CN201072732Y

CN201072732Y - Minitype single group normal closing type relay

Info

Publication number: CN201072732Y
Application number: CNU2007201126375U
Authority: CN
Inventors: 王尚武; 王铁伟; 王坚敏
Original assignee: NINGBO TIANBO WEIYE ELECTRIC APPLIAINCES CO Ltd
Current assignee: NINGBO TIANBO WEIYE ELECTRIC APPLIAINCES CO Ltd
Priority date: 2007-07-26
Filing date: 2007-07-26
Publication date: 2008-06-11
Anticipated expiration: 2017-07-26

Abstract

A small size single unit normally closed relay is provided, which comprises that: in a cavity comprising a base and a shell, a static spring piece with a static contact, and a contacting part with a terminal pin drawn on the base. A coil is winded on a frame, an iron core is inserted in the frame and is fixed with a yoke iron together, and a gag bit is composed of an iron circuit integrating the spring and the yoke iron; a movable contact spring is mold into a movable contact spring group to be riveted with the gag bit into a whole body, the single movable contact is riveted in a movable contact spring hole; the base is provided with a dividing wall which separates two static spring pieces and a terminal base. One end of the yoke iron with an insulation piece is fixed on a base by a bolt, the extending end of the yoke iron is fixed on a shell by dotting glue through a through hole at the bottom of the shell, which greatly improves the stability of the yoke iron, the reliability and the media compressive strength. The relay with the structure increases the electric, creepage and penetrating insulation distance, therefore, achieving the aim of improving the media compressive strength, the media compressive strength between the single group of contact and coil, and between two single groups of contact more than 6,000 VAC.

Description

Small-sized single group normally closed type relay

Technical field

The utility model relates to a kind of miniature electro-magnetic relay, can directly be weldingly fixed on the printed substrate, also can several relays be assembled in by wiring board becomes a controller in the box, be widely used in the small-sized single group normally closed type relay in each field such as automation, household electrical appliance and Medical Devices.

Background technology

Patent No. CN01230087.X " the Very Low Clearance small-sized high-power electromagnetic relay of band divider wall ", though also provide a kind of the divider wall that increases dress projection on the base make its with the shell inboard on protruding divider wall cooperatively interact, thereby increase two groups of electrical distance and creepage distances between the contact, make dielectric withstanding voltage between contact sets greater than 2500VAC, dielectric withstanding voltage between coil and contact is greater than 5000VAC, but the dielectric withstanding voltage between single group contact of this structure can only reach 1000VAC, be that dielectric withstanding voltage all can not reach 2500VAC between Chang Kai or normally closed interlock, can't satisfy requirements of different users.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of small-sized single group normally closed type relay is provided, simple in structure, assembling good manufacturability, suitable batch production, and between single group contact and the dielectric withstanding voltage between single group contact and coil greater than 6000VAC.

The technical scheme in the invention for solving the above technical problem is: small-sized single group normally closed type relay, be included in the cavity of base and shell formation, installation is by the static contact spring piece of band fixed contact, terminal pin is pressed into the contact portion that constitutes on the base, coil is on skeleton, iron core inserts in the skeleton and is fixed into one with yoke, armature is partly formed by spring and the yoke magnetic circuit that constitutes that links into an integrated entity, described movable contact spring is injection molded into moving spring combination and rivets whole with armature, single action contact riveting is in the movable contact spring hole, described base is provided with divider wall with two static contact spring pieces, terminal pin is kept apart, one end of described yoke is screwed on base, and the elongated end of yoke passes outer casing bottom through hole point glue and is fixed on the shell.

Compared with prior art, advantage of the present utility model is: base is provided with divider wall and will imports, two static contact spring pieces of output are kept apart, also keep apart with two terminal pins, movable contact spring injection moulding with the single action contact simultaneously constitutes moving spring combination, form a break-make loop with fixed contact, when relay power, export, two static contact spring pieces of input disconnect fully, isolate, and partly isolate with magnetic circuit, this structure has all increased electric, creepage distance, penetrate insulation distance, thereby reach the purpose that improves dielectric withstanding voltage, make the dielectric withstanding voltage that reaches between single group contact and coil between single group contact greater than 6000VAC, yoke extension end points glue is fixed on the shell in addition, has increased the stability and the reliability of yoke.Also increase insulating trip on the surface of yoke and also improved dielectric withstanding voltage intensity.

Description of drawings

Fig. 1, three-dimensional exploded view of the present utility model.

Fig. 2, sectional structure schematic diagram of the present utility model.

The A-A view of Fig. 3, Fig. 2.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is further described.

Movable contact spring 12 is injection molded into moving spring combination 15, and in the through hole of single action contact 13 rivetings on movable contact spring 12, rivet 14 passes the through hole on moving spring combination 15 and the armature 16, will move spring combination 15 and armature 16 riveteds and be fixed into integral body.

One side of base 6 has the divider wall 19 of projection, and the static contact spring piece on the base 6, terminal pin jack upper and lower, left and right are separated, and has increased electrical distance, creepage distance and has penetrated the distance of insulation, thereby reached the purpose that improves dielectric withstanding voltage.

Have two static contact spring pieces 8 of fixed contact 9 and terminal pin 5 and be pressed into respectively in the jack on the base 6, and separated by divider wall 19.

Iron core 11 passes the skeleton 10 that is wound with coil 17 and the through hole on the insulating trip 4, be riveted on and form the magnetic circuit part on the yoke 3, and with screw 7 pass yoke 3 with the magnetic circuit partial fixing on base 6, coil 17 two ends lead-in wire 18 is welded on respectively on the terminal pin 5, keep apart fully with insulating trip 4 and yoke 3, spring 2 one ends are connected on the elongated end 20 of yoke 3, the other end be connected with move spring combination 15 armature that are connected 16 on, single action contact 13 is contacted with fixed contact 9, cover shell 1, the elongated end 20 of yoke 3 passes the square hole at shell 1 top and is fixed on the shell 1 with some glue, is assembled into whole relay.

During use, utilize terminal pin 5 and static contact spring piece 8 on the relay to be weldingly fixed on the wiring board, when terminal pin 5 energisings at coil 17 two ends produce magnetic field, iron core 11 is inhaled moving armature 16 and is moved, make armature near iron core 11, thereby driving the moving spring combination 15 that rivets together with armature 16 moves down, make single action contact 13 and the fixed contact on the static contact spring piece 89 on the movable contact spring 12 disconnect, isolate, make static contact spring piece 8 original normally closed conducting states become off-state, simultaneously also partly isolate disconnection, control the open close of output by the break-make of input power supply with magnetic circuit.

Claims

1. a small-sized list is organized the normally closed type relay, be included in the cavity of base (6) and shell (1) formation, installation is by the static contact spring piece (8) of band fixed contact (9), terminal pin (5) is pressed into base (6) and goes up the contact portion that constitutes, coil (17) is on skeleton (10), iron core (11) inserts in the skeleton (10) and is fixed into one with yoke (3), armature (16) is partly formed by spring (2) and yoke (3) magnetic circuit that constitutes that links into an integrated entity, it is characterized in that described movable contact spring (12) is injection molded into moving spring combination (15) and rivets whole with armature (16), single action contact (13) riveting is in movable contact spring (12) hole, described base (6) is provided with divider wall (19) with two static contact spring pieces (8), terminal pin (5) is kept apart, one end of described yoke (3) is fixed on the base (6) with screw (7), and the elongated end (20) of yoke (3) passes shell (1) bottom through-hole (21) some glue and is fixed on the shell (1).

2. small-sized single group normally closed type relay according to claim 1 is characterized in that also being glued with on the described yoke (3) insulating trip (4).