Door contact switch, door control circuit and safety door
By designing a concave-convex structure and using elastic mechanisms on the contact surface of the door contact switch, the problems of dust pollution and conductive layer wear are solved, efficient electrical contact and long life are achieved, and the installation process is simplified and the cost is reduced.
Patent Information
- Application Number
- CN202311275964.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-28
- Publication Date
- 2025-03-28
AI Technical Summary
Existing door contact switches are easily contaminated in dusty environments, resulting in poor contact and affecting normal use. The high thickness of the conductive layer leads to increased costs, and the installation is complicated, which makes them prone to poor contact.
A concave-convex contact surface is designed to reduce dust accumulation through multi-point electrical contact, combine with an elastic mechanism to reduce wear of the conductive layer, and use crane shrapnel to simplify wire access and reduce installation complexity.
It effectively reduces the impact of dust on door contact switches, improves conductive performance and service life, simplifies the installation process, and reduces costs.
Smart Images
Figure CN119724962A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of elevator safety control, and in particular to a door contact switch, a door control circuit and a safety door. Background Art
[0002] Door contact switches are mostly used in elevator car doors and landing door mechanisms. The closing and opening of the door contact switch are controlled by the opening and closing of the door.
[0003] At present, the protection level of door contact switches is generally IP20, which only protects against the entry of solid objects with a diameter greater than 12.5 mm. When the door contact switch is in use, dust in the environment can easily invade and accumulate on the contact piece of the door contact switch, causing pollution to the contact piece, which can easily lead to poor contact of the door contact switch and affect the normal use of the door contact switch. For example, the accumulation of dust on the contact piece may cause problems such as elevator fault alarm or abnormal parking.
[0004] In order to ensure the conductive effect of the door contact switch under the influence of environmental dust, the existing door contact switch periodically uses the rigid friction between the contact column and the contact surface of the contact switch to clean the dust, oxide layer and carbonized layer on the contact surface. This rigid friction can also be caused by reasons such as door machine vibration, mechanical deviation and mechanical action redundancy.
[0005] The existing contact sheet adopts a flat surface. In order to cope with the periodic forced mechanical friction between the contact column and the contact sheet surface, a thicker conductive layer needs to be provided on the contact sheet surface. The conductive layer is generally made of silver, and a thicker conductive layer will cause high costs.
[0006] Although the rigid friction on the contact surface can clean the dust, oxide layer and carbonized layer on the contact surface, the number of frictions on the contact surface is less for doors with low opening and closing frequencies, resulting in a limited cleaning effect. For doors with high opening and closing frequencies, frequent rigid friction on the contact surface will cause rapid wear of the contact surface or the conductive layer on the contact surface, affecting the stability and reliability of electrical connectivity between the contacts.
[0007] Therefore, the flat contact surface structure and the thick conductive layer coating will not only result in high costs, but also fail to adapt to doors with high opening and closing frequencies and doors with low opening and closing frequencies at the same time.
[0008] In addition, in the related art, when the door contact switch is connected to the gate control circuit, the wire is generally tightened by screws. In this method, the operator needs to use special tools to complete the connection between the wire and the door contact switch. The installation procedure is complicated and is subject to the operator's skill level and whether the correct tools are used, which can easily cause problems such as poor contact. In addition, tightening the screws too deep or too shallow will affect the stability of the connection between the screws and the wires. The wires tightened by the screws may be at risk of falling out, so the position where the screws are tightened needs to be regularly maintained to ensure the stable connection of the door contact switch. Summary of the invention
[0009] In order to solve at least one of the above technical problems, the present disclosure provides a door contact switch, a door control circuit and a safety door.
[0010] According to one aspect of the present disclosure, a door contact switch is provided, comprising a first contact piece and a second contact piece, wherein the first contact piece comprises a first contact portion, and the second contact piece comprises a second contact portion corresponding to the position of the first contact portion;
[0011] The first contact surface and / or the second contact surface is concave-convex. The first contact surface is a side surface of the first contact portion close to the second contact portion, and the second contact surface is a side surface of the second contact portion close to the first contact portion.
[0012] Optionally, the first contact surface and the second contact surface are both arranged obliquely.
[0013] Optionally, the door contact switch further comprises a first support platform, and the first support platform is provided with an inclined support surface;
[0014] The first contact piece includes two first contact portions and a connecting portion connected between the two first contact portions. The two first contact portions are respectively fixed to the outer sides of the two inclined supporting surfaces of the first supporting platform.
[0015] Optionally, the door contact switch further comprises a second insulating support platform, and the second insulating support platform is provided with an inclined support surface;
[0016] The number of the second contact pieces is two, and the two second contact portions are respectively fixed to the outer sides of the two inclined support surfaces of the second insulating support platform.
[0017] Optionally, both the first contact surface and the second contact surface are covered with a conductive layer.
[0018] Optionally, an elastic mechanism is further included, and the elastic mechanism is used to provide elastic support for the second contact portion.
[0019] Optionally, the elastic mechanism is an elastic supporting portion integrally connected to the second contact portion.
[0020] Optionally, the elastic support portion includes a connecting piece integrally connected to the second contact portion, and a coil spring integrally connected to the connecting piece, and a middle portion of the coil spring is fixed to the housing of the door contact switch.
[0021] Optionally, a coil spring mounting column is arranged on the inner side of the shell, and the coil spring mounting column is clamped into the middle part of the coil spring.
[0022] Optionally, the door contact switch further comprises a power board electrically connected to the second contact piece, a wire pressing spring and a wire electrically connected to the gate control circuit, wherein the wire pressing spring presses the wire to make the wire contact with the power board.
[0023] Optionally, the wire pressing spring includes a first spring arm and a second spring arm connected to the first spring arm, and there is a preset angle between the first spring arm and the second spring arm. A slot is provided in the shell, and the slot clamps the first spring arm and the second spring arm on the inside. The slot has a wiring hole at a position corresponding to the second spring arm, and the wire extends into the wiring hole and is clamped by the second spring arm.
[0024] According to another aspect of the present disclosure, a gate control circuit is provided, comprising the above-mentioned door contact switch.
[0025] According to another aspect of the present disclosure, a safety door is provided, characterized in that it includes the above-mentioned gate control circuit.
[0026] Beneficial Effects
[0027] The door contact switch provided by the embodiment of the present disclosure has the following advantages:
[0028] (1) By providing a concave-convex structure on the contact surface, dust is not easy to accumulate, and when there is a certain amount of dust accumulation on the contact surface, dust is not easy to accumulate on the convex points of the contact surface. Moreover, when the convex points on the contact surface contact another contact surface, the convex points can squeeze out or shovel out the dust accumulated on the other contact surface, making the conductive effect better. The convex points on the contact surface can achieve effective electrical contact, and the inclined setting of the contact surface allows dust to slide off effectively, avoiding dust accumulation on the contact surface. Therefore, this solution can effectively reduce the impact of dust in the environment on the door contact switch and ensure the normal use of the contact switch.
[0029] (2) At the same time, the number of convex points on the contact surface of the concave-convex structure is large, which will form multi-point electrical contact. The concave-convex contact surface design can significantly increase the effective contact area. This design utilizes the principles of physical geometry. By increasing the roughness of the contact surface, the contact piece can fit more tightly at multiple points during the contact process. There are more contact points on the concave-convex contact surface, thereby improving the conductive performance. Relatively speaking, when two flat contacts are in contact, they generally need to be set as a structure with a central convexity, so the contact area is smaller and there are fewer contact points.
[0030] (3) By setting a concave-convex structure on the contact surface, the overall thickness of the conductive layer can be reduced, greatly reducing the consumption of conductive layer materials. There are multiple ways to set the two contact surfaces: the first way is that a single contact surface is a concave-convex structure and the other contact surface is a flat structure; the second way is that both contact surfaces are concave-convex structures. In addition, by setting an elastic mechanism, the wear rate of the conductive layer can be greatly reduced, thereby increasing the service life of the door contact switch. Relatively speaking, the main contact point of the two flat contact surfaces with a raised center is in the center, so there is more friction at the center point, and more conductive layer materials need to be deposited at and near the center point. The contact surface with a concave-convex structure in this solution forms multi-point electrical contact, so there is no need to deposit more conductive layers at a single point. Therefore, the conductive layer of this solution is thinner than the conductive layer in the prior art, which can greatly save the consumption of conductive layer materials and reduce the cost of conductive layer materials.
[0031] (4) By setting the concave and convex contact surfaces in an inclined manner, dust is less likely to accumulate on the contact surfaces, thereby achieving a better technical effect of electrical contact.
[0032] (5) The wire can be connected by pressing the wire with a wire pressing spring. It is easy to install and does not require special tools or tightening screws. It has low technical requirements for operators and greatly facilitates the installation of door contact switches. The pressing connection method also has good connection stability.
[0033] (6) The structure of the door contact switch in this case is simple and convenient to assemble. By installing the first contact piece and the second contact piece separately, the door contact switch can be assembled as a whole, and the assembly efficiency is high.
[0034] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure.
[0036] Figure 1 is a schematic diagram of the overall structure of a door contact switch provided by an embodiment of the present disclosure;
[0037] Figure 2 is a structural schematic diagram of a first contact piece in a door contact switch provided by an embodiment of the present disclosure;
[0038] Figure 3 is a schematic structural diagram of a second contact piece in a door contact switch provided by an embodiment of the present disclosure;
[0039] Figure 4It is a schematic diagram of the structure of the installation location of the second contact piece and the second insulating support platform provided by an embodiment of the present disclosure;
[0040] Figure 5 It is a structural schematic diagram of a second contact piece, a power connection plate and a wire pressing spring piece provided in an embodiment of the present disclosure;
[0041] Figure 6 It is a schematic diagram of the installation structure of the wire pressing spring provided in an embodiment of the present disclosure.
[0042] The reference numerals in the specific implementation manner are as follows:
[0043] First contact piece 100; first contact portion 110; first contact surface 111; second connecting hole 112; connecting portion 120; first connecting hole 121, second contact piece 200; second contact portion 210; second contact surface 211; transition portion 212; first support platform 300; second insulating support platform 400; coil spring mounting column 500; power board 600; first fixing hole 610; second fixing hole 620; wire pressing spring 700; first spring arm 710; second spring arm 720; slot 800; wiring hole 810; wire withdrawal hole 820; contact column 900. DETAILED DESCRIPTION
[0044] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.
[0045] All technical terms used in this document have the same meanings as those generally understood by technicians in the technical field to which this application belongs; the terms used in this document are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.
[0046] In the description of the embodiments of the present application, the term "at least one" refers to one or more, and "plurality" refers to more than two (including two).
[0047] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.
[0048] Figure 1 A schematic diagram of the overall structure of a door contact switch provided by an embodiment of the present disclosure is shown. Figure 2 is a schematic structural diagram of a first contact piece in a door contact switch provided by an embodiment of the present disclosure, Figure 3 It is a schematic diagram of the structure of a second contact piece in a door contact switch provided in an embodiment of the present disclosure.
[0049] like Figure 1 , 2 As shown in , 3, the door contact switch includes a first contact piece 100 and a second contact piece 200, the first contact piece 100 includes a first contact portion 110, and the second contact piece 200 includes a second contact portion 210 corresponding to the position of the first contact portion 110;
[0050] The first contact surface 111 and / or the second contact surface 211 are concavoconvex. 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 .
[0051] Among them, the door contact switch can be connected to the gate control circuit. When the door is opened, the door contact switch is controlled to be disconnected, so that the gate control circuit is disconnected; when the door is closed, the door contact switch is controlled to be connected, so that the gate control circuit is connected.
[0052] As an example, the second contact piece 200 may be fixedly arranged, and the first contact piece 100 may be moved toward the second contact piece 200 driven by the door, and finally contact the second contact piece 200 .
[0053] The surface of the first contact portion 110 that contacts the second contact portion 210 may be referred to as a first contact surface 111 , and the surface of the second contact portion 210 that contacts the first contact portion 110 may be referred to as a second contact surface 211 .
[0054] At least one of the first contact surface 111 and the second contact surface 211 can be set to a concave-convex shape. As an example, one of the first contact surface 111 and the second contact surface 211 can be set to a concave-convex shape, and the other can be set to a flat surface. In this case, when the concave-convex shape contacts the flat surface, it can still form multiple points of electrical contact and avoid the influence of dust, thereby enhancing the conductive effect. As another example, the first contact surface 111 and the second contact surface 211 can both be set to a concave-convex shape. In this case, when the two concave-convex surfaces contact, it can form multiple points of electrical contact and avoid the influence of dust, thereby enhancing the conductive effect. The above-mentioned concave-convex shape means that when one point is concave, another adjacent point is convex, and when one point is convex, another adjacent point is concave.
[0055] As an example, the concavo-convex shape of the contact surface can be realized by a concavo-convex texture, and the form of the texture may include but is not limited to a wave shape, a Z shape, a sawtooth shape, etc. The concavo-convex shape of the contact surface can also be realized by a plurality of independent convex points, and the shape of the convex points may include but is not limited to a cone shape, a disc shape, a truncated cone shape, a cylinder shape, etc. The arrangement of the convex points may include but is not limited to a parallel arrangement, a dot matrix arrangement, a custom shape arrangement, etc. Regardless of the texture form and distribution method, a plurality of convex points will be formed on the first contact surface 111 or the second contact surface 211 to form a multi-point electrical contact.
[0056] If the first contact surface 111 and the second contact surface 211 are both set as planes, the plane contact surface is easy for dust to accumulate, and the accumulated dust is easy to cover the entire contact surface, forming a dust layer. When the first contact surface 111 and the second contact surface 211 are in contact, the dust layer will cause poor contact. In this case, since the contact surface is set to be concave-convex, dust will accumulate more in the grooves of the concave-convex contact surface, and will not accumulate too much in the convex points. The convex points can squeeze out or shovel out the dust accumulated at the corresponding point of the other contact surface. This allows the contact surface to achieve good electrical contact based on the convex points.
[0057] In addition, no matter whether the rigid friction between the first contact surface 111 and the second contact surface 211 is high frequency or low frequency, the contact surface of the concave-convex structure can be adaptive. For the concave-convex structure with low frequency friction, the bumps themselves are not easy to accumulate dust and are not easy to wear; while for the concave-convex structure with high frequency friction, the heights of multiple bumps are not strictly the same (for example, there are slight differences due to processing accuracy), so that after the coating of the higher bump conductive layer is worn, the lower bump conductive layer still tightly presses against the relative contact surface, so that good conductivity can be achieved.
[0058] In addition, the contact surface is configured to be concave-convex, so that when the first contact surface 111 contacts the second contact surface 211, they are actually contacting each other through the convex points in the concave-convex structure, so that the contact area between the first contact surface 111 and the second contact surface 211 is greatly reduced, and the pressure applied to the convex points will increase accordingly, and the friction force on the convex points will also increase. This means that even if dust accumulates on the convex points, the greater friction force will help to remove the dust accumulated on the convex points, thereby ensuring the contact effect.
[0059] In this solution, the concavo-convex design of the first contact surface 111 and / or the second contact surface 211 makes it possible for convex points and concave points to exist on the contact surface, which makes it difficult for dust to accumulate. Even if dust accumulates, it is not easy for the dust to accumulate on the convex points of the contact surface. Based on the convex points of the contact surface, effective electrical contact of the contact surface can be achieved, ensuring good contact of the door contact switch and normal use of the contact switch.
[0060] In the present case, the electrical contact between the first contact sheet 100 and the second contact sheet 200 is mainly achieved through the convex points in the concave-convex structure. By setting the concave-convex structure, the overall thickness of the conductive layer can be reduced, and the thickness of the conductive layer corresponding to the groove part in the concave-convex structure is also smaller. Compared with directly setting a thicker planar conductive layer on the contact sheet, the concave-convex structure design of the conductive layer in the present case can greatly reduce the consumption of conductive layer materials, and the cost of conductive layer materials is generally very high. Therefore, the conductive layer in the present case can greatly reduce the cost of conductive layer materials while ensuring the electrical contact effect.
[0061] In an optional embodiment of the present disclosure, the first contact surface 111 and the second contact surface 211 are both arranged obliquely. By the inclined arrangement of the concave and convex contact surfaces, dust is less likely to gather on the contact surfaces, thereby achieving a better technical effect of electrical contact.
[0062] Among them, the first contact surface 111 and the second contact piece are both inclined, so that under the action of gravity, dust is not easy to accumulate on the inclined contact surface, and the inclined contact surface is also easy for dust to slide and / or be squeezed off, thereby ensuring good contact of the door contact switch and ensuring normal use of the contact switch.
[0063] As an example, the inclination angles of the first contact surface 111 and the second contact surface 211 need to correspond to each other, so that the first contact surface 111 and the second contact surface 211 can fit smoothly and ensure good electrical contact between the contact surfaces.
[0064] The inclination angle 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, it will be unfavorable for dust to slide off; if the inclination angle is too large, it will affect the smooth fit of the first contact surface 111 and the second contact surface 211. As an example, the inclination angle of the first contact surface 111 and the second contact surface 211 can be in the range of 0°-90° to the horizontal plane. As an example, the inclination angle can be 0 degrees, that is, not inclined. At this time, a good conductive effect can still be achieved by the concave-convex structure of the contact surface alone. As an example, the inclination angle of the first contact surface 111 and the second contact surface 211 can be 40°-60° to the horizontal plane.
[0065] In this solution, the contact surface is tilted to allow dust to slide off effectively, avoiding dust accumulation on the contact surface. The concave-convex structure of the contact surface prevents dust from accumulating easily. When there is a certain amount of dust accumulation on the contact surface, dust is not easy to accumulate on the convex points of the contact surface. Effective electrical contact can be achieved based on the convex points of the contact surface. By combining the concave-convex structure of the contact surface and the tilted setting of the contact surface, the influence of dust in the environment on the door contact switch can be effectively reduced, ensuring the normal use of the contact switch.
[0066] In an optional implementation manner of the present disclosure, the door contact switch further comprises a first support platform 300, and the first support platform 300 is provided with an inclined support surface;
[0067] The first contact sheet 100 includes two first contact portions 110 and a connecting portion 120 connected between the two first contact portions 110 . The two first contact portions 110 are respectively fixed to the outer sides of two inclined supporting surfaces of the first supporting platform 300 .
[0068] In an optional implementation manner of the present disclosure, if the first contact sheet 100 does not need a support platform, the first contact sheet 100 itself has rigidity, for example, it can be formed into a structure that cooperates with the second contact sheet 200.
[0069] When the first contact sheet 100 and the second contact sheet 200 are in contact, as long as the electrical conduction effect can be achieved, a support table is not required, which can save a certain amount of product cost.
[0070] In an optional implementation of the present disclosure, the door contact switch further comprises a second insulating support platform 400, and the second insulating support platform 400 is provided with an inclined support surface;
[0071] When the second contact portion 210 is pressed by the corresponding part of the first contact piece, the second contact portion 210 and the support platform make a small linear motion in the switch because the second contact portion 210 is supported by the support platform. At this time, the support platform is connected to the second contact portion 210 to make a linear motion, and the linear motion is limited by the elastic force of the coil spring, so that the movement range of the second contact portion 210 is limited to a smaller range.
[0072] In an optional embodiment of the present disclosure, if the second contact piece 200 does not need a support platform, after the coil spring portion of the second contact piece is fixed, the second contact piece can be suspended in the air due to its own rigidity. When the second contact piece contacts the first contact piece, an electrical conduction effect can be achieved;
[0073] When the second contact piece 200 has no support platform, the second contact portion 210 of the second contact piece 200 is suspended in the air. When the second contact portion 210 is pressed by the corresponding portion of the first contact piece, since the second contact portion 210 is not supported by the support platform, 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 the support platform. No support platform is required, which can save a certain amount of product cost.
[0074] In an optional embodiment of the present disclosure, there are two second contact pieces 200, and the two second contact pieces 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 platform 400; in this case, the number of the first contact piece 100 that cooperates with the two second contact pieces 200 is one.
[0075] The second contact sheet 200 may be two independently arranged ones, and the two second contact sheets 200 are respectively connected to the wiring terminals of the gate control circuit, and the two second contact sheets 200 are electrically isolated. When the first contact sheet 100 is not in contact with the second contact sheet 200, the gate control circuit is disconnected. When the first contact sheet 100 is in contact with the second contact sheet 200, the gate control circuit is connected.
[0076] In an optional embodiment of the present disclosure, the number of the second contact pieces 200 is an even number, and the second contact pieces 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 platform 400; in this case, the number of the first contact pieces 100 that cooperate with the even number of the second contact pieces 200 is half the number of the second contact pieces 200.
[0077] In an embodiment of the present application, the two second contact pieces 200 can be separated on both sides of the second insulating support platform. The second contact piece 200 located on one side of the second insulating support platform can also integrate multiple sub-second contact pieces, and each sub-second contact piece can be in a parallel relationship and respectively connected to the gate control circuit. Any sub-second contact piece can have a symmetrically arranged sub-second contact piece on the opposite side of the second insulating support platform, and the two constitute a sub-second contact piece group. Corresponding to the structure in which the second contact piece includes multiple sub-second contact pieces, the first contact piece 100 can also be composed of multiple sub-first contact pieces electrically isolated from each other, and each sub-first contact piece can be arranged corresponding to a sub-second contact piece group. By contacting the sub-first contact piece with two sub-second contact pieces in the corresponding sub-second contact piece group, the electrical connection of the two sub-second contact pieces can be controlled.
[0078] In an optional embodiment of the present disclosure, the first contact sheet 100 includes two first contact portions 110, and the two first contact portions 110 are respectively arranged corresponding to the second contact portions 210 of the two second contact sheets 200, and the connecting portion 120 in the middle of the first contact sheet 100 is used to electrically connect the two first contact portions 110. When the first contact sheet 100 contacts the two second contact sheets 200, the first contact sheet 100 can connect the two second contact sheets 200, so that the gate control circuit is connected.
[0079] Reference Figure 1 , 2 The first support platform 300 is used to fix and support the first contact sheet 100. The first support platform 300 can provide two inclined support surfaces, so that the first contact portion 110 of the first contact sheet 100 can be fixed obliquely to the inclined support surface, thereby realizing the inclined setting of the first contact surface 111. The first contact sheet 100 can be provided with a first connection hole 121 on the connecting portion 120, and a second connection hole 112 is provided on the outer side of the first contact portion 110, so as to fix the first contact sheet 100 to the first support platform 300.
[0080] As an example, the first support platform 300 can be fixedly connected to the contact column 900. When the door moves from the open state to the closed state, the door will contact and squeeze the contact column 900, so that the contact column 900 moves, and the contact column 900 drives the first support platform 300 and the first contact piece 100 to move toward the second contact piece 200, and finally makes the first contact piece 100 contact the second contact piece 200. When the door moves from the closed state to the open state, the reset mechanism provided on the upper part of the first support platform 300 can drive the first support platform 300 and the contact column 900 to reset, so that the first contact piece 100 and the second contact piece 200 are restored to a non-contact state. Among them, the reset mechanism can be a spring, etc., which is not limited in this case.
[0081] The second insulating support platform 400 is located between the two second contact pieces 200 to fix and support the two second contact pieces 200. The second insulating support platform 400 is made of insulating material to ensure electrical isolation between the two second contact pieces 200. The second insulating support platform 400 can provide two inclined support surfaces, so that the second contact portions 210 of the two second contact pieces 200 can be fixed obliquely on the inclined support surfaces, thereby realizing the inclined setting of the second contact surface 211.
[0082] Figure 4 A schematic diagram of the structure of the installation location of the second contact piece and the second insulating support platform provided by an embodiment of the present disclosure is shown.
[0083] like Figure 4 As shown in the figure, the cross-section of the second insulating support platform 400 can be approximately trapezoidal in shape, and the inclined support surfaces on both sides of the second insulating support platform 400 are inclined downward, so that the contact parts of the two second contact surfaces 211 are also inclined downward, and the dust on the second contact surface 211 will slide along the inclined support surface to the outside of the second insulating support platform 400, so that the dust sliding from the second contact surface 211 will not affect the normal contact between the first contact piece 100 and the second contact piece 200.
[0084] Reference Figure 3 , 4 The second contact portion 210 of the second contact sheet 200 is arranged at an angle, and a bent transition portion 212 is formed on the second contact sheet 200 at a position close to the second contact portion 210. The second insulating support platform 400 can be provided with a limiting groove adapted to the shape of the transition portion 212, so that the transition portion can be fixed in the limiting groove, and the second contact portion 200 can be arranged at an angle and fixed above the inclined support surface of the second insulating support platform 400.
[0085] In an optional implementation of the present disclosure, both the first contact surface 111 and the second contact surface 211 are covered with a conductive layer.
[0086] The conductive layer may be made of a good conductor material to ensure good conductivity of the contact sheet. For example, a silver conductive layer may be used.
[0087] Specifically, the first contact sheet 100 and the second contact sheet 200 may be provided with a conductive layer as a contact surface on the contacting side surface, and a concave-convex structure may be provided on the conductive layer.
[0088] In an optional embodiment of the present disclosure, the first contact surface 111 and / or the second contact surface 211 do not have a conductive layer. Since the first contact surface 111 and / or the second contact surface 211 are made of conductive material and have the advantages of the structure of the first contact surface 111 and / or the second contact surface 211, a good conductive effect can still be ensured.
[0089] In the present case, the electrical contact between the first contact sheet 100 and the second contact sheet 200 is mainly achieved through the convex points in the concave-convex structure. By setting the concave-convex structure, the overall thickness of the conductive layer can be reduced, and the thickness of the conductive layer corresponding to the groove part in the concave-convex structure is also smaller. Compared with directly setting a thicker planar conductive layer on the contact sheet, the concave-convex structure design of the conductive layer in the present case can greatly reduce the consumption of conductive layer materials, and the cost of conductive layer materials is generally very high. Therefore, the conductive layer in the present case can greatly reduce the cost of conductive layer materials while ensuring the electrical contact effect.
[0090] In an optional implementation manner of the present disclosure, the door contact switch further includes an elastic mechanism, and the elastic mechanism is used to provide elastic support for the second contact portion 210 .
[0091] The elastic mechanism can provide support for the second contact portion 210 and provide elastic buffering for the second contact portion 210 at the same time.
[0092] Due to reasons such as door machine vibration, mechanical deviation and mechanical action redundancy, the movement of the first contact piece 100 may exceed the preset stroke, which may cause rigid friction between the contacts of the traditional door contact switch. Frequent rigid friction will cause rapid wear of the contacts or the conductive layer on the surface of the contacts, affecting the stability and reliability of the electrical connection between the contacts.
[0093] In this solution, the elastic mechanism can provide elastic buffering for the second contact portion 210, so that when the first contact portion 110 moves beyond a preset stroke, the second contact portion 210 can be elastically buffered by the elastic mechanism, thereby avoiding rigid friction between the first contact portion 110 and the second contact portion 210, avoiding rapid wear of the contact piece or the conductive layer on the surface of the contact piece, and ensuring the stability and reliability of the electrical connection between the contact pieces.
[0094] In this case, the elastic mechanism can be provided to greatly reduce the wear rate of the conductive layer and increase the service life of the door contact switch. At the same time, since the wear rate of the conductive layer is greatly reduced, the use of a thinner conductive layer can also ensure the service life of the door contact switch. Therefore, the conductive layer in this solution is thinner than the conductive layer in the prior art, which can greatly save the consumption of the conductive layer material and reduce the cost of the conductive layer material.
[0095] In an optional implementation manner of the present disclosure, the elastic mechanism is an elastic supporting portion integrally connected to the second contact portion 210 .
[0096] Among them, the elastic mechanism can be an elastic support part integrally connected to the second contact part 210, which is equivalent to integrating the elastic support function on the second contact piece 200. Compared with separately setting an elastic mechanism to provide elastic support, the structure of the door contact switch in this case is simplified, and there is no need to install an elastic mechanism separately, which is more convenient for the assembly of the door contact switch.
[0097] In an optional embodiment of the present disclosure, the elastic support portion includes a connecting piece 220 integrally connected to the second contact portion 210, and a coil spring 230 integrally connected to the connecting piece 220, and the middle portion of the coil spring 230 is fixed to the housing of the door contact switch.
[0098] like Figure 2 , 3 As shown in , the elastic support portion may specifically include a connecting piece 220 and a coil spring 230 , wherein the connecting piece 220 is used to be integrally connected with the second contact portion 210 , and the coil spring 230 is fixed to the housing of the door contact switch and provides elasticity.
[0099] In an optional implementation of the present disclosure, a coil spring installation column 500 is disposed on the inner side of the housing, and the coil spring installation column 500 is inserted into the middle part of the coil spring.
[0100] The coil spring mounting column 500 may be provided inside the housing and may be integrally molded with the housing. The middle portion of the coil spring 230 is fixed to the housing through the coil spring mounting column 500 so that the coil spring can provide elastic support for the second contact portion 210 .
[0101] In this case, the second contact piece 200 is integrally connected to the coil spring 230, so that the second contact piece 200 itself has elasticity. Compared with separately setting up an elastic mechanism to provide elastic support, the structure of the door contact switch in this case is simplified, and there is no need to install an elastic mechanism separately. Only the second contact piece 200 needs to be directly installed, which is convenient for the assembly of the door contact switch.
[0102] The main components of the door contact switch in this case are the first contact piece 100 and the second contact piece 200, and the structure is simple. When assembling the door contact switch, the first contact piece 100 and the second contact piece 200 are respectively installed in the housing to achieve the overall assembly of the door contact switch. Therefore, the assembly efficiency of the door contact switch in this case is high, which also helps to improve the production efficiency of the door contact switch.
[0103] In this case, the second contact piece 200 is integrally connected to the coil spring 230, so that the second contact piece 200 itself has elasticity. Compared with separately setting up an elastic mechanism to provide elastic support, the structure of the door contact switch in this case is simplified, and there is no need to install an elastic mechanism separately. Only the second contact piece 200 needs to be directly installed, which is convenient for the assembly of the door contact switch.
[0104] In an optional embodiment of the present disclosure, the door contact switch further comprises a power board 600 electrically connected to the second contact piece 200, a wire pressing spring 700 and a wire electrically connected to the gate control circuit, wherein the wire pressing spring 700 presses the wire to make the wire contact with the power board 600.
[0105] The wire can be used as an access terminal of the door contact switch to the gate control circuit, and the wire needs to be electrically connected to the second contact piece 200. The power board 600 is electrically connected to the second contact piece 200, and the power board 600 is used to establish an electrical connection with the wire.
[0106] In this case, the wire pressing spring piece 700 is used to press the wire tightly so that the wire contacts the power board 600, thereby realizing the access of the wire. Compared with the existing solution of using screws to tighten the wire, in this case, only the wire pressing spring piece 700 is used to press the wire tightly to realize the access of the wire. The installation is simple and no special tools are required. The technical requirements for the operator are low, which greatly facilitates the installation operation of the door contact switch, and the compression connection method also has good connection stability.
[0107] In an optional embodiment of the present 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. There is a preset angle between the first spring arm 710 and the second spring arm 720. A slot 800 is provided in the shell, and the slot 800 clamps the first spring arm 710 and the second spring arm 720 on the inside. The slot 800 has a wiring hole 810 at a position corresponding to the second spring arm 720. The wire extends into the wiring hole 810 and is clamped by the second spring arm 720.
[0108] Figure 5 A schematic diagram of the structure of the second contact piece, the power board and the wire pressing spring provided in the embodiment of the present disclosure, Figure 6 A schematic diagram of the installation structure of the wire pressing spring provided in an embodiment of the present disclosure.
[0109] like Figure 5 , 6 As shown in the figure, the first spring arm 710 and the second spring arm 720 of the wire pressing spring 700 can be at a preset angle, and the card slot 800 provided in the housing can be provided with two slot walls corresponding to the first spring arm 710 and the second spring arm 720, so that the wire pressing spring 700 can be stably inserted into the card slot 800. After the wire pressing spring 700 is inserted into the card slot 800, the first spring arm 710 and the second spring arm 720 respectively support the two slot walls, and the first spring arm 710 and the second spring arm 720 are also squeezed at the same time. So that the second spring arm 720 can press the connecting board 600 tightly.
[0110] As an example, a limiting groove for accommodating the power board 600 may be further provided in the housing, so that the power board 600 can be stably fixed and pressed by the second elastic arm 720 .
[0111] As an example, the coil spring 230 can be fixedly connected to the power board 600. The power board 600 has a first fixing hole 610 at a position corresponding to the coil spring mounting column 500. The coil spring mounting column 500 has a threaded hole corresponding to the first fixing hole 610. By passing a screw through the first fixing hole 610 and screwing it into the threaded hole, the power board 600 and the middle part of the coil spring 230 can be fixed to the housing together. The power board 600 can also be provided with a second fixing hole 620, which can also be fixedly connected to the housing by screws. By providing two fixing holes, the power board can be firmly fixed to the housing.
[0112] A wiring hole 810 may be opened in the card slot 800. As an example, the wiring hole 810 may be located on the slot wall corresponding to the second elastic arm 720, so that the wire can pass through the wiring hole 810 and enter the position where the second elastic arm 720 contacts the power board 600, and extend between the second elastic arm 720 and the power board 600 under the action of a certain thrust, so that the second elastic arm 720 presses the wire against the power board 600, thereby realizing electrical connection between the wire and the power board 600.
[0113] In this case, when the operator connects the wire to the power board 600, he only needs to insert the end of the wire into the wiring hole 810 and push the wire so that the wire is pressed against the power board 600 by the wire pressing spring 700. The operation is simple, the skill requirements for the operator are low, and no special tools are required, which can greatly facilitate the installation operation.
[0114] As an example, a wire withdrawal hole 820 can also be set on the lower side of the connecting hole. When the wire needs to be removed, a tool such as a screwdriver can be used to reach into the wire withdrawal hole 820 to squeeze the second spring arm 720, so that the second spring arm 720 bends inward and no longer presses the wire, so that the wire can be pulled out.
[0115] An embodiment of the present disclosure also provides a gate control circuit, including the door contact switch in any of the above embodiments.
[0116] The door contact switch in any of the above embodiments may be connected to a gate control circuit to control the connection and disconnection of the gate control circuit.
[0117] The gate control circuit provided by the embodiments of the present disclosure includes the door contact switch in any of the above embodiments. The concave-convex design of the contact surface in the door contact switch can effectively prevent dust accumulation, ensure good contact of the door contact switch, and ensure normal use of the contact switch.
[0118] The disclosed embodiments further provide a safety door, comprising the gate control circuit in the above embodiments.
[0119] The safety door provided by the embodiments of the present disclosure includes a door contact switch in any of the above embodiments in its door control circuit. The concave-convex design of the contact surface in the door contact switch can effectively prevent dust accumulation, ensure good contact of the door contact switch, and ensure normal use of the contact switch.
[0120] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.
Claims
1. A door contact switch, comprising a first contact piece (100) and a second contact piece (200), characterized in that: The first contact sheet (100) comprises a first contact portion (110), and the second contact sheet (200) comprises a second contact portion (210) corresponding to the position of the first contact portion (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 at an inclination.
3. The door contact switch according to claim 2, characterized in that: It also includes a first support platform (300), wherein the first support platform (300) is provided with an inclined support surface; The first contact piece (100) comprises two first contact portions (110) and a connecting portion (120) connected between the two first contact portions (110), and the two first contact portions (110) are respectively fixed to the outer sides of two inclined support surfaces of the first support platform (300).
4. The door contact switch according to claim 2, characterized in that: It also includes a second insulating support platform (400), wherein the second insulating support platform (400) is 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 to the outer sides of the two inclined support surfaces of the second insulating support platform (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 both covered with a conductive layer.
6. The door contact switch according to any one of claims 1 to 4, characterized in that: It also comprises an elastic mechanism, which is used to provide elastic support for the second contact portion (210).
7. The door contact switch according to claim 6, characterized in that: The elastic mechanism is an elastic support portion integrally connected to the second contact portion (210).
8. The door contact switch according to claim 7, characterized in that: The elastic support portion comprises a connecting piece (220) integrally connected to the second contact portion (210), and a coil spring (230) integrally connected to the connecting piece (220), wherein the middle portion of the coil spring (230) is fixed to the housing of the door contact switch.
9. The door contact switch according to claim 8, characterized in that: A coil spring mounting column (500) is arranged inside the housing, and the coil spring mounting column (500) is used to fix the middle part of the coil spring (230) to the housing of the door contact switch.
10. The door contact switch according to any one of claims 1 to 4, characterized in that: It also includes a power connection board (600) electrically connected to the second contact piece, a wire pressing spring sheet (700), and a wire electrically connected to the gate control circuit, wherein the wire pressing spring sheet (700) presses the wire tightly to make the wire contact with the power connection board (600).
11. The door contact switch according to claim 10, characterized in that: The wire pressing spring (700) comprises a first spring arm (710) and a second spring arm (720) connected to the first spring arm (710), wherein a preset angle is formed between the first spring arm (710) and the second spring arm (720), and a clamping slot (800) is provided in the shell, wherein the clamping slot (800) clamps the first spring arm (710) and the second spring arm (720) inside, and a wiring hole (810) is formed in the clamping slot (800) at a position corresponding to the second spring arm (720), wherein the wire extends into the wiring hole (810) and is clamped by the second spring arm (720).
12. A gate control circuit, characterized in that: Comprising the door contact switch as claimed in any one of claims 1 to 11.
13. A safety door, characterized in that: Comprising the gate control circuit as claimed in claim 12.