Relay with arc guide blocking structure

Abstract

The invention discloses a relay with an arc guiding and blocking structure, which not only can effectively extinguish an arc, but also can prevent other components from being damaged. A relay having an arc guide blocking structure according to an aspect of the present invention may include a fixed contact, a movable contact, a housing, and an arc chamber, and may further include an arc guide pin.

Description

Technical Field

[0001] The present invention relates to a relay, and more particularly to a relay with an arc guiding and blocking structure, which can effectively extinguish an arc and prevent other components from being damaged. Background Art

[0002] A direct current relay is a device that uses the principle of electromagnets to achieve mechanical drive or transmit current signals. It is also called an electromagnetic switch and is generally classified as an electrical circuit switching device.

[0003] A DC relay is a device used to connect and disconnect power and is widely used in industries, homes, and automobiles.

[0004] In particular, electric vehicles (Electric Vehicles) such as hybrid vehicles, fuel cell vehicles, golf carts and electric forklifts are equipped with an electric vehicle relay (Electric Vehicle Relay) for supplying battery power to power generation devices and electrical devices and blocking the supply of battery power to power generation devices and electrical devices. The electric vehicle relay is one of the vital core components of electric vehicles.

[0005] Figure 1 FIG. 1 is a cross-sectional view showing a DC relay according to an embodiment of the related art.

[0006] Reference Figure 1 The DC relay 1 can be roughly divided into an arc extinguishing module 10 and a driving module 20 .

[0007] The arc extinguishing module 10 is connected to an external device to supply power.

[0008] The driving module 20 controls the opening and closing of contacts using electrical signals, thereby supplying power to the arc extinguishing module 10 connected to an external device or blocking the power supply to the arc extinguishing module 10 .

[0009] At this time, an iron core portion including a movable iron core 23 and a fixed iron core 25 is provided inside the driving module 20 , and includes a shaft 21 , and can be distinguished from the arc extinguishing module 10 by a support plate 26 .

[0010] In the relay 1 , the arc extinguishing module 10 is normally energized by the contact between the fixed contact 11 and the movable contact 12 .

[0011] The fixed contact 11 is connected to an external device to supply power. The movable contact 12 is located at the lower end of the fixed contact 11 and supplies or blocks power to the external device by contacting or separating from the fixed contact 11 .

[0012] The movable contact 12 is coupled to the shaft 21 of the driving module 20 to perform contact and separation with the fixed contact 11 through switching.

[0013] In other words, the flow of power through the DC relay 1 is allowed or blocked by the contact and separation of the fixed contact 11 and the movable contact 12 .

[0014] As described above, the movement of the movable contact 12 is achieved by the shaft 21 of the driving module 20 .

[0015] Furthermore, a contact pressure spring 13 is provided to apply an elastic force to the movable contact 12 when the fixed contact 11 and the movable contact 12 come into contact with or separate from each other, thereby opening and closing the relay 1 .

[0016] In other words, a contact pressure spring 13 is provided below the movable contact 12 to apply elastic force to the movable contact 12 in a direction away from the fixed contact 11 when the movable contact 12 contacts the fixed contact 11 .

[0017] At this time, the contact pressure spring 13 is located between the movable contact 12 and the upper side of the shaft 21 .

[0018] The contact pressure spring 13 not only maintains the contact state between the movable contact 12 and the fixed contact 11 at a pressure above a certain level, but also reduces the impact force when the movable iron core 23 contacts the cylinder (not shown) by reducing the moving speed of the movable iron core 23 and the shaft 21 when the movable contact 12 is separated from the fixed contact 11, thereby suppressing the generation of noise and vibration.

[0019] In addition, refer to Figure 2 and Figure 3 In the relay structure, when the fixed contact 11 and the movable contact 12 are separated, an arc A is generated between the fixed contact 11 and the movable contact 12 .

[0020] This arc is the flow of high-voltage, high-temperature electric current.

[0021] Therefore, it is necessary to quickly discharge the generated arc from the DC relay 1 through a predetermined path before the generated arc affects other components.

[0022] A discharge path for the arc is formed by a magnet (magnetic body) provided in the DC relay 1 .

[0023] The magnet forms a magnetic field inside the space where the fixed contact 11 and the movable contact 12 are in contact. The electromagnetic force generated by the formed magnetic field and the flow of current forms a discharge path for the arc A.

[0024] Furthermore, the fixed contact 11 and the movable contact 12 are provided in a semi-enclosed space called an arc chamber 15 .

[0025] Therefore, the arc A generated by the contact and separation between the fixed contact 11 and the movable contact 12 is also formed inside the arc chamber 15 .

[0026] The generated arc A extends in the space inside the arc chamber 15 and is extinguished.

[0027] In other words, the arc A is generated while the movable contact 12 of the DC relay 1 is moving away from the fixed contact 11 , and the generated arc A is extinguished while its length increases within the chamber space.

[0028] Furthermore, when an arc is generated, a large amount of heat is generated, and the generated heat is discharged to the outside of the arc chamber 15 through the arc chamber 15 and the magnet.

[0029] As described above, the longer the extension length of the generated arc A is, the better the arc extinguishing effect is.

[0030] If the generated arc A fails to extend to an appropriate length, the arc A will continue to stay at the shortest distance between the fixed contact 11 and the movable contact 12 , which may eventually lead to product damage.

[0031] For example, the arc A retained between the fixed contact 11 and the movable contact 12 and the heat generated by the arc A may also cause the contact portion between the movable contact 12 and the fixed contact 11 to melt, resulting in welding between the movable contact 12 and the fixed contact 11 .

[0032] In addition, since the directionality of the generated arc A is uncertain, the shaft 21 or the contact pressure spring 13 may be affected during the arc extinguishing process.

[0033] In other words, the arc A may move toward the shaft 21 or the contact pressure spring 13 during the arc extinguishing process. Due to the frequent contact of the arc A, the mechanical life of the shaft 21 and the contact pressure spring 13 is inevitably shortened (see Figure 3 ).

[0034] Therefore, as far as the DC relay 1 is concerned, the following improvements need to be made to the relay 1: the arc A generated when the movable contact 12 is away from the fixed contact 11 can be fully elongated and extinguished, and the arc A can be prevented from contacting components such as the shaft 21 or the contact pressure spring 13, thereby improving the mechanical life and electrical reliability of the components. Summary of the Invention

[0035] Problems to be solved by the invention

[0036] The present invention, which is intended to solve the above-mentioned problem, aims to provide a relay having an arc guiding and blocking structure, which can effectively extinguish an arc while preventing damage to other components.

[0037] Another object of the present invention is to provide a relay with an arc guiding and blocking structure, which can prevent the generated arc from being continuously retained at the shortest distance between the fixed contact and the movable contact.

[0038] Yet another object of the present invention is to provide a relay with an arc guiding and blocking structure, which can guide the generated arc and fully extend it.

[0039] The technical problems of the present invention are not limited to the technical problems mentioned above. Ordinary technicians in the technical field to which the present invention belongs can clearly understand other technical problems not mentioned through the following description.

[0040] Means used to solve problems

[0041] According to one aspect of the present invention, a relay having an arc guiding and blocking structure is provided.

[0042] As one embodiment, a relay with an arc guiding and blocking structure includes: a fixed contact, which is connected to an external power supply or load in a manner that allows power to be supplied; a movable contact, which is arranged at the lower part of the fixed contact in a manner that allows linear motion and contacts or separates from the fixed contact; a shell, which accommodates the movable contact and a contact pressure spring that supports the lower part of the movable contact and applies elastic force in an installation space and performs lifting and lowering movements through an axis connected to the lower part of the shell; an arc chamber, which accommodates the fixed contact, the movable contact and the shell in the chamber space; an arc guide pin, which is arranged on one side of the chamber space to guide the direction of the generated arc and extend the arc; and an arc protection portion, which surrounds the shell to block the generated arc from moving in the direction of the contact pressure spring.

[0043] At this time, the arc guide pin is configured as a magnetic body and has a columnar shape having a predetermined length and diameter, has a length longer than a widthwise length of the movable contact, and has a length in a front-to-rear direction.

[0044] As an embodiment, the arc guide pin includes: a column portion having a set length and diameter; and a head portion protruding from both ends of the column portion to form a snap-fit ​​flange.

[0045] In addition, the arc protection portion may include a first protection portion, which is a magnetic body and is disposed on a bottom surface of the movable contact to guide the direction of the arc.

[0046] As an embodiment, the first guard portion may include a first plate having the same size and shape as the bottom surface of the movable contact and configured to be in contact with the bottom surface of the movable contact.

[0047] Furthermore, the first protection portion may further include a second plate extending downward from both ends of the first plate in the longitudinal direction.

[0048] In addition, the housing includes: a main body having a box shape with an upper portion and two side openings, the installation space being formed inside the main body, and the lower portion of the main body being combined with the shaft; and a support plate partially blocking the upper side of the opening of the main body and contacting and supporting the upper surface of the movable contact.

[0049] In this case, the arc protection portion may include a second protection portion that is an insulator and covers both sides of the opening of the main body.

[0050] As an embodiment, the second protection portion includes: a first plate having a size and shape capable of covering both sides of the opening of the main body; and a second plate extending from both sides of the first plate toward the installation space.

[0051] Furthermore, convex portions are formed on both side surfaces of the outer end portion of the main body, and convex portion grooves corresponding to the convex portions are formed on the second plate. When the convex portions are combined with the convex portion grooves, the second protective portion can be detachably combined with the shell.

[0052] In addition, in an embodiment of the present invention, the arc guide pin is configured to have a spacing from the insulating plate in a direction away from the upper surface of the insulating plate, the insulating plate blocks the lower part of the chamber space and the shaft passes through the insulating plate, and the arc guide pin is configured to have a spacing from the longitudinal end of the movable contact in the longitudinal direction.

[0053] Furthermore, a protective wall portion is further provided on an upper portion of the insulating plate, and the protective wall portion supports the arc guide pin.

[0054] As an embodiment, the protective wall portion may include: a protective wall vertically formed on the upper surface of the insulating plate in a manner having a set height and width; and a rib portion obliquely extending from one side of the protective wall in a direction away from the movable contact.

[0055] According to requirements, the protective wall may be formed to extend to the height of the upper end portion of the movable contact.

[0056] Furthermore, a seating groove may be formed on one side of the rib portion, and the arc guide pin may be seated in the seating groove.

[0057] Effects of the Invention

[0058] According to the above structure, the relay with the arc guiding and blocking structure according to the present invention has the effect of effectively extinguishing the arc by arranging an arc guiding pin in the chamber space and guiding the generated arc through the arc guiding pin to extend the generated arc to a length sufficient to be extinguished.

[0059] In addition, the relay having the arc guide blocking structure according to the present invention has the effect that as the generated arc is guided by the arc guide pin and extends, the arc can be prevented from coming into contact with constituent elements such as a shaft or a contact pressure spring.

[0060] In addition, the relay with an arc guide blocking structure according to the present invention has the following effect: the mechanical life and electrical reliability of the components can be improved by blocking unexpected arcs from contacting components such as a shaft or a contact pressure spring through the arc protection portion that surrounds the shell in which the contact pressure spring is set in the installation space.

[0061] In addition, the relay with an arc guide and blocking structure according to the present invention has the following effect: as the generated arc is guided by the arc guide pin, the arc will not continue to stay at the shortest distance between the fixed contact and the movable contact, thereby preventing welding between the fixed contact and the movable contact and damage to the product.

[0062] The effects of the present invention are not limited to the above-described effects, but should be understood to include all effects that can be derived from the configuration of the invention described in the detailed description of the present invention or the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 is a diagram showing a relay according to the prior art.

[0064] Figures 2 to 3 1 is a schematic diagram illustrating an arc generated by the separation of a movable contact and a fixed contact when a relay according to the prior art is opened.

[0065] Figure 4 2 is a diagram illustrating a relay having an arc guide and blocking structure according to an embodiment of the present invention.

[0066] Figure 5 It is enlarged to show Figure 4 Diagram of the chamber space in a relay with an arc guide blocking structure.

[0067] Figure 6 FIG. 1 is a perspective view showing a portion excluding an arc chamber in a relay having an arc guide and blocking structure according to an embodiment of the present invention.

[0068] Figure 7 It is enlarged to show Figure 6 FIG. 1 is a diagram of a portion of a relay having an arc guide blocking structure provided with an arc guide pin.

[0069] Figure 8 1 is a combined cross-sectional perspective view showing a movable contact, a housing, a shaft, and an arc shield in a relay having an arc guiding and blocking structure according to an embodiment of the present invention.

[0070] Figure 9 yes Figure 7 Exploded three-dimensional diagram.

[0071] Figure 10 1 is a diagram showing that an arc generated in a relay having an arc guide and blocking structure according to an embodiment of the present invention is guided by an arc guide pin to extend and is blocked by an arc guard to be extinguished.

[0072] Figure 11 FIG. 1 is a diagram illustrating a protective wall portion of a relay having an arc guide and blocking structure according to another embodiment of the present invention. DETAILED DESCRIPTION

[0073] The best embodiment of the present invention provides a relay with an arc guiding and blocking structure, which includes: a fixed contact, which is connected to an external power source or load in a manner that allows power to be passed through; a movable contact, which contacts or separates from the fixed contact; a contact pressure spring, which supports the lower part of the movable contact and applies elastic force to the movable contact; and an arc guiding pin, which guides the direction of the generated arc and causes the arc to extend.

[0074] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. The present invention can be implemented in various forms and is not limited to the embodiments described herein. To clearly illustrate the present invention, portions not relevant to the description are omitted from the accompanying drawings, and throughout the specification, identical or similar components are given the same reference numerals.

[0075] The words and terms used in this specification and the appended claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical ideas of the present invention in order to describe one's invention in the best way, in accordance with the principle that the inventor is able to define terms and concepts.

[0076] Therefore, the embodiments described in this specification and the structures shown in the accompanying drawings correspond to a preferred embodiment of the present invention, and do not refer to all technical ideas of the present invention, so that there may be various equivalents and modifications that replace the corresponding structures from the application point of view of the present invention.

[0077] In this specification, the terms "include" or "have" are used to illustrate the existence of features, numbers, steps, actions, constituent elements, parts or their combinations recorded in the specification, rather than excluding the existence or additional possibilities of one or more other features, numbers, steps, actions, constituent elements, parts or their combinations in advance.

[0078] Unless otherwise specified, a component being “located in front of,” “behind,” “above,” or “below” another component includes not only being in direct contact with and located in front of, “behind,” “above,” or “below” the other component, but also includes being positioned with another component interposed therebetween. Furthermore, unless otherwise specified, a component being “connected to” another component includes not only being directly connected to the other component, but also including being indirectly connected to the other component.

[0079] Hereinafter, a relay having an arc guiding and blocking structure according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0080] Reference Figures 4 to 11 The relay 1 with the arc guiding and blocking structure according to the embodiment of the present invention can fully extend the arc A generated (produced) while the movable contact 120 is away from the fixed contact 110 when the relay 1 is disconnected, and effectively extinguish the arc.

[0081] In addition, the relay 1 having the arc guide and blocking structure according to the embodiment of the present invention can improve the mechanical life and electrical reliability of components by blocking the movement of the generated arc A toward the contact pressure spring 130 or the shaft 21 .

[0082] To this end, the relay 1 with an arc guiding blocking structure according to an embodiment of the present invention has a structure including an arc extinguishing module 100 and a driving module 20, which includes a fixed contact 110, a movable contact 120, a housing 140 and a plurality of contact pressure springs 130 in an arc chamber 102 having a chamber space 102a.

[0083] Furthermore, the relay 1 of the present invention includes the arc guide pin 160 and the arc shield G.

[0084] In other words, the relay 1 with an arc guiding and blocking structure according to an embodiment of the present invention includes: a fixed contact 110, which is connected to an external power source or load in a manner that allows power to be supplied; a movable contact 120, which is arranged at the lower part of the fixed contact 110 in a manner that allows linear motion and contacts or separates from the fixed contact 110; a shell 140, which accommodates the movable contact 120 and the contact pressure spring 130 that supports the lower part of the movable contact 120 and applies elastic force in the installation space 146 and performs lifting and lowering movements through the shaft 21 combined at the lower part; and an arc chamber 102, which accommodates the fixed contact 110, the movable contact 120 and the shell 140 in the chamber space 102a.

[0085] Furthermore, the relay 1 with an arc guiding and blocking structure according to an embodiment of the present invention includes: an arc guiding pin 160, which is arranged on one side of the chamber space 102a to guide the direction of the generated arc A and extend the arc A; and an arc protection part G, which has a form of surrounding the shell 140 and blocks the movement of the generated arc A toward the direction of the contact pressure spring 130.

[0086] Therefore, the arc A generated when the relay 1 is disconnected can be fully extended and extinguished, and by preventing the generated arc A from contacting components such as the contact pressure spring 130, the mechanical life and electrical reliability of the relay 1 can be improved.

[0087] Hereinafter, the components constituting the relay 1 having the arc guiding and blocking structure of the present invention will be described respectively.

[0088] like Figures 4 to 6 As shown, inside the cover frame 101, the fixed contact 110, the movable contact 120, the shell 140, the contact pressure spring 130, the arc guide pin 160 and the arc protection part G that constitute the relay 1 with the arc guide blocking structure according to an embodiment of the present invention are arranged in the arc chamber 102.

[0089] The cover frame 101 forms the outer shape of the arc extinguishing module 100 . Although not shown in the figure, the cover frame 101 may be formed integrally with or separately from a lower cover frame (not shown) forming the outer shape of the driving module 20 .

[0090] The cover frame 101 may be made of an insulating material, and its purpose is to prevent the current applied during the operation of the relay 1 from leaking to the outside.

[0091] In addition, the cover frame 101 may be made of a highly rigid material.

[0092] This is to prevent damage due to the external environment in which the relay 1 is installed and arc A generated inside the relay 1.

[0093] It is a matter of course that the cover frame 101 can be made of a synthetic resin material such as reinforced plastic.

[0094] The cover frame 101 may be of any form in which various components can be mounted.

[0095] In the figure, the cover frame 101 is shown to be distinguishable from the driving module 20 by the support plate 26. As mentioned above, it is natural that the cover frame 101 can be formed integrally with the lower cover frame (not shown) including the driving module 20.

[0096] The lower cover frame is made of the same material as the cover frame 101 described above and can perform the same function.

[0097] The arc chamber 102 has a box-shaped structure with an open bottom surface, and is provided on an upper side inside the cover frame 101 constituting the arc extinguishing module 100 .

[0098] The arc chamber 102 is made of a material having excellent insulation, pressure resistance, and heat resistance so as to extinguish the arc A generated between the movable contact 120 and the fixed contact 110 when the circuit is opened or closed.

[0099] In other words, since the arc chamber 102 is used to extinguish the arc generated by the separation of the fixed contact 110 and the movable contact 120 in its internal space (chamber space), the arc chamber 102 may also be called an “arc extinguishing portion”.

[0100] The fixed contact 110 , the movable contact 120 , the housing 140 , the contact pressure spring 130 , the arc guide pin 160 , and the arc shield G are accommodated and arranged in the interior space of the arc chamber 102 .

[0101] The movable contact 120 is accommodated in the internal space of the arc chamber 102 so as to be movable up and down by the shaft 21 of the driving module 20 coupled to the housing 140 .

[0102] While being housed in the internal space of the arc chamber 102 , the movable contact 120 can be raised and lowered in a direction toward the fixed contact 110 and in an opposite direction thereto.

[0103] In addition, the internal space of the arc chamber 102 may be filled with arc extinguishing gas.

[0104] The arc extinguishing gas can extinguish the generated arc A and discharge it to the outside of the DC relay 1 through a predetermined path.

[0105] To this end, a communication hole (not shown) may be formed through the wall surrounding the inner space of the arc chamber 102 .

[0106] As described above, the arc chamber 102 may be made of an insulating material with high voltage resistance and high heat resistance.

[0107] In one embodiment, the arc chamber 102 may be made of ceramic material.

[0108] In addition, the fixed contacts 110 constituting the relay 1 having the arc guiding and blocking structure according to the embodiment of the present invention are connected to an external power source or load in an energized manner, and a plurality of fixed contacts 110 may be provided as required.

[0109] For example, a pair of fixed contacts 110 is shown in the figure. The fixed contacts 110 may be fixedly disposed on the cover frame 101 and the arc chamber 102 .

[0110] A portion of the fixed contact 110 is exposed outside the cover frame 101 and can be electrically connected to an external power source or load.

[0111] Either one of the fixed contacts 110 formed as a pair may be connected to the power supply side, and the other may be connected to the load side.

[0112] Also, the movable contact 120 constituting the relay 1 having the arc guide and blocking structure according to the embodiment of the present invention has a length capable of contacting the plurality of fixed contacts 110 .

[0113] The movable contact 120 is provided at a lower portion of the fixed contact 110 so as to be linearly movable, and can be brought into contact with or separated from the fixed contact 120 .

[0114] The movable contact 120 is formed in a plate-like body with a predetermined length and is provided below the fixed contact 110 .

[0115] The movable contact 120 can linearly move in the vertical direction by the shaft 21 constituting the driving module 20 provided at the lower side of the relay 1 , so as to come into contact with or separate from the fixed contact 110 according to control of the relay 1 .

[0116] In other words, movable contact 120 comes into contact with fixed contact 110 in response to application of control power (when the relay is closed).

[0117] Therefore, the relay 1 according to the embodiment of the present invention can be energized with an external power source and load.

[0118] On the contrary, when the application of the control power is released, the movable contact 120 is separated from the fixed contact 110 (when the relay is turned off).

[0119] Therefore, the relay 1 according to the embodiment of the present invention can block energization with the external power source and the load.

[0120] Specifically, the movable contact 120 moves toward the fixed contact 110 to come into contact with the fixed contact 110 , or moves away from the fixed contact 110 to separate from the fixed contact 110 .

[0121] The movable contact 120 may be made of a conductive material.

[0122] Therefore, when the movable contact 120 contacts the fixed contact 110 , it can be connected to an external power source or load in an electrically conductive manner.

[0123] In addition, movable contact 120 is preferably provided adjacent to fixed contact 110 .

[0124] Furthermore, as described above, the movable contact 120 has a length capable of contacting the plurality of fixed contacts 110 , and the movable contact 120 is formed so that its length is greater than its width.

[0125] In the illustrated embodiment, the length direction is the left-right direction, and the width direction is the front-back direction.

[0126] In addition, preferably, the movable contact 120 is brought into contact with or separated from the plurality of fixed contacts 110 at the same time.

[0127] Therefore, movable contact 120 has a plate shape in which the longitudinal length is greater than the width length.

[0128] Furthermore, the movable contact 120 is formed to have a length greater than the length between two adjacent fixed contacts 110 .

[0129] In the figure, the movement of the movable contact 120 is constrained by a housing 140 to be described later, and the housing 140 can perform lifting (up and down) movement by coupling a shaft 21 to the lower portion thereof.

[0130] The housing 140 constituting the relay 1 having the arc guide and blocking structure according to the embodiment of the present invention accommodates the movable contact 120 within the installation space 146 .

[0131] Furthermore, the housing 140 has a structure that is raised and lowered by the shaft 21 of the driving module 20 coupled to the lower portion thereof.

[0132] As a specific example, refer to Figure 8 and Figure 9 The housing 140 includes a main body 141 in a box shape with an upper portion and two side portions opened.

[0133] An installation space 146 is formed inside the main body 141 of the housing 140 , and the shaft 21 of the driving module 20 is coupled to the lower portion of the installation space 146 .

[0134] Also, the housing 140 includes a support plate 142 that partially blocks the upper side of the opening of the body 141 and supports the upper portion of the movable contact 120 .

[0135] Therefore, the movable contact 120 is installed by being inserted into the installation space 146 of the housing 140 from the side, and its upper direction is blocked by the support plate 142, thereby preventing it from falling off.

[0136] Also, preferably, the bottom surface of support plate 142 is formed to have the same width as the width of movable contact 120 .

[0137] Therefore, the inner side wall of the main body 141 of the housing 140 with the support plate 142 formed on the upper portion contacts the width portion of the movable contact 120 in the installation space 146, which can prevent the movable contact 120 from shaking or detaching to the outside during the up and down lifting process.

[0138] In addition, refer to Figure 9 A locking flange 145 is further formed on one side of the lower side of the inner side wall of the main body 141 constituting the housing 140, where the installation space 146 is formed.

[0139] The snap-fit ​​flanges 145 are preferably formed on both sides of the inner side wall.

[0140] Therefore, when the movable contact 120 moves downward, it is caught on the above-mentioned engaging flange 145 and cannot move further downward.

[0141] This prevents the movable contact 120 from being excessively pressed downward due to excessive contact (pressing) with the fixed contact 110 , enabling the relay 1 to perform stable opening and closing operations.

[0142] In addition, the upper end of the shaft 21 of the driving module 20 coupled to the lower portion of the housing 140 supports the lower portion of the housing 140 , and the lower end is coupled to the movable iron core 23 to transmit the vertical movement of the movable iron core 23 to the housing 140 .

[0143] Furthermore, the housing 140 transmits the vertical movement of the shaft 21 to the movable contact 120 located in the installation space 146 .

[0144] Therefore, the movable contact 120 comes into contact with or separates from the fixed contact 110 while being supported by the housing 140 to perform up and down lifting motions.

[0145] When the relay 1 is closed, the movable contact 120 comes into contact with the fixed contact 110 .

[0146] At this time, in order to maintain the contact state between the movable contact 120 and the fixed contact 110 at a pressure greater than a certain level, a contact pressure spring 130 may be provided in the installation space 146 of the housing 140 .

[0147] The contact pressure spring 130 can maintain the contact state between the movable contact 120 and the fixed contact 110 at a pressure greater than or equal to a certain level.

[0148] In addition, when the movable contact 120 and the fixed contact 110 are separated and isolated due to the disconnection of the relay 1, the contact pressure spring 130 mitigates the impact force when the movable iron core 23 contacts the cylinder by reducing the moving speed of the movable iron core 23 and the shaft 21, thereby suppressing the generation of noise and vibration.

[0149] In addition, the relay 1 with the arc guiding and blocking structure according to the embodiment of the present invention is configured to accommodate a plurality of contact pressure springs 130 in the installation space 146 of the housing 140 to support the lower portion of the movable contact 120 and apply elastic force.

[0150] Preferably, the contact pressure springs 130 may have the same number as the number of the fixed contacts 110 according to the number of the fixed contacts 110 .

[0151] The contact pressure springs 130 are arranged at each pressure acting point of the fixed contact 110 on the movable contact 120 in order to mitigate the impact.

[0152] Furthermore, the movable contact 120 may be in the shape of a long plate, and the contact pressure springs 130 may be disposed on both sides of the movable contact 120 to mitigate impact.

[0153] As one embodiment of the relay 1 according to the present invention, in the figure, a pair of spaced-apart fixed contacts 110 is provided.

[0154] Furthermore, the number of the contact pressure springs 130 constituting the relay 1 having the arc guiding and blocking structure according to the embodiment of the present invention corresponds to the number of the fixed contacts 110 , that is, two contact pressure springs 130 .

[0155] This is to respectively support and cushion the portions pressed when the fixed contact 110 and the movable contact 120 come into contact with each other to minimize impact.

[0156] The contact pressure spring 130 may be composed of a first contact pressure spring 130 a provided on the left side of the movable contact 120 and a second contact pressure spring 130 b provided on the right side of the movable contact 120 .

[0157] In addition, a pair of fixed contacts 110 are provided at an upper portion of the cover frame 101 in a spaced-apart manner.

[0158] At this time, preferably, the central axis of each of the first contact pressure spring 130 a and the second contact pressure spring 130 b is disposed relatively close to the central axis of the fixed contact 110 .

[0159] In other words, it is preferable to minimize the distance between the central axis of the contact pressure spring 130 and the central axis of the fixed contact 110 .

[0160] The contact pressure spring 130 is arranged close to the position where the fixed contact 110 and the movable contact 120 contact and generate an impact in order to more effectively mitigate the impact.

[0161] In addition, the relay 1 with the arc guiding and blocking structure according to the embodiment of the present invention is configured so that the contact pressure spring 130 can be prevented from being separated or shaken during the operation of the relay.

[0162] To this end, a first protrusion 121 and a second protrusion 122 can be formed on the bottom surface of the movable contact 120, and the upper end of the first contact pressure spring 130a is sleeved on the first protrusion 121 and supported, and the upper end of the second contact pressure spring 130b is sleeved on the second protrusion 122 and supported.

[0163] Furthermore, a first insertion protrusion 143 and a second insertion protrusion 144 may be formed in the installation space 146 of the main body 141 of the housing 140, the lower end of the first contact pressure spring 130a is sleeved on the first insertion protrusion 143 and supported, and the lower end of the second contact pressure spring 130b is sleeved on the second insertion protrusion 144 and supported (refer to FIG. Figure 8 and Figure 9 ).

[0164] The plurality of contact pressure springs 130 can mitigate and withstand the impact generated when the fixed contact 110 and the movable contact 120 contact and collide.

[0165] Therefore, the plurality of contact pressure springs 130 ultimately suppress arc generation during operation of the relay 1 , thereby improving the electrical reliability of the relay 1 .

[0166] The first protrusion 121 , the second protrusion 122 , the first insertion protrusion 143 and the second insertion protrusion 144 may be shaped to be included in the spring wire of the contact pressure spring 130 , and may be in a form in which the cross section thereof gradually narrows in a direction of the length.

[0167] In addition, in the drawings, in order to stably support the contact pressure spring 130 , the first protrusion 121 , the second protrusion 122 , the first insertion protrusion 143 , and the second insertion protrusion 144 are shown as protruding shapes relative to the formed surface, but are not limited thereto.

[0168] In order to stably support the contact pressure spring 130 , it is a matter of course that the first protrusion 121 , the second protrusion 122 , the first insertion protrusion 143 , and the second insertion protrusion 144 may be formed in the shape of a hole or a groove.

[0169] Refer again Figure 4 As described above, the relay 1 with an arc guiding and blocking structure according to an embodiment of the present invention includes: an arc guiding pin 160, which is arranged on one side of the chamber space 102a to guide the direction of the generated arc A and extend the arc A; and an arc protection part G, which blocks the generated arc A from moving toward the contact pressure spring 130 in the form of surrounding the shell 140.

[0170] The arc guide pin 160 guides the generated arc A so that the arc A is extended to a length sufficient to be extinguished.

[0171] As an embodiment of this solution, the arc guide pin 160 is a magnetic body having a columnar shape with a predetermined length and diameter.

[0172] The arc guide pin 160 preferably has a length a ( Figure 6 ) and is arranged in the chamber space 102a with a length in the front-to-back direction.

[0173] Specifically, the arc guide pin 160 may include a column portion 161 having a set length and diameter, and heads 162 protruding from both ends of the column portion 161 to form snap-fit ​​flanges 163 .

[0174] In the figure, the arc guide pin 160 is shown in the form of a cylinder, but is not limited thereto. As long as it can guide the arc A, it can be a columnar shape with a cross-section of various shapes such as a circle, an ellipse, a polygon, etc.

[0175] However, it is preferable that the arc guide pin 160 is arranged on the lower side of the chamber space 102 a so as to have a length in the front-rear direction so as to be able to guide the generated arc A to extend to a sufficient length.

[0176] Furthermore, the arc guide pin 160 is supported by a protective wall portion 150 provided on an insulating plate 103 disposed on an upper portion of the support plate 26 .

[0177] The insulating plate 103 physically and electrically separates the chamber space 102 a from the lower driving module 20 .

[0178] The insulating plate 103 can electrically separate the components housed in the chamber space 102 a from the components housed in the driving module 20 , thereby preventing them from electrically affecting each other.

[0179] The insulating plate 103 may be stacked on the support plate 26 and may have a through hole formed therein so that the shaft 21 can move in the vertical direction.

[0180] In one embodiment, the insulating plate 103 is made of an insulating material, such as rubber or ceramic.

[0181] In addition, the protection wall portion 150 provided on the upper surface of the insulating plate 103 may perform a function of blocking the arc A from moving toward the contact pressure spring 130 or the shaft 21 .

[0182] To this end, the protection wall portion 150 has a protection wall 151 vertically formed on the upper surface of the insulation plate 103 in such a manner as to have a set height and width.

[0183] Furthermore, the protection wall portion 150 has a structure including a rib portion 152 that extends obliquely from one surface of the protection wall 151 in a direction away from the movable contact 120 .

[0184] At this time, it is a matter of course that a single rib 152 or a plurality of ribs 152 arranged separately may be provided as needed.

[0185] In addition, a seating groove 152a is formed on one side of the rib portion 152 so as to seat and support the arc guide pin 160 (see FIG. Figure 7 ).

[0186] As described above, since the arc guide pin 160 is seated and supported in the seating groove 152 a of the protection wall portion 150 , the arc guide pin 160 can be located in one side space within the chamber space 102 a .

[0187] In other words, the arc guide pin 160 has a distance d1 from the insulating plate 103 in the direction away from the upper surface of the insulating plate 103 through the protective wall 150, and can have a distance d2 from the longitudinal end of the movable contact 120 in the longitudinal direction (see Figure 5 ).

[0188] It goes without saying that the intervals d1 and d2 between the arc guide pins 160 described above can be set according to the size of the arc chamber 102 .

[0189] By disposing the arc guide pin 160 as described above, the arc A formed in the chamber space 102 a can be guided toward the arc guide pin 160 and extended to a sufficient length to be extinguished.

[0190] In addition, refer to Figure 11The height of the protection wall 151 of the protection wall portion 150 may be formed to extend from the upper surface of the insulating plate 103 to a position corresponding to the upper side of the movable contact 120 .

[0191] For example, the protection wall 151 may be formed to extend to the height of the upper end portion of the movable contact 120 .

[0192] Therefore, the generated arc A is blocked by the protective wall 151 to block its influence on the contact pressure spring 130 or the shaft 21 .

[0193] Preferably, protection wall 151 has a width (length) greater than the widthwise (front-rear) length of movable contact 120 .

[0194] As described above, the relay 1 having the arc guiding and blocking structure according to the embodiment of the present invention includes the arc shield G surrounding the housing 140 to block the generated arc A from moving toward the contact pressure spring 130 .

[0195] The arc shield G can be roughly divided into a first shield 170 and a second shield 180 .

[0196] First, the first protection portion 170 is made of a magnetic body.

[0197] The first guard portion 170 is disposed on the bottom surface of the movable contact 120 to guide the arc A extending through the arc guide pin 160 toward the first guard portion 170 .

[0198] The first protection portion 170 can block the generated arc A from moving toward the contact pressure spring 130 .

[0199] As an embodiment, the first protection portion 170 has the same size and shape as the bottom surface of the movable contact 120 .

[0200] Furthermore, first shield portion 170 is disposed so as to be in contact with the bottom surface of movable contact 120 .

[0201] In addition, first guard portion 170 may be in the form of a plate-shaped first plate 171 arranged to be in contact with the bottom surface of movable contact 120 .

[0202] Furthermore, the first protection portion 170 may be in the form of a second plate 172 further extending downward from both ends (left and right) of the first plate 171 in the longitudinal direction (refer to Figure 9 ).

[0203] The second plate 172 may have a size and shape capable of completely covering the openings on both sides of the main body 141 of the housing 140 , or may have a size and shape capable of partially covering the openings as needed.

[0204] In addition, in the relay 1 having the arc guiding and blocking structure according to the embodiment of the present invention, the arc guard G may be the second guard 180 covering both sides of the opening of the body 141 of the housing 140 .

[0205] In this case, the second protection portion 180 may be made of the same insulator as the insulating plate 103 .

[0206] The second protection portion 180 covers both sides of the main body 141 to block the generated arc A from moving toward the contact pressure spring 130 .

[0207] As an example, refer to Figure 8 and Figure 9 The second protection portion 180 has a structure including a first plate 181 having a size and shape capable of covering both sides of the opening of the body 141 and a second plate 182 extending from both sides of the first plate 181 toward the installation space 146.

[0208] At this time, protrusions 147 are formed on both sides of the outer end of the main body 141 , and protrusion grooves 182 a corresponding to the protrusions 147 may be formed on the second plate 182 .

[0209] As described above, when the protrusion 147 is coupled to the protrusion groove 182 a , the second prevention portion 180 may be detachably coupled to the housing 140 .

[0210] The forms and positions of the protrusion 147 and the protrusion groove 182a are not limited thereto, and they may be interchangeable with each other.

[0211] In addition, as long as the second protective part 180 is detachably coupled to the shell 140, a guide rail (not shown) is formed on the outer surface of the main body 141, and it is natural that the second protective part 180 can be coupled to the shell 140 in a manner that allows it to slide along the guide rail.

[0212] In addition, the first protection portion 170 and the second protection portion 180 constituting the arc protection portion G are described above as separate structures, but it is natural that the first protection portion 170 and the second protection portion 180 can be provided integrally.

[0213] The arc shield G integrally provided with the first shield 170 and the second shield 180 can completely block the movement of the generated arc A toward the contact pressure spring 130 .

[0214] As described above, the relay 1 with an arc guide blocking structure according to an embodiment of the present invention can effectively extinguish the arc A by setting the arc guide pin 160 in the chamber space 102a and guiding the generated arc A toward the arc guide pin 160 so that the generated arc A is extended to a sufficient length sufficient to be extinguished.

[0215] In addition, as the generated arc A is guided toward the arc guide pin 160 and extended, the arc A can be prevented from coming into contact with constituent elements such as the shaft 21 or the contact pressure spring 130 .

[0216] In addition, the arc protection part G of the housing 140 that sets the contact pressure spring 130 in the installation space 146 blocks the accidentally generated arc A from contacting components such as the shaft 21 or the contact pressure spring 130, thereby improving the mechanical life and electrical reliability of the product.

[0217] Furthermore, as the generated arc A is guided toward the arc guide pin 160 , the arc A does not remain continuously at the shortest distance between the fixed contact 110 and the movable contact 120 , thereby preventing welding between the fixed contact 110 and the movable contact 120 and damage to the product.

[0218] Although the embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention can easily propose other embodiments within the scope of the same spirit by adding, changing, deleting, appending, etc. to the constituent elements, but this will also be considered to fall within the scope of the present invention.

Claims

1. A relay with an arc guiding and blocking structure, characterized in that: include: Fixed contacts, connected to an external power source or load in a manner capable of conducting electricity; A movable contact, which contacts or separates from the fixed contact; a contact pressure spring supporting a lower portion of the movable contact and applying an elastic force to the movable contact; as well as The arc guide pin guides the direction of the generated arc and extends the arc.

2. The relay with arc guiding and blocking structure according to claim 1, characterized in that: The arc guide pin is a magnetic body and has a columnar shape with a preset length and diameter. The arc guide pin has a length longer than a widthwise length of the movable contact, The arc guide pin is configured to have a length in the front-rear direction.

3. The relay with arc guiding and blocking structure according to claim 2, characterized in that: The arc guide pin comprises: a column portion having a set length and diameter; and The head portion protrudes from both ends of the column portion to form a snap-fit ​​flange.

4. The relay with arc guiding and blocking structure according to claim 1, characterized in that: Also includes: a housing, accommodating the contact pressure spring in an installation space and lifting and lowering the contact pressure spring via a shaft coupled to a lower portion of the housing; as well as An arc chamber accommodates the fixed contact, the movable contact, and the housing in a chamber space.

5. The relay with arc guiding and blocking structure according to claim 4, characterized in that: The housing comprises: a main body having a box shape with an upper portion and two side openings, the installation space being formed inside the main body, and the shaft being coupled to the lower portion of the main body; and A support plate partially blocks an upper side of the opening of the main body and contacts and supports an upper surface of the movable contact.

6. The relay with arc guiding and blocking structure according to claim 4, characterized in that: The arc guide pin is arranged with a distance from the insulating plate in a direction away from an upper surface of the insulating plate, the insulating plate blocks a lower portion of the chamber space and the shaft penetrates the insulating plate, The arc guide pin is arranged with a distance therebetween from a longitudinal end portion of the movable contact in the longitudinal direction.

7. The relay with arc guiding and blocking structure according to claim 6, characterized in that: A protective wall portion is further included on an upper portion of the insulating plate, and the protective wall portion supports the arc guide pin.

8. The relay with arc guiding and blocking structure according to claim 7, characterized in that: The protective wall portion comprises: a protective wall vertically formed on an upper surface of the insulating plate to have a set height and width; and The rib-shaped portion extends obliquely from one surface of the protection wall in a direction away from the movable contact.

9. The relay with arc guiding and blocking structure according to claim 8, characterized in that: The protection wall is formed to extend to a height of an upper end portion of the movable contact.

10. The relay with arc guiding and blocking structure according to claim 8, characterized in that: A placement groove is formed on one side of the rib-shaped portion. The arc guide pin is seated in the seating groove.

Images