CN101877284A

CN101877284A - Anti-theft switch

Info

Publication number: CN101877284A
Application number: CN2009101358111A
Authority: CN
Inventors: 胡寿金
Original assignee: Individual
Current assignee: WENZHOU LIYANG ELECTRONICS CO Ltd
Priority date: 2009-04-29
Filing date: 2009-04-29
Publication date: 2010-11-03
Anticipated expiration: 2029-04-29
Also published as: CN101877284B

Abstract

The invention relates to a switch, in particular to an anti-theft switch which comprises a base, an upper cover, a handle, a return spring, a first bus bar assembly and a second bus bar assembly, wherein the handle forms a stepped shaft shape being small on the top and big at the bottom, a large-diameter part of the handle is arranged in the inner cavity of the base and mutually matched with the inner side wall of the base through a longitudinal convex edge and a groove, and a small-diameter part of the handle forms a hexagonal prism shape and penetrates out of the upper cover; the lower end surface of the handle is fixedly provided with a contact spring; and the first bus bar assembly and the second bus bar assembly are respectively embedded in other two opposite grooves on the side wall of the base. In the switch, the extending end of the handle forms the hexagonal prism shape, and the large-diameter part and the inner side wall of the base are matched through the convex edge and the groove and move up and down; on one hand, the structure is convenient for assembling, and on the other hand, the structure has the limit effect on the handle, thereby the invalidation of the anti-theft switch, which is caused by the rotation of the handle, is avoided; meanwhile, due to the sealing effect of the upper cover, the oxidization of contact points of the contact spring with the first bus bar and the second bus bar can be effectively avoided, thereby reducing the influence of external environment.

Description

Anti-theft switch

Technical field

The present invention relates to a kind of switch, particularly relate to a kind of anti-theft switch.

Background technology

Anti-theft switch is used for the supermarket anti-theft device, and this anti-theft device is installed on the article of supermarket, does not sound all clear as article in the supermarket and promptly takes the supermarket out of, with triggering siren, plays antitheft function.Wherein the effect of this anti-theft switch is a connected sum breakage alert device in circuit control.Fig. 1 is existing anti-theft switch structural representation, as shown in Figure 1, existing anti-theft switch is mainly by base, handle 101 and spring 105 are formed, handle 101 is arranged in the base and passes the pcb board 102 of alarm, be fixed with contact spring 104 on the lower surface of handle 101, be respectively equipped with two hard contacts 103 that are used to connect the siren switch on the bottom surface of pcb board 102, spring 105 is arranged between the diapire of the bottom surface of handle 101 and base, when spring upwards resets, contact spring 104 on the handle bottom surface contacts with hard contact 103 on the pcb board bottom surface respectively, sends alarm signal so be communicated with siren.There is following shortcoming in said structure: rotate easily when 1, using owing to handle 101, thereby cause contact spring 104 with hard contact 103 position deviations it can not correctly to be reported to the police; Need guarantee that contact spring 104 is corresponding one by one with the position of hard contact 103, has strengthened assembly difficulty when 2, handle 101 assembles; 3, be subjected to the influence of external environment, the easy oxidation of contact surface of contact spring 104 and hard contact 103, thus cause product failure.

Summary of the invention

Technical problem to be solved by this invention is to solve the big problem of influence that the anti-theft switch assembly difficulty is big, can not correctly report to the police and be subjected to external environment.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of anti-theft switch, comprises base, loam cake, handle, back-moving spring and first, second bus assembly, and described base has the inner chamber that an opening makes progress; Described handle is up-small and down-big multidiameter shape, and wherein small diameter portion is hexa-prism, and the upper surface of described loam cake is provided with and the suitable through hole of handle small diameter portion outline, is fixed with contact spring on the lower surface of handle; Described back-moving spring is arranged between the diapire of handle bottom surface and base; Described loam cake buckle closure seals the inner chamber of this base on base upper surface; Described first, the second bus assembly is respectively outer surface setting-in first, the height of the plastic strip of second sheet metal and first sheet metal is less than the height of second sheet metal, first, the second bus assembly relatively is inlaid on the madial wall of base respectively, be respectively equipped with longitudinal fluting on all the other of base two madial walls, be respectively equipped with on the two relative side of the major diameter of handle part with the base madial wall on the suitable fin of groove, the small diameter portion of handle passes fin on loam cake and the handle major diameter part from bottom to top and is separately positioned in the groove on the base madial wall, one end of described contact spring keeps in touch with second bonding jumper all the time, when the step surface of handle contacted with the lower surface of loam cake, the other end of contact spring contacted with first sheet metal on the first bus assembly; The distance that moves down when handle is during greater than operating distance, and the other end of contact spring leaves first sheet metal of the first bus assembly.

On the basis of such scheme, the output of described first, second bus is branched into two binding posts respectively, and this binding post passes the upper surface of loam cake respectively.

Further, described operating distance is 0.3mm～0.9mm.

Be provided with symmetrically respectively on the two relative lateral surfaces of described handle small diameter portion and be used for avoiding alarm fixedly to use groove what false alarm took place transportation.

The present invention, the external part of handle is hexa-prism, and the major diameter part of handle cooperatively interacts by fin and groove with the madial wall of base, and said structure has made things convenient for assembling on the one hand, on the other hand handle is played position-limiting action, cause anti-theft switch to lose efficacy thereby avoid handle to rotate; Simultaneously, because the inner chamber of loam cake sealed base can effectively prevent the oxidation of contact spring and first, second bus, reduced the influence of external environment.

Description of drawings

Fig. 1 is the existing product structural representation;

Fig. 2 is a perspective view of the present invention;

Fig. 3 is a vertical view of the present invention;

Fig. 4 is the A-A profile among Fig. 3;

Fig. 5 is the B-B profile among Fig. 3.

Embodiment

Below in conjunction with accompanying drawing the present invention is made detailed explanation.

As Fig. 2～shown in Figure 5, the present invention includes base 3, loam cake 2, handle 1, back-moving spring 4 and first, second bus assembly 5,7.Described base 3 is made by PA66 type nylon material, and it has the inner chamber that an opening makes progress, the inner chamber of described loam cake 2 buckle closures on sealed base 3 on the upper surface of base 3; Described handle 1 is up-small and down-big multidiameter shape, the major diameter of this handle 1 partly is the quadrangular shape and is arranged in the inner chamber of base 3, small diameter portion is hexa-prism and passes loam cake 2, be provided with groove 11 respectively symmetrically on the two relative lateral surfaces of the small diameter portion of this handle, the handle of stopping that is used for fixing of this groove 11 can not move up and down it, be used for avoiding alarm false alarm to take place in transportation, upper edge, the lower surface axis of handle 1 is provided with blind hole and is fixed with contact spring 6, have the through hole that diameter is not less than described blind hole diameter on this contact spring 6, so that do not interfere the insertion of back-moving spring 4, the diapire of base 3 is provided with the projection that is used to install back-moving spring 4, the upper end of back-moving spring 4 is inserted in the blind hole on the handle 1, and the bottom is sleeved on the projection on base 3 diapires.

Be respectively equipped with longitudinal fluting on four madial walls of described base 3, these four longitudinal fluting across are oppositely arranged in twos.The first bus assembly 5 is inlaid with the plastic strip of first sheet metal 51 for the middle part, surface, second bus 7 can be a sheet metal, also can be inlaid with the plastic strip of second sheet metal 71 for the surface, the first bus assembly 5, second bus 7 are inlaid in respectively in two groove opposite on the base side wall, the output of first,

second bus

5,7 is branched into two binding post 51-1 and 71-1 respectively, and the upper surface that above-mentioned binding post 51-1 and 71-1 pass loam cake 2 respectively is used to be connected the switch of alarm.Be respectively equipped with on the two relative side of handle 1 with base side wall on the suitable fin of all the other two relative grooves, this fin is separately positioned in the above-mentioned groove and can moves up and down along this groove, because the length of second sheet metal 71 equates with the base inner wall height, therefore, when handle 1 moves up and down, one end of contact spring 6 keeps in touch with second sheet metal 71 all the time, when the step surface of handle 1 contacts with the lower surface of loam cake 2, the other end of contact spring 6 contacts with first sheet metal 51 on the first bus assembly 5, so be communicated with alarm; The distance that moves down when handle 1 is during greater than operating distance, and the other end of contact spring 6 leaves first sheet metal 51 of the first bus assembly, so alarm disconnects.Operating distance generally is set at 0.3mm～0.9mm.

The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.

Claims

1. anti-theft switch comprises:

Base, it has the inner chamber that an opening makes progress;

Handle is up-small and down-big multidiameter shape, and the large-diameter portion branch of this handle is arranged in the inner chamber of base, and small diameter portion passes loam cake, is fixed with contact spring on the lower surface of handle;

Back-moving spring is arranged between the diapire of handle bottom surface and base;

It is characterized in that also comprising loam cake and relatively be inlaid in first, second bus assembly on the base madial wall respectively, described loam cake buckle closure seals the inner chamber of this base on base upper surface; Described first, the second bus assembly is respectively outer surface setting-in first, the height of the plastic strip of second sheet metal and first sheet metal is less than the height of second sheet metal, the small diameter portion of described handle is hexa-prism, the upper surface of described loam cake is provided with and the suitable through hole of handle small diameter portion outline, be respectively equipped with longitudinal fluting on all the other of described base two madial walls, be respectively equipped with on the two relative side of the major diameter of described handle part with the base madial wall on the suitable fin of groove, the small diameter portion of handle passes fin on loam cake and the handle major diameter part from bottom to top and is separately positioned in the groove on the base madial wall, one end of described contact spring keeps in touch with second bonding jumper all the time, when the step surface of handle contacted with the lower surface of loam cake, the other end of contact spring contacted with first sheet metal on the first bus assembly; The distance that moves down when handle is during greater than operating distance, and the other end of contact spring leaves first sheet metal of the first bus assembly.

2. anti-theft switch as claimed in claim 1 is characterized in that the output of described first, second bus is branched into two binding posts respectively, and this binding post passes the upper surface of loam cake respectively.

3. anti-theft switch as claimed in claim 1 or 2 is characterized in that described operating distance is 0.3mm～0.9mm.

4. anti-theft switch as claimed in claim 3 is characterized in that being provided with symmetrically respectively on the two relative lateral surfaces of described handle small diameter portion and is used for avoiding alarm fixedly to use groove what false alarm took place transportation.