CN112509868A

CN112509868A - Electromagnetic relay with clamping structure

Info

Publication number: CN112509868A
Application number: CN202011180992.2A
Authority: CN
Inventors: 傅飞飞; 朱艺青; 刘金枪
Original assignee: Xiamen Hongfa Electroacoustic Co Ltd
Current assignee: Xiamen Hongfa Electroacoustic Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-03-16

Abstract

The invention discloses an electromagnetic relay with a clamping structure, which comprises a relay body, wherein the bottom of the relay body is provided with a plurality of lead-out pins which can be attached to a PCB (printed circuit board) or a substrate on the surface; the bottom of the relay body is provided with a plurality of buckles, and each buckle is respectively used for being clamped on the PCB or the substrate. Before the surface mounting of each lead-out pin, the invention can utilize each buckle to be clamped on a PCB or a substrate in advance to achieve the pre-positioning effect, thereby ensuring that the welding of the lead-out pin is good without the situation of tilting, sliding and the like of the relay in the subsequent surface mounting process, and simultaneously, the welding part of each lead-out pin is not easy to be damaged when the relay is subjected to the external force under the positioning of each buckle.

Description

Electromagnetic relay with clamping structure

Technical Field

The invention relates to the field of relays, in particular to an electromagnetic relay with a clamping structure.

Background

The SMD surface mount type product is generally small in size and directly mounted on a PCB (printed circuit board) or other substrates without an additional fixing mechanism. For larger relays, the size and the weight of the relays are larger, and the relays may be inclined, slide and the like in the surface mounting process, so that pins of the relays deviate from the designated positions, and the problems of poor welding, no welding, easy damage to welding parts due to external force after welding and the like are easily caused. With the increasing current specification of the relay, the volume and the weight of the relay are also increased, and even if the mounting welding is good, the relay is fixed only by welding points, so that the welding points are easy to damage or destroy due to the action of external force.

Disclosure of Invention

The invention provides an electromagnetic relay with a clamping structure, aiming at the technical problems in the prior art, wherein the electromagnetic relay can be clamped on a PCB or a substrate in advance, so that the situations of tilting, sliding and the like of the relay in the surface mounting process are prevented.

The technical scheme adopted by the invention for solving the technical problems is as follows: an electromagnetic relay with a clamping structure comprises a relay body, wherein the bottom of the relay body is provided with a plurality of leading-out pins which can be attached to a PCB or a substrate on the surface; the bottom of the relay body is provided with a plurality of buckles, and each buckle is respectively used for being clamped on the PCB or the substrate.

Furthermore, the relay body is provided with two notch grooves adjacent to the buckles at the positions where the buckles are located, and the buckles are located between the two corresponding notch grooves.

Further, each buckle includes dop and downwardly extending's card arm respectively, and the card arm root is fixed in the relay body, the dop set up in card arm afterbody one side.

Furthermore, a plurality of buckles divide into at least one group, and each group includes at least two buckles, and the dop of these at least two buckles is in opposite directions or back of the body mutually.

Furthermore, one side of the clamping head, which is far away from the clamping arm, is provided with a guide inclined plane or a chamfer angle.

Furthermore, a plurality of supporting legs are arranged at the bottom of the relay body, and the bottom ends of the supporting legs are respectively flush with the mounting surfaces of the leading-out legs.

Furthermore, the relay body comprises a base and a shell with an opening at the bottom end, and the bottom end of the shell is connected with the base; the plurality of leading-out pins respectively downwards penetrate through holes correspondingly arranged on the base, or the plurality of leading-out pins are respectively arranged on the base; the buckle is arranged on the shell or the base.

Furthermore, the relay body comprises a base and a shell with an opening at the bottom end, and the bottom end of the shell is connected with the base; the plurality of leading-out pins respectively downwards penetrate through holes correspondingly arranged on the base, or the plurality of leading-out pins are respectively arranged on the base; the buckle sets up in shell or base, the supporting legs sets up in shell or base.

Further, the base is connected with the shell in a buckling mode.

Furthermore, the plurality of leading-out pins are respectively bent into an L shape, and the bottom surface of one horizontal side of the leading-out pins forms a mounting surface of the leading-out pins.

Compared with the prior art, the invention has the following beneficial effects:

1. the bottom of the relay body is provided with the plurality of buckles, and the buckles are respectively used for being clamped on the PCB or the substrate, so that the leading-out pins of the invention can be pre-clamped on the PCB or the substrate by utilizing the buckles before surface mounting, the pre-positioning effect is achieved, the relay can not tilt or slide in the subsequent surface mounting process, the leading-out pins are ensured to be well welded, and meanwhile, the welding parts of the leading-out pins of the relay are not easy to be damaged when the relay is subjected to external force under the positioning of the buckles.

2. The notch groove can increase the flexibility of the buckle, so that the buckle is easier to deform in the clamping process.

3. The bottom of the relay body is provided with a plurality of supporting legs, the bottom ends of the supporting legs are respectively flushed with the mounting surfaces of the leading-out legs, so that the supporting legs can be respectively contacted with a PCB or a substrate to support the whole relay, and the problem that the leading-out legs are easy to deform when being subjected to external force due to the fact that only the leading-out legs of the conventional relay are contacted with the PCB or the substrate is solved.

3. The plurality of leading-out pins are respectively bent into an L shape, and the bottom surface of one horizontal side of each leading-out pin forms a mounting surface of the leading-out pin, so that the mounting surface of each leading-out pin is larger in area, and the welding effect is better.

The invention is further explained in detail with the accompanying drawings and the embodiments; however, the electromagnetic relay with a snap-fit structure of the present invention is not limited to the embodiment.

Drawings

FIG. 1 is a first perspective view of the present invention;

FIG. 2 is a schematic perspective view of the present invention (base up);

FIG. 3 is a schematic perspective view of the housing of the present invention (with the bottom end of the housing open upward);

FIG. 4 is a front view of the housing of the present invention (with the bottom end of the housing open upward);

FIG. 5 is a right side view of the housing of the present invention (with the bottom end of the housing open upward);

FIG. 6 is a schematic perspective view of the present invention in a state of being engaged with a PCB;

fig. 7 is a front view of the present invention in a mated state with a PCB board.

Detailed Description

In an embodiment, referring to fig. 1 to 7, an electromagnetic relay with a clamping structure according to the present invention includes a relay body, a magnetic circuit portion (not shown) and a contact portion (not shown) in the relay body, wherein the bottom of the relay body has a plurality of pins 3 that can be surface mounted on a PCB or a substrate; the bottom of the relay body is provided with a plurality of buckles 11, and each buckle 11 is respectively used for being clamped on the PCB or the substrate. The substrate refers to various boards except a PCB board and capable of being surface-mounted with the electromagnetic relay.

In the embodiment, the relay body comprises a base 2 and a shell 1 with an opening at the bottom end, and the bottom end of the shell 1 is connected with the base 2; the plurality of lead-out pins 3 are respectively lead-out pins of the magnetic circuit part or lead-out pins of the contact part, and each lead-out pin respectively passes through a through hole correspondingly arranged on the base 2 downwards, but not limited to the above, in other embodiments, each lead-out pin is respectively arranged on the base, and specifically, each lead-out pin is respectively fixed on the base in an insert injection molding mode or a plug-in mode or other fixing modes. The buckle 11 is disposed on the housing 1, but not limited thereto, and in other embodiments, the buckle is disposed on the base.

In this embodiment, as shown in fig. 3 to 5, each of the clips 11 includes a clip head 112 and a clip arm 111 extending downward, a root of the clip arm 111 is fixed to a bottom of a side wall of the housing 1, the clip head 112 is disposed at a side of a tail portion of the clip arm 111, and a guiding inclined surface 1121 (or a chamfer angle) is disposed at a side of the clip head 112 away from the clip arm 111, so that when the clip 11 is clipped, the clip head 112 can more conveniently enter a reserved hole corresponding to the PCB board or the substrate. The plurality of buckles 11 are divided into at least one group, each group comprises at least two buckles 11, and the clamping heads 112 of the at least two buckles 11 face or are opposite to each other. Specifically, a plurality of buckles 11 divide into a set, and this set includes two buckles 11, and these two buckles 11 are located the relative both sides wall bottom of shell 1 respectively to relative setting, and dop 112 of these two buckles 11 back on the other hand.

In this embodiment, the housing 1 of the relay body is provided with two notched grooves 14 adjacent to the latches 11 at positions where the latches 11 are located, and the latches 11 are located between the two corresponding notched grooves 14. The shape of the notch groove 14 is U-shaped, but is not limited thereto, and in other embodiments, the shape of the notch groove is semicircular, C-shaped, or the like. The term "adjacent" means that the clip 11 borders the corresponding notch groove 14, and specifically, one side surface of the clip arm 111 of the clip 11 is coplanar with one side surface of the notch groove 14. Therefore, the flexibility of each buckle 11 can be increased, and the buckles 11 are easier to deform in the clamping process.

In this embodiment, the bottom of the relay body is provided with a plurality of supporting legs 21, and the bottom end of each supporting leg 21 is flush with the mounting surface of the leading-out pin 3. Specifically, the supporting legs 21 are respectively disposed on the base 2 of the relay body, but not limited thereto, and in other embodiments, the supporting legs 21 are respectively disposed on the bottom of the side wall of the housing. The number of the supporting legs 21 is specifically four, two of the supporting legs are located at two corners opposite to the bottom end of the base 2, and the rest two supporting legs are located at two opposite sides of the bottom end of the base 2 and avoid the leading-out legs 3.

In this embodiment, the base 2 is connected to the housing 1 by a snap fit. Specifically, the base 2 is provided with a plurality of upward extending buckles 22, and the structure of the buckles 22 is basically the same as that of the buckle 11; the lateral wall bottom of shell 1 is equipped with a plurality of card holes 12, and buckle 11 and the cooperation of card hole 12 joint one by one. The bottom of the side wall of the shell 1 is also provided with a plurality of positioning lugs 13, and the positioning lugs 13 are matched with a plurality of positioning grooves arranged on the base 2 one by one.

In this embodiment, the plurality of lead-out pins 3 are respectively bent into an L shape, and the bottom surface of one horizontal side thereof forms the mounting surface of the lead-out pin 3, so that the mounting surface of each lead-out pin 3 has a larger area and better welding effect. The plurality of leading-out pins 3 specifically include two coil leading-out pins, a movable spring leading-out pin and a static spring leading-out pin, the two coil leading-out pins are respectively located at two sides where the rest two supporting legs 21 are located, and the movable spring leading-out pin and the static spring leading-out pin are located on the same side of the bottom end of the base 2.

In the electromagnetic relay with the clamping structure, the two buckles 11 form the clamping structure, and before surface mounting, the buckles 11 are respectively clamped in the preformed holes on the PCB 4 (or the substrate) as shown in fig. 6 and 7. Specifically, the chuck 112 of the buckle 11 enters the corresponding preformed hole on the PCB 4 under the guidance of the guiding inclined surface 1121 (or chamfer angle) of the chuck, the clamping arm 111 deforms inward, and after the chuck 112 passes through the corresponding preformed hole on the PCB 4, the clamping arm 111 recovers deformation, so that the chuck 112 clamps the bottom surface of the PCB 4, thereby realizing the pre-positioning of the relay, and preventing the relay from deviating from the preset position in the welding process, damaging the welding part in the installation process, and the like. Each supporting leg 21 contacts with PCB board 4 respectively, further plays the supporting role to whole relay, avoids leading out pin 3 and easily warp when receiving the exogenic action.

The parts (the magnetic circuit part, the specific structure of the contact part and the like of the relay) which are not involved in the electromagnetic relay with the clamping structure are the same as or can be realized by adopting the prior art.

The above embodiments are only used to further illustrate the electromagnetic relay with a clamping structure of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic relay with a clamping structure comprises a relay body, wherein the bottom of the relay body is provided with a plurality of leading-out pins which can be attached to a PCB or a substrate on the surface; the method is characterized in that: the bottom of the relay body is provided with a plurality of buckles, and each buckle is respectively used for being clamped on the PCB or the substrate.

2. An electromagnetic relay with a card structure according to claim 1, characterized in that: the relay body is provided with two notch grooves adjacent to the buckles at the positions where the buckles are located respectively, and the buckles are located between the two corresponding notch grooves respectively.

3. The electromagnetic relay with the snap-in structure according to claim 1 or 2, characterized in that: each buckle includes dop and downwardly extending's card arm respectively, and the card arm root is fixed in the relay body, the dop set up in card arm afterbody one side.

4. An electromagnetic relay with a card structure according to claim 3, characterized in that: the plurality of buckles are divided into at least one group, each group comprises at least two buckles, and the clamping heads of the at least two buckles face to each other or back to each other.

5. An electromagnetic relay with a card structure according to claim 3, characterized in that: and one side of the clamping head, which is far away from the clamping arm, is provided with a guide inclined plane or a chamfer angle.

6. An electromagnetic relay with a card structure according to claim 1, characterized in that: the bottom of the relay body is provided with a plurality of supporting legs, and the bottom ends of the supporting legs are respectively flush with the mounting surfaces of the leading-out legs.

7. An electromagnetic relay with a card structure according to claim 1, characterized in that: the relay body comprises a base and a shell with an opening at the bottom end, and the bottom end of the shell is connected with the base; the plurality of leading-out pins respectively downwards penetrate through holes correspondingly arranged on the base, or the plurality of leading-out pins are respectively arranged on the base; the buckle is arranged on the shell or the base.

8. An electromagnetic relay with a card structure according to claim 6, characterized in that: the relay body comprises a base and a shell with an opening at the bottom end, and the bottom end of the shell is connected with the base; the plurality of leading-out pins respectively downwards penetrate through holes correspondingly arranged on the base, or the plurality of leading-out pins are respectively arranged on the base; the buckle sets up in shell or base, the supporting legs sets up in shell or base.

9. The electromagnetic relay with the snap-in structure according to claim 7 or 8, characterized in that: the base is connected with the shell in a buckling mode.

10. An electromagnetic relay with a card structure according to claim 1, characterized in that: the plurality of leading-out pins are respectively bent into an L shape, and the bottom surface of one horizontal side of each leading-out pin forms a mounting surface of the leading-out pin.