CN212570873U - Miniaturized PCB relay - Google Patents

Abstract

The utility model discloses a miniaturized PCB relay, which comprises an iron core, an armature, a movable reed, a static spring normally open end and a static spring normally closed end; the root of the swingable part of the movable spring is fixed in one surface of the armature and the other surface of the armature and the pole surface of the iron core are in corresponding fit; the movable contact is arranged at the tail end of the swingable part of the movable spring piece and is respectively matched between the normally opened end and the normally closed end of the static spring; a groove is formed in one surface of the armature, between a root fixing position corresponding to the swingable portion of the movable spring and a movable contact of the movable spring and corresponding to a pole surface of the iron core. The utility model discloses can enough alleviate the shake problem that armature weight produced when avoiding normally open end contact closure on the basis of guaranteeing the effective magnetic conduction area of armature, can guarantee normally closed end contact pressure again to guarantee the stability of relay parameter.

Description

Miniaturized PCB relay

Technical Field

The utility model relates to a relay technical field especially relates to a miniaturized PCB relay.

Background

A PCB relay is a relay for mounting on a PCB (i.e., a printed circuit board), and the volume of the PCB relay is generally designed to be small due to a limited mounting space on the PCB. Along with the continuous promotion of relay miniaturization, the installation area of PCB relay also becomes littleer and more, and the area of armature also diminishes thereupon, for guaranteeing sufficient product suction to and for guaranteeing the effective magnetic conduction area of armature, avoid magnetic saturation, therefore need increase the thickness of armature. However, when the thickness of the armature is increased, the weight of the armature is also increased, when the weight of the armature is increased, the contact kinetic energy of the movable contact and the fixed contact is increased, and when the normally-open contact is closed, the problem of shake during attraction is easily generated, so that the electric service life of a product is influenced. In order to solve the problem of shake during product actuation, the mode that prior art adopted is directly clapping the head of armature flat in order to alleviate armature weight, but, the head of armature claps flat back, and the head of armature can be to the direction displacement of keeping away from the movable contact to the support position of movable contact spring, like this, can cause the quiet spring pressure of normally closed end to reduce to influence the stability of relay parameter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides a miniaturized PCB relay, which can not only reduce the weight of an armature on the basis of ensuring the effective magnetic conduction area of the armature so as to avoid the problem of shake generated when a normally open end contact is closed, but also ensure the contact pressure of a normally closed end so as to ensure the stability of relay parameters; on the other hand, the distribution of the components of the product can be made more compact to achieve further miniaturization of the product.

The utility model provides a technical scheme that its technical problem adopted is: a miniaturized PCB relay comprises 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 swingable part of the movable spring is fixed in one surface of the armature and the other surface of the armature and the pole surface of the iron core are in corresponding fit; the movable contact is arranged at the tail end of the swingable part of the movable spring piece and is respectively matched between the normally opened end of the static spring and the normally closed end of the static spring, the normally opened end of the static spring is positioned at one side of the movable spring piece, which faces the pole face of the iron core, and the normally closed end of the static spring is positioned at one side of the movable spring piece, which faces away from the pole face of the iron core; in one surface of the armature, a groove is arranged between the root fixed position corresponding to the swingable part of the movable spring and the movable contact of the movable spring and the position corresponding to the pole surface of the iron core, so that the weight of the armature is reduced on the basis of ensuring the effective magnetic conduction area of the armature by utilizing the groove to avoid the shake generated when the normally-opened contact is closed; and in one surface of the armature, a solid section is arranged from the groove of the armature to the tail end edge of the armature, and the solid section is matched with the movable spring piece so as to ensure the contact pressure of the normally closed end by utilizing the solid section to abut against the movable spring piece when the armature is released.

The groove is a strip-shaped groove arranged along the width direction of the armature and penetrates through two sides of the width of the armature; the width of the groove, at the pole face corresponding to the iron core, falls in the area of the pole face of the iron core, contains the center of the pole face of the iron core, and is deviated to the contact direction.

The relay further comprises a coil rack 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 arranged in the iron core mounting hole of the coil frame, and the pole surface of the iron core faces upwards; the armature fits over the upper flange of the bobbin, and the base and the lower flange of the bobbin are connected to form a lower flange base assembly.

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 comprises a normally open static spring terminal and a normally closed static spring terminal; the top parts of the normally open static spring terminal and the normally closed static spring terminal are fixedly connected with a normally open static contact and a normally closed static contact respectively; the normally open static spring terminal and the normally closed static spring terminal are respectively inserted into the coil rack from top to bottom so as to conveniently adjust the overtravel of the contact by the normally open static spring terminal and adjust the gap of the contact by the normally closed static spring terminal.

The normally open static spring terminal and the normally closed static spring terminal are respectively inserted into the upper flange of the coil rack and the lower flange base assembly of the coil rack; the upper flange of the coil rack and the lower flange base assembly of the coil rack are respectively provided with an inserting hole; the normally open static spring terminal and the normally closed static spring terminal are respectively provided with a convex bud for realizing interference fit and a barb for preventing the terminal from withdrawing after being inserted at the matching position of the terminal and the inserting hole of the lower flange base assembly; the normally open static spring terminal and the normally closed static spring terminal are in clearance fit with the plug hole of the upper flange of the coil rack; the normally open static spring terminal, the normally closed static spring terminal and the plug hole of the lower flange base assembly of the coil rack are in interference fit.

The relay further comprises two coil terminals; the two coil terminals are respectively inserted into the lower flange base assembly of the coil rack from the lower direction of the coil rack from the direction vertical to the bottom of the coil rack; the coil terminal comprises a winding terminal which is vertically arranged and appears in a winding window of the coil frame, and a lead-out pin which is also vertically arranged and appears outside the bottom of the coil frame; the winding terminals and the leading-out pins of the same coil terminal are distributed in a staggered manner, the winding terminals are close to the inner side of the coil rack, and the leading-out pins are close to the outer side of the coil rack.

The staggered positions of the winding terminals and the lead-out pins of the coil terminals are inserted and fixed at the lower flange base assembly of the coil rack; a step type jack with a downward step surface is arranged at a corresponding position of the lower flange base assembly of the coil frame, and a step type inserting part with an upward step surface is arranged at the inserting position of the coil terminal; the upper part of the step surface of the step type insertion part of the coil terminal is in clearance fit with the upper part of the step surface of the step type jack of the lower flange base assembly; the lower part of the step surface of the step type insertion part of the coil terminal is in interference fit with the lower part of the step surface of the step type jack of the lower flange base assembly.

The normally open static spring terminal and the normally closed static spring terminal respectively comprise leading-out pins extending out of the lower surface of the lower flange base assembly, the leading-out pins of the normally open static spring terminal and the leading-out pins of the normally closed static spring terminal are respectively positioned on two sides of one end of the length of the relay, and the leading-out pins of the two coil terminals are positioned in the middle of one end of the length of the relay and are in staggered distribution with the leading-out pins of the normally open static spring terminal and the normally closed static spring terminal in the length direction of the relay.

The relay further comprises a yoke; the yoke iron is L-shaped, the horizontal side of the L-shaped yoke iron is fixed with the bottom of the iron core, and the vertical side of the L-shaped yoke iron is matched with the winding window side of the coil frame; one end of the armature far away from the groove is matched with the upper end of the L-shaped vertical side of the yoke; the movable spring is L-shaped, and the horizontal side of the L-shaped movable spring is connected with the armature; the vertical side of the L shape of the movable spring is fixed with the vertical side of the L shape of the yoke by laser welding.

In the lower flange base assembly of the coil rack, a groove and a lug are also arranged on one side edge corresponding to the length direction of the relay, and the lug and the groove can be correspondingly matched; when two identical relays are spliced together, the convex block and the groove of one relay are correspondingly clamped with the groove and the convex block of the other relay respectively, and the two relays are opposite in direction of length.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses owing to adopted in the one side of the armature of relay, be equipped with the recess between the movable contact and still be corresponding to the position of the polar surface of iron core to being equipped with of movable reed at the root fixed position that corresponds to the movable reed but swing part, and in the one side of armature, the recess of armature still has entity section to the end of armature along, entity section cooperatees with the movable reed. The structure of the utility model reduces the effective magnetic conducting area of the armature through increasing the thickness of the armature when the width of the relay (corresponding to the width of the movable spring) is smaller and smaller, and can reduce the weight of the armature on the basis of ensuring the effective magnetic conducting area of the armature by utilizing the groove to avoid the shake generated when the normally open end contact is closed when avoiding the magnetic saturation problem; meanwhile, the solid section can be used for ensuring the force arm when the normally closed end is closed, and the solid section is used for abutting against the movable reed to ensure the contact pressure of the normally closed end when the armature is released.

2. The groove is a strip-shaped groove arranged along the width direction of the armature and runs through the two sides of the width of the armature; the width of the groove, at the pole face corresponding to the iron core, falls in the area of the pole face of the iron core, contains the center of the pole face of the iron core, and is deviated to the contact direction. The utility model discloses a this kind of structure, armature recess set up and lean on the contact direction at iron core pole shoe face center, set up here position, and it is very little to the effective magnetic conduction area influence of armature, and this is because the main magnetic conduction route of relay is by the yoke formation loop of iron core pole shoe face center with the rear side, and the recess is partial to the front side, can avoid like this to lead to the effective magnetic conduction area of armature to reduce because of armature increases the recess, leads to armature magnetic saturation problem (when armature magnetic saturation can influence product suction).

3. The utility model discloses owing to adopted and to normally open quiet spring terminal and the quiet spring terminal of normal close respectively from last cartridge down in the coil former to and be clearance fit between the spliced eye of the last flange that designs into and the coil former with the quiet spring terminal of normally opening, the quiet spring terminal of normal close, be interference fit between the spliced eye of the lower flange base sub-assembly of coil former. The structure of the utility model utilizes the insertion mode of the static spring terminal, can conveniently adjust the overtravel of the contact at the normally open static spring terminal, and adjust the contact clearance at the normally closed static spring terminal, thereby being beneficial to the miniaturization of the relay product; by utilizing the clearance fit with the upper flange of the coil rack and the interference fit with the lower flange base assembly, the fixation of the static spring terminal can be ensured, and the generation of plastic scraps around the contact can be avoided.

4. The utility model adopts the technical proposal that the coil terminal is inserted into the lower flange base assembly of the coil rack from the lower direction of the coil rack; the winding terminals and the leading-out pins of the coil terminals are distributed in a staggered manner, the winding terminals are close to the inner side of the coil rack, and the leading-out pins are close to the outer side of the coil rack. The utility model discloses a this kind of structure utilizes the distribution of staggering of wire winding terminal and pin-out, can reduce the size of relay product length or width, realizes the miniaturization of relay product, and the cartridge mode of coil terminal makes the cooperation area of coil terminal and coil former minimum, is favorable to the miniaturization of relay product.

5. The utility model discloses owing to adopted the coil terminal to set up the stepped plug portion and the lower flange base sub-assembly's of coil former stepped jack and cooperate, and the upper portion of step face between them is clearance fit, the lower part of step face between them is interference fit, when the coil terminal by the cartridge in the below of coil former, just accomodate the step face department at the stepped jack and can not get into inside the relay because of the produced plastics bits of coil terminal and coil former interference fit, in addition, the winding terminal of coil terminal need bend when wire-wound, for guaranteeing the product small-size, need retrace again after the wire winding, because the step face up of having the coil terminal and the step face down of coil former carry on spacingly, can guarantee the cooperation intensity of coil terminal and coil former.

6. The utility model discloses owing to adopted to adopt movable contact spring and yoke to adopt laser welding fixed mutually, can guarantee in the miniaturized relay product, to the required precision of size.

7. The utility model discloses owing to adopted in the lower flange base sub-assembly of coil former, still be equipped with a recess and a lug at a side corresponding to the length direction of relay to make lug and recess can correspond the cooperation. The utility model discloses a this kind of structure, when needs splice together two the same relays, can utilize the lug and the recess of one of them relay to correspond the joint with the recess and the lug of another relay respectively together to make two relays opposite in length direction's orientation, like this, the coil terminal of two relays is in the both ends of the length that continues to be with quiet spring terminal branch, has formed the dislocation distribution, thereby is favorable to the miniaturization of relay product.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is an exploded perspective view of an embodiment of the present invention;

fig. 3 is a schematic perspective view of an armature according to an embodiment of the present invention;

fig. 4 is a front view of an armature of an embodiment of the present invention;

fig. 5 is a schematic perspective view of two relays assembled together according to an embodiment of the present invention;

fig. 6 is a schematic perspective view (bottom up) of two relays of the embodiment of the present invention assembled together;

fig. 7 is a front view of two relays of an embodiment of the present invention assembled together;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;

FIG. 9 is a sectional view taken along line B-B of FIG. 7;

fig. 10 is a side view of two relays of an embodiment of the present invention assembled together;

FIG. 11 is an enlarged schematic view of section C of FIG. 10;

fig. 12 is a top view of two relays of an embodiment of the present invention assembled together;

fig. 13 is a bottom view of two relays of an embodiment of the present invention assembled together;

FIG. 14 is a sectional view taken along line D-D of FIG. 13;

fig. 15 is a schematic perspective view of a bobbin according to an embodiment of the present invention;

fig. 16 is a schematic perspective view (bottom up) of a bobbin according to an embodiment of the present invention;

fig. 17 is a schematic perspective view of a coil bobbin and a coil terminal according to an embodiment of the present invention;

fig. 18 is a schematic view of the mating of the coil form and the coil terminals of the embodiment of the present invention;

fig. 19 is a sectional view taken along line E-E in fig. 18.

Detailed Description

Examples

Referring to fig. 1 to 19, a miniaturized PCB relay of the present invention includes an iron core 1, an armature 2, a movable spring 3, a normally open end 41 of a static spring, and a normally closed end 51 of the static spring; the root 34 of the swingable portion 31 of the movable spring 3 is fixed in the one face 21 of the armature 2 and the other face 22 of the armature 2 is brought into a position of corresponding engagement with the pole face 11 of the iron core 1; the movable contact 30 is mounted at the end of the swingable portion 31 of the movable spring 3 (i.e., beyond the area of the armature 2) and fitted between the stationary spring normally-open end 41 and the stationary spring normally-closed end 51, respectively, with the stationary spring normally-open end 41 being on the side of the movable spring 3 facing the pole face 11 of the iron core 1 and the stationary spring normally-closed end 51 being on the side of the movable spring 3 facing away from the pole face of the iron core; a groove 23 is arranged between the root fixing position of the swingable part 31 corresponding to the movable spring and the movable contact 30 of the movable spring and the position corresponding to the pole surface 11 of the iron core in one surface of the armature 2, so that the weight of the armature is reduced by using the groove 23 on the basis of ensuring the effective magnetic conduction area of the armature 2 to avoid the shake generated when the normally-opened contacts are closed; and a solid section 24 is further arranged in one surface 21 of the armature 2 from the groove 23 of the armature 2 to the tail end edge of the armature, and the solid section 24 is matched with the movable spring 3 so as to ensure the contact pressure of the normally closed end by utilizing the solid section 24 to abut against the movable spring 3 when the armature 2 is released.

In the present embodiment, the groove 23 is a long strip shape arranged along the width direction of the armature 2 (also equivalent to the width direction of the movable spring or the width direction of the relay), and penetrates through two sides of the width of the armature 2; the width of the groove 23, at the position corresponding to the pole face 11 of the iron core 1, falls in the area of the pole face 11 of the iron core 1, contains the center of the pole face 11 of the iron core 1 and is deviated to the contact point direction.

In this embodiment, the relay further includes a bobbin 6 and a base; the coil rack 6 is provided with an iron core mounting hole 61, and the axis of the iron core mounting hole 61 of the coil rack 6 is vertically arranged; the iron core 1 is arranged in the iron core mounting hole 61 of the coil frame 6, and the pole surface 11 of the iron core 1 faces upwards; the armature 2 fits over the upper flange 62 of the bobbin 6 and the base and lower flange of the bobbin are integrally connected (e.g. injection moulded) to form a lower flange base assembly 63.

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 comprises a normally open static spring terminal 4 and a normally closed static spring terminal 5; the top parts of the normally open static spring terminal 4 and the normally closed static spring terminal 5 are bent and then fixedly connected with a normally open static contact 41 and a 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 rack 6 from top to bottom so as to facilitate the over-stroke of the normally open static spring terminal 4 to adjust the contact and the clearance of the normally closed static spring terminal 5 to adjust the contact.

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 rack and the lower flange base assembly 63 of the coil rack; the upper flange 62 of the coil rack and the lower flange base assembly 63 of the coil rack are respectively provided with inserting holes 621 and 631; the normally open static spring terminal 4 and the normally closed static spring terminal 5 are respectively provided with a convex bract 42 and a convex bract 52 for realizing interference fit and a barb for preventing the convex bract from withdrawing after being inserted at the matching position of the normally open static spring terminal and the inserting 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 in clearance fit with the plug hole 621 of the upper flange 62 of the coil rack; the normally open static spring terminal 4 and the normally closed static spring terminal 5 are in interference fit with the insertion hole 631 of the lower flange base assembly 63 of the coil rack.

In this embodiment, the relay further includes two coil terminals 7; the two coil terminals 7 are respectively inserted from the lower direction of the coil frame 6 to the lower flange base assembly 63 of the coil frame from the direction perpendicular to the bottom of the coil frame 6; the coil terminal 7 comprises a winding terminal 71 which is vertically arranged and appears in a winding window 64 of the coil frame, and a lead-out pin 72 which is also vertically arranged and appears outside the bottom of the coil frame; the winding terminals 71 and the lead-out pins 72 of the same coil terminal are distributed in a staggered manner, the winding terminals 71 are close to the inner side of the coil frame 6, and the lead-out pins 72 are close to the outer side of the coil frame 6.

In this embodiment, the winding terminals 71 and the lead pins 72 of the coil terminals are inserted and fixed at the lower flange base assembly 63 of the coil frame; a stepped jack 632 with a downward stepped surface 630 is arranged at a corresponding position of the lower flange base assembly 63 of the coil rack 6, and a stepped plug part 73 with an upward stepped surface 70 is arranged at the plug position of the coil terminal 7; the upper portion 731 of the stepped surface 70 of the stepped mating part 73 of the coil terminal 7 is in clearance fit with the upper portion 6321 of the stepped surface 630 of the stepped insertion hole 632 of the lower flange base assembly 63; the lower portion 732 of the stepped surface 70 of the stepped mating portion 73 of the coil terminal 7 is in interference fit with the lower portion 6322 of the stepped surface 630 of the stepped insertion hole 632 of the lower flange base assembly 63.

In this embodiment, the normally open static spring terminal 4 and the normally closed static spring terminal 5 respectively include lead-out pins 43 and 53 extending to the lower surface of the lower flange base assembly, the lead-out pin 43 of the normally open static spring terminal and the lead-out pin 53 of the normally closed static spring terminal are respectively located at two sides of one end of the length of the relay, and the lead-out pins 72 of the two coil terminals 7 are located in the middle of one end of the length of the relay and are in staggered distribution with the lead-out 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.

In this embodiment, the relay further includes a yoke 8; the yoke 8 is L-shaped, the L-shaped horizontal side 81 of the yoke 8 is fixed with the bottom of the iron core 1, and the L-shaped vertical side 82 of the yoke 8 is matched with the side of the winding window 64 of the coil frame 6; one end of the armature 2 far away from the groove is matched with the upper end of an L-shaped vertical side 82 of the yoke; the movable spring 3 is L-shaped, and the L-shaped horizontal side (comprising a swingable part 31) of the movable spring is connected with the armature 2; the L-shaped vertical side 32 of the movable spring is fixed with the L-shaped vertical side 82 of the yoke by laser welding; the L-shaped vertical side 32 of the movable spring plate extends downwards and is also provided with a movable spring leading foot 33.

In this embodiment, a groove 64 and a projection 65 are further disposed on one side of the lower flange base assembly 63 of the coil rack 6 corresponding to the length direction of the relay, and the projection 65 and the groove 64 can be correspondingly matched; when two identical relays are spliced together, the projection 65 and the groove 64 of one relay are correspondingly clamped together with the groove 64 and the projection 65 of the other relay respectively, and the two relays are oppositely oriented in the length direction.

The utility model discloses a miniaturized PCB relay has adopted in the one side 21 of the armature 2 of relay, be equipped with between the movable contact 30 and still be corresponding to the position of the polar surface 11 of iron core 1 to the root fixed position of the portion 31 of can rocking corresponding to movable contact 3 being equipped with movable contact, and in the one side 21 of armature, the recess 23 of armature still has entity section 24 to the end edge of armature, entity section 24 cooperatees with movable contact 3. The structure of the utility model, when the width of the relay (corresponding to the width of the movable reed) is smaller and smaller, and the thickness of the armature 2 is increased to improve the effective magnetic conduction area of the armature, so as to avoid the problem of magnetic saturation, the groove 23 can be used for reducing the weight of the armature on the basis of ensuring the effective magnetic conduction area of the armature 2 to avoid the shake generated when the normally opened end contact is closed; meanwhile, the solid section 24 can be used for ensuring the moment arm when the normally closed end is closed, and the solid section is used for abutting against the movable reed to ensure the contact pressure of the normally closed end when the armature is released.

The utility model discloses a miniaturized PCB relay, which adopts the groove 23 as a strip-shaped arranged along the width direction of the armature 2 and runs through the two sides of the width of the armature 2; the width of the groove 23 is located in the region of the pole face of the core 1 corresponding to the pole face of the core, includes the center of the pole face of the core 1, and is offset in the contact direction (i.e., the central line of the width of the groove 23 is offset in the contact direction with respect to the center line of the pole face of the core). The utility model discloses a this kind of structure, armature recess 23 sets up and leans on the contact direction at iron core pole shoe face center, set up here position, it is very little to armature 2 effective magnetic conduction area influence, this is because the main magnetic conduction route S (as shown in fig. 14) of relay is by iron core pole shoe face center and the yoke of rear side (relative contact direction) form the loop, and recess 23 is partial to the front side, can avoid increasing the recess so and lead to the effective magnetic conduction area of armature to reduce because of armature, lead to armature magnetic saturation problem (when armature magnetic saturation can influence product suction appearing).

The utility model discloses a miniaturized PCB relay has adopted and will normally open quiet spring terminal 4 and the quiet spring terminal 5 of normal close respectively from last cartridge down in the coil former 6 to and will normally open quiet spring terminal 4, the quiet spring terminal 5 of normal close design into with the coil former on be clearance fit between the spliced eye 621 of flange 62, with be interference fit between the spliced eye 631 of the lower flange base sub-assembly 63 of coil former. The structure of the utility model utilizes the insertion mode of the static spring terminal, the contact overtravel can be conveniently adjusted at the normally open static spring terminal 4, and the contact clearance can be conveniently adjusted at the normally closed static spring terminal 5, thus being beneficial to the miniaturization of the relay product; by clearance fit with the upper flange 62 of the bobbin and interference fit with the lower flange base assembly 63, not only can the fixation of the stationary spring terminal be ensured, but also the generation of plastic chips around the contacts can be avoided.

The utility model discloses a miniaturized PCB relay, which adopts the structure that the coil terminal 7 is inserted into the lower flange base assembly 63 of the coil rack from the lower direction of the coil rack 6; the winding terminal 71 and the lead-out pin 72 of the coil terminal 7 are arranged in a staggered manner, the winding terminal 71 is close to the inner side of the coil frame 6, and the lead-out pin 72 is close to the outer side of the coil frame 6. The utility model discloses a this kind of structure utilizes the distribution of staggering of wire winding terminal 71 and pin 72, can reduce the size of relay product length or width, realizes the miniaturization of relay product, and the cartridge mode of coil terminal 7 makes the cooperation area of coil terminal 7 and coil former 6 minimum, is favorable to the miniaturization of relay product.

The utility model discloses a miniaturized PCB relay, adopted coil terminal 7 to set up step grafting portion 73 and the lower flange base sub-assembly 63's of coil former stepped jack 632 and cooperate, and the upper portion of step face between them is clearance fit, the lower part of step face between them is interference fit, when coil terminal 7 is by cartridge in the below of coil former 6, just accomodate the step face department at the stepped jack and can not get into inside the relay because of the produced plastics bits of coil terminal and coil former interference fit, in addition, the winding terminal of coil terminal need bend when wire winding, for guaranteeing the product small-size, need retrace again after the wire winding, because the step face down of having coil terminal up and coil former carries on spacingly, can guarantee the cooperation intensity of coil terminal and coil former.

The utility model discloses a miniaturized PCB relay has adopted and has adopted movable contact spring 3 and yoke 8 to adopt laser welding fixed mutually, can guarantee in the miniaturized relay product, to the required precision of size.

The utility model discloses a miniaturized PCB relay has adopted in the lower flange base sub-assembly 63 of coil former, still is equipped with a recess 64 and a lug 65 at a side corresponding to the length direction of relay to make lug 65 and recess 64 can correspond the cooperation. The utility model discloses a this kind of structure, when needs splice together two the same relays, can utilize the lug and the recess of one of them relay to correspond the joint with the recess and the lug of another relay respectively together to make two relays opposite in length direction's orientation, like this, the coil terminal of two relays is in the both ends of the length that continues to be with quiet spring terminal branch, has formed the dislocation distribution, thereby is favorable to the miniaturization of relay product.

The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solutions disclosed above can be used by those skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. A miniaturized PCB relay comprises 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 swingable part of the movable spring is fixed in one surface of the armature and the other surface of the armature and the pole surface of the iron core are in corresponding fit; the movable contact is arranged at the tail end of the swingable part of the movable spring piece and is respectively matched between the normally opened end of the static spring and the normally closed end of the static spring, the normally opened end of the static spring is positioned at one side of the movable spring piece, which faces the pole face of the iron core, and the normally closed end of the static spring is positioned at one side of the movable spring piece, which faces away from the pole face of the iron core; the method is characterized in that: in one surface of the armature, a groove is arranged between the root fixed position corresponding to the swingable part of the movable spring and the movable contact of the movable spring and the position corresponding to the pole surface of the iron core, so that the weight of the armature is reduced on the basis of ensuring the effective magnetic conduction area of the armature by utilizing the groove to avoid the shake generated when the normally-opened contact is closed; and in one surface of the armature, a solid section is arranged from the groove of the armature to the tail end edge of the armature, and the solid section is matched with the movable spring piece so as to ensure the contact pressure of the normally closed end by utilizing the solid section to abut against the movable spring piece when the armature is released.

2. The miniaturized PCB relay of claim 1, wherein: the groove is a strip-shaped groove arranged along the width direction of the armature and penetrates through two sides of the width of the armature; the width of the groove, at the pole face corresponding to the iron core, falls in the area of the pole face of the iron core, contains the center of the pole face of the iron core, and is deviated to the contact direction.

3. The miniaturized PCB relay of claim 1 or 2, wherein: the relay further comprises a coil rack 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 arranged in the iron core mounting hole of the coil frame, and the pole surface of the iron core faces upwards; the armature fits over the upper flange of the bobbin, and the base and the lower flange of the bobbin are connected to form a lower flange base assembly.

4. The miniaturized PCB relay of claim 3, wherein: 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 comprises a normally open static spring terminal and a normally closed static spring terminal; the top parts of the normally open static spring terminal and the normally closed static spring terminal are fixedly connected with a normally open static contact and a normally closed static contact respectively; the normally open static spring terminal and the normally closed static spring terminal are respectively inserted into the coil rack from top to bottom so as to conveniently adjust the overtravel of the contact by the normally open static spring terminal and adjust the gap of the contact by the normally closed static spring terminal.

5. The miniaturized PCB relay of claim 4, wherein: the normally open static spring terminal and the normally closed static spring terminal are respectively inserted into the upper flange of the coil rack and the lower flange base assembly of the coil rack; the upper flange of the coil rack and the lower flange base assembly of the coil rack are respectively provided with an inserting hole; the normally open static spring terminal and the normally closed static spring terminal are respectively provided with a convex bud for realizing interference fit and a barb for preventing the terminal from withdrawing after being inserted at the matching position of the terminal and the inserting hole of the lower flange base assembly; the normally open static spring terminal and the normally closed static spring terminal are in clearance fit with the plug hole of the upper flange of the coil rack; the normally open static spring terminal, the normally closed static spring terminal and the plug hole of the lower flange base assembly of the coil rack are in interference fit.

6. The miniaturized PCB relay of claim 5, wherein: the relay further comprises two coil terminals; the two coil terminals are respectively inserted into the lower flange base assembly of the coil rack from the lower direction of the coil rack from the direction vertical to the bottom of the coil rack; the coil terminal comprises a winding terminal which is vertically arranged and appears in a winding window of the coil frame, and a lead-out pin which is also vertically arranged and appears outside the bottom of the coil frame; the winding terminals and the leading-out pins of the same coil terminal are distributed in a staggered manner, the winding terminals are close to the inner side of the coil rack, and the leading-out pins are close to the outer side of the coil rack.

7. The miniaturized PCB relay of claim 6, wherein: the staggered positions of the winding terminals and the lead-out pins of the coil terminals are inserted and fixed at the lower flange base assembly of the coil rack; a step type jack with a downward step surface is arranged at a corresponding position of the lower flange base assembly of the coil frame, and a step type inserting part with an upward step surface is arranged at the inserting position of the coil terminal; the upper part of the step surface of the step type insertion part of the coil terminal is in clearance fit with the upper part of the step surface of the step type jack of the lower flange base assembly; the lower part of the step surface of the step type insertion part of the coil terminal is in interference fit with the lower part of the step surface of the step type jack of the lower flange base assembly.

8. The miniaturized PCB relay of claim 6, wherein: the normally open static spring terminal and the normally closed static spring terminal respectively comprise leading-out pins extending out of the lower surface of the lower flange base assembly, the leading-out pins of the normally open static spring terminal and the leading-out pins of the normally closed static spring terminal are respectively positioned on two sides of one end of the length of the relay, and the leading-out pins of the two coil terminals are positioned in the middle of one end of the length of the relay and are in staggered distribution with the leading-out 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 of claim 3, wherein: the relay further comprises a yoke; the yoke iron is L-shaped, the horizontal side of the L-shaped yoke iron is fixed with the bottom of the iron core, and the vertical side of the L-shaped yoke iron is matched with the winding window side of the coil frame; one end of the armature far away from the groove is matched with the upper end of the L-shaped vertical side of the yoke; the movable spring is L-shaped, and the horizontal side of the L-shaped movable spring is connected with the armature; the vertical side of the L shape of the movable spring is fixed with the vertical side of the L shape of the yoke by laser welding.

10. The miniaturized PCB relay of claim 3, wherein: in the lower flange base assembly of the coil rack, a groove and a lug are also arranged on one side edge corresponding to the length direction of the relay, and the lug and the groove can be correspondingly matched; when two identical relays are spliced together, the convex block and the groove of one relay are correspondingly clamped with the groove and the convex block of the other relay respectively, and the two relays are opposite in direction of length.

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