KR200229100Y1 - fixing structure for terminal screw of magnetic contactor - Google Patents

Abstract

The terminal screw mounting structure of the magnetic contactor according to the present invention not only enables efficient connection work with a ring-type cable terminal or a parallel connection terminal, but also prevents the loss of the terminal screw during the operation. To improve convenience in use, the upper plate 20 covers the upper surface and the outer plate formed on the front end of the main plate 12 and the bottom end of the main plate 12 formed with a plurality of screw operation holes 12a at both ends thereof. A top cover 10 comprising an inner cover lip 14 positioned between the cover lip 13 and the outer cover lip 13 and the screw operation hole 12a, and a fixed contactor 30 at one end thereof. Attached to the upper frame 20, the terminal screw 40 for crimping the cable terminal by screwing the upper frame 20 through the fixed contact 30, and the terminal screw ( An elastic support that causes a gap between the fixed contactor 30 when the terminal screw 40 is separated from the fixed contactor 30 by applying an elastic tensile force to the main plate 12 side of the top cover 10. It comprises a means, the elastic support means has a through hole (70a) corresponding to the screw operating hole (12a) and the edge is attached to the bottom surface of the main plate 12 of the top cover 10, the main plate ( 12 is inserted into the fixing plate 70 and the main plate 12 through the through hole 70a of the fixing plate 70 to form an appropriate space therebetween, and the other end thereof is connected to the terminal. By being sandwiched between the head portion 42 of the screw 40 and the washer 50 located below the head portion 42, the terminal screw 40 is elastically mounted in the state of being mounted on the upper frame 20. Tensile deformation to lift the terminal screw 40 Is characterized by being a Involute spring 80 exerts a force in the direction.

Description

Fixing structure for terminal screw of magnetic contactor}

The present invention relates to a magnetic contactor, and more particularly, to a terminal screw mounting structure of the magnetic contactor that can easily detach the terminal screw connected to the cable terminal.

In general, a magnetic contactor forms a magnetic switch together with a thermal relay for thermal protection such as a motor and performs an opening / closing of an electric circuit. A contact portion, an electromagnet portion for controlling the operation of the contact portion, an upper and lower frame of an insulating material provided with the contact portion and the electromagnet portion, and a cross mounted on the frame to move up and down for interworking with the contact portion and the electromagnet portion. It is made right.

Here, the top cover 10 is installed above the upper frame to prevent the user from malfunctioning by indicating the specifications of the magnetic contactor and to cover the upper surface of the upper frame, as shown in FIG. 1. Is a main plate 12 having a plurality of screw operation holes 12a at both ends thereof, an outer cover lip 13 formed at a bottom end of the main plate 12, and an outer cover lip 13 and screw operation. It consists of the inner cover lip 14 located between the holes 12a, and the auxiliary lip 15 formed at right angles between each cover lip 13 and 14 and the main plate 12. As shown in FIG.

In addition, a plurality of fixed contactors 30 and a plurality of terminal screws 40 penetrating one end of the fixed contactor 30 are mounted at the front end of the upper frame 20, and fixed to the terminal screws 40. A washer 50 is provided between the contacts 30.

Meanwhile, the magnetic contactor according to the related art is shipped with the terminal screw 40 and the top cover 10 attached to the upper frame 20. As shown in FIG. 2A, a general cable for the terminal screw 40 is shown. When connecting the terminal 60, the user inserts a tool (D) such as a screwdriver into the screw operation hole (12a) of the top cover 10 in a state where the user installed the magnetic contactor, and the terminal screw 40 to the upper frame 20 ), Loosen the cable terminal 60 and insert the cable terminal 60 into the gap formed between the washer 50 and the fixed contactor 30, and then tighten the terminal screw 40 again to connect the washer 50 with the washer 50. It is made to be connected to the electric circuit by pressing between the fixed contact (30).

However, according to the related art, since the upper end of the terminal screw 40 is blocked at a constant height by the auxiliary lip 15 of the top cover 10, the terminal screw 40 is not completely removed from the upper frame 20. As shown in FIG. 2B, in order to connect the ring type cable terminal 62 or the parallel connection terminal board (not shown) to the terminal screw 40, the terminal screw 40 is removed from the upper frame 10 while the top cover 10 is peeled off. 20) to be completely removed from the ring-type cable terminal 62 or parallel connection terminal board, and must go through a cumbersome process of fastening to the upper frame 20 again. Therefore, not only is it difficult to efficiently perform the connection work, but also the risk of dropping the terminal screw 40 during the work is also increased, causing a problem that the convenience of use of the magnetic contactor is reduced.

The present invention has been devised to solve the problems of the prior art as described above, by making the terminal screw easily detachable using the volute spring, the terminal screw mounting structure of the magnetic contactor to increase the work efficiency when connecting the cable terminal It aims to provide.

In order to achieve the above object, the present invention covers an upper surface of an upper frame and has a plurality of screw operation holes formed at both ends thereof, and an outer cover lip formed at the bottom end of the main plate, and the outer cover lip and screw operation. A top cover comprising an inner cover lip disposed between the holes, an upper frame having a fixed contactor at one end thereof, and a terminal screw for crimping and connecting the cable terminal by screwing the upper contact through the fixed contactor; By applying an elastic tensile force to the main plate side of the top cover to the terminal screw to the terminal screw is separated from the fixed contactor comprises an elastic support means for creating a gap between the fixed contactor, the elastic support means is a screw The main plate of the top cover is provided with a through hole matching the operation hole. The edge is attached to the bottom surface of the tread plate to form a suitable space between the main plate and one end of the fixing plate through the through hole of the fixing plate and is inserted between the main plate and the other end of the terminal screw. It is fitted between the head portion and the washer located below the head portion by elastically deformed elastically in the state that the terminal screw is mounted on the upper frame, it consists of a volute spring for applying a force in the direction of lifting the terminal screw It provides a terminal screw mounting structure of the magnetic contactor.

1 is a perspective view showing the structure of an upper frame and a top cover attached thereto of a general magnetic contactor

Figure 2a is a schematic state diagram showing the operation of connecting a typical cable terminal in a conventional magnetic contactor

Figure 2b is a schematic state diagram showing the operation of connecting the ring-type cable terminal in the conventional magnetic contactor

Figure 3 is an exploded perspective view showing the components applied to the terminal screw mounting structure of the magnetic contactor according to the embodiment of the present invention

Figure 4a is a schematic cross-sectional view showing a state in which the terminal screw is coupled to the upper frame in the terminal screw mounting structure of the magnetic contactor according to the embodiment of the present invention

Figure 4b is a schematic cross-sectional view showing a state in which the terminal screw is separated from the upper frame in the terminal screw mounting structure of the magnetic contactor according to the embodiment of the present invention

Explanation of symbols for the main parts of the drawings

10: top cover 12: main plate

12a: screw operating hole 12b: screw guide

13: outer cover lip 14: inner cover lip

15: auxiliary lip 20: upper frame

30: fixed contact 40: terminal screw

42: head 60: cable terminal

62: ring type cable terminal 70: fixed plate

70a: through hole 80: volute spring

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 to 4B, and the same parts as those of the conventional configurations of the present invention will be given the same reference numerals.

Figure 3 is an exploded perspective view showing the components applied to the terminal screw mounting structure of the magnetic contactor according to an embodiment of the present invention, Figure 4a is a terminal screw upper frame in the terminal screw mounting structure of the magnetic contactor according to an embodiment of the present invention Figure 4b is a schematic cross-sectional view showing a state coupled to, Figure 4b is a schematic cross-sectional view showing a state in which the terminal screw is separated from the upper frame in the terminal screw mounting structure of the magnetic contactor according to the embodiment of the present invention.

The terminal screw mounting structure of the magnetic contactor according to the embodiment of the present invention covers the upper surface of the upper frame 20 as shown in FIG. 3 and has a plurality of screw manipulation holes 12a formed at both ends thereof. ) And a top cover composed of an outer cover lip 13 formed at the bottom end of the main plate 12 and an inner cover lip 14 positioned between the outer cover lip 13 and the screw operation hole 12a. 10, an upper frame 20 having a fixed contactor 30 attached to one end thereof, and a cable terminal 60 penetrated through the fixed contactor 30 to the upper frame 20 (see FIG. 2B). ) And the terminal screw 40 is separated from the fixed contactor 30 by applying an elastic tensile force to the main plate 12 side of the top cover 10 to the terminal screw 40 for crimping and connecting the terminal screw 40. If there is a gap between the fixed contact 30 It includes an elastic support means.

Here, the elastic support means is provided with a through hole (70a) corresponding to the screw operation hole (12a) and the edge is attached to the bottom surface of the main plate 12 of the top cover 10 by the main plate 12 One end is inserted through the fixing plate 70 and the through plate 70a of the fixing plate 70 to form an appropriate space therebetween, and the other end thereof is inserted into the terminal plate 40. The terminal screw 40 is elastically deformed in a state in which the terminal screw 40 is mounted on the upper frame 20 by being inserted between the head portion 42 of the head 42 and the washer 50 positioned below the head portion 42. It is composed of a volute spring 80 for applying a force in the direction of lifting the screw (40).

Referring to the working process of connecting the ring-type cable terminal or parallel connection terminal board in the terminal screw mounting structure of the magnetic contactor according to the embodiment of the present invention configured as described above are as follows.

As shown in FIG. 4A, in the state where the terminal screw 40 penetrates the fixed contactor 30 and is coupled to the upper frame 20, the volute spring 80 has one end fixed plate 70 and the other end thereof. The elastically tensioned state is maintained between the head portions 42 of the fixed terminal screw 40. Therefore, as shown in FIG. 4B, when the terminal screw 40 is lifted and pulled out of the fixed contactor 30, the tensioned volute spring 80 is lifted and lifts the terminal screw 40 and the washer 50. In the state, the ring-type cable terminal 62 (see FIG. 2B) or the parallel connection terminal plate is inserted into the terminal screw 40, and the terminal screw 40 is retightened so that the ring-type cable terminal 62 or the parallel connection terminal plate is washer ( 50) and the fixed contact between the fixed contact (30).

As described above, according to the terminal screw mounting structure of the magnetic contactor according to the present invention, not only can the connection work with the ring-type cable terminal or the parallel connection terminal be efficiently performed, but there is no fear of losing the terminal screw in the process. Therefore, there is an advantage that can increase the ease of use of the magnetic contactor.

Claims (1)

The upper frame 20 to which the fixed contactor 30 is attached, the main plate 12 and the outer cover lip which cover the upper surface of the upper frame and have a plurality of screw operation holes 12a formed at both ends thereof. And a top cover 11 composed of an inner cover rim 14, a terminal screw 40 connected to a cable terminal by screwing to an upper frame through a screw operating hole and a fixed contactor of the top cover, and A fixing plate 70 having a through hole 70a coinciding with the screw operation hole and attached to the bottom of the main plate of the top cover to form a space between the main plate, and formed between the fixing plate and the main frame The upper end portion is fitted into the space and the lower end of the terminal screw mounting structure of the magnetic contactor, characterized in that it is inserted between the head and the washer of the terminal screw to act the elastic force in the lifting direction to the terminal screw.