CN221125741U - Door contact switch, door control circuit and safety door - Google Patents

Abstract

The present disclosure relates to elevator safety control, and more particularly to a door contact switch, a door control circuit, and a safety door. The door contact switch comprises a first contact piece and a second contact piece, wherein the first contact piece comprises a first contact part, and the second contact piece comprises a second contact part corresponding to the first contact part in position; the first contact surface and/or the second contact surface are/is uneven, the first contact surface is one side surface of the first contact part close to the second contact part, and the second contact surface is one side surface of the second contact part close to the first contact part. Through the concave-convex structure of the contact surface and the inclined arrangement of the contact surface in the scheme, the influence of dust on the door contact switch in the environment can be effectively reduced, and good electric contact is ensured. The thickness of the conducting layer covered by the contact surface can be reduced, the consumption of conducting layer materials is reduced, and the abrasion speed of the conducting layer can be reduced. The installation of the door contact switch is facilitated by using the line pressing spring piece. The door contact switch has simple structure and is convenient to assemble.

Description

Door contact switch, door control circuit and safety door

Technical Field

The application relates to the field of elevator safety control, in particular to a door contact switch, a door control circuit and a safety door.

Background

Door contact switches are often used in elevator doors and landing door mechanisms. The closing and opening of the door contact switch is controlled by the opening and closing of the door.

Currently, door contact switches are generally rated IP20, which only protects against entry of solid matter greater than 12.5mm in diameter. In use, dust in the environment easily invades and accumulates on the contact pieces of the door contact switch, so that the contact pieces are polluted, poor contact of the door contact switch is easily caused, normal use of the door contact switch is affected, and for example, the accumulation of dust on the contact pieces can possibly cause problems of elevator fault alarming or abnormal parking and the like.

Under the influence of environmental dust, in order to ensure the conductive effect of the door contact switch, the existing door contact switch periodically uses the rigid friction between the contact post and the contact surface of the contact switch to achieve the effect of cleaning dust, an oxide layer and a carbonization layer on the contact surface. Such rigid friction may also be caused by door machine vibration, mechanical misalignment, and mechanical redundancy.

Whereas conventional contacts use flat surfaces, thicker conductive layers are required to be provided on the contact surfaces in order to cope with the periodic forced mechanical friction of the contact beams with the contact surfaces. The conductive layer is typically silver and thicker conductive layers can result in higher costs.

Although the rigid friction against the surface of the contact sheet can exert the effect of cleaning dust, oxide layer and carbonized layer on the surface of the contact sheet, the door with low opening and closing frequency rubs against the surface of the contact sheet less frequently, resulting in a limited cleaning effect. For the door with higher opening and closing frequency, frequent rigid friction on the surface of the contact piece can cause rapid abrasion of the surface of the contact piece or the conductive layer on the surface of the contact piece, so that the stability and reliability of electric communication between the contact pieces are affected.

Therefore, the flat contact surface structure and the thicker conductive layer coating not only cause high cost, but also cannot simultaneously self-adaptively open and close the door with higher frequency and the door with lower frequency.

In addition, in the related art, when the door contact switch is connected to the door control circuit, a mode of screwing the lead is generally adopted, in the mode, an operator can complete connection of the lead and the door contact switch by means of a special tool, the installation procedure is complex, and the problems of poor contact and the like are easily caused due to the influence of the skill level of the operator and whether the correct tool is used or not. In addition, the connection stability of the screw and the wire can be influenced by too deep or too shallow screwing. The screwed wire may run the risk of coming out, so that regular maintenance of the screwed position is required to ensure stable access of the door contact switch.

Disclosure of Invention

To solve at least one of the above technical problems, the present disclosure provides a door contact switch, a gate control circuit and a safety door.

According to an aspect of the present disclosure, there is provided a door contact switch including a first contact portion and a second contact including a second contact portion corresponding to a position of the first contact portion;

The first contact surface and/or the second contact surface are/is uneven, the first contact surface is one side surface of the first contact part close to the second contact part, and the second contact surface is one side surface of the second contact part close to the first contact part.

Optionally, the first contact surface and the second contact surface are both obliquely arranged.

Optionally, the door contact switch further comprises a first supporting table, wherein the first supporting table is provided with an inclined supporting surface;

The first contact piece comprises two first contact parts and a communication part connected between the two first contact parts, and the two first contact parts are respectively fixed on the outer sides of the two inclined supporting surfaces of the first supporting table.

Optionally, the door contact switch further comprises a second insulating support table, and the second insulating support table is provided with an inclined support surface;

The number of the second contact pieces is two, and the two second contact pieces are respectively fixed on the outer sides of the two inclined supporting surfaces of the second insulating supporting table.

Optionally, the first contact surface and the second contact surface are both covered with a conductive layer.

Optionally, an elastic mechanism is further included for providing elastic support for the second contact portion.

Optionally, the elastic mechanism is an elastic support portion integrally connected with the second contact portion.

Optionally, the elastic supporting portion includes a connection piece integrally connected with the second contact portion, and a coil spring integrally connected with the connection piece, and a middle portion of the coil spring is fixed with the housing of the door contact switch.

Optionally, a coil spring mounting post is provided on the inside of the housing, the coil spring mounting post snapping into the middle of the coil spring.

Optionally, the door contact switch further includes a power connection plate electrically connected to the second contact, a wire pressing spring, and a wire electrically connected to the door control circuit, where the wire pressing spring presses the wire to make the wire contact with the power connection plate.

Optionally, the line ball shell fragment includes first shell fragment arm and connects in the second shell fragment arm of first shell fragment arm, is the angle of predetermineeing between first shell fragment arm and the second shell fragment arm, is equipped with the draw-in groove in the casing, and the draw-in groove is with first shell fragment arm and second shell fragment arm card in inboard, and the draw-in groove opens at the position that corresponds the second shell fragment arm has the wiring hole, and the wire stretches into in the wiring hole and compresses tightly through the second shell fragment arm.

According to another aspect of the present disclosure, a gate control circuit is provided, including the gate contact switch described above.

According to yet another aspect of the present disclosure, a safety door is provided, which includes the above gate control circuit.

Advantageous effects

The door contact switch provided by the embodiment of the disclosure has the following advantages:

(1) By arranging the concave-convex structure of the contact surface, dust is not easy to accumulate, and when certain accumulated dust exists on the contact surface, dust is not easy to accumulate on the convex points of the contact surface. And when the convex points on the contact surface are contacted with the other contact surface, the convex points can have the effect of extruding or shoveling dust accumulated on the other contact surface, so that the conductive effect is better. The bump based on the contact surface can realize effective electric contact, and dust effectively slides off through the inclined arrangement of the contact surface, so that dust accumulation on the contact surface is avoided. Therefore, the scheme can effectively reduce the influence of dust on the door contact switch in the environment and ensure the normal use of the contact switch.

(2) Meanwhile, the number of the convex points on the contact surface of the concave-convex structure is large, so that multi-point electric contact can be formed. The concave-convex contact surface design can significantly increase the effective contact area. The design utilizes the principle of physical geometry, and the roughness of the contact surface is increased, so that the contact can be closely attached to multiple points in the contact process, and the contact points on the concave-convex contact surface are more, thereby improving the conductivity. In contrast, two flat contacts generally need to be configured as a central protrusion, so that the contact area is smaller and the contact points are fewer.

(3) By arranging the concave-convex structure of the contact surface, the overall thickness of the conductive layer can be reduced, and the consumption of conductive layer materials is greatly reduced. The two contact surfaces have various arrangement modes: the first mode is that a single contact surface is of a concave-convex structure, and the other contact surface is of a flat structure; the second way is that both contact surfaces are of a concave-convex structure. And through setting up elastic mechanism can greatly reduced the wearing and tearing speed of conducting layer, promote door contact switch's life. In contrast, the main contact point of the two flat and central convex contact surfaces is at the center, so that the friction of the center point is high, and more conductive layer material needs to be accumulated at and near the center point. The contact surface of the concave-convex structure in the scheme forms multi-point electric contact, so that more conductive layers do not need to be stacked at a single point. Therefore, compared with the conductive layer in the prior art, the conductive layer is thinner, so that the consumption of the conductive layer material can be greatly reduced, and the cost of the conductive layer material is reduced.

(4) Through the slope setting of unsmooth contact surface, can make the dust be difficult to gather more on the contact surface to reach better electric contact's technical effect.

(5) The wire pressing spring plate is used for pressing the wire to realize the connection of the wire, the installation is simple and convenient, a special tool is not needed, a screw is not needed to be screwed, the technical requirement on an operator is low, the installation operation on the door contact switch is greatly facilitated, and the pressing connection mode also has good connection stability.

(6) In the scheme, the door contact switch is simple in structure and convenient to assemble, and the first contact piece and the second contact piece are respectively arranged in the door contact switch to realize the integral assembly of the door contact switch, so that the assembly efficiency is high.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following specification.

Drawings

The drawings are for a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:

FIG. 1 is a schematic diagram of an overall structure of a door contact switch provided in an embodiment of the present disclosure;

Fig. 2 is a schematic structural view of a first contact in a door contact switch according to an embodiment of the present disclosure;

fig. 3 is a schematic structural view of a second contact in a door contact switch according to an embodiment of the present disclosure;

Fig. 4 is a schematic structural diagram of a second contact and a second insulating support where the second contact and the second insulating support are installed according to an embodiment of the present disclosure;

Fig. 5 is a schematic structural diagram of a second contact, a power receiving plate, and a pressing spring provided in an embodiment of the disclosure;

fig. 6 is a schematic diagram of an installation structure of a crimping spring according to an embodiment of the disclosure.

Reference numerals in the specific embodiments are as follows:

A first contact 100; a first contact portion 110; a first contact surface 111; a second connection hole 112; a communication section 120; the first connection hole 121, the second contact 200; a second contact portion 210; a second contact surface 211; a transition 212; a first support table 300; a second insulating support 400; a coil spring mounting post 500; a power board 600; a first fixing hole 610; a second fixing hole 620; a wire pressing spring 700; a first spring arm 710; a second spring arm 720; a card slot 800; a wire hole 810; a wire withdrawal hole 820; contact posts 900.

Detailed Description

Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

All technical terms used herein have the same meaning as commonly understood by one skilled in the art to which the application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the application, the term "at least one" refers to one or more, and "a plurality" refers to more than two (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

Fig. 1 shows a schematic diagram of an overall structure of a door contact switch according to an embodiment of the present disclosure. Fig. 2 is a schematic structural diagram of a first contact in a door contact switch according to an embodiment of the present disclosure, and fig. 3 is a schematic structural diagram of a second contact in a door contact switch according to an embodiment of the present disclosure.

As shown in fig. 1, 2, 3, the door contact switch includes a first contact 100 and a second contact 200, the first contact 100 including a first contact 110, the second contact 200 including a second contact 210 corresponding to the first contact 110;

The first contact surface 111 and/or the second contact surface 211 are/is concave-convex, the first contact surface 111 is a side surface of the first contact portion 110 close to the second contact portion 210, and the second contact surface 211 is a side surface of the second contact portion 210 close to the first contact portion 110.

The door contact switch can be connected to the door control circuit, and the door contact switch is controlled to be disconnected when the door is opened, so that the door control circuit is disconnected; and when the door is closed, the door contact switch is controlled to be communicated, so that the door control circuit is communicated.

As an example, the second contact 200 may be fixedly disposed, and the first contact 100 may be moved toward the second contact 200 by the driving of the door and finally contact the second contact 200.

The side surface of the first contact portion 110 for contacting the second contact portion 210 may be referred to as a first contact surface 111, and the side surface of the second contact portion 210 for contacting the first contact portion 110 may be referred to as a second contact surface 211.

At least one of the first contact surface 111 and the second contact surface 211 may be provided in an uneven shape. As an example, one of the first contact surface 111 and the second contact surface 211 may be provided as an uneven shape, and the other may be provided as a flat surface, at which time the uneven shape may still form multi-point electrical contact when in contact with the flat surface and avoid the influence of dust, enhancing the conductive effect. As another example, the first contact surface 111 and the second contact surface 211 may each be provided in an uneven shape. At the moment, when the two concave-convex surfaces are contacted, multi-point electric contact can be formed, the influence of dust is avoided, and the electric conduction effect is enhanced. The above-described uneven shape means that a plurality of points on the first contact surface 111 or the second contact surface 211 are convex at one point adjacent to the concave point, and concave at another point adjacent to the convex point.

As an example, the concavity and convexity of the contact surface may be achieved by a concavity and convexity texture, which may include, but is not limited to, wavy, zigzagged, etc. The convexity and concavity of the contact surface may also be achieved by a plurality of independent bumps, and the shape of the bumps may include, but is not limited to, cone, disc, truncated cone, cylinder, etc. The arrangement of the bumps may include, but is not limited to, parallel arrangement, lattice arrangement, custom shape arrangement, and the like. Regardless of the texture pattern and distribution, a plurality of bumps are formed on the first contact surface 111 or the second contact surface 211 for forming a multi-point electrical contact.

If the first contact surface 111 and the second contact surface 211 are both provided as flat surfaces, the flat contact surfaces are prone to dust accumulation, and the accumulated dust is prone to spread over the entire contact surfaces, constituting a dust layer. When the first contact surface 111 and the second contact surface 211 are in contact, poor contact may be caused due to the influence of the dust layer. In this case, the contact surface is provided with the concave-convex shape, so that dust is accumulated in the concave groove of the concave-convex contact surface, and is not accumulated in the convex point. The convex points can have the effect of extruding or shoveling dust accumulated at the corresponding points of the other contact surfaces. So that the contact surface can achieve good electrical contact based on the bumps.

Furthermore, the contact surface of the relief structure can be adapted irrespective of whether the rigid friction between the first contact surface 111 and the second contact surface 211 is high frequency or low frequency. For the concave-convex structure with low-frequency friction, dust is not easy to accumulate on the salient points, and the salient points are not easy to wear; for the bump structure with high-frequency friction, the heights of the bumps are not strictly the same (for example, the bumps are slightly different due to processing precision), so that after the coating of the conductive layer of the higher bump is worn, the conductive layer of the lower bump still closely abuts against the opposite contact surface, and good conductivity can be achieved.

In addition, the contact surface is configured to be uneven, so that when the first contact surface 111 contacts with the second contact surface 211, the contact surface is actually contacted with the protruding points in the uneven structure, so that the contact area between the first contact surface 111 and the second contact surface 211 is greatly reduced, the pressure applied to the protruding points is correspondingly increased, the friction force applied to the protruding points is also increased, and even if dust is accumulated on the protruding points, the larger friction force can help to remove the accumulated dust on the protruding points, so as to ensure the contact effect.

In this solution, the concave-convex design of the first contact surface 111 and/or the second contact surface 211 makes the contact surface have bumps and grooves, which is not easy to accumulate dust. Even if dust is accumulated, the dust is not easy to accumulate on the convex points of the contact surface, the effective electric contact of the contact surface can be realized based on the convex points of the contact surface, the good contact of the door contact switch is ensured, and the normal use of the contact switch is ensured.

In this case, the electrical contact between the first contact 100 and the second contact 200 is mainly realized through the bumps in the concave-convex structure, the overall thickness of the conductive layer can be reduced by arranging the concave-convex structure, and the thickness of the conductive layer corresponding to the groove part in the concave-convex structure is also smaller.

In an alternative embodiment of the present disclosure, the first contact surface 111 and the second contact surface 211 are both disposed obliquely. Through the slope setting of unsmooth contact surface, can make the dust be difficult to gather more on the contact surface to reach better electric contact's technical effect.

The first contact surface 111 and the second contact plate are both obliquely arranged, so that dust is not easy to accumulate on the inclined contact surface under the action of gravity, and the inclined contact surface is also easy to slide down and/or be extruded down, so that good contact of the door contact switch can be ensured, and normal use of the contact switch is ensured.

As an example, the inclination angles of the first contact surface 111 and the second contact surface 211 need to correspond, so that the first contact surface 111 and the second contact surface 211 can be stably attached, and good electrical contact between the contact surfaces is ensured.

The inclination angles of the first contact surface 111 and the second contact surface 211 can be reasonably set according to actual needs. If the inclination angle is too small, the dust can not slide off easily; if the inclination angle is too large, the smooth fitting of the first contact surface 111 and the second contact surface 211 is affected. As an example, the inclination angle of the first contact surface 111 and the second contact surface 211 may be in the range of 0 ° -90 ° from the horizontal plane. As an example, the inclination angle may be 0 degrees, i.e. not inclined, and the concave-convex structure of the contact surface alone still can achieve good conductive effect. As an example, the first contact surface 111 and the second contact surface 211 may be inclined at an angle of 40 ° -60 ° from the horizontal.

In this scheme, through the slope setting of contact surface, make the effective landing of dust, avoid the deposition on the contact surface, through the concave-convex structure of contact surface for the dust is difficult for piling up, and also can make when the contact surface exists certain deposition, make the dust also be difficult for piling up on the bump of contact surface, can realize effective electrical contact based on the bump of contact surface. Through combining concave-convex structure of the contact surface and the inclined arrangement of the contact surface, the influence of dust on the door contact switch in the environment can be effectively reduced, and the normal use of the contact switch is ensured.

In an alternative embodiment of the present disclosure, the door contact switch further includes a first support table 300, where the first support table 300 is provided with an inclined support surface;

The first contact 100 includes two first contact portions 110 and a communication portion 120 connected between the two first contact portions 110, and the two first contact portions 110 are respectively fixed to outer sides of two inclined support surfaces of the first support table 300.

In an alternative embodiment of the present disclosure, if the first contact 100 does not require a support stand, the first contact 100 itself may be rigid, such as may be formed to mate with the second contact 200.

When the first contact 100 is in contact with the second contact 200, the electrical conduction effect may be achieved. The supporting table is not needed, and certain product cost can be saved.

In an alternative embodiment of the present disclosure, the door contact switch further includes a second insulating support 400, where the second insulating support 400 is provided with an inclined support surface;

When the second contact portion 210 is pressed by the corresponding portion of the first contact, the second contact portion 210 and the support table perform a small-amplitude linear motion in the switch together because the second contact portion 210 is supported by the support table. The support table is connected to the second contact part 210 to perform a linear motion together, and the linear motion is limited by the elastic force of the coil spring, so that the motion range of the second contact part 210 is limited to a small range.

In an alternative embodiment of the present disclosure, the second contact 200 may be suspended in the air by its own rigidity after the coil spring portion of the second contact is secured, if the second contact does not require a support stand. When the second contact piece is contacted with the first contact piece, the electric conduction effect can be finished;

When the second contact 200 is not supported, the second contact portion 210 of the second contact 200 is suspended in the air. When the second contact portion 210 is pressed by the corresponding portion of the first contact, since the second contact portion 210 is not supported by a support table, the second contact portion 210 moves in an arc in the air around the center of the coil spring due to its own rigidity and elasticity, but the implementation effect is not as good as that with a support table. The supporting table is not needed, and certain product cost can be saved.

In an alternative embodiment of the present disclosure, the number of the second contacts 200 is two, and two of the second contacts 200 are electrically isolated from each other. The two second contact portions 210 are respectively fixed to the outer sides of the two inclined support surfaces of the second insulating support 400; at this time, the number of the first contacts 100 mated with the two second contacts 200 is one.

The two second contacts 200 may be separately provided, and the two second contacts 200 are respectively connected to terminals of the gate control circuit, and are electrically isolated from each other. When the first contact 100 is not in contact with the second contact 200, the gate is opened. When the first contact 100 is in contact with the second contact 200, the gate is turned on.

In an alternative embodiment of the present disclosure, the number of the second contacts 200 is an even number, and the second contacts 200 are electrically isolated from each other. The two second contact portions 210 are respectively fixed to the outer sides of the two inclined support surfaces of the second insulating support 400; at this time, the number of the first contacts 100 mated with the even number of the second contacts 200 is half the number of the second contacts 200.

In the embodiment of the present application, two second contacts 200 may be located on two sides of the second insulating support. The second contact 200 located at one side of the second insulating support platform may further integrate a plurality of sub second contacts, where each sub second contact may be in a parallel relationship and connected to the gate circuit respectively. Any one of the sub-second contact pieces can be provided with a sub-second contact piece which is arranged symmetrically on the opposite side of the second insulating support table, and the sub-second contact pieces and the sub-second contact piece form a sub-second contact piece group. The first contact 100 may also be formed by a plurality of sub-first contacts electrically isolated from each other, and each sub-first contact may be disposed corresponding to one sub-second contact group, and the electrical connection of two sub-second contacts in the corresponding sub-second contact group may be controlled by contacting the sub-first contact with the two sub-second contacts.

In an alternative embodiment of the present disclosure, the first contact 100 includes two first contact portions 110, where the two first contact portions 110 are disposed corresponding to the second contact portions 210 of the two second contacts 200, respectively, and the communication portion 120 in the middle of the first contact 100 is used to electrically communicate the two first contact portions 110. When the first contact 100 is in contact with the two second contacts 200, the first contact 100 is able to communicate the two second contacts 200, thereby enabling the gate to communicate.

Referring to fig. 1 and 2, the first supporting table 300 is used to provide fixing and supporting for the first contact 100, and the first supporting table 300 may provide two inclined supporting surfaces, so that the first contact portion 110 of the first contact 100 can be obliquely fixed to the inclined supporting surfaces, thereby implementing the oblique arrangement of the first contact surface 111. The first contact 100 may be provided with a first connection hole 121 on the communication portion 120 and a second connection hole 112 on the outer side of the first contact portion 110 for fixing the first contact 100 to the first support table 300.

As an example, the first support 300 may be fixedly connected to the contact post 900, and when the door moves from the open state to the closed state, the door contacts the contact post 900 and presses the contact post 900, so that the contact post 900 moves, the contact post 900 drives the first support 300 and the first contact 100 to move toward the second contact 200, and finally, the first contact 100 contacts the second contact 200. When the door moves from the closed state to the open state, the reset mechanism disposed on the upper portion of the first supporting platform 300 can drive the first supporting platform 300 and the contact post 900 to reset, so that the first contact 100 and the second contact 200 are restored to the non-contact state. The reset mechanism may be a spring, etc., and is not limited in this case.

The second insulating support 400 is located between the two second contacts 200, and provides fixing and supporting for the two second contacts 200, and the second insulating support 400 is made of an insulating material, so as to ensure electrical isolation between the two second contacts 200. The second insulating support 400 may provide two inclined support surfaces so that the second contact portions 210 of the two second contacts 200 can each be obliquely fixed to the inclined support surfaces, thereby achieving the inclined arrangement of the second contact surfaces 211.

Fig. 4 is a schematic structural diagram of a second contact and a second insulating support platform according to an embodiment of the disclosure.

As shown in fig. 4, the cross section of the second insulating support 400 may be approximately trapezoidal, and the inclined support surfaces at both sides of the second insulating support 400 are inclined toward the obliquely lower direction, so that the contact portions of the two second contact surfaces 211 are also inclined toward the obliquely lower direction, and dust on the second contact surfaces 211 may slide down the inclined support surfaces to the outside of the second insulating support 400, so that the dust sliding down from the second contact surfaces 211 may not affect the normal contact of the first contact 100 with the second contact 200.

Referring to fig. 3 and 4, the second contact portion 210 of the second contact piece 200 is obliquely disposed, a bent transition portion 212 is formed on the second contact piece 200 at a position near the second contact portion 210, and the second insulating support table 400 may be provided with a limit groove corresponding to the shape of the transition portion 212, so that the transition portion can be fixed in the limit groove, and so that the second contact portion 200 can be obliquely disposed and fixed above the inclined support surface of the second insulating support table 400.

In an alternative embodiment of the present disclosure, both the first contact surface 111 and the second contact surface 211 are covered with a conductive layer.

The conductive layer may be made of a good conductive material to ensure good conductivity of the contact, for example, a silver conductive layer may be used.

Specifically, the first contact 100 and the second contact 200 may have a conductive layer on a surface thereof that contacts the first contact as a contact surface, and a concave-convex structure may be provided on the conductive layer.

In an alternative embodiment of the present disclosure, the first contact surface 111 and/or the second contact surface 211 are free of conductive layers. Because the first contact surface 111 and/or the second contact surface 211 are/is made of conductive material, and the first contact surface 111 and/or the second contact surface 211 are/is structured, good conductive effect can be ensured.

In this case, the electrical contact between the first contact 100 and the second contact 200 is mainly realized through the bumps in the concave-convex structure, the overall thickness of the conductive layer can be reduced by arranging the concave-convex structure, and the thickness of the conductive layer corresponding to the groove part in the concave-convex structure is also smaller.

In an alternative embodiment of the present disclosure, the door contact switch further includes an elastic mechanism for providing elastic support to the second contact portion 210.

Wherein the elastic mechanism is capable of providing support for the second contact portion 210 while providing elastic cushioning for the second contact portion 210.

Due to vibration, mechanical deviation, redundancy of mechanical action, etc. of the door machine, the movement of the first contact 100 may exceed a preset stroke, which may cause rigid friction between contacts of a conventional door contact switch, and frequent rigid friction may cause rapid abrasion of the contacts or conductive layers on the surfaces of the contacts, affecting stability and reliability of electrical communication between the contacts.

In this scheme, the elastic mechanism can provide elastic buffering for the second contact portion 210 for when the first contact portion 110 moves to beyond the stroke of predetermineeing, can carry out elastic buffering to the second contact portion 210 through the elastic mechanism, avoid taking place the rigidity friction between first contact portion 110 and the second contact portion 210, avoid causing the quick wearing and tearing of contact or contact surface conductive layer, guarantee the stability and the reliability of electric intercommunication between the contact.

In the scheme, the abrasion speed of the conductive layer can be greatly reduced by arranging the elastic mechanism, and the service life of the door contact switch is prolonged. Meanwhile, the abrasion speed of the conductive layer is greatly reduced, and the service life of the door contact switch can be guaranteed by using a thinner conductive layer, so that the conductive layer in the scheme is thinner than that in the prior art, the consumption of conductive layer materials can be greatly reduced, and the cost of the conductive layer materials is reduced.

In an alternative embodiment of the present disclosure, the elastic mechanism is an elastic support portion integrally connected with the second contact portion 210.

The elastic mechanism may be an elastic supporting portion integrally connected with the second contact portion 210, which is equivalent to integrating an elastic supporting function on the second contact 200, and compared with the case that the elastic mechanism is independently arranged to provide elastic supporting, the structure of the door contact switch is simplified, and the door contact switch is more convenient to assemble without independently installing the elastic mechanism.

In an alternative embodiment of the present disclosure, the elastic support portion includes a connection piece 220 integrally connected with the second contact portion 210, and a coil spring 230 integrally connected with the connection piece 220, and a middle portion of the coil spring 230 is fixed to a housing of the door contact switch.

As shown in fig. 2 and 3, the elastic support portion may specifically include a connection piece 220 and a coil spring 230, wherein the connection piece 220 is used to integrally connect with the second contact portion 210, and the coil spring 230 is fixed to the housing of the door contact switch and provides elasticity.

In an alternative embodiment of the present disclosure, a coil spring mounting post 500 is provided on the inside of the housing, and the coil spring mounting post 500 snaps into the middle of the coil spring.

Wherein, the coil spring mounting post 500 can be arranged on the inner side of the shell, and the coil spring mounting post 500 can be integrally injection molded with the shell. The middle portion of the coil spring 230 is secured to the housing by a coil spring mounting post 500 so that the coil spring can provide resilient support for the second contact portion 210.

In this case, the second contact 200 is integrally connected with the coil spring 230, so that the second contact 200 has elasticity, and compared with the case that the elastic mechanism is independently arranged to provide elastic support, the structure of the door contact switch is simplified, and the elastic mechanism is not required to be independently installed, so that the second contact 200 is only required to be directly installed, and the assembly of the door contact switch is facilitated.

In the present case, the main components of the door contact switch are the first contact 100 and the second contact 200, so that the structure is simplified. When the door contact switch is assembled, the first contact piece 100 and the second contact piece 200 are respectively arranged in the shell, so that the door contact switch can be integrally assembled, the door contact switch in the case has high assembly efficiency, and the production efficiency of the door contact switch is improved.

In this case, the second contact 200 is integrally connected with the coil spring 230, so that the second contact 200 has elasticity, and compared with the case that the elastic mechanism is independently arranged to provide elastic support, the structure of the door contact switch is simplified, and the elastic mechanism is not required to be independently installed, so that the second contact 200 is only required to be directly installed, and the assembly of the door contact switch is facilitated.

In an alternative embodiment of the present disclosure, the door contact switch further includes a power receiving plate 600 electrically connected to the second contact 200, a wire pressing spring 700, and a wire electrically connected to the door control circuit, where the wire pressing spring 700 presses the wire, so that the wire contacts the power receiving plate 600.

The conductive wire can be used as a gate contact switch to be connected to the access terminal of the gate control circuit, and the conductive wire needs to be electrically connected with the second contact 200. The electrical connection board 600 is electrically connected to the second contact 200, and the electrical connection board 600 is used for establishing electrical connection with the wires.

The adoption line ball shell fragment 700 compresses tightly the wire in this case for the wire contacts with electric plate 600, has realized the access to the wire, compares the mode that adopts screw tightening to insert the wire in current scheme, only needs to use line ball shell fragment 700 to compress tightly the wire in the present case and can realize the access of wire, simple installation, and need not specialized tool, and lower to operating personnel's technical requirement, very big convenience has also had better connection stability to door contact switch's installation operation, and the mode of compressing tightly the connection.

In an alternative embodiment of the disclosure, the wire pressing spring 700 includes a first spring arm 710 and a second spring arm 720 connected to the first spring arm 710, a preset angle is formed between the first spring arm 710 and the second spring arm 720, a clamping groove 800 is disposed in the housing, the clamping groove 800 clamps the first spring arm 710 and the second spring arm 720 inside, a wire hole 810 is formed in the clamping groove 800 at a position corresponding to the second spring arm 720, and a wire extends into the wire hole 810 and is pressed by the second spring arm 720.

Fig. 5 is a schematic structural diagram of a second contact, a power receiving plate and a wire pressing spring provided in an embodiment of the disclosure, and fig. 6 is a schematic structural diagram of an installation structure of a wire pressing spring provided in an embodiment of the disclosure.

As shown in fig. 5 and 6, a preset angle may be formed between the first spring arm 710 and the second spring arm 720 of the pressing spring 700, and the slot 800 provided in the housing may have two slot walls corresponding to the first spring arm 710 and the second spring arm 720, so that the pressing spring 700 may be stably clamped into the slot 800. After the wire pressing spring 700 is clamped into the clamping groove 800, the first spring arm 710 and the second spring arm 720 respectively support against the two groove walls, and the first spring arm 710 and the second spring arm 720 are also simultaneously pressed. So that the second spring arm 720 can press against the power board 600.

As an example, a limiting groove for accommodating the power receiving plate 600 may be further provided in the case, so that the power receiving plate 600 can be stably fixed and pressed by the second elastic piece arm 720.

As an example, the coil spring 230 may be fixedly connected to the power receiving plate 600, the power receiving plate 600 is provided with a first fixing hole 610 at a position corresponding to the coil spring mounting post 500, the coil spring mounting post 500 is provided with a threaded hole corresponding to the first fixing hole 610, and the power receiving plate 600 can be fixed to the housing together with the middle portion of the coil spring 230 by passing a screw through the first fixing hole 610 and screwing into the threaded hole. The second fixing hole 620 may be further formed on the power receiving plate 600, and the power receiving plate may be fixedly connected to the housing by a screw.

The clamping groove 800 may be provided with a wiring hole 810, and as an example, the wiring hole 810 may be located on a groove wall corresponding to the second elastic piece arm 720, so that a wire can enter a position where the second elastic piece arm 720 contacts with the electric connection plate 600 through the wiring hole 810, and extend into a position between the second elastic piece arm 720 and the electric connection plate 600 under the action of a certain pushing force, so that the second elastic piece arm 720 compresses the wire on the electric connection plate 600, and the wire is electrically connected with the electric connection plate 600.

In this case, when the operator is connected to the electrical panel 600, only the end of the wire needs to be inserted into the wire hole 810 and pushed, so that the wire is pressed onto the electrical panel 600 by the wire pressing spring 700, the operation is simple and convenient, the skill requirement on the operator is low, and no special tool is needed, so that the installation and the operation can be greatly facilitated.

As an example, a wire withdrawal hole 820 may be further formed at a lower side of the position of the lower hole, and when the wire needs to be removed, a tool such as a screwdriver may be used to extend into the wire withdrawal hole 820 to press the second spring arm 720, so that the second spring arm 720 is bent inward and does not press the wire any more, thereby being able to withdraw the wire.

The embodiment of the disclosure also provides a gate control circuit, which comprises the gate contact switch in any embodiment.

The gate contact switch in any embodiment can be connected to the gate control circuit to control the connection and disconnection of the gate control circuit.

The gate control circuit provided by the embodiment of the disclosure comprises the gate contact switch in any embodiment, and the concave-convex design of the contact surface in the gate contact switch can effectively avoid dust accumulation, ensure good contact of the gate contact switch and ensure normal use of the contact switch.

The embodiment of the disclosure also provides a safety door, which comprises the gating circuit in the embodiment.

The safety door provided by the embodiment of the disclosure comprises the door contact switch in any embodiment in a gate control circuit, and the concave-convex design of the contact surface in the door contact switch can effectively avoid dust accumulation, ensure good contact of the door contact switch and ensure normal use of the contact switch.

The above detailed description should not be taken as limiting the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.

Claims (13)

1. A door contact switch comprising a first contact (100) and a second contact (200), characterized in that the first contact (100) comprises a first contact (110), and the second contact (200) comprises a second contact (210) corresponding to the first contact (110);

The first contact surface (111) and/or the second contact surface (211) are concave-convex, the first contact surface (111) is a side surface of the first contact portion (110) close to the second contact portion (210), and the second contact surface (211) is a side surface of the second contact portion (210) close to the first contact portion (110).

2. The door contact switch according to claim 1, characterized in that the first contact surface (111) and the second contact surface (211) are both arranged obliquely.

3. The door contact switch according to claim 2, further comprising a first support table (300), the first support table (300) being provided with an inclined support surface;

The first contact piece (100) comprises two first contact parts (110) and a communication part (120) connected between the two first contact parts (110), and the two first contact parts (110) are respectively fixed on the outer sides of two inclined supporting surfaces of the first supporting table (300).

4. The door contact switch according to claim 2, further comprising a second insulating support table (400), the second insulating support table (400) being provided with an inclined support surface;

the number of the second contact pieces (200) is two, and the two second contact portions (210) are respectively fixed on the outer sides of the two inclined supporting surfaces of the second insulating supporting table (400).

5. The door contact switch according to claim 3 or 4, characterized in that the first contact surface (111) and the second contact surface (211) are each covered with a conductive layer.

6. The door contact switch according to any one of claims 1-4, further comprising a resilient mechanism for providing resilient support for the second contact portion (210).

7. The door contact switch according to claim 6, characterized in that said elastic means is an elastic support portion integrally connected with said second contact portion (210).

8. The door contact switch according to claim 7, wherein the elastic support portion includes a connection piece (220) integrally connected with the second contact portion (210), and a coil spring (230) integrally connected with the connection piece (220), a middle portion of the coil spring (230) being fixed with a housing of the door contact switch.

9. The door contact switch according to claim 8, wherein a coil spring mounting post (500) is provided inside the housing, the coil spring mounting post (500) being for fixing a middle portion of the coil spring (230) to the housing of the door contact switch.

10. The door contact switch of any one of claims 1-4, further comprising a power pad (600) electrically connected to the second contact, a wire-pressing spring (700), and a wire in electrical communication with the door control circuit, the wire-pressing spring (700) pressing the wire to contact the wire with the power pad (600).

11. The door contact switch of claim 10, wherein the wire pressing spring (700) comprises a first spring arm (710) and a second spring arm (720) connected to the first spring arm (710), a preset angle is formed between the first spring arm (710) and the second spring arm (720), a clamping groove (800) is formed in the shell, the clamping groove (800) clamps the first spring arm (710) and the second spring arm (720) inside, a wire connection hole (810) is formed in a position corresponding to the second spring arm (720) in the clamping groove (800), and the wire extends into the wire connection hole (810) and is pressed by the second spring arm (720).

12. A gating circuit comprising a gate contact switch according to any one of claims 1-11.

13. A safety door comprising the gating circuit of claim 12.