JPH0734513B2 - Solid relay - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid state relay that controls the opening and closing of a load with a power semiconductor element such as a thyristor or a triac.

<Prior art and its problems> Generally, in a solid state relay, an input circuit, a trigger circuit,
A power semiconductor device for load switching, such as a triac,
It is roughly classified into a surge absorbing absorber circuit including a varistor and a capacitor, and it is necessary to adopt a heat dissipation structure for effectively dissipating the heat generated by the power semiconductor element. On the other hand, the power semiconductor element is easily destroyed by a short circuit accident or an abnormal temperature rise, and the element of the absorber circuit is inevitably deteriorated with time. Therefore, when the power semiconductor element fails, Replacing the absorber circuit together with the semiconductor element is important in terms of enhancing reliability.

However, in the conventional type, since the absorber circuit is mounted together with other circuits on the same wiring board, for example, if the user wants to replace the absorber circuit, the entire circuit including the input circuit must be replaced, which is uneconomical. It was. In addition, even in the replacement work, it is troublesome to remove all the wiring, and if the rewiring work at the time of maintenance is not paid enough attention, the wiring may be erroneously performed.

<Purpose of the Invention> The present invention has been made in order to solve the problems of the above-mentioned conventional ones, and at least a power semiconductor element and a power circuit having an absorber circuit can be integrated and replaced, which is economical, and further, for maintenance. Assembling workability can be improved,
Moreover, it is an object of the present invention to provide a solid state relay having a good heat dissipation effect.

<Structure and Effect of the Invention> In the solid state relay according to the present invention, a control circuit block having a pair of input terminals and load terminals is mounted on the front surface of the base of the radiator in which the mounting device is mounted on the tip of the fin portion. The relay main body is configured with the radiator, and the power circuit cartridge having at least a power semiconductor element that is driven and controlled by the control circuit to open and close a load and an absorber circuit inserted between a pair of load terminals is provided in the relay main body. A solid-state relay that is detachably attached to the side and electrically connectable to the control circuit block from the front side of the block corresponding to the substantially central portion of the front surface of the base of the radiator. A through portion is provided that penetrates to the front surface of the base of the radiator, and the power circuit cartridge is fitted into the through portion so that the heat radiating plate in the power circuit cartridge is placed above. It is designed to be joined to the substantially central portion of the front surface of the base.

According to this invention, since the power circuit cartridge containing at least the power semiconductor element and the absorber circuit can be attached to and detached from the relay body side, the power semiconductor element is destroyed or the parts of the absorber circuit are deteriorated. For example, if the above power circuit cartridge is replaced, other circuits can be used as they are, it is economical, and wiring work is unnecessary and maintenance work can be performed easily. Especially, the heat dissipation plate in the power circuit cartridge is the front surface of the radiator base. Since it is bonded to substantially the center of the heat dissipation, the heat dissipation can be improved, and the assembling property of the power circuit cartridge can be improved by the guiding action of the penetrating portion.

<Description of Embodiments> An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are a perspective view and an electric circuit block diagram showing an example of a solid state relay according to the present invention, respectively.

In the figure, 1 is a relay body, 2 is a power circuit cartridge, 3 is a radiator having a fin portion 3a, and 4 is a fin portion.
It is a mounting device mounted on the tip side of 3a. Relay body 1
Is a control circuit block 10 having a pair of input terminals 5 ₁ and 5 ₂ and load terminals 6 ₁ and 6 ₂ and having a control circuit 9 composed of an input circuit 7 and a trigger circuit 8 and the radiator 3 described above. And the control circuit block 10 is the front of the base 3b of the radiator 3.
It is installed on the 3c side. The power circuit cartridge 2 is
A power semiconductor element that is driven by the trigger circuit 8 to open and close a load (not shown), for example, a power circuit 13 having a triac 11 and an absorber circuit 12 for absorbing surge is built in and detachable from the relay body 1 side. It is designed so that it can be electrically connected. The solid relay will be described in detail below. FIG. 3 is an exploded perspective view of the solid-state relay.

In the figure, 21 is a base made of an insulating synthetic resin in the control circuit block 10 described above, and has a rectangular bottom wall portion 21a.
Has an opening 22 formed substantially at the center thereof, a standing wall 21b is formed at one end in the width direction (horizontal direction), and nut holding portions 23 ₁ , 24 ₁ and 23 ₂ , at both ends in the longitudinal direction (vertical direction). 24 ₂
Are formed respectively. 25 ₁ and 25 ₂ are nuts for load terminals fitted in the nut holding parts 23 ₁ and 23 ₂ , respectively, and 26
Numerals ₁ and 26 ₂ are nuts for cartridges which are fitted into the nut holding portions 24 ₁ and 24 ₂ , respectively.

Reference numeral 27 is a printed wiring board arranged on the bottom wall portion 21a of the base 21, on which the constituent elements 28 of the control circuit 9 and the light emitting elements 29 for operation display are mounted as shown in FIG. An opening 30 is formed corresponding to the base 21 side. The input terminals 5 ₁ and 5 ₂ are made of U-shaped metal fittings, fixed to predetermined positions on the printed wiring board 27 with solder or the like and electrically connected to the input circuit 7. 31 _1, 31 ₂ each of the above respective input terminals 5 _1, 5 _2, respectively formed screw holes, 3
2 _1, 32 ₂ is the screw hole 31 _1, 31 ₂ to the washer 33 _1, 33 ₂ input terminal screw which is screwed through. At both ends of the printed wiring board 27 in the longitudinal direction, a pair of trigger signal terminal plates 34 ₁ , 3 made of a thin metal plate for obtaining a trigger signal for the triac 11 from the load line, respectively.
4 _{2 2} are electrically connected and fixed by soldering, and each terminal plate 34
₁ , 34 ₂ are holes 35 corresponding to the nuts 25 ₁ , 25 ₂ for the load terminals.
_1, 35 ₂ are formed respectively.

The load terminals 6 _1, 6 ₂ are mounted on the terminal plate 34 _1, 34 _2, insertion holes 37 ₁ a load terminal screw 36 _1, 36 _2, 37 ₂ are formed, further the Toraiatsuku 11 T ₁ and T ₂ terminal connecting pieces 38 ₁ and 38 ₂ are integrally formed. 39 ₁ , 3
9 ₂ is a hook piece connected to the load terminals 6 ₁ and 6 ₂ toward the base 1 side (rear side).
The protrusions 40 ₁ and 40 ₂ on the outer side surfaces of ₁ and 23 ₂ are engaged with each other. 41 ₁ and 41 ₂ are screw insertion holes formed in each of the terminal pieces 38 ₁ and 38 ₂ , and 42 ₁ and 42 ₂ are load terminal washers.

43 ₁ and 43 ₂ are lead wires 4 to the above input terminals 5 ₁ and 5 ₂ respectively.
4 _1, 44 ₂ a linking terminal pieces that are electrically connected via the respective vertical wall 21b of the base 1 as the shaft hole 45 _1, 45 ₂ formed on the base end Figure 4 It is rotatably fitted to the support pins 46 ₁ and 46 ₂ formed on the base plate. When a plurality of solid state relays are used in a row, the control circuit block 10 is projected so that it can be stored from the side surface in the width direction. It is configured so that it can be connected to the input terminals of adjacent ones. 47 is a socket for gate signal of the triac 11, is fitted into the cutout portion 48 of the printed wiring board 27, a connecting piece 47a coupled to one end side by soldering to the printed wiring board 27 side. The connection is fixed (see Fig. 4).

Reference numeral 49 is a substantially box-shaped case made of synthetic resin with an open rear end that is fitted onto the base 1, and communicates from the front side of the case 49 to the rear side in the central portion corresponding to the openings 22 and 30. Opening 22,3
A hollow portion 50 forming the penetrating portion 200 is formed together with 0, whereby the control circuit block 10 has a substantially square shape. Further, in the case 49, the input terminal exposure windows 51 ₁ , 51 ₂
Load terminal exposed windows 52 ₁ and 52 ₂ , operation display window 53, and connecting / disconnecting holes 54 ₁ and 54 ₂ (FIG. 4) of connecting terminal pieces 43 ₁ and 43 ₂ are formed. Further, on the inner surfaces of both side walls 49a, 49b in the width direction of the case 49, engaging grooves 55, 55 are formed on both side surfaces in the width direction of the base 3b of the radiator 3 along the longitudinal direction.
Engaging projections 56, 56 that engage with are formed. As shown in FIGS. 4 to 6, recessed portions 57, 57 are formed in the central portions of the both side walls 49a, 49b along the front-rear direction.

Reference numerals 58, 59 and 60 denote the T ₁ terminal, T ₂ terminal and gate terminal of the triac 11 in the power circuit cartridge 2 respectively, and the triac 11 formed in a thin plate shape.
As it is shown in Figure No. 7 (A), (B) , and the T ₁ terminal 58
It is sandwiched between the T ₂ terminal 59 and the T-shaped terminal 59, and is joined and fixed with solder or the like. The areas of the T ₁ and T ₂ terminals 58 and 59 are set wide in order to reduce the thermal resistance against the heat generated by the triac 11. Reference numeral 61 denotes a square small groove formed so as to surround the element setting surface of the T ₂ terminal 59, and is for preventing unnecessary outflow of solder. Reference numeral 62 denotes a gate line soldered to the gate of the triac 11, which is connected to the gate terminal 60 by soldering. 6
3, 64 are the outer end portions 58 of the T ₁ and T ₂ terminals 58, 59, respectively.
It is a screw insertion hole formed in a and 59a. The T ₂ terminal 59 is formed with a projecting hole 65 extending forward as shown in FIG. 7 (A), and the tip bending surface of the projecting piece 65 indicates the temperature of the triac 11. Thermo label 66 is attached.

Reference numeral 67 is a heat dissipation plate for transmitting the heat generated by the triac 11 to the heat radiator 3, and screw insertion holes 68 ₁ and 68 ₂ are formed in the projecting pieces 67a and 67b at diagonal positions, respectively. 69 is a heat sink 67
And an insulating plate interposed between the T ₂ terminal 59 is for ensuring insulation between the Toraiatsuku 11 and the heat radiating plate 67, the region corresponding to the T ₂ terminal 59 metallizing Has been done.

70 is a case in the power circuit cartridge 2
The rear surface side is made up of two split cases 71a, 71b, and the split projections 71a, 71b are fitted at their butt ends with a fitting projection 72 and a fitting projection 72 to be fitted by a sliding operation from the front-rear direction as shown in FIG. A mating groove portion 73 is formed, and the radiator plate 67 is joined to the rear end side as shown in FIG. 9 in a state where the two divided cases 71a and 71b are joined. In the cartridge case 70, the cartridge mounting screws 7 corresponding to the screw insertion holes 68 ₁ and 68 ₂ are attached.
The holding holes 76 ₁ and 76 _{2 of} 5 ₁ and 75 ₂ are formed, and the above-mentioned T ₁
And the T ₂ terminals 58, 59 outer end portions 58a, 59a of the outer space 77 ₁ , 7
7 ₂ are formed. Reference numerals 78 ₁ and 78 ₂ are screw holes formed in the front surface 3c of the base portion 3b of the radiator 3 into which the mounting screws 75 ₁ and 75 ₂ are screwed. Corresponding to the gate signal socket 47, a lead piece 60a formed on the gate terminal 60 and projecting rearward is press-fitted into one of the divided cases 71a, as shown in FIG. Terminal holder 7
9 is formed so that it can be accurately positioned with respect to the socket 47. The triac 11 housed in the cartridge case 70 is covered with silicone rubber 80 as shown in FIG. 9 in order to make it less susceptible to the influence of outside air and foreign matter.

81 is a printed wiring board for setting the absorber circuit,
A high voltage chip varistor 82, a chip capacitor 83, etc. are mounted, and a pair of absorber terminals 84 ₁ , 84 ₂ electrically connected to the T ₁ and T ₂ terminals 58, 59 are mounted as shown in FIG. Has been. 85 ₁ , 85 ₂ are screw insertion holes formed in the terminals 84 ₁ , 84 ₂ and 86 ₁ , 86 ₂ are the absorber terminals 84 ₁ , 84 ₂ and the T ₁ and T ₂ terminals 58, 59 respectively on the load terminal side. Is a connecting screw on the absorber side for connecting to the terminal connecting pieces 38 ₁ and 38 ₂ of the cartridge connecting nuts 26 ₁ and 26 ₂ described above. 87 ₁ and 87 ₂ are washers.

Reference numeral 88 denotes a synthetic resin cartridge cover fitted to the front side of the cartridge case 70, and an elastic engaging piece 90 engaging with an engaging recess 89 on the cartridge case 70 side is projected. The front side of the transparent window 91 of the thermo label 66 (10th
Figure) has been formed. 92 is the above cartridge cover 88
The locking protrusion on the side of the cartridge case 70 side
The engaging hole portion engages with 93. 94a and 94b are stoppers formed on both sides in the width direction of the cartridge storage cover 88, and when they are inserted into the hollow portion 50 of the case 49, the case 49
It is set so as to come into contact with the side. Reference numerals 95 ₁ and 95 ₂ are operation windows for the absorber-side connection screws 86 ₁ and 86 ₂ formed on the front surface of the cartridge cover 88. Further, as shown in FIG. 10, a terminal pressing piece is provided on the inner surface of the cartridge lip cover 88.
96 ₁ and 96 ₂ are projected rearward.

Reference numeral 97 denotes a connecting piece portion that integrally connects the tip ends of the fin portions 3a of the radiator 3 and is formed by drawing the radiator 3. A rib wall 9 extending in the longitudinal direction is formed on the connecting piece portion 97 located at both ends of the radiator 3 in the width direction.
9 ₁ and 99 ₂ are formed so as to face each other. Grooves 100 ₁ and 100 for fitting the widthwise ends 98a and 98b of the mounting substrate 98 into the facing surfaces of both rib walls 99 ₁ and 99 ₂ , respectively. ₂ is formed when the radiator 3 is formed by drawing.

The mounting board 98 is formed by press-molding a substantially rectangular metal plate, and is mounted on both ends in the longitudinal direction by screwing to the control panel (not shown) or the like.
1,102 are projected integrally. 103 is a fixing piece protruding from one end in the longitudinal direction of the mounting board 98 and caulked to one end face side of the connecting piece portion 97, which functions as a stopper for preventing one side of the mounting board 98 in the longitudinal direction. There is. Reference numeral 104 denotes a restricting piece that is bent forward from the other end of the mounting board 98 in the longitudinal direction, that is, formed toward the radiator 3 side, and abuts against the other end surface of the connecting piece portion 97 in the longitudinal direction of the mounting board 98. It functions as a stopper to the other.

A pair of standing wall pieces 10 located on one end 98c side in the longitudinal direction of the mounting board 98 and standing upright from the mounting board surface on both sides in the width direction.
5 ₁ and 105 ₂ are bent and formed, and each standing wall piece 105 ₁ and 105 ₂ is bent.
As shown in FIG. 5 and FIG.
A fitting groove 107 into which one of the rail piece portions 106a is fitted and a supporting protrusion 108 for supporting the rail piece portion 106a so as to be separated from the rib walls 99 ₁ and 99 ₂ are formed.

The other end 98d side in the longitudinal direction of the mounting substrate 98 is formed in a stepped shape, and a cutout hole 109 is formed in the stepped portion 98e. Reference numeral 110 denotes a feature rail formed of a metal plate in a substantially U-shaped cross section, which is arranged in the space between the other end 98d and the connecting piece 97 and has a mounting board 98.
Of the rail member 106 is integrally formed on one end side thereof so as to project from the notch hole 109 and fit into the other rail piece portion 106b of the rail member 106. There is.

111 is formed on the above-mentioned fixture rail 110 and is formed on the above-mentioned restriction piece.
It is a long hole penetrating 104, and this long hole 111 and the above-mentioned restriction piece
104 and the guide rail 110 guide the movement of the rail 110. Reference numeral 112 denotes a coil spring interposed between the spring seat piece 113 bent and formed on the feature rail 110 and the regulation piece 104, and imparts a spring force in the advancing direction (arrow a direction) to the feature rail 110. is doing. 11
Reference numeral 4 denotes an operation piece for releasing the fitting, which is bent to the other end side of the flexible rail 110, and 115 denotes the cutout hole 1 in the mounting substrate 98.
The support piece is formed on the inner wall of 09 and supports the other rail piece portion 106b of the rail member 106.

The procedure for assembling the above solid relay is as follows.

The nut holding portions 23 ₁ and 23 ₂ of the base 21 are loaded and held with the load terminal nuts 25 ₁ and 25 ₂ , respectively, and the nut holding portions 24 ₁ and 24 ₂ are loaded and held with the nuts 26 ₁ and 26 _{2 of the} cartridge, respectively. The printed wiring board 27 on which the circuit components 28 and the like are mounted is arranged on the main surface side of the base 21 (see FIGS. 4 and 5). The pair of load terminals 6 ₁ and 6 ₂ are installed on the terminal boards 34 ₁ and 34 ₂ and the hook pieces 39 ₁ and 39 ₂ are pushed by pushing operation to the projections 40 ₁ and 40 on the nut holding portions 23 ₁ and 23 _2. Lock to ₂ respectively.
Then, connect the connecting terminal pieces 43 ₁ and 43 ₂ to the support pin 46 on the base 21 side.
The base 21 is fitted from the rear end opening side of the case 49 in a state where it is fitted to ₁ , 46 ₂ to expose the pair of input terminals 31 ₁ , 31 ₂ to the exposure windows 51 ₁ , 51 _2. A pair of load terminals 6 ₁ , 6 ₂
Are exposed to the exposure windows 52 ₁ and 52 ₂ . This constitutes the control circuit block 10 (see FIG. 6).

On the other hand, the triac 11 is sandwiched and fixed by the T ₁ terminal 58 and the T ₂ terminal 59 in the shape of a sun gate (see FIGS. 7A and 7B). On the other hand, the gate terminal 60 is connected via the gate line 62. The mating protrusion 72 and the mating groove 73 at the abutting ends of the two-divided cases 71a, 71b are inserted from the front-rear direction and coupled to form a cartridge case 70, and a heat dissipation plate 67 is attached to the rear end side. Then, the block of the triac 11 is joined to the inner surface of the heat dissipation plate 67 via the insulating plate 69. The lead piece 60a is attached to the gate terminal holding portion 79 of one of the divided cases 71a.
The gate terminal 60 through which is inserted and the gate line 62 are connected. Then, silicone rubber 80 is injected into the case 70 to cover the triac 11 and the like (see FIG. 9). Printed wiring board 8 with absorber circuit components 82, 83, etc.
While accommodating 1 in the cartridge case 70,
Set the absorber terminals 84 ₁ and 84 ₂ to the above T ₁ and T ₂ terminals, respectively.
The outer end portions 58a and 59a of 58 and 59 are joined to each other, and absorber side connecting screws 86 ₁ and 86 ₂ are inserted into the screw insertion holes 85 ₁ (63) and 85 ₂ (64). In this state, insert the elastic engagement piece 90 of the cartridge lip cover 88 into the cartridge edge case 70 side to make the engagement recess.
While engaging with 89, engage hole 92 with cartridge case
The cover 88 is mounted on the cartridge case 70 by engaging with the engaging projection 93 on the 70 side, and the power circuit cartridge 2 is constructed (FIG. 10). At this time, the protruding piece 65 on the T ₂ terminal 59 side
The thermo label 66 attached to the is set facing the transparent window 91.

In addition, after mounting the rail rail 110 together with the coil spring 112 on the mounting substrate 98, the groove lines 100 ₁ , 100 ₂ on the radiator 3 side are mounted.
Insert the above-mentioned mounting plate 98 between them and attach the fixing piece 103 to the connecting piece 9
The mounting board 98 is fixed to the radiator 3 by caulking to 7.

When the control circuit block 10 is pushed into the front surface side of the base portion 3b of the radiator 3, the engaging projections 56, 56 on the case 49 side are pushed.
Is locked in the engaging grooves 55, 55 on the radiator 3 side, and the control circuit block 10 is fixed to the radiator 3. In this state, the base 21 is sandwiched and fixed between the base portion 3b of the radiator 3 and the case 49.

Screw the input terminal screws 33 ₁ and 33 ₂ into the screw holes 31 ₁ and 31 ₂ of the input terminals 5 ₁ and 5 ₂ respectively, and load the terminal screws 36 ₁ and 36 ₂ into the load terminals 6 ₁ and 6 ₂ respectively. Through the respective screw insertion holes 37 ₁ and 37 ₂ to the load terminal nuts 25 ₁ and 25 ₂ .

Finally, connect the power circuit cartridge 2 to the control circuit block.
Pass the hollow portion 50 of the case 49 in 10. That is,
Fit into the penetrating part 200. Holds mounting screws 75 ₁ and 75 ₂ in hole 7
The above-mentioned cartridge 2 is mounted on the relay body 1 side by inserting it into 6 ₁ , 76 ₂ and screwing it into the screw holes 78 ₁ , 78 ₂ on the radiator 3 side, respectively, and the lead piece 60 of the gate terminal 60 is also attached to the gate. It is coupled to the signaling socket 47. If the connecting screws 86 ₁ and 86 ₂ on the absorber side are screwed into the nuts 26 ₁ and 26 ₂ for cartridges, the T ₁ and T ₂ terminals 58 and 59 and the absorber terminal 8
5 ₁ , 85 ₂ are electrically connected in parallel to the load terminals 6 ₁ , 6 ₂ (see Fig. 6).

In the above configuration, the mounting device 4 is used for mounting during use. When mounting on a panel surface (not shown) or the like, the mounting pieces 101 and 102 of the mounting bracket 98 are screwed to the panel surface, and when mounting on the rail 106, the fitting portion 110a and the fitting groove on the tip side of the fixture rail 110 are fitted. The rail pieces 106a and 106b may be inserted between the rails 107 and 107.

Connect a load (not shown) to the pair of load terminals 6 ₁ and 6 ₂ and
When an input signal is applied between the pair of input terminals 5 ₁ and 5 ₂ , the light emitting element 29 lights up and can be visually recognized from the operation display window 53. By applying the input signal, the trigger circuit 8 operates via the input circuit 7, the triac 11 becomes conductive, and power is supplied to the load.

When the triac 11 generates heat due to the operation of the triac 11, the heat is dissipated by the radiator 3 via the radiator plate 67.
On the other hand, if there is a temperature rise due to the above heat generation, the thermo label
66 changes color, this is a transparent window on the cartridge side cover 88
Since it is visible at 91, it is possible to easily grasp the heat generation state of the triac 11.

If the triac 11 is broken due to a short circuit accident, abnormal heat generation, or the like, the power circuit cartridge 2 may be replaced. That is, the absorber side connection screws 86 ₁ and 86 ₂ are unscrewed, the mounting screws 75 ₁ and 75 ₂ are unscrewed, the power circuit cartridge 2 is removed from the relay body 1 side, and a new power circuit cartridge 2 may be mounted. In this case, since the power circuit cartridge 2 can be attached and detached with the mounting screws 75 ₁ and 75 ₂ , the replacement work can be performed quickly.

By exchanging the power circuit cartridge 2, it is possible to simultaneously replace the easily deteriorated absorber circuit parts, so that the service life can be extended and the reliability can be improved.

Furthermore, since the connection state of the load terminals 6 ₁ and 6 ₂ can be left as it is, it is possible to contribute to speeding up the above-mentioned replacement work, and also to eliminate the risk of incorrect wiring during maintenance.

By the way, the heat dissipation plate 67 on the power circuit cartridge 2 side
The joint position between the heat sink 3 and the front surface 3c of the radiator 3 has a great influence on the heat radiation. Regarding this point, in the above configuration,
Since the penetrating portion 200 is formed in the control circuit block 10 corresponding to the substantially central portion of the front surface 3c of the radiator 3, the penetrating portion 2 is formed.
When the power circuit cartridge 2 is fitted into 00, the heat dissipation plate 67 is inevitably joined to the approximate center of the front surface 3c of the heat dissipation device 3, and a good heat dissipation effect is exerted. It is possible to downsize the container 3.

Further, when the power circuit cartridge 2 is mounted, the penetrating portion 200 acts as a fitting guide to facilitate the fitting operation, and moreover, the power circuit cartridge 2 is mounted as compared with, for example, a stacking structure.
Has the advantage that it can be stably held without rattling in the attached state. Of course, the shape of the penetrating portion 200 may be arbitrarily changed according to the outer shape of the power circuit cartridge 2.

When a plurality of solid state relays M ₁ and M ₂ are used in series as shown in FIG. 12, a pair of connecting terminal pieces 43 ₁ and 43 ₂ of the solid state relay M ₁ are connected to the respective inlet / outlet holes 54 ₁ , 54 ₂ by turning operation so as to project laterally, and by screwing with a pair of input terminal screws 32 ₁ , 32 ₂ of the adjacent solid relay M ₂ , the input of the solid relay M ₁ is input. Input terminals of solid state relay M ₂ in which terminals 5 ₁ and 5 ₂ are adjacent to each other via the above-mentioned connecting terminal pieces 43 ₁ and 43 _2.
It is electrically connected in parallel to 5 ₁ , 5 ₂ .

Further, in the above example, the power circuit cartridge 2 is attached to the relay body 1 side with the attaching screws 75 ₁ and 75 ₂ so that it can be attached / detached. However, this attaching / detaching structure is limited to the above screw fastening type. It is not something that will be done.

Furthermore, the electrical connection relationship between the power circuit cartridge 2 side and the control circuit block 10 is not limited to the one using the screws 86 ₁ and 86 ₂ described above, and various kinds of deformation means can be adopted.

[Brief description of drawings]

1 and 2 are a perspective view and an electric circuit block diagram showing an example of a solid state relay according to the present invention in a state where a power circuit cartridge is removed, and FIG. 3 is an exploded perspective view of the whole solid state relay, and FIG. Is a partially cutaway front view showing the solid state relay in the power circuit cartridge removal / insertion state, FIG. 5 is a partially cutaway side view showing the solid state relay in the control circuit block side case removal state, and FIG. 6 is the solid state relay. FIG. 7A is a partially cutaway side view showing the power circuit cartridge mounted state, and FIGS. 7A and 7B are side and front views showing the triac and its peripheral portion of the power cartridge, FIG. 8 and FIG. The figure shows a front view and a partially cutaway side view of the power cartridge in a state before the absorber circuit is incorporated, FIG. 10 is a side sectional view of the power cartridge, and FIG. FIG. 12 is a front view showing the worker luggage with the cover cut away, and FIG. 12 is an explanatory view of the case where a plurality of the solid relays are used in series. 1 ... Relay body, 2 ... Power circuit cartridge, 3
...... Heat sink, 3a ...... Fin part, 3b ...... Base part, 3c ...... Front face, 4 ...... Mounting device, 5 ₁ , 5 ₂ ...... Input terminal, 6 ₁ , 6 ₂ ......
Load terminal, 10 ... Control circuit block, 11 ... Power semiconductor element, 12 ... Absorber circuit, 67 ... Heat sink, 200 ...
… Penetration.

Claims (1)

[Claims] 1. A heat exchanger having a mounting device mounted on the tip side of a fin portion, a pair of input terminals and a load terminal, and mounted on the front surface side of the base portion of the radiator, and a relay with the radiator. A control circuit block that constitutes the main body, a power semiconductor element that is driven and controlled by the control circuit to open and close a load, and 1
At least a built-in absorber circuit interposed between a pair of load terminals is provided, and a power circuit cartridge which is detachably attached to the relay body side and is electrically connectable is provided. In response to the central portion, the control circuit block is provided with a penetrating portion that penetrates from the front side of the block to the front surface of the base of the radiator, and the power circuit cartridge is fitted to the penetrating portion to dissipate heat in the power circuit cartridge. A solid state relay characterized in that a plate is joined to substantially the center of the front surface of the base.