CN214428531U - Movable contact spring with double-sided contact and switch device with movable contact spring - Google Patents

Abstract

The utility model relates to an electrician's electrical apparatus field, concretely relates to movable contact spring of two-sided contact and have its switching device. The movable contact piece comprises a movable contact piece body, wherein the movable contact piece body is provided with a connecting point used for being connected with an inner key and movable contacts with silver points at the end parts, the number of the movable contacts is two, the silver points are arranged at one end of the movable contact, and the two movable contacts are respectively arranged on the left end surface and the right end surface of the movable contact piece body. The utility model discloses structure to the movable contact spring improves, redesign the mounting means of movable contact on the movable contact spring for the silver point at movable contact spring both ends is the same in the double control switch, guarantees the uniformity of movable contact side-to-side movement, improves the reliability of switch.

Description

Movable contact spring with double-sided contact and switch device with movable contact spring

Technical Field

The utility model relates to an electrician's electrical apparatus field, concretely relates to movable contact spring of two-sided contact and have its switching device.

Background

The key switch usually controls a movable contact piece to contact a static contact piece to realize conduction by pressing a key, the movable contact is arranged in the movable contact piece, in order to increase the conductivity, a silver point is also arranged on the movable contact, the existing double-control switch usually adopts a double-sided silver point structure, for example, a Chinese patent authorization publication No. CN210628117U, the authorization publication date is 2020.05.26, and a patent named as 'a novel double-sided silver point structure' discloses a novel double-sided silver point structure of the movable contact piece, a silver point body is composed of a large head end and a small head end, the large head end is formed by extrusion molding of a large head end red copper layer and a large head end silver alloy layer, the contact surfaces of the large head end red copper layer and the large head end silver alloy layer form a large head end arc surface sunken towards the large head end red copper layer, the small head end is formed by extrusion molding of a small head end red copper layer and a small head end silver alloy layer, the contact surfaces of the small head end red copper layer and the small head end silver alloy layer form a small head end arc surface sunken towards the small head end red copper layer, the large-head-end red copper layer and the small-head-end red copper layer are of an integrated structure, a planar assembly surface is formed on the surface of the small-head-end silver alloy layer, and a demolding angle smaller than 90 degrees is formed at the outer side wall of the large head end.

However, the traditional movable contact usually adopts a double-sided riveting mode, the silver point is riveted on the front side and the back side of the movable contact, if the silver points are different in size, the left and right movement of the movable contact piece is inconsistent, the performance is different, and the reliability is reduced.

SUMMERY OF THE UTILITY MODEL

The silver point difference to movable contact spring both ends on the double control switch among the prior art leads to movable contact spring side-to-side movement's uniformity poor, and the less not enough of switch reliability, the utility model aims to provide a movable contact spring of two-sided contact and have its switching device improves the structure of movable contact spring, redesigns the mounting means of movable contact on the movable contact spring for the silver point at movable contact spring both ends is the same in the double control switch, guarantees the uniformity of movable contact side-to-side movement, improves the reliability of switch.

In order to achieve the above purpose, the utility model provides a following technical scheme: the movable contact spring with the double-sided contacts comprises a movable contact spring body, wherein the movable contact spring body is provided with a connecting point used for being connected with an inner key and two movable contacts with silver points at the end parts, the silver points are arranged at one end of the movable contact spring, and the two movable contacts are respectively arranged on the left end surface and the right end surface of the movable contact spring body.

By adopting the technical scheme, the two same movable contacts are arranged on the movable contact piece body and are respectively positioned on the left end surface and the right end surface of the movable contact piece body and are arranged in a back-to-back mode, so that the two movable contacts are independent, the movable contacts are only provided with the silver point on one end surface, the consistency of the silver points is ensured, the silver point riveting is more uniform and reliable, the consistency of the left-right movement of the movable contact piece is ensured, and the reliability of the switch is improved.

The utility model discloses further set up to: the movable contact spring body is in an axisymmetric pattern, the connection points are arranged on the upper end face of the movable contact spring body, and the connection points are located on a symmetry axis of the movable contact spring body. Through this setting, the movable contact spring body can design for instance such axisymmetric figure of rectangle, hexahedron, and the tie point is main stress point, and its position lies in the symmetry axis and can guarantee that the movable contact spring body atress is even, increases the performance and the life of movable contact spring body.

The utility model discloses still further set up to: the two moving contacts form central symmetry by taking the connecting point as a center, and the installation heights of the two moving contacts are the same. Through the arrangement, when the key is pressed, the movable contacts are stressed, and the two movable contacts are arranged in such a way, so that the stress positions of the two movable contacts are also in a symmetrical relation, the consistency of the left and right movement of the movable contact pieces is improved, and the difference of pressing the inner key by a user is reduced.

The utility model discloses still further set up to: the installation height of the movable contact is smaller than that of the connection point. Through the arrangement, the moment arm of the connecting point is larger than that of the movable contact, so that the pressure transmitted to the movable contact is larger than the acting force of the connecting point, the contact pressure of the movable contact is improved on the premise of not improving the acting force, the contact performance of the movable contact is more reliable, and meanwhile, the smaller the contact resistance is, the lower the temperature rise of the switch is, and the better the reliability is.

The utility model discloses still further set up to: the movable contact comprises a fixed shaft and an end cover positioned at one end of the fixed shaft, the silver point is arranged on the outer surface of the end cover, a fixed hole is formed in the movable contact piece body, and the fixed shaft is installed in the fixed hole. Through this setting, fixed axle and fixed orifices cooperation make the movable contact piece fix on the movable contact piece body steadily, the equipment of being convenient for, the area that silver point can be arranged on the end cover is great simultaneously, does benefit to the electrically conductive reliability that improves the movable contact.

The utility model discloses still further set up to: the outer side surface of the silver point is arc-shaped, and the inner side surface of the silver point is sunken towards the end cover to form a connecting surface which is in close contact with the end cover. Through this setting, the silver point of arc surface can realize contact or separation fast, and the connection area increase of silver point can improve silver point riveted intensity moreover for the position of silver point on the movable contact is firm.

The utility model also provides a switch, including the movable contact spring of terminal, interior button and foretell double-sided contact, be equipped with the static contact on the terminal, be equipped with the driving lever on the interior button, the driving lever rotationally sets up on the tie point.

The utility model discloses further set up to: the inner key is provided with a mounting hole for mounting the shifting rod, a spring is arranged in the mounting hole, the spring is pressed between the inner key and the shifting rod, one end of the shifting rod is arranged in the mounting hole, and the other end of the shifting rod is clamped with the movable contact spring at the connecting point.

The utility model discloses still further set up to: the terminal is fixed on the base, the inner key is rotatably arranged on the base, and the panel is provided with an outer key connected with the inner key.

The utility model has the advantages that: 1) the movable contact spring body is provided with two same movable contacts which are respectively positioned on the left end surface and the right end surface of the movable contact spring body and are arranged in a back-to-back manner, so that the two movable contacts are independent, and only one end surface of each movable contact is provided with a silver point, so that the consistency of the silver points is ensured, the silver point riveting is more uniform and reliable, the consistency of the left-right movement of the movable contact spring is ensured, and the reliability of the switch is improved; 2) the installation height of the movable contact is smaller than that of the connection point, and the moment arm of the connection point is larger than that of the movable contact, so that the pressure transmitted to the movable contact is larger than the elastic force generated by the spring, the contact pressure of the movable contact is improved on the premise of not improving the spring force, the contact between the movable contact and the fixed contact is more reliable, and meanwhile, the smaller the contact resistance is, the lower the temperature rise of the switch is, and the better the reliability is.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 1 of the present invention at another viewing angle;

fig. 3 is a schematic structural view of silver dots in the present invention 2;

fig. 4 is a schematic structural diagram of embodiment 3 of the present invention;

fig. 5 is a schematic structural view of the inside of the base according to embodiment 3 of the present invention;

fig. 6 is a schematic structural view of a movable contact piece contacting a stationary contact piece on one side in embodiment 3 of the present invention;

fig. 7 is a schematic structural view of a movable contact piece contacting a stationary contact piece on the other side in embodiment 3 of the present invention;

FIG. 8 is a cross-sectional view of FIG. 7;

FIG. 9 is a schematic structural diagram of a movable contact spring in the prior art;

fig. 10 is a schematic diagram of another prior art structure from another perspective.

Reference numerals: the movable contact piece comprises a movable contact piece body 100, a connecting point 200, a movable contact 300, a fixed shaft 301, an end cover 302, a silver point 400, a panel 500, an outer key 501, a base 600, a terminal 601, a fixed contact piece 602, an inner key 603, a poking rod 604, a spring 605, a fixed contact 606 and a support 700.

Detailed Description

In the description of the present embodiment, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The invention is further described with reference to the drawings and the specific embodiments.

Example 1: as shown in figures 1 and 2 of the drawings,

a movable contact spring with double-sided contacts comprises a movable contact spring body 100, wherein the movable contact spring body 100 is provided with a connecting point 200 used for being connected with an inner key 603 and movable contacts 300 with silver contacts 400 at the end parts, the number of the movable contacts 300 is two, the silver contacts 400 are arranged at one end of each movable contact 300, the two movable contacts 300 are respectively arranged on the left end face and the right end face of the movable contact spring body 100, the two same movable contacts 300 are arranged on the movable contact spring body 100 and are respectively positioned on the left end face and the right end face of the movable contact spring body 100 and are arranged in a back-to-back mode, so that the two movable contacts 300 are independent, the movable contact 300 is also provided with the silver contacts 400 only on one end face, the consistency of the silver contacts 400 is guaranteed, the riveting of the silver contacts 400 is more uniform and reliable, the consistency of the left-to-right movement of the movable contact springs is guaranteed, and the reliability of a switch is improved.

The shape of the movable contact piece body 100 is an axisymmetric figure, and can be designed into a shape such as a rectangle or a hexahedron, the connection point 200 is arranged on the upper end face of the movable contact piece body 100, the connection point 200 is positioned on the symmetric axis of the movable contact piece body 100, the connection point 200 is a main stress action point, and the position of the connection point on the symmetric axis can ensure that the movable contact piece body 100 is stressed uniformly, so that the service performance and the service life of the movable contact piece body 100 are improved. The two movable contacts 300 form central symmetry by taking the connecting point 200 as a center, the installation heights of the two movable contacts 300 are the same, when the key is pressed, the movable contacts 300 are stressed points, and the arrangement of the two movable contacts 300 can ensure that the stressed positions of the two movable contacts 300 keep a symmetrical relation, improve the consistency of left and right movement of the movable contact pieces and reduce the difference of the key pressed by a user.

As shown in fig. 2, the installation height H2 of the movable contact 300 is less than the installation height H1 of the connection point 200, so that the moment arm of the connection point 200 is greater than the moment arm of the movable contact 300, and therefore, the pressure transmitted to the movable contact 300 is greater than the acting force of the connection point 200, and the contact pressure of the movable contact 300 is increased without increasing the acting force, so that the contact performance of the movable contact 300 is more reliable, and meanwhile, the smaller the contact resistance, the lower the temperature rise of the switch is, and the better the reliability is.

Example 2: based on the mechanism of the above embodiment, as shown in fig. 3,

the movable contact 300 comprises a fixed shaft 301 and an end cover 302 positioned at one end of the fixed shaft, the silver contact 400 is arranged on the outer surface of the end cover 302, a fixed hole is formed in the movable contact piece body 100, the fixed shaft is installed in the fixed hole, the movable contact piece is stably fixed on the movable contact piece body 100 through the matching of the fixed shaft 301 and the fixed hole, the assembly is convenient, meanwhile, the area of the silver contact 400 which can be arranged on the end cover 302 is large, and the improvement of the conductive reliability of the movable contact 300 is facilitated. The outside of silver point 400 is the arc, and the inboard of silver point 400 is towards the interior sunken connection face that forms and end cover in close contact with of end cover 302, and the silver point 400 of arc surface can realize contact or separation fast, and the connection face area of silver point 400 increases moreover, can improve silver point 400 riveted intensity for silver point 400 is firm in position on movable contact 300.

Example 3: based on the structure of the above embodiment, the present embodiment provides a switch to which the movable contact of the double-sided contact in the above embodiment is applied, as shown in fig. 4 to 8,

a switch comprises a panel 500 and a base 600, the switch also comprises a bracket 700 for mounting the panel 500, a terminal 601 is arranged on the base 600, a static contact piece 602 is arranged on the terminal 601, an inner key 603 is arranged on the base 600 in a rotating way, a shifting rod 604 is arranged on the inner key 603, a mounting hole for mounting the shifting rod 604 is arranged on the inner key 603, a spring 605 is arranged in the mounting hole, the spring 605 is arranged between the inner key 603 and the shifting rod 604 in a pressing way, one end of the shifting rod 604 is arranged in the mounting hole, the other end of the shifting rod 604 is clamped with the movable contact piece at a connecting point 200, the shifting rod 604 is arranged on the connecting point 200 in a rotating way, an outer key 501 connected with the inner key 603 is arranged on the panel 500, the inner key 603 is assembled with the shifting rod 604 into a whole through interference fit, a clamping groove is arranged on the inner key 603, the spring 605 is clamped on the inner key 603, the spring 605 is in a compressed state, the elasticity on the spring 605 is transmitted to the movable contact piece through the shifting rod 604, the movable contact piece is pressed tightly against the static contact piece 602, and the action of the movable contact piece can be realized by pressing the outer key 501, so that the contact and the separation of the movable contact piece and the static contact piece 602 are controlled.

In the switch in the embodiment, the movable contact piece is provided with two same movable contacts 300 which are respectively positioned on the left end surface and the right end surface of the movable contact piece and are arranged in a back-to-back manner, so that the two movable contacts 300 are independent, the silver point 400 is arranged on only one end surface of the movable contact 300, the consistency of the silver point 400 is ensured, the silver point 400 is riveted more uniformly and reliably, the consistency of the left-right movement of the movable contact piece is ensured, and the reliability of the switch is improved.

In the traditional movable contact spring, the movable contact spring mostly acts slowly under the action of spring force, the fixed contact 606 is arranged on the fixed contact 602, so that the movable contact 300 on the movable contact spring can not be instantly contacted or separated when contacting the fixed contact 606 or the movable contact 300 is separated from the fixed contact 606, large sparks are easily generated, the contact is ablated, the service life of the contact is influenced, and the service life of the switch is seriously influenced, meanwhile, the contact pressure between the movable contact 300 and the fixed contact 606 is related to temperature rise, the temperature rise is lower when the contact pressure is larger, the contact pressure is often increased by the traditional switch in a mode of increasing the spring force, and the pressing force of the switch is necessarily increased by adopting the method, so that the hand feeling of the switch is influenced. In addition, in the conventional movable contact spring of the prior art, as shown in fig. 9 and 10, the position H4 of the movable contact 300 is higher than the position H3 of the connection point 200, the moment arm of the movable contact 300 is larger than that of the connection point 200, and thus the pressure transmitted to the movable contact 300 is lower than the elastic force generated by the actual spring 605. With the movable contact piece in the above embodiment, since the moment arm of the connection point 200 is greater than the moment arm of the movable contact 300, the pressure transmitted to the movable contact 300 is greater than the elastic force generated by the spring 605, and on the premise of not increasing the spring force, the contact pressure of the movable contact 300 is increased, the contact between the movable contact 300 and the stationary contact 606 is more reliable, and the smaller the contact resistance is, the lower the temperature rise of the switch is, and the better the reliability is.

The above embodiments are only used for further explanation of the present invention, and it is not understood that the present invention is limited by the protection scope of the present invention, and the technical engineers in the field are right according to the above contents of the present invention.

Claims (9)

1. The movable contact spring with the double-sided contacts comprises a movable contact spring body, wherein the movable contact spring body is provided with a connecting point used for being connected with a key and a movable contact with a silver point at the end part, and the end surface of the movable contact is provided with the silver point.

2. The movable contact spring with double-sided contacts as claimed in claim 1, wherein the movable contact spring body is shaped in an axisymmetric pattern, and the connection points are provided on the upper end surface of the movable contact spring body and located on the symmetry axis of the movable contact spring body.

3. The movable contact spring of a double-sided contact as claimed in claim 1, wherein the two movable contacts are formed to be centrosymmetric with respect to the connection point, and the two movable contacts are installed at the same height.

4. A double-sided contact moving contact as claimed in claim 1, 2 or 3 wherein the mounting height of the moving contact is less than the mounting height of the contact point.

5. A moving contact of a double-sided contact as claimed in claim 1, 2 or 3, wherein the moving contact comprises a fixed shaft and an end cap at one end of the fixed shaft, the silver point is provided on an outer surface of the end cap, a fixed hole is provided on the moving contact body, and the fixed shaft is installed in the fixed hole.

6. A moving contact spring with double-sided contacts as claimed in claim 5 wherein the outer side of the silver point is arc-shaped and the inner side of the silver point is recessed into the end cap to form a connecting surface which is in close contact with the end cap.

7. A switching device, characterized in that it comprises terminals, an inner push button and a double-sided contact movable contact piece as claimed in any one of claims 1 to 6, wherein the terminals are provided with static contact pieces, the inner push button is provided with a lever, and the lever is rotatably arranged on a connection point.

8. A switching device according to claim 7, wherein the inner button is provided with a mounting hole for mounting the shift lever, a spring is provided in the mounting hole, the spring is pressed between the inner button and the shift lever, one end of the shift lever is provided in the mounting hole, and the other end of the shift lever is engaged with the movable contact piece at a connecting point.

9. A switching device according to claim 7 or 8, further comprising a face plate and a base, the terminal being fixed to the base, the inner key being rotatably arranged on the base, the face plate being provided with an outer key connected to the inner key.

Images