JP4118100B2 - Breaker voltage display - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a voltage display device in a plug-in type breaker provided with a voltage switching mechanism.
[0002]
[Prior art]
Of the plug-in type breakers, many of the types in which the voltage is switched by moving the plug position on the power source side are provided with a voltage display device to prevent a voltage connection error. In this voltage display device, the connection state of the plug can be confirmed on the surface of the breaker. For example, a movable voltage display member is provided inside the display window on the upper surface of the case, and the voltage display member is interlocked with the position of the plug. For example, 100V and 200V can be identified by changing the color visible from the display window.
[0003]
FIG. 9 is a diagram showing a typical conventional example. The lower side moving between the middle and lower stages connected to the upper and lower three-stage N pole, L1 pole, and L2 copper bars (not shown). There are a plug and an upper plug that moves between an upper stage and a middle stage, which will be described later. A display window 2 is formed on the upper surface of the case 1, and a rotary voltage display member 3 is pivotally supported on the inside thereof. The voltage display member 3 is made of plastic and is always urged counterclockwise by the urging spring 4. For this reason, in the 200V connection state in which the upper plug 5 is in the middle stage, that is, facing downward and away from the voltage display member 3, it rotates counterclockwise, and the colored portion 6 on the right side of the outer peripheral portion of the voltage display member 3 moves from the display window 2. It can be seen.
[0004]
However, when the plug 5 is rotated in order to switch to the 100V connection state, the plug 5 located in the upper stage directly presses the protrusion 7 of the voltage display member 3 and rotates the voltage display member 3 clockwise against the biasing spring 4. Let As a result, the colored portion 6 on the right side of the outer peripheral portion of the voltage display member 3 becomes invisible from the display window 2. However, such a conventional voltage display device has the following problems.
[0005]
First, in the 100V connection state, the plastic voltage display member 3 remains pressed against the plug 5 which is a charging unit by a spring force, so that the voltage display member 3 is deformed due to heat generated by energization and can be displayed correctly. There is a possibility of disappearing. Secondly, since the urging spring 4 is necessary, the number of parts is increased, and the voltage display member 3 and the urging spring 4 are both small and the assembly work is not easy. Thirdly, in the 100V connection state, the plug 5 is inclined by the spring force of the biasing spring 4 acting on the voltage display member 3, and there is a possibility that trouble may occur when the plug 5 is inserted into the copper bar.
[0006]
[Problems to be solved by the invention]
A first object of the present invention is to solve the above-described conventional problems and to provide a voltage display device for a breaker in which the voltage display member is not deformed due to heat generated by a charging unit. Another object of the present invention is to provide a voltage display device for a breaker that can reduce the number of components, is easy to assemble, and does not tilt the plug by the voltage display member.
[0007]
[Means for Solving the Problems]
The present invention made to solve the above problems is a voltage display device for a breaker that performs voltage switching by rotating a plug on the power supply side, and is engaged with an insulating plug fixing member that holds the plug. The voltage display member that is swung is provided near the upper surface of the case. In addition, it is preferable that the voltage display member is rocked by engaging with an inner portion of the plug fixing member, and the voltage display member is rocked by being in direct contact with the plug fixing member. It is preferable. Furthermore, it is preferable that the voltage display member has a structure that does not receive pressure from a member other than the plug fixing member.
[0008]
Since the voltage display device of the breaker according to the present invention does not directly contact the plug as the charging unit as in the prior art, the influence of the heat generated in the charging unit on the voltage display member is small. In the present invention, since the biasing spring is not used as in the prior art, the number of parts can be reduced and the assembly is facilitated. In addition, since the biasing spring is not used as in the prior art, the plug is not inclined by the voltage display member.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention are shown below.
FIG. 1 is an overall view of a plug-in type breaker incorporating the voltage display device of the present invention, and a power source side plug 11 is provided in two stages on the left side of a case 10. Each plug 11 has a shape in which a metal piece can be bent into a substantially U shape as shown and plugged into the N pole, L1 pole, and L2 pole copper bars from above for power supply. Each plug 11 is fixed to one surface (upper or lower surface) of an insulating plug fixing member 12 made of plastic. The plug fixing member 12 has a U-shaped cross section as shown in FIG. 2 and includes shaft portions 13 and 14 on both sides, and these shaft portions 13 and 14 are supported by bearing portions formed in the case 10. Can be rotated. The stranded wire is drawn from the center of the shaft portion 13.
[0010]
Therefore, if the upper plug fixing member 12 is rotated as shown in FIGS. 1 and 3 and the upper plug 11 is positioned in the upper stage, a 100V connection state is obtained, and the upper plug 11 is rotated downward as shown in FIG. If the upper plug 11 is positioned in the middle, a 200V connection state is established. In addition, since it contacts the side wall of the case 10, the plug 11 and the plug fixing member 12 can be rotated only within a range of about 180 degrees. In order to display such a connection voltage, a display window 15 is formed on the upper surface of the case 10, and a swingable voltage display member 16 is provided immediately below the display window 15.
[0011]
As shown in FIG. 5, the voltage display member 16 is provided with a shaft portion 18 for pivotally supporting the case 10 on one side of a substantially disc-shaped base portion 17, and with the L upward from the base portion 17. The arm of the mold is extended, and roof-type voltage display surfaces 19 and 20 are formed on the upper surface of the end portion. Depending on the swing angle, the voltage display is performed such that one of the voltage display surfaces 19 and 20 color-coded can be seen from the display window 15 of the case 10. A part of the substantially disc-shaped base portion 17 is cut out, and a leg portion 21 having a distal end bent at an angle of about 45 ° is projected from one end of the base portion 17 as shown in the figure.
[0012]
As shown in FIGS. 3 and 4, the leg portion 21 of the voltage display member 16 is directly engaged with the upper plug fixing member 12 described above, and the voltage display member 16 is swung as the plug fixing member 12 is rotated. The display is structured. This point will be described in more detail below.
[0013]
As shown in FIG. 2, the plug fixing member 12 includes a U-shaped groove 22 for passing a wire through an inner portion of the plug 11, but the heights of the ribs 23 and 24 on both sides thereof are changed. The higher rib 23 has such a height that the leg portion 21 of the voltage display member 16 cannot get over. The lower rib 24 has such a height that the leg portion 21 of the voltage display member 16 can get over. Note that the opening of the U-shaped groove 22 faces the plug 11. The opposite surface of the U-shaped groove 22 is an arcuate surface 25 having a stepped portion 26.
[0014]
First, in the 100V connection state, as shown in FIG. 3, the leg portion 21 of the voltage display member 16 is fitted between the ribs 23 and 24 of the plug fixing member 12. In this state, a voltage display surface 19 for 100 V is displayed from the display window 15. FIG. 6 shows how the plug fixing member 12 is rotated in order to switch from this state to the 200V connection state.
[0015]
When the plug fixing member 12 is rotated clockwise in FIG. 6, the lower rib 24 of the plug fixing member 12 pushes the leg portion 21 of the voltage display member 16. For this reason, the voltage display member 16 starts to rotate counterclockwise, and the tip of the leg portion 21 of the voltage display member 16 gets over the rib 24 in the center state of FIG. Further, when the plug fixing member 12 is completely rotated, the leg portion 21 of the voltage display member 16 fits between the step portion 26 following the lower rib 24 and the case rib 27 as shown in the leftmost diagram of FIG. Is done. In this state, the voltage display surface 20 for 200 V is displayed from the display window 15.
[0016]
In contrast, FIG. 7 shows a state in which the plug fixing member 12 is rotated to switch to the 100V connection state. In this case, since the plug fixing member 12 is rotated counterclockwise, the tip of the leg portion 21 of the voltage display member 16 enters the U-shaped groove 22 when the plug fixing member 12 is rotated halfway. Further, when the state shown in the center of FIG. 7 is reached, the higher rib 23 rotates while pushing the side surface of the leg 21, and the voltage display member 16 starts to rotate clockwise. When the plug fixing member 12 is completely rotated, the leg 21 is positioned between the left and right ribs 23 and 24 as shown in the right end of FIG. 7, and the voltage display surface 19 for 100 V is displayed from the display window 15. .
[0017]
As described above, in the present invention, the voltage display member 16 provided near the upper surface of the case is directly engaged with the insulating plug fixing member 12 to be swung, so that even if the plug 11 generates heat by energization, it is made of plastic. The voltage display member 16 is not easily affected. The voltage display member 16 swings when its leg 21 is pushed left and right by the plug fixing member 12, but since the biasing spring does not exist, the voltage display member 16 receives pressure (external force) from members other than the plug fixing member 12. ), And there is no conventional strong contact pressure between the voltage display member 16 and the plug fixing member 12. For this reason, the plug fixing member 12 is not tilted by the voltage display member 16 in any of the 100V connection state and the 200V connection state, and there is no trouble at the time of insertion into the copper bar.
[0018]
Furthermore, in the present invention, since the conventional biasing spring is eliminated, the number of parts is reduced, the cost can be reduced, and the assembling work is facilitated. FIG. 8 shows an assembling process. The plug fixing member 12 is fitted into the case 10, the voltage display member 16 is fitted from the side, and the case 10 is sandwiched between the case 10 on the opposite side, so that the assembly can be easily performed. .
[0019]
【The invention's effect】
As described above, the voltage display device for a breaker according to the present invention is less affected by the voltage display member due to heat generated by the charging unit. In addition, the breaker voltage display device of the present invention eliminates the conventional biasing spring, so that the number of parts can be reduced, the assembly work is easy, and the plug does not tilt due to the voltage display member. It is what has.
[Brief description of the drawings]
FIG. 1 is an overall view of a plug-in type breaker incorporating a voltage display device of the present invention.
2A is a front view, FIG. 2B is a plan view, FIG. 2C is a right side view, FIG. 2D is a left side view, and FIG.
3A is a front view, FIG. 3B is a plan view, and FIG.
4A is a front view, FIG. 4B is a plan view, and FIG. 4C is a left side sectional view showing a 200V connection state;
5A is a front view, FIG. 5B is a plan view, FIG. 5C is a right side view, and FIG. 5D is a left side view.
FIG. 6 is a diagram illustrating a switching process from a 100V connection state to a 200V connection state.
FIG. 7 is a diagram illustrating a switching process from a 200V connection state to a 100V connection state.
FIG. 8 is an explanatory diagram of an assembly process.
FIGS. 9A and 9B are diagrams showing a conventional technique, (A) 100V connection state diagram and (B) 200V connection state diagram.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Prior art case 2 Display window 3 Voltage display member 4 Energizing spring 5 Plug 6 Coloring part 7 Protrusion 10 Case 11 of this invention Plug 12 Plug fixing member 13 Shaft part 14 Shaft part 15 Display window 16 Voltage display member 17 Base 18 Shaft portion 19 Voltage display surface 20 Voltage display surface 21 Leg portion 22 U-shaped groove 23 Rib 24 Rib 25 Arc surface 26 Step portion 27 Case rib

Claims (4)

A voltage display device for a breaker that performs voltage switching by rotating a plug on the power supply side, and a voltage display member that is oscillated by engaging with an insulating plug fixing member that holds the plug is disposed near the upper surface of the case. A voltage display device for a breaker provided. 2. The voltage display device for a breaker according to claim 1, wherein the voltage display member is rocked by engaging with an inner portion of the plug fixing member. The voltage display device for a breaker according to claim 1 or 2, wherein the voltage display member is swung in direct contact with the plug fixing member. The voltage display device for a breaker according to any one of claims 1 to 3, wherein the voltage display member has a structure that does not receive pressure from members other than the plug fixing member.

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