Relay having shock-absorbing structure for movable contact

Abstract

Disclosed is a relay having a shock-absorbing structure for a movable contact so that the relay can alleviate shock generated by contact between the movable contact and a fixed contact. The relay according to one aspect of the present invention comprises: the fixed contact; the movable contact; a housing; and a plurality of contact pressure springs.

Description

Relay with shock-absorbing structure of movable contacts

[0001] The present invention relates to a relay, and more particularly, to a relay having a shock-absorbing structure of a movable contact to alleviate shock caused by contact between a movable contact and a fixed contact when a DC relay is closed.

[0002] A direct current relay is a device that transmits mechanical drive or current signals using the principle of an electromagnet. It is also called a magnetic switch and is generally classified as an electrical circuit switching device.

[0003] A DC relay is a device used to open and close power, and has a wide range of applications, including industrial, household, and automotive use.

[0004] In particular, electric vehicles such as hybrid cars, fuel cell cars, golf carts, and electric forklifts are equipped with electric vehicle relays to supply and cut off power from the battery to the power generation device and electrical components, and these electric vehicle relays are one of the most important core components in electric vehicles.

[0005] Fig. 1 is a cross-sectional view illustrating a DC relay according to one embodiment of the prior art.

[0006] Referring to this, this DC relay (1) can be broadly divided into a small-capacity module (10) and a driving module (20).

[0007] The Soho module (10) is connected to an external device and supplies power.

[0008] The drive module (20) controls the opening and closing of the contacts using electrical signals to supply or cut off power to the small-capacity module (10) connected to an external device.

[0009] The drive module (20) has a core portion of a movable core (23) and a fixed core (25) inside, includes a shaft (21), and can be distinguished from the small-capacity module (10) by a support plate (26).

[0010] Meanwhile, in these relays (1), the small-capacity module (10) is generally energized by contact between the fixed contact (11) and the movable contact (12).

[0011] The fixed contact (11) is connected to an external device and supplies power, and the movable contact (12) is located at the bottom of the fixed contact (11) and makes contact with or separates from the fixed contact (11) to supply or cut off power to the external device.

[0012] These movable contacts (12) are coupled with the shaft (21) of the drive module (20) and perform contact and separation with the fixed contacts (11) through switching.

[0013] In other words, the current flow 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, movement of the movable contact (12) is achieved by the shaft (21) of the drive module (20).

[0015] Meanwhile, when the relay (1) is opened or closed by contact or separation (separation) of the fixed contact (11) and the movable contact (12), a pressure spring (13) is included that applies elastic force to the movable contact (12).

[0016] In other words, a pressure spring (13) is provided at the bottom of 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 pressure spring (13) is located between the movable contact (12) and the upper side of the shaft (21).

[0018] The pressure spring (13) serves to maintain the movable contact (12) in contact with the fixed contact (11) at a pressure greater than a certain level.

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

[0020] Meanwhile, when the fixed contact (11) and the movable contact (12) are separated, an arc occurs between the fixed contact (11) and the movable contact (12).

[0021] These arcs are flows of high-pressure, high-temperature current.

[0022] Therefore, the generated arc must be quickly discharged from the DC relay (1) through a preset path.

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

[0024] The magnet forms a magnetic field inside the space where the fixed contact (11) and the movable contact (12) come into contact.

[0025] An 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-closed space called an arc chamber (15).

[0027] Accordingly, an arc generated when the fixed contact (11) and the movable contact (12) come into contact and are separated is also formed inside the arc chamber.

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

[0029] Meanwhile, the arc generates a large amount of heat, and the generated heat is discharged to the outside of the arc chamber (15) through the arc chamber (15) and the magnet.

[0030] Meanwhile, as described above, one pressure spring (13) is provided on the upper part of the shaft (21).

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

[0032] In other words, when the DC relay (1) is closed, the movable contact (12) fixed to the shaft (21) comes into contact with the fixed contact (11), and the pressure spring (13) located at the bottom of the movable contact (12) alleviates the impact of the movable contact (12) when it comes into contact with the fixed contact (11) and maintains the contact pressure with the fixed contact (11).

[0033] And, when the open circuit of the DC relay (1) moves the movable contact (12) away from the fixed contact (11), the above-described arc is generated, and the generated arc is extinguished as its length increases.

[0034] However, referring to FIGS. 2 to 4, in the conventional DC relay (1), when the movable contact (12) fixed to the shaft (21) is in contact with the fixed contact (11), there is a problem in that the movable contact (12) is bounced off due to impact repulsion and cannot maintain contact with the fixed contact (11) (see FIG. 4).

[0035] Accordingly, in the conventional relay (1), when the movable contact (12) and the fixed contact (11) are in contact during the closing process, a small opening (a, Fig. 4) cannot be formed due to the repulsive force that causes the movable contact (12) to bounce off.

[0036] If such a weak opening (a, Fig. 4) is formed, an arc (A) is bound to occur at that moment.

[0037] And, heat is bound to be generated along with the arc (A).

[0038] Accordingly, there was a problem in which fusion occurred between the movable contact (12) and the fixed contact (11) as the local area of ​​the contact between the movable contact (12) and the fixed contact (11) melted.

[0039] Accordingly, there is an urgent need for improvement of the relay (1) that can improve electrical reliability by minimizing the impact of the movable contact (12) and the fixed contact (11) that occurs during closing in the DC relay (1).

[0040] The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to provide a relay having a shock-absorbing structure of a movable contact so as to alleviate the shock caused by contact between a movable contact and a fixed contact when a DC relay is closed.

[0041] In addition, the present invention provides a relay having a shock-absorbing structure of a movable contact so as to alleviate the shock when the movable contact and the fixed contact are closed without excessive structural changes.

[0042] In addition, the present invention provides a relay having a shock-absorbing structure of a movable contact that can prevent the movable contact from being bounced off by an impact repulsive force when the movable contact and the fixed contact come into contact by adding the number of pressure springs on the lower side of the movable contact.

[0043] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0044] According to one aspect of the present invention, a relay having a shock-absorbing structure of a movable contact is provided.

[0045] A relay having a shock-absorbing structure of a movable contact comprises: a plurality of fixed contacts that are electrically connected to an external power source or load; a movable contact that has a length that can contact the plurality of fixed contacts and is positioned so as to be linearly movable below the fixed contacts, and is in contact with or separated from the fixed contacts; a housing that accommodates the movable contacts in a mounting space and moves up and down by a shaft coupled to a lower portion; and a plurality of pressure springs accommodated in the mounting space of the housing to support the lower portion of the movable contacts and apply elastic force.

[0046] At this time, the pressure springs may be provided in the same number as the number of fixed contacts.

[0047] Preferably, the pressure spring may be formed by a first pressure spring provided on the left side of the movable contact and a second pressure spring provided on the right side of the movable contact.

[0048] Meanwhile, the fixed contacts are configured as a pair spaced apart with a gap, wherein each of the first pressure spring and the second pressure spring is provided to be close to the central axis of each other's fixed contacts.

[0049] Meanwhile, the fixed contact is arranged so that an imaginary extension line extending downward from the inner end of the fixed contact passes through an area formed by the diameter of the pressure spring.

[0050] Preferably, the fixed contact is arranged so that the inner end of the fixed contact and the central axis of the pressure spring are aligned.

[0051] Meanwhile, the movable contact has a first protrusion formed on the bottom surface into which the upper end of the first pressure spring is fitted, and a second protrusion formed on which the upper end of the second pressure spring is fitted.

[0052] And, the housing can form a first fitting portion into which the lower end of the first pressure spring is fitted in the mounting space, and a second fitting portion into which the lower end of the second pressure spring is fitted.

[0053] Meanwhile, in one embodiment, the housing includes a body having an open upper portion and two sides, which forms the mounting space inside, and a shaft coupled to the lower portion; and a holder plate that partially blocks the opened upper portion of the body and supports the upper surface of the movable contact point by contacting it.

[0054] Preferably, the width of the bottom surface of the holder plate is formed to have the same length as the width of the movable contact.

[0055] Meanwhile, the body may further include a catch on one side of the lower side of the inner side wall forming the mounting space to prevent the movable contact from moving downward.

[0056] Meanwhile, in one embodiment, the pressure spring is formed by a first pressure spring provided on the left side of the movable contact and a second pressure spring provided on the right side of the movable contact.

[0057] At this time, the holder plate of the housing can be formed between the central axis of the first pressure spring and the central axis of the second pressure spring.

[0058] In one embodiment, the movable contact is configured as a plate shape whose length direction is longer than its width direction.

[0059] At this time, the movable contact can be formed with a length longer than the distance between the center axes of the fixed contact and the adjacent fixed contact.

[0060] According to the above configuration, a relay having a shock-absorbing structure of a movable contact according to the present invention has an effect of alleviating shock resulting from contact between a movable contact and a fixed contact when a DC relay is closed.

[0061] Additionally, simply adding the number of pressure springs has the effect of alleviating the shock when closing the movable contact and the fixed contact without excessive structural changes.

[0062] In addition, by adding the number of pressure springs on the lower side of the movable contact, it is possible to prevent the movable contact from being bounced off by the impact repulsion force when the movable contact and the fixed contact come into contact, as well as to prevent the fusion of the movable contact and the fixed contact due to the arc, thereby increasing the switching performance of the relay.

[0063] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the composition of the invention described in the claims.

[0064] Figure 1 is a drawing showing a relay according to the prior art.

[0065] Figures 2 and 3 are schematic drawings showing the contact process between a movable contact and a fixed contact in a relay according to the prior art.

[0066] Figure 4 is a schematic diagram showing a phenomenon in which a movable contact bounces off a fixed contact when it comes into contact with a relay according to the prior art.

[0067] FIG. 5 is a drawing showing a relay having a shock-absorbing structure of a movable contact according to an embodiment of the present invention.

[0068] FIG. 6 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.

[0069] FIG. 7 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.

[0070] Fig. 8 is a drawing showing a cross-section after the movable contact and the housing and shaft are combined according to Fig. 7.

[0071] Fig. 9 is a partial cross-sectional perspective drawing showing a cross-section of the housing according to Fig. 7.

[0072] FIG. 10 and FIG. 11 are drawings showing a process in which a movable contact is raised and lowered to come into contact with a fixed contact in a relay having a shock-absorbing structure of a movable contact according to an embodiment of the present invention.

[0073] The present invention, in its best form, provides a relay having a shock-absorbing structure of a movable contact, comprising: a plurality of fixed contacts that are electrically connected to an external power source or load; a movable contact having a length that can contact the plurality of fixed contacts and is positioned so as to be linearly movable below the fixed contacts, so as to contact or be spaced apart from the fixed contacts; a housing that accommodates the movable contacts in a mounting space and moves up and down by a shaft coupled to a lower portion; and a plurality of pressure springs accommodated in the mounting space of the housing to support the lower portion of the movable contacts and apply elastic force.

[0074] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts irrelevant to the description are omitted in the drawings, and the same reference numerals designate identical or similar components throughout the specification.

[0075] The words and terms used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings, but should be interpreted in a way that is consistent with the technical idea of ​​the present invention, in accordance with the principles by which the inventor can define terms and concepts in order to best explain his or her invention.

[0076] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to a preferred embodiment of the present invention, and do not represent all of the technical ideas of the present invention, so there may be various equivalents and modified examples that can replace the configuration at the time of filing of the present invention.

[0077] In this specification, terms such as “include” or “have” are intended to describe the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0078] When a component is said to be "in front of," "behind," "above," or "below" another component, this includes not only being placed "in front of," "behind," "above," or "below" the other component in direct contact with it, but also if there is another component intervening therebetween. Furthermore, when a component is said to be "connected" to another component, this includes not only being directly connected to one another, but also being indirectly connected to one another, unless there are special circumstances.

[0079] Hereinafter, a relay having a shock-absorbing structure of a movable contact according to one embodiment of the present invention will be described with reference to the drawings.

[0080]

[0081] Referring to FIGS. 5 to 11, a relay (1) having a shock-absorbing structure of a movable contact according to an embodiment of the present invention is configured to alleviate shock resulting from contact between a movable contact (120) and a fixed contact (110) when the DC relay (1) is closed, thereby preventing the movable contact (120) from being bounced off the fixed contact (110).

[0082] Accordingly, when the electrical circuit of the relay (1) is opened and closed, fusion between the movable contact (120) and the fixed contact (110) is prevented due to the generation of an arc, thereby improving the opening and closing performance of the relay (1).

[0083] To this end, a relay (1) having a shock-absorbing structure of a movable contact according to an embodiment of the present invention has a structure including a small-capacity module (100) and a driving module (20).

[0084] And, the relay (1) having a shock-absorbing structure of a movable contact has a structure that largely includes a fixed contact (110), a movable contact (120), a housing (140), and a plurality of pressure springs (130).

[0085] The known structure and operation of the above-described Soho module (100) and drive module (20) are omitted to avoid obscuring the gist of the present invention.

[0086] However, the relay (1) according to the embodiment of the present invention can minimize the shock generated when a fixed contact (110) and a movable contact (120) come into contact by buffering the shock with a plurality of pressure springs (130).

[0087] In other words, when the movable contact (120) moves upward and comes into contact with the fixed contact (110), the plurality of pressure springs (130) support the movable contact (120) from below to alleviate the impact while maintaining the contact pressure with the fixed contact (110).

[0088] Accordingly, it is possible to prevent fusion between components due to arc and heat generated when the relay (1) is closed, and to improve the electrical reliability of the relay (1).

[0089]

[0090] As confirmed in Fig. 5, a relay (1) having a shock-absorbing structure of a movable contact according to an embodiment of the present invention includes a fixed contact (110), a movable contact (120), a housing (140), and a plurality of pressure springs (130) within an arc chamber (102) inside a cover frame (101).

[0091] The cover frame (101) forms the outer shape of the Soho module (100), and although not shown, the drive module (20) may be integral with or separate from the lower cover frame (not shown) forming the outer shape.

[0092] This cover frame (101) can be formed of an insulating material, and is intended to prevent current applied during operation of the relay (1) from randomly leaking to the outside.

[0093] Additionally, the cover frame (101) can be formed of a high-strength material.

[0094] This is to prevent damage caused by arcs generated in the external environment and internal environment where the relay (1) is installed.

[0095] Of course, this cover frame (101) can be formed of a synthetic resin material such as reinforced plastic.

[0096] This cover frame (101) may be of any shape capable of mounting various components therein.

[0097] In the city, the cover frame (101) is expressed so as to be distinguished from the driving module (20) by the support plate (26) and the insulation plate (103), but as described above, the cover frame (101) can be integral with the lower cover frame (not shown) including the driving module (20).

[0098] The lower cover frame can perform the same role as the cover frame (101) described above and is made of the same material.

[0099] The arc chamber (102) is formed in a box shape with an open bottom and is installed inside the cover frame (101) that constitutes the arc module (100).

[0100] The arc chamber (102) is made of a material with excellent insulation, pressure resistance, and heat resistance so as to be able to extinguish an arc generated at a movable contact (120) and a fixed contact (110) when an electrical circuit is opened or closed.

[0101] In other words, the arc chamber (102) extinguishes an arc generated by the separation of the fixed contact (110) and the movable contact (120) in the internal space (chamber space), and thus, the arc chamber (102) may also be referred to as an “arc extinguishing unit.”

[0102] The above-described fixed contact (110), movable contact (120), housing (140) and multiple pressure springs (130) are accommodated and arranged in the internal space of the arc chamber (102).

[0103] In the internal space of the arc chamber (102), a movable contact (120) is received so as to be able to move up and down by a shaft (21) of a drive module (20) coupled to a housing (140).

[0104] The movable contact (120) can be raised and lowered in the direction toward and in the opposite direction to the fixed contact (110) while being accommodated in the internal space of the arc chamber (102).

[0105] Meanwhile, the internal space of the arc chamber (102) can be filled with a gas for extinguishing.

[0106] The arc gas is used to extinguish the generated arc and to discharge it to the outside of the DC relay (1) through a preset path.

[0107] For this purpose, a ventilation hole (not numbered) may be formed through the wall surrounding the internal space of the arc chamber (102).

[0108] As described above, the arc chamber (102) can be formed of an insulating material having high pressure resistance and high heat resistance.

[0109] In one embodiment, the arc chamber (102) may be formed of a ceramic material.

[0110]

[0111] Meanwhile, the fixed contact (110) applied to the relay (1) having a shock-absorbing structure of a movable contact according to an embodiment of the present invention is energized and connected to an external power source or load, and may be configured in multiple units as needed.

[0112] For example, in the city, fixed contacts (110) are expressed as being provided in pairs, and these fixed contacts (110) are fixedly installed on the cover frame (101) and the arc chamber (102).

[0113] The fixed contact (110) is partially exposed to the outside of the cover frame (101) and can be electrically connected to an external power source or load.

[0114] One of the fixed contacts (110) formed as a pair may be connected to the power side and the other may be connected to the load side.

[0115]

[0116] And, the movable contact (120) constituting the relay (1) having a shock-absorbing structure of a movable contact according to an embodiment of the present invention has a length that can come into contact with a plurality of fixed contacts (110).

[0117] The movable contact (120) is positioned so as to be linearly movable below the fixed contact (110), and is brought into contact with or separated from the fixed contact (120) by the housing (140) and shaft (21) described later.

[0118] The moving contact (120) is formed as a plate body of a predetermined length and is installed below the fixed contact (110).

[0119] The movable contact (120) is made to be able to move up and down linearly by a shaft (21) that constitutes a driving module (20) configured on the lower side of the relay (1), and is brought into contact with or separated from the fixed contact (110) according to the control of the relay (1).

[0120] In other words, the movable contact (120) comes into contact with the fixed contact (110) when the control power is applied (when the relay is closed).

[0121] Accordingly, the relay (1) according to the embodiment of the present invention can be energized with an external power source and load.

[0122] Conversely, the movable contact (120) is separated from the fixed contact (110) when the control power supply is released (when the relay is opened).

[0123] Accordingly, the relay (1) according to the embodiment of the present invention is cut off from the external power source and load.

[0124] Specifically, the movable contact (120) moves in a direction toward the fixed contact (110) to come into contact with the fixed contact (110), or moves in a direction opposite to the fixed contact (110) to be separated from the fixed contact (110).

[0125] These movable contacts (120) can be formed of a conductive material.

[0126] Therefore, when the movable contact (120) comes into contact with the fixed contact (110), it can be electrically connected to an external power source or load.

[0127] Meanwhile, it is preferable that the movable contact (120) be located adjacent to the fixed contact (110).

[0128] Meanwhile, as described above, the movable contact (120) has a length that can come into contact with a plurality of fixed contacts (110), and the length of the movable contact (120) is formed to be longer than the width.

[0129] In the illustrated embodiment, the longitudinal direction is the left-right direction, and the width direction is the front-back direction.

[0130] Meanwhile, it is preferable that the movable contact (120) be in contact with or separated from a plurality of fixed contacts (110) at the same time.

[0131] Accordingly, the movable contact (120) has a plate shape in which the length direction is longer than the width direction.

[0132] And, the movable contact (120) is formed to have a length longer than the distance (C2-C2) between the center axes of the fixed contact (110) and the adjacent fixed contact (110) (see Fig. 11).

[0133]

[0134] Meanwhile, in the city, the movement of these movable contacts (120) is controlled by the housing (140) described later, and the shaft (21) can perform an up-and-down movement by the housing (140) coupled to the lower part.

[0135] A housing (140) constituting a relay (1) having a shock-absorbing structure of a movable contact according to an embodiment of the present invention accommodates a movable contact (120) within a mounting space (146).

[0136] And, the housing (140) has a structure that is raised and lowered by the shaft (21) of the driving module (20) coupled to the lower part.

[0137] As a specific example, referring to FIGS. 6 to 9, the housing (140) described above has a body (141) in the shape of a container with an upper portion and two sides open.

[0138] The housing (140) forms a mounting space (146) inside the body (141), and the shaft (21) of the drive module (20) is coupled to the lower part.

[0139] And, the housing (140) partially blocks the open upper side of the body (141) and includes a holder plate (142) that supports the upper part of the movable contact (120).

[0140] The movable contact (120) can be mounted in a manner of being inserted from the side into the mounting space (146) of the housing (140), and is prevented from being detached by blocking the upper direction by the holder plate (142) described above.

[0141] Meanwhile, in the city, the holder plate (142) is expressed as being integral to the body (141), but it can of course be a structure that can be separated and removed as needed.

[0142] And, it is preferable that the holder plate (142) be formed so that the width of its bottom surface has the same length as the width of the movable contact (120).

[0143] And, the body (141) of the housing (140) forming the holder plate (142) on the upper part is brought into contact with the width portion of the movable contact (120) and the inner side wall in the mounting space (146).

[0144] By the structure described above, the movable contact (120) is supported in the width direction by the side wall of the body (141) of the housing (140) and, in addition, the upper part is supported by the holder plate (142), so that it can be prevented from shaking or being dislodged externally while moving up and down for contact and separation of the fixed contact (110).

[0145] Meanwhile, referring to FIG. 9, the body (141) constituting the housing (140) further forms a catch (145) on one side of the lower side of the inner side wall forming the mounting space (146).

[0146] It would be desirable for the catch (145) to be formed on both sides of the inner side wall.

[0147] Accordingly, when the movable contact (120) is pushed downward while in contact with the fixed contact (110), it is caught by the above-described catch (145) and is prevented from moving downward any further.

[0148] By means of such a catch (145), the movable contact (120) can be prevented from being excessively pressed downward due to possible excessive contact (squeezing) with the fixed contact (110).

[0149] Accordingly, the relay (1) according to the embodiment of the present invention can perform a stable opening and closing operation.

[0150]

[0151] Meanwhile, the shaft (21) of the drive module (20) coupled to the lower part of the body (141) of the housing (140) supports the lower part of the housing (140) described above at its upper part, and a movable core (23) is coupled to the lower part to transmit the up-and-down movement of the movable core (23) to the housing (140).

[0152] And, the housing (140) transmits the up-and-down movement of the shaft (21) to the movable contact (120) located in the mounting space (146).

[0153] Accordingly, the movable contact (120) is supported by the housing (140) and moves up and down to come into contact with or be separated from the fixed contact (110).

[0154] Meanwhile, when the relay (1) is closed, the movable contact (120) comes into contact with the fixed contact (110).

[0155] At this time, in order to enable the movable contact (120) to maintain contact with the fixed contact (110) at a pressure greater than a certain level, a pressure spring (130) is provided in the mounting space (146) of the housing (140).

[0156] The pressure spring (130) enables the movable contact (120) to maintain contact with the fixed contact (110) at a pressure greater than a certain level.

[0157] In addition, the pressure spring (130) reduces the moving speed of the movable core (23) and the shaft (21) when the movable contact (120) of the relay (1) is separated from the fixed contact (110), thereby alleviating the impact force when the movable core (23) and the cylinder come into contact, thereby suppressing the occurrence of noise and vibration.

[0158]

[0159] Meanwhile, a relay (1) having a shock-absorbing structure of a movable contact according to an embodiment of the present invention is configured to accommodate a plurality of pressure springs (130) in a mounting space (146) of a housing (140) to support the lower portion of the movable contact (120) described above and apply elastic force.

[0160] Preferably, the pressure spring (130) may be provided in the same number as the number of fixed contacts (110).

[0161] This is to alleviate the impact by placing a pressure spring (130) at each pressure position applied by the fixed contact (110) to the movable contact (120).

[0162] Alternatively, the movable contact (120) may have a plate shape with a length, and the pressure spring (130) may be arranged on each side of the movable contact (120) to have a structure that alleviates shock.

[0163] As described above, the relay (1) having a shock-absorbing structure of a movable contact according to one embodiment of the present invention has the greatest feature of forming a plurality of pressure springs (130) that support the lower portion of the movable contact (120) as needed.

[0164] In one embodiment of the relay (1) according to the present invention, the fixed contacts (110) in the city are configured as a pair spaced apart at intervals.

[0165] And, the pressure spring (130) constituting the relay (1) having a shock-absorbing structure of a movable contact according to an embodiment of the present invention is composed of two pressure springs (130) corresponding to the number of fixed contacts (110) described above.

[0166] This is to minimize impact by supporting and cushioning the parts that are pressed when the fixed contact (110) comes into contact with the movable contact (120).

[0167] The pressure spring (130) can be composed of a first pressure spring (130a) provided on the left side of the movable contact (120) and a second pressure spring (130b) provided on the right side of the movable contact (120).

[0168] Meanwhile, the fixed contacts (110) are configured as a pair spaced apart from each other on the upper part of the cover frame (101).

[0169] At this time, it is preferable that each of the first pressure spring (130a) and the second pressure spring (130b) be provided so that its central axis (C1) is close to the central axis (C2) of a different fixed contact point (110) (see Fig. 11).

[0170] In other words, it would be desirable to minimize the gap (a) between the central axis (C1) of the pressure spring (130) and the central axis (C2) of the fixed contact (110).

[0171] This is to further alleviate the impact by placing the pressure spring (130) closer to the position where the fixed contact (110) and the movable contact (120) come into contact and impact occurs.

[0172] Meanwhile, referring to FIG. 11, the fixed contact (110) is arranged so that an imaginary extension line extending downward from the inner end of the fixed contact (110) passes through an area formed by a pressure spring (130) arranged at the lower portion of the movable contact (120).

[0173] In other words, when looking down from above at a relay (1) equipped with a shock-absorbing structure of a movable contact according to an embodiment of the present invention, the area occupied by the pressure spring (130) and the area occupied by the fixed contact (110) are arranged so that an area overlaps with each other.

[0174] In this way, by positioning the fixed contact (110) within the area of ​​the pressure spring (130), when the fixed contact (110) and the movable contact (120) come into contact and an impact occurs, the movable contact (120) is prevented from shaking due to the impact, and at the same time, the pressure spring (130) can absorb and alleviate the impact more.

[0175] If the fixed contact (110) is extremely tilted to the outside of the movable contact (120), there is a risk that the movable contact (120) may shake, and there is a risk that the movable contact (120) may bounce off due to the impact repulsion when the movable contact (120) and the fixed contact (110) come into contact.

[0176] In addition, if the virtual extension line extending downward from the end of the fixed contact (110) is too far off and approaches the central axis (C) of the shaft (21), the pressure spring (130) may not be able to absorb the shock.

[0177] Accordingly, it is preferable that the fixed contact (110) be arranged so that its inner end coincides with the central axis (C1) of the pressure spring (130).

[0178]

[0179] Meanwhile, a relay (1) equipped with a shock-absorbing structure of a movable contact according to an embodiment of the present invention is configured so that the above-described pressure spring (130) can be prevented from being detached or shaken during relay operation.

[0180] To this end, the movable contact (120) can form a first protrusion (121) on which the upper end of the first pressure spring (130a) is fitted and supported on the lower surface, and a second protrusion (122) on which the upper end of the second pressure spring (130b) is fitted and supported.

[0181] And, the housing (140) can form a first fitting portion (143) in which the lower end of the first pressure spring (130a) is fitted and supported in the mounting space (146) of the body (141), and a second fitting portion (144) in which the lower end of the second pressure spring (130b) is fitted and supported (see FIGS. 7 and 8).

[0182] These multiple pressure springs (130) absorb and withstand the impact that occurs when the fixed contact (110) and the movable contact (120) collide while making contact.

[0183] Accordingly, the plurality of pressure springs (130) can improve the electrical reliability of the relay (1) by suppressing the occurrence of arc during operation of the relay (1).

[0184] The first protrusion (121) and the second protrusion (122) and the first insertion protrusion (143) and the second insertion protrusion (144) of the above-described structure may have a shape that can be included in the spring steel wire of the pressure spring (130), and the cross-section thereof may become narrower as it gets farther away in the direction of length.

[0185] In addition, in order to stably support the pressure spring (130) in the city, the first protrusion (121), the second protrusion (122), and 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.

[0186] It goes without saying that the first protrusion (121) and the second protrusion (122), and the first fitting protrusion (143) and the second fitting protrusion (144) can be formed in the shape of a hole or groove to stably support the pressure spring (130).

[0187]

[0188] As described above, the relay (1) having a shock-absorbing structure of a movable contact according to an embodiment of the present invention includes a plurality of pressure springs (130) at the lower portion of the movable contact (120) so as to alleviate shock resulting from contact between the movable contact (120) and the fixed contact (110) when the DC relay (1) is closed.

[0189] In a preferred embodiment, a first pressure spring (130a) is provided on the left side and a second pressure spring (130b) is provided on the right side of a movable contact (120) having a preset length and width.

[0190] A plurality of pressure springs (130) formed in this manner are provided in the mounting space (146) of the body (141) of the housing (140) to which the shaft (21) is coupled at the bottom, and are placed on both sides of the holder plate (142) that supports and contacts the upper surface of the movable contact (120).

[0191] As shown in Fig. 10, as the shaft (21) is raised and lowered, the housing (140) moves upward, and the movable contact (120) moves toward the fixed contact (110).

[0192] And, as shown in Fig. 11, when a movable contact (120) and a fixed contact (110) come into contact, the phenomenon of the movable contact (120) being bounced off by the impact repulsion force is prevented by a plurality of pressure springs (130), thereby alleviating the impact during closing and improving the electrical reliability of the entire relay (1).

[0193]

[0194] Meanwhile, drawing reference numeral 160 refers to an arc guide pin, drawing reference numeral 170 refers to an upper arc guide, and drawing reference numeral 180 refers to a side arc guide.

[0195] The arc induction pin (160) guides the arc generated within the arc chamber (102) to pass through the arc induction pin (160) once, thereby maintaining the length of the generated arc long so that it can be extinguished.

[0196] In addition, the upper arc guide (170) is positioned on the upper side of the housing (140) so as to be in contact with the lower surface of the movable contact (120) and the lower side of the holder plate (142), and the side arc guide (180) is positioned so as to cover the open sides of the housing (140), thereby preventing the generated arc from moving to the pressure spring (130).

[0197] The upper arc guide (170) can further form a hole through which the first protrusion (121) and the second protrusion (122) of the movable contact (120) pass.

[0198] 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 will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit, but this will also be considered to fall within the spirit of the present invention.

Claims

1. A plurality of fixed contacts that can be electrically connected to an external power source or load; A movable contact having a length capable of contacting a plurality of the fixed contacts and positioned so as to be linearly movable below the fixed contacts, and contacting or moving away from the fixed contacts; A housing that accommodates the above-mentioned movable contact within a mounting space and moves up and down by a shaft coupled to the lower portion; Including a plurality of pressure springs accommodated in the mounting space of the housing to support the lower portion of the movable contact and apply elastic force; A relay having a shock-absorbing structure for the movable contacts.

2. In paragraph 1, The above pressure spring, A relay having a shock-absorbing structure of movable contacts, the number of which is the same as the number of fixed contacts.

3. In paragraph 1, The above pressure spring, A first pressure spring provided on the left side of the above movable contact, A relay having a shock-absorbing structure of a movable contact formed by a second pressure spring provided on the right side of the movable contact.

4. In paragraph 3, The above fixed contacts are composed of a pair spaced apart with a gap, A relay having a shock-absorbing structure of a movable contact, wherein each of the first pressure spring and the second pressure spring is provided so as to be close to the center axis of the different fixed contacts.

5. In paragraph 4, The above fixed contact is, A relay having a shock-absorbing structure of a movable contact, wherein a virtual extension line extending downward from the inner end of the fixed contact passes through an area formed by the diameter of the pressure spring.

6. In paragraph 4, The above fixed contact is, A relay having a shock-absorbing structure of a movable contact arranged so that the inner end of the fixed contact and the central axis of the pressure spring are aligned.

7. In paragraph 3, The above movable contact is, A first protrusion is formed on the bottom surface into which the upper end of the first pressure spring is fitted, and a second protrusion is formed into which the upper end of the second pressure spring is fitted, The above housing, A relay having a shock-absorbing structure of a movable contact, wherein a first fitting portion is formed into which the lower end of the first pressure spring is fitted in the above-mentioned mounting space, and a second fitting portion is formed into which the lower end of the second pressure spring is fitted.

8. In paragraph 1, The above housing, A body having an opening at the top and both sides to form the installation space inside, and a shaft coupled to the bottom, A relay having a shock-absorbing structure of a movable contact, the movable contact including a holder plate that partially blocks the open upper side of the body and supports the upper surface of the movable contact.

9. In paragraph 8, The width of the bottom of the above holder plate is A relay having a shock-absorbing structure of a movable contact formed to have a length equal to the width of the movable contact.

10. In paragraph 8, The above body, A relay having a shock-absorbing structure of a movable contact, wherein a catch is further provided on one side of the lower side of the inner side wall forming the above-mentioned mounting space.

11. In paragraph 8, The above pressure spring, It is formed by a first pressure spring provided on the left side of the above movable contact and a second pressure spring provided on the right side of the above movable contact, The holder plate of the above housing is, A relay having a shock-absorbing structure of a movable contact formed between the central axis of the first pressure spring and the central axis of the second pressure spring.

12. In paragraph 1, The above movable contact is, A relay having a shock-absorbing structure of a movable contact formed with a length longer than the distance between the center axes of the fixed contact and the adjacent fixed contact.

Images