JPH03214534A - Power switch - Google Patents

Abstract

PURPOSE:To reduce the number of component parts used, by constructing a fuse case so that its one surface serves as a switch operating surface, incorporating a pair of contact pieces in the fuse case, and furnishing a trip contact terminal. CONSTITUTION:A socket 5 for a fuse case 4 is fixed to the left half of a switch part 1, and four plug receptacles 51-54 are furnished, among which the receptacles 52-54 are connected with power supply terminal 62 and trip contact terminals 63, 64 as mating respectively while the receptacle 51 is connected with a movable contact piece 81. Another power supply terminal 61 is connected with a fixed contact piece 82. When the operating surface 40 of a power switch is pushed to cause to be flush with the device panel surface 9, a fuse metal wire 15 is connected with the power supply terminals 61, 62 serially, and the wire 15 will blow off. Now another movable contact piece 23 inclines to contact a fixed contact piece 24, and the abovementioned trip contact terminals 63, 64 shortcircuit to each other. Accordingly if a pair of trip contact terminals are put in connection with an alarm circuit, the power switch can serve also as an alarm fuse when the fuse blow off, which allows accomplishing reduction of the number of component parts used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power switch having a built-in fuse and a trip contact terminal thereof. [Prior Art] Stone alarm fuses are known that issue an alarm by a trip signal generated when a fuse connected between a power source and a load blows. Conventionally, switches and alarm fuses were connected and wired in series to the power supply circuit of the device. [Problems to be solved by the invention] Making devices more compact is an eternal challenge. Therefore, the area of the panel surface of the device is limited. When a large number of components were to be mounted on a panel surface, it was sometimes difficult to mount all the components on the limited panel surface area. In such cases, it is necessary to reduce the number of parts as much as possible. In view of the above-mentioned problems, the present invention provides a power switch that is useful for reducing the number of parts. [Means for Solving the Problems] In order to achieve the above object, the power switch of the present invention has first and second IJ operation surfaces that intersect at an obtuse angle and are rotatable around one axis. The first operation surface of the waveform switch operating section is the front face of a removable fuse container, and the back surface of the fuse container has a first operation surface connected to each end of the fuse. A second plug, a third plug connected to one end of the fuse and connected to a movable contact that is displaced when the fuse blows, and a fourth plug that is connected to a fixed contact that contacts the displaced movable contact protrude. , the plug receiver into which the first plug is inserted is connected via a pair of contacts that are opened when the second operating surface is parallel to the mounting surface and closed when the first operating surface is parallel to the mounting surface. the first power terminal to which the plug is inserted, the second power terminal to which the plug receiver into which the second plug is inserted is connected, and the first and second power terminals to which the plug receivers to which the third and fourth plugs are respectively inserted are connected. It shall be equipped with two trip contact terminals. [Operation] Formed by the front of the fuse container of the waveform switch? When the first operating surface is parallel to the switch mounting surface, the pair of contacts closes, and a connection is established between the pair of power terminals through the receptacle with a plug holder, the plug inserted into it, and the fuse. When the second operating surface of the waveform switch is made parallel to the switch mounting surface, the contactor opens and the pair of power terminals are opened, so it functions as a switch. and connected to one end of the fuse,
When the fuse blows, the movable contact displaces and contacts the fixed contact, and if a pair of trip contact terminals connected to both contacts via a plug and a socket are connected to an alarm circuit, an alarm will be generated when the fuse blows. It has the function of an alarm fuse. In other words, the power switch also serves as an alarm fuse, which helps reduce the number of parts. In addition, when the fuse blows out, the fuse can be replaced by removing the plug protruding from the fuse container from the socket and installing a new fuse container. The switch part 1 is rotatably supported around a shaft 26 at the tip of a support fitting 3 attached to the fixed part 2. A socket 5 of a fuse container 4 is fixed to the left half of the switch section 1 in the figure. The fuse socket 5 has four plug sockets 51, 52, 53.
There are 54. Power terminals 61, 62, . }Plug receiver 52, 53.5 with lip contact terminal 63.64
4 are the opposing terminals 62, 63, 64 and the wiring 1 [7
The plug receiver 51 is connected to a movable contact 81 and the power terminal 61 is connected to a fixed contact 82. The upper surface 10 of the right half of the switch section 1 and the fuse unit 4
The upper surfaces 40 of the switch intersect at an obtuse angle of nearly 180° and form the operating surface of the switch. Therefore, this switch is a waveform switch. When this switch is embedded and installed in the device panel surface 9, when the operation surface 10 is on the same plane as the panel surface 9, the movable contact 81 and the fixed contact 82
are separated from each other, and when the operating surface 40 is on the same plane as the panel surface 9, the movable contact 81 and the fixed contact 82 are in contact with each other. FIG. 2 (JIl. (bl) shows the internal structure of the fuse container 4. Outside the container are plugs 11, 12, 13.
14 protrudes, the plugs 11.12 are respectively connected to fuse support conductors 21.22 in the container, and the plugs 11.12
3 is connected to a movable contact 23 inside the container, and the plug 14 is connected to a fixed contact 24 inside the container. As shown in FIG. 2 (ta), a fuse metal wire 15 is stretched between the fuse support conductors 21 and 22, and one end of the fuse metal wire is fixed to an insulator 16. It is connected to the tip of the leaf spring 17 and draws the leaf spring toward the fuse support conductor 22. In this state, the movable contact 23 maintains a distance defined by the fixed contact 24 and the insulator 18. If this fuse container 4 is attached to the fuse socket 5 as shown in FIG. 1, the plugs 11, 12.
13.14 and the plug receivers 51.52, 53.54 are connected to each other, and when the operating surface 40 of the power switch is pressed to be flush with the device panel surface 9, the fuse metal wire 15
and power supply terminals 61 and 62 are connected in series. Power terminal 6
Figure 2 shows the state when the fuse metal strip 15 melts due to overcurrent flowing through 1.62. In this case,
Since the force pulling the leaf spring 17 toward the fuse support conductor 22 is removed, the leaf spring moves to the opposite side and pulls the insulator l8
Push the movable contact 23 through the . As a result, the movable contact 23 tilts and contacts the fixed contact 24. In other words, there is a short circuit between the trip contact terminals 63 and 64. FIG. 3 shows an equivalent circuit of this power switch. The area surrounded by a chain line 31 is the power switch, and parts corresponding to those in FIGS. 1 and 2 are given the same reference numerals. ．． The figure shows a state in which the operating surface 10 of the switch is pressed and the power circuit 32 connected to the power terminals 61 and 62 is open. When the operation surface 40 of the switch is pressed, the movable contact 81 and the fixed contact 82 come into contact, and the power supply circuit 32 is closed. When the fuse metal wire 15 blows while the power supply circuit is closed, the movable contact 23 and the fixed contact 24 come into contact, and a trip signal is sent to the fuse alarm circuit 33 from the trip contact terminals 63 and 64. Therefore, the fuse alarm circuit 33
An alarm device connected to the fuse trip signal can be generated. Figure 4 shows an enlarged view of the support mechanism of the switch section 1. Fourth
A grooved shaft 25 is fixed to a switch part (not shown), and is rotatable around a shaft 26 at the tip of the support fitting 3 attached to the fixed part 2. When the operating surface 40 of the fuse container 4 is pressed, the grooved shaft 25 rotates in the direction of the arrow, and the striker fitting 27 is disengaged from the groove 28 of the grooved shaft and fitted into the groove 29, and the operating surface 10 of the swing section 1 is rotated. is locked in a manner protruding from the device panel surface 9. At this time, the movable contact 81 comes into contact with the fixed contact 82. Conversely, when the operation surface 10 of the switch section 1 is pressed, the stomper fitting 2
7 is removed from the groove 29 and fitted into the groove 28, and the operating surface 40 of the fuse container 4 is locked in a manner protruding from the device panel surface 9. Therefore, the fuse container 4 can be attached and detached. In other words, the fuse container can be installed and removed only when the power supply circuit is disconnected. When the fuse metal wire is blown, the fuse container 4 can be replaced. [Effects of the Invention] According to the present invention, the power switch has a built-in fuse container, one side of the fuse container is used as a switch operation surface, the fuse container has a built-in pair of contacts that come in contact only when the fuse blows, and the fuse container has a built-in fuse container. By providing a trip contact terminal from which a trip signal can be taken out, we were able to obtain a power switch that also has the function of an alarm fuse. This reduces the number of parts and is also effective in terms of safety, as the fuse container can be attached and removed only when the switch is off.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a power switch according to an embodiment of the present invention, and Fig. 2 shows its fuse container, of which ial is $6.
, (b) is a sectional view when the fuse is blown, FIG. 3 is an equivalent circuit diagram of the power switch of FIG. 1, and FIG. 4 is an enlarged view of the switch support mechanism of the power switch of FIG. 1.

Claims (1)

[Claims] 1) The first operating surface of the waveform switch operating section, which has first and second operating surfaces that intersect at an obtuse angle and is rotatable around one axis, is the front surface of the removable fuse container; On the back side of the fuse container are first and second plugs connected to both ends of the fuse, a third plug connected to one end of the fuse and connected to a movable contact that is displaced when the fuse blows, and the displaced movable contact. The fourth plug connected to the fixed contact that contacts the child protrudes, and the plug receiver into which the first plug is inserted is opened when the second operating surface is parallel to the mounting surface, and the first operating surface A first power terminal that is connected via a pair of contacts that close when is parallel to the mounting surface, a second power terminal that is connected to the plug receiver into which the second plug is inserted, and a third and fourth power terminal. A power switch characterized in that the power switch is provided with first and second trip contact terminals to which plug receptacles into which respective plugs are inserted are connected.