CN101425414B

CN101425414B - Microswitch

Info

Publication number: CN101425414B
Application number: CN200810163021XA
Authority: CN
Inventors: 郑建中; 田学会
Original assignee: Individual
Current assignee: ZHEJIANG ZHONGXUN ELECTRONICS CO Ltd
Priority date: 2008-12-05
Filing date: 2008-12-05
Publication date: 2011-11-23
Anticipated expiration: 2028-12-05
Also published as: CN101425414A

Abstract

The invention discloses a microswitch which comprises a basal cover and a base, wherein a function conversion moving mechanism of the switch is arranged in the basal cover and the base, and the function conversion moving mechanism comprises a button, a double bend, a contact bridge, a reed and a triple bend, wherein a contact bridge positioning groove is arranged on the double bend, a mounting groove is arranged on the contact bridge, and the linear contact is adopted between the double bend and the contact bridge as well as between the double bend and the triple bend. In the invention, as the linear contact is adopted between the double bend and the contact bridge of the microswitch as well as between the double bend and the triple bend, the contact areas among all hinged fulcrums always do not change, and the flowing current is more constant, thereby high temperature rise of the switch caused by large heat productivity as the current increases suddenly is avoided; in addition, the switch function action is more sensitive as the linear contact is always adopted among all hinged fulcrums of the switch, the connecting and disconnecting speed of the switch is accelerated, the arc time is shorter, and the service life of the switch can be prolonged.

Description

Sensitive switch

Technical field

The present invention relates to a kind of sensitive switch, especially be pointed out that to be applicable to by the people by actuator operation or by exciting driving member to operate to start or control the appliance switch of family expenses or similar applications electric device and other equipment.

Background technology

At present, the functional configuration of sensitive switch is by button, two curvatures, three curvatures, the contact bridge assembly, reed, straight end combination of components forms, when unclamping certain distance again with button pressed downwards or after pressing down, switch is realized the kinetic energy conversion, in the operating process of switch, two curvatures are rotated around the wring abut place that contacts with three curvatures under the pressing of button, contact bridge rotates around the wring abut place that contacts with two curvatures, switch is in the process of action, the contact situation at wring abut place is the way of contact of " line---face---line " or " face---line---face ", and this sensitive switch is not provided with cooling system.Therefore there is the shortcoming of following five aspects in traditional this sensitive switch:

1, switch is in the process of work, the wring abut contact position is because contact position follows the action of button that the contact of " line---face---line " or " face---line---face " takes place, therefore the contraction of electric current line has the phenomenon of sudden change, cause the electrodynamic repulsion force instability, contact is unreliable at the wring abut place, caloric value is big, the switch temperature rise, and switch can cause pedestal, the displacement of Ji Gai fusing causing terminal to be burnt because of temperature rise is too high;

2, make the switching function action insensitive because the line face of each wring abut contact position changes, connection and the speed that disconnects are slow, and the arc time is long, and switch life is short.

3, the heat radiation of switch only depend on each part heat conduction by surface heat loss through radiation in air, radiating rate is slow, and not with another radiating rate faster convection type on sensitive switch, utilize.

4, the contact bridge location notch on two curvatures is that upsetting pressure is shaped, the size instability, and required pressure exists, and the drift wearing and tearing are big.

5, cause the electric current instability because the line face of each wring abut contact position changes, make the rated current of switch not high, can not switch more than the 18A.

Summary of the invention

Technical problem to be solved by this invention provides a kind of sensitive switch, and its two curvature remains current stabilization with contact bridge and two curvatures with the contacting in the course of action of switch of wring abut of three curvatures.

For this reason, sensitive switch provided by the invention comprises Ji Gai and pedestal, be provided with switching function translation activity mechanism in Ji Gai and the pedestal, function translation activity mechanism comprises button, two curvatures, contact bridge, reed and three curvatures, two curvatures are provided with the contact bridge location notch, offer mounting groove on the contact bridge, between two curvatures and the contact bridge and two curvatures be always line with wring abut between three curvatures and contact.

Owing to contact for line between two curvatures of sensitive switch provided by the invention and the contact bridge and between two curvatures and three curvatures, therefore the contact area of each wring abut changes not quite all the time in the course of action of switch, therefore the electric current that flows through is comparatively constant, it is big to have avoided increasing the caloric value that causes because of electric current is unexpected, make the temperature rise of switch, and each wring abut of switch is that the line contact makes the switching function action sensitive more all the time, that connects and disconnect speeds up, arc time is shorter, can increase switch life.

Description of drawings

Fig. 1 is the structure split schematic diagram of sensitive switch provided by the invention.

Fig. 2 is the cutaway view of Fig. 1.

Fig. 3 is the structure cross-sectional schematic of sensitive switch under initial condition.

Fig. 4 is the local enlarged diagram in A place of Fig. 3.

Fig. 5 is the local enlarged diagram in B place of Fig. 3.

Fig. 6 is in the structure cross-sectional schematic under the critical condition of function conversion after button is pressed down certain distance for sensitive switch.

Fig. 7 is the local enlarged diagram in C place of Fig. 6.

Fig. 8 is the local enlarged diagram in D place of Fig. 6.

Fig. 9 is forced into structure cross-sectional schematic under the state of extreme position for sensitive switch at button.

Figure 10 is the local enlarged diagram in E place of Fig. 9.

Figure 11 is the local enlarged diagram in F place of Fig. 9.

Figure 12 is in the structure cross-sectional schematic under the critical condition of function conversion after button is returned to certain distance for sensitive switch.

Figure 13 is the local enlarged diagram in G place of Figure 12.

Figure 14 is the local enlarged diagram in H place of Figure 12.

Figure 15 is the structural representation of two curvatures among Fig. 1.

Figure 16 is the structural representation of the contact bridge among Fig. 1.

Figure 17 is the structural representation that has the pedestal of part section.

Figure 18 is the split view of pedestal and Ji Gai.

In each accompanying drawing: 1, Ji Gai, 2, pedestal, 3, button, 4, two curvatures, 5, contact bridge, 6, reed, 7, three curvatures, 8, the contact bridge location notch, 9, mounting groove, 10, the first line contact jaw, 11, first line contact seamed edge, 12, the second line contact jaw, 13, second line contact seamed edge, 14, heat radiation air channel, 15, the first heat radiation air vent hole, 16, the second heat radiation air vent hole.

Embodiment

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15, shown in Figure 16, sensitive switch provided by the invention comprises base lid 1 and pedestal 2, be provided with switching function translation activity mechanism in base lid 1 and the pedestal 2, function translation activity mechanism comprises button 3, two curvatures 4, contact bridge 5, reed 6 and three curvatures 7, two curvatures 4 are provided with contact bridge location notch 8, contact bridge location notch 8 is by the moulding of directly bending of two curvature bodies, offer between mounting groove 9, two curvatures 4 and the contact bridge 5 on the contact bridge 5 and two curvatures 4 are always line with wring abut between three curvatures 7 and contact.The end that contacts with three curvatures 7 of two curvatures 4 bending that makes progress in the present embodiment forms the first line contact jaw 10, and this first line contact jaw 10 has first line contact seamed edge 11 that contacts with three curvatures 7; An end that contacts with two curvatures 4 on the mounting groove 9 of contact bridge 5 is bent upwards and forms the second line contact jaw 12, and this second line contact jaw 12 has second line contact seamed edge 13 that contacts with two curvatures 4.

As Figure 17, shown in Figure 180, in order to reduce the temperature under the sensitive switch operating state, offer the heat radiation air channel 14 and the first heat radiation air vent hole 15 on the pedestal 2, offer the second heat radiation air vent hole 16 on the base lid 1.

Claims

1. sensitive switch, comprise Ji Gai (1) and pedestal (2), be provided with switching function translation activity mechanism in Ji Gai (1) and the pedestal (2), function translation activity mechanism comprises button (3), two curvatures (4), contact bridge (5), reed (6) and three curvatures (7), two curvatures (4) are provided with contact bridge location notch (8), offer mounting groove (9) on the contact bridge (5), it is characterized in that: between described two curvatures (4) and the contact bridge (5) and two curvatures (4) be always line with wring abut between three curvatures (7) and contact.

2. sensitive switch according to claim 1, it is characterized in that: the end that described two curvatures (4) contact with three curvatures (7) bending that makes progress forms the first line contact jaw (10), and this first line contact jaw (10) has first line contact seamed edge (11) that contacts with three curvatures (7).

3. sensitive switch according to claim 1 and 2, it is characterized in that: the mounting groove (9) of described contact bridge (5) is gone up an end that contacts with two curvatures (4) and is bent upwards the formation second line contact jaw (12), and this second line contact jaw (12) has second line contact seamed edge (13) that contacts with two curvatures (4).

4. sensitive switch according to claim 1 and 2 is characterized in that: described contact bridge location notch (8) is by the moulding of directly bending of two curvature bodies.

5. sensitive switch according to claim 3 is characterized in that: described contact bridge location notch (8) is by the moulding of directly bending of two curvature bodies.

6. sensitive switch according to claim 1 and 2 is characterized in that: offer the heat radiation air channel (14) and the first heat radiation air vent hole (15) on the described pedestal (2), offer the second heat radiation air vent hole (16) on the Ji Gai (1).

7. sensitive switch according to claim 3 is characterized in that: offer the heat radiation air channel (14) and the first heat radiation air vent hole (15) on the described pedestal (2), offer the second heat radiation air vent hole (16) on the Ji Gai (1).

8. sensitive switch according to claim 4 is characterized in that: offer the heat radiation air channel (14) and the first heat radiation air vent hole (15) on the described pedestal (2), offer the second heat radiation air vent hole (16) on the Ji Gai (1).

9. sensitive switch according to claim 5 is characterized in that: offer diffusing on the described pedestal (2)