JPH073574Y2 - Terminal block - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to a terminal block used for a thermoelectric thermometer, a low mV input instrument, and the like.

(Prior Art) When a meter such as a thermoelectric thermometer is energized, the temperature inside the meter rises. Thermocouple thermometer with thermocouple input or low
In an instrument that measures mV voltage, the temperature rise inside the instrument gives a thermal gradient to the terminal part, so there is an error in the measured value due to a change in thermoelectric input or generation of thermoelectromotive force in a low mV meter. give. In particular, in an instrument that measures a plurality of measurement points with one instrument, a phenomenon of variation between measurement points has occurred.

In order to avoid the influence of such a temperature rise, as shown in FIG. 2, the height of the terminal block (1) is increased to increase the space by the recessed portion on the back surface, and the terminal fitting (2) is attached to the instrument case (10). ), And as shown in FIG. 3, the surface of the structure shown in FIG. 2 is exposed to the space behind the terminal block with a metal plate (3) for equalizing the temperature of the shield and the space. It was embedded as it is.

However, with the above structure, the instrument case (1
Since the distance between 0) and the terminal fitting (2) embedded in the terminal block (1) must be kept sufficiently long, there is a problem that the depth dimension of the instrument becomes large and it is difficult to make a small one. In addition, the terminal fittings (2) are used for the temperature change of the outside air.
There is also a problem that variations tend to occur in the case of multiple inputs, since the temperature of the above reacts sensitively.

(Problems to be Solved by the Invention) The present invention has the problems in the prior art, that is, it is difficult to make a small-sized one, and when there are a plurality of terminal fittings, temperature variations easily occur between the terminal fittings. The object is to realize a terminal block that can be eliminated, and the purpose of the present invention is also there.

[Constitution of device]

(Means for Solving the Problems) The terminal block of the present invention has screw hole inlets provided at one end of the body, which are arranged at predetermined intervals in an insulating terminal block, exposed on the surface of the block and projected at the other end of the body. The connecting pins that have been installed are exposed in the recesses on the back side of the block and embedded in the terminal block, along with the entire length of the row of these terminal brackets, and there is an escape hole for the connecting pin of each terminal bracket. One of the surfaces is embedded in the terminal block by contacting the other end surface of the body of each terminal with a thin insulating plate, and both end edges are led out from both side surfaces of the terminal block. In addition, the heat sink is made of metal and is bent in parallel with the side surface while keeping a gap with the side surface.

(Operation) In the terminal block of the present invention, the both edges of the metal radiator plate which is in contact with the outside air on both sides of the terminal block are exposed to the heat from the outside air to lower the temperature, and the temperature gradient between the inside of the block and the inside of the block is reduced. Therefore, the heat transmitted from the instrument and entering the central portion of the metal heat dissipation plate in the terminal block is transferred to both side edges of the heat dissipation plate and dissipated to the outside air, so that the heat is prevented from being transmitted to the terminal fitting. Further, since each terminal metal fitting is in contact with the central portion of the metal heat radiation plate via the thin insulating plate, the temperature of each terminal metal fitting is strongly influenced by the metal heat radiation plate and always becomes the same temperature.

As a result, the temperatures of the terminal fittings are equalized, so that there is no variation even for a plurality of inputs. Further, even if the outside air temperature changes, the temperatures of the plurality of terminal fittings change in the same manner, so that an error in the measured value hardly occurs.

(Embodiment) Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

1 (a) and 1 (b) show a terminal block according to an embodiment of the present invention. As shown, in the terminal block (11) of the present invention,
Terminal fittings (12) are arranged at a predetermined interval on a terminal block (13) made of an insulating material, and a screw hole inlet provided at one end of the body is exposed on the surface of the block (13) Block the connection pin (12a) protruding from the end (13)
It is exposed in the recess (13a) on the back surface side and is embedded in the terminal block (13). In addition, a metal heat sink (14) that extends over the entire length of the row of these terminal fittings (12) and has a clearance hole for the connecting pin (12a) of each terminal fitting (12) has a thin insulation on one surface. The metal radiator plate (14) is embedded in the terminal block (13) so as to come into contact with the other end of the body of each terminal fitting (12) through the plate (15). The block (13) is led out outward from both side surfaces, and is bent in parallel with the side surface of the terminal block (13) with a gap maintained.

The terminal block (11) of one embodiment of the present invention configured as described above
In the case of, the both sides of the metal radiator plate (14), which is in contact with the outside air on both sides of the terminal block (13), is exposed to the heat from the outside air and its temperature drops, so that a temperature gradient can be formed with the inside of the block. The heat transmitted from the instrument (10) and entering the central part of the metal radiator plate (14) in the terminal block (13) is transferred to both side edges of the metal and dissipated to the outside air. Prevents transmission to the metal fittings (12). In addition, each terminal fitting (1
Since 2) is in contact with the center of the metal heat sink (14) through the thin insulating plate (15), the temperature of each terminal fitting (12) is strongly affected by the metal heat sink (14). , Always the same temperature.

As a result, the temperatures of the terminal fittings (12) are equalized, so that there is no variation even for a plurality of inputs. Further, even if the outside air temperature changes, the temperatures of the plurality of terminal fittings (12) change in the same manner, so that there is no difference in the temperatures of the terminal fittings, and it is difficult for errors in measured values to occur. Furthermore, since the distance between the instrument case (10) and the terminal fitting (12) does not have to be large, the height of the terminal block (11) can be reduced and the depth dimension of the instrument can also be reduced.

[Effect of device]

As described in detail above, according to the present invention, a plurality of terminal fittings embedded side by side in a terminal block are contacted via thin insulating plates to extend into the terminal block, and both end edges thereof are located in the terminal block. By implementing a terminal block that is equipped with a metal radiator plate that is drawn out from both side surfaces of each side and bent in parallel with the side surface while keeping a gap with the side surface, the heat entering the terminal block from the instrument is Since it is dissipated to the outside air from the edge parts on both sides of the metal heat dissipation plate,
Heat is prevented from being transmitted to the terminal fittings. In addition, each terminal metal fitting is strongly affected by the metal heat sink, and even if the outside air temperature changes, the temperature of each terminal metal fitting does not change in the same way and no temperature difference occurs. It is difficult, and there is no variation for multiple inputs. Further, since the distance between the instrument case and the terminal fitting does not have to be large, the height of the terminal block can be reduced and the depth dimension of the instrument can be reduced.

[Brief description of drawings]

FIGS. 1 (a) and 1 (b) show a terminal block according to an embodiment of the present invention. FIG. 1 (a) is a side view, FIG. 1 (b) is a front view, and FIGS. It is a side view which respectively shows the terminal block of a prior art example. 11 ... Terminal block, 12 ... Terminal metal fitting, 12a ... Connecting pin, 13 ... Terminal block, 13a ... Recess on the back side, 14 ... Metal heat sink, 1
5 ... Thin insulating plate.

Claims (1)

[Scope of utility model registration request] 1. A block rear surface, which is provided with an insulating terminal block arranged at a predetermined interval, exposes an inlet of a screw hole provided at one end of a body portion on a surface of the block, and has a connecting pin protruding at the other end of the body portion. Terminal fittings that are exposed in the recesses of the terminal block and are embedded in the terminal block, and have escape holes for the connecting pins of each terminal fitting that extend over the entire length of the terminal fitting row It is embedded in the terminal block by abutting the other end surface of each terminal fitting, and both side edge parts are led out from both side surfaces of the terminal block respectively, and a side surface is provided with a gap from the side surface. A terminal block equipped with a metal heat sink bent in parallel.