JPH02139821A - Relay - Google Patents

Abstract

PURPOSE:To prevent a relay from burning-off due to discharge between terminals for contacts, furnishing an angle-shaped boss tapered between the terminals, and providing a down-taper from the fixed part of each terminal to the end face. CONSTITUTION:An angle-shaped boss 13 tapered is provided at the tip formed between terminals 3 for contacts and between terminals 4 for coils, and attached water or vapor will stream off easily by this boss 13 and taper at its tip. Water or vapor will not stagnate at each terminal part owing to down-taper 15 provided at the end face of a base 1 from the stationary part of each terminal 4 for coil and the one 3 for contact and can be streamed off easily, which decreases the rate of discharging between the terminals greatly, and burning-off of the relay and fire spreading to other components can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a continuous electric device such as a high voltage relay connected to a high frequency generator of a high frequency heating device that uses high frequencies to heat and cook food.

2. Description of the Related Art In general, a high-frequency generator for a high-frequency heating device, as shown in FIG. A magnetron 10 was connected in parallel to the high voltage diode 8. Further, the high-voltage capacitor 5.6 of the high-frequency generator switches the contact a of the high-voltage relay (ie, relay) 11 to open and close the connection of the high-voltage capacitor 6, thereby changing the capacitor capacity. For example, when the power supply frequency is 5.0 Hz, as shown in Figure 4,
The frequency of the power supply is judged by the control circuit 12, contact a is closed without applying an excitation voltage to the coil of the high-voltage relay, and the capacity is increased by adding the capacity of the high-voltage capacitor 5.6 to half-wave multiplication. It constitutes a voltage rectifier circuit. Furthermore, when the power supply frequency is 60Hz, as shown in Fig. 5, the frequency of the power supply is determined by the control circuit 12, and an excitation voltage is applied to the coil of the high-voltage relay to open contact a, thereby opening the high-voltage capacitor. The capacitance is only 5, forming a half-wave voltage doubler rectifier circuit. In this way, regardless of whether the power supply frequency is 50Hz or 60H2, the high frequency output is kept almost constant at any frequency. (Tokuko Showa 53-
19091) Furthermore, as shown in FIG. 6, the high voltage relay 11 has a coil terminal 4 connected to a coil (not shown) and a contact terminal 3 connected to a contact point.

These terminals are fixed to the base part 1.

Further, there is a case 2 for dustproofing, and the base part 1 and the case 2 are fitted together and cover the coil. Note that Figure 7 is the 6th
FIG. 3 is a right side view of the figure.

Problems to be Solved by the Invention However, in such a high frequency heating device, 50
At both Hz and 60 Hz, high voltage is applied to at least one of the contact terminals 3 (indicated by a in FIGS. 4 and 5) of the high voltage relay during energization. In addition, when the high-frequency heating device is energized, water vapor is generated from the food in the heating chamber and may adhere to the surface of the base 1 or case 2 of the high-pressure relay 11, or may become cold in the morning in winter. By energizing the high-frequency heating device, dew condensation may occur on the surfaces of the base portion 1 and case 2 of the high-voltage relay 11, and water may adhere thereto.

When this happens, water or water vapor causes discharge to occur between the contact terminals 3 and between the contact terminals 3 and the coil terminal 4, and depending on the energy, the electric discharge may occur between the contact terminals 3 and the coil terminals 4. This has become a serious problem because the base portion 1 and the case 2 may burn or spread to other parts, creating a risk of fire or electric shock. The present invention solves these conventional problems, and has a simple configuration that prevents water vapor or water adhering to the surface of a high-voltage relay from causing discharge between the contact terminals or between the contact terminal and the coil terminal. To provide a relay (i.e., a relay) that can prevent burnout of the relay due to

Means for Solving the Problems The relay of the present invention includes a coil, a coil terminal connected to the coil, a contact, a contact terminal connected to the contact, and the coil terminal and the contact terminal. In a relay that includes a base portion to be fixed and a case for dustproofing, a mountain-shaped protrusion with a tapered tip is provided between the contact terminals, and the contact terminals and the coil terminal are fixed. This configuration includes a base portion that tapers downward from the bottom to the end surface.

Function The relay of the present invention (hereinafter referred to as a relay) has a mountain-like protrusion between the contact terminals and a downward taper from each terminal fixing part to the end face, so that water vapor, water, etc. Even if a
Therefore, there is no risk of burning out the relay or spreading fire to other parts.
This also eliminates the risk of electric shock or fire.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 is an external view of the high-pressure tray of the present invention. A coil terminal 4 connected to the coil and a contact terminal 3 connected to the contact are fixed to the base portion 1. Projections 13 are provided between the contact terminals and between the coil terminals. The protrusion 13 has an i-bar at its tip and has a mountain-like shape so that water and steam deposits can be washed away immediately. A taper 14 is also provided in the BB' direction to facilitate the flow of water and steam. Also,
A downward taper 15 is provided from the fixing part of the contact terminal 3 and the coil terminal 4 toward the end face of the base part 1, thereby preventing water or water vapor from accumulating in each terminal part.
It is now possible to wash off immediately both in the A-A'' direction and in the B-B' direction. Figure 2 is a right side view of Figure 1. Contact terminal 3 Water and steam adhering to the terminal fixing part of the will immediately flow down along the taper 15 of the base part l.In addition, the base part l is made larger than the case 2, so that moisture from the base part can be absorbed by the fitting between the base part and the case. I don't have to go into the club anymore.

In this way, by providing a mountain-shaped protrusion with a taper 14 at the tip between the contact terminals 3, and by providing a downward taper 15 from each terminal fixing part toward the end surface of the base part 1, water can be reduced. Even if water or water vapor adheres to it, it can immediately flow off, eliminating electrical discharge, preventing the base part 1 and case 2 from burning out, and also eliminating the risk of electric shock or fire due to burning of other parts. Furthermore, by using a thermosetting material with good tracking resistance, such as premix or melamine phenol, for the base part 1 and the case 2, even if an electric discharge occurs, it will not burn out. Safety has been greatly improved.Furthermore, even in high temperature conditions, the base portion 1 does not deform, etc., and the conventional problem of poor contact due to warping of the base portion 1 has completely disappeared, greatly improving reliability.

Effect of the invention With the above configuration, the present invention has the following effects.

■By providing mountain-like protrusions between contact terminals and a downward taper from each terminal fixing part to the end face of the base, the rate of discharge is greatly reduced, thereby preventing burnout of the relay or spread of fire to other parts. The danger has decreased dramatically.

■By using thermosetting resin such as melamine phenol for the base and case materials, there is no risk of relay burnout or other parts being burned due to electrical discharge, greatly improving safety. ■By providing a downward taper from each terminal fixing part to the end face of the base, water and water vapor can quickly flow down, causing water to enter the base part from the conventional terminal fixing part, and causing electrical discharge inside the relay. Things are completely gone.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a relay according to an embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a circuit diagram of a general high-frequency heating device, and Fig. 4 is a main circuit at 50 Hz. 5 is a circuit diagram of the main part of the 60H2, FIG. 6 is a perspective view of the conventional relay, and FIG. 7 is a side view of the same. 1...Base part, 2...Case, 3.
...Contact terminal, 4...Coil terminal,
5, 6... High voltage capacitor, 8... High voltage diode, 9... Secondary winding of high voltage transformer, 10... Magnetron, 11... ...High voltage relay, 12...Control circuit, 13...
・Protrusion, 14°15...Part of the taper. Name of agent Patent attorney Shigetaka Awano Haka 1 person 1 figure 1415・- 1st grade PIIs Child P1 Shizuko 1 part part 3rd figure

Claims (1)

[Claims] A coil, a coil terminal connected to the coil, a contact, a contact terminal connected to the contact, a base part for fixing the coil terminal and the contact terminal, and the coil together with the base part. a case for covering the contact terminals, and a mountain-shaped protrusion with a tapered tip is provided between the contact terminals of the base part, and an end face of the base part is provided between the contact terminals and the coil terminal fixing part. A relay with a downward taper.