JP2012204047A - Terminal block and electrical equipment with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal block such that a female type terminal and a male type terminal are securely engaged with each other.SOLUTION: A terminal block 1 includes a male type terminal 11 having one end formed in a tab shape, and the male type terminal 11 has an abutting part 11b formed by elongating a part thereof. The abutting part 11b abuts against a terminal block wall 15 of the terminal block 1 so that the male type terminal 11 does not elastically deform with force applied to the male type terminal 11 when a female type terminal 2 is engaged with the male type terminal 11. Consequently, the male type terminal 11 and female type terminal 2 can be prevented from being engaged with each other in an incomplete state or not engaged, thereby preventing trouble such as heat generation of an engagement part between both the terminals or failure in supplying electric power to electric equipment mounted with the terminal block 1 due to a contact defect.

Description

  The present invention relates to a terminal block used in an electric device, and more particularly to a terminal block that relays a power source and a power supply board or power supply device provided in the electric device.

  Conventionally, as a terminal block mounted on, for example, an outdoor unit of an air conditioner and relaying a commercial power source or an indoor unit and a power supply board of the outdoor unit, a four-pole screw type terminal as shown in FIG. There is a table 100. In this terminal block 100, four male terminals 110, a thermal fuse 120, and a screw 140, which are arranged in parallel at intervals, are attached to a case made of a resin material (see Patent Document 1).

  The terminal block 100 is attached to the outdoor unit, and a commercial power source or a power supply line from the indoor unit is electrically connected to the male terminal 110 by a screw 140. On the other hand, the male terminal 110 has a tab 110a in which one end of the terminal plate 110e is bent upward and the tip is bent in parallel with the terminal plate 110e. The tab 110a has one end on the power supply board of the outdoor unit. The female terminal 200 connected to the other end of the electric wire 300 to which is connected is fitted. Thereby, the commercial power source or the indoor unit and the power supply board of the outdoor unit are connected via the terminal block 100, and power is supplied from the commercial power source or the indoor unit to the outdoor unit.

  Further, the terminal block 100 is provided with a thermal fuse 120. As shown in FIG. 3B, the thermal fuse 120 is stored in a fixed portion 130 provided in the case of the terminal block 100. With an electric wire (not shown), one end of the thermal fuse 120 is connected to the male terminal 110 to which the power supply line is connected, and the other end is connected to control means mounted on the control board of the outdoor unit. When power is supplied to the outdoor unit via the terminal block 100, the male terminal 110 generates heat due to overheating caused by a short circuit in the circuit board provided in the outdoor unit or a failure of the mounted component. When the thermal fuse 120 is melted by receiving heat, the input from the thermal fuse 120 to the control unit of the outdoor unit is interrupted. Therefore, the control unit of the outdoor unit that detects this causes the power supply from the power supply board to each device of the outdoor unit. Stop supplying. This prevents the outdoor unit from being burned out.

JP-A-10-209654 (page 3, FIGS. 1 and 2)

  In the terminal block 100 described above, as shown in FIG. 3B, when the female terminal 200 is inserted into the tab 110a, a force is applied to the tab 110a in the direction indicated by the arrow. However, since the formation part of the tab 110a in the male terminal 110 is not fixed (the bent part when it is formed in an L shape moves freely), for example, when inserting the female terminal 200 into the tab 110a, There is a possibility that the female terminal 200 hits the tab 110a and the tab 110a bends upward as shown by the broken line in FIG.

  If the tab 110a bends upward, for example, when the female terminal 200 is once pulled out and then inserted into the tab 110a again during manufacture or maintenance of the air conditioner, the female terminal 200 and the tab 110a. May cause incomplete or incomplete mating, resulting in problems such as heat generation at the mating part due to poor contact, or inability to supply power to the power supply board of the outdoor unit. There was a fear.

  The present invention solves the above-described problems, and an object of the present invention is to provide a terminal block capable of reliably fitting a female terminal and a male terminal.

  In order to solve the above-described problems, the terminal block of the present invention includes a rising portion formed by bending upward at least one end of the terminal block, and a tip of the rising portion is further bent so as to be parallel to the terminal plate. A male terminal having a tab formed and a case to which the male terminal is attached. The male terminal includes an abutting portion formed by cutting and raising a part of the rising portion to the opposite side of the tab, and the case includes a terminal block wall against which the abutting portion abuts. .

  In the terminal block of the present invention configured as described above, when the female terminal is inserted into the male terminal, the abutting portion of the male terminal abuts against the terminal block wall, thereby applying the force applied to the male terminal. It is possible to prevent the male terminal from being deformed. Thereby, it is possible to prevent the fitting between the male terminal and the female terminal from being incomplete, or not being able to be fitted, the heat generation of the fitting portion due to poor contact between both terminals, It is possible to prevent the occurrence of a problem such that electric power cannot be supplied to an electric device equipped with a terminal block.

It is the schematic of the terminal block by this invention, (A) is a top view, (B) is principal part sectional drawing in XX of (A). It is principal part sectional drawing which shows other embodiment of the terminal block by this invention. It is the schematic of the conventional terminal block, (A) is a top view, (B) is principal part sectional drawing in YY of (A).

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. As an example, a four-pole screw terminal block that is provided in an outdoor unit of an air conditioner and relays power supply from the indoor unit will be described as an example. The present invention is not limited to the following embodiments, and can be variously modified without departing from the gist of the present invention.

  As shown in FIG. 1, the terminal block 1 according to this embodiment has a male terminal 11, a thermal fuse 12, and a screw 14 attached to a case 4 in which a single or a plurality of resin molded products are combined. As shown in FIG. 1A, the case 4 of the terminal block 1 has four male terminals 11 arranged in parallel at intervals, and an upper tab 11a and a lower tab, which will be described later, of the male terminal 11 are arranged. A screw 14 is screwed to one end opposite to 11d.

  The male terminal 11 is formed by cutting and bending a plate-like brass, and has a coating such as tin plating or nickel plating on the surface. As shown in FIG. 1B, the male terminal 11 includes a rising portion 11f formed by bending one end of a terminal plate 11e upward at a substantially right angle, and a tip of the rising portion 11f parallel to the terminal plate 11e. An upper tab 11a formed by bending is provided, and a lower tab 11d is provided at the other end. The upper tab 11a and the lower tab 11d have the same shape, and are configured to be fitted to the female terminal 2 shown in FIG. The electric wire 3 connected to the female terminal 2 is connected to a power supply board of an outdoor unit (not shown).

  The tip of the upper tab 11a of the terminal plate 11e faces the front of the terminal block 1 (female terminal 2 side in FIG. 1) by the above-described bending, and the terminal plate 11e borders the substantially central portion. The one side and the other side of the terminal board 11e are folded and bent 180 degrees. The terminal plate 11e is bent by 180 degrees so that the tip of the upper tab 11a and the tip of the lower tab 11d are aligned with the front of the terminal block 1.

  Further, an abutting portion 11b formed by cutting and raising a part of the rising portion 11f to the side opposite to the tip portion of the upper tab 11a is provided on the side opposite to the tip portion of the upper tab 11a. As shown in FIG. 1A, the abutting portion 11b is provided at both measuring portions of the terminal plate 11e (upper tab 11a), and the tip of the abutting portion 11b is provided at the case 4 of the terminal block 1. The terminal block wall 15 is in contact with the formed terminal block wall 15. Further, the space between the abutting portions 11b is energized for confirming conduction between the male terminal 11 and the power supply board of the outdoor unit when the female terminal 2 is joined to the male terminal 11 of the terminal block 1. It is set as the jig insertion part 11c, and it is set as the shape which can insert the probe or inspection jig with which electricity supply inspection apparatuses, such as a tester, were equipped.

  As shown in FIG. 1B, the thermal fuse 12 is stored in a fixed portion (arranged almost directly below the terminal block wall 15) provided in the case of the terminal block 1. One end of the thermal fuse 12 is connected to a male terminal 11 to which a power supply line is connected, and the other end is connected to control means mounted on the control board of the outdoor unit by an electric wire (not shown). When power is supplied to the outdoor unit through the terminal block 1, the male terminal 11 generates heat due to overheating caused by a short circuit in the circuit board provided in the outdoor unit or a failure of a mounted component. When 12 is melted, the input from the thermal fuse 12 to the control unit of the outdoor unit is interrupted, and the control unit of the outdoor unit that detects this stops the power supply from the power supply board to each device of the outdoor unit. This prevents the outdoor unit from being burned out.

  As shown in FIGS. 1A and 1B, the screw 14 is screwed into a screw hole (not shown) provided at one end of each male terminal 11 opposite to the upper tab 11a and the lower tab 11d. A substantially square washer is provided below the head of the screw 14. A power supply line for supplying power from the indoor unit is inserted between the washer and the male terminal 11, and the power supply line and the male terminal 11 are electrically connected by tightening a screw 14.

  As described above, the power line from the indoor unit is connected to the male terminal 11 with the screw 14, and the female terminal 2 is connected to the upper tab 11a or the lower tab 11d of the male terminal 11. The electric power required by the outdoor unit is supplied from the indoor unit to the power supply board of the outdoor unit via the terminal block 1.

  Next, a specific effect of the abutting portion 11b of the male terminal 11 in the terminal block 1 of the present embodiment will be described with reference to FIG. When the female terminal 2 is joined to the upper tab 11a or the lower tab 11d of the male terminal 11, as shown by the arrow in FIG. 1B, the terminal block 1 rear side (screw 14 side) with respect to the male terminal 11. The power to go to is added.

  Since the lower tab 11d is parallel to the direction of the insertion force of the male terminal 11 as shown in FIG. 1B, bending or deformation of the lower tab 11d due to the insertion force of the male terminal 11 occurs. do not do. On the other hand, since the upper tab 11a is provided at one end of the terminal plate 11e bent in an L shape as described above, the bent portion when bent into the L shape by the insertion force of the male terminal 11 is provided. There is a risk of bending or deformation. If the upper tab 11a is bent due to this bending or deformation, for example, when the female terminal 2 is once pulled out and then inserted into the upper tab 11a again during manufacture or maintenance of the air conditioner, the female tab There is a possibility that the terminal 2 and the upper tab 11a are not completely fitted or not fitted, and heat of the fitting part due to poor contact and power supply to the power supply board of the outdoor unit can be performed. There is a risk that such a problem may occur.

  However, in the male terminal 11 of this embodiment, as shown in FIG. 1B, the abutting portion 11 b is in contact with the terminal block wall 15 of the terminal block 1, so that the female terminal 2 is inserted. In addition, even if an insertion force is applied to the male terminal 11, the displacement of the abutting portion 11 b, that is, the displacement of the upper tab 11 a is restricted by the terminal block wall 15.

  As a result, the bending and deformation of the upper tab 11a are suppressed by the insertion force of the female terminal 2, so that the male terminal 11 and the female terminal 2 can be securely fitted, and as a result, the power line from the indoor unit A reliable relay connection with the power supply board of the outdoor unit can be performed.

  Next, a second embodiment of the terminal block according to the present invention will be described with reference to FIG. In the terminal block 10 according to this embodiment, a male terminal 21, a thermal fuse 12, and a screw 14 are attached to a case 4 in which one or a plurality of resin molded products are combined. Since the case 4, the thermal fuse 12 and the screw 14 are the same as those of the terminal block 1 of the first embodiment, detailed description thereof is omitted. The difference from the first embodiment is the shape of the male terminal 21 and its fixing method to the case 4.

  The basic shape of the male terminal 21 is the same as that of the male terminal 11 in the first embodiment, and an upper tab 21a having the same shape as the upper tab 11a is provided at one end thereof. The difference from the male terminal 11 is that it is an abutting portion 21b having a length extending backward from the abutting portion 11b of the male terminal 11. As shown in FIG. 2, in the terminal block 20, the insertion portion 21 b of the male terminal 21 is formed in a recess 25 a that is provided on the terminal block wall 25 of the case 4 of the terminal block 20 and corresponds to the shape of the tip of the abutting portion 21 b. Has been inserted.

  Since the abutting portion 21b is continuous with the upper tab 21a, the abutting portion 21b is provided in the terminal block wall 25 and inserted into the recess 25a, so that the upper tab 21a can be bent more effectively in the vertical direction. Can be suppressed. Therefore, the male terminal 21 and the female terminal 2 can be more reliably fitted, and as a result, a reliable relay connection between the power supply line from the indoor unit and the power supply board of the outdoor unit can be performed.

  As described above, in the terminal block according to the present invention, when the female terminal is inserted into the male terminal, the male terminal is elastically deformed by the force applied to the male terminal. Can be prevented by contacting the terminal block. As a result, it is possible to prevent the fitting between the male terminal and the female terminal from being incomplete or unfit, and the heat of the fitting part due to poor contact and the terminal block can be prevented. It is possible to prevent the occurrence of problems such as the inability to supply power to the mounted electrical equipment.

  Further, by providing the electric device with the terminal block according to the present invention, the electric device can stably connect the power supply source such as a commercial power source and the power supply board or power supply device provided in the electric device, so that the electric device can stably supply power. The supply can be received and the operation is stabilized.

DESCRIPTION OF SYMBOLS 1 Terminal block 2 Female terminal 3 Electric wire 4 Case 10 Terminal block 11 Male terminal 11a Upper tab 11b Abutting part 11c Current supply jig insertion part 11d Lower tab 11e Terminal board 11f Rising part 12 Thermal fuse 13 Fixing part 14 Screw 15 Terminal block wall 21 Male terminal 21a Tab 21b Abutting part 21f Rising part 23 Fixed part 25 Terminal block wall 25a Recessed part 100 Terminal block 110 Male terminal 110a Tab 120 Thermal fuse 130 Fixed part 140 Screw 200 Female terminal 300 Electric wire

Claims (4)

A male terminal having a rising portion formed by bending at least one end of the terminal plate upward, a tab formed by further bending the tip of the rising portion so as to be parallel to the terminal plate, and the same male terminal are attached. A terminal block with a case,
The male terminal includes an abutting portion formed by cutting and raising a part of the rising portion to the opposite side of the tab,
The terminal block characterized in that the case includes a terminal block wall against which the abutting portion comes into contact.   The terminal block according to claim 1, wherein the abutting portion is formed to be parallel to the terminal plate.   The terminal block according to claim 1, wherein a concave portion corresponding to the shape of the abutting portion is provided in the terminal block wall.   An electric device comprising the terminal block according to claim 1.

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