JPH0749833Y2 - Control equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of the Invention> The present invention relates to a control device applied to a temperature control device or the like for selecting and setting plural kinds of control output circuits.

<Prior Art and Problem> In this type of device, for example, a temperature control device, the control output circuit is classified into a plurality of types, for example, a switch output circuit such as a relay, a voltage output circuit, an analog output circuit, etc. The output circuit is different for each model, so-called 1
The model is one output type.

Therefore, as the number of models increases, the amount of inventory increases, and various types of small-quantity production are performed, which increases product costs. In particular, it is inconvenient because the user cannot change the model and even if the control output circuit fails, only that part cannot be easily replaced.

<Purpose of the Invention> The present invention was made in order to solve the inconveniences of the above-mentioned conventional ones, and simplifies the selection and setting of various control output circuits, and can contribute to the reduction of inventory quantity and cost. It is intended to provide control equipment.

<Structure and Effect of the Invention> A control device according to the present invention includes a rectangular cylindrical rear case, a front case detachably fitted to a front opening end of the rear case, and a front case mounted on the front case side. And a wiring board housed in the rear case, a socket mounted on the wiring board and electrically connected and fixed, and a plurality of types of output units removably mounted on the socket. The output unit is provided with control output circuits having different control functions, and the selected predetermined output unit is mounted on the socket and electrically connected thereto.

According to the above configuration, the predetermined one of the plurality of types of output units is detachably attached to the socket provided on the wiring board. The cost can be reduced in the production, and especially the user can easily change the model by selecting the desired output unit, and can speed up the maintenance work by exchanging the output unit.

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

1 and 2 are an external view and a top view with the rear case omitted, showing an example in which the control device according to the present invention is applied to a temperature control device.

In FIG. 1, reference numeral 1 denotes a case, which is composed of a rear case 2 whose front end face is open and a front case 3 which is fitted in a front end opening of the rear case 2. Reference numeral 4 is a terminal portion provided on the rear surface side of the rear case 2, and 5 is a display panel portion provided on the front case 3.

6 (6A, 6B) is a printed wiring board, which is connected to the connecting arm piece 7 (7A, 7B) projecting from the front case 3 side.
It is held so that when the front case 3 is fitted into the rear case 2, the front case 3 is inserted and accommodated in the rear case 2. A plurality of types of control output circuits are selectively set on the wiring board 6.
This is shown in Figures (A) to (E).

8A, 8A is a contact type relay output circuit having a relay contact 11 and a relay coil 12 for opening and closing a load 10 such as a heater connected in series to the power source 9, and FIG. ), 8B is a contactless relay output circuit having a solid state relay 13 such as a triac. Further, in FIG. 7C, 8C is a voltage output circuit having coils 15 and 16 and transistors 17 and 18 for driving the solid-state relay circuit 14 for switching the load with a voltage output, and
8D, 8D is a current output circuit having a transistor 19 for driving the solid state relay circuit 14 with a current output. In FIG. 3 (E), 8E is a DA conversion output circuit having a transistor 20 to which a pulse is input, and an analog device 21 such as a phase control circuit or an electromagnetic valve.
By changing the duty ratio of the input pulse,
It is provided for control via the control circuit 22. In Fig. 3,
Reference numeral 23 is a connection terminal for output wiring.

The various control output circuits are set on a wiring board (not shown) or the like and housed in a housing 80 as shown in FIG. 4 to form an output unit 8. The pitch between the external terminals 81 protruding from the lower surface of each housing 80 is set to be the same in each output unit 8. As shown in FIGS. 2 and 4, a socket 24 common to the output units is mounted on the printed wiring board 6A. A through hole 25 is formed in the bottom wall of the socket 24, and a through hole 26 is also formed in the wiring board 6A corresponding to the through hole 25, so that the socket can be pushed up when the output unit is removed. It is set so as to insert a rod-shaped jig (not shown).

In the above configuration, for example, the third control output circuit
If you need the relay output circuit 8A shown in Figure (A),
The output unit 8 incorporating this relay output circuit 8A is the second
It may be attached to the socket 24 as shown. That is, by inserting the external terminal 81 of the output unit 8 into the terminal insertion hole 240 of the socket 24, the relay output circuit 8A is set on the printed wiring board 6A. In this case, the opening / closing of the relay contact 11 controls the energization of the heater 10 as a load. Further, if another control output circuit is desired to be used, it may be replaced with an output unit 8 incorporating the circuit.

In this way, the various output units 8 can be removably attached to the socket 24 of the printed wiring board 6A, so that it is possible to reduce wasteful inventory by preparing only the various output units 8. Since the wiring board 6A side and the output unit 8 can be separately manufactured, the manufacturing cost can be reduced.

In particular, if the user prepares a desired output unit 8, the model can be easily switched, and even when the control output circuits 8A to 8E are out of order, the output unit 8 can be replaced by one touch. Maintenance workability is improved. In this case, in particular, a contact-type moji such as the relay output circuit 8A has a short life due to a contact failure or the like, so that the advantage that the output unit 8 can be replaced is great.

By the way, if the space between the printed wiring boards 6a and 6B becomes smaller with the miniaturization of this kind of equipment, it becomes difficult to pull out the output unit 8 from the socket 24. In this regard, in the above example, since the through holes 25 and 26 are formed in the bottom wall of the socket 24 and the printed wiring board 6A, respectively,
Insert a rod-shaped jig from the back side of the printed wiring board 6A through holes 25,2
By inserting it into 6 and pushing up the output unit 8,
The output unit 8 can be easily removed from the socket 24.

In the above example, the temperature control device is applied, but it is needless to say that the present invention can be applied to other control devices, and thus the control output circuit is also shown in FIGS. It is not limited to the example of E).

[Brief description of drawings]

1 and 2 are an external view showing an example in which the control device according to the present invention is applied to a temperature control device and a top view without a rear case, and FIGS. 3 (A) to 3 (E) show the same device. FIG. 4 is a diagram showing an example of various control output circuits, and FIG. 4 is an exploded perspective view of a main part of the device. 2 …… Rear case, 3 …… Front case, 6A, 6B ……
Wiring board, 8 ... Output unit, 8A-8E ... Control output circuit, 24 ... Socket.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H05K 7/14 B 7301-4E

Claims (1)

[Scope of utility model registration request] 1. A rectangular tubular rear case, a front case removably fitted to a front opening end of the rear case, and wiring mounted on the front case and accommodated in the rear case. A board, a socket mounted on the wiring board and electrically connected and fixed, and a plurality of types of output units detachably mounted on the socket, each output unit having a different control function. A control device comprising an output circuit, wherein a selected predetermined output unit is mounted on the socket and electrically connected thereto.