Anti-disconnection safety switch
By designing a disconnection-proof safety switch, the resetting activities of elastic telescopic components and elastic contact parts are solved, and the problem of easy disconnection of the elevator door contact switch is achieved when the elevator shakes or doors are removed is ensured, ensuring the safe operation of the elevator.
Patent Information
- Application Number
- CN202510482147.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2025-05-23
AI Technical Summary
Existing elevator door contact switches are easily disconnected when the elevator shakes or pulls off the door, resulting in the occurrence of elevator safety accidents.
A disconnection-proof safety switch is designed, including a housing, a movable block, an elastic telescopic assembly and an elastic contact. When the movable block is squeezed, the contact bridge moves to the elastic contact member. The elastic telescopic assembly is in an elastically contracted state after contact, and the contact between the contact bridge and the elastic contact member is maintained by resetting the activity.
It effectively avoids the easy disconnection of the switch caused by the shaking of the elevator, the door slashing and short stroke, and ensures the safe operation of the elevator.
Smart Images
Figure CN120033012A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electrical components, and more particularly to an anti-disconnection safety switch. Background Art
[0002] In the elevator field, contact switches are usually used to verify the in-place status of the elevator door and the locked status of the door lock. The contact switch has two parts, a pin and a socket, which are respectively installed on the relevant parts of the two elevator doors to achieve disconnection or connection when the two elevator doors are relatively opened or closed.
[0003] In the prior art, most of the pins and plugs used in elevator door contact switches are fixed structures, and the pins and sockets are in contact in a fixed straight line direction. If the elevator shakes or encounters a door prying situation, the pins and sockets will be displaced in their active direction, which is likely to cause the connection between the pins and the socket to be disconnected, thereby causing an elevator safety accident; similarly, the contact switches in the prior art are generally small in size, and the small internal space leads to a shorter conduction stroke between the pins and the socket. Mechanical shaking during the start, stop or operation of the elevator may cause the switch to be disconnected, which may cause an elevator safety accident. Summary of the invention
[0004] In order to solve or at least partially solve the above technical problems, the present application provides an anti-disconnection safety switch, including a housing and a plug-in, wherein the housing is provided with: A movable block, elastically connected to the housing; An elastic telescopic component, one end of which is connected to the movable block and the other end of which is provided with a contact bridge; An elastic contact piece connected to the housing; The plug-in unit is used to be inserted into the housing to compress the movable block; When the movable block is squeezed, it can drive the contact bridge to move toward the elastic contact piece, and when the contact bridge contacts the elastic contact piece, it squeezes the elastic contact piece to an elastic deformation state, and the elastic telescopic component can be in an elastic contraction state after the contact bridge contacts the elastic contact piece; During the resetting activity after the extrusion of the movable block is cancelled, the elastic telescopic component and the elastic contact piece are resetting to keep the contact bridge in contact with the elastic contact piece until the resetting activity of the elastic telescopic component and the elastic contact piece is completed and the contact bridge is separated from the elastic contact piece; The elastic force of the elastic contact piece in the elastic deformation state is smaller than the elastic force of the elastic telescopic component in the elastic contraction state, so that the elastic contact piece remains fixed during the resetting activity of the elastic telescopic component until the resetting activity of the elastic telescopic component ends, and then the elastic contact piece is resetting; or, The elastic force of the elastic contact piece in the elastic deformation state is less than the maximum elastic force of the elastic telescopic component in the elastic contraction state, and is greater than the minimum elastic force of the elastic telescopic component in the elastic contraction state, so that when the elastic telescopic component is in the resetting activity, the elastic contact piece starts the resetting activity.
[0005] Optionally, a first chamber and a second chamber are formed inside the shell through a partition, a channel is provided on the surface of the partition, the elastic telescopic component extends from the first chamber through the channel to the second chamber, and the contact bridge and the elastic contact piece are arranged in the second chamber.
[0006] Optionally, a protective cap is sleeved on the elastic telescopic component, one end of the protective cap is connected to the partition, and the protective cap is used to seal the channel.
[0007] Optionally, a first spring is provided between the movable block and the shell, and the first spring is provided in pairs on both sides of the elastic telescopic component and is consistent with the telescopic direction of the elastic telescopic component, and is used to drive the resetting movement of the movable block.
[0008] Optionally, the elastic telescopic component includes a movable rod and a sleeve rod, one end of the movable rod is connected to the movable block, and the other end extends into the sleeve rod, a second spring is arranged in the sleeve rod and abuts between the sleeve rod and the movable rod, the surface of the sleeve rod has a sliding groove arranged along the expansion and contraction direction of the second spring, the movable rod has a buckle, the buckle can be slidably limited in the sliding groove, and the end of the sleeve rod away from the movable rod is connected to the contact bridge.
[0009] Optionally, the elastic contact piece includes a first metal spring and a second metal spring, and the first metal spring and the second metal spring are respectively arranged on both sides of the axis of the elastic telescopic component, and the contact bridge realizes the circuit connection or disconnection between the first metal spring and the second metal spring by contacting or separating with the first metal spring and the second metal spring.
[0010] Optionally, the first metal spring sheet and the second metal spring sheet are respectively connected with wiring bolts, the shell is provided with wiring holes corresponding to the wiring bolts respectively, and the wiring holes are provided with sealing gaskets.
[0011] Optionally, the shell has an open slot, the movable block is arranged in the open slot, the plug-in is used to be inserted into the open slot to squeeze the movable block, and the movable block is reset when the plug-in is separated from the open slot.
[0012] The anti-disconnection safety switch provided by the present application has a housing with a movable block, an elastic telescopic component and an elastic contact piece, the movable block is elastically connected to the housing, one end of the elastic telescopic component is connected to the movable block, and the other end is provided with a contact bridge, and the elastic contact piece is connected to the housing; when the plug-in squeezes the movable block, it can drive the contact bridge to move toward the elastic contact piece, and when the contact bridge contacts the elastic contact piece, it squeezes the elastic contact piece to an elastic deformation state, and the elastic telescopic component can be in an elastic contraction state after the contact bridge contacts the elastic contact piece; in the reset activity after the squeezing of the movable block is cancelled, the elastic telescopic component and the elastic contact piece reset activity to keep the contact bridge in contact with the elastic contact piece, until the reset activity of the elastic telescopic component and the elastic contact piece ends, and the contact bridge is separated from the elastic contact piece. In this way, even if the switch shakes, the reset activity of the elastic telescopic component and the elastic contact piece can compensate for the shaking stroke of the switch, so that the contact bridge and the elastic contact piece keep in contact and will not disconnect, effectively avoiding the easy disconnection of the switch caused by the shaking of the elevator, the door picking and the short stroke, and ensuring the safe operation of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the implementation of the present application, the following is a brief introduction to the relevant drawings. It is understood that the drawings described below are only used to illustrate some implementations of the present application, and those skilled in the art can also obtain many other technical features and connection relationships not mentioned in this document based on these drawings.
[0014] Figure 1 This is a schematic diagram of the internal structure of the anti-disconnection safety switch of this application; Figure 2 Schematic diagram of the anatomy of the anti-disconnection safety switch for this application; Figure 3 This is a schematic diagram of the appearance of the anti-disconnection safety switch of this application; Figure 4 This is a schematic diagram of the structure of the elastic telescopic component of the anti-disconnection safety switch of the present application; Figure 5 This is a schematic diagram of the structure of the anti-disconnection safety switch of the present application in a non-contact state when being squeezed and moved; Figure 6 This is a schematic diagram of the structure of the anti-disconnection safety switch of the present application when it is squeezed and moved to the contact state; Figure 7 This is a schematic diagram of the structure of the anti-disconnection safety switch of this application that remains in contact during the reset activity.
[0015] Description of reference numerals: 100, housing; 101, first chamber; 102, second chamber; 103, partition; 104, opening slot; 105, wiring hole; 110, fixing bolt; 200, movable block; 201, first spring; 202, positioning column; 300, elastic telescopic component; 310, movable rod; 311, buckle; 320, sleeve rod; 321, slide groove; 330, second spring; 340, strong breaking lock hook; 400, contact bridge; 500, elastic contact piece; 501, first metal spring; 502, second metal spring; 510, connection bolt; 600, protective cap; 700, sealing gasket; 800, protective plug; 900, plug-in; 901, mounting base; 902, plug. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0017] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0018] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.
[0019] The present disclosure will be described below with reference to the accompanying drawings, wherein the accompanying drawings illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in a variety of different ways and is not limited to the embodiments described below; it should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.
[0020] The technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application.
[0021] This embodiment provides an anti-disconnection safety switch, which can be used in the control circuit of an elevator door to cooperate with a charger to verify the in-place status of the elevator door and the locked status of the door lock.
[0022] like Figure 1 As shown, the switch has a housing 100 and a plug-in 900 matched with the housing 100, and the plug-in 900 can move relative to the housing 100 to be inserted into the housing 100. A movable block 200 is arranged inside the housing 100, and the movable block 200 is elastically connected to the internal structure of the housing 100, and the movable block 200 is connected to the outside of the housing 100. The plug-in 900 squeezes the movable block 200 from the outside of the housing 100 to make the movable block 200 shrink, and when the squeezing is cancelled, the movable block 200 will automatically reset due to its elasticity.
[0023] An elastic telescopic component 300 is also provided inside the housing 100. One end of the elastic telescopic component 300 is connected to the movable block 200, and the other end is provided with a contact bridge 400. When the movable block 200 is squeezed and moved, the elastic telescopic component 300 also moves with the movable block 200. In this embodiment, the elastic telescopic component 300 has an elastic telescopic function along its axial direction. When both ends of the elastic telescopic component 300 are squeezed, the elastic telescopic component 300 can elastically shrink. When the squeezing of at least one end is cancelled, the elastic telescopic component 300 will elastically reset and move.
[0024] In the present embodiment, an elastic contact piece 500 is further provided in the shell 100, and the elastic contact piece 500 is connected to the internal structure of the shell 100. The elastic contact piece 500 itself is elastic and can bend or deform when squeezed and has elastic potential energy. When the squeezing is cancelled, the elastic contact piece 500 will reset due to the elastic potential energy.
[0025] In one embodiment, the movable block 200 can be elastically connected to the internal structure of the shell 100 through elastic parts such as springs; the elastic telescopic component 300 at least includes a spring or an elastic part similar to a spring, which can have an elastic force to automatically reset after being squeezed; the elastic contact part 500 can be a metal spring sheet, or an elastic part such as a spring can also be set, which can have an elastic force to automatically reset after being squeezed.
[0026] In this embodiment, when the movable block 200 is squeezed by the plug 900, it can drive the contact bridge 400 to move toward the elastic contact piece 500, and when the contact bridge 400 contacts the elastic contact piece 500, it squeezes the elastic contact piece 500 to an elastic deformation state, and the elastic telescopic assembly 300 can be in an elastic contraction state after the contact bridge 400 contacts the elastic contact piece 500. When the movable block 200 squeezes the contact bridge 400 and the elastic contact piece 500, both the elastic contact piece 500 and the elastic telescopic assembly 300 have elastic potential energy.
[0027] After the plug-in 900 exits the housing 100 and the extrusion of the movable block 200 is cancelled, the movable block 200 will reset due to the elastic force. During the reset of the movable block 200, the movable block 200 moves and drives the elastic telescopic component 300 to move along its axial direction. Since the axial pressure of the elastic telescopic component 300 is reduced, the elastic potential energy of the elastic telescopic component 300 is released, so that the elastic telescopic component 300 performs a reset activity. The reset activity of the elastic telescopic component 300 pushes the contact bridge 400 toward the elastic contact piece 500, which is conducive to the contact bridge 400 and the elastic contact piece 500 to maintain contact.
[0028] Similarly, as the squeezing force of the movable block 200 decreases and the elastic telescopic component 300 resets, the pressure applied by the contact bridge 400 to the elastic contact piece 500 gradually decreases. At this time, the elastic potential energy of the elastic contact piece 500 is released, and the elastic contact piece 500 begins to reset from the elastic deformation state. The elastic contact piece 500 moves toward the direction of the contact bridge 400, which is conducive to the contact bridge 400 and the elastic contact piece 500 maintaining contact.
[0029] In this embodiment, the movable stroke of the movable block 200 is greater than the movable stroke of the elastic telescopic component 300 and the elastic contact piece 500, so that the stroke of the elastic telescopic component 300 and the elastic contact piece 500 ends before the stroke of the movable block 200 ends. In this way, after the strokes of the elastic telescopic component 300 and the elastic contact piece 500 end, the movable block 200 continues to reset, so that the contact bridge 400 is separated from the elastic contact piece 500, thereby achieving the disconnection effect of the switch.
[0030] In this embodiment, the contact bridge 400 and the elastic contact piece 500 are both made of conductive materials, and the contact bridge 400 and the elastic contact piece 500 are respectively connected to wires. When the contact bridge 400 and the elastic contact piece 500 are in contact, the circuit of the switch is connected, and when the contact bridge 400 and the elastic contact piece 500 are separated, the circuit of the switch is disconnected.
[0031] Of course, in some embodiments, the elastic contact member 500 may be two unit components, which are respectively connected to wires, and the contact bridge 400 can move to contact or disconnect with the two unit components at the same time, thereby achieving circuit connection or disconnection between the two unit components.
[0032] In the reset activity of the movable block 200 of this embodiment, the movable travel of the contact bridge 400 and the elastic contact piece 500 in the separation direction is compensated by the reset activity of the elastic telescopic component 300 and the elastic contact piece 500. The double reset travel of the elastic telescopic component 300 and the elastic contact piece 500 provides double protection for preventing the contact bridge 400 and the elastic contact piece 500 from separating. When the switch shakes, the elastic telescopic component 300 and the elastic contact piece 500 reset with the switch shaking, so that the contact bridge 400 and the elastic contact piece 500 maintain contact and will not be disconnected, effectively avoiding the easy disconnection of the switch caused by elevator shaking, door picking and short travel, and ensuring the safe operation of the elevator.
[0033] In this embodiment, the elastic force of the elastic contact 500 in the elastic deformation state is less than the elastic force of the elastic telescopic component 300 in the elastic contraction state. In this way, during the reset activity, the elastic telescopic component 300 will reset first, and when the elastic telescopic component 300 resets, the elastic contact 500 remains fixed and is still in the maximum elastic deformation state. The elastic force of the elastic telescopic component 300 gradually decreases with the reset activity, but is still greater than the elastic force of the elastic contact 500, until the reset activity of the elastic telescopic component 300 ends, the movable block 200 continues to move with the elastic telescopic component 300, at this time, the pressure on the elastic contact 500 is reduced, and when the pressure is less than the maximum elastic force of the elastic contact 500 in the elastic deformation state, the elastic contact 500 begins to reset. In the above process, the contact bridge 400 always keeps in contact with the elastic contact 500 until the elastic contact 500 resets to the initial position, the elastic force disappears, the contact bridge 400 continues to move with the movable block 200, the contact bridge 400 is separated from the elastic contact 500, and the switch is disconnected.
[0034] For example, see Figures 5 to 7 The elastic expansion component 300 uses a compression spring, one end of which is in contact with the movable block 200, and the other end is connected to the contact bridge 400. The elastic contact member 500 uses a metal spring, which is arranged in pairs, one end of which is installed on the inner wall of the housing 100, and the other end is a free end for contacting the contact bridge 400.
[0035] In the field of electrical switches, the elastic force of compression springs and metal domes is generally between 0.5N and 20N. In this embodiment, the minimum elastic force of the compression spring is set at 5N, and the maximum elastic force of the metal dome is set at 4N. During the reset activity, the compression spring will reset first, and the metal dome will remain fixed. The elastic force of the compression spring will gradually decrease with the reset activity until the reset activity of the compression spring ends. The movable block 200 continues to move with the compression spring. At this time, the pressure on the metal dome decreases. When the pressure is less than 4N, the metal dome starts to reset until the metal dome resets to the initial position and the elastic force disappears. Then the movable block 200 continues to move and the switch is disconnected.
[0036] In this embodiment, the elastic telescopic component 300 is reset first and the elastic contact member 500 is reset later, which effectively increases the reset travel of each component of the switch, so that the switch can adapt to a larger shaking travel without disconnecting. In addition to the small shaking caused by the movement of the elevator itself, the switch of this embodiment can also adapt to the displacement of the elevator by a certain distance caused by the door being pried open, thereby avoiding the risk of the elevator switch being disconnected due to the door being pried open, and further ensuring the safe operation of the elevator.
[0037] In one embodiment, the elastic force of the elastic contact 500 in the elastic deformation state is less than the maximum elastic force of the elastic telescopic component 300 in the elastic contraction state, and is greater than the minimum elastic force of the elastic telescopic component 300 in the elastic contraction state. In this way, during the reset activity, the elastic telescopic component 300 will reset first, and at this time, the elastic contact 500 remains fixed and is still in the maximum elastic deformation state. During the reset activity of the elastic telescopic component 300, the elastic force of the elastic telescopic component 300 will gradually decrease. When the elastic force of the elastic telescopic component 300 is reduced to a value close to the elastic force of the elastic contact 500, the elastic contact 500 starts the reset activity. At this time, the elastic telescopic component 300 and the elastic contact 500 are synchronously reset. When the reset activities of both the elastic telescopic component 300 and the elastic contact 500 are completed, as the contact bridge 400 continues to move with the movable block 200, the contact bridge 400 separates from the elastic contact 500, and the switch is disconnected.
[0038] For example, see Figures 5 to 7 As shown, similarly, the elastic telescopic component 300 adopts a compression spring, and the elastic contact member 500 adopts a metal spring, and the arrangement method is the same as above.
[0039] In this embodiment, the minimum elastic force of the compression spring is set at 5N, and the maximum elastic force is set at 10N, and the maximum elastic force of the metal dome is set at 8N. During the reset activity, the compression spring will reset first, and the elastic force of the compression spring will gradually decrease from 10N. Before it decreases to 8N, the metal dome remains fixed; when the elastic force of the compression spring is less than 8N, the metal dome begins to reset. At this stage, the compression spring and the metal dome are resetting at the same time. When one of them finishes the reset activity first, the other one will also finish the reset activity, or the compression spring and the metal dome will both finish the reset activity at the same time, and then the movable block 200 continues to move, and the switch is disconnected.
[0040] For this embodiment, the longer stroke of the elastic telescopic component 300 and the elastic contact piece 500 is naturally conducive to the above-mentioned keeping the contact bridge 400 in contact with the elastic contact piece 500. However, due to the small space near the elevator door, there is a requirement for the volume of the switch. The longer stroke causes the switch to require a larger volume, which makes it impossible to install the switch. In this embodiment, by making the elastic contact piece 500 start the reset activity during the reset process of the elastic telescopic component 300, while ensuring that the contact bridge 400 and the elastic contact piece 500 remain in contact, the reset stroke of the elastic telescopic component 300 is shortened to a certain extent, so the switch can be designed with a smaller volume, which is more in line with the actual application environment of the elevator door.
[0041] like Figure 2 As shown, in one embodiment, a partition 103 is provided inside the shell 100, and the partition 103 divides the inside of the shell 100 into a first chamber 101 and a second chamber 102 arranged up and down. A channel is provided on the surface of the partition 103, and the channel connects the first chamber 101 and the second chamber 102.
[0042] The movable block 200 is disposed in the first chamber 101 , the elastic telescopic component 300 extends from the first chamber 101 through a channel to the second chamber 102 , and the contact bridge 400 and the elastic contact member 500 are disposed in the second chamber 102 .
[0043] In this embodiment, the contact bridge 400 and the elastic contact member 500 are used as conductive components, so the second chamber 102 is isolated from the first chamber 101. Figure 2 As shown, a protective cap 600 is sleeved on the elastic telescopic component 300, and one end of the protective cap 600 is connected to the partition 103. The protective cap 600 is a flexible member that can adapt to the movement of the elastic telescopic component 300, thereby sealing the channel, ensuring the sealing of the second chamber 102, and achieving dustproof and waterproof effects.
[0044] Of course, the protective cap 600 can also be replaced by a sealing element such as a sealing ring, as long as the channel opening can be sealed and the normal activity of the elastic telescopic component 300 is met. This embodiment does not make the sole limitation.
[0045] like Figure 1 and Figure 2 As shown, the elastic member arranged between the movable block 200 and the shell 100 of this embodiment is a first spring 201. The first spring 201 is arranged in pairs on both sides of the elastic telescopic component 300 and is consistent with the telescopic direction of the elastic telescopic component 300, and is used to drive the reset activity of the movable block 200.
[0046] Specifically, Figure 4 As shown, the movable block 200 has two positioning posts 202, one end of the first spring 201 is sleeved on the positioning posts 202 to prevent it from being separated from the movable block 200, and the other end of the first spring 201 can abut against the partition 103, and a structure similar to the positioning posts 202 or a spring mounting groove can be provided on the partition 103 to better fix the first spring 201.
[0047] like Figure 4 As shown, in one embodiment, the elastic telescopic component 300 includes a movable rod 310 and a sleeve rod 320, one end of the movable rod 310 is connected to the movable block 200, and the other end extends into the sleeve rod 320, and a second spring 330 is provided in the sleeve rod 320 to abut between the sleeve rod 320 and the movable rod 310, and the second spring 330 is the elastic source that provides the resetting activity for the elastic telescopic component 300.
[0048] The surface of the sleeve rod 320 has a slide groove 321 arranged along the extension direction of the second spring 330, and the movable rod 310 has a buckle 311, which can be slidably limited in the slide groove 321. The limited sliding cooperation between the buckle 311 and the slide groove 321 realizes the limitation of the sliding distance of the movable rod 310 and the sleeve rod 320, and can prevent the relative rotation of the two. When the second spring 330 is extended to the maximum distance, the buckle 311 abuts against the edge of the slide groove 321, and the movable rod 310 can pull the sleeve rod 320 to move, preventing the movable rod 310 from being separated from the sleeve rod 320.
[0049] The contact bridge 400 is disposed at one end of the sleeve rod 320 away from the movable rod 310 so as to be close to the elastic contact member 500 .
[0050] In one embodiment, the elastic contact member 500 includes a first metal spring 501 and a second metal spring 502, and the first metal spring 501 and the second metal spring 502 are respectively arranged on both sides of the axis of the elastic telescopic component 300. When the contact bridge 400 contacts and presses the first metal spring 501 and the second metal spring 502, the force balance of the elastic telescopic component 300 can be ensured, the movement resistance of the elastic telescopic component 300 can be reduced, and the elastic telescopic component 300 can be prevented from being offset.
[0051] The contact bridge 400 connects or disconnects the circuit between the first metal spring 501 and the second metal spring 502 by contacting or separating with the first metal spring 501 and the second metal spring 502 .
[0052] like Figure 1 and Figure 2 As shown, the first metal spring 501 and the second metal spring 502 are respectively connected to the connecting bolts 510 , and the housing 100 is provided with connecting holes 105 corresponding to the connecting bolts 510 , and the external wires extend into the connecting bolts 510 through the connecting holes 105 for installation.
[0053] like Figure 1 As shown, in one embodiment, one wiring bolt 510 can correspond to two wiring holes 105 on the housing 100, that is, wiring holes 105 are respectively provided on two sides of a corner of the housing 100. In actual use, one of the wiring holes 105 can be selected for wiring according to the requirements of the installation orientation, which improves the convenience of switch wiring.
[0054] like Figure 1 and Figure 2 As shown, further, a sealing gasket 700 is provided at the wiring hole 105, and the sealing gasket 700 seals the second chamber 102 to prevent dust and water.
[0055] A through hole is also provided on the surface of the shell 100 corresponding to the wiring bolt 510, through which the wiring bolt 510 can be installed and removed. A protective plug 800 is provided in the through hole. After the wiring bolt 510 is installed and fixed, the protective plug 800 blocks the through hole to seal the second chamber 102.
[0056] like Figure 1 and Figure 2 As shown, two fixing bolts 110 are provided on the housing 100, which are used to install the housing 100 on the corresponding installation position of the elevator door to achieve installation and fixation of the switch.
[0057] In this embodiment, the top of the first chamber 101 is in communication with the outside, so that the movable block 200 can be exposed to the outside, and the movable block 200 can be squeezed and moved by an external object.
[0058] like Figure 3 As shown, the anti-disconnection safety switch of this embodiment further includes an independent plug-in 900. The switch body (i.e., the housing 100) is installed on one elevator door, and the plug-in 900 is installed on the other elevator door. When the two elevator doors are closed, the plug-in 900 extends into the housing 100 to squeeze the movable block 200, so as to realize the movement of the movable block 200 as described above.
[0059] Specifically, the shell 100 has an opening groove 104, which is connected to the first chamber 101. The movable block 200 can be said to be arranged in the opening groove 104, or it can be said to be arranged in the first chamber 101, and is connected to the outside through the opening groove 104. The plug-in 900 moves with the elevator door to be inserted into the opening groove 104 to squeeze the movable block 200. The movable block 200 is reset and movable during the process of the plug-in 900 being separated from the opening groove 104.
[0060] like Figure 3 As shown, the plug-in 900 is composed of a mounting seat 901 and a plug 902. The mounting seat 901 is used to be fixed on the elevator door. One end of the plug 902 is fixed to the mounting seat 901, and the other end extends toward the direction of the housing 100. The end of the plug 902 has a section of abutment portion, and the movable block 200 also has a section of abutment portion. When the two are in contact, they abut to transmit the thrust of the plug-in 900.
[0061] In this embodiment, certain requirements may be imposed on the distance that the plug 902 extends out of the mounting seat 901. The distance that the plug 902 extends out of the mounting seat 901 should meet the travel required for the elastic telescopic component 300 to move, that is, the plug 902 ensures that the elastic telescopic component 300 and the elastic contact member 500 can reach the required travel when squeezing the movable block 200. When the distance that the plug 902 extends out meets the travel required by the movable block 200, the mounting seat 901 abuts against the housing 100 to prevent the plug 902 from extending further, thereby preventing the plug 902 from being inserted too deeply and damaging the internal structure of the switch.
[0062] like Figure 2 As shown, the elastic expansion component 300 of this embodiment is also provided with a strong breaking hook 340, which is engaged with the plug 902 when the plug 902 is inserted. When the spring inside the switch fails and the components cannot realize the reset activity, the plug 902 can be pulled out, and the plug 902 drives the strong breaking hook 340 to realize the reset function of the spring, so that the switch is manually disconnected to ensure safety.
[0063] Since the use of the strong breaking lock hook 340 is common knowledge in the art, the specific structure and principle of the strong breaking lock hook 340 are not described in detail in this embodiment.
[0064] The following will be combined with the attached Figures 5 to 7 The movement process of this embodiment is further explained.
[0065] In the figure, the partition 103 can be understood as the housing 100. After the housing 100 is fixed, the partition 103 is not fixed. The first metal spring 501 and the second metal spring 502 are connected to the wires respectively, and the first metal spring 501 and the second metal spring 502 are not in contact. In this embodiment, the switch is powered on and off by the contact bridge 400 being in contact or separated from the first metal spring 501 and the second metal spring 502 at the same time.
[0066] like Figure 5 As shown, before the switch is powered on, the contact bridge 400 maintains a certain distance from the first metal spring 501 and the second metal spring 502. As the movable block 200 is squeezed, the first spring 201 contracts, and the movable block 200, the elastic expansion assembly 300 and the contact bridge 400 all move toward the side where the first metal spring 501 and the second metal spring 502 are located. The arrow in the figure indicates the moving direction. During this process, the second spring 330, the first metal spring 501 and the second metal spring 502 are not subjected to pressure and therefore will not deform.
[0067] like Figure 6 As shown, when the contact bridge 400 moves to contact both the first metal spring 501 and the second metal spring 502, the switch is energized. The contact bridge 400 is squeezed to cause the second spring 330 to shrink and deform, and the first metal spring 501 and the second metal spring 502 are also squeezed to elastically deform to one side. When the movable block 200 continues to move, the arrow in the figure indicates the moving direction, the first spring 201 continues to shrink, the contact bridge 400, the first metal spring 501 and the second metal spring 502 respectively continue to store elastic potential energy, and the overall length of the elastic telescopic component 300 shrinks.
[0068] like Figure 7 As shown, when the elevator shakes or the door is pulled open, the extrusion pressure of the movable block 200 changes due to the relative movement of the door. When the external extrusion pressure on the movable block 200 becomes smaller, the first spring 201 starts to reset and push the movable block 200 to move in the opposite direction. The arrow in the figure indicates the movement direction. At this time, the movable rod 310 of the elastic telescopic component 300 moves in the opposite direction with the movable block 200. Since the force on the other end of the second spring 330 remains unchanged, the second spring 330 resets and extends the overall length of the elastic telescopic component 300. The elongation of the elastic telescopic component 300 makes up for the displacement difference caused by the shaking, so that the contact bridge 400 can maintain contact with the first metal spring 501 and the second metal spring 502.
[0069] like Figure 7As shown, as the shaking intensifies, the movable block 200 continues to move outward, and the elastic force of the second spring 330 gradually decreases due to the reset movement. When the reset activity of the second spring 330 is completed, or the elastic force of the second spring 330 during the reset activity is close to the elastic force of the first metal spring 501 and the second metal spring 502, the first metal spring 501 and the second metal spring 502 also start the reset activity. The reset activity of the first metal spring 501 and the second metal spring 502 compensates for the displacement difference caused by the intensified shaking, and further maintains the contact between the contact bridge 400 and the first metal spring 501 and the second metal spring 502.
[0070] Until the reset activities of the second spring 330 and the first and second metal springs 501 and 502 are completed, the first spring 201 pushes the movable block 200 to continue to move outward, at which time the contact bridge 400 is separated from the first and second metal springs 501 and 502, and the switch is disconnected.
[0071] Therefore, this embodiment compensates for the displacement difference caused by the shaking of the elevator in a double-stroke manner through the elastic reset of the second spring 330 and the first metal dome 501 and the second metal dome 502, thereby ensuring continuous contact and disconnection of the switch within a certain acceptable range of motion, effectively avoiding the easy disconnection of the switch caused by elevator shaking, door prying and short stroke, and ensuring the safe operation of the elevator.
[0072] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. An anti-disconnection safety switch, characterized in that: The invention comprises a housing (100) and a plug-in unit (900), wherein the housing (100) is provided with: A movable block (200) elastically connected to the housing (100); An elastic telescopic component (300), one end of which is connected to the movable block (200) and the other end of which is provided with a contact bridge (400); An elastic contact piece (500) connected to the housing (100); The plug-in unit (900) is used to be inserted into the housing (100) to press the movable block (200); When the movable block (200) is squeezed, it can drive the contact bridge (400) to move towards the elastic contact piece (500), and when the contact bridge (400) contacts the elastic contact piece (500), it squeezes the elastic contact piece (500) to an elastic deformation state, and the elastic telescopic component (300) can be in an elastic contraction state after the contact bridge (400) contacts the elastic contact piece (500); During the reset activity after the squeezing of the movable block (200) is cancelled, the elastic telescopic component (300) and the elastic contact piece (500) are reset so that the contact bridge (400) and the elastic contact piece (500) remain in contact with each other, until the reset activity of the elastic telescopic component (300) and the elastic contact piece (500) is completed and the contact bridge (400) and the elastic contact piece (500) are separated; The elastic force of the elastic contact piece (500) in the elastic deformation state is smaller than the elastic force of the elastic telescopic component (300) in the elastic contraction state, so that when the elastic telescopic component (300) is in the resetting activity, the elastic contact piece (500) remains fixed until the resetting activity of the elastic telescopic component (300) ends, and then the elastic contact piece (500) is resetting; or, The elastic force of the elastic contact piece (500) in the elastic deformation state is smaller than the maximum elastic force of the elastic telescopic component (300) in the elastic contraction state, and is larger than the minimum elastic force of the elastic telescopic component (300) in the elastic contraction state, so that when the elastic telescopic component (300) is in the resetting activity, the elastic contact piece (500) starts the resetting activity.
2. The anti-disconnection safety switch according to claim 1, characterized in that: A first chamber (101) and a second chamber (102) are formed inside the housing (100) via a partition (103); a channel is provided on the surface of the partition (103); the elastic telescopic component (300) extends from the first chamber (101) through the channel to the second chamber (102); and the contact bridge (400) and the elastic contact piece (500) are provided in the second chamber (102).
3. The anti-disconnection safety switch according to claim 2, characterized in that: A protective cap (600) is sleeved on the elastic telescopic component (300), one end of the protective cap (600) is connected to the partition plate (103), and the protective cap (600) is used to seal the channel.
4. The anti-disconnection safety switch according to claim 1, characterized in that: A first spring (201) is provided between the movable block (200) and the housing (100); the first springs (201) are provided in pairs on both sides of the elastic telescopic component (300) and are consistent with the telescopic direction of the elastic telescopic component (300), and are used to drive the resetting movement of the movable block (200).
5. The anti-disconnection safety switch according to claim 1, characterized in that: The elastic telescopic assembly (300) comprises a movable rod (310) and a sleeve rod (320); one end of the movable rod (310) is connected to the movable block (200), and the other end extends into the sleeve rod (320); a second spring (330) is arranged in the sleeve rod (320) and abuts between the sleeve rod (320) and the movable rod (310); a sliding groove (321) is arranged along the expansion and contraction direction of the second spring (330) on the surface of the sleeve rod (320); a buckle (311) is provided on the movable rod (310); the buckle (311) can be slidably limited in the sliding groove (321); and one end of the sleeve rod (320) away from the movable rod (310) is connected to the contact bridge (400).
6. The anti-disconnection safety switch according to claim 1, characterized in that: The elastic contact member (500) comprises a first metal spring (501) and a second metal spring (502); the first metal spring (501) and the second metal spring (502) are respectively arranged on both sides of an axis of the elastic telescopic component (300); the contact bridge (400) realizes circuit connection or disconnection between the first metal spring (501) and the second metal spring (502) by contacting or separating with the first metal spring (501) and the second metal spring (502).
7. The anti-disconnection safety switch according to claim 6, characterized in that: The first metal spring (501) and the second metal spring (502) are respectively connected to connection bolts (510); the housing (100) is provided with connection holes (105) respectively corresponding to the connection bolts (510); and sealing gaskets (700) are provided at the connection holes (105).
8. The anti-disconnection safety switch according to any one of claims 1 to 7, characterized in that: The housing (100) has an opening slot (104), the movable block (200) is arranged in the opening slot (104), the plug-in unit (900) is used to be inserted into the opening slot (104) to squeeze the movable block (200), and the movable block (200) is reset and movable during the process of the plug-in unit (900) being separated from the opening slot (104).