Relay having impact damping structure of movable contact

Abstract

The invention discloses a relay with a shock buffering structure of a movable contact, which can buffer shock generated by contact of the movable contact and a fixed contact in the relay. A relay according to an aspect of the present invention includes a fixed contact, a movable contact, a housing, and a plurality of contact pressure springs.

Description

Technical Field

[0001] The present invention relates to a relay, and more particularly to a relay with an impact buffering structure of a movable contact, which can mitigate the impact generated by the contact between the movable contact and the fixed contact when the DC relay is closed. 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] The driving module 20 includes an iron core portion including a movable iron core 23 and a fixed iron core 25 , and includes a shaft 21 . The driving module 20 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, the relay 1 includes a contact pressure spring 13 that applies an elastic force to the movable contact 12 when the fixed contact 11 and the movable contact 12 come into contact with or separate (space apart) to open or close the relay 1 .

[0016] In other words, one contact pressure spring 13 is provided below the movable contact 12 to apply elastic force to the movable contact 12 when the movable contact 12 comes into contact with 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 can maintain the contact state between the movable contact 12 and the fixed contact 11 at a pressure greater than or equal to a certain level.

[0019] In addition, when the movable contact 12 is separated from the fixed contact 11, the contact pressure spring 13 reduces the moving speed of the movable iron core 23 and the shaft 21 to mitigate the impact force when the movable iron core 23 contacts the cylinder (not shown), thereby suppressing the generation of noise and vibration.

[0020] Furthermore, when the fixed contact 11 and the movable contact 12 are separated, an arc is generated between the fixed contact 11 and the movable contact 12 .

[0021] This arc is the flow of high-voltage, high-temperature electric current.

[0022] Therefore, it is necessary to quickly discharge the generated arc from the DC relay 1 through a preset path.

[0023] The arc discharge path is formed by the magnet provided in the DC relay 1 .

[0024] The magnet generates a magnetic field inside a space where fixed contact 11 and movable contact 12 are in contact with each other.

[0025] The arc discharge path can be formed by the electromagnetic force generated by the formed magnetic field and the flow of current.

[0026] The fixed contact 11 and the movable contact 12 are provided in a semi-enclosed space called an arc chamber 15 .

[0027] Therefore, an arc generated by the contact and separation between the fixed contact 11 and the movable contact 12 is also formed inside the arc chamber.

[0028] The generated arc extends in the space inside the arc chamber and is extinguished.

[0029] 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.

[0030] In addition, as described above, a contact pressure spring 13 is provided on the upper portion of the shaft 21 .

[0031] Also, when the movable contact 12 comes into contact with the fixed contact 11 , the contact pressure spring 13 applies an elastic force to the movable contact 12 .

[0032] In other words, when the DC relay 1 is closed, the movable contact 12 fixed to the shaft 21 contacts the fixed contact 11, and the contact pressure spring 13 located below the movable contact 12 mitigates the impact of the movable contact 12 when contacting the fixed contact 11 and maintains the contact pressure with the fixed contact 11.

[0033] Furthermore, when the DC relay 1 is disconnected, the arc is generated as the movable contact 12 moves away from the fixed contact 11 , and the length of the generated arc becomes longer and is extinguished.

[0034] However, referring to Figures 2 to 4 In the conventional DC relay 1, when the movable contact 12 fixed to the shaft 21 contacts the fixed contact 11, the movable contact 12 cannot maintain contact with the fixed contact 11 due to the impact repulsion force, and thus there is a problem of being bounced off (refer to Figure 4 ).

[0035] Therefore, in the conventional relay 1, when the movable contact 12 contacts the fixed contact 11 at the moment of closing, a tiny opening a ( Figure 4 ).

[0036] If such a tiny opening a( Figure 4 ), arc A will inevitably be generated at the moment the opening is formed.

[0037] Furthermore, the generation of the arc A is inevitably accompanied by heat generation.

[0038] Therefore, there is a problem that a part of the contact point between the movable contact 12 and the fixed contact 11 is melted, causing welding between the movable contact 12 and the fixed contact 11 .

[0039] Therefore, with respect to the DC relay 1 , there is a need to improve the relay 1 by minimizing the impact between the movable contact 12 and the fixed contact 11 during closing to improve electrical reliability. Summary of the Invention

[0040] Problems to be solved by the invention

[0041] The present invention is used to solve the above problems and aims to provide a relay with an impact buffering structure of a movable contact, which can mitigate the impact caused by the contact between the movable contact and the fixed contact when the DC relay is closed.

[0042] In addition, the present invention provides a relay with an impact buffering structure for a movable contact, which can mitigate the impact of the movable contact and the fixed contact when they are closed without making too many changes to the structure.

[0043] In addition, the present invention provides a relay with an impact buffering structure of a movable contact, which can prevent the movable contact from being bounced off due to the impact repulsive force when the movable contact contacts the fixed contact by increasing the number of contact pressure springs on the lower side of the movable contact.

[0044] 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.

[0045] Means used to solve problems

[0046] According to one aspect of the present invention, a relay having a shock-absorbing structure of a movable contact is provided.

[0047] A relay with an impact-buffering structure having movable contacts includes: a plurality of fixed contacts connected to an external power source or load in an energized manner; a movable contact having a length capable of contacting the plurality of fixed contacts, disposed below the fixed contacts in a manner capable of linear motion and contacting or separating with the fixed contacts; a housing that accommodates the movable contact within an installation space and enables lifting and lowering motion via a shaft coupled to the lower portion of the housing; and a plurality of contact pressure springs accommodated within the installation space of the housing to support the lower portion of the movable contact and apply elastic force.

[0048] At this time, the contact pressure springs may be provided in the same number as the number of the fixed contacts.

[0049] Preferably, the contact pressure spring may be composed of a first contact pressure spring and a second contact pressure spring, wherein the first contact pressure spring is arranged on the left side of the movable contact, and the second contact pressure spring is arranged on the right side of the movable contact.

[0050] In addition, the fixed contacts may be provided as a spaced-apart pair, and in this case, each of the first contact pressure spring and the second contact pressure spring may be provided in a manner close to the central axis of the fixed contacts different from each other.

[0051] In addition, the fixed contact may be arranged so that a virtual extension line extending downward from an inner distal end of the fixed contact passes through a region formed by a diameter of the contact pressure spring.

[0052] Preferably, the fixed contact is configured such that an inner end of the fixed contact is aligned with a central axis of the contact pressure spring.

[0053] Furthermore, a first protrusion into which the upper end portion of the first contact pressure spring is inserted and a second protrusion into which the upper end portion of the second contact pressure spring is inserted are formed on the bottom surface of the movable contact.

[0054] Also, a first insertion protrusion into which a lower end portion of the first contact pressure spring is inserted and a second insertion protrusion into which a lower end portion of the second contact pressure spring is inserted may be formed in the installation space of the housing.

[0055] In addition, as one embodiment, the shell includes: a main body, which has a box shape with openings on the top and both sides, the installation space is formed inside the main body, and the lower part of the main body is combined with the shaft; and a support plate, which partially blocks the upper side of the opening of the main body and contacts and supports the upper surface of the movable contact.

[0056] Preferably, the bottom surface of the support plate is formed to have the same width as the width of the movable contact.

[0057] In addition, a clamping flange is provided on one side of a lower portion of an inner side wall of the main body forming the installation space, and the clamping flange clamps the movable contact in a manner that the movable contact cannot move downward.

[0058] In addition, as an embodiment, the contact pressure spring is composed of a first contact pressure spring and a second contact pressure spring, the first contact pressure spring is arranged on the left side of the movable contact, and the second contact pressure spring is arranged on the right side of the movable contact.

[0059] At this time, the support plate of the housing is located between the central axis of the first contact pressure spring and the central axis of the second contact pressure spring.

[0060] As an embodiment, the movable contact is configured in a plate shape with a length in the longitudinal direction being greater than a length in the width direction.

[0061] In this case, the movable contact may be formed to have a length longer than a distance between center axes of two adjacent fixed contacts.

[0062] Effects of the Invention

[0063] With the above configuration, the relay having the impact buffering structure of the movable contact according to the present invention has the effect of buffering the impact caused by the contact between the movable contact and the fixed contact when the DC relay is closed.

[0064] In addition, there is an effect that the impact of the movable contact and the fixed contact when closing can be alleviated by simply increasing the number of contact pressure springs without requiring excessive structural changes.

[0065] In addition, the following effects are achieved: by increasing the number of contact pressure springs on the lower side of the movable contact, not only can the movable contact be prevented from being bounced open due to the impact repulsive force when the movable contact contacts the fixed contact, but also the movable contact and the fixed contact can be prevented from being welded due to the arc and the switching performance of the relay can be increased.

[0066] 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

[0067] Figure 1 is a diagram showing a relay according to the prior art.

[0068] Figures 2 to 3 FIG. 1 is a schematic diagram illustrating a contact process between a movable contact and a fixed contact in a relay according to the prior art.

[0069] Figure 4 is a schematic diagram illustrating a phenomenon in which a movable contact is bounced while in contact with a fixed contact in a relay according to the related art.

[0070] Figure 5 1 is a diagram illustrating a relay having a shock absorbing structure of a movable contact according to an embodiment of the present invention.

[0071] Figure 6 FIG. 1 is a perspective view showing a portion excluding an arc chamber in a relay having a shock absorbing structure of a movable contact according to an embodiment of the present invention.

[0072] Figure 7 1 is an exploded perspective view showing a movable contact, a housing, and a shaft in a relay having a shock absorbing structure of a movable contact according to an embodiment of the present invention.

[0073] Figure 8 It shows that according to Figure 7 A cross-sectional view of the movable contact, housing, and shaft after they are combined.

[0074] Figure 9 It shows that according to Figure 7 A partially sectional perspective view of a cross section of a housing.

[0075] Figure 10 and Figure 11 1 is a diagram illustrating a process in which a movable contact rises and falls to contact a fixed contact in a relay having a shock-absorbing structure of a movable contact according to an embodiment of the present invention. DETAILED DESCRIPTION

[0076] The best embodiment of the present invention provides a relay with an impact buffering structure having a movable contact, which includes: a plurality of fixed contacts, connected to an external power source or load in a manner that allows power to be supplied; a movable contact, having a length capable of contacting the plurality of fixed contacts, arranged at the lower part of the fixed contacts in a manner capable of linear motion and contacting or separating with the fixed contacts; a housing, which accommodates the movable contact in an installation space and performs lifting and lowering motion via an axis coupled to the lower part of the housing; and a plurality of contact pressure springs, accommodated in the installation space of the housing to support the lower part of the movable contact and apply elastic force.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] Hereinafter, a relay having a shock-absorbing structure of a movable contact according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0083] Reference Figures 5 to 11 The relay 1 with the impact buffering structure of the movable contact according to the embodiment of the present invention can mitigate the impact generated by the contact between the movable contact 120 and the fixed contact 110 when the DC relay 1 is closed, thereby preventing the movable contact 120 from being bounced relative to the fixed contact 110.

[0084] Therefore, the movable contact 120 and the fixed contact 110 can be prevented from being welded to each other due to an arc generated when the circuit of the relay 1 is opened or closed, so that the opening and closing performance of the relay 1 can be improved.

[0085] To this end, the relay 1 having the impact buffering structure of the movable contact according to the embodiment of the present invention has a structure including an arc extinguishing module 100 and a driving module 20 .

[0086] Also, the relay 1 having the impact buffering structure with the movable contact has a structure roughly including a fixed contact 110 , a movable contact 120 , a housing 140 , and a plurality of contact pressure springs 130 .

[0087] The known structures and actions of the arc extinguishing module 100 and the driving module 20 will be omitted so as not to obscure the main purpose of the present invention.

[0088] However, the relay 1 according to the embodiment of the present invention utilizes the plurality of contact pressure springs 130 to buffer the impact generated when the fixed contact 110 and the movable contact 120 come into contact, thereby minimizing the impact.

[0089] In other words, when the movable contact 120 moves upward and contacts the fixed contact 110 , the plurality of contact pressure springs 130 support the movable contact 120 from below to mitigate the impact and maintain the contact pressure with the fixed contact 110 .

[0090] Therefore, it is possible to prevent welding between components due to arcing and heat generated when the relay 1 is closed, and to improve the electrical reliability of the relay 1 .

[0091] like Figure 5 As shown, in the relay 1 with an impact buffering structure of a movable contact according to an embodiment of the present invention, inside the cover frame 101, the fixed contact 110, the movable contact 120, the housing 140 and a plurality of contact pressure springs 130 are arranged in the arc chamber 102.

[0092] 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 .

[0093] 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.

[0094] In addition, the cover frame 101 may be made of a highly rigid material.

[0095] This is to prevent damage from the external environment where the relay 1 is installed and arcing generated inside the relay 1.

[0096] It is a matter of course that the cover frame 101 can be made of a synthetic resin material such as reinforced plastic.

[0097] The cover frame 101 may be of any form in which various components can be mounted.

[0098] In the figure, the cover frame 101 is shown in a manner that can be distinguished from the driving module 20 by the support plate 26 and the insulating plate 103. 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.

[0099] The lower cover frame is made of the same material as the cover frame 101 described above and can perform the same function.

[0100] The arc chamber 102 has a box-shaped structure with an open bottom surface, and is provided inside the cover frame 101 constituting the arc extinguishing module 100 .

[0101] The arc chamber 102 is made of a material having excellent insulation, pressure resistance, and heat resistance so as to extinguish an arc generated between the movable contact 120 and the fixed contact 110 when the circuit is opened or closed.

[0102] 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 can also be called an "arc extinguishing part".

[0103] The fixed contact 110 , the movable contact 120 , the housing 140 , and the plurality of contact pressure springs 130 are accommodated and disposed in the interior space of the arc chamber 102 .

[0104] 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 .

[0105] 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.

[0106] In addition, the internal space of the arc chamber 102 may be filled with arc extinguishing gas.

[0107] The arc extinguishing gas can extinguish the generated arc and discharge it to the outside of the DC relay 1 through a predetermined path.

[0108] To this end, a communication hole (not denoted by a reference numeral) may be formed through the wall surrounding the inner space of the arc chamber 102 .

[0109] As described above, the arc chamber 102 may be made of an insulating material with high voltage resistance and high heat resistance.

[0110] In one embodiment, the arc chamber 102 may be made of ceramic material.

[0111] In addition, the fixed contacts 110 of the relay 1 having the impact buffering structure with the movable contact according to the embodiment of the present invention are connected to an external power source or load in an electrically conductive manner, and a plurality of fixed contacts 110 may be provided as required.

[0112] 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 .

[0113] 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.

[0114] 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.

[0115] Also, the movable contact 120 constituting the relay 1 having the impact buffering structure with the movable contact according to the embodiment of the present invention has a length capable of contacting the plurality of fixed contacts 110 .

[0116] The movable contact 120 is provided at the 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 by a housing 140 and a shaft 21 to be described later.

[0117] The movable contact 120 is formed in a plate-like body with a predetermined length and is provided below the fixed contact 110 .

[0118] 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 .

[0119] 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).

[0120] Therefore, the relay 1 according to the embodiment of the present invention can be energized with an external power source and load.

[0121] 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).

[0122] Therefore, the relay 1 according to the embodiment of the present invention can block energization with the external power source and the load.

[0123] 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 .

[0124] The movable contact 120 may be made of a conductive material.

[0125] 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.

[0126] In addition, movable contact 120 is preferably provided adjacent to fixed contact 110 .

[0127] 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.

[0128] In the illustrated embodiment, the length direction is the left-right direction, and the width direction is the front-back direction.

[0129] 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.

[0130] Therefore, movable contact 120 has a plate shape in which the longitudinal length is greater than the width length.

[0131] Furthermore, the movable contact 120 is formed to have a length greater than the distance C2-C2 between the center axes of two adjacent fixed contacts 110 (see Figure 11 ).

[0132] 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.

[0133] The housing 140 constituting the relay 1 having the impact buffering structure of the movable contact according to the embodiment of the present invention accommodates the movable contact 120 in the mounting space 146 .

[0134] 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.

[0135] As a specific example, refer to Figures 6 to 9 The housing 140 includes a main body 141 in a box shape with an upper portion and two side portions opened.

[0136] 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 .

[0137] 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 .

[0138] 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.

[0139] In addition, although the supporting plate 142 and the main body 141 are shown as being integrally formed in the figure, it is natural that they can be separately assembled and detached as needed.

[0140] Also, preferably, the bottom surface of support plate 142 is formed to have the same width as the width of movable contact 120 .

[0141] Also, an inner sidewall of the body 141 of the housing 140 , on which the support plate 142 is formed, may be in contact with a width portion of the movable contact 120 in the mounting space 146 .

[0142] According to the above structure, since the movable contact 120 is supported by the side walls of the main body 141 of the shell 140 in the width direction and the upper part is supported by the support plate 142, it can be prevented from shaking or detaching to the outside during the process of moving up and down to contact and separate with the fixed contact 110.

[0143] 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.

[0144] The snap-fit ​​flanges 145 are preferably formed on both sides of the inner side wall.

[0145] Therefore, when the movable contact 120 contacts the fixed contact 110 and is pushed downward, it is caught on the above-mentioned engaging flange 145 and cannot move further downward.

[0146] By the engaging flange 145 as described above, it is possible to prevent the movable contact 120 from being excessively pressed downward due to accidental excessive contact (pressing) with the fixed contact 110 .

[0147] Therefore, the relay 1 according to the embodiment of the present invention can perform stable opening and closing operations.

[0148] In addition, the upper end of the shaft 21 of the driving module 20 coupled to the lower portion of the main body 141 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 up and down movement of the movable iron core 23 to the housing 140 .

[0149] Furthermore, the housing 140 transmits the vertical movement of the shaft 21 to the movable contact 120 located in the installation space 146 .

[0150] 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.

[0151] When the relay 1 is closed, the movable contact 120 comes into contact with the fixed contact 110 .

[0152] 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 .

[0153] 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.

[0154] In addition, when the movable contact 120 of the relay 1 is separated and spaced apart from the fixed contact 110, 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.

[0155] In addition, the relay 1 with the impact buffering structure of the movable contact 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.

[0156] 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 .

[0157] 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.

[0158] 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.

[0159] As described above, the most significant feature of the relay 1 having the impact buffering structure of the movable contact according to an embodiment of the present invention is that a plurality of contact pressure springs 130 supporting the lower portion of the movable contact 120 are provided as required.

[0160] 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.

[0161] Furthermore, the number of the contact pressure springs 130 constituting the relay 1 with the impact buffering structure having the movable contact according to the embodiment of the present invention corresponds to the number of the fixed contacts 110 , that is, two contact pressure springs 130 .

[0162] 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.

[0163] 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 .

[0164] In addition, a pair of fixed contacts 110 are provided at an upper portion of the cover frame 101 in a spaced-apart manner.

[0165] At this time, preferably, the central axis C1 of each of the first contact pressure spring 130a and the second contact pressure spring 130b is set close to the central axis C2 of the fixed contact 110 different from each other (refer to Figure 11 ).

[0166] In other words, it is preferable to minimize the distance a between the central axis C1 of the contact pressure spring 130 and the central axis C2 of the fixed contact 110 .

[0167] 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.

[0168] In addition, refer to Figure 11 The fixed contact 110 is arranged so that a virtual extension line extending downward from the inner end of the fixed contact 110 passes through an area formed by the contact pressure spring 130 arranged below the movable contact 120 .

[0169] In other words, when the relay 1 with the impact buffering structure of the movable contact according to the embodiment of the present invention is viewed from above, it is configured in such a way that the area occupied by the contact pressure spring 130 and the area occupied by the fixed contact 110 overlap with each other.

[0170] As described above, the fixed contact 110 is located within the area of ​​the contact pressure spring 130 to prevent the movable contact 120 from shaking due to the impact when the fixed contact 110 contacts the movable contact 120 and generates an impact. At the same time, the contact pressure spring 130 can further absorb and mitigate the impact.

[0171] If the fixed contact 110 is excessively biased toward the outside of the movable contact 120 , the movable contact 120 may wobble, and there is also a concern that the movable contact 120 may be repelled by the impact repulsive force when the movable contact 120 contacts the fixed contact 110 .

[0172] Furthermore, if the virtual extension line extending downward from the distal end of the fixed contact 110 is excessively offset and approaches the central axis C of the shaft 21 , the contact pressure spring 130 may be unable to absorb the shock.

[0173] Therefore, preferably, the inner tip of the fixed contact 110 is configured to be aligned with the central axis C1 of the contact pressure spring 130 .

[0174] In addition, the relay 1 with the impact buffering structure of the movable contact according to the embodiment of the present invention is configured so that the contact pressure spring 130 can be prevented from being disengaged or shaken during the operation of the relay.

[0175] 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.

[0176] 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 7 and Figure 8 ).

[0177] 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.

[0178] 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 .

[0179] 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 have a cross section that gradually narrows in a direction of its length.

[0180] 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.

[0181] 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.

[0182] As described above, in the relay 1 having an impact buffering structure with a movable contact according to an embodiment of the present invention, a plurality of contact pressure springs 130 are included at the lower portion of the movable contact 120 so as to mitigate the impact generated by the contact between the movable contact 120 and the fixed contact 110 when the DC relay 1 is closed.

[0183] As a preferred embodiment, a first contact pressure spring 130 a is provided on the left side and a second contact pressure spring 130 b is provided on the right side of the lower portion of the movable contact 120 having a predetermined length and width.

[0184] The plurality of contact pressure springs 130 formed in this manner are installed in the installation space 146 of the main body 141 of the housing 140 whose lower portion is coupled to the shaft 21 , and are arranged on both sides of the support plate 142 that contacts and supports the upper surface of the movable contact 120 .

[0185] like Figure 10 As shown, as the shaft 21 rises and falls, the housing 140 moves upward, and at the same time, the movable contact 120 moves toward the fixed contact 110 side.

[0186] And, as Figure 11 As shown in , the multiple contact pressure springs 130 prevent the movable contact 120 from being bounced open due to the impact repulsion when the movable contact 120 contacts the fixed contact 110. When closing, the impact can be alleviated, thereby improving the overall electrical reliability of the relay 1.

[0187] In addition, reference numeral 160 denotes an arc guide pin, reference numeral 170 denotes an upper arc guide, and reference numeral 180 denotes a side arc guide.

[0188] The arc guide pin 160 can guide the arc generated in the arc chamber 102 to pass through the arc guide pin 160 once, thereby maintaining the length of the generated arc in a longer state to achieve arc extinguishing.

[0189] In addition, the upper arc guide 170 is arranged at the upper part of the shell 140 toward the lower part of the support plate 142 in a manner that contacts the bottom surface of the movable contact 120, and the side arc guide 180 is arranged in a manner that can cover both sides of the opening of the shell 140, thereby preventing the generated arc from moving toward the contact pressure spring 130.

[0190] The upper arc guide 170 may further include a hole through which the first protrusion 121 and the second protrusion 122 of the movable contact 120 pass.

[0191] 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 having an impact buffering structure with a movable contact, characterized in that: include: A plurality of fixed contacts connected to an external power source or load in an energized manner; a movable contact having a length capable of contacting the plurality of fixed contacts, disposed below the fixed contacts in a manner capable of linear movement and contacting or separating with the fixed contacts; a housing, accommodating the movable contact in an installation space and performing a lifting movement via a shaft coupled to a lower portion of the housing; as well as A plurality of contact pressure springs are accommodated in the installation space of the housing to support the lower portion of the movable contact and apply elastic force.

2. The relay with a shock-absorbing structure for movable contacts according to claim 1, wherein: The contact pressure springs are provided in the same number as the fixed contacts.

3. The relay with a shock-absorbing structure for movable contacts according to claim 1, wherein: The contact pressure spring is composed of a first contact pressure spring and a second contact pressure spring. The first contact pressure spring is disposed on the left side of the movable contact, and the second contact pressure spring is disposed on the right side of the movable contact.

4. The relay with a shock-absorbing structure for movable contacts according to claim 3, wherein: The fixed contacts are provided as a pair spaced apart from each other, Each of the first contact pressure spring and the second contact pressure spring is disposed close to the central axis of the fixed contacts that are different from each other.

5. The relay with a shock-absorbing structure for movable contacts according to claim 4, wherein: The fixed contact is arranged so that a virtual extension line extending downward from an inner distal end of the fixed contact passes through a region formed by a diameter of the contact pressure spring.

6. The relay with a shock-absorbing structure for movable contacts according to claim 4, wherein: The fixed contact is arranged so that an inner distal end of the fixed contact is aligned with a central axis of the contact pressure spring.

7. The relay with a shock-absorbing structure for movable contacts according to claim 3, wherein: A first convex portion into which the upper end portion of the first contact pressure spring is inserted and a second convex portion into which the upper end portion of the second contact pressure spring is inserted are formed on the bottom surface of the movable contact. A first insertion protrusion into which a lower end portion of the first contact pressure spring is inserted and a second insertion protrusion into which a lower end portion of the second contact pressure spring is inserted are formed in the installation space of the housing.

8. The relay with a shock-absorbing structure for movable contacts according to claim 1, wherein: 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.

9. The relay with a shock-absorbing structure for movable contacts according to claim 8, wherein: The bottom surface of the support plate is formed to have the same width as the width of the movable contact.

10. The relay with a shock-absorbing structure for movable contacts according to claim 8, wherein: A snap-fit ​​flange is further provided on one side of a lower portion of an inner side wall of the main body forming the installation space.

11. The relay with a shock-absorbing structure for movable contacts according to claim 8, wherein: The contact pressure spring is composed of a first contact pressure spring and a second contact pressure spring, wherein the first contact pressure spring is arranged on the left side of the movable contact, and the second contact pressure spring is arranged on the right side of the movable contact. The support plate of the housing is located between the central axis of the first contact pressure spring and the central axis of the second contact pressure spring.

12. The relay with a shock-absorbing structure for movable contacts according to claim 1, wherein: The movable contact is formed to have a length longer than a distance between center axes of two adjacent fixed contacts.

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