KR102098749B1 - circuit breaker having elastic hook type joint device - Google Patents

Abstract

The present invention relates to a circuit breaker having an elastic latching type coupling device, capable of significantly improving user convenience by allowing a user to conveniently attach and detach a DIN rail to and from a circuit breaker. According to the present invention, the circuit breaker having an elastic latching type coupling device comprises: a coupling case unit connected to a lower part of a circuit breaker; a DIN rail penetrated and inserted into a DIN rail insertion space in a longitudinal direction; and a fixing device having an elastic latching unit.

Description

Circuit breaker having elastic hook type joint device

The present invention relates to a circuit breaker equipped with an elastic engagement type coupling device, and more particularly, to a circuit breaker provided with an elastic engagement type coupling device that improves usability.

In general, the circuit breaker prevents damage to electrical products and lines connected to the load side by rapidly switching the opening and closing operation of the electric line when an overcurrent exceeding a set value or a short circuit occurs in the circuit to block the flow of current. Device. Such a circuit breaker is driven by manual or automatic operation, and preferably can be operated to automatically short circuit the current when an overcurrent occurs.

In addition, electrical and electronic equipment such as an electronic contactor, a circuit breaker, a circuit protection circuit breaker, and a communication device in a distribution box or a switchboard includes a configuration for arranging and mounting a plurality of electrical and electronic components. Here, the breaker is installed in the switchboard and is used in a state coupled to a DIN rail fixed to the switchboard, and the breaker is provided with a structure for coupling with the DIN rail.

Here, the DIN rail is an angle-shaped member made of a long length, and is formed in a form in which flanges are spread on both sides and a plurality of through holes are formed on the bottom.

And, the lower part of the circuit breaker is provided so that the lock lever is assembled in a slidable state and selectively moved to the outside of the circuit breaker, but is restored to the inside of the circuit breaker by a coil spring. Further, between the lower portion of the breaker and the locking lever, a groove into which the DIN rail is inserted is formed to insert the DIN rail, and flanges formed on both sides of the DIN rail are formed on the inner wall surface of the groove and the front end of the locking lever. Each of the engaging projections to be jammed was formed.

Here, in order to connect the circuit breaker to the DIN rail, the other side of the flange is pressed against the inclined surface of the locking protrusion formed on the locking lever while one side of the flange is inserted into the locking protrusion formed on the inner wall surface of the groove. Accordingly, the lock lever is temporarily retracted to the outside of the breaker by the coil spring, so that the din rail is coupled to the groove.

In addition, a separate fixing device for sliding the locking protrusion formed on the lock lever to the outside of the breaker was provided to separate the breaker from the DIN rail. At this time, as the user pulls the lock lever through the fixing device toward the outside of the breaker, the DIN rail is separated from each locking protrusion and separated.

However, in the conventional fixing device, after separating the circuit breaker from the DIN rail, the locking lever must be restored to the inside of the circuit breaker by the elastic force of the coil spring, but the position is not restored when the coil spring is released. There is a problem in that the lock lever is kept exposed to the outside of the breaker or even detached.

Accordingly, there is a problem in that the locking lever for fixing the circuit breaker to the DIN rail is not locked to the flange formed on both sides of the DIN rail, so that the circuit breaker cannot be fixed to the DIN rail.

Korean Registered Utility Model No. 20-0308088

In order to solve the above problems, the present invention is to solve the problem of providing a circuit breaker equipped with an elastic locking type coupling device for improved ease of use.

In order to solve the above problems, the present invention is connected to the lower portion of the circuit breaker that switches the connection of the electric line so as to cut off the current flow when the overcurrent exceeds a preset value, a pair of first stepped portion and the first edge The second stepped portion is protruded downwardly, respectively, and a fixing device insertion space opened in the width direction is formed between the first stepped portion and the second stepped portion, and the third stepped portion is protruded downwardly on the other side of the lower portion. Between the stepped portion and the second stepped portion and the third stepped portion, a din rail insertion space having both sides open in the longitudinal direction is formed, and a first catching portion is formed from the lower end of the inner wall surface of the third stepped portion to the first stepped portion and A coupling case part protruding in the direction toward the second stepped part and having a concave groove recessed upwardly on a lower surface between the first stepped part and the second stepped part; It is provided with a long elongated plate material is inserted through the length along the longitudinal direction of the DIN rail insertion space, the extension rail is bent integrally extending on both sides in the width direction to form a locking frame that is locked to the first catching projection; And it is inserted from the outside of the coupling case portion in the fixing device insertion space and is selectively moved to slide within a predetermined range, the hook bent portion is bent at the rear end is exposed to the outside of the coupling case portion, and the first engaging projection portion As the slide is moved to the opposite front end, a second locking projection is formed to selectively engage and constrain the locking frame, and a fixed device provided with an elastic engagement portion made of an elastic material that extends obliquely upward from the center portion and is engaged in the restraining groove. Including, the first stepped portion and the second stepped portion of the inner wall surface, the stopper stepped portion is protruded in the direction opposite to each other, and one end of the coupling case portion, the coupling case on both sides of the fixing device insertion space From one side of the wealth to the other side, it extends downward and slopes downward. Each of the inclined stepped portions is formed to be bent, and a plurality of stopper portions are protruded upwardly at a predetermined interval in the front-rear direction at both sides of the width direction of the fixing device, and the stopper step portion is spaced in the front-rear direction between each stopper portion. It provides a circuit breaker with an elastic engaging device, characterized in that formed less than the gap between the inclined stepped portion.

Through the above solution, the present invention provides the following effects.

First, as the elastic locking part of the elastic material extends upward from the center of the body of the fixing device and is locked in the restraining groove, the slide is automatically restored to the front in the retracted state, so the attachment and detachment of the breaker and the DIN rail can be performed quickly and conveniently. This can significantly improve the usability.

Second, when the DIN rail is detached, the temporarily retracted fixing device automatically extends upwards obliquely toward the rear side from the body of the fixing device in order to automatically restore the initial position to the initial position. The compact structure can significantly improve operational reliability.

Third, the fixing device slides in the front-rear direction, but the upper surface is supported on the lower surface of the guide projection and the lower surface is jammed while the fixed device is spaced apart from the lower surface of the coupling case part to prevent departure from the vertical direction. Durability can be remarkably improved by a structure that is locked on the upper surface of the stepped portion.

Fourth, a through slit corresponding to the width of the guide protrusion is recessed in the central portion in the width direction of the second locking protrusion of the fixing device for constraining the locking frame of the DIN rail part, and the fixing device is in contact with the lower surface of the guide protrusion while being supported. Since it slides freely in the front-rear direction after passing through the protrusion, the operation reliability can be remarkably improved.

1 is a perspective view showing a breaker equipped with an elastic locking type coupling device according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing a breaker equipped with an elastic engaging type coupling device according to an embodiment of the present invention.
Figure 3 is a perspective view showing the lower engagement state of the circuit breaker equipped with an elastic locking type coupling device according to an embodiment of the present invention.
4A and 4B are exemplary views showing a lower coupling state of a circuit breaker equipped with an elastic engagement type coupling device according to an embodiment of the present invention.
Figure 5 is a perspective view showing the lower portion of the fixing device in the circuit breaker equipped with an elastic engagement type device according to an embodiment of the present invention.
Figures 6a and 6b is a cross-sectional example showing a state of use of the circuit breaker equipped with an elastic locking type coupling device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a breaker equipped with an elastic engaging type coupling device according to a preferred embodiment of the present invention.

1 is an exploded perspective view showing a circuit breaker with an elastic engagement type coupling device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing a circuit breaker with an elastic engagement type coupling device according to an embodiment of the present invention , Figure 3 is a perspective view showing the lower engagement state of the breaker equipped with an elastic engaging type coupling device according to an embodiment of the present invention, Figures 4a and 4b is an elastic engaging type coupling device according to an embodiment of the present invention It is an exemplary view showing the lower coupling state of the provided circuit breaker, and FIG. 5 is a perspective view showing the lower portion of the fixing device in the circuit breaker provided with an elastic locking type coupling device according to an embodiment of the present invention, and FIGS. 6A and 6B are It is an exemplary cross-sectional view showing a state of use of a circuit breaker equipped with an elastic locking type coupling device according to an embodiment of the invention.

As shown in Figures 1 to 6b, the breaker 300 is provided with an elastic engaging type coupling device according to an embodiment of the present invention the coupling case portion 310, the DIN rail 120, and the fixing device 330 It includes.

Here, referring to Figure 1, the coupling case unit 310 is connected to the lower portion of the circuit breaker (1) for switching the connection of the electric line to cut off the current flow when the overcurrent exceeds a preset value. At this time, the coupling case unit 310 is a device provided to mediate the connection between the circuit breaker 1 and the DIN rail 120.

In addition, a plurality of first fastening holes 1b are formed through the breaker 1 in the vertical direction, and a plurality of second fastenings at positions corresponding to the first fastening holes 1b are formed in the coupling case part 310. The hole 315 may be formed through the vertical direction. At this time, threads may be formed on the inner circumference of the first fastening hole 1b and the second fastening hole 315, and as the separate fastening screws 1a are inserted and fastened in an aligned state, the breaker 1 ) And the coupling case part 310 may be fixed to each other.

On the other hand, referring to Figures 2 to 4b, the lower portion of the coupling case portion 310 may be selectively mounted as it is fastened to the DIN rail 120. At this time, it is preferable to understand that the DIN rail 120 is mounted in a switchboard (not shown) and disposed in a fixed state.

In detail, it is preferable that a pair of first stepped portions 311 and second stepped portions 312 are protruded downwardly on the lower one side edge of the coupling case portion 310, respectively. In addition, it is preferable that the third stepped portion 313 is protruded downward to a height corresponding to the first stepped portion 311 and the second stepped portion 312 on the other lower side of the coupling case portion 310. . Here, it is preferable to understand that the lower surfaces of the first stepped portion 311, the second stepped portion 312, and the third stepped portion 313 are disposed opposite to the inner wall surface of the switchboard (not shown).

In addition, between the first stepped portion 311 and the second stepped portion 312, a fixing device insertion space s1 having both sides opened along the width direction n of the din rail portion 120 is formed. . At this time, the fixing device 330 is disposed in the fixing device insertion space s1.

Here, the coupling case portion 310 is inserted into the elastic locking portion 333 of the fixing device 330 is inserted into the lower surface between the first step portion 311 and the second step portion 312 so as to be locked. The restraining groove 316 is formed to be recessed upward. That is, the restraining groove 316 is recessed upward on the lower surface corresponding to the fixing device insertion space s1 of the coupling case portion 310. At this time, the restraining groove 316 is recessed in a rectangular cross-sectional shape, and may be set to a depression depth exceeding the length of the elastic locking portion 333.

In addition, when the fixing device 330 is inserted into the fixing device insertion space s1 at one end of the coupling case part 310, the elastic engaging part 333 is elastically deformed and guided to the restraining groove 316. Preferably, the inclined guide surface 317 is formed to be inclined in the center of the coupling case part 310 in the longitudinal direction (m). At this time, it is preferable to understand that the inclined guide surface 317 is formed at a position corresponding to the rear side of the fixing device 330.

Accordingly, when the fixing device 330 is inserted from the outside of the coupling case portion 310 into the fixing device insertion space s1, the elastic engaging portion 333 is guided by the inclined guide surface 317 and temporarily As it is elastically deformed, it can be stably inserted into the restraining groove 316 and restrained.

In addition, the lower end of each inner wall surface of the first step portion 311 and the second step portion 312 extends and protrudes in opposite directions so that the lower edge of the body of the fixing device 330 engages the locking step portion. It is preferred that (318a, 218b) are formed respectively. In this case, the locking step portions 318a and 218b are formed at the lower end of the inner wall surface of the first stepping portion 318a and the second stepping portion 312 formed at the lower end of the inner wall surface of the first stepping portion 311. It is preferable to include a second engaging stepped portion 318b to be formed.

Here, the lower surfaces of both sides of the body width direction of the fixing device 330 are locked to the upper surfaces of the locking step portions 318a and 218b, so that the fixing device 330 is released to the lower side of the coupling case portion 310. This can be prevented. At the same time, as the fixing device 330 is guided in the front-rear direction, the fixing device 330 may be selectively moved in the front-rear direction within a predetermined range.

Therefore, the first stepped portion 311 and the second stepped portion 312 extends protruding in opposite directions to the lower ends of the inner wall surfaces, so that the lower edge of the fixing device 330 is engaged with the locking stepped portion ( 318a, 218b) are respectively formed so that the fixing device 330 slides in the front-rear direction, but it is prevented from falling in the up-down direction. Therefore, when the DIN rail 120 is selectively detached from the lower portion of the coupling case part 110, it is operated. Precision can be significantly improved.

In addition, between the first stepped portion 311 and the second stepped portion 312 and the third stepped portion 313, both sides are opened along the longitudinal direction m of the din rail portion 120. The rail insertion space s2 is formed. At this time, the DIN rail 120 is selectively disposed in the DIN rail insertion space s2. Here, the fixing device insertion space (s1) and the DIN rail insertion space (s2) is preferably understood as a space formed between the lower portion of the coupling case portion 310 and the switchboard (not shown).

In addition, at least one first catching protrusion 314 from the lower end of the inner wall surface of the third stepped portion 313 is provided on the coupling case portion 310, the first stepped portion 311 and the second stepped portion 312. ).

On the other hand, the din rail 120 is provided with a long elongated plate material is inserted through the longitudinal rail (m) in the din rail insertion space (s2), the width direction (n) is integrally bent extending on both sides of the agent A locking frame 121 is formed to be locked to each of the one catching protrusion 314 and the second catching protrusion 332 to be described later.

Here, the locking frame 121 may be formed to be bent in a form in which the ends extending obliquely upward from both ends in the width direction (n) of the DIN rail 120 extend in both directions in the width direction (n). At this time, the coupling case portion 310 is the DIN rail as the lower surface of the end of the locking frame 121 is selectively connected to the upper portion of the first locking projection 314 and the second locking projection 332 It can be fixed to 120.

In addition, a plurality of through-holes 122 may be formed through the din-rail 120 at predetermined intervals along the lengthwise direction in the vertical direction. At this time, as the coupling case part 310 is connected to the DIN rail 120, a separate holder (not shown) is inserted into the through hole 122, so that the breaker 1 and the coupling case part ( 310) may be blocked from moving along the longitudinal direction of the DIN rail 120.

On the other hand, the fixing device 330 is inserted into the fixing device insertion space (s1) from the outside of the coupling case portion 310 and is selectively moved within a predetermined range.

In addition, the rear end portion of the fixing device 330 is formed with a hook bent portion 331 is bent upward is disposed exposed to the outside of the coupling case portion (310). At this time, the locking bent portion 331 is exposed to the outside of the coupling case portion 310 even when the fixing device 330 slides within a predetermined range toward the DIN rail 120 and is inserted to the maximum. It is desirable to understand that.

In addition, the fixing device 330 is a second locking stone that is selectively locked and constrained by the locking frame 121 as the slide is moved toward the DIN rail 120 at the front end portion opposite to the first locking protrusion 314. The base 332 is formed. At this time, it is preferable that the lower surface of the locking frame 121 is selectively connected to the upper surface of the second locking protrusion 332.

Moreover, the second catching protrusion 332 may be formed to be bent upward toward the front end. Accordingly, when the DIN rail 120 is pressed on the inclined surface of the lower portion of the second locking protrusion 332 and inserted into the DIN rail insertion space s2, the fixing device 330 is coupled to the coupling case part 310 After temporarily retreating to the outside of the can be re-advanced by the elastic restoring force.

Here, when the user pulls the locking bent portion 331, the second locking protrusion 332 is moved as the fixing device 330 slides outwardly of the coupling case portion 310 within a predetermined range. It is separated from the locking frame 121 of the DIN rail 120. Accordingly, the coupling case part 310 can be easily separated from the DIN rail 120.

In addition, when the external force acting on the locking portion 331 is released in the state where the DIN rail 120 is disposed in the DIN rail insertion space s2, the elastic locking part 333 of the fixing device 330 is released. Through the fixing device 330 is automatically restored to the slide toward the DIN rail (120). Through this, the locking frame 121 may be fixedly connected to the first locking protrusion 314 and the second locking protrusion 330.

On the other hand, referring to Figures 3 to 6b, the body of the fixing device 330 is provided in a flat shape, the body of the fixing device 330 is the first step portion 311 and the second step portion ( 312) between the lower surface of the coupling case portion 310 is preferably spaced apart at a predetermined interval.

Here, when the coupling case portion 310 between the first stepped portion 311 and the second stepped portion 312 is attached, the coupling from the restraining groove 316 is provided so that the body of the fixing device 330 is seated. It is preferable that the guide protrusion 319 is protruded downwardly at a position spaced apart from the inside of the case part 310.

At this time, the guide projection 319 may extend along the width direction (n) of the coupling case portion 310, the height of the guide projection 319 extending in the vertical direction and the lower surface of the coupling case portion 310 It is preferable that the fixing device 330 is formed to substantially correspond to the gap between the upper surfaces of the body.

Accordingly, while the body of the fixing device 330 is spaced apart at a predetermined distance from the lower surface of the coupling case portion 310, the upper surface is supported in contact with the lower surface of the guide protrusion 319, and at the same time, the fixing The lower surfaces of the body 330 in the width direction on both sides of the body are locked to the upper surfaces of the locking step portions 318a and 218b. Therefore, since the fixing device 330 slides in the front-rear direction but is prevented from falling in the vertical direction, operation precision and durability are significantly improved when the DIN rail 120 is selectively detached from the lower portion of the coupling case part 110. Can be.

Here, in the center portion in the width direction of the second catching projection 332, the guide projection so that the fixing device 330 slides forward and backward in the fixing device insertion space s1 through the guide projection 319 ( It is preferable that the through-slit 334 corresponding to the width of 319) is recessed.

Accordingly, since the body of the fixing device 330 is supported while being in surface contact with the lower surface of the guide protrusion 319, it can slide freely in the front-rear direction, thereby significantly improving the operational reliability of the product.

On the other hand, it is preferable that the fixing device 330 is provided with an elastic engaging portion 333 that is obliquely upwardly extended from the center of the body toward the rear side of the fixing device 330 to be locked and restrained in the restraining groove 316. The elastic engaging portion 333 is preferably provided with an elastic material. At this time, a through hole may be formed in the body of the fixing device 330 in the vertical direction at a position corresponding to the elastic engaging portion 333.

Here, the elastic engaging portion 333 is the body of the fixing device 330 is disposed opposite to the position corresponding to the restraining groove 316 when the fixing device 330 is inserted into the fixing device insertion space (s1) It is preferred to extend integrally from the central portion.

In addition, the elastic engaging portion 333 is the coupling case from the central portion of the body of the fixing device 330 so that the fixing device 330 is automatically restored to the front in the retracted state of the coupling case portion 330 to the outside. It is preferable to extend integrally inclined upward in the outer direction of the part 330. At this time, the rear direction of the fixing device 330 and the outer direction of the coupling case portion 330 mean the same direction.

Here, in the elastic engaging portion 333, an area connected to the body of the fixing device 330 acts as a fixing end, and an end side extending obliquely upward is elastically deformed in the front-rear direction of the fixing device 330. This is preferred.

Accordingly, in order to automatically restore the fixing device 330 temporarily retracted when the DIN rail 120 is detached, the elastic engaging portion 333 is inclined toward the rear side from the body of the fixing device 330. The operation reliability can be remarkably improved due to the compact structure that is integrally extended upwardly and is constrained by the restraining groove 316 formed to be recessed upward in the coupling case part 310. Therefore, it is possible to continuously provide a stable elastic restoring force that is automatically returned to the initial position in a state where the fixing device 330 is retracted.

In addition, unlike the conventional method in which the coil springs are individually provided and mounted, the elastic locking portion 333 is integrally provided with the fixing device 330, so that the separation of the coil springs is prevented beforehand, and the operational reliability and use of the product Convenience can be significantly improved.

And, in the process of inserting the fixing device 330 into the fixing device insertion space (s1), the elastic engaging portion 333 is the body 330a of the fixing device 330, the fixing device insertion space (s1) ) Is preferably elastically deformed in the front-rear direction of the fixing device 330 so as to be locked and restrained in the restraining groove 316 in a state arranged in the. At this time, it is preferable to understand that the end of the elastic engaging portion 333 is freely elastically deformed in the vertical direction.

At this time, the inclined guide surface 317 is formed to be inclined at one end of the coupling case portion 310, the elastic locking portion 333 is elastic when the fixing device 330 is inserted into the fixing device insertion space s1 It can be transformed and guided. Therefore, when the fixing device 330 is inserted into the fixing device insertion space s1, assembly can be easily performed with minimal external force, thereby improving assembly and manufacturing convenience.

In addition, the fixing device 330 is retracted to the outside of the coupling case portion 310 by an elastic restoring force as the elastic engaging portion 333 is elastically inserted into the restraining groove 316 to be locked and constrained. With automatic slide restoration.

On the other hand, it is preferable that a pair of stopper step portions 311a and 312a extend and protrude in directions opposite to each other on the top of each inner wall surface of the first step portion 311 and the second step portion 312. At this time, the stopper stepped portions 311a and 312a are first stopper stepped portions 311a extending and protruding in the longitudinal direction (m) of the coupling case portion 310 at the upper end of the inner wall surface of the first stepped portion 311. And, it is preferable to include a second stopper step portion 312a extending and protruding in the longitudinal direction (m) of the coupling case portion 310 at the upper end of the inner wall surface of the second step portion 312.

Here, the height of each of the stopper stepped portions 311a and 312a in the vertical direction may be formed to correspond substantially to the height of the guide projection 319 in the vertical direction. Further, each of the stopper stepped portions 311a and 312a may be formed at a position spaced apart from the other side of the width direction (n) of the coupling case portion 310 than the guide projection 319.

In addition, at one end of the coupling case portion 310, at one side of the coupling case portion 310 on both sides of the fixing device insertion space s1, that is, on both sides in the longitudinal direction (m) of the coupling case portion 310. It is preferable that the inclined stepped portions 317a and 317b are formed to be extended downwardly downwardly toward the other side, but the other end surface is bent, respectively.

Here, the inclined stepped portions 317a and 317b are formed at a position adjacent to the inner wall surface of the first stepped portion 311, but in the width direction of the first stopper stepped portion 311a and the coupling case portion 310 n) is formed in a position adjacent to the inner wall surface of the first inclined stepped portion 317a, and the second stepped portion 312 is spaced apart, the second stopper stepped portion 312a and the coupling case portion 310 It is preferable to include a second inclined stepped portion (317b) spaced apart in the width direction (n) of.

On the other hand, it is preferable that the plurality of stopper portions 335a, 335b, 336a, and 336b are protruded upwardly from each other in the width direction on both sides of the fixing device 330 at predetermined intervals. It is preferable that the stopper portions 335a, 335b, 336a, and 336b are made of an elastic material and integrally connected to the body of the fixing device 330. In addition, a plurality of through holes may be formed through the body of the fixing device 330 at positions corresponding to the stopper parts 335a, 335b, 336a, and 336b, respectively.

At this time, each of the stopper portion (335a, 335b, 336a, 336b) is the inclined step portion (317a) when the fixing device 330 is inserted into the fixing device insertion space (s1) from the outside of the coupling case portion (310) , 317b) is pressed by the inclined surface of the fixing device 330 is temporarily restored in the downward direction is preferably restored after the elastic deformation.

Here, the stopper portion (335a, 335b, 336a, 336b) is a pair of first stopper portions (335a, 335b) and the fixing device protruding upwards and downwards, respectively, at the rear portions on both sides in the width direction of the fixing device (330), and the fixing device ( It includes a pair of second stopper portions 336a and 336b spaced apart in the front-rear direction at predetermined intervals from each of the first stopper portions 335a and 335b, which are protruded upward at both sides in the width direction of 330). Preferably.

At this time, the rear surface of each of the first stopper portions 335a and 335b is selectively caught by the other curved end faces of the inclined stepped portions 317a and 317b, so that departure is limited, and each of the second stopper portions 336a and 336b ), The front surface of each of the stopper step portions 311a and 312a may be selectively engaged.

In addition, an interval between the stopper portions 335a, 335b, 336a, 336b in the front-rear direction such that the fixing device 330 is selectively moved in the front-rear direction within a predetermined range is the stopper step portions 311a, 312a and the It is preferably formed less than the distance between the inclined stepped portions (317a, 317b).

In detail, referring to FIG. 6A, the second locking protrusion 332 is inserted into the DIN rail insertion space s2 while the fixing device 330 is advanced forward toward the DIN rail insertion space s2. do. At this time, the front surface of each of the second stopper portions 336a and 336b is caught on one surface of each of the stopper step portions 311a and 312a, so that the advancement of the fixing device 330 is limited.

In addition, referring to FIG. 6B, when the user pulls the locking bent portion 331, the elastic locking portion 333 is compressed while the fixing device 330 is retracted outwardly of the coupling case portion 310. The elastic restoring force to the front of the fixing device 330 is provided.

Here, the back of the elastic engaging portion 333 is caught in the back of the restraining groove 316, so that the retraction of the fixing device 330 is limited. At the same time, the rear surface of each of the first stopper portions 335a and 335b is selectively locked to the other curved end faces of the inclined step portions 317a and 317b, thereby limiting departure.

Accordingly, when the external force that the fixing device 330 is pulled out of the coupling case portion 310 is released, the fixing device 330 is inserted into the din rail by the elastic restoring force of the elastic catching portion 333. It can be advanced forward toward the space s2.

As such, the elastic engaging portion 333 made of an elastic material is inclined upwardly extending from the central portion of the body of the fixing device 330 to be locked and restrained in the restraining groove 316. Accordingly, since the fixing device 330 is automatically restored to the front in a retracted state to the outside of the coupling case part 310, the attachment and detachment of the breaker 1 and the DIN rail 120 is quickly and conveniently performed. This can significantly improve the usability.

In addition, a plurality of stopper portions 335a, 335b, 336a, 336b are protruded upward from each other at predetermined intervals in the front-rear direction on both sides in the width direction of the fixing device 330, but the stopper step portions 311a, 312a. And the inclined stepped portions 317a and 317b are formed to be less than the distance between them, so that the fixing device 330 slides within a predetermined range, so that operation precision can be remarkably improved.

At this time, the terms "include", "compose" or "prepare" as described above means that the corresponding component can be intrinsic, unless otherwise stated, except for other components. It should not be interpreted as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as generally understood by a person skilled in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted as being consistent with the contextual meaning of the related art, and are not to be interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

As described above, the present invention is not limited to each of the above-described embodiments, and can be modified by a person having ordinary skill in the art to which the present invention pertains without departing from the scope of the claims of the present invention. The implementation of such modifications is within the scope of the present invention.

300: breaker equipped with an elastic engaging device 310: the coupling case
311: first stepped portion 312: second stepped portion
313: third stepped portion 314: first catching projection
316: restraining groove 317: slope guide surface
317a: first inclined stepped portion 317b: second inclined stepped portion
318a: first engaging stepped portion 318b: second caughted stepped portion
120: DIN-rail 121: hanging border
330: fixing device 331: the hook bent
232: second engaging projection 333: elastic engaging portion
334: passing slit

Claims (5)

It is connected to the lower portion of the circuit breaker that switches the connection of the electric line so as to cut off the current flow when the overcurrent exceeds a predetermined value, a pair of the first stepped portion and the second stepped portion are protruded downwardly, respectively, on the lower side edge, A fixing device insertion space opened in a width direction is formed between the first step portion and the second step portion, and the third step portion is protruded downwardly on the other side of the lower portion, and the first step portion and the second step portion and the second step portion are protruded downward. A din rail insertion space having both sides opened in the longitudinal direction is formed between the three stepped portions, and a first catching protrusion is protruded in a direction toward the first stepped portion and the second stepped portion from the bottom of the inner wall surface of the third stepped portion. , A coupling case portion in which a restraining groove is recessed upwardly on a lower surface between the first step portion and the second step portion;
It is provided with a long elongated plate material is inserted through the length along the longitudinal direction of the DIN rail insertion space, the extension rail is bent integrally extending on both sides in the width direction to form a locking frame that is locked to the first catching projection; And
It is inserted into the fixing device insertion space from the outside of the coupling case portion and selectively slides within a predetermined range, a hooking bent portion is bent at the rear end, exposed to the outside of the coupling case portion, and faces the first catching projection portion. As the slide is moved to the front end portion, a second locking projection is formed to selectively engage and constrain the locking frame. Ha,
The first stepped portion and the second stepped portion of each inner wall surface, the stopper step portion is protruded to extend in the direction opposite to each other,
One end portion of the coupling case portion is formed on both sides of the fixing device insertion space, the inclined step portions are formed to extend downwardly downwardly downward from one side of the coupling case portion to the other side, and the other end is bent,
A plurality of stopper portions are protruded upward from each other at a predetermined interval in the front-rear direction on both sides in the width direction of the fixing device. Breaker equipped with an elastic locking type coupling device. According to claim 1,
The body of the fixing device is spaced apart at a predetermined distance from the lower surface of the coupling case portion,
A guide protrusion is protruded downwardly at a position spaced apart from the restraining groove to the inside of the coupling case portion so that the body of the fixing device is seated on the lower surface of the coupling case portion between the first step portion and the second step portion,
A breaker having an elastic engagement type coupling device, characterized in that a passage slit corresponding to the width of the guide protrusion is recessed in the central portion in the width direction of the second engagement protrusion. According to claim 1,
The elastic engaging portion is integrally extended upwardly inclined upwardly from the center portion of the body of the fixing device to the outer side of the coupling case so that the fixing device is automatically slided forward in the retracted state,
Elasticity characterized in that an inclined guide surface is inclined at a central portion in the longitudinal direction of the coupling case portion to be elastically deformed and guided to the restraining groove when the fixing device is inserted into the fixing device insertion space at one end of the coupling case portion. Circuit breaker with a locking device. delete According to claim 1,
The first stepped portion and the second stepped portion of the inner wall surface are protruded in opposite directions to each other, and an elastic engaging type coupling device is provided, characterized in that a locking stepped portion is formed in which the lower surfaces of the fixing devices are locked. breaker.

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