Anti-falling electromagnetic relay
Technical Field
The invention relates to an electromagnetic relay, in particular to an electromagnetic relay with good positioning of an electromagnetic part and high drop resistance.
Background
The electromagnetic relay is an electromechanical component widely applied to an automobile electronic control module. Because of the rigor of the automobile using environment and the higher requirement for the safety performance, the relay applied in the automobile field is required to have higher shock resistance and vibration resistance and better anti-falling performance.
In the existing relay, an electromagnetic part is not accurately positioned in a shell, in order to compensate errors in an assembly process and ensure that a movable spring armature part has a reliable motion space in the shell, the design allowance of the limit space in the relay for the movable spring armature part is large, so that the moving distance of the movable spring armature part is large when the relay is subjected to strong impact vibration, the movable spring armature part exceeds the elastic deformation range of the movable spring to generate plastic deformation, and the function of the relay is damaged or even loses efficacy.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the anti-falling electromagnetic relay, through the structural design of the shell, the electromagnetic part and the base, the electromagnetic part can be accurately positioned in the shell, and the movable spring armature component can be accurately limited, so that the electromagnetic part of the electromagnetic relay can be well positioned and has high anti-falling performance.
The technical scheme adopted by the invention for solving the technical problems is as follows: a drop-resistant electromagnetic relay comprises a shell, an electromagnetic part and a base; the electromagnetic part is fixed with the base; the bottom of the shell is connected with the base and contains the electromagnetic part on the base in the shell cavity; the electromagnetic part consists of a magnetic circuit part, a normally open static spring part, a normally closed static spring part and a movable spring armature part; the magnetic circuit part consists of a coil rack, an iron core, an enameled wire, a lead-out pin and a yoke iron; the movable spring armature part consists of a movable spring, an armature and a movable contact; the inner side wall of the opening of the shell is provided with a binding surface which can be matched with the peripheral side surface of the base to form that the shell positions the electromagnetic part arranged on the base in the transverse direction and the longitudinal direction; a convex part abutting against the electromagnetic part is arranged in the shell and is pressed on the electromagnetic part from the vertical direction, so that the shell is formed to position the electromagnetic part in the vertical direction.
The convex part comprises a first convex rib which is arranged on the top wall of the shell cavity of the shell along the longitudinal direction, and the first convex rib is arranged at a position corresponding to the head part of the coil rack; the head of the coil rack is provided with a first boss; the bottom end of the first convex rib of the shell is propped against the top end of the first boss of the coil rack.
The convex part also comprises a second convex rib vertically arranged on the side wall of the shell cavity of the shell, and the second convex rib is arranged at a position corresponding to the tail part of the coil rack; the second convex rib is provided with a step and leads the step to face downwards; the step surface of the second convex rib of the shell is propped against the top end of the tail part of the coil rack.
The two second convex ribs are respectively and symmetrically arranged on two side walls of the shell cavity of the shell by taking the transverse central line as a symmetry axis.
A first limiting surface perpendicular to the longitudinal direction is further arranged below the step of the second convex rib, and the first limiting surface of the second convex rib is matched with the side surface of the tail of the coil rack so as to prevent the electromagnetic part from inclining in the shell along the longitudinal direction.
The tail end of the first limiting surface of the second convex rib is also provided with an inclined surface which is convenient for the electromagnetic part to be arranged in the shell.
The inner side wall of the opening of the shell is also provided with a step which is pressed on the base from the vertical direction to form the shell for positioning the electromagnetic part arranged on the base in the vertical direction.
A drop-resistant electromagnetic relay comprises a shell, an electromagnetic part and a base; the electromagnetic part is fixed with the base; the bottom of the shell is connected with the base and contains the electromagnetic part on the base in the shell cavity; the electromagnetic part consists of a magnetic circuit part, a normally open static spring part, a normally closed static spring part and a movable spring armature part; the magnetic circuit part consists of a coil rack, an iron core, an enameled wire, a lead-out pin and a yoke iron; the movable spring armature part consists of a movable spring, an armature and a movable contact; the inner wall of the shell is provided with a convex part which has a preset distance with the moving spring armature part, and the convex part limits the moving distance of the moving spring armature part along the vertical direction and the horizontal direction; the head of the coil frame is provided with a first boss which has a preset distance with the moving spring armature part, and the first boss limits the moving distance of the moving spring armature part along the longitudinal direction and the transverse direction.
The convex part comprises a convex block arranged in the middle of the top wall of the shell cavity of the shell, and the convex block is arranged at a position corresponding to the middle of the movable spring armature part; the bottom end of the bump of the shell is matched with the middle part of the moving spring armature part to limit the upward moving distance of the moving spring armature part along the vertical direction.
The convex part also comprises a third convex rib arranged on the top wall of the shell cavity of the shell, and the third convex rib is arranged at a position corresponding to the tail part of the armature of the moving spring armature part; the bottom end of the third convex rib of the shell is matched with the tail part of the armature of the movable spring armature part, and the upward moving distance of the movable spring armature part along the vertical direction is limited.
The convex part also comprises a fourth convex rib vertically arranged on the side wall of the shell cavity of the shell, and the fourth convex rib is arranged at a position corresponding to the tail part of the armature of the moving spring armature part; and the fourth convex rib of the shell is matched with the side surface of the tail part of the armature of the moving spring armature part to limit the moving distance of the moving spring armature part in the transverse direction.
A second limiting surface which is vertical to the transverse direction is arranged on the side edge of the first boss of the head of the coil rack, and the second limiting surface is arranged at a position corresponding to the head of the armature of the moving spring armature part; the head of the armature of the moving spring armature part is provided with a shoulder; the second limit surface of the coil frame is matched with the shoulder of the head part of the armature of the movable spring armature part to limit the moving distance of the movable spring armature part in the transverse direction.
The first boss of the head of the coil rack is provided with a third limiting surface which is arranged at a position corresponding to the head of the armature of the moving spring armature part; the head of the armature of the moving spring armature part is provided with an inclined side surface; the third limiting surface of the coil frame is matched with the inclined side surface of the head part of the armature of the movable spring armature part to limit the moving distance of the movable spring armature part in the longitudinal direction.
The invention relates to a drop-resistant electromagnetic relay, which is characterized in that a convex part is arranged in a shell, and the electromagnetic part is accurately positioned in the shell through the matching of the convex part and a coil rack and the matching of the shell and a base. The anti-falling electromagnetic relay is characterized in that the shell is also provided with convex parts at other positions, and the moving distance of the movable spring armature part in the shell is accurately limited through the matching of the convex parts and the movable spring armature part and the matching of the coil rack and the movable spring armature part.
The invention has the advantages that as the inner side wall of the opening part of the shell is provided with the binding surface which can be matched with the peripheral side surface of the base, the shell is formed to position the electromagnetic part arranged on the base in the transverse direction and the longitudinal direction; the positioning structure can eliminate the defect that the electromagnetic part of the relay in the prior art is inaccurately positioned in the shell, so that the electromagnetic part of the electromagnetic relay can be well positioned. The inner wall of the shell is provided with a convex part with a preset distance from the moving spring armature part, the moving distance of the moving spring armature part along the vertical direction and the horizontal direction is limited by the convex part, and the head of the coil frame is provided with a first boss with a preset distance from the moving spring armature part, so that the moving distance of the moving spring armature part along the vertical direction and the horizontal direction is limited by the first boss; the limit structure can eliminate the defect of poor anti-falling performance of the electromagnetic part of the relay in the prior art, so that the anti-falling performance of the electromagnetic relay is improved.
The invention is further explained in detail with the accompanying drawings and the embodiments; a drop-resistant electromagnetic relay of the present invention is not limited to the embodiments.
Drawings
FIG. 1 is an exploded schematic view of the construction of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
fig. 3 is a schematic structural view of a magnetic circuit portion of the present invention;
FIG. 4 is a schematic structural view of the moving spring armature portion of the present invention;
FIG. 5 is a schematic structural view of the housing of the present invention;
fig. 6 is a schematic view of the structure of the housing of the present invention (turned over in one direction).
Detailed Description
In the embodiment, referring to the drawings, a coordinate system (as shown in fig. 1) is set, the transverse direction is the X axis, the direction of the X axis is directed from the head of the coil rack to the tail, the longitudinal direction is the Y axis, the direction of the Y axis forms an angle of 90 degrees with the direction of the X axis, the vertical direction is the Z axis, and the direction of the Z axis is upward.
The invention relates to a drop-resistant electromagnetic relay, which comprises a shell 1, an electromagnetic part 2 and a base 3; the electromagnetic part 2 is fixed with the base 3; the bottom of the shell 1 is connected with a base 3 and contains an electromagnetic part 2 positioned on the base in a shell cavity, and only the leading-out pin of the electromagnetic part 2 is positioned outside the shell cavity; the electromagnetic part 2 consists of a magnetic circuit part 24, a normally open static spring part 23, a normally closed static spring part 22 and a movable spring armature part 21; the magnetic circuit part 24 is composed of a coil rack 241, an iron core 242, an enameled wire 243, a lead-out pin 244 and a yoke 245; the movable spring armature part 21 consists of a movable spring 211, an armature 212 and a movable contact 213; the inner side wall of the opening part of the shell 1 is provided with a binding surface which can be matched with the peripheral side surface of the base, the shell 1 is formed to position the electromagnetic part 2 arranged on the base 3 in the transverse direction and the longitudinal direction, the opening part of the shell 1 is generally rectangular, so that two binding surfaces 17 vertical to an X axis and two binding surfaces 11 vertical to a Y axis exist, the periphery of the base 3 is provided with two opposite side surfaces 31 and two opposite side surfaces 32, the binding surface 11 of the opening part of the shell 1 is matched with the side surfaces 31 of the base 3 to position the electromagnetic part 2 in the Y axis direction in the shell 1, the binding surface 17 of the opening part of the shell 1 is matched with the side surfaces 32 of the base 3 to position the electromagnetic part 2 in the X axis direction in the shell 1.
A convex part abutting against the electromagnetic part 2 is arranged in the shell 1, the convex part is pressed on the electromagnetic part 2 from the vertical direction, and the shell 1 is formed to position the electromagnetic part 2 in the vertical direction.
Wherein,
the convex part comprises a first convex rib 13 which is arranged on the top wall of the shell cavity of the shell along the longitudinal direction, and the first convex rib 13 is arranged at the position corresponding to the head part of the coil rack 241; the head of the coil rack 241 is provided with a first boss 2415; the bottom end of the first convex rib 13 of the shell is propped against the top end of the first boss 2415 of the coil rack;
the convex part also comprises a second convex rib 12 vertically arranged on the side wall of the shell cavity of the shell, and the second convex rib 12 is arranged at a position corresponding to the tail part of the coil rack 241; the second rib 12 has a step with a step surface 121 facing downward; the step surface 121 of the second convex rib of the shell abuts against the top end 2411 of the tail part of the coil rack 241;
the number of the second convex ribs 12 is two, and the two second convex ribs 12 are respectively and symmetrically arranged on two side walls of the shell cavity of the shell 1 by taking the transverse central line as a symmetric axis;
a first limiting surface 122 perpendicular to the longitudinal direction is further arranged below the step of the second convex rib 12, and the first limiting surface 122 of the second convex rib is matched with a side surface 2412 at the tail part of the coil rack so as to prevent the electromagnetic part 2 from inclining along the longitudinal direction in the shell 1;
the end of the first limiting surface of the second rib 12 is further provided with an inclined surface 123 for facilitating the electromagnetic part to be installed in the housing.
Thus, the housing 1 has three positions in total for the bobbin 241, the three positions are distributed around the center of symmetry of the housing 1, and a stable and accurate positioning structure is formed for the electromagnetic part 2 in the + Z-axis direction. The first limiting surface 122 of the second rib 12 of the housing 1 limits the side 2412 of the tail of the coil frame, and prevents the head of the electromagnetic part 2 from inclining along the Y-axis direction inside the housing 1. The second rib 12 on the inner side of the housing has a slope 123 to ensure that the electromagnetic part 2 is smoothly installed in the housing 1.
A step 18 is also arranged at the inner side wall of the opening part of the shell, and the step 18 is pressed on the base 3 from the vertical direction to form the shell 1 for positioning the electromagnetic part arranged on the base 3 in the vertical direction.
The electromagnetic part 2 is precisely positioned in three axial directions inside the housing 1. The limit of the moving spring armature portion 21 is to be achieved.
A convex part with a preset distance from the movable spring armature part 21 is arranged on the inner wall of the shell 1, and the convex part limits the moving distance of the movable spring armature part 21 along the vertical direction and the transverse direction; a first boss 2415 having a preset distance from the moving spring armature portion is provided at the head of the bobbin 241, and the first boss 2415 limits the moving distance of the moving spring armature portion 21 in the longitudinal and transverse directions.
Wherein,
the convex part comprises a lug 14 arranged in the middle of the top wall of the shell cavity of the shell 1, and the lug 14 is arranged at a position corresponding to the middle of the movable spring 211 of the movable spring armature part 21; the bottom end of the projection 14 of the housing is matched with the middle part 2111 of the movable spring 211 of the movable spring armature part to limit the upward movement distance (namely + Z-axis direction) of the movable spring armature part 21 along the vertical direction;
the convex part also comprises a third convex rib 15 arranged on the top wall of the shell cavity of the shell 1, and the third convex rib 15 is arranged at a position corresponding to the tail part of the armature 212 of the moving spring armature part; the bottom end of the third convex rib 15 of the shell is matched with the tail part 2123 of the armature of the moving spring armature part to limit the moving distance of the moving spring armature part along the vertical direction upwards (namely the direction of the + Z axis); two third ribs 15 are provided;
the convex part also comprises a fourth convex rib 16 vertically arranged on the side wall of the shell cavity of the shell, and the fourth convex rib 16 is arranged at a position corresponding to the tail part of the armature 212 of the moving spring armature part; the fourth rib 16 of the housing is matched with the side surface of the tail 2123 of the armature of the moving spring armature part to limit the moving distance of the moving spring armature part 21 in the transverse direction (namely the direction of the + X axis);
a second limit surface 2413 which is perpendicular to the transverse direction is arranged on the side edge of the first boss 2415 at the head part of the coil rack, and the second limit surface 2413 is arranged at a position corresponding to the head part of the armature 212 of the moving spring armature part; the head of the armature of the moving spring armature part is provided with a shoulder 2121; the second limit surface 2413 of the bobbin cooperates with the shoulder 2121 of the head of the armature of the moving spring armature portion to limit the moving distance of the moving spring armature portion 21 in the lateral direction (i.e., the-X-axis direction);
the first boss of the head part of the coil rack is provided with a third limit surface 2414, and the third limit surface 2414 is arranged at a position corresponding to the head part of the armature 212 of the moving spring armature part; the head of the armature of the moving spring armature part is provided with an inclined side surface 2122; the third limit surface 2414 of the bobbin cooperates with the inclined side surface 2122 of the head of the armature of the moving spring armature portion to limit the moving distance of the moving spring armature portion in the longitudinal direction.
The moving distance of the moving spring armature component 21 is limited within the elastic deformation range of the moving spring 211 by the limit in each direction, after the impact vibration disappears, the moving spring 211 is restored to the initial state, the relay reaction force is not changed, and the relay function is normal.
The above embodiments are only used to further illustrate the anti-drop electromagnetic relay 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.