A direct-acting DC relay

Abstract

The present invention discloses a direct-acting DC relay, comprising an upper shell, a lower shell, two static contact lead-out terminals and a coil part; the lower shell is fixed to the bottom of the upper shell; the coil part is installed in the middle and lower part of the cavity surrounded by the upper shell and the lower shell; the coil part comprises a coil frame and a coil lead-out pin, and the coil lead-out pin is connected to the coil frame; the lead-out part of the coil lead-out pin comprises a horizontal section led out from the coil frame corresponding to the middle position of the relay and an upward lead-out section bent upward from the outer end of the horizontal section; the upper end of the upward lead-out section and the surrounding wall of the upper shell form a plug-in connector; the relay is also provided with a support part, and the support part is supported below the horizontal section of the lead-out part of the coil lead-out pin. The present invention makes the wiring direction of the load end of the product and the connector the same, which is convenient for the application of the product; and can improve the plug-in and pull-out stability of the product connector, thereby effectively preventing the disadvantage of product connection failure.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a direct-acting DC relay. Background Art

[0002] A DC relay in the prior art adopts a direct-acting magnetic circuit structure, that is, two static contact lead-out terminals (also load lead-out terminals) are respectively arranged on the top of the relay, and the bottom ends of the two static contact lead-out terminals are set as static contacts, the current flows into one of the static contact lead-out terminals, and the current flows out of the other static contact lead-out terminal, and a moving spring and a push rod component are provided below the two static contact lead-out terminals. The moving spring adopts a straight-type moving spring (also called a bridge-type moving spring), and the two ends of the moving spring are set as moving contacts. The moving spring is installed in the push rod component through a spring, and the push rod component is connected to the direct-acting magnetic circuit at the bottom of the relay. Under the action of the direct-acting magnetic circuit, the push rod component drives the moving spring to move upward, so that the two ends of the moving spring are respectively in contact with the bottom ends of the two static contact lead-out terminals, thereby connecting the load. In the prior art, the DC relay of this type, since the coil frame is located in the middle and lower part of the relay, the coil lead pin is usually led out from the middle part of the DC relay, that is, from the upper flange of the coil frame to the side, or from the lower flange of the coil frame to the side from the bottom of the relay. This will cause the load end of the relay, the mounting foot screw fixation and the installation direction of the connector to be in different directions, which is not conducive to the human-machine interaction of the client automation equipment. Alternatively, it is led upward from the bottom of the relay. Although it ensures that the load end of the relay, the mounting foot screw fixation and the installation direction of the connector are in one direction, when it is installed in the battery pack and the client automation manipulator installs the connector, in order to ensure that the automated assembly process does not interfere, sufficient assembly space is required, which will cause the battery pack to be too large. If it is bent upward from the middle, since the coil lead pin is in a suspended state at the bent position, the upper end of the coil lead pin is used as a plug-in connector during use, which is easy to cause the connector lead pin to deform during the plug-in process, and then cause the connection failure. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a direct-acting DC relay. Through structural improvement, on the one hand, the wiring directions of the load end of the product and the connector are made the same, thereby facilitating the application of the product; on the other hand, the stability of the product connector plugging and unplugging can be improved, thereby effectively preventing the disadvantage of product connection failure.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a direct-acting DC relay, comprising an upper shell, a lower shell, two static contact lead-out terminals and a coil part; the lower shell is fixed to the bottom of the upper shell; the two static contact lead-out terminals are adapted to the top of the upper shell; the coil part is installed in the middle and lower part of the cavity surrounded by the upper shell and the lower shell; the coil part comprises a coil frame and a coil lead-out pin, the coil lead-out pin is connected to the coil frame, and the lead-out part of the coil lead-out pin extends from the side of the coil frame; the lead-out part of the coil lead-out pin comprises a horizontal section led from the coil frame corresponding to the middle position of the relay and an upward lead-out section bent upward by the outer end of the horizontal section; the upper end of the upward lead-out section and the surrounding wall of the upper shell form a plug-in connector; the relay is also provided with a support portion, and the support portion is supported below the horizontal section of the lead-out part of the coil lead-out pin.

[0005] The coil frame comprises an upper flange, a lower flange and a winding window between the upper and lower flanges; the inner end of the horizontal section of the lead-out part of the coil lead-out pin is connected to the upper flange of the coil frame.

[0006] The inner side end of the horizontal section of the lead-out portion of the coil lead-out pin is integrally connected to the upper flange of the coil frame by injection molding.

[0007] The support portion is a separate part formed by a bracket, and the bracket is installed between the upper shell and the lower shell.

[0008] The top of the support portion is also provided with a step.

[0009] The support portion is integrally connected to the lower housing by injection molding.

[0010] The upper shell and the lower shell match each other at the middle position corresponding to the relay. The lower shell is provided with a guide rail for guiding the bracket to be installed. The two sides of the bracket are respectively installed into the lower shell along the guide rail of the lower shell, and the top end of the bracket is against the horizontal section of the lead-out part of the coil lead-out pin.

[0011] The upper shell and the lower shell match at a position corresponding to the bottom of the relay, and the lower shell is a cover plate; a guide rail for guiding the bracket to be installed in the upper shell is provided in the upper shell, and the two sides of the bracket are respectively installed in the upper shell along the guide rail of the upper shell, and the top of the bracket is against the horizontal section of the lead-out part of the coil lead-out pin; the cover plate is provided with a slot, and the bottom end of the bracket is matched in the slot of the cover plate.

[0012] The bracket is provided with vertical convex strips on two opposite sides respectively; in the upper shell or the lower shell, grooves are provided at the positions corresponding to the two opposite convex strips of the bracket to form the guide rail, and the two convex strips of the bracket are respectively guided and fitted in the two grooves of the upper shell or the lower shell, and the bracket is prevented from swinging in the upper shell or the lower shell by interference fit.

[0013] The cross section of the bracket is in a cross shape.

[0014] The lower section of the convex strip is provided with first convex buds for interference fit on both sides, so that the first convex buds can be used for interference fit with the groove of the upper shell or the lower shell when the bracket is finally installed into the upper shell or the lower shell, thereby preventing the bracket from swinging in the upper shell or the lower shell.

[0015] The first convex bristle is also provided with a one-way chamfer along the direction in which the bracket is installed into the upper shell or the lower shell.

[0016] In the upper housing, at a bending position corresponding to the lead-out portion of the coil lead-out pin, a guide angle is provided to prevent the upper housing from scratching the bent portion of the lead-out portion of the coil lead-out pin.

[0017] The top end of the bracket is also provided with a second convex burl for supporting the horizontal section of the lead-out portion of the coil lead-out pin.

[0018] The upper flange of the coil frame also extends outward to form a convex edge that fully or partially covers the horizontal section of the lead-out portion of the coil lead-out pin; the top end of the bracket is supported on the horizontal section and / or convex edge of the lead-out portion of the coil lead-out pin.

[0019] The convex edge of the coil frame covers a section of the horizontal section of the lead-out part of the coil lead-out pin away from the bending part; the second convex brim is provided with a step, the convex edge rests on the lower surface of the step of the second convex brim, and a section of the horizontal section of the lead-out part of the coil lead-out pin close to the bending part rests on the upper surface of the step of the second convex brim.

[0020] A convex portion is further provided on the side of the upper shell, corresponding to the outer side of the winding window of the coil frame, the guide rail is arranged in the convex portion, and the surrounding wall of the shell is arranged on the top end of the convex portion.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The present invention adopts a method that the lead-out portion of the coil lead-out pin is led upward from the middle position of the relay, and the lead-out portion of the coil lead-out pin includes a horizontal section led from the coil frame corresponding to the middle position of the relay and an upward lead-out section bent upward from the outer end of the horizontal section; the upper end of the upward lead-out section and the surrounding wall of the upper shell form a plug-in connector; the relay is also provided with a support portion, and the support portion is supported below the horizontal section of the lead-out portion of the coil lead-out pin. This structure of the present invention, on the one hand, makes the connection and screw fixing directions of the load end of the product and the connector and the mounting foot the same, and the client automation equipment only needs to set one direction for installation, which is beneficial to the human-machine interaction of the client automation equipment and thus facilitates the application of the product; on the other hand, it can improve the stability of the product connector plug-in and pull-out, thereby effectively preventing the disadvantage of product connection failure; it is led upward from the middle of the side, and the client automation manipulator only needs to probe into a small part of the head to assemble, shortening the manipulator's probe stroke, and there is no need to leave enough space between the relay and other parts for the manipulator to probe, thereby reducing the volume of the battery pack.

[0023] 2. The present invention adopts a support part as a separate part of the bracket, and the bracket is installed between the upper shell and the lower shell. This structure of the present invention sets the support part as a separate component, which will neither interfere with the coil winding nor affect the installation of the coil lead-out part.

[0024] 3. The present invention adopts a cross-shaped design for the cross section of the bracket, and grooves are provided in the upper shell or the lower shell at positions corresponding to the two opposite convex strips of the bracket to form the guide rail. In this structure of the present invention, the cross-shaped bracket can make the bracket structure more reliable, and the two opposite convex strips therein conveniently match with the guide rail, i.e., the groove, of the upper shell or the lower shell, so as to facilitate the bracket to be installed in the upper shell or the lower shell.

[0025] 4. The present invention adopts the method of providing first convex buds for interference fit on both sides of the lower section of the convex strip, and also providing a one-way chamfer in the first convex bud along the direction in which the bracket is installed into the upper shell or the lower shell. This structure of the present invention can prevent the bracket from swinging in the upper shell or the lower shell by utilizing the interference fit of the first convex bud with the groove of the upper shell or the lower shell at the end of the bracket being installed into the upper shell or the lower shell, and the straight edge section of the one-way chamfer in the first convex bud plays a role in preventing errors. If the bracket is installed in reverse, it cannot be installed into the upper shell, thus playing a role in preventing the bracket from being installed in the wrong way.

[0026] 5. The present invention adopts the upper housing, and at the bending position corresponding to the lead-out portion of the coil lead-out pin, a guide angle is also provided to prevent the lead-out pin from scratching the bent portion of the lead-out portion of the coil lead-out pin. With this structure of the present invention, when the size of the coil lead-out pin is out of tolerance, the bracket will lift the lead-out pin. At this time, the coil lead-out pin will have a certain amount of scratching with the upper housing. After the guide angle is set, the guide angle will compensate for a certain size contrast, thereby preventing the coil lead-out pin from scratching with the upper housing to produce plastic chips and affecting the performance of the relay.

[0027] 6. The present invention adopts a step provided on the second bulge, and uses the lower surface of the second bulge to support the convex edge of the upper flange of the coil frame, and uses the upper surface of the second bulge to support the coil lead pins, so that the support of the coil lead pins by the bracket is more effective and reliable.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the direct-acting DC relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the exploded three-dimensional structure of the first embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of the three-dimensional structure of the housing of the first embodiment of the present invention;

[0031] Figure 3 is a front view of a housing of the first embodiment of the present invention;

[0032] Figure 4 is a top view of the housing of the first embodiment of the present invention;

[0033] Figure 5 is a bottom view of the housing of the first embodiment of the present invention;

[0034] Figure 6 is a schematic diagram of the three-dimensional structure of the cover plate of the first embodiment of the present invention;

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the coil frame and the coil lead pins in the first embodiment of the present invention;

[0036] Figure 8 It is a front view of the coil frame and the coil lead pins in the first embodiment of the present invention;

[0037] Fig. 9 It is a schematic diagram of the three-dimensional structure of the coil frame and the yoke iron in the first embodiment of the present invention;

[0038] Fig.10 is a schematic diagram of the three-dimensional structure of the bracket according to the first embodiment of the present invention;

[0039] Fig.11 is a front view of a bracket according to a first embodiment of the present invention;

[0040] Fig.12 is a top view of the bracket of the first embodiment of the present invention;

[0041] Fig.13 is a bottom view of the bracket of the first embodiment of the present invention;

[0042] Fig.14 is a side view of the bracket of the first embodiment of the present invention;

[0043] Fig.15 is a schematic diagram of a three-dimensional structure of a bracket and a cover plate in cooperation with each other according to the first embodiment of the present invention;

[0044] Fig.16 It is a schematic diagram of a three-dimensional structure in which a bracket, a relay body and a cover plate cooperate with each other according to the first embodiment of the present invention;

[0045] Fig.17 This is a front view of the bracket, relay body and cover plate in the first embodiment of the present invention;

[0046] Fig.18 It is a schematic diagram of the exploded three-dimensional structure of the second embodiment of the present invention;

[0047] Fig.19 is a schematic diagram of the three-dimensional structure of the housing of the second embodiment of the present invention;

[0048] Fig. 20 It is a partial cross-sectional view of the support, relay body and cover plate of the second embodiment of the present invention;

[0049] Fig.21 yes Fig. 20 A magnified schematic diagram of part A in FIG.

[0050] Fig. 22 It is a schematic diagram of the three-dimensional structure of the coil frame and the coil lead pins in the second embodiment of the present invention;

[0051] Fig.23 is a schematic diagram of the three-dimensional structure of the bracket of the second embodiment of the present invention;

[0052] Fig.24 is a front view of a bracket according to a second embodiment of the present invention;

[0053] Fig.25 is a top view of a bracket according to a second embodiment of the present invention;

[0054] Fig.26 is a bottom view of the bracket of the second embodiment of the present invention;

[0055] Fig. 27 is a side view of a bracket according to a second embodiment of the present invention;

[0056] Fig.28 is a schematic diagram of a three-dimensional structure of a bracket and a cover plate in cooperation with each other according to a second embodiment of the present invention;

[0057] Fig.29 It is a schematic diagram of a three-dimensional structure in which a bracket, a relay body and a cover plate cooperate with each other in the second embodiment of the present invention;

[0058] Fig.30 This is a front view of the bracket, relay body and cover plate of the second embodiment of the present invention in coordination with each other;

[0059] Fig.31 It is a schematic diagram of the exploded three-dimensional structure of the third embodiment of the present invention;

[0060] Fig.32 is a schematic diagram of the three-dimensional structure of the third embodiment of the present invention;

[0061] Fig.33 It is a front view of the third embodiment of the present invention;

[0062] Fig.34 yes Fig.33 A magnified schematic diagram of part B in FIG.

[0063] Fig.35 is a schematic diagram of the three-dimensional structure of the lower housing of the third embodiment of the present invention;

[0064] Fig.36 is a front view of the lower housing of the third embodiment of the present invention;

[0065] Fig.37 It is a schematic diagram of the exploded three-dimensional structure of the fourth embodiment of the present invention;

[0066] Fig.38 is a schematic diagram of the three-dimensional structure of the fourth embodiment of the present invention;

[0067] Fig.39 is a front view of a fourth embodiment of the present invention;

[0068] Fig.40 yes Fig.39 The enlarged schematic diagram of the C part in FIG.

[0069] Fig.41 It is a schematic diagram of the three-dimensional structure of the lower shell of the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0070] Embodiment 1

[0071] See also Figures 1 to 17As shown, a direct-acting DC relay of the present invention comprises an upper housing 3, a lower housing 2, two static contact lead-out terminals 1 and a coil part; in this embodiment, the lower housing 2 is a cover plate, and the cover plate 2 is fixed to the bottom end of the upper housing 3. The periphery of the cover plate 2 and the bottom end of the upper housing 3 are respectively provided with mutually matching snap-fit ​​structures, and the cover plate 2 and the upper housing 3 are fixed to each other by the snap-fit ​​structure. The two static contact lead-out terminals 1, the coil part, the moving spring, the push rod component, the yoke 45, the iron core, etc. are assembled into a relay body 20. The relay The main body 20 is installed in the cavity surrounded by the upper shell 3 and the cover plate 2; the two static contact lead-out terminals 1 are adapted to the top of the upper shell 3; the coil part is installed in the middle and lower part of the cavity surrounded by the upper shell 3 and the cover plate 2; the coil part includes a coil frame 4 and a coil lead-out pin 5, the coil lead-out pin 5 is connected to the coil frame 4, and the lead-out part of the coil lead-out pin 5 extends from the side of the coil frame 4; in this embodiment, the projection of the upper shell 3 on the bottom surface is a rectangular shape, and the rectangular shape of the upper shell 3 is The side parallel to the line connecting the static contact lead-out terminals 1 is the long side, and the side perpendicular to the line connecting the two static contact lead-out terminals 1 is the short side. The lead-out portion of the coil lead-out pin 5 is led out from the coil frame 4, corresponding to the short side of the rectangular shape of the upper shell 3; the lead-out portion of the coil lead-out pin 5 includes a horizontal section 51 led out from the coil frame corresponding to the middle position of the relay and an upward lead-out section 52 bent upward from the outer end of the horizontal section; in this embodiment, the lead-out portion of the coil lead-out pin 5 is bent into an L-shaped shape, and the horizontal side of the lead-out portion is The side of the lead-out portion is a horizontal section 51, and the vertical side of the lead-out portion is an upward lead-out section. The end (i.e., the inner end) of the horizontal side 51 of the lead-out portion is connected to the coil frame 4, and the end 521 (i.e., the upper end) of the vertical side 52 and the surrounding wall 31 of the upper shell 3 form a plug-in connector 30; the relay is also provided with a support portion. In this embodiment, the support portion is a separate part formed by a bracket 6. The bracket 6 is installed between the upper shell 3 and the cover plate 2, and is supported under the horizontal side 51 of the lead-out portion of the coil lead-out pin 5. The coil lead-out pin 5 is composed of a lead-out portion, a winding portion, and a fixed portion, and the fixed portion is fixed in the coil frame by injection molding.

[0072] In this embodiment, the coil frame 4 includes an upper flange 41, a lower flange 41 and a winding window 43 between the upper and lower flanges; the end (i.e., the inner end) of the horizontal side 51 of the lead-out portion of the coil lead-out pin 5 is connected to the upper flange 41 of the coil frame, that is, the end of the horizontal side 51 of the lead-out portion of the coil lead-out pin 5 is fixed to the upper flange 41 of the coil frame 4 by injection molding.

[0073] In this embodiment, a guide rail 32 for guiding the bracket 6 is provided in the upper housing 3, and the two sides of the bracket 6 are respectively installed in the upper housing 3 along the guide rail 32 of the upper housing, and the top of the bracket 6 is against the horizontal side 51 of the lead-out portion of the coil lead-out pin; the cover plate 2 is provided with a slot 21, and the bottom end of the bracket 6 is matched in the slot 21 of the cover plate 2. When the bracket 6 is installed in the upper housing 3, it is installed in the upper housing 3 from the bottom to the top from the bottom of the upper housing. When installing the relay, the relay body 20 is first installed in the upper housing 3 from the bottom to the top, and then the bracket 6 is also installed in the upper housing 3 from the bottom to the top, and the bracket 6 supports the horizontal side 51 of the lead-out portion of the coil lead-out pin 5, and finally the cover plate 2 is installed in the bottom end of the upper housing.

[0074] In this embodiment, the end 521 of the vertical side 52 of the lead-out part of the coil lead-out pin 5 is a pin-type structure, and the plug-in connector 30 formed by the end 521 of the vertical side 52 of the lead-out part of the coil lead-out pin 5 and the surrounding wall 31 of the upper shell 3 is a pin-type plug-in connector.

[0075] In this embodiment, two opposite sides of the bracket 6 are respectively provided with vertical convex strips 61; in the upper shell 3, grooves are respectively provided at the positions corresponding to the two opposite convex strips of the bracket to form the guide rail 32, and the two convex strips 61 of the bracket 6 are respectively guided and fitted in the two grooves 32 (i.e., guide rails) of the upper shell, and the bracket 6 is prevented from swinging in the upper shell 3 by interference fit.

[0076] In this embodiment, the cross section of the bracket 6 is in a cross shape, and two opposite sides of the cross of the bracket 6 are the protruding strips 61 .

[0077] In this embodiment, first convex buds 62 for interference fit are respectively provided on both sides of the lower section of the convex strip 61, so that the first convex buds 62 can be used for interference fit with the groove 32 of the upper shell 3 when the bracket 6 is finally installed into the upper shell 3, thereby preventing the bracket 6 from swinging in the upper shell 3.

[0078] In this embodiment, a one-way chamfer 63 is further provided in the first convex burl 62 along the direction in which the bracket is installed into the upper housing 3 .

[0079] In this embodiment, the top of the bracket 6 is further provided with a second convex bulge 64 for supporting the horizontal side of the lead-out portion of the coil lead-out pin 5 , and two second convex bulges 64 are provided, respectively used to support two coil lead-out pins 5 .

[0080] In this embodiment, the upper flange 41 of the coil frame 4 is also extended outward to be provided with a convex edge 44 which is a section away from the bent portion and covers the horizontal side 51 of the lead-out portion of the coil lead-out pin 5, and a notch is provided on the yoke 45 to allow the convex edge 44 of the coil frame 4 to extend outward. In this embodiment, the convex edge 44 only partially covers the horizontal side 51 of the lead-out portion of the coil lead-out pin 5, and the bracket 6 does not support the convex edge 44. Of course, the convex edge 44 can also be completely covered by the horizontal side 51 of the lead-out portion of the coil lead-out pin 5. In this case, the bracket 6 supports the horizontal side 51 of the lead-out portion of the coil lead-out pin 5 by supporting the convex edge 44.

[0081] In this embodiment, a convex portion 34 is provided on the side of the shell 3 at the outer side of the winding window corresponding to the coil frame 4 , the guide rail 32 is provided in the convex portion 34 , and the surrounding wall 31 of the shell 3 is provided at the top end of the convex portion 34 .

[0082] A direct-acting DC relay of the present invention adopts a method of leading the lead-out portion of the coil lead-out pin upward from the middle position of the relay, that is, the lead-out portion of the coil lead-out pin 5 is bent into an L-shaped shape, and the lead-out portion includes a horizontal side 51 whose end is connected to the coil frame and a vertical side 52 of the end 521 and the surrounding wall 31 of the shell to form a plug-in connector 30; and the relay also includes a bracket 6, and the bracket 6 is fixed between the shell 3 and the cover plate 2, and supported below the horizontal side 51 of the lead-out portion of the coil lead-out pin 5. The structure of the present invention, on the one hand, makes the connection of the load end of the product and the connector, and the screw fixing direction of the mounting foot the same, and the customer automation equipment only needs to set one direction for installation, which is beneficial to the human-machine interaction of the customer automation equipment and thus convenient for the application of the product; on the other hand, it can improve the plugging and unplugging stability of the product connector, thereby effectively preventing the disadvantage of product connection failure; it is led upward from the middle of the side, and the customer automation manipulator only needs to probe into a small part of the head for assembly, shortening the manipulator's probe stroke, and there is no need to leave enough assembly space between the relay and other parts for the manipulator to probe into, thereby reducing the volume of the battery pack.

[0083] A direct-acting DC relay of the present invention adopts a separate part whose supporting part is a bracket 6, and the bracket 6 is installed between the upper housing 3 and the cover plate. In this structure of the present invention, the supporting part is set as a separate component, which will neither interfere with the coil winding nor affect the installation of the coil lead-out part.

[0084] A direct-acting DC relay of the present invention adopts a cross-shaped cross section of a bracket 6, and grooves 32 are respectively provided at positions corresponding to two opposite convex strips 61 of the bracket 6 in the upper housing 3 to form the guide rail, and a card slot 21 is provided in the cover plate 2 to cooperate with the bottom end of the bracket 6. In this structure of the present invention, the cross-shaped bracket 6 can make the structure of the bracket 6 more reliable, the bracket 6 cooperates with the cover plate to play a role in X and Y axial fixing, and the two opposite convex strips 61 therein conveniently cooperate with the guide rail, i.e., the groove 32, of the upper housing 3, so as to facilitate the bracket 6 to be installed in the upper housing 3, and the bracket 6 is fixed between the upper housing 3 and the cover plate 2 by using the cover plate 2.

[0085] A direct-acting DC relay of the present invention adopts a first convex 62 for interference fit provided on both sides of the lower section of the convex strip 61, and a one-way chamfer 63 is provided in the first convex 62 along the direction in which the bracket is installed into the upper housing. This structure of the present invention utilizes the interference fit between the first convex 62 and the groove 32 of the upper housing 3 at the end of the bracket 6 being installed into the upper housing 3, so as to prevent the bracket 6 from swinging in the upper housing 3, and the straight edge section of the one-way chamfer 63 in the first convex 62 plays a role in preventing errors. If the bracket is installed in reverse, it cannot be installed into the upper housing, so that the bracket can play a role in preventing errors in installation.

[0086] Embodiment 2

[0087] See also Figures 18 to 30 As shown, a direct-acting DC relay of the present invention is different from the first embodiment in that the lead-out portion of the coil lead-out pin 5 is a plug-in structure, the end 521 of the vertical side 52 is also a plug-in structure, and the plug-in connector 30 formed by the end 521 of the vertical side 52 of the lead-out portion of the coil lead-out pin 5 and the surrounding wall 31 of the housing 3 is a plug-in connector. In addition, the shape of the bracket 6 is also different, the second convex bulge 64 is provided with a step, the convex edge 44 of the upper flange 41 of the coil frame 4 is placed on the lower table 641 of the step of the second convex bulge 64, and a section of the horizontal side 51 of the lead-out portion of the coil lead-out pin 5 close to the bent portion is placed on the upper table 642 of the step of the second convex bulge 64.

[0088] In this embodiment, in the housing 3, at the bending position corresponding to the lead-out portion of the coil lead-out pin 5, a guide angle 33 is further provided to prevent the lead-out portion of the coil lead-out pin from being scratched by the bent portion. The guide angle 33 structure of this embodiment can also be correspondingly provided in the first embodiment.

[0089] A direct-acting DC relay of the present invention adopts a guide angle 33 for preventing the bending portion of the lead-out portion of the coil lead-out pin 5 from scratching at the bending position of the lead-out portion of the coil lead-out pin 5 in the housing 3. In this structure of the present invention, when the size of the coil lead-out pin is out of tolerance, the bracket 6 will lift the lead-out pin. At this time, the coil lead-out pin will scratch the housing to a certain extent. After the guide angle 33 is set, the guide angle 33 will compensate for a certain size contrast, thereby preventing the coil lead-out pin 5 from scratching plastic chips with the housing 3 and affecting the performance of the relay.

[0090] A direct-acting DC relay of the present invention adopts a method of providing a step on the second convex bulge 64, using the lower surface 641 of the second convex bulge to support the convex edge 44 of the upper flange 41 of the suspended coil frame, and using the upper surface 642 of the second convex bulge to support the coil lead-out pin 5, so that the support of the bracket 6 to the coil lead-out pin 5 is more effective and reliable.

[0091] Embodiment 3

[0092] See also Figure 31 to Figure 36 As shown, a direct-acting DC relay of the present invention is different from the first embodiment in that the lower housing 7 is also a shell-shaped structure, the upper housing 3 and the lower housing 7 are matched at a position corresponding to the middle of the relay, and a guide rail 71 (i.e., a groove) is provided in the lower housing 7 for guiding the bracket 6 to be installed, and the two sides of the bracket 6 are respectively installed in the lower housing 7 along the guide rail 71 of the lower housing 7, and the top end of the bracket 6 is against the horizontal section 51 of the lead-out part of the coil lead-out pin.

[0093] In this embodiment, the bracket 6 is mounted on the lower housing 7, so that the upper housing 3 does not need to be provided with a guide rail, but the guide rail used to install the bracket 6 is provided in the lower housing 7. In the relay of this structure, there is no guide rail in the convex part 34 of the housing 3, and a convex part 72 is provided in the lower housing 7, and the groove 71 of the lower housing 7 is provided in the convex part 72, and the convex part 34 of the upper housing 3 and the convex part 72 of the lower housing 7 are to correspond to each other.

[0094] When installing the relay, first install the bracket 6 into the lower housing 7 from top to bottom, then install the relay body 20 into the lower housing 7 from top to bottom, and make the bracket 6 support the horizontal side 51 of the lead-out part of the coil lead-out pin 5, and finally install the upper housing 3 on the top of the lower housing 7.

[0095] Embodiment 4

[0096] See also Figures 37 to 41As shown, a direct-acting DC relay of the present invention is different from the third embodiment in that the support portion 73 is integrally connected to the lower housing 7 by injection molding, and the support portion 73 is also arranged at the convex portion 72 of the lower housing 7. The support portion 73 is also configured to have two convex bud structures on one horizontal side of the lead-out portion of the coil lead-out pin 5, so as to support the two coil lead-out pins 5 respectively. A step is provided in the convex bud structure of the support portion 73, and the convex edge 44 of the upper flange 41 of the coil frame 4 rests on the lower table 731 of the step of the convex bud of the support portion 73, and a section of the horizontal side 51 of the lead-out portion of the coil lead-out pin 5 close to the bending portion rests on the upper table 7322 of the step of the convex bud of the support portion 73.

[0097] The direct-acting DC relay of the present invention adopts an integrated molding method to set the support part 73, which facilitates the assembly of the product. When installing the relay, the relay body 20 is directly installed into the lower housing 7 from top to bottom, and the support part 73 supports the horizontal side 51 of the lead-out part of the coil lead-out pin 5, and finally the upper housing 3 is installed on the top of the lower housing 7.

[0098] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A direct-acting DC relay, comprising an upper housing, a lower housing, two static contact lead-out terminals and a coil portion; the lower housing is fixed to the bottom of the upper housing; the two static contact lead-out terminals are adapted to the top of the upper housing; the coil portion is installed in the middle and lower part of the cavity surrounded by the upper housing and the lower housing; the coil portion comprises a coil frame and a coil lead-out pin, the coil lead-out pin is connected to the coil frame, and the lead-out portion of the coil lead-out pin extends from the side of the coil frame; characterized in that: The lead-out portion of the coil lead-out pin includes a horizontal section led out from the coil frame corresponding to the middle position of the relay and an upward lead-out section bent upward from the outer end of the horizontal section; the upper end of the upward lead-out section and the surrounding wall of the upper shell form a plug-in connector; the relay is also provided with a supporting portion, which is supported under the horizontal section of the lead-out portion of the coil lead-out pin; the coil frame includes an upper flange, a lower flange and a winding window between the upper and lower flanges; the inner end of the horizontal section of the lead-out portion of the coil lead-out pin is connected to the upper flange of the coil frame.

2. The direct-acting DC relay according to claim 1, characterized in that: The inner side end of the horizontal section of the lead-out portion of the coil lead-out pin is integrally connected to the upper flange of the coil frame by injection molding.

3. The direct-acting DC relay according to claim 1 or 2, characterized in that: The support portion is a separate part formed by a bracket, and the bracket is installed between the upper shell and the lower shell.

4. The direct-acting DC relay according to claim 1 or 2, characterized in that: The support portion is integrally connected to the lower housing by injection molding.

5. The direct-acting DC relay according to claim 4, characterized in that: The top of the support portion is also provided with a step.

6. The direct-acting DC relay according to claim 3, characterized in that: The upper shell and the lower shell match each other at the middle position corresponding to the relay. The lower shell is provided with a guide rail for guiding the bracket to be installed. The two sides of the bracket are respectively installed into the lower shell along the guide rail of the lower shell, and the top end of the bracket is against the horizontal section of the lead-out part of the coil lead-out pin.

7. The direct-acting DC relay according to claim 3, characterized in that: The upper shell and the lower shell match at a position corresponding to the bottom of the relay, and the lower shell is a cover plate; a guide rail for guiding the bracket to be installed in the upper shell is provided in the upper shell, and the two sides of the bracket are respectively installed in the upper shell along the guide rail of the upper shell, and the top of the bracket is against the horizontal section of the lead-out part of the coil lead-out pin; the cover plate is provided with a slot, and the bottom end of the bracket is matched in the slot of the cover plate.

8. The direct-acting DC relay according to claim 6 or 7, characterized in that: The bracket is provided with vertical convex strips on two opposite sides respectively; in the upper shell or the lower shell, grooves are provided at the positions corresponding to the two opposite convex strips of the bracket to form the guide rail, and the two convex strips of the bracket are respectively guided and fitted in the two grooves of the upper shell or the lower shell, and the bracket is prevented from swinging in the upper shell or the lower shell by interference fit.

9. The direct-acting DC relay according to claim 8, characterized in that: The cross section of the bracket is in a cross shape.

10. The direct-acting DC relay according to claim 8, characterized in that: The lower section of the convex strip is provided with first convex buds for interference fit on both sides, so that the first convex buds can be used for interference fit with the groove of the upper shell or the lower shell when the bracket is finally installed into the upper shell or the lower shell, thereby preventing the bracket from swinging in the upper shell or the lower shell.

11. The direct-acting DC relay according to claim 10, characterized in that: The first convex bristle is also provided with a one-way chamfer along the direction in which the bracket is installed into the upper shell or the lower shell.

12. The direct-acting DC relay according to claim 6 or 7, characterized in that: In the upper housing, at a bending position corresponding to the lead-out portion of the coil lead-out pin, a guide angle is provided to prevent the upper housing from scratching the bent portion of the lead-out portion of the coil lead-out pin.

13. The direct-acting DC relay according to claim 3, characterized in that: The top end of the bracket is also provided with a second convex burl for supporting the horizontal section of the lead-out portion of the coil lead-out pin.

14. The direct-acting DC relay according to claim 13, characterized in that: The upper flange of the coil frame also extends outward to form a convex edge that fully or partially covers the horizontal section of the lead-out portion of the coil lead-out pin; the top end of the bracket is supported on the horizontal section and / or convex edge of the lead-out portion of the coil lead-out pin.

15. The direct-acting DC relay according to claim 14, characterized in that: The convex edge of the coil frame covers a section of the horizontal section of the lead-out part of the coil lead-out pin away from the bending part; the second convex brim is provided with a step, the convex edge rests on the lower surface of the step of the second convex brim, and a section of the horizontal section of the lead-out part of the coil lead-out pin close to the bending part rests on the upper surface of the step of the second convex brim.

16. The direct-acting DC relay according to claim 7, characterized in that: A convex portion is further provided in the side of the upper shell, corresponding to the outer side of the winding window of the coil frame, the guide rail is arranged in the convex portion, and the surrounding wall of the shell is arranged at the top end of the convex portion.

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