KR20090131358A - Varistor device - Google Patents

Abstract

PURPOSE: A varistor device is provided to rotate a slider by a restoring force of a spring when a varistor is overheated by an over voltage or an over current, thereby obtaining superior short prevention effect. CONSTITUTION: A rotating axis(205) is inserted into one end of a slider(170). The rotating axis is protruded from the inside of a case(110). The slider is rotated at the rotating axis. A substrate unit of the slider is inserted into a space formed by a second withdrawing terminal plate(150) and the other side of a varistor(120). A start point of a spring is formed on the slider. The end point of the spring is formed on the case. When one end of the second withdrawing terminal plate is separated from the other side of the varistor, the slider is rotated by the restoring force of the spring.

Description

Varistor device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a varistor apparatus which prevents a short circuit phenomenon in which the lead terminal plate is recontacted when the varistor is damaged by overcurrent and overvoltage.

Varistors are used to prevent damage or damage to electrical and electronic equipment due to lightning surges or switching surges caused by the operation of relays.The varistors are burned out when a surge exceeding the absorption capacity is introduced. When applied, the varistors operate with a low resistance load, causing a short circuit accident.

Patent No. 10-0826238 (a case in which a varistor and a varistor are housed) has been invented by the applicant of the present invention.

1 is an assembled perspective view for explaining the outline of the invention of Patent No. 10-0826238.

In the varistor apparatus shown in FIG. 1, the varistor 60 includes a varistor body having first and second external terminals formed on an outer surface thereof, a plate-shaped first drawing terminal plate 62 coupled to the first external terminal, and the second external terminal. A plate-shaped second lead-out terminal plate 63 coupled to the terminal, and an inner space portion of the case is provided with a partition surface 15 for dividing a portion of the inner space portion into two space portions, and the varistor body is The first drawing terminal plate 62 is inserted into the one space portion divided by the partition surface, and the first drawing terminal plate 62 is formed in the case and drawn out to the outside through the first through portion communicating with the work space. ) Is formed in the case and drawn out to the outside through the second through-hole communicating with the other space.

In addition, an inclined portion is formed in the second lead-out terminal plate 62, a front end portion of the inclined portion is coupled to the second external terminal, and an extension portion parallel to and spaced apart from the partition surface 15 is formed at a rear end portion of the inclined portion. It is drawn out to the outside through the second through portion, and the other space portion by the compression extension of the spring 30, 31 and the spring 30, 31, one end is fixed to the inside of the case The slider 40 which moves along a partition surface and has an opening part is further provided, and the wall of the said opening part contacts the inclined surface.

In addition, the slider 40 has a plate shape and is formed with spring insertion grooves 41 and 42 into which the springs 30 and 31 are inserted at both side ends, and the restoring force of the springs 30 and 31 is formed. It is advanced back and forth on the face 15.

In addition, the first coupling material coupling the first drawing terminal plate 62 and the first external terminal has a higher melting point than the second coupling material coupling the second drawing terminal plate 63 and the second external terminal. .

In the varistor device configured as described above, when a surge of more than the critical resistance flows into the varistor 60, the second extraction terminal plate 63 is melted with a binder to be separated from the external terminal. At this time, the elastic force is applied to the second drawing terminal plate 63 by the slider 40 shot by the springs 30 and 31 to increase the separated width between the second drawing terminal plate 63 and the external terminal, When the separated width becomes wider in this way, the springs 30 and 31 compressed in the slider 40 are extended so that the slider 40 is moved backwards, so that the second extraction terminal plate 63 and the external terminal are separated. It acts as a divider to prevent re-contact.

Therefore, incomplete contact between the second drawing terminal plate 63 and the external terminal can be prevented from proceeding to a short circuit accident.

In addition, as the slider 40 moves backward, the protrusion 43 of the slider 40 activates the contact switch 51 to turn on the LED 57, and the manager sees that the LED is turned on and turns on the varistor. Replace it.

The varistor device configured as described above is operated by the springs 30 and 31 inserted into the spring insertion grooves 41 and 42 of the slider 40 so that the second extraction terminal plate 63 is connected to the varistor 60 and the ashes. Prevent contact and short circuit.

However, when foreign matter accumulates in the spring insertion grooves 41 and 42 of the slider 40, or when projections are formed during molding, excessive compression is applied to the springs 30 and 31 so that the second even in the normal state. There exists a problem of pressing the connection part of the drawing-out terminal board 63 and the external terminal of a varistor main body.

In addition, when the slider 40 is elastically slid by the springs 30 and 31, the diaphragm 15 and the slider 40 make surface contact, and a lot of friction occurs. In particular, when deformation occurs in the diaphragm 15 and the slider 40 made of a synthetic resin material when the varistor 60 is overheated, the slider 40 is not smoothly moved on the diaphragm 15. Cannot be achieved.

In addition, since the spring inserting grooves 41 and 42 are formed in the slider 40, the springs 30 and 31 must be inserted into the spring inserting grooves 41 and 42. In addition, there are many factors that can lead to defects.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and an object of the present invention is to reduce the area in which the slider is in contact with the member of the case so as to prevent a short circuit as soon as the lead-out terminal plate is separated from the varistor body.

Another object of the present invention is to simplify the structure of the slider to simplify the manufacturing and assembly process, and to prevent deformation during overheating of the varistor.

A feature of the present invention for solving the above technical problem is that the varistor is installed inside the case, the first drawing terminal plate having one end coupled by a first binder having a first melting point on one side of the varistor is connected, A second lead terminal plate having one end coupled to a second binder having a second melting point lower than the first melting point is connected to the other side, and the other end of the first lead terminal plate and the second lead terminal plate is connected to the case. In the varistor device protruding to the outside of the: The second lead terminal plate is formed between the one end and the other end of the second lead terminal plate inclined to include an elastic portion having a restoring force to move away from the other side of the varistor, A rotating shaft protruding from the inside of the case is inserted at one end, and rotates about the rotating shaft, and the other side of the varistor and the first A slider having a substrate portion to be inserted into a space formed by the two lead terminal plates; A start point formed on the slider and having a spring installed with an end point having a compressive restoring force formed on the case, and when one end of the second lead terminal plate is separated from the other side of the varistor, the slider of the spring Rotation by the restoring force prevents a short circuit between the one end of the second lead terminal plate and the other side of the varistor.

Further, in the present invention, the other end of the substrate portion of the slider is formed with a head protruding in the longitudinal direction of the substrate portion, the case is opened and closed state of the contact portion and the contact portion of the contact portion is opened and closed by the rotation of the head portion It is preferable that the withdrawal terminal for transmitting to the outside is installed.

In addition, in the present invention, the case has a through hole formed therein, and the side surface of the slider has a mark indicating the rotational state of the slider is shown, it is preferable that the rotational state can be observed from the outside through the observation hole. Do.

In addition, in the present invention, the second drawing terminal plate includes a drawing piece and a joining piece, wherein the drawing piece is inserted into an insertion groove formed in the case to protrude out of the case, and an inner end of the drawing part. And a support portion bent from the support portion, and a protrusion protruding inwardly from the upper end surface of the support portion, wherein the joining piece is formed of a top plate portion formed of a strip-shaped plate member in which a lower surface of one end is welded to the upper surface of the protrusion portion, and one side surface of the upper plate portion. It is preferable to include an elastic part which is formed to protrude from the other side of the varistor from the end of the elastic member is bent horizontally so as to be coupled to the other side of the varistor and formed as a whole inclined.

In addition, in the present invention, it is preferable that a curved surface is formed on the elastic portion.

According to the present invention having the above technical problem and configuration, when the varistor is overheated by an overvoltage or overcurrent due to a surge, such as a lightning strike, the slider 170 when the second lead terminal plate 150 is spaced apart from the outer terminal of the varistor. Since the narrow area is rotated by the restoring force of the spring 220 while contacting the varistor, the slider 170 is easily rotated, and the short circuit prevention effect is excellent.

In addition, since the structure of the slider 170 is simple, there is little fear of failure, the manufacturing process is simple, and the manufacturing cost becomes low.

Hereinafter, an embodiment of the present invention according to the accompanying drawings will be described in detail.

Figure 2 is a perspective view showing the overall shape of one embodiment of the present invention, Figure 3 is an exploded perspective view of one embodiment of the present invention, Figure 4 is a perspective view of a state in which the second case is removed in an embodiment of the present invention.

The varistor device 100 shown in FIGS. 2 to 4 has an accommodating space formed therein, and side walls 111, 112, and 113 protruding from the bottom surface 115 and the outer circumferential surface of the bottom surface 115. , 114, a first case 110 in which supports are formed to prevent flow of a plurality of engagement holes formed adjacent to the sidewalls and the varistor 120 seated on the bottom surface 115, and a first case ( Varistor 120 is installed in the receiving space inside the 110, the first lead terminal plate 130, the second lead terminal plate 150, respectively installed on the outer terminals of both sides of the varistor 120, the varistor When the 120 is overheated and the second lead terminal plate 150 is separated from the contact terminal of the varistor 120, the varistor 120 and the second lead terminal plate 150 are inserted between the varistor 120 and the second lead terminal plate 150. 2, the slider 170 for preventing the lead-out terminal plate 150 from being short-circuited, the rotating parts for rotating the slider 170, and the inner accommodating hole of the first case 110. The cover comprises a second case 180 that protects the components inside.

Through holes are formed in the second case 180, and fasteners 191, 192, and 193 are inserted into the through holes, and are inserted into and coupled to the engaging holes of the first case 110. At this time, the fastener may be used a variety of fastening means such as countersunk screws, bolts or pins.

An observation hole 103 is formed in the side wall 111 of the first case 110 to observe whether the slider 170 is in a fixed position or a rotated state. In addition, end portions of the first drawing terminal plate 130 and the second drawing terminal plate 150 are drawn out to the side wall 113 opposite the side wall 113 on which the observation hole 103 is formed, and an insertion groove ( 201) and 202 are formed. The height of the sidewall between the insertion groove 201 and the insertion groove 202 is formed lower than the other portion, the support wall 203 is formed inside the insertion groove 202 so that the second lead terminal plate 150 is supported. .

In addition, a rotation shaft 205 on which the slider 170 rotates is formed on the bottom surface 115 of the first case 110.

In addition, an insertion groove is formed in the side wall 114 of the first case 110 to which an external socket connected to the lead terminal 211 of the contact socket 210 is formed, and the side wall 114 and the side wall 112 are formed. Windshields 117, 119 are formed in the adjacent portion in contact with the side wall 113 to discharge heat, gas, etc. generated in the varistor 120 to the outside. In addition, a gap is formed between the side wall 113 and the second case 180, and heat, gas, and the like are discharged to the outside through the gap.

In addition, the bottom surface 115, the insertion plate 221, 222 to which the PCB substrate 212 of the contact socket 210 can be inserted is formed vertically. The insertion plate 221, 222 is a slot is formed so that the PCB board 212 is inserted and inserted.

A contact 213 is installed on the front surface of the PCB board 212, and a lead terminal 211 is installed on the rear surface. The contact 213 is provided with a protrusion that is movable by the rotation of the slider 170, the pressing operation of the protrusion is converted into an electrical signal and transmitted to the lead terminal 211. The PCB substrate 212 is formed with a contact structure for generating an electrical signal by the flow of the power supply and the protrusion of the contact 213.

When the slider 170 is rotated by the configuration as described above, it is possible to directly observe whether the slider 170 is rotated from the outside through the observation hole 103 as well as the remote circuit connected to the lead terminal 211.

Varistor 120 has a metal oxide and the inner terminal is laminated, the outer terminals are formed on both outer surfaces, the outer terminal on both sides of the first drawing terminal plate 130, the second drawing terminal plate 150 by a binder material ) Is combined. At this time, the melting point of the binding material for coupling the first lead terminal plate 130 and the external terminal is selected as a material higher than the melting point of the second lead terminal plate 150, when the temperature of the varistor 120 is high, the first lead terminal plate The second lead terminal plate 150 is separated from the external terminal before the 130. The binder that couples the first lead-out terminal plate 130 to the external terminal is lead having a melting point of 270 ° C., and the binder that couples the second lead-out terminal plate 150 and the external terminal has a melting point of 100 ° C. to 200 ° C. It is preferable that the material is impurity added to lead.

The first drawing terminal plate 130 is coupled to an inner external terminal of the varistor 120 adjacent to the bottom surface 115 of the first case 110. In this case, the first lead terminal plate 130 is inserted into the insertion groove 201 and the support portion 132 bent from the inner end of the lead portion 131 and the lead portion 131 protruding out of the first case 110. ), A coupling part 133 protruding from an inner outer terminal of the varistor 120 at a lower surface of the support part 132. Coupling portion 133 is coupled to the inner outer terminal by a bonding material.

The second drawing terminal plate 150 is composed of a drawing piece 151 and a joining piece 155. The withdrawal piece 151 is inserted into the insertion groove 202 to protrude to the outside of the first case 110, the support part 153 bent from the inner end of the withdrawal part 152, and the support part. It consists of a protrusion 154 protruding inward from the top surface of the (153). In addition, the joining piece 155 has a bottom surface of the first case 110 from one side of the upper plate portion 156 and the upper plate portion 156 made of a strip-shaped plate member having one end of the lower surface welded to the upper surface of the protrusion 154. Downward projection 157 protruding toward the protrusion and is formed to protrude toward the outer outer terminal of the varistor 120 from the other side of the upper plate 156, the coupling portion 159 is coupled to the outer terminal of the varistor 120 at the end It is made of an elastic portion 158 made of an elastic member that is bent horizontally so as to be inclined as a whole.

In addition, the slider 170 is made of an insulating material such as synthetic resin, and is inserted into a space formed by the upper plate portion 156, the elastic portion 158, and the outer surface of the varistor 120 of the second lead terminal plate 150. It consists of a plate-shaped board part 171 which is substantially L-shaped, and the head part 173 formed in the front end part of the board | substrate part 171. As shown in FIG. The through hole 174 is formed in the rear end of the substrate portion 171, the rotating shaft 205 penetrates through the through hole 174, and the spring fixture is vertical to the upper surface adjacent to the side of the substrate portion 171. 175 is formed, the start end of the spring 220 is fixed to the spring fixture 175, the end of the spring 220 is supported adjacent to the side wall 112 or side wall 112 of the first case 110 It is fixed to the member 221.

In addition, the head 173 of the slider 170 is formed substantially vertically so as to protrude to both sides about the front end of the substrate portion 171, and the second drawing-out terminal plate 150 has an outer outer terminal of the varistor 120 on the side. Separated from the identification mark is shown to identify whether the slider 170 is rotated or to maintain a normal state, this identification mark can be seen through the observation hole (103).

5 is a front view of another embodiment of the bonding piece of the present invention.

When the coupling part 159 of the second lead terminal plate 130 is separated from the external terminal of the varistor 120, the temperature of the varistor 120 is rapidly increased due to a transient high transient current and voltage. However, there is a case where the external terminal and the coupling unit 159 of the varistor 120 are separated by a temperature gradually increasing due to continuous transient current and voltage. When the external terminal and the coupling portion 159 of the varistor 120 are separated by a gradually increasing temperature, sludge (sewage) is present on the external terminal of the varistor 120, which hinders the rotation of the slider 170. .

The bonding piece 155 ′ shown in FIG. 5 has a difference in the elastic piece 158 and the bonding piece 155 shown in FIGS. 1 to 4, and forms the same structure in other portions.

The curved surface is formed on a part of the elastic portion 158 'so that the slider 170 can easily cross the sludge-attached portion during the rotational movement of the slider 170. The slider 170 operates smoothly even when sludge is formed on the external terminal of the varistor 120 due to the structure of the curved surface of the elastic portion 158 ′.

Hereinafter, an operation process of an embodiment of the present invention will be described.

When the overvoltage and overcurrent are introduced into the varistor 120 and overheated, the outer outer terminal and the second outgoing terminal plate 150 outside the melting point of the coupling material for coupling the inner outer terminal of the varistor 120 and the first outlet terminal plate 130 to each other. ), Because the melting point of the binding material for bonding the low coupling member is separated from the varistor 120 before the first drawing terminal plate 130 is separated from the varistor 120, the second drawing terminal plate ( Since the 150 has a restoring force to be restored in a direction away from the bottom surface 115 of the first case 110 (outward direction), the elastic part 158 and the coupling part 159 of the second lead terminal plate 150 are provided. Is spaced apart from the outer surface of the varistor 120. When the elastic part 158 and the coupling part 159 of the second lead terminal plate 150 are spaced apart from the outer surface of the varistor 120, the spring fixture 175 is pulled by the restoring force of the spring 220, the slider. 170 rotates about the rotation shaft 205, and the head 173 of the slider 170 eventually rotates in the counterclockwise direction in FIG. In the state where the slider 170 is rotated, the substrate portion 171 is inserted into a gap between the coupling portion 159 and the outer surface of the varistor 120 and is formed of an insulating material, so that the second lead terminal plate 150 and The outer surface of the varistor 120 is in contact again to prevent the phenomenon of short circuit.

In addition, when the slider 170 is rotated, the front end of the head 173 presses the protrusion of the contact 213 of the contact socket 210, so that an electrical signal is transmitted to the lead terminal 213, and external from the lead terminal 213. The rotation of the slider 170 may be detected even at a remote location by the electrical signal drawn out.

In addition, when the slider 170 is rotated, the head 173 is rotated so that the mark formed on the side can be directly identified from the outside through the observation hole 103.

1 is an assembled perspective view for explaining the outline of the invention of Patent No. 10-0826238.

Figure 2 is a perspective view showing the overall shape of an embodiment of the present invention.

3 is an exploded perspective view of one embodiment of the present invention.

Figure 4 is a perspective view of a state in which the second case is removed in an embodiment of the present invention.

5 is a front view of another embodiment of the bonding piece of the present invention.

Claims (5)

A varistor is installed inside the case, and a first drawing terminal plate having one end coupled by a first binder having a first melting point on one side of the varistor is connected, and a second melting point lower than the first melting point on the other side of the varistor. In the varistor device having a second lead terminal plate having one end coupled by a second coupling member having a second end, and the other end of the first lead terminal plate and the second lead terminal plate protrudes out of the case: The second lead terminal plate includes an elastic portion formed to be inclined between one end and the other end of the second lead terminal plate to have a restoring force away from the other side of the varistor, A slider having a substrate portion inserted into a rotation shaft protruding from the inside of the case at one end thereof, rotating about the rotation shaft, and inserted into a space formed by the other side of the varistor and the second lead terminal plate; A start point is formed on the slider and a spring is installed to have a restoring force compressed at an end point formed on the case; When one end of the second lead terminal plate is separated from the other side of the varistor, the slider is rotated by the restoring force of the spring to be inserted and shorted between one end of the second lead terminal plate and the other side of the varistor. Varistor device, characterized in that is prevented. 2. The contact part of claim 1, wherein a head portion protruding in the longitudinal direction of the substrate portion is formed at the other end of the substrate portion of the slider, and the case has a contact portion in which the contact is opened and closed by the rotation of the head portion, and an opening / closing state of the contact portion of the contact portion. Varistor device, characterized in that the withdrawal terminal for transmitting to the outside is installed. The method of claim 2, wherein the through hole is formed in the case, the head of the slider is shown on the side of the indicator indicating the rotation state of the slider is characterized in that the rotation state can be observed from the outside through the observation hole Varistor device. The method according to any one of claims 1 to 3, wherein the second drawing terminal plate includes a drawing piece and the joining piece, the drawing piece is inserted into the insertion groove formed in the case and protruding out of the case; And a support portion bent from an inner end of the lead portion, and a protrusion portion protruding inwardly from an upper end surface of the support portion, wherein the joining piece includes an upper plate portion formed of a strip-shaped plate member in which a lower surface of one end is welded to an upper surface of the protrusion portion; Varistors characterized in that it comprises an elastic portion made of an elastic member which is formed to protrude from the one side of the upper portion of the varistor and the other side of the varistor, the end portion is bent horizontally so as to be coupled to the other side of the varistor, the overall inclination Device. The varistor device according to claim 4, wherein a curved surface is formed on the elastic portion.

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