unit 1 shown in FIG. 4 has a coupling portion 26 that is disposed so as to abut against the right side surface of the main frame 6 of the connection base 3, and a shape that projects rightward from the rear end portion of the right side surface of the coupling portion 26. And a holding portion 27. The coupling portion 26 and the holding portion 27 are formed continuously and integrally. The dummy unit 1 in FIG. 4 includes a main wall 14 and a peripheral wall 15 in the same manner as the dummy unit 1 shown in FIGS. 1 to 3, but the shape of the main wall 14 is different from that in FIGS. Differently, a portion corresponding to the coupling portion 26 and a portion corresponding to the holding portion 27 are formed in an L shape, and the peripheral wall 15 is also formed in accordance with the shape of the main wall 14.

  Here, the terminal protection portion 17 is provided on the left side surface of the coupling portion 26 in the same manner as the dummy unit 1 described above. That is, the coupling portion 26 can be coupled to the connection base 3 by fitting the terminal protection portion 17 and the fitting rib 18 of the connection base 3 to be uneven. Further, a hooking projection 19 is formed on the terminal protection portion 17, and a protruding strip 21 is also provided on the rear surface of the coupling portion 26 (not shown). Further, a fitting hole 24 as a fitting portion is formed in the right end portion of the holding portion 27. Therefore, even the dummy unit 1 shown in FIG. 4 is coupled to the connection base 3 and held on the connection mounting plate 4 together with the connection base 3 in the same manner as the dummy unit 1 described above.

  In this way, the dummy unit 1 composed of the coupling portion 26 and the holding portion 27 is composed of only a necessary portion as the dummy unit 1, and is formed in substantially the same outer shape as the relay unit 2. Even though the material cost for manufacturing can be kept lower than that of the dummy unit 1, the dummy unit 1 functions sufficiently. In addition, if the outer shapes of the dummy unit 1 and the relay unit 2 are different, the dummy unit 1 and the relay unit 2 coupled to the connection base 3 can be easily distinguished from each other and are coupled to the connection base 3. From the number of dummy units 1, the number of relay units 2 that can be added to the connection base 3 can be known.

  Furthermore, as shown in FIG. 5, you may employ | adopt the dummy unit 1 which provided the terminal part 28 which can connect an electric wire. The terminal portion 28 is provided at a right end portion of the front surface of the peripheral wall 15, that is, a portion corresponding to the load terminal 10 of the relay unit 2. The terminal portion 28 is a threaded terminal similar to the load terminal 10, and a pair of terminal portions 28 are arranged via an insulating wall 29 for insulation, so that a total of two sets of terminal portions 28 are located at different positions in the front-rear direction. It is arranged in a staircase shape so as to be arranged. Here, wiring members 30 are provided for electrically connecting the terminals 28 of each group, and the dummy unit 1 can be used for a load feed wiring that is turned on and off by the relay unit 2.

  By the way, the relay device of the present embodiment is defined in the JIS standard as a so-called distribution board agreement dimension (a standard for a circuit breaker for an electric distribution board) in a state where the relay unit 2 is coupled to the connection base 3. The dimensions of the connection base 3 and the relay unit 2 are set so as to be (dimension). The width dimension (vertical dimension) of one relay unit 2 is the dimension of one piece of a single circuit breaker for an agreement distribution wiring for a lamp distribution board (hereinafter referred to as a circuit breaker). The width dimension of the side frame 7 is equal to the width dimension of two relay units 2. Therefore, in the master unit, the dimensions corresponding to ten single-pole circuit breakers are obtained with eight relay units 2 coupled, and in the slave unit, four relay units 2 are coupled. The size is equivalent to four single-pole circuit breakers. In these relay devices, even if the dummy unit 1 is coupled to the connection base 3 in place of the relay unit 2, the dimensions described above (the dimensions corresponding to 10 single-pole circuit breakers in the master unit, slave units) Then, it does not change to the dimension corresponding to four single-pole circuit breakers. In the master unit, the two sets of mounting claws 12 on the lower side of the connecting mounting plate 4 are used to sandwich the side frame 7.

  In the present embodiment, the dummy unit 1 having a size corresponding to one of the relay units 2 is illustrated. However, as shown in FIG. 6, the dummy unit 1 having a size corresponding to two of the relay units 2 (two Dummy unit 1 with dimensions corresponding to a plurality of relay units 2, such as a dummy unit 1 with dimensions corresponding to four relay units 2 (referred to as four dummy units). May be. Two terminal protection portions 17, protruding strips 21, and fitting holes 24 are formed in the two dummy units 1, and four in the four dummy units. By using the dummy unit 1 having a size corresponding to a plurality of relay units 2 in this way, even if a space for a plurality of relay units 2 is generated on the connection base 3, one dummy unit 1 is sufficient. The number of parts constituting the relay device can be reduced. That is, for example, when the dummy unit 1 is used instead of the two relay units 2 as shown in FIG. 1, one dummy unit 1 is sufficient if two dummy units 1 are used. As compared with the example of FIG. 1 using two dummy units 1, the number of parts constituting the relay device is reduced.

The example which couple | bonded the dummy unit of embodiment of this invention with the connection stand is shown, (a) is a perspective view, (b) is a front view. The structure of the dummy unit is shown, (a) is a perspective view seen from below, (b) is a perspective view seen from above, (c) is a front view, (d) is a bottom view, and (e) is a side view. (F) is a rear view, (g) is an AA sectional view of (d). The structure of a dummy unit same as the above is shown, (a) is a perspective view of an example employing a detachable lid wall on the peripheral wall, and (b) is a perspective view of an example employing a lid wall formed integrally with the peripheral wall. is there. The dummy unit of the other structure same as the above is shown, (a) is a perspective view in a state of being coupled to a connection base, and (b) is a perspective view in an unmounted state. It is a perspective view which shows the dummy unit of other structure same as the above. (A) is a perspective view which shows two dummy units same as the above, (b) is a perspective view which shows four dummy units same as the above. A prior art example is shown, (a) is a perspective view, (b) is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dummy unit 2 Relay unit 3 Connection stand 4 Connection mounting plate 5 Body 8 Connection terminal 9 Case 12 Mounting claw 14 Main wall 15 Perimeter wall 24 Fitting hole (fitting part)
25 Lid wall 26 Coupling part 27 Holding part 28 Terminal part

Claims (5)

  A connection base in which a plurality of connection terminals are arranged in one direction on one surface of the container, and a control terminal on one surface of the case. A relay unit that is connected individually and is detachably coupled to a connection base, and a set of two mounting claws that elastically hold the relay unit and the connection base from both sides in the direction in which the control terminal and the connection terminal abut each other. Used in relay devices with multiple sets of connecting mounting plates, and fills all empty spaces in the connection base when the number of relay units coupled to the connection base is less than the maximum number that can be coupled to the connection base The unit main body is detachably coupled to the connection base instead of the relay unit, and the unit main body is elastic together with the connection base by each set of mounting claws when coupled to the connection base. The dummy unit engaging hooks of the relay unit side of each pair of mounting pawls to be retained is characterized in that it comprises a fitting portion to be fitted.   The unit main body extends in the one direction so as to fill the empty space of the connection base from the main wall orthogonal to the one direction and the entire periphery of the main wall, and the fitting portion is provided in part. The main wall is formed at a position spaced from the adjacent relay unit so as to have a gap between the main wall and the adjacent relay unit when coupled to the connection base. 1. A dummy unit according to 1.   The said unit main body is provided with the cover wall which covers the end surface of the side which leaves | separates from the said relay unit at the time of the coupling | bonding to the said connection stand among the both end surfaces of the said one direction over the whole surface. The dummy unit described.   The unit main body is arranged so as to be abutted against the container body of the connection base and is connected to the connection base, and the attachment claw and the connection part from one end of the connection portion on the side of the connection mounting plate. The dummy unit according to any one of claims 1 to 3, wherein the dummy unit is configured by a holding portion that is provided in a projecting manner so as to fill the gap and is provided with the fitting portion at a tip end portion thereof.   The dummy unit according to any one of claims 1 to 4, wherein the unit main body includes a terminal portion to which an electric wire can be connected.

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