A miniaturized PCB relay

Abstract

The invention discloses a miniaturized PCB relay, comprising an iron core, an armature, a movable spring, a static spring normally open end and a static spring normally closed end; the root of the movable part of the movable spring is fixed in one side of the armature and the other side of the armature is in a corresponding matching position with the pole face of the iron core; the movable part of the movable spring is provided with a movable contact at the end thereof and is respectively matched between the static spring normally open end and the static spring normally closed end; a groove is provided in one side of the armature between the fixed position corresponding to the root of the movable part of the movable spring and the position where the movable contact is provided on the movable spring and corresponding to the pole face of the iron core. The invention can reduce the weight of the armature on the basis of ensuring the effective magnetic conductive area of ​​the armature to avoid the jitter problem generated when the normally open end contact is closed, and can also ensure the pressure of the normally closed end contact to ensure the stability of the relay parameters.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a miniaturized PCB relay. Background Art

[0002] A PCB relay is a relay used to be installed on a PCB board (i.e., a printed circuit board). Due to the limited installation space on the PCB board, the volume of a PCB relay is usually designed to be small. With the continuous advancement of relay miniaturization, the installation area of ​​PCB relays has become smaller and smaller, and the area of ​​the armature has also become smaller. In order to ensure sufficient product suction and to ensure the effective magnetic conductive area of ​​the armature and avoid magnetic saturation, it is necessary to increase the thickness of the armature. However, after the thickness of the armature increases, the weight of the armature will also increase. When the weight of the armature increases, the contact kinetic energy between the moving contact and the static contact increases when the relay is actuated. When the normally open end contact is closed, it is easy to cause the problem of jitter when the product is attracted, thereby affecting the electrical life of the product. In order to solve the problem of jitter when the product is attracted, the method adopted by the prior art is to directly flatten the head of the armature to reduce the weight of the armature. However, after the head of the armature is flattened, the support position of the head of the armature on the moving spring piece will be displaced in the direction away from the moving contact, which will cause the pressure of the static spring at the normally closed end to decrease, thereby affecting the stability of the relay parameters. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a miniaturized PCB relay. Through structural improvement, on the one hand, it can reduce the weight of the armature on the basis of ensuring the effective magnetic conductive area of ​​the armature to avoid the jitter problem caused by the closing of the normally open end contacts, and ensure the pressure of the normally closed end contacts to ensure the stability of the relay parameters; on the other hand, it can make the distribution of product components more compact to achieve further miniaturization of the product.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a miniaturized PCB relay, comprising an iron core, an armature, a moving spring, a static spring normally open end and a static spring normally closed end; the root of the swingable part of the moving spring is fixed in one side of the armature and the other side of the armature is in a corresponding matching position with the pole surface of the iron core; the end of the swingable part of the moving spring is provided with a moving contact and is respectively matched between the static spring normally open end and the static spring normally closed end, and the static spring normally open end is located on the side of the moving spring facing the pole surface of the iron core, and the static spring normally closed end is located on the side of the moving spring facing away from the pole surface of the iron core. This side of the pole surface; in one side of the armature, a groove is provided between the fixed position corresponding to the root of the swingable part of the movable spring and the position where the movable contact is installed on the movable spring and corresponding to the pole surface of the iron core, so as to utilize the groove to reduce the weight of the armature on the basis of ensuring the effective magnetic conductive area of ​​the armature to avoid the jitter generated when the normally open end contact is closed; in one side of the armature, the groove of the armature to the terminal end edge of the armature also has a solid section, and the solid section cooperates with the movable spring so that when the armature is released, the solid section is used to press against the movable spring to ensure the pressure of the normally closed end contact.

[0005] The groove is in the shape of a long strip arranged along the width direction of the armature and runs through both sides of the width of the armature; the width of the groove, corresponding to the pole surface of the iron core, falls in the area of ​​the pole surface of the iron core, includes the center of the pole surface of the iron core, and is biased towards the contact direction.

[0006] The relay also includes a coil frame and a base; the coil frame is provided with an iron core mounting hole, and the axis of the iron core mounting hole of the coil frame is vertically arranged; the iron core is installed in the iron core mounting hole of the coil frame with the pole surface of the iron core facing upward; the armature is fitted above the upper flange of the coil frame, and the base and the lower flange of the coil frame are connected as a whole to form a lower flange base assembly.

[0007] The normally open end of the static spring is a normally open static contact, and the normally closed end of the static spring is a normally closed static contact; the relay also includes a normally open static spring terminal and a normally closed static spring terminal; the tops of the normally open static spring terminal and the normally closed static spring terminal are respectively fixedly connected to the normally open static contact and the normally closed static contact; the normally open static spring terminal and the normally closed static spring terminal are respectively inserted into the coil frame from top to bottom, so as to facilitate the normally open static spring terminal to adjust the contact overtravel and the normally closed static spring terminal to adjust the contact gap.

[0008] The normally open static spring terminal and the normally closed static spring terminal are respectively inserted into the upper flange of the coil frame and the lower flange base assembly of the coil frame; the upper flange of the coil frame and the lower flange base assembly of the coil frame are respectively provided with plug-in holes; the normally open static spring terminal and the normally closed static spring terminal are respectively provided with convex buds for achieving interference fit and barbs on the convex buds for preventing withdrawal after insertion at the matching position with the plug-in hole of the lower flange base assembly; the normally open static spring terminal and the normally closed static spring terminal have a clearance fit with the plug-in hole of the upper flange of the coil frame; the normally open static spring terminal and the normally closed static spring terminal have an interference fit with the plug-in hole of the lower flange base assembly of the coil frame.

[0009] The relay also includes two coil terminals; the two coil terminals are respectively inserted into the lower flange base assembly of the coil frame from the bottom of the coil frame in a direction perpendicular to the bottom of the coil frame; the coil terminals include a vertically arranged winding terminal appearing in the winding window of the coil frame and a vertically arranged lead-out pin appearing outside the bottom of the coil frame; the winding terminal and the lead-out pin of the same coil terminal are staggered, and the winding terminal is close to the inner side of the coil frame, and the lead-out pin is close to the outer side of the coil frame.

[0010] The winding terminals and lead pins of the coil terminal are inserted and fixed at the staggered positions on the lower flange base assembly of the coil frame; a step-type plug-in hole with a step surface facing downward is provided at the corresponding position on the lower flange base assembly of the coil frame, and a step-type plug-in portion with a step surface facing upward is provided at the plug-in position of the coil terminal; the upper part of the step surface of the step-type plug-in portion of the coil terminal is clearance-fitted with the upper part of the step surface of the step-type plug-in hole of the lower flange base assembly; the lower part of the step surface of the step-type plug-in portion of the coil terminal is interference-fitted with the lower part of the step surface of the step-type plug-in hole of the lower flange base assembly.

[0011] The normally open static spring terminal and the normally closed static spring terminal respectively include lead pins extending to the bottom of the lower flange base assembly, and the lead pins of the normally open static spring terminal and the lead pins of the normally closed static spring terminal are respectively located on both sides of one end of the length of the relay, and the lead pins of the two coil terminals are located in the middle of one end of the length of the relay, and are staggered with the lead pins of the normally open static spring terminal and the normally closed static spring terminal in the length direction of the relay.

[0012] The relay also includes a yoke; the yoke is L-shaped, the horizontal side of the L-shaped yoke is fixed to the bottom of the iron core, and the vertical side of the L-shaped yoke is adapted to the winding window side of the coil frame; the end of the armature away from the groove is matched with the upper end of the vertical side of the L-shaped yoke; the movable spring is L-shaped, and the horizontal side of the L-shaped movable spring is connected to the armature; the vertical side of the L-shaped movable spring is fixed to the vertical side of the L-shaped yoke by laser welding.

[0013] In the lower flange base assembly of the coil frame, a groove and a convex block are provided on one side corresponding to the length direction of the relay, and the convex block and the groove can be matched with each other; when two identical relays are spliced ​​together, the convex block and the groove of one relay are respectively connected with the groove and the convex block of the other relay, and the two relays are oriented in opposite directions in the length direction.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The present invention adopts a groove in one side of the armature of the relay, between the fixed position corresponding to the root of the swingable part of the moving spring and the position where the moving contact is installed on the moving spring and also corresponding to the pole surface of the iron core, and a solid section is also provided in one side of the armature from the groove of the armature to the end edge of the armature, and the solid section cooperates with the moving spring. With this structure of the present invention, when the width of the relay (i.e., the width corresponding to the moving spring) is getting smaller and smaller, and it is necessary to increase the thickness of the armature to increase the effective magnetic conductive area of ​​the armature to avoid the problem of magnetic saturation, the groove can be used to reduce the weight of the armature on the basis of ensuring the effective magnetic conductive area of ​​the armature to avoid the jitter generated when the normally open end contact is closed; at the same time, the solid section can also be used to ensure the force arm when the normally closed end is closed, and the solid section is used to press against the moving spring to ensure the pressure of the normally closed end contact when the armature is released.

[0016] 2. The present invention adopts a groove that is arranged along the width direction of the armature and runs through both sides of the width of the armature; the width of the groove, corresponding to the pole surface of the core, falls in the area of ​​the pole surface of the core, includes the center of the pole surface of the core, and is biased towards the contact point. In this structure of the present invention, the armature groove is arranged at the center of the core pole shoe surface close to the contact point. Setting it at this position has little effect on the effective magnetic conductive area of ​​the armature. This is because the main magnetic conductive path of the relay is formed by the center of the core pole shoe surface and the yoke on the rear side to form a loop, and the groove is biased to the front side. This can avoid the reduction of the effective magnetic conductive area of ​​the armature due to the increase of the groove in the armature, resulting in the problem of magnetic saturation of the armature (when magnetic saturation of the armature occurs, it will affect the suction of the product).

[0017] 3. The present invention adopts the method of inserting the normally open static spring terminal and the normally closed static spring terminal into the coil frame from top to bottom, and the normally open static spring terminal and the normally closed static spring terminal are designed to have a clearance fit with the plug-in hole of the upper flange of the coil frame and an interference fit with the plug-in hole of the lower flange base assembly of the coil frame. This structure of the present invention, by using the insertion method of the static spring terminal, can facilitate the adjustment of the contact overtravel of the normally open static spring terminal and the adjustment of the contact gap of the normally closed static spring terminal, which is conducive to the miniaturization of relay products; by using the clearance fit with the upper flange of the coil frame and the interference fit with the lower flange base assembly, it can not only ensure the fixation of the static spring terminal, but also avoid the generation of plastic chips around the contact.

[0018] 4. The present invention adopts the method of inserting the coil terminal from the bottom of the coil frame to the lower flange base assembly of the coil frame; and the winding terminal and the lead pin of the coil terminal are staggered, and the winding terminal is close to the inner side of the coil frame, and the lead pin is close to the outer side of the coil frame. This structure of the present invention can reduce the length or width of the relay product by staggering the winding terminal and the lead pin, and realize the miniaturization of the relay product. The insertion method of the coil terminal minimizes the matching area between the coil terminal and the coil frame, which is conducive to the miniaturization of the relay product.

[0019] 5. The present invention adopts a step-type plug-in portion of the coil terminal to match the step-type socket of the lower flange base assembly of the coil frame, and the upper part of the step surface of the two is a clearance fit, and the lower part of the step surface of the two is an interference fit. When the coil terminal is inserted upward from the bottom of the coil frame, the plastic chips generated by the interference fit between the coil terminal and the coil frame are just stored in the step surface of the step-type socket and will not enter the interior of the relay. In addition, the winding terminal of the coil terminal needs to be bent when winding. In order to ensure the small size of the product, it needs to be folded back after winding. Since the upward step surface of the coil terminal and the downward step surface of the coil frame are limited, the matching strength of the coil terminal and the coil frame can be guaranteed.

[0020] 6. The present invention fixes the movable spring and the yoke iron by laser welding, thereby ensuring the dimensional accuracy requirements of miniaturized relay products.

[0021] 7. The present invention adopts a configuration in which a groove and a convex block are provided on one side of the lower flange base assembly of the coil frame corresponding to the length direction of the relay, and the convex block and the groove can be matched with each other. With this structure of the present invention, when two identical relays need to be spliced ​​together, the convex block and the groove of one relay can be respectively connected with the groove and the convex block of the other relay, so that the two relays are oriented in opposite directions in the length direction. In this way, the coil terminals and the static spring terminals of the two relays are located at both ends of the length of the relay, forming a staggered distribution, which is conducive to the miniaturization of relay products.

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the miniaturized PCB relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a three-dimensional structure of an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of the three-dimensional structure of the armature according to an embodiment of the present invention;

[0026] Figure 4 is a front view of an armature of an embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of a three-dimensional structure of two relays assembled together in an embodiment of the present invention;

[0028] Figure 6 1 is a schematic diagram of a three-dimensional structure of two relays assembled together according to an embodiment of the present invention (bottom facing upward);

[0029] Figure 7 is a front view of two relays assembled together in an embodiment of the present invention;

[0030] Figure 8 is along Figure 7 The cross-sectional view of line AA in the figure;

[0031] Fig. 9 is along Figure 7 The cross-sectional view of line BB in FIG.

[0032] Fig.10 is a side view of two relays assembled together according to an embodiment of the present invention;

[0033] Fig.11 yes Fig.10 The enlarged schematic diagram of the C part in FIG.

[0034] Fig.12 is a top view of two relays assembled together according to an embodiment of the present invention;

[0035] Fig.13 is a bottom view of two relays assembled together according to an embodiment of the present invention;

[0036] Fig.14 is along Fig.13 A cross-sectional view of the DD line in FIG.

[0037] Fig.15 is a schematic diagram of the three-dimensional structure of a coil frame according to an embodiment of the present invention;

[0038] Fig.16 1 is a schematic diagram of the three-dimensional structure of a coil frame according to an embodiment of the present invention (bottom facing upward);

[0039] Fig.17 is a schematic diagram of the three-dimensional structure of a coil frame and a coil terminal according to an embodiment of the present invention;

[0040] Fig.18 is a schematic diagram of the matching of a coil frame and a coil terminal according to an embodiment of the present invention;

[0041] Fig.19 is along Fig.18 Cross-sectional view of line EE in FIG. DETAILED DESCRIPTION

[0042] Example

[0043] See also Figures 1 to 19As shown, a miniaturized PCB relay of the present invention comprises an iron core 1, an armature 2, a moving spring 3, a static spring normally open end 41 and a static spring normally closed end 51; the root 34 of the swingable part 31 of the moving spring 3 is fixed in one side 21 of the armature 2 and makes the other side 22 of the armature 2 and the pole surface 11 of the iron core 1 in a corresponding matching position; the moving contact 30 is installed at the end of the swingable part 31 of the moving spring 3 (i.e., the position beyond the armature 2 area) and is respectively matched between the static spring normally open end 41 and the static spring normally closed end 51, and the static spring normally open end 41 is located on the side of the moving spring 3 facing the pole surface 11 of the iron core 1, and the static spring normally closed end 51 is located on the back of the moving spring 3. Towards the side of the pole surface of the iron core; in one side of the armature 2, a groove 23 is provided between the fixed position corresponding to the root of the swingable part 31 of the movable spring and the position where the movable contact 30 is installed on the movable spring and corresponding to the pole surface 11 of the iron core, so as to utilize the groove 23 to reduce the weight of the armature on the basis of ensuring the effective magnetic conductive area of ​​the armature 2 to avoid the jitter generated when the normally open end contact is closed; in one side 21 of the armature 2, the groove 23 of the armature 2 to the end edge of the armature also has a solid section 24, and the solid section 24 cooperates with the movable spring 3, so as to utilize the solid section 24 to press against the movable spring 3 when the armature 2 is released to ensure the normally closed end contact pressure.

[0044] In this embodiment, the groove 23 is in the shape of a long strip arranged along the width of the armature 2 (which is also equivalent to the width direction of the moving spring or the width direction of the relay), and runs through both sides of the width of the armature 2; the width of the groove 23, corresponding to the pole surface 11 of the iron core 1, falls in the area of ​​the pole surface 11 of the iron core 1, includes the center of the pole surface 11 of the iron core 1, and is biased towards the contact direction.

[0045] In this embodiment, the relay also includes a coil frame 6 and a base; the coil frame 6 is provided with a core mounting hole 61, and the axis of the core mounting hole 61 of the coil frame 6 is vertically arranged; the core 1 is installed in the core mounting hole 61 of the coil frame 6 with the pole surface 11 of the core 1 facing upward; the armature 2 is fitted above the upper flange 62 of the coil frame 6, and the base and the lower flange of the coil frame are connected as a whole (for example, injection molding) to form a lower flange base assembly 63.

[0046] In this embodiment, the normally open end 41 of the static spring is a normally open static contact, and the normally closed end 51 of the static spring is a normally closed static contact; the relay also includes a normally open static spring terminal 4 and a normally closed static spring terminal 5; the tops of the normally open static spring terminal 4 and the normally closed static spring terminal 5 are bent and fixedly connected to the normally open static contact 41 and the normally closed static contact 51 respectively; the normally open static spring terminal 4 and the normally closed static spring terminal 4 are respectively inserted into the coil frame 6 from top to bottom, so as to facilitate the normally open static spring terminal 4 to adjust the contact overtravel and the normally closed static spring terminal 5 to adjust the contact gap.

[0047] In this embodiment, the normally open static spring terminal 4 and the normally closed static spring terminal 5 are respectively inserted into the upper flange 62 of the coil frame and the lower flange base assembly 63 of the coil frame; the upper flange 62 of the coil frame and the lower flange base assembly 63 of the coil frame are respectively provided with plug-in holes 621 and 631; the normally open static spring terminal 4 and the normally closed static spring terminal 5 are respectively provided with convex buds 42 and 52 for achieving interference fit and barbs on the convex buds for preventing withdrawal after insertion at the matching position with the plug-in hole 631 of the lower flange base assembly 63; the normally open static spring terminal 4 and the normally closed static spring terminal 5 are gap-fitted with the plug-in hole 621 of the upper flange 62 of the coil frame; the normally open static spring terminal 4 and the normally closed static spring terminal 5 are interference-fitted with the plug-in hole 631 of the lower flange base assembly 63 of the coil frame.

[0048] In this embodiment, the relay further includes two coil terminals 7; the two coil terminals 7 are respectively inserted upward from the bottom of the coil frame 6 to the lower flange base assembly 63 of the coil frame in a direction perpendicular to the bottom of the coil frame 6; the coil terminal 7 includes a vertically arranged winding terminal 71 appearing in the winding window 64 of the coil frame and a vertically arranged lead pin 72 appearing outside the bottom of the coil frame; the winding terminal 71 and the lead pin 72 of the same coil terminal are staggered, and the winding terminal 71 is close to the inner side of the coil frame 6, and the lead pin 72 is close to the outer side of the coil frame 6.

[0049] In this embodiment, the winding terminal 71 and the lead pin 72 of the coil terminal are inserted and fixed at the staggered positions on the lower flange base assembly 63 of the coil frame; a stepped plug-in hole 632 with a step surface 630 facing downward is provided at the corresponding position on the lower flange base assembly 63 of the coil frame 6, and a stepped plug-in portion 73 with a step surface 70 facing upward is provided at the plug-in position of the coil terminal 7; the upper part 731 of the step surface 70 of the stepped plug-in portion 73 of the coil terminal 7 and the upper part 6321 of the step surface 630 of the stepped plug-in hole 632 of the lower flange base assembly 63 are clearance-fitted; the lower part 732 of the step surface 70 of the step plug-in portion 73 of the coil terminal 7 and the lower part 6322 of the step surface 630 of the step plug-in hole 632 of the lower flange base assembly 63 are interference-fitted.

[0050] In this embodiment, the normally open static spring terminal 4 and the normally closed static spring terminal 5 respectively include lead pins 43 and 53 extending to the bottom of the lower flange base assembly, and the lead pins 43 of the normally open static spring terminal and the lead pins 53 of the normally closed static spring terminal are respectively located on both sides of one end of the length of the relay, and the lead pins 72 of the two coil terminals 7 are located in the middle of one end of the length of the relay, and are staggered with the lead pins 43 and 53 of the normally open static spring terminal and the normally closed static spring terminal in the length direction of the relay.

[0051] In this embodiment, the relay also includes a yoke 8; the yoke 8 is L-shaped, and the horizontal side 81 of the L-shape of the yoke 8 is fixed to the bottom of the iron core 1, and the vertical side 82 of the L-shape of the yoke 8 is adapted to the winding window 64 side of the coil frame 6; the end of the armature 2 away from the groove is matched with the upper end of the vertical side 82 of the L-shape of the yoke; the movable spring 3 is L-shaped, and the horizontal side of the L-shape of the movable spring (including the swingable part 31) is connected to the armature 2; the vertical side 32 of the L-shape of the movable spring is fixed to the vertical side 82 of the L-shape of the yoke by laser welding; the vertical side 32 of the L-shape of the movable spring extends downward and is also provided with a movable spring lead-out foot 33.

[0052] In this embodiment, a groove 64 and a protrusion 65 are provided on one side of the lower flange base assembly 63 of the coil frame 6 corresponding to the length direction of the relay, and the protrusion 65 and the groove 64 can be matched with each other; when two identical relays are spliced ​​together, the protrusion 65 and the groove 64 of one relay are respectively connected with the groove 64 and the protrusion 65 of the other relay, and the two relays are oriented in opposite directions in the length direction.

[0053] A miniaturized PCB relay of the present invention is provided with a groove 23 in one side 21 of the armature 2 of the relay, between the fixed position corresponding to the root of the swingable part 31 of the moving spring 3 and the position corresponding to the pole surface 11 of the core 1, and a solid section 24 is provided in one side 21 of the armature from the groove 23 of the armature to the end edge of the armature, and the solid section 24 cooperates with the moving spring 3. With this structure of the present invention, when the width of the relay (i.e., corresponding to the width of the moving spring) is getting smaller and smaller, and it is necessary to increase the thickness of the armature 2 to increase the effective magnetic conductive area of ​​the armature and avoid the problem of magnetic saturation, the groove 23 can be used to reduce the weight of the armature on the basis of ensuring the effective magnetic conductive area of ​​the armature 2 to avoid the jitter generated when the normally open end contact is closed; at the same time, the solid section 24 can also be used to ensure the force arm when the normally closed end is closed, and the solid section is used to press the moving spring to ensure the pressure of the normally closed end contact when the armature is released.

[0054] A miniaturized PCB relay of the present invention adopts a groove 23 that is arranged in the shape of a long strip along the width direction of the armature 2 and runs through both sides of the width of the armature 2; the width of the groove 23, at the position corresponding to the pole surface of the iron core, falls in the area of ​​the pole surface of the iron core 1, includes the center of the pole surface of the iron core 1, and is biased in the contact direction (that is, the middle line of the width of the groove 23 is offset in the contact direction relative to the center line of the pole surface of the iron core). In this structure of the present invention, the armature groove 23 is arranged at the center of the pole shoe surface of the iron core close to the contact direction. Setting it at this position has little effect on the effective magnetic conductive area of ​​the armature 2. This is because the main magnetic conductive path S of the relay (such as Fig.14As shown in the figure, a loop is formed by the center of the core pole shoe surface and the yoke on the rear side (relative to the contact direction), and the groove 23 is biased to the front side. This can avoid the problem of armature magnetic saturation (when armature magnetic saturation occurs, it will affect the product suction).

[0055] A miniaturized PCB relay of the present invention adopts the method of inserting the normally open static spring terminal 4 and the normally closed static spring terminal 5 into the coil frame 6 from top to bottom, and the normally open static spring terminal 4 and the normally closed static spring terminal 5 are designed to have a clearance fit with the plug-in hole 621 of the upper flange 62 of the coil frame and an interference fit with the plug-in hole 631 of the lower flange base assembly 63 of the coil frame. This structure of the present invention, by using the insertion method of the static spring terminal, can facilitate the adjustment of the contact overtravel of the normally open static spring terminal 4 and the adjustment of the contact gap of the normally closed static spring terminal 5, which is conducive to the miniaturization of the relay product; by using the clearance fit with the upper flange 62 of the coil frame and the interference fit with the lower flange base assembly 63, the static spring terminal can be fixed and the generation of plastic scraps around the contact can be avoided.

[0056] A miniaturized PCB relay of the present invention adopts the method of inserting the coil terminal 7 upward from the bottom of the coil frame 6 to the lower flange base assembly 63 of the coil frame; and the winding terminal 71 and the lead pin 72 of the coil terminal 7 are staggered, and the winding terminal 71 is close to the inner side of the coil frame 6, and the lead pin 72 is close to the outer side of the coil frame 6. This structure of the present invention can reduce the length or width of the relay product by staggering the winding terminal 71 and the lead pin 72, and realize the miniaturization of the relay product, and the insertion method of the coil terminal 7 minimizes the matching area between the coil terminal 7 and the coil frame 6, which is conducive to the miniaturization of the relay product.

[0057] A miniaturized PCB relay of the present invention adopts a coil terminal 7 to set a step-type plug-in portion 73 to match the step-type plug-in hole 632 of the lower flange base assembly 63 of the coil frame, and the upper parts of the step surfaces of the two are clearance fit, and the lower parts of the step surfaces of the two are interference fit. When the coil terminal 7 is inserted upward from the bottom of the coil frame 6, the plastic chips generated by the interference fit between the coil terminal and the coil frame are just stored in the step surface of the step-type plug-in hole and will not enter the interior of the relay. In addition, the winding terminal of the coil terminal needs to be bent when winding. In order to ensure the small size of the product, it needs to be folded back after winding. Since the upward step surface of the coil terminal and the downward step surface of the coil frame are limited, the matching strength of the coil terminal and the coil frame can be ensured.

[0058] A miniaturized PCB relay of the present invention fixes the movable spring 3 and the yoke 8 by laser welding, thereby ensuring the dimensional accuracy requirement in the miniaturized relay product.

[0059] A miniaturized PCB relay of the present invention adopts a lower flange base assembly 63 of the coil frame, and a groove 64 and a convex block 65 are provided on one side corresponding to the length direction of the relay, and the convex block 65 can be matched with the groove 64. With this structure of the present invention, when two identical relays need to be spliced ​​together, the convex block and the groove of one relay can be respectively connected with the groove and the convex block of the other relay, so that the two relays are oriented in opposite directions in the length direction. In this way, the coil terminals and the static spring terminals of the two relays are located at both ends of the length of the relay, forming a staggered distribution, which is conducive to the miniaturization of the relay product.

[0060] 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 miniaturized PCB relay, comprising an iron core, an armature, a movable spring, a static spring normally open end and a static spring normally closed end; the root of the movable part of the movable spring is fixed in one side of the armature and the other side of the armature is in a corresponding matching position with the pole surface of the iron core; the movable part of the movable spring is provided with a movable contact at the end thereof and is respectively matched between the static spring normally open end and the static spring normally closed end, and the static spring normally open end is located on the side of the movable spring facing the pole surface of the iron core, and the static spring normally closed end is located on the side of the movable spring facing away from the pole surface of the iron core; characterized in that: In one side of the armature, a groove is provided between the fixed position corresponding to the root of the swingable part of the movable spring and the position where the movable contact is installed on the movable spring and corresponding to the pole surface of the iron core, so as to utilize the groove to reduce the weight of the armature on the basis of ensuring the effective magnetic conductive area of ​​the armature to avoid the jitter generated when the normally open end contact is closed; in one side of the armature, the armature also has a solid section from the groove to the terminal end edge of the armature, and the solid section cooperates with the movable spring so that when the armature is released, the solid section is used to press against the movable spring to ensure the pressure of the normally closed end contact.

2. The miniaturized PCB relay according to claim 1, characterized in that: The groove is in the shape of a long strip arranged along the width direction of the armature and runs through both sides of the width of the armature; the width of the groove, corresponding to the pole surface of the iron core, falls in the area of ​​the pole surface of the iron core, includes the center of the pole surface of the iron core, and is biased towards the contact direction.

3. The miniaturized PCB relay according to claim 1 or 2, characterized in that: The relay also includes a coil frame and a base; the coil frame is provided with an iron core mounting hole, and the axis of the iron core mounting hole of the coil frame is vertically arranged; the iron core is installed in the iron core mounting hole of the coil frame with the pole surface of the iron core facing upward; the armature is fitted above the upper flange of the coil frame, and the base and the lower flange of the coil frame are connected as a whole to form a lower flange base assembly.

4. The miniaturized PCB relay according to claim 3, characterized in that: The normally open end of the static spring is a normally open static contact, and the normally closed end of the static spring is a normally closed static contact; the relay also includes a normally open static spring terminal and a normally closed static spring terminal; the tops of the normally open static spring terminal and the normally closed static spring terminal are respectively fixedly connected to the normally open static contact and the normally closed static contact; the normally open static spring terminal and the normally closed static spring terminal are respectively inserted into the coil frame from top to bottom, so as to facilitate the normally open static spring terminal to adjust the contact overtravel and the normally closed static spring terminal to adjust the contact gap.

5. The miniaturized PCB relay according to claim 4, characterized in that: The normally open static spring terminal and the normally closed static spring terminal are respectively inserted into the upper flange of the coil frame and the lower flange base assembly of the coil frame; the upper flange of the coil frame and the lower flange base assembly of the coil frame are respectively provided with plug-in holes; the normally open static spring terminal and the normally closed static spring terminal are respectively provided with convex buds for achieving interference fit and barbs on the convex buds for preventing withdrawal after insertion at the matching position with the plug-in hole of the lower flange base assembly; the normally open static spring terminal and the normally closed static spring terminal have a clearance fit with the plug-in hole of the upper flange of the coil frame; the normally open static spring terminal and the normally closed static spring terminal have an interference fit with the plug-in hole of the lower flange base assembly of the coil frame.

6. The miniaturized PCB relay according to claim 5, characterized in that: The relay also includes two coil terminals; the two coil terminals are respectively inserted into the lower flange base assembly of the coil frame from the bottom of the coil frame in a direction perpendicular to the bottom of the coil frame; the coil terminals include a vertically arranged winding terminal appearing in the winding window of the coil frame and a vertically arranged lead-out pin appearing outside the bottom of the coil frame; the winding terminal and the lead-out pin of the same coil terminal are staggered, and the winding terminal is close to the inner side of the coil frame, and the lead-out pin is close to the outer side of the coil frame.

7. The miniaturized PCB relay according to claim 6, characterized in that: The winding terminals and lead pins of the coil terminal are inserted and fixed at the staggered positions on the lower flange base assembly of the coil frame; a step-type plug-in hole with a step surface facing downward is provided at the corresponding position on the lower flange base assembly of the coil frame, and a step-type plug-in portion with a step surface facing upward is provided at the plug-in position of the coil terminal; the upper part of the step surface of the step-type plug-in portion of the coil terminal is clearance-fitted with the upper part of the step surface of the step-type plug-in hole of the lower flange base assembly; the lower part of the step surface of the step-type plug-in portion of the coil terminal is interference-fitted with the lower part of the step surface of the step-type plug-in hole of the lower flange base assembly.

8. The miniaturized PCB relay according to claim 6, characterized in that: The normally open static spring terminal and the normally closed static spring terminal respectively include lead pins extending to the bottom of the lower flange base assembly, and the lead pins of the normally open static spring terminal and the lead pins of the normally closed static spring terminal are respectively located on both sides of one end of the length of the relay, and the lead pins of the two coil terminals are located in the middle of one end of the length of the relay, and are staggered with the lead pins of the normally open static spring terminal and the normally closed static spring terminal in the length direction of the relay.

9. The miniaturized PCB relay according to claim 3, characterized in that: The relay also includes a yoke; the yoke is L-shaped, the horizontal side of the L-shaped yoke is fixed to the bottom of the iron core, and the vertical side of the L-shaped yoke is adapted to the winding window side of the coil frame; the end of the armature away from the groove is matched with the upper end of the vertical side of the L-shaped yoke; the movable spring is L-shaped, and the horizontal side of the L-shaped movable spring is connected to the armature; the vertical side of the L-shaped movable spring is fixed to the vertical side of the L-shaped yoke by laser welding.

10. The miniaturized PCB relay according to claim 3, characterized in that: In the lower flange base assembly of the coil frame, a groove and a convex block are provided on one side corresponding to the length direction of the relay, and the convex block and the groove can be matched with each other; when two identical relays are spliced ​​together, the convex block and the groove of one relay are respectively connected with the groove and the convex block of the other relay, and the two relays are oriented in opposite directions in the length direction.

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