A subminiature relay

Abstract

The application discloses a super-small relay, which comprises a base part; the base part comprises a coil, a static spring reed, coil terminals and a first plastic body which is used to integrate the coil, the static spring reed and the coil terminals into an integral part by injection molding; a boss is arranged between the coil leading-out terminal and the static contact part of the static spring reed, between the coil leading-out terminal and the reed leading-out terminal and between two adjacent reed leading-out terminals on the side surface of the first plastic body, so as to increase the insulation distance between the coil leading-out terminal and the static contact part and between the adjacent leading-out terminals. The application can further increase the insulation distance between the adjacent leading-out terminals on the same side surface of the base and the insulation distance between the coil leading-out terminal and the static contact part while ensuring that the relay is small in size and low in height to save installation space, and can avoid the pollution of the internal contact part when the product is sealed by point gluing, so as to reduce the assembly process difficulty and ensure the reliability of the product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, in particular to a super-small relay. BACKGROUND

[0002] The super-small electromagnetic relay is widely used in network communication, medical equipment, test equipment, security and protection, etc. due to its small size, low coil power consumption, double-pole double-throw contact output capability and good reliability. Figures 1 to 4As shown, the ultra-small relay is generally composed of a moving spring armature part 100, a base part 200 and a shell 300. The moving spring armature part 100 is formed integrally by combining injection molding of an armature 101, a permanent magnet and a moving spring part 103 containing a moving contact 102, the moving spring part 103 is usually symmetrically distributed around the armature 101, the moving contact 102 is located at the end of the moving spring, and is arranged opposite to a static contact 501 on the base. The base part 200 is usually formed by combining injection molding of a coil part 400 and a static spring part 500 containing a static contact 501, the static contact 501 is usually located at the upper part of the base. The moving spring armature part 100 is supported and positioned at the approximate center of the length of the base part in the up-down direction, and is formed integrally by welding the hinge part 104 at the middle of the moving spring to the welding platform position of the static spring on the base part 200, and then the electromagnetic relay is formed after the shell 300 is assembled. The moving structure of the moving spring armature part is usually located at the upper part of the base near the top of the shell. The coil lead terminals (control terminals) 401 and the spring lead terminals (output terminals) 502 of the base part 200 are distributed along the length direction of the base on both sides of the base and extend to the lower part of the base, and the coil lead terminals (control terminals) 401 and the spring lead terminals (output terminals) 502 on both sides are basically symmetrically distributed in the width direction (Z direction) of the relay. In order to isolate the external environment pollution, such ultra-small relays are mostly sealed, and the four perimeters of the lower part of the base, the lead terminals and the shell are sealed by epoxy glue. When the coil of the relay is powered on and off, the moving spring armature part 100 forms a rotating support point with the support part of the base part 200, so that the armature drives the moving spring to swing back and forth during the swinging process, so that the circuit of the spring part is turned on and off. The existing ultra-small relay mainly has the following problems: first, the distance between the lead terminals on the same side of the base (including the distance between the coil lead terminals 401 and the spring lead terminals 502, and the distance between adjacent spring lead terminals 502) is insufficient due to the small size of the product, and the insulation capacity between the terminals in the X axis direction is insufficient; second, when the epoxy glue is applied to the four perimeters of the lower part of the base, the epoxy glue easily leaks to the upper part of the base along the side of the base, polluting the contact part on the base and the hinge welding platform part of the moving spring, resulting in functional failure, so the flowability and viscosity of the glue during production process are difficult to control, resulting in complex production and poor quality; third, the coil winding head 402 of the coil part 400 is located on both sides of the width direction of the coil, in order to ensure the length of the coil winding head 402 to ensure reliable winding, therefore the width size (Z direction) of the relay is restricted from being further reduced, and since the coil winding head 402 is located between the coil lead terminals 401 and the spring lead terminals 502 in the X direction, if it cannot be reliably covered by the base plastic, it will further reduce the insulation distance between the coil lead terminals and the spring lead terminals in the X direction. SUMMARY

[0003] The present application aims at overcoming the deficiencies of the prior art, and provides an ultra-small relay, which can further increase the insulation distance between the adjacent lead terminals on the same side of the base and the insulation distance between the coil lead terminal and the static contact, while ensuring the small size and low height of the relay to save the installation space, and can avoid the pollution of the internal contact part during the product sealing by point gluing, so as to reduce the assembly process difficulty and ensure the reliability of the product.

[0004] The technical scheme adopted by the present application to solve the technical problems is as follows: an ultra-small relay, comprising a base part; the base part comprises a coil, a static spring reed, a coil terminal, and a first plastic body which collects the coil, the static spring reed, and the coil terminal into an integral part by injection molding; the static spring reed comprises a static contact part and a reed lead terminal; the coil terminal comprises a coil lead terminal; among the two side faces of the first plastic body along the length direction, one coil terminal and at least two static spring reeds are respectively distributed; the static contact part of the static spring reed is exposed on the top face of the first plastic body, the reed lead terminal of the static spring reed is exposed on the side face of the first plastic body and extends downward out of the bottom face of the first plastic body; the coil lead terminal is also exposed on the side face of the first plastic body and extends downward out of the bottom face of the first plastic body; among the side faces of the first plastic body, a boss is arranged between the coil lead terminal and the reed lead terminal and between the adjacent two reed lead terminals, so as to increase the insulation distance between the coil lead terminal and the reed lead terminal and between the adjacent reed lead terminals.

[0005] A boss is further arranged between the coil lead terminal and the static contact part of the static spring reed among the side faces of the first plastic body, so as to increase the insulation distance between the coil lead terminal and the static contact part.

[0006] Further, an outer shell is further included, which is in the shape of a cover body with an opening facing downward, the outer shell covers the outside of the base part, and the inner side face of the outer shell corresponds to and matches the side face of the base part; among the inner side faces of the outer shell corresponding to the two side faces of the first plastic body along the length direction, a sunken groove for accommodating the boss is further arranged; the sunken groove further extends downward out of the bottom edge of the outer shell.

[0007] Among the outer shell, the profile face of the upper edge of the sunken groove is a substantially right-angled edge, and a gap is left between the upper edge of the boss of the base and the profile face of the upper edge of the sunken groove.

[0008] The side surface of the first plastic body is further provided with a recessed surface at the assembly position of the coil lead-out terminal and the reed lead-out terminal, respectively, and the coil lead-out terminal and the reed lead-out terminal assembled in the recessed surface are substantially flush with the side surface of the first plastic body as a reference surface; the recessed surface is lower than the reference surface, the top surface of the boss is a plane, the boss surface is higher than the reference surface, and higher than the outer side surface of the coil lead-out terminal and the reed lead-out terminal.

[0009] Further, the dynamic reed armature part is further provided with a hinge structure at both sides of the middle part and a dynamic contact part at both ends of the length of the dynamic reed armature part; the two hinge structures of the dynamic reed armature part are hingedly fitted at both sides of the middle part of the top surface of the base part; the two ends of the dynamic reed armature part are respectively fitted at both ends of the length of the base part; in the side surface of the first plastic body, the one coil terminal is distributed at one end corresponding to the length of the base part; the at least two static reed pieces are sequentially arranged along the length direction of the base part towards the other end of the length of the base part; the at least two static reed pieces include a first static reed piece with a static contact part arranged above the coil lead-out terminal and a second static reed piece providing a support position for the hinge structure of the dynamic reed armature part, and the first reed lead-out terminal and the second reed lead-out terminal are sequentially arranged relative to the coil lead-out terminal.

[0010] In the side surface of the first plastic body, the boss includes a first boss arranged between the coil lead-out terminal and the first reed lead-out terminal, and a second boss arranged between the first reed lead-out terminal and the second reed lead-out terminal; the first boss further extends upwards to be higher than the lead-out position of the coil lead-out terminal from the side surface of the first plastic body and extends along the horizontal direction to the one end of the length of the base part to block between the coil lead-out terminal and the static contact part of the first static reed piece.

[0011] The upper edge of the first boss is substantially flush with the lead-out position of the first reed lead-out terminal from the side surface of the first plastic body, and the middle part of the first reed lead-out terminal is bent to have a horizontal section; the lower edge of the first boss is lower than the lower edge of the horizontal section of the first reed lead-out terminal.

[0012] The coil is further provided with a coil winding head beside the coil lead-out terminal; the coil winding head is covered in the first boss.

[0013] The length of the first boss along the length direction of the base part is not less than the length of the static contact part of the first static reed piece along the length direction of the base part, so as to prevent the glue from flowing upwards from the bottom of the base to the position of the static contact part of the first static reed piece when the relay is dispensing.

[0014] The upper edge of the second boss is substantially flush with the higher one of the position where the first spring lead terminal is led out from the side surface of the first plastic body and the position where the second spring lead terminal is led out from the side surface of the first plastic body, and the middle part of the second spring lead terminal is bent to have a horizontal section; the lower edge of the second boss is lower than the lower edge of the horizontal section of the first spring lead terminal and lower than the lower edge of the horizontal section of the second spring lead terminal.

[0015] The support position of the hinge structure of the second static spring reed for the moving spring armature part is designed as a Z-shaped welding platform; the side surface of the first plastic body corresponding to the upper edge of the Z-shaped welding platform is provided with a trapezoidal notch for realizing welding platform positioning, the horizontal section of the first spring lead terminal corresponds below the trapezoidal notch, and the length of the horizontal section of the first spring lead terminal in the length direction of the base part is greater than the size of the trapezoidal notch in the same direction; the length of the second boss along the length direction of the base part is not less than the length of the lower edge of the Z-shaped welding platform of the second static spring reed along the length direction of the base part, so as to prevent glue from flowing upward from the bottom of the base to the position of the Z-shaped welding platform of the second static spring reed when the relay is dispensing.

[0016] The at least two static spring reeds further include a third static spring reed for arranging the static contact part at the other end of the length of the base part; and the first spring lead terminal, the second spring lead terminal and the third spring lead terminal are arranged in sequence relative to the coil lead terminal; in the side surface of the first plastic body, the boss further includes a third boss arranged between the second spring lead terminal and the third spring lead terminal.

[0017] The upper edge of the third boss is substantially flush with the higher one of the position where the second spring lead terminal is led out from the side surface of the first plastic body and the position where the third spring lead terminal is led out from the side surface of the first plastic body; the middle part of the third spring lead terminal is bent to have a horizontal section; the lower edge of the third boss is lower than the lower edge of the horizontal section of the second spring lead terminal and lower than the lower edge of the horizontal section of the third spring lead terminal.

[0018] The positions where the first spring lead terminal, the second spring lead terminal and the third spring lead terminal are led out from the side surface of the first plastic body are substantially flush in the height direction of the base part; the horizontal sections of the first spring lead terminal, the second spring lead terminal and the third spring lead terminal are substantially flush in the height direction of the base part, and the widths of the horizontal sections of the first spring lead terminal, the second spring lead terminal and the third spring lead terminal are substantially equal.

[0019] The side surface of the first plastic body is provided with a chamfer at the bottom position; the upper edge of the horizontal section of the first reed lead-out terminal, the horizontal section of the second reed lead-out terminal and the horizontal section of the third reed lead-out terminal is lower than the lead-out position of the first reed lead-out terminal, the second reed lead-out terminal and the third reed lead-out terminal from the side surface of the first plastic body in the height direction of the base part; the lower edge of the horizontal section of the first reed lead-out terminal, the horizontal section of the second reed lead-out terminal and the horizontal section of the third reed lead-out terminal is higher than the chamfer of the side surface of the first plastic body in the height direction of the base part.

[0020] The length of the horizontal section of the third reed lead-out terminal along the length direction of the base part is not less than the length of the static contact point part of the third reed along the length direction of the base part, so as to prevent the glue from flowing upward from the bottom of the base to the position of the static contact point part of the third reed when the relay is dispensing glue.

[0021] The first boss is provided with a gap between the coil lead-out terminal and the first reed lead-out terminal, the second boss is provided with a gap between the first reed lead-out terminal and the second reed lead-out terminal, and the third boss is provided with a gap between the second reed lead-out terminal and the third reed lead-out terminal.

[0022] The upper edge of the horizontal section of the first reed lead-out terminal, the horizontal section of the second reed lead-out terminal and the horizontal section of the third reed lead-out terminal is a substantially right-angled edge.

[0023] The top surface of the first plastic body is further provided with a plastic block at the top position corresponding to the first reed and the third reed, the upper surface of the plastic block is higher than the static contact point part of the first reed and the third reed, and lower than the top surface of the upper edge of the Z-shaped welding platform; the vertical edge of the plastic block close to the static contact point part is a substantially right-angled edge.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] 1. The present application is provided with a boss between the coil lead-out terminal and the reed lead-out terminal and between the adjacent two reed lead-out terminals, so as to increase the insulation distance between the coil lead-out terminal and the reed lead-out terminal and between the adjacent two reed lead-out terminals. The structure of the present application can increase the insulation performance between the coil terminal and the reed terminal and between the reed terminals without increasing the product size.

[0026] 2. In this invention, a boss is provided on the side of the first plastic body between the coil lead-out terminal and the stationary contact portion of the stationary spring sheet. This structure of the invention can increase the insulation performance between the coil terminal and the contact without increasing the product size.

[0027] 4. This invention employs a first boss and a second boss, with the length of the first boss along the length of the base portion designed to be no less than the length of the stationary contact portion of the first stationary spring along the length of the base portion; the length of the second boss along the length of the base portion designed to be no less than the length of the lower edge of the Z-shaped soldering station of the second stationary spring along the length of the base portion; the horizontal segment of the first spring lead-out terminal is positioned below the trapezoidal notch; the horizontal segment of the third spring lead-out terminal along the length of the base portion is no less than the length of the stationary contact portion of the third stationary spring along the length of the base portion; and the upper edges of the horizontal segments of the first, second, and third spring lead-out terminals are cut off. The difference in elevation between the upper edges of the first, second, and third bosses and the reference surface, and the difference in elevation between the reference surface and the recessed surface are respectively set as approximately right-angled edges. This structure of the present invention can reduce the performance requirements of the adhesive without increasing the product size, improve the dispensing manufacturing process, and better ensure that the inside of the product is not contaminated by adhesive leakage.

[0028] 5. This invention features a coil winding head encased within the first boss. This structure, utilizing the cooperation between the first boss on the base and the corresponding recessed groove on the outer shell, ensures the coil winding head length, optimizes the coil winding and tinning process, reduces product size, and simultaneously guarantees reliable insulation performance.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the ultra-miniature relay of the present invention is not limited to the embodiments. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of an ultra-miniature relay based on existing technology;

[0031] Figure 2 This is a three-dimensional structural diagram of an ultra-miniature relay in the prior art (with the outer casing removed);

[0032] Figure 3 This is a three-dimensional structural diagram of the base portion of an ultra-miniature relay in the prior art;

[0033] Figure 4is a schematic view of the spring and coil mating of a subminiature relay base portion of the prior art;

[0034] Figure 5 is a perspective view schematic of an embodiment of the present invention;

[0035] Figure 6 is a perspective view schematic of an embodiment of the present invention (bottom turned up);

[0036] Figure 7 is a cross-sectional view schematic of an embodiment of the present invention;

[0037] Figure 8 is a perspective view schematic of an embodiment of the present invention (housing removed);

[0038] Figure 9 is a perspective view schematic of a housing of an embodiment of the present invention (bottom turned up);

[0039] Figure 10 is a perspective view schematic of a base portion of an embodiment of the present invention;

[0040] Figure 11 is a front view of a base portion of an embodiment of the present invention;

[0041] Figure 12 is a perspective view schematic of a base portion of an embodiment of the present invention (turned at an angle);

[0042] Figure 13 is a perspective view schematic of a first plastic body of a base portion of an embodiment of the present invention;

[0043] Figure 14 is a perspective view schematic of a base portion of an embodiment of the present invention (first plastic body removed);

[0044] Figure 15 is a front view of a base portion of an embodiment of the present invention (first plastic body removed);

[0045] Figure 16 is a schematic view of the coil terminal and stationary spring spring piece mating of a base portion of an embodiment of the present invention;

[0046] Figure 17 is a perspective view schematic of a coil of a base portion of an embodiment of the present invention;

[0047] Figure 18 is a perspective view schematic of a coil former of a coil of a base portion of an embodiment of the present invention;

[0048] Figure 19 is a perspective view schematic of a moving spring armature portion of an embodiment of the present invention. DETAILED DESCRIPTION

[0049] EMBODIMENT

[0050] Referring to Figures 5 to 19 As shown in the drawings, the super-miniature relay of the present application comprises a housing 1, a base part 2 and a moving spring armature part 3; the base part 2 comprises a coil 21, a static spring reed 22, a coil terminal 23 and a first plastic body 24 which is formed by injection molding to integrate the coil 21, the static spring reed 22 and the coil terminal 23 into one whole piece; the static spring reed 22 comprises a static contact part and a reed lead terminal; the coil terminal 23 comprises a coil lead terminal 231; among the two lengthwise sides of the first plastic body 24, there are respectively distributed one coil terminal 23 and at least two static spring reeds 22; the static contact part of the static spring reed 22 is exposed on the top surface of the first plastic body 24, the reed lead terminal of the static spring reed 22 is exposed on the side surface of the first plastic body 24 and extends downward beyond the bottom surface of the first plastic body 24; the coil lead terminal 231 is also exposed on the side surface of the first plastic body 24 and extends downward beyond the bottom surface of the first plastic body 24; among the side surface of the first plastic body 24, between the coil lead terminal and the static contact part of the static spring reed, between the coil lead terminal and the reed lead terminal and between the adjacent two reed lead terminals, there are respectively provided bosses 4, so as to increase the insulation distance between the coil lead terminal and the static contact part and between the adjacent lead terminals.

[0051] In this embodiment, the housing 1 is in the shape of a cover body with the opening facing downward, the housing 1 covers the base part 2, and the inner side surface of the housing 1 corresponds to the side surface of the base part 2; among the inner side surface of the housing 1 corresponding to the two lengthwise sides of the first plastic body, there are also provided sunken grooves 5 for accommodating the bosses 4; the sunken grooves 5 also extend downward beyond the bottom edge of the housing 1.

[0052] In this embodiment, among the housing 1, the profile surface of the upper edge of the sunken groove 5 is substantially a right-angle edge, and there is a gap between the upper edge of the sunken groove 5 and the upper edge of the boss 4 of the base part. This structure is beneficial to block the leakage of glue along the housing.

[0053] In this embodiment, among the side surface of the first plastic body 24, at the assembling positions of the coil lead terminal and the reed lead terminal, there are also respectively provided sunken surfaces 241, and the coil lead terminal 231 and the reed lead terminal assembled in the sunken surfaces 241 are substantially flush with the side surface of the first plastic body 24 as a reference surface 242; the sunken surface 241 is lower than the reference surface 242, the top surface of the boss is a flat surface, the boss surface 243 is higher than the reference surface 242 and higher than the outer side surface of the coil lead terminal and the reed lead terminal.

[0054] In this embodiment, the moving spring armature part 3 comprises hinge structures 31 at both sides of the middle part and moving contact parts 32 at both ends of the length of the moving spring armature part; the two hinge structures 31 of the moving spring armature part 3 are hingedly fitted at both sides of the middle part of the top surface of the base part 2 and accommodated in the space enclosed by the housing 1 and the base part 2; the two ends of the moving spring armature part 3 are respectively fitted at both ends of the length of the base part 2; in the side surface (the side surface along the length direction) of the first plastic body 24, the one coil terminal 23 is distributed at the end of the length of the base part 2 corresponding to the coil lead-out terminal 231; the at least two static spring reeds 22 are sequentially arranged along the length direction of the base part 2 towards the other end of the length of the base part; the at least two static spring reeds 22 comprise a first static spring reed 221 having a static contact part 2211 arranged above the coil lead-out terminal 231 and a second static spring reed 222 providing a support position for the hinge structure of the moving spring armature part, and the first reed lead-out terminal 2212 and the second reed lead-out terminal 2222 are sequentially arranged relative to the coil lead-out terminal 231.

[0055] In this embodiment, in the side surface of the first plastic body 24, the boss comprises a first boss 41 arranged between the coil lead-out terminal 231 and the first reed lead-out terminal 2212 and a second boss 42 arranged between the first reed lead-out terminal 2212 and the second reed lead-out terminal 2222; the first boss 41 further extends upwards to be higher than the lead-out position of the coil lead-out terminal 231 from the side surface of the first plastic body 24 and extends along the horizontal direction towards the end of the length of the base part to block between the coil lead-out terminal 231 and the static contact part 2211 of the first static spring reed 221.

[0056] In this embodiment, the first boss 41 is generally L-shaped, the upper edge of the first boss 41 is substantially flush with the lead-out position of the first reed lead-out terminal 2212 from the side surface of the first plastic body 24, and the middle part of the first reed lead-out terminal 2212 is bent to have a horizontal section 2213; the lower edge of the first boss 41 is lower than the lower edge of the horizontal section 2213 of the first reed lead-out terminal 2212.

[0057] In this embodiment, the coil 21 further has a coil winding head 211 arranged beside the coil lead-out terminal; the coil winding head 211 is covered in the first boss 41.

[0058] In the embodiment, the length of the first boss 41 along the length direction of the base part is not less than the length of the static contact part 2211 of the first static spring along the length direction of the base part, so as to prevent the glue from flowing up from the bottom of the base to the position of the static contact part 2211 of the first static spring when the relay is glued.

[0059] In the embodiment, the upper edge of the second boss 42 is generally flush with the higher one of the leading-out position of the first spring leading-out terminal 2212 from the side of the first plastic body 24 and the leading-out position of the second spring leading-out terminal 2222 from the side of the first plastic body 24, and the middle part of the second spring leading-out terminal is bent to form a horizontal section 2223; the lower edge of the second boss 42 is lower than the lower edge of the horizontal section 2213 of the first spring leading-out terminal 2212 and lower than the lower edge of the horizontal section 2223 of the second spring leading-out terminal 2222.

[0060] In the embodiment, the support position of the hinge structure of the moving spring armature part of the second static spring is a Z-shaped welding platform 2221; the side of the first plastic body corresponding to the upper edge 22211 of the Z-shaped welding platform 2221 is provided with a trapezoidal notch 244 for positioning the welding platform, the horizontal section 2213 of the first spring leading-out terminal 2212 is below the trapezoidal notch 244, and the length of the horizontal section 2213 of the first spring leading-out terminal in the length direction of the base part is greater than the length of the trapezoidal notch 244 in the same direction; the length of the second boss 42 along the length direction of the base part is not less than the length of the lower edge 22212 of the Z-shaped welding platform 2221 of the second static spring along the length direction of the base part 2, so as to prevent the glue from flowing up from the bottom of the base to the position of the Z-shaped welding platform of the second static spring when the relay is glued. The second boss 41 blocks the lower edge of the bending part of the welding platform, so that the plastic sealing glue, when leaking along the side of the base, is blocked by the second boss 41 and cannot leak upward, avoiding pollution of the welding platform hinge position.

[0061] In the embodiment, the at least two static springs further include a third static spring 223 whose static contact part 2231 is arranged at the other end of the length of the base part; and the first spring leading-out terminal 2212, the second spring leading-out terminal 2222 and the third spring leading-out terminal 2232 are sequentially arranged relative to the coil leading-out terminal 231; the boss further includes a third boss 43 arranged between the second spring leading-out terminal 2222 and the third spring leading-out terminal 2232 in the side of the first plastic body 24.

[0062] In this embodiment, the upper edge of the third boss 43 is substantially flush with the higher one of the position where the second spring lead terminal 2222 is led out from the side of the first plastic body 24 and the position where the third spring lead terminal 2232 is led out from the side of the first plastic body; the middle part of the third spring lead terminal 2232 is bent to have a horizontal section 2233; the lower edge of the third boss 43 is lower than the lower edge of the horizontal section 2233 of the third spring lead terminal 2232 and the lower edge of the horizontal section 2223 of the second spring lead terminal 2222.

[0063] In this embodiment, the sink grooves 5 of the shell 1 are respectively a sink groove 51 corresponding to the first boss 41, a sink groove 52 corresponding to the second boss 42 and a sink groove 53 corresponding to the third boss 43.

[0064] In this embodiment, the positions where the first spring lead terminal 2212, the second spring lead terminal 2222 and the third spring lead terminal 2232 are led out from the side of the first plastic body are substantially flush in the height direction of the base part; the horizontal sections 2213, 2223 and 2233 of the first, second and third spring lead terminals are substantially flush in the height direction of the base part, and the widths of the horizontal sections 2213, 2223 and 2233 are substantially equal. This structure of the present application can reduce the manufacturing difficulty.

[0065] In this embodiment, the side of the first plastic body 24 is provided with a chamfer 245 at the bottom position; the upper edges of the horizontal sections 2213, 2223 and 2233 of the first, second and third spring lead terminals are lower than the positions where the first, second and third spring lead terminals 2212, 2222 and 2232 are led out from the side of the first plastic body 24 in the height direction of the base part; the lower edges of the horizontal sections 2213, 2223 and 2233 of the first, second and third spring lead terminals are higher than the chamfer 245 of the side of the first plastic body 24 in the height direction of the base part.

[0066] In this embodiment, the length of the horizontal section 2233 of the third spring lead terminal along the length direction of the base part is not less than the length of the static contact part 2231 of the third spring along the length direction of the base part, so as to prevent the glue from flowing up from the bottom of the base to the position of the static contact part of the third spring when the glue is applied to the relay.

[0067] In this embodiment, the upper edges of the horizontal sections 2213 of the first reed lead terminal, the horizontal sections 2223 of the second reed lead terminal, and the horizontal sections 2233 of the third reed lead terminal are cut off at right angles. When the base is sealed by dispensing glue, the glue will stop leaking at these right-angle edges due to the corner resistance, thereby avoiding contamination of the moving structure and the contact part above the base.

[0068] In this embodiment, the top surface of the first plastic body 24 is further provided with plastic blocks 246 and 247 at positions corresponding to the top of the first reed 221 and the third reed 223, respectively. The upper surfaces of the plastic blocks 246 and 247 are higher than the static contact parts 2211 of the first reed 221 and the static contact parts 2231 of the third reed 223, and lower than the top surface of the upper edge 22211 of the Z-shaped soldering platform. The vertical edges of the plastic blocks 246 and 247 near the positions of the corresponding static contact parts are right-angle edges. The vertical edges of the plastic blocks near the positions of the contacts are right-angle edges, further blocking the leakage of glue along the positions of the contacts and the soldering platform.

[0069] In this embodiment, the side surface of the first plastic body 24 is generally provided with three stepped planes: the sunken surface 241 is a plane recessed in the main side surface, with a recess depth generally consistent with the thickness of the lead terminal, for positioning the terminal and the side surface of the base; the reference surface 242 is the main side surface determining the width of the base, cooperating with the inner cavity of the shell to determine the width of the product; and the boss surface 243 is a plastic boss surface higher than the reference surface 242 and also higher than the outer contour surface of the lead terminal.

[0070] The first boss 41 covers the coil winding head between the coil lead terminal 231 and the first reed lead terminal 2212 with boss plastic, thereby increasing the insulation between the coil part and the reed part, without increasing the width of the base, thereby reducing the width of the relay product. Meanwhile, covering the coil winding head with the plastic of the first boss 41 can ensure that the length of the coil winding head meets the requirements of the manufacturing process, and better realize the stability of the winding enameled wire and soldering of the coil winding head.

[0071] The first boss 41 can be spaced apart from the coil lead terminal 231 and the first reed lead terminal 2212, the second boss 42 can be spaced apart from the first reed lead terminal 2212 and the second reed lead terminal 2222, and the third boss 43 can be spaced apart from the second reed lead terminal 2222 and the third reed lead terminal 2232. The spacing can be adjusted according to the flowability and viscosity of the glue to ensure good manufacturing process.

[0072] The first boss 41, the second boss 42, and the third boss 43 are arranged between the coil lead terminal 231 and the static contact portion 2211 of the first reed, between the coil lead terminal 231 and the first reed lead terminal 2212, and between adjacent reed lead terminals, respectively. This increases the insulation distance between the coil lead terminal and the static contact portion, and between adjacent reed lead terminals. This structure does not increase the size of the product, and increases the insulation performance between the coil terminal and the reed terminal, between the coil terminal and the contact, and between the reed terminals.

[0073] The first boss 41, the second boss 42, and the third boss 43 are arranged between the coil lead terminal 231 and the static contact portion 2211 of the first reed, between the coil lead terminal 231 and the first reed lead terminal 2212, and between adjacent reed lead terminals, respectively. This increases the insulation distance between the coil lead terminal and the static contact portion, and between adjacent reed lead terminals. This structure does not increase the size of the product, and increases the insulation performance between the coil terminal and the reed terminal, between the coil terminal and the contact, and between the reed terminals.

[0074] The super-small relay of the present application adopts the coil winding head 211 which is covered in the first boss 41. The structure of the present application uses the cooperation of the first boss 41 of the base and the sunken groove 11 of the corresponding position of the shell 1 to ensure the length of the coil winding head, optimize the winding and tin dipping process of the coil winding head, reduce the product size, and ensure reliable insulation performance.

[0075] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make many possible changes and modifications to the technical solution of the present application or modify equivalent embodiments without departing from the scope of the technical solution of the present application by using the disclosed technical content. Therefore, any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application without departing from the content of the technical solution of the present application shall fall within the scope of protection of the technical solution of the present application.

Claims

1. A subminiature relay comprising a base portion and a housing; the base portion comprising a coil, a static spring reed, a coil terminal, and a first plastic body which integrally assembles the coil, the static spring reed, and the coil terminal by injection molding; the static spring reed comprising a static contact portion and a reed lead terminal; the coil terminal comprising a coil lead terminal; each of two side surfaces of the first plastic body along a length direction is distributed with one coil terminal and at least two static spring reeds; the static contact portion of the static spring reed is exposed on a top surface of the first plastic body, the reed lead terminal of the static spring reed is exposed on a side surface of the first plastic body and extends downward beyond a bottom surface of the first plastic body, and the coil lead terminal is also exposed on the side surface of the first plastic body and extends downward beyond the bottom surface of the first plastic body; characterized in that: The first plastic body is provided with a boss between the coil lead terminal and the reed lead terminal and between two adjacent reed lead terminals, so as to increase the insulation distance between the coil lead terminal and the reed lead terminal and between two adjacent reed lead terminals.

2. The micro-relay according to claim 1, characterized in that: The first plastic body is provided with a boss between the coil lead terminal and the reed lead terminal and between two adjacent reed lead terminals, so as to increase the insulation distance between the coil lead terminal and the reed lead terminal and between two adjacent reed lead terminals.

3. A micro-relay according to claim 1 or 2, characterized in that: The housing is a cover-shaped body with an opening facing downward, and the inner wall of the housing is provided with a sunken groove corresponding to the two sides of the first plastic body along the length direction, and the sunken groove extends downward to the bottom edge of the housing.

4. The micro-relay according to claim 1 or 2, characterized in that: The first plastic body is provided with a boss between the coil lead terminal and the reed lead terminal and between two adjacent reed lead terminals, so as to increase the insulation distance between the coil lead terminal and the reed lead terminal and between two adjacent reed lead terminals.

5. The micro-relay according to claim 4, characterized in that: Further, the dynamic reed armature part includes two hinge structures at the two sides of the middle part and dynamic contact parts at the two ends of the length of the dynamic reed armature part. The two ends of the dynamic reed armature part are respectively fitted into the two ends of the length of the base part.

6. The micro-relay according to claim 5, characterized in that: In the side of the first plastic body, the one coil terminal is arranged at one end of the length of the base part, and the at least two static reed pieces are sequentially arranged along the length direction of the base part towards the other end of the length of the base part. In the side of the first plastic body, the boss includes a first boss arranged between the coil lead terminal and the first static reed piece lead terminal, and a second boss arranged between the first static reed piece lead terminal and the second static reed piece lead terminal.

7. The micro-relay according to claim 6, characterized in that: The upper edge of the first boss is substantially flush with the position where the first static reed lead-out terminal is led out from the side surface of the first plastic body, and the middle part of the first static reed lead-out terminal is bent to form a horizontal section; the lower edge of the first boss is lower than the lower edge of the horizontal section of the first static reed lead-out terminal.

8. The micro-relay according to claim 7, characterized in that: The coil is further provided with a coil winding head beside the coil lead-out terminal, and the coil winding head is covered in the first boss; and / or the length of the first boss along the length direction of the base part is not less than the length of the static contact part of the first static reed along the length direction of the base part, so as to prevent glue from flowing up from the bottom of the base to the position of the static contact part of the first static reed during the dispensing of glue for the relay.

9. The micro-relay according to claim 6, characterized in that: The upper edge of the second boss is substantially flush with the higher one of the position where the first static reed lead-out terminal is led out from the side surface of the first plastic body and the position where the second static reed lead-out terminal is led out from the side surface of the first plastic body, and the middle part of the second static reed lead-out terminal is bent to form a horizontal section; the lower edge of the second boss is lower than the lower edge of the horizontal section of the first static reed lead-out terminal and lower than the lower edge of the horizontal section of the second static reed lead-out terminal.

10. The micro-relay according to claim 7, characterized in that: The support position of the hinge structure for the moving reed armature part of the second static reed is designed as a Z-shaped welding platform; the side surface of the first plastic body corresponding to the upper edge of the Z-shaped welding platform is provided with a trapezoidal notch for realizing the positioning of the welding platform, the horizontal section of the first static reed lead-out terminal is arranged below the trapezoidal notch, and the length of the horizontal section of the first static reed lead-out terminal along the length direction of the base part is greater than the length of the trapezoidal notch along the same direction; the length of the second boss along the length direction of the base part is not less than the length of the lower edge of the Z-shaped welding platform of the second static reed along the length direction of the base part, so as to prevent glue from flowing up from the bottom of the base to the position of the Z-shaped welding platform of the second static reed during the dispensing of glue for the relay.

11. The micro-relay according to claim 10, characterized in that: The at least two static reeds further include a third static reed whose static contact part is arranged at the other end of the length of the base part; and the first static reed lead-out terminal, the second static reed lead-out terminal and the third static reed lead-out terminal are arranged in sequence relative to the coil lead-out terminal; in the side surface of the first plastic body, the boss further includes a third boss arranged between the second static reed lead-out terminal and the third static reed lead-out terminal.

12. The micro-relay according to claim 11, characterized in that: The upper edge of the third boss is substantially flush with the higher one of the position where the second static reed lead-out terminal is led out from the side surface of the first plastic body and the position where the third static reed lead-out terminal is led out from the side surface of the first plastic body; the middle part of the third static reed lead-out terminal is bent to form a horizontal section; the lower edge of the third boss is lower than the lower edge of the horizontal section of the second static reed lead-out terminal and lower than the lower edge of the horizontal section of the third static reed lead-out terminal.

13. The micro-relay according to claim 12, characterized in that: The first, second and third static reed lead-out terminals are substantially flush with each other in the height direction of the base portion from the lead-out positions of the first plastic body; the horizontal sections of the first, second and third static reed lead-out terminals are substantially flush with each other in the height direction of the base portion, and the widths of the horizontal sections of the first, second and third static reed lead-out terminals are substantially equal.

14. The micro-relay according to claim 13, characterized in that: The side surface of the first plastic body is chamfered at the bottom position; the upper edges of the horizontal sections of the first, second and third static reed lead-out terminals are lower than the lead-out positions of the first, second and third static reed lead-out terminals from the side surface of the first plastic body in the height direction of the base portion; and the lower edges of the horizontal sections of the first, second and third static reed lead-out terminals are higher than the chamfered side surface of the first plastic body in the height direction of the base portion.

15. The micro-relay according to claim 14, characterized in that: The length of the horizontal section of the third static reed lead-out terminal along the length direction of the base portion is not less than the length of the static contact portion of the third static reed along the length direction of the base portion, so as to prevent glue from flowing upward from the bottom of the base to the position of the static contact portion of the third static reed when the relay is dispensing glue.

16. The micro-relay according to claim 15, characterized in that: Gaps are provided between the first boss and the coil lead-out terminal, between the first static reed lead-out terminal and the second static reed lead-out terminal, between the second static reed lead-out terminal and the third static reed lead-out terminal, and / or the upper edges of the horizontal sections of the first, second and third static reed lead-out terminals are substantially right-angled edges.

17. The micro-relay according to claim 11, characterized in that: The top surface of the first plastic body is further provided with a plastic block at the position corresponding to the top of the first and third static reeds, the upper surface of the plastic block is higher than the static contact portions of the first and third static reeds and lower than the top surface of the upper edge of the Z-shaped soldering platform; and the vertical edge of the plastic block near the static contact portion is a substantially right-angled edge.

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