KR101801971B1 - Switch for preventing of starting current - Google Patents

Switch for preventing of starting current Download PDF

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Publication number
KR101801971B1
KR101801971B1 KR1020150185836A KR20150185836A KR101801971B1 KR 101801971 B1 KR101801971 B1 KR 101801971B1 KR 1020150185836 A KR1020150185836 A KR 1020150185836A KR 20150185836 A KR20150185836 A KR 20150185836A KR 101801971 B1 KR101801971 B1 KR 101801971B1
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KR
South Korea
Prior art keywords
switch
contact
variable resistor
moving
resistance value
Prior art date
Application number
KR1020150185836A
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Korean (ko)
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KR20170076856A (en
Inventor
이상준
고상경
신종인
조성윤
Original Assignee
현대다이모스(주)
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Priority to KR1020150185836A priority Critical patent/KR101801971B1/en
Publication of KR20170076856A publication Critical patent/KR20170076856A/en
Application granted granted Critical
Publication of KR101801971B1 publication Critical patent/KR101801971B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/022—Material
    • H01H2201/032—Conductive polymer; Rubber
    • H01H2201/036—Variable resistance

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

A contact portion provided inside the switch; A moving unit which moves in a predetermined direction according to ON / OFF control of the switch within the switch and contacts or separates from the contact unit; And a variable resistor which is provided between the moving part and the contact part and whose resistance value changes as the moving part moves.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a starting current prevention switch capable of preventing an excessive starting current generated in a switch contact portion through a variable resistor during a switch operation.

Switches are used extensively in various devices as well as in electronic devices. In general, the device is provided for electrical short-circuiting and disconnection. Due to the characteristics of such a switch, a momentary current flows instantaneously at the moment of short-circuit and disconnection. In this case, momentary disconnection of the current will not have a significant effect on the device connected to the switch.

However, if the switch is short-circuited and momentary current flows, it may affect the durability of the electrical devices connected to the switch. In particular, when the switch is short-circuited, a starting current is generated. The term "starting current" refers to a current flowing when a power source is applied to an electric device such as a motor in a stationary state, which means a current flowing in a magnitude of 5 to 8 times the current value in a normal operating state.

Therefore, the fuse provided in the electric device is damaged or the carbon film is formed due to the excessive starting current as described above, which adversely affects the durability of the electric device. Therefore, in order to prevent the above-mentioned problems, various techniques have been studied. However, in a switch disclosed in JP 2001-0046970 A "switch having an overcurrent breaker ", a contact point is attached to the bimetal to serve as a switch circuit. And an overcurrent interrupter having an overcurrent cutoff function for allowing the transformed state to be interrupted while the current is interrupted.

However, according to the above-described technique, the overcurrent generated during the operation of the switch can be shut off, but the start-up current generated when the switch is short-circuited can not be blocked.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

KR 2001-0046970 A

An object of the present invention is to provide a starting current prevention switch capable of preventing a malfunction of a switch by preventing a generation of a carbonized film by lowering a starting current generated at the time of switch-on initialization through a variable resistor.

According to an aspect of the present invention, there is provided a starting current prevention switch including: a contact portion provided inside a switch; A moving part which moves in a predetermined direction according to ON / OFF control of the switch inside the switch and contacts the contact part or is separated from the contact part and has a rack gear structure formed on one surface thereof; And a variable resistor having a dial of a pinion gear structure provided between the moving portion and the contact portion and meshing with the rack gear structure of the moving portion and having a resistance value changed by rotation of the dial as the moving portion moves; .

The moving part is spaced apart from the contact part when the switch is turned off, and is moved in a predetermined direction during the switch-on control and is brought into contact with the contact part.

And the variable resistor has a maximum resistance value when the movable portion contacts the contact portion.

delete

The variable resistor is contacted with the moving part, and after the moving part and the contact part are contacted, the moving part rotates as the moving part is moved in a predetermined direction, and the resistance value is gradually decreased.

The moving part is in contact with the contact part at the time of switch-on, and moves in a predetermined direction at the time of switch-off control, and is spaced apart from the contact part.

delete

The variable resistor is spaced apart from the moving part and rotates as the moving part is moved in a predetermined direction after the moving part is separated from the contact part, so that the resistance value gradually increases.

The following effects can be obtained by using as described above.

First, an excessive starting current generated in the switch can be prevented, so that it is possible to prevent the switch carbon film, thereby ensuring the robustness of the switch.

Secondly, as the current gradually increases due to the variable resistance, it is possible to prevent the durability of the switch from being deteriorated due to a sudden current change.

1 is a configuration diagram of a starting current prevention switch according to an embodiment of the present invention
2 is an operational state diagram of the starting current prevention switch according to the embodiment of the present invention
FIG. 3 is a graph showing the start-up current comparison graph according to the embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in Fig. 1, the starting current prevention switch according to the present invention includes a contact portion 10 provided inside a switch; A moving part 20 which moves in a predetermined direction according to ON / OFF control of the switch within the switch and contacts the contact part 10 or is separated from the contact part 10 and has a rack gear structure formed on one surface thereof; And a dial of a pinion gear structure provided between the moving part (20) and the contact part (10) and meshing with the rack gear structure of the moving part (20), and as the moving part And a variable resistor (30) whose resistance value is changed by rotation of the dial.

The contact portion 10 is fixed to the inside of the switch and is made of a material which can be electrically energized. When the switch 20 is turned on or off, the movable unit 20 is in contact with or away from the contact unit 10 and is electrically conductive. I.e., in a direction in which the contact portion 10 is located, and is brought into contact with the contact portion 10 to be energized. On the other hand, when the switch is turned off, the moving part 20 moves in a predetermined direction, that is, in a direction away from the contact part 10, and is disconnected from the contact part 10. Here, the preset direction may be set in various directions according to the structure of the switch, but for miniaturization of the switch and reliable operation, it is most preferable to move in a straight line both directions according to the switch on / off control as shown in FIG. 2 .

The starting current prevention switch according to the present invention includes a variable resistor 30 between the moving part 20 and the contact part 10 as shown in FIG. 30 is used to reduce the magnitude of the starting current generated at the beginning of the switch-on and prevent the starting current, the value of the variable resistor 30 is reduced again so that the circuit operates normally.

A detailed operation state diagram of the starting current prevention switch can be seen from FIG. Referring to FIG. 2 (a), as described above, during the switch-on control, the moving unit 20 moves in a predetermined direction and is brought into contact with the contact unit 10, . 2 (a), the variable resistor 30 is also brought into contact with the moving part 20 and the contact part 10. In this case, the value of the variable resistor 30 is set to the value of the variable resistor 30, The maximum resistance value that can be obtained.

This is because, when the resistance value is increased, the value of the starting current generated when the moving part 20 contacts the contact part 10 can be reduced. Therefore, the maximum value range of the variable resistor 30 should be selected in consideration of the rated current of the device to which the starting current prevention switch according to the present invention is applied. If the value is set to a too small value, the magnitude of the starting current to be achieved in the present invention will not be reduced. If the value is set too large, the power loss and heat generation caused by the variable resistor 30 become large. It is preferable to set the maximum value of the variable resistor 30 appropriately in consideration of the point.

As described above, the starting current is a current instantaneously generated when the switch is turned on. Therefore, since the starting current does not occur after a predetermined time has elapsed, it is inefficient to maintain the resistance value of the variable resistor 30 at the maximum value even in this case. The reason for this is that the large resistance value means that the power loss lost in the variable resistor 30 is large, so that the power value lost in the switch is increased and the heat generated in the switch is increased.

Therefore, in the present invention, the resistance value of the variable resistor 30 is gradually decreased after the moving part 20 is in contact with the contact part and the switch is turned on. The operation state inside the concrete switch is shown in FIG. 2 (b). 2 (a) and 2 (b), the moving part 20 is in contact with the contact part 10 even after the moving part 20 moves in a predetermined direction ). ≪ / RTI > It can be seen that the variable resistor 30 rotates in conjunction with the movement of the moving part 20. [ More specifically, a rack gear structure is formed on one surface of the moving part 20, and the variable resistor 30 has a dial having a pinion gear structure. As the moving part 20 moves, And the pinion gear structure of the variable resistor 30 are mated with each other, so that the dial of the variable resistor 30 is rotated. The resistance value is changed by the rotation of the dial.

The variable resistor 30 has various shapes because it is a device widely used in the past. As one example thereof, the present invention proposes a variable resistor 30 whose resistance value varies according to the rotation of the device, as shown in Figs. 1 and 2. Accordingly, when the variable resistor 30 is used, the variable resistor 30 also rotates in the clockwise direction as shown in FIG. 2 (b) as the movable part 20 is continuously moved in a predetermined direction The resistance value of the variable resistor 30 is also changed. As described above, since the value of the variable resistor 30 is preferably reduced after the switch is turned on, when the start-up current prevention switch according to the present invention is formed, the resistance value decreases in the clockwise direction It may be preferable to use a variable resistor 30 having a variable resistance.

The operation states of the switches described so far are all operating states when the switch is turned on. However, since the resistance value of the variable resistor 30 continuously decreases after the switch is turned on, when the switch is turned on again after the switch is turned off, The resistance value of the resistor 30 can not be maintained at the maximum value. Therefore, there is a disadvantage that the starting current can not be prevented when the switch is operated again after all.

In order to prevent this, in the present invention, when the switch is turned off, the resistance value of the variable resistor 30 can be increased again to its maximum value. Specifically, the switch operation state is shown in FIG. 2 (c), when the switch-off control is performed, the moving part 20 moves in a predetermined direction (the direction of the arrow in FIG. 2 (c)) and is separated from the contact part 10.

In this case, since the moving part 20 moves in a direction opposite to the direction in which the switch is turned on, when the starting current prevention switch structure according to the present invention is used, the variable resistor 30 is opposed to when the switch is turned on Direction. In other words, when comparing FIG. 2 (b) and FIG. 2 (c), it can be seen that the variable resistor 30 rotates in the clockwise direction in the ON control and in the counterclockwise direction in the OFF control. Therefore, as described above, the structure of the switch shown in FIG. 2 (c) can be satisfied by using the variable resistor 30 whose resistance decreases gradually in the clockwise direction.

As a result, when the variable resistor 30 is used, the movable portion 20 moves away from the contact portion 10 and the resistance value of the variable resistor 30 is gradually increased. As a result, The resistance value of the variable resistor 30 will be changed to the maximum value again. Even if the switch 30 is again turned on after the OFF control, the resistance value of the variable resistor 30 will be at the maximum value. The starting current can be prevented as described in the explanation.

FIG. 3 is a graph showing a start-up current comparison according to the present invention. As can be seen from FIG. 3, when the variable resistor 30 proposed in the present invention is not applied, it can be confirmed that the value of the starting current is larger than the value of the normal current at the time when the switch is turned on. However, in the case where the starting current prevention switch according to the present invention is used, it can be confirmed that the starting current is kept smaller than the normal current, so that the carbon film phenomenon caused by the excessive starting current can be prevented. Also, since the resistance value of the variable resistor 30 decreases after the turn-on, the value of the current finally converges toward the value of the normal current, so that the operation of the electric devices connected to the switch will not be affected.

Although the present invention has been shown and described with respect to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. It will be obvious to those who have knowledge of.

10: contact part 20: moving part
30: Variable resistance

Claims (8)

A contact portion provided inside the switch;
A moving part which moves in a predetermined direction according to ON / OFF control of the switch inside the switch and contacts the contact part or is separated from the contact part and has a rack gear structure formed on one surface thereof; And
A variable resistor having a dial of a pinion gear structure provided between the moving portion and the contact portion and meshing with the rack gear structure of the moving portion and having a resistance value changed by rotation of the dial as the moving portion moves; Including a starting current prevention switch. The method according to claim 1,
The moving unit includes:
And when the switch is turned off, the switch is spaced apart from the contact portion, and moves in a predetermined direction when the switch is turned on, so that the switch contacts the contact portion. The method of claim 2,
The variable resistor comprises:
And has a maximum resistance value when the moving part contacts the contact part. delete The method of claim 2,
The variable resistor comprises:
Wherein the contact portion is in contact with the moving portion and rotates as the moving portion is moved in a predetermined direction after the moving portion contacts the contact portion, so that the resistance value gradually decreases. The method according to claim 1,
The moving unit includes:
Wherein the switch is in contact with the contact portion when the switch is turned on, and moves in a predetermined direction when the switch is turned off, and is spaced apart from the contact portion. delete The method of claim 6,
The variable resistor comprises:
And the resistance value is gradually increased as the moving unit moves away from the moving unit and the moving unit is moved in a predetermined direction after the moving unit is separated from the contact unit.
KR1020150185836A 2015-12-24 2015-12-24 Switch for preventing of starting current KR101801971B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150185836A KR101801971B1 (en) 2015-12-24 2015-12-24 Switch for preventing of starting current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150185836A KR101801971B1 (en) 2015-12-24 2015-12-24 Switch for preventing of starting current

Publications (2)

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KR20170076856A KR20170076856A (en) 2017-07-05
KR101801971B1 true KR101801971B1 (en) 2017-11-28

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005019100A (en) 2003-06-24 2005-01-20 Omron Corp Switch device and driving device using this

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005019100A (en) 2003-06-24 2005-01-20 Omron Corp Switch device and driving device using this

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