CN211742995U

CN211742995U - Asynchronous utensil switch of contact group break-make

Info

Publication number: CN211742995U
Application number: CN202020753976.7U
Authority: CN
Inventors: 沈鼎力
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2020-10-23
Anticipated expiration: 2030-05-09

Abstract

The utility model discloses an appliance switch with asynchronous on-off contact groups, which comprises a base; the contact sets comprise fixed contacts and movable contacts, wherein the contact sets form a first part, and the rest contact sets form a second part; the contact pitch of the individual contact sets in the second portion is greater than the contact pitch of the individual contact sets in the first portion; wherein the contact group of the second part is provided with silver contacts. When the circuit is closed, the contact group of the first part is firstly switched on, and the contact group of the second part is switched on again at intervals to form a loop; when the circuit is disconnected, the contact group of the second part is disconnected firstly, and the contact group of the first part is disconnected at intervals to form an open circuit. The thickened high-quality contacts are carried on the contact group which is contacted at the back and disconnected at the front, the common contacts are selected for other contact groups, and the on-off electric arc is borne only through the high-quality contacts, so that the performance is ensured, the number of the silver contacts is greatly saved, and the cost is reduced.

Description

Asynchronous utensil switch of contact group break-make

Technical Field

The utility model belongs to the technical field of the switch technique and specifically relates to a break-make asynchronous control's switch is related to.

Background

The switch is switched on and off, the condition that the switch is singly connected on the zero line cannot occur in use, and potential safety hazards do not exist. The contact surface between the movable contact and the fixed contact is increased, the action is reliable, the accidents of electrical equipment are reduced, the structure is simple, the reliability and the safety are high, and the electric tool is very suitable for controlling household electrical appliances or electric tools.

At present, in the switch on/off of current through two or more groups of contacts in the market, the actions of the contact groups are kept highly consistent (namely synchronous) when the switch is closed or opened. Since the metal conductor terminal is likely to generate instantaneous heat and spark at the moment of contact, so that the contact point is likely to be oxidized and electrolyzed in the multi-frequency process of use, the contact point should be enlarged and thickened. Therefore, each group of contact of the on-off switch in the prior art selects the thickened high-quality contact, and the mode causes higher production cost. How to ensure the performance to be unchanged and reduce the production cost becomes the direction of research of many manufacturers and acquaintances, but no ideal product structure or mode is seen on the market.

Disclosure of Invention

To the not enough of prior art, the utility model provides an asynchronous utensil switch of contact group break-make, when guaranteeing that the switching performance is unchangeable, but the contact cost of greatly reduced switch.

The utility model provides a technical scheme that its technical problem adopted is: an appliance switch with asynchronous on-off contact sets comprises a base; the contact sets are arranged in the base and comprise fixed contacts and movable contacts, wherein the contact sets form a first part, and the rest contact sets form a second part; the contact pitch of a single contact set in the second portion is greater than the contact pitch of a single contact set in the first portion; wherein the contact group of the second part is provided with silver contacts.

When the circuit is closed, the contact group of the first part is firstly switched on, and the contact group of the second part is switched on again at intervals to form a loop; when the circuit is disconnected, the contact group of the second part is disconnected firstly, and the contact group of the first part is disconnected at intervals to form an open circuit. Because the contact group is closed firstly, no arc damage exists (namely, no load arc exists), and the contact group is closed later, the arc damage exists (namely, load arc exists); the contact group is firstly opened to cause arc damage (namely carrying the arc), and then the contact group is opened to cause no arc damage (not carrying the arc). Therefore, the thickened high-quality contacts (namely the silver contacts) are only carried on the contact groups which are contacted later and disconnected first, the other contact groups adopt common contacts, and the arc is switched on and off only through the high-quality contacts, so that the number of the silver contacts is greatly saved while the performance is ensured, and the cost is reduced.

In the above technical solution, it is preferable that the touch screen includes a first movable contact piece, and the first movable contact piece includes a first movable contact and a second movable contact; a second movable contact piece, which comprises a third movable contact and a fourth movable contact; the first fixed contact, the second fixed contact, the third fixed contact and the fourth fixed contact are fixed on the base; the push rod is used for driving the first movable contact piece and the second movable contact piece to move; the first movable contact and the first fixed contact form a first contact group, the second movable contact and the second fixed contact form a second contact group, the third movable contact and the third fixed contact form a third contact group, and the fourth movable contact and the fourth fixed contact form a fourth contact group; wherein the contact pitch of the fourth contact group is greater than the contact pitch of the remaining contact groups. When the switch is closed, the push rod drives the first contact group, the second contact group and the third contact group to contact first, and drives the fourth contact group to contact at intervals to form a loop; when the switch is disconnected, the push rod drives the fourth contact group to release contact, and drives the first contact group, the second contact group and the third contact group to release contact at intervals to form an open circuit.

In the above technical solution, preferably, the push rod drives the first movable contact piece and the second movable contact piece to synchronously displace.

In the above technical solution, preferably, the mobile phone further includes a sliding block, which is disposed on a lower half portion of the push rod and moves along with the push rod, and the first movable contact piece and the second movable contact piece are movably disposed on the sliding block; the main return spring is arranged between the push rod and the base and drives the push rod to return; the first spring is arranged between the sliding block and the first movable contact piece and drives the first movable contact piece to return; and the second spring is arranged between the sliding block and the second movable contact piece and drives the second movable contact piece to return.

In the above technical solution, preferably, the sliding block can move a distance on the push rod.

In the above technical solution, preferably, two sides of the slider are further provided with movable limiting parts, the limiting parts can protrude from the slider or retract into the slider, a third spring is arranged between the two limiting parts, a protruding block is arranged on the base outside the slider, the protruding block is used for limiting the movement of the limiting parts, when the push rod is pushed, the limiting parts contact with the protruding block, the protruding block extrudes the limiting parts to retract inwards, and then the slider can continue to move, so that the first movable contact piece and the second movable contact piece contact with the corresponding fixed contacts.

Among the above-mentioned technical scheme, preferred, still include the switch handle, the switch handle sets up the upper end of push rod.

Among the above-mentioned technical scheme, it is preferred, still include the insurance baffle, the insurance baffle includes stiff end and expansion end, the stiff end is fixed on the push rod, the outside of expansion end is provided with the button, the button can promote the expansion end of insurance baffle to the inboard displacement of base, initial condition, when the push rod promoted downwards, the expansion end of insurance baffle with the base contacts, makes the push rod can't continue displacement downwards, makes through pressing the button the expansion end remove with the contact zone of base, this moment the push rod can continue displacement downwards.

In the above technical scheme, preferably, a fifth spring is arranged between the sliding block and the push rod, and the fifth spring is used for driving the sliding block to return.

The utility model has the advantages that: be different from traditional on-off switch's working method, the utility model discloses at the during operation, make one of them some contact group take the lead to contact earlier, make all the other contact group contact switch-on circuit afterwards. Therefore, although the electric arc generated when the other contact groups are contacted can be increased, the thickened high-quality contact is only needed to be carried on the contact group contacted at the back, the common contact is selected for the other contact groups, and the on-off electric arc is only born through the high-quality contact, so that the contact cost of the switch can be greatly reduced under the condition that the performances of instantaneous action of the switch, the durable service life of the switch, the temperature rise of the switch and the like are not changed.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic diagram of the internal structure of the present invention.

Fig. 2 is a schematic circuit diagram of the present invention.

Fig. 3 is an internal structure schematic diagram based on fig. 2 of the present invention.

Fig. 4 is a sectional view taken along a-a in fig. 1 according to the present invention.

Fig. 5 is a schematic view of the external structure of the present invention.

Fig. 6 is a schematic structural diagram of the push rod of the present invention.

In the figure, 1, a base, 2, a push rod, 31, a first fixed contact, 32, a second fixed contact, 33, a third fixed contact, 34, a fourth fixed contact, 4, a first movable contact, 41, a first movable contact, 42, a second movable contact, 5, a second movable contact, 51, a third movable contact, 52, a fourth movable contact, 6, a silver contact, 7, a sliding block, 8, a main return spring, 9, a first spring, 10, a second spring, 11, a limiting piece, 12, a third spring, 13, a lug, 14, a switch handle, 15, a safety baffle, 151, a fixed end, 152, a movable end, 16, a button, 17, a fourth spring, 18, a fifth spring, 19, a sliding groove, 20, a second limiting groove, 21, a third limiting groove and 22, a fourth limiting groove.

Detailed Description

Referring to fig. 1-6, for the specific implementation of the present invention: an appliance switch with asynchronous on-off contact sets is mainly suitable for switches in household appliances and switches on electric tools and comprises a base 1; a push rod 2; a fixed contact group fixedly installed in the base 11; the first movable contact piece 4 and the second movable contact piece 5 are driven to move by the push rod 2, the first movable contact piece 4 comprises a first movable contact 41 and a second movable contact 42, the second movable contact piece 5 comprises a third movable contact 51 and a fourth movable contact 52, the sliding block 7 is arranged on the lower half part of the push rod 2 in a sliding mode and moves along with the push rod 2, and the first movable contact piece 4 and the second movable contact piece 5 are movably arranged on the sliding block 7; the fixed contact group comprises a first fixed contact 31, a second fixed contact 32, a third fixed contact 33 and a fourth fixed contact 34, and the distance between the fourth movable contact 52 and the fourth fixed contact 34 is larger than the distance between the rest movable contacts and the fixed contact group. When the switch is closed, the push rod 2 drives the first movable contact 4 and the second movable contact 5 to synchronously displace, so that the first movable contact 41 is firstly contacted with the first fixed contact 31, the second movable contact 42 is firstly contacted with the second fixed contact 32, the third movable contact 51 is firstly contacted with the third fixed contact 33, and then the fourth movable contact 52 is contacted with the fourth fixed contact 34 to form a loop; when the switch is disconnected, the push rod 2 drives the first movable contact 4 and the second movable contact 5 to synchronously move, so that the fourth movable contact 52 and the fourth fixed contact 34 are firstly released from contact, the first movable contact 41 and the first fixed contact 31, the second movable contact 42 and the second fixed contact 32, and the third movable contact 51 and the third fixed contact 33 are immediately released from contact at intervals, and an open circuit is formed at the moment.

Because the contact group is closed firstly, no arc damage exists (namely, no load arc exists), and the contact group is closed later, the arc damage exists (namely, load arc exists); the contact group is firstly opened to cause arc damage (namely carrying the arc), and then the contact group is opened to cause no arc damage (not carrying the arc). Therefore, the silver contact 6 which can be contacted is arranged on the fourth movable contact 52 and the fourth fixed contact 34, the use frequency of the conductor is increased by arranging the silver contact 6, the contact effect is increased, and the performance of the conductor is enhanced.

Explanation for silver contacts: the silver contact is widely used as the intersection point of mutual separation and contact when the electronic appliance is opened and closed, because the metal conductor terminal is easy to generate instant heating and spark at the contact moment, the contact point is easy to generate oxidation and electrolysis in the multi-frequency process of use, the contact point is enlarged and thickened, or is made of high polymer metal (more than two materials of copper and silver), and the contact point made of the high polymer metal or the enlarged and thickened point made of the same material is called as the silver contact. The main materials used are silver, copper, iron, aluminum, etc., which generally need to be plated with silver to enhance the conductive effect and prevent oxidation.

Furthermore, in order to realize the reset of each component in the switch, the switch also comprises a main return spring 8 which is arranged between the push rod 2 and the base 1 and drives the push rod 2 to return; the first spring 9 is arranged between the sliding block 7 and the first movable contact piece 4 and drives the first movable contact piece 4 to return; and the second spring 10 is arranged between the sliding block 7 and the second movable contact piece 5 and drives the second movable contact piece 5 to return.

In order to make the first movable contact piece 4 and the second movable contact piece 5 instantaneously contact with the fixed contact group, two sides of the sliding block 7 are further provided with movable limiting pieces 11, the limiting pieces 11 can protrude out of the sliding block 7 or retract into the sliding block 7, a third spring 12 is arranged between the two limiting pieces 11, wherein a fifth spring 18 is further arranged between the sliding block 7 and the push rod 2, a convex block 13 is arranged on the base 1 outside the sliding block 7, the convex block 13 is used for limiting the movement of the limiting pieces 11, when the push rod 2 is pushed, the limiting pieces 11 are in contact with the convex block 13, at the moment, the sliding block 7 moves a short distance in a sliding groove 19 of the push rod 2, the fifth spring 18 is compressed, the convex block 13 pushes the limiting pieces 11 to retract, and when the elastic force of the fifth spring 18 is greater than the blocking force of the convex block 13 and the limiting pieces 11, the sliding block 7 moves rapidly under the acting force of the fifth spring, and realizing instant closing action of the contacts, so that the first movable contact piece 4 and the second movable contact piece 5 are contacted with the fixed contact group.

Referring to fig. 6, the push rod 2 has a specific structure, the push rod 2 includes an upper cylinder and a lower square body, the slider 7 moves on the square body, the square body is provided with a second limiting groove 20, a third limiting groove 21 and a fourth limiting groove 22, the second limiting groove 20 is longer than the third limiting groove 21, but the third limiting groove 21 is wider than the second limiting groove 22, the length of the second limiting groove 20 is the movable distance of the slider 7 on the push rod 2, the fifth spring 18 is disposed in the third limiting groove 21 and is extruded by the displacement of the slider 7 and provides return elastic force, and the fourth limiting groove 22 at the bottom of the square body is used for positioning the main return spring 8.

In order to facilitate pushing the push rod 2, the push rod further comprises a switch handle 14, and the switch handle 14 is arranged at the upper end of the push rod 2.

In order to play the insurance effect, make push rod 2 can not bulldoze at will to avoid the false start, still include safety shield 15, safety shield 15 includes stiff end 151 and loose end 152, stiff end 151 is fixed on push rod 2, the outside of loose end 152 is provided with button 16, button 16 can promote the loose end 152 of safety shield 15 to the inboard displacement of base 1, initial condition, when push rod 2 promoted downwards, the loose end 152 of safety shield 15 with base 1 contacts, makes push rod 2 can not continue the downward displacement, makes through pressing button 16 loose end 152 remove with base 1's contact zone, at this moment push rod 2 can continue the downward displacement. A fourth spring 17 abutting against the base 1 is further arranged inside the button 16, and the fourth spring 17 is used for driving the button 16 to return.

The utility model discloses a working process: while keeping pressing the button 16, the switch handle 14 is pressed downwards, so that the push rod 2 drives the slide block 7 to displace, in the process, the limiting piece 11 is contacted with the lug 13, so that the sliding block 7 stops for a moment after moving for a certain distance on the push rod 2 until the limiting piece 17 retracts inwards and slides over the lug 13, the slide block 7 is instantaneously moved downwards by the driving force of the fifth spring 18, at this time, the first movable contact 41, the second movable contact 42 and the third movable contact 51 on the slide block 7 are instantaneously contacted with the corresponding first fixed contact 31, the second fixed contact 32 and the third fixed contact 33, after a moment, the fourth movable contact 52 is also immediately contacted with the fourth fixed contact 34, and a large amount of arc is generated at the contact point of the fourth movable contact 52 with the fourth fixed contact 34, because the enlarged and thickened high-quality contact is selected at the position, the generated electric arc can be completely borne, and the circuit is communicated at the moment. When the switch handle 14 is loosened, the push rod 2 is driven by the main return spring 8 to return, the first movable contact piece 4 and the second movable contact piece 5 are driven by the first spring 9 and the second spring 10 to return respectively, and in the process of returning, instantaneous disconnection of the switch is still realized through the position relation of the limiting piece 11 and the convex block 13, so that the service life of the switch is ensured.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and the simple modification, equivalent change or modification made on the basis of the technical solution of the present invention all fall into the protection scope of the present invention. Wherein, still be in to the on-off switch who includes contact group more than 2 groups the utility model discloses an in the protection scope, it only needs to realize that partial contact group contacts earlier, and then all the other contact groups contact again (the contact group of this part sets up the high-quality contact that increases the thickening), also can realize the same beneficial effect.

Claims

1. An appliance switch with asynchronous on-off contact sets comprises a base; a plurality of contact groups installed in the base, the contact group comprises a fixed contact and a movable contact, and is characterized in that: the plurality of contact groups form a first part, and the rest plurality of contact groups form a second part; the contact pitch of a single contact set in the second portion is greater than the contact pitch of a single contact set in the first portion; wherein the contact group of the second part is provided with silver contacts.

2. An appliance switch with asynchronous make and break contact sets as claimed in claim 1, wherein: the device comprises a first movable contact piece, a second movable contact piece and a control unit, wherein the first movable contact piece comprises a first movable contact and a second movable contact;

a second movable contact piece, which comprises a third movable contact and a fourth movable contact;

the first fixed contact, the second fixed contact, the third fixed contact and the fourth fixed contact are fixed on the base;

the push rod is used for driving the first movable contact piece and the second movable contact piece to move;

the first movable contact and the first fixed contact form a first contact group, the second movable contact and the second fixed contact form a second contact group, the third movable contact and the third fixed contact form a third contact group, and the fourth movable contact and the fourth fixed contact form a fourth contact group;

wherein the contact pitch of the fourth contact group is greater than the contact pitch of the remaining contact groups.

3. An appliance switch with asynchronous make and break contact sets as claimed in claim 2, wherein: the push rod drives the first movable contact piece and the second movable contact piece to synchronously move.

4. An appliance switch with asynchronous make and break contact sets as claimed in claim 2, wherein: the first movable contact piece and the second movable contact piece are movably arranged on the sliding block;

the main return spring is arranged between the push rod and the base and drives the push rod to return;

the first spring is arranged between the sliding block and the first movable contact piece and drives the first movable contact piece to return;

and the second spring is arranged between the sliding block and the second movable contact piece and drives the second movable contact piece to return.

5. The switch of claim 4, wherein the contact sets are asynchronously switched on and off, and further comprising: the sliding block can move on the push rod for a certain distance.

6. An appliance switch with asynchronous make and break contact sets as claimed in claim 5, wherein: the two sides of the sliding block are also provided with movable limiting parts, the limiting parts can protrude out of the sliding block or retract into the sliding block, a third spring is arranged between the two limiting parts, a convex block is arranged on a base on the outer side of the sliding block and used for limiting the movement of the limiting parts, when the push rod is pushed and pressed, the limiting parts are in contact with the convex block, the convex block extrudes the limiting parts to retract inwards, then the sliding block can continue to move, and the first movable contact spring and the second movable contact spring are in contact with the corresponding fixed contacts.

7. An appliance switch with asynchronous make and break contact sets as claimed in claim 2, wherein: still include the switch lever, switch lever sets up the upper end of push rod.

8. An appliance switch with asynchronous make and break contact sets as claimed in claim 2, wherein: still include the insurance baffle, the insurance baffle includes stiff end and expansion end, the stiff end is fixed on the push rod, the outside of expansion end is provided with the button, the button can promote the expansion end of insurance baffle to the inboard displacement of base, initial condition, when the push rod promoted downwards, the expansion end of insurance baffle with the base contacts, makes the unable continuation displacement downwards of push rod, through pressing the button makes the expansion end remove with the contact zone of base, this moment the push rod can continue displacement downwards.

9. An appliance switch with asynchronous make and break contact sets as claimed in claim 6, wherein: and a fifth spring is arranged between the sliding block and the push rod and used for driving the sliding block to return.