JPH0747908Y2 - 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.

<Prior Art and Problems> For example, in a temperature control device, a plurality of control output circuits are provided,
For example, it is classified into a switch output circuit such as a relay, a voltage output circuit, and an analog output circuit.
The output circuit is different for each model, so-called one model / 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.

In addition, conventionally, an electric device such as a relay is detachably attached to a plurality of sockets that are connected and fixed to a wiring board.
It is known that a display card is sandwiched between the sides of adjacent sockets to display the purpose of use of the electric device mounted on the socket (see Japanese Utility Model Publication No. 49-30761).

However, according to the above configuration, since the display card is set at a position that does not hinder the electric device from being attached to the socket, an electric device different from the display card is inadvertently attached to the socket, causing a malfunction. Becomes

Also, when the wiring board with the socket and the display card having the above-mentioned configuration is incorporated in a control device of this type, the electric device and the display card should be visually recognized from the outer surface of the rear case that constitutes the control device. Therefore, even in this case, malfunction of the control device cannot be prevented.

<Purpose of Invention> This invention was made to solve the above problems.
The objective is to provide a control device that can reduce the inventory quantity and cost in response to a wide variety of small-volume production, and that allows the user to easily and reliably change the model with a simple configuration and work. And

<Structure and Effect of the Invention> A control device according to the present invention comprises a rectangular cylindrical rear case having a terminal portion on the rear outer surface side, and a front case detachably fitted to the front opening end of the rear case. A wiring board mounted on the front case side and housed in the rear case, a socket mounted on the wiring board and electrically connected and fixed, and a detachably mounted control socket for the control function of the socket. A plurality of different control input or output circuits are unitized into a circuit unit and a caustic display material releasably attached to the terminal portion of the rear case.

According to the above configuration, the front case is detachably fitted to the rear case, the wiring board is mounted on the front case side and accommodated in the rear case, and the circuit unit is attached to the socket fixedly connected to the wiring board. Since it is detachably attached, the user can easily change the model with a simple configuration and work, and it is possible to achieve a reduction in the amount of inventory and cost in response to a variety of small-volume production.

If the selected circuit unit is not yet mounted on the socket, a caustic indicator is attached to display that fact.If the causal indicator is not removed, wiring to the rear case terminals is allowed. First, the model can be changed with high reliability.

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

FIG. 1 and FIG. 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 with the rear case omitted.

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 (load) 21 such as a phase control circuit or an electromagnetic valve, and a duty ratio of the input pulse By being changed, it is provided for control via the control circuit 22.
In FIG. 3, reference numeral 23 is a connection terminal for output wiring in the terminal portion 4.

The above 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 a unit 8. The pitch of the external terminals 81 protruding from the lower surface of each housing 80 is set to be the same in each unit 8. As shown in FIGS. 2 and 4, a socket 24 common to each unit is mounted on the printed wiring board 6A. Through holes 25 are formed in the bottom wall of the socket 24, and through holes 26 are also formed in the wiring board 6A corresponding to the through holes 25, for pushing up the socket used when removing the unit. It is set so that a rod-shaped jig (not shown) can be inserted therethrough.

The terminal portion 4 of the case 1 has a structure shown in FIG. 1, FIG.
As shown in FIG. 5b, when a unit 8 is not mounted, a causal indicator material for notifying the user, for example causal label 27, is detachably attached so as to cover a part of the terminal portion 4. There is.

In the above configuration, for example, the third control output circuit
If you need the relay output circuit 8A shown in Figure (A),
The unit 8 incorporating this relay output circuit 8A may be attached to the socket 24 as shown in FIG. That is, the external terminal 81 of the unit 8 is connected to the terminal insertion hole 24 of the socket 24.
By inserting into 0, 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. If another control output circuit is desired, it may be replaced with a unit 8 having that circuit built therein.

In this way, the various units 8 are mounted on the printed wiring board.
Since it can be detachably attached to the socket 24 of 6A, it is possible to reduce wasteful inventory quantity by simply preparing various units 8 alone, and also to efficiently separate the wiring board 6A side and the unit 8. Since it can be manufactured, the manufacturing cost is also low.

In particular, if the user prepares a desired unit 8, it is possible to easily switch models, and
Even when the control output circuits 8A to 8E are out of order, the unit 8 can be replaced by one touch, so that the maintenance workability is improved. In this case, in particular, in the case of a contact type such as the relay output circuit 8A, the life is short due to a contact failure or the like, so that there is a great advantage that the unit 8 can be replaced.

By the way, since the selection and mounting of the various units 8 are entrusted to the user, if the unit 8 is handed over to the user without being mounted, the user wires the terminal unit 4 as it is and operates normally. Do not misunderstand that it is a defective product. As a countermeasure for this, a method of printing a note near the connection diagram (not shown) on the side surface of the rear case 2 may be considered. In this case, the user may overlook the note. There is a possibility that
Even after mounting the unit 8, there is a problem that the above notes remain.

In this regard, in the above embodiment, the terminal portion 4 of the case 1 is used.
Since the label 27 is peelably attached to the
When the user wires the terminal portion 4, the caution label 27 must be peeled off and wired as shown by the chain line in FIG. 6, so that the caution note of the caution label 27 must be noticed. Therefore, it is possible to surely eliminate the possibility that the unit 8 is wired without being mounted and is mistaken as a defect.

Further, in the above example, the explanation was given by using the caution label 27 in which the control output circuits 8A to 8E of the temperature control device are respectively united, but various control input circuits of other devices are unitized. The same can be applied to the above.

[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 shows examples of various control output circuits, FIG. 4 is an exploded perspective view of a unit mounting portion of the device, FIGS. 5a and 5b are side and rear views of the device, and FIG. It is explanatory drawing at the time of peeling off of the label. 2 …… Rear case, 3 …… Front case, 6A, 6B ……
Wiring board, 8 ... Unit, 8A-8E ... Control output circuit,
24 …… Soket, 27 …… Cassion display material.

Claims (1)

[Scope of utility model registration request] 1. A rectangular cylindrical rear case having a terminal portion set on the rear outer surface side, a front case detachably fitted to the front opening end of the rear case, and a front case mounted on the front case side. A wiring board housed in the rear case,
A socket mounted on the wiring board and electrically connected and fixed; a circuit unit detachably mounted on the socket and having a plurality of types of control input or output circuits each having a different control function unitized; A causal display material releasably attached to the terminal portion of the case is provided, and the non-mounting of the selected predetermined circuit unit is indicated by the affixing of the causal display material, and the aforesaid removal of the causal display material A control device configured to allow wiring to a terminal portion.