A bistable elevator travel switch device

Abstract

The present invention relates to a bistable travel switch device, comprising: a travel switch and a pair of switch blades. The travel switch is installed on the inner wall of the hoistway, and the two switch blades are respectively installed on both sides of one end of the car close to the inner wall of the hoistway where the travel switch is located. The travel switch includes a hollow housing and a connecting rod assembly rotatably connected to the housing at one end, and a roller is provided at the other end of the connecting rod assembly. Two static contacts are fixedly arranged in the housing, a driving block is fixedly connected to the part of the connecting rod assembly located in the housing, and two moving contacts are respectively connected to both ends of the driving block. A holding device is also arranged in the housing for restricting the rotation of the connecting rod assembly and keeping the connecting rod assembly at two preset positions. When the connecting rod assembly is at one of the preset positions, one group of moving contacts is connected to the static contacts through the movement of the driving block. When the connecting rod assembly is at the other preset position, the other group of moving contacts is connected to the static contacts through the movement of the driving block.

Description

Technical Field

[0001] The present invention relates to a bistable elevator travel switch device, belonging to the technical field of elevator control travel switches. Background Art

[0002] Traditional travel switches for controlling the operation of the car are installed on the inner wall of the hoistway and cooperate with a several-meter-long striker installed on the car. When the striker presses on the roller of the travel switch, the travel switch is triggered, and when it leaves, the travel switch automatically resets. Therefore, a long striker is required, and there are problems of misoperation during the working process. Moreover, when the striker presses on the roller for a long time during work, it will affect the service life of the travel switch. Summary of the Invention

[0003] In order to solve the problems existing in the above-mentioned prior art, the present invention proposes a bistable elevator travel switch device.

[0004] The technical solution of the present invention is as follows:

[0005] On the one hand, the present invention provides a bistable travel switch device, including:

[0006] A travel switch and a pair of switch blades. The travel switch is installed on the inner wall of the hoistway, and the two switch blades are respectively installed on both sides of one end of the car close to the inner wall of the hoistway where the travel switch is located, and are arranged vertically offset.

[0007] The travel switch includes a hollow housing and a connecting rod assembly disposed outside the housing and extending into the housing at one end and rotatably connected to the housing. The other end of the connecting rod assembly is provided with at least one roller, and the roller is used to cooperate with the two switch blades by impact, and at any moment, the roller only cooperates with one of the switch blades; two static contacts are fixedly arranged in the housing, a driving block is fixedly connected to the part of the connecting rod assembly located in the housing, and two moving contacts are respectively connected to both ends of the driving block; a holding device is also arranged in the housing, and the holding device is used to limit the rotation of the connecting rod assembly and keep the connecting rod assembly in one of two preset positions in a steady state. Moreover, whenever the roller impacts with a switch blade, the connecting rod assembly switches from the current preset position to the other preset position; when the connecting rod assembly is in one of the preset positions, one group of moving contacts is connected to the static contacts through the movement of the driving block, and when the connecting rod assembly is in the other preset position, the other group of moving contacts is connected to the static contacts through the movement of the driving block.

[0008] As a preferred embodiment, the connecting rod assembly includes a first connecting rod, a first rotating shaft and a second rotating shaft. The first rotating shaft passes through the housing and is rotatably connected to the housing. One end of the first connecting rod is fixedly connected to the part of the first rotating shaft located outside the housing, the other end of the first connecting rod is fixedly connected to the second rotating shaft, and the roller is sleeved on the second rotating shaft and rotatably connected to the second rotating shaft.

[0009] Alternatively, the connecting rod assembly includes a second connecting rod, a third rotating shaft, a fourth rotating shaft, and a fifth rotating shaft. The third rotating shaft is inserted through the housing and rotatably connected to the housing. One end of the second connecting rod is fixedly connected to the portion of the first rotating shaft outside the housing. The other end of the second connecting rod forms a "Y" - shaped fork. The fourth rotating shaft and the fifth rotating shaft are respectively fixedly connected to the two fork ends of the other end of the second connecting rod. Two rollers are sleeved on the fourth rotating shaft and the fifth rotating shaft respectively and are rotatably connected to the fourth rotating shaft and the fifth rotating shaft, and the two rollers do not interfere with each other.

[0010] As a preferred embodiment, the holding device includes two first magnetic poles which are respectively arranged at both ends of the driving block; a iron - made cover door is arranged at the opening of the housing. The first magnetic poles are used to cooperate with the cover door to limit the movement of the driving block, thereby limiting the rotation of the connecting rod assembly; when the connecting rod assembly is in one of the preset positions, one of the first magnetic poles is attracted to the cover door, and when the connecting rod assembly is in the other preset position, the other first magnetic pole is attracted to the cover door.

[0011] Alternatively, the holding device includes a second magnetic pole and an iron bracket. The second magnetic pole is fixedly connected to the portion of the connecting rod assembly inside the housing through a connecting block; the iron bracket is fixedly arranged inside the housing, and both ends of the iron bracket extend towards the middle of the housing and surround both sides of the second magnetic pole. When the connecting rod assembly is in one of the preset positions, the second magnetic pole is attracted to one side of the iron bracket, and when the connecting rod assembly is in the other preset position, the second magnetic pole is attracted to the other side of the iron bracket.

[0012] Alternatively, the holding device includes a jacking device fixedly arranged on the portion of the connecting rod assembly inside the housing and a limiting portion arranged on the inner wall of the housing. The jacking device includes a sleeve, a spring, and a ejector rod. One end of the sleeve is open, and it is fixedly arranged on the portion of the connecting rod assembly inside the housing with the open end facing the limiting portion. The spring is sleeved between the sleeve and the ejector rod and is always in a compressed state;

[0013] The limiting portion has a structure that is high in the middle and low on both sides, and the high position faces the jacking device.

[0014] Among them, the limiting portion is "V" - shaped, and concave arcs are formed on the two hypotenuses of the "V" - shape towards the inner wall of the housing.

[0015] Among them, the movable end of the ejector rod located outside the sleeve is set to be hemispherical.

[0016] As a preferred embodiment, two reed pieces are connected to the driving block. One ends of the two reed pieces are fixedly connected to the driving block, and the other ends are respectively fixedly connected to two moving contacts.

[0017] On the other hand, the present invention also provides a bistable travel switch device, comprising:

[0018] A travel switch and a switch blade, wherein the travel switch is installed on the inner wall of the hoistway, and the switch blade is installed at one end of the car close to the inner wall of the hoistway where the travel switch is located;

[0019] The travel switch includes a hollow housing and a connecting rod assembly disposed outside the housing and extending into the housing at the middle and rotatably connected to the housing. Both ends of the connecting rod assembly are provided with rollers, and the two rollers are used to cooperate with the switch blade, and at any moment, the switch blade only cooperates with one of the rollers; Two static contacts are fixedly arranged in the housing, a driving block is fixedly connected to the part of the connecting rod assembly located in the housing, and two moving contacts are respectively connected to both ends of the driving block; A holding device is also arranged in the housing, and the holding device is used to limit the rotation of the connecting rod assembly and keep the connecting rod assembly in one of two preset positions in the steady state. And whenever a roller collides with a switch blade, the connecting rod assembly switches from the current preset position to the other preset position. When the connecting rod assembly is in one of the preset positions, one set of moving contacts is connected to the static contacts through the movement of the driving block, and when the connecting rod assembly is in the other preset position, the other set of moving contacts is connected to the static contacts through the movement of the driving block.

[0020] The present invention has the following beneficial effects:

[0021] 1. For the bistable travel switch device of the present invention, through the cooperation of the switch blade, the roller and the holding device, the travel switch switches between two states. Immediately after the roller is hit by the switch blade, the travel switch switches to another state. It is not necessary for the switch blade to always press on the roller 13. This working method enables a relatively short switch blade to be used to cooperate with the roller, without the need to be set as long as the existing bumper, reducing the risk of misoperation and increasing the service life of the travel switch.

[0022] 2. For the bistable travel switch device of the present invention, the holding device is realized by the cooperation of a magnetic pole and an iron cover door. When the magnetic pole approaches the cover door, it will automatically attract, accurately holding the connecting rod assembly in a predetermined position and restricting its rotation.

[0023] 3. For the bistable travel switch device of the present invention, the holding device can also be realized by the cooperation of a magnetic pole and an iron bracket. When the magnetic pole approaches both sides of the iron bracket, it will automatically attract, and can also accurately hold the connecting rod assembly in a predetermined position and restrict its rotation. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the working principle of Embodiment One of the present invention;

[0025] Figure 2Schematic diagram of the structure of the travel switch in the first embodiment of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the driving block in the first embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the driving block from another perspective in the first embodiment of the present invention;

[0028] Figure 5 Schematic diagram of the structure of the travel switch in the second embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the structure of the driving block in the second embodiment of the present invention;

[0030] Figure 7 Schematic diagram of the structure of the holding device in the second embodiment of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the holding device in the third embodiment of the present invention;

[0032] Figure 9 Schematic diagram of the structure of the holding device in the fourth embodiment of the present invention;

[0033] Figure 10 Schematic diagram of the structure of the lifting device in the embodiment of the present invention;

[0034] Figure 11 Schematic diagram of the structure of another implementation manner of the holding device in the fourth embodiment of the present invention;

[0035] Figure 12 Schematic diagram of the structure of the travel switch in the fifth embodiment of the present invention;

[0036] Figure 13 Schematic diagram of the structure of the travel switch in the sixth embodiment of the present invention;

[0037] Figure 14 Schematic diagram of the working principle of the sixth embodiment of the present invention.

[0038] 1. Travel switch; 10 Door; 11 Housing; 12 Linkage assembly; 121 First link; 122 First rotating shaft; 123 Second rotating shaft; 124 Second link; 125 Third rotating shaft; 126 Fourth rotating shaft; 127 Fifth rotating shaft; 13 Roller; 14 Moving contact; 15 Static contact; 16 Driving block; 2 Switch blade; 31 Lifting device; 311 Sleeve; 312 Spring; 313 Thrust rod; 32 Limiting part; 33 First magnetic pole; 34 Second magnetic pole; 35 Iron bracket. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] It should be understood that the step numbers used in the text are only for convenient description and do not limit the execution order of the steps.

[0041] It should be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0042] The terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0043] The term " / and" refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0044] Embodiment 1:

[0045] See Figures 1 to 3 , this embodiment provides a bistable travel switch device, including:

[0046] A travel switch 1 and a pair of switch blades 2, specifically see Figure 1 , the travel switch 1 is installed on the inner wall of the hoistway, and the two switch blades 2 are installed on the support plate at one end of the top of the car close to the inner wall of the hoistway where the travel switch 1 is located, and the two switch blades are respectively fixedly installed on both sides of the support plate and are arranged vertically offset;

[0047] Specifically see Figure 2 , the travel switch 1 includes a hollow housing 11 and a connecting rod assembly 12 provided outside the housing 11 and extending to the inside of the housing 11 at one end and rotatably connected to the housing 11. The other end of the connecting rod assembly 12 is provided with at least one roller 13. The roller 13 is used for impact cooperation with the two switch blades 2, and at any time the roller 13 only cooperates with one of the switch blades 2, as Figure 1As shown, when the roller is on the left side, when the car moves downward from top to bottom, there is a certain distance between the switch blade 2 on the right side and the roller 13, and it will not hit the roller 13. After the car moves downward by a certain distance, the switch blade 2 on the left side will hit the roller 13, causing the connecting rod assembly 12 to drive the roller 13 to rotate to the right as a whole. When the car moves upward from bottom to top subsequently, the roller 13 approaches the right side. Therefore, when the car ascends, the switch blade 2 on the left side will not hit the roller 13, and instead, the switch blade 2 on the right side hits the roller 13, causing the roller 13 to rotate to the left again, and so on;

[0048] At the upper and lower ends inside the housing 11, two static contacts 15 are fixedly arranged respectively, as Figure 2 shown. One static contact 15 is composed of two contact pieces. The part of the connecting rod assembly 12 located inside the housing 11 is fixedly connected with a driving block 16. Two moving contacts 14 are respectively connected to both ends of the driving block 16. Similarly, one moving contact 14 is also composed of two contact pieces;

[0049] A holding device is also arranged inside the housing 11. The holding device is used to limit the rotation of the connecting rod assembly 12 and keep the connecting rod assembly 12 at one of the two preset positions in a steady state. And whenever the roller 13 hits a switch blade 2, the connecting rod assembly 12 switches from the current preset position to the other preset position; that is, through the holding device, the connecting rod assembly 12 will only be at one of the preset positions or the other preset position without external force (the roller 13 is not hit by the switch blade 2). Under the action of external force, the connecting rod assembly 12 will switch from the current position to the other preset position;

[0050] When the connecting rod assembly 12 is at one of the preset positions, one set of moving contacts 14 and the static contacts 15 are connected through the movement of the driving block 16. At this time, the bistable travel switch device is in one state; when the connecting rod assembly 12 is at the other preset position, the other set of moving contacts 14 and the static contacts 15 are connected through the movement of the driving block 16. At this time, the bistable travel switch device is in the other state.

[0051] Based on the above embodiments, in this embodiment, through the cooperation of the two switch blades 2, the roller 13 and the holding device, the travel switch 1 is switched between two states. Based on this embodiment, the travel switch 1 immediately switches to the other state after the roller 13 is hit, and it is not necessary for the switch blade 2 to always press on the roller 13. This working method enables the cooperation with the roller 13 to be achieved only with two relatively short switch blades 2, without the need to be set as long as the existing striking bows, reducing the risk of misoperation and increasing the service life of the travel switch 1.

[0052] Specifically refer to Figure 2, As a preferred embodiment of this embodiment, the connecting rod assembly 12 includes a first connecting rod 121 arranged parallel to the side surface of the housing 11, a first rotating shaft 122 passing through the housing 11 and rotatably connected to the housing 11. One end of the first connecting rod 121 is fixedly sleeved on the end of the first rotating shaft 122 located outside the housing 11. The other end of the first connecting rod 121 is fixedly provided with a second rotating shaft 123. The roller 13 is sleeved on the second rotating shaft 123 and rotatably connected to the second rotating shaft 123. The roller 13 can be sleeved on the second rotating shaft 123 through a bearing.

[0053] The driving block 16 is fixedly connected to the part of the rotating shaft 122 located inside the housing 11 by screws. A mounting groove is correspondingly formed on the first rotating shaft 122. The driving block 16 is symmetrically arranged up and down. Two moving contacts 14 are respectively connected to the upper and lower ends of the driving block.

[0054] Specifically refer to Figure 3 and Figure 4 , As a preferred embodiment of this embodiment, two reed pieces 17 are connected to the driving block 16. One ends of the two reed pieces 17 are fixedly connected to the driving block 16, and the other ends are respectively fixedly connected to the two moving contacts 14.

[0055] Embodiment Two:

[0056] Specifically refer to Figure 5 and Figure 6 , Different from Embodiment One, the housing 11 of this embodiment has openings at both the front and rear ends. The driving block 16 is symmetrically arranged on both sides of the first rotating shaft 122 in the front and rear directions; and the two static contacts 15 are both arranged at the lower end of the housing 11 with a certain distance apart; the two moving contacts 14 are respectively arranged on the front and rear sides of the driving block 16.

[0057] Specifically refer to Figure 7 , The holding device includes two first magnetic poles 33, and the two first magnetic poles 33 are respectively arranged at both ends of the driving block 16; an iron cover door 10 is arranged at the opening of the housing 11. The first magnetic poles 33 are used to cooperate with the cover door 10 to limit the movement of the driving block and thus limit the rotation of the connecting rod assembly 12; when the connecting rod assembly 12 is in one of the preset positions, one of the first magnetic poles 33 is attracted to the cover door 10, and when the connecting rod assembly 12 is in the other preset position, the other first magnetic pole 33 is attracted to the cover door 10.

[0058] The holding device is realized by the cooperation of the magnetic poles and the iron cover door 10. When the magnetic poles approach the cover door, they will automatically attract, accurately holding the connecting rod assembly in the predetermined position and restricting its rotation.

[0059] Embodiment Three:

[0060] Specifically refer to Figure 8, the difference between this embodiment and the second embodiment is that the holding device includes a second magnetic pole 34 and an iron bracket 35. The second magnetic pole 34 is fixedly connected to the part of the link assembly 12 located inside the housing 11 through a connecting block. The iron bracket 35 is fixedly arranged inside the housing 11, and both ends of the iron bracket 35 extend towards the middle of the housing 11 and surround both sides of the second magnetic pole 34. When the link assembly 12 is in one of the preset positions, the second magnetic pole 34 attracts to one side of the iron bracket 35. When the link assembly 12 is in the other preset position, the second magnetic pole 34 attracts to the other side of the iron bracket 35.

[0061] The holding device of this embodiment is realized by the cooperation of the second magnetic pole 34 and the iron bracket 35. When the second magnetic pole 34 approaches both sides of the iron bracket 35, it will automatically attract, and can also accurately hold the link assembly in a predetermined position and limit its rotation.

[0062] Embodiment Four:

[0063] Specifically refer to Figures 9 to 10 , the difference between this embodiment and the second and third embodiments is that when the housing 11 has an open front end and the driving block 16 is symmetrically arranged up and down on the first rotating shaft 122, the holding device includes a jacking device 31 fixedly arranged on the part of the link assembly 12 located inside the housing 11, that is, on the first rotating shaft 122, and a limiting part 32 arranged on the inner wall of the housing 11. Specifically, the jacking device 31 is perpendicular to the first rotating shaft 122 and is arranged at the end of the first rotating shaft 122 away from the opening of the housing 11. The limiting part 32 is arranged on the inner wall of the housing 11 away from the opening.

[0064] The jacking device 31 includes a sleeve 311, a spring 312 and a push rod 313. The sleeve 311 is fixedly arranged on the first rotating shaft 122 and one end of the sleeve 311 away from the first rotating shaft 122 is open, and its open end faces the limiting part 32. One end of the spring 312 is fixed to the inner end of the sleeve 311, and the other end is fixedly connected to one end of the push rod 313. The spring 312 is sleeved between the sleeve 311 and the push rod 313 and is always in a compressed state. In this way, the push rod 313 will always be pushed towards the limiting part 32 under the elastic force of the spring 312.

[0065] The limiting part 32 has a structure with a higher middle part and lower sides, and the higher position faces the lifting device 31. In this way, when the first rotating shaft 122 rotates, the ejector rod 313 also rotates accordingly. Since the limiting part 32 has a structure with a higher middle part and lower sides, after the ejector rod 313 deviates from the middle position of the limiting part 32, it will slide towards the side of the limiting part 32 until the edge position of the limiting part 32 under the action of elastic force. And under the action of elastic force, without external force, the first rotating shaft 122 cannot overcome the elastic force of the spring 312 to drive the ejector rod 313 to move towards the middle part of the limiting part 32. Therefore, through the lifting device 31 and the limiting part 32, the rotation of the first rotating shaft 122 will be restricted, and without the action of external force, the end of the ejector rod 313 will only be at the edge positions on both sides of the limiting part 32. Therefore, the first rotating shaft 122 can be maintained at one of the two preset positions.

[0066] As an implementation manner of this embodiment, the limiting part 32 is in a "V" shape, and the two hypotenuses of the "V" shape form a radian concave towards the inner wall of the housing 11. This can make the movement of the ejector rod 313 smoother, and when the ejector rod 313 moves from the edge of the limiting part to the middle part of the limiting part 32, the slope is relatively large, and external force must be applied to move.

[0067] As an implementation manner of this embodiment, the end of the ejector rod 313 relative to the inner end of the sleeve 311 is set to be spherical. In this way, it can prevent the ejector rod 313 from getting stuck in the middle part of the limiting part 32.

[0068] As another implementation manner of this embodiment, when the housing 11 has openings at both the front and rear ends and the driving blocks 16 are symmetrically arranged on both sides of the first rotating shaft 122 in the front and rear directions, see Figure 11 , the lifting device 31 is arranged at the upper end of the first rotating shaft 122, and the limiting part 32 is arranged on the inner wall of the top of the housing 11. The specific working principle is the same as that of the above embodiment and will not be elaborated here.

[0069] Embodiment Five:

[0070] Specifically see Figure 12 , the difference between this embodiment and Embodiment One is that the connecting rod assembly 12 includes a second connecting rod 124, a third rotating shaft 125, a fourth rotating shaft 126, and a fifth rotating shaft 127. The third rotating shaft 125 is passed through the housing 11 and is rotatably connected to the housing 11. One end of the second connecting rod 124 is fixedly connected to the part of the first rotating shaft 122 outside the housing 11. The other end of the second connecting rod 124 forms a "Y" - shaped fork. The fourth rotating shaft 126 and the fifth rotating shaft 127 are respectively fixedly connected to the two fork ends of the other end of the second connecting rod 124. Two rollers 13 are respectively sleeved on the fourth rotating shaft 126 and the fifth rotating shaft 127 and are rotatably connected to the fourth rotating shaft 126 and the fifth rotating shaft 127, and the two rollers 13 do not interfere with each other.

[0071] Embodiment Six:

[0072] Specifically refer to Figure 13 and Figure 14 , this embodiment provides another bistable travel switch device, including:

[0073] Travel switch 1 and switch blade 2, the travel switch 1 is installed on the inner wall of the hoistway, and the switch blade 2 is installed on the support plate at one end of the car close to the inner wall of the hoistway where the travel switch 1 is located;

[0074] The travel switch 1 includes a hollow housing 11 and a connecting rod assembly 12 disposed outside the housing 11 and extending into the housing 11 in the middle and rotatably connected to the housing 11. Both ends of the connecting rod assembly 12 are provided with rollers 13. The two rollers 13 are used to cooperate with the switch blade 2, and at any moment, the switch blade 2 only cooperates with one of the rollers 13. As shown in Figure 2 , when the lower roller is on the right side, when the car moves from top to bottom, there is a certain distance between the switch blade 2 and the upper roller 13 and it will not hit the upper roller 13. After the car displaces downward by a certain distance, the switch blade 2 will hit the lower roller 13, causing the connecting rod assembly 12 to drive the two rollers 13 to rotate clockwise, so that the lower roller 13 rotates to the left and the upper roller rotates to the right. When the car moves from bottom to top subsequently, the upper roller 13 approaches the right side and the lower roller approaches the left side. Therefore, when the car ascends, the switch blade 2 will not hit the lower roller 13 but continue to rise and hit the upper roller 13, causing the connecting rod assembly 12 to drive the two rollers 13 to rotate counterclockwise, and so on;

[0075] Two static contacts 15 are fixedly arranged in the housing 11. A driving block 16 is fixedly connected to the part of the connecting rod assembly 12 located in the housing 11. Two moving contacts 14 are respectively connected to both ends of the driving block 16; A holding device is also arranged in the housing 11. The holding device is used to limit the rotation of the connecting rod assembly 12 and keep the connecting rod assembly 12 at one of the two preset positions in the steady state. And whenever a roller hits a switch blade 2, the connecting rod assembly 12 switches from the current preset position to the other preset position. When the connecting rod assembly 12 is at one of the preset positions, one group of moving contacts 14 is connected to the static contacts 15 through the movement of the driving block 16. When the connecting rod assembly 12 is at the other preset position, the other group of moving contacts 14 is connected to the static contacts 15 through the movement of the driving block 16.

[0076] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A bistable travel switch device, characterized in that, Comprising: A travel switch (1) and a pair of switch blades (2), the travel switch (1) is installed on the inner wall of the hoistway, and the two switch blades (2) are respectively installed on both sides of one end of the car close to the inner wall of the hoistway where the travel switch (1) is located, and are arranged vertically offset; The travel switch (1) includes a hollow housing (11) and a link assembly (12) provided outside the housing (11) and having one end extending into the housing (11) and rotatably connected to the housing (11). The other end of the link assembly (12) is provided with at least one roller (13). The roller (13) is used for impact cooperation with the two switch blades (2), and at any time, the roller (13) only cooperates with one of the switch blades (2). Two static contacts (15) are fixedly arranged in the housing (11). A driving block (16) is fixedly connected to the part of the link assembly (12) located in the housing (11). Two moving contacts (14) are respectively connected to both ends of the driving block (16). A holding device is also arranged in the housing (11). The holding device is used to limit the rotation of the link assembly (12) and make the link assembly (12) stay at one of the two preset positions in the steady state. And whenever the roller (13) impacts with a switch blade (2), the link assembly (12) switches from the current preset position to the other preset position. When the link assembly (12) is at one of the preset positions, one group of moving contacts (14) is connected to the static contacts (15) through the movement of the driving block (16). When the link assembly (12) is at the other preset position, the other group of moving contacts (14) is connected to the static contacts (15) through the movement of the driving block (16); The holding device includes two first magnetic poles (33), and the two first magnetic poles (33) are respectively arranged at both ends of the driving block (16). An iron cover door (10) is arranged at the opening of the housing (11). The first magnetic poles (33) are used to cooperate with the cover door (10) to limit the movement of the driving block and thus limit the rotation of the link assembly (12). When the link assembly (12) is at one of the preset positions, one of the first magnetic poles (33) is attracted to the cover door (10). When the link assembly (12) is at the other preset position, the other first magnetic pole (33) is attracted to the cover door (10).

2. A bistable travel switch device, characterized in that, Comprising: A travel switch (1) and a pair of switch blades (2), the travel switch (1) is installed on the inner wall of the hoistway, and the two switch blades (2) are respectively installed on both sides of one end of the car close to the inner wall of the hoistway where the travel switch (1) is located, and are arranged vertically offset; The travel switch (1) includes a hollow housing (11) and a link assembly (12) disposed outside the housing (11) with one end extending into the housing (11) and rotatably connected to the housing (11). At the other end of the link assembly (12), at least one roller (13) is provided. The roller (13) is used to cooperate with the two switch blades (2) by impact, and at any moment, the roller (13) only cooperates with one of the switch blades (2). Two static contacts (15) are fixedly arranged in the housing (11). A driving block (16) is fixedly connected to the part of the link assembly (12) located in the housing (11). Two moving contacts (14) are respectively connected to both ends of the driving block (16). A holding device is also arranged in the housing (11). The holding device is used to limit the rotation of the link assembly (12) and make the link assembly (12) stay at one of the two preset positions in the steady state. And whenever the roller (13) impacts one of the switch blades (2), the link assembly (12) switches from the current preset position to the other preset position. When the link assembly (12) is at one of the preset positions, one set of moving contacts (14) is connected to the static contacts (15) through the movement of the driving block (16). When the link assembly (12) is at the other preset position, the other set of moving contacts (14) is connected to the static contacts (15) through the movement of the driving block (16). The holding device includes a second magnetic pole (34) and an iron bracket (35). The second magnetic pole (34) is fixedly connected to the part of the link assembly (12) located in the housing (11) through a connecting block. The iron bracket (35) is fixedly arranged in the housing (11), and both ends of the iron bracket (35) extend towards the middle of the housing (11) and surround both sides of the second magnetic pole (34). When the link assembly (12) is at one of the preset positions, the second magnetic pole (34) is attracted to one side of the iron bracket (35). When the link assembly (12) is at the other preset position, the second magnetic pole (34) is attracted to the other side of the iron bracket (35).

3. The bistable travel switch device according to claim 1 or 2, characterized in that: The link assembly (12) includes a first link (121), a first rotating shaft (122) and a second rotating shaft (123). The first rotating shaft (122) penetrates through the housing (11) and is rotatably connected to the housing (11). One end of the first link (121) is fixedly connected to the part of the first rotating shaft (122) located outside the housing (11). The other end of the first link (121) is fixedly connected to the second rotating shaft (123). The roller (13) is sleeved on the second rotating shaft (123) and is rotatably connected to the second rotating shaft (123).

4. The bistable travel switch device according to claim 1 or 2, characterized in that: The link assembly (12) includes a second link (124), a third rotating shaft (125), a fourth rotating shaft (126), and a fifth rotating shaft (127). The third rotating shaft (125) is inserted through the housing (11) and rotatably connected to the housing (11). One end of the second link (124) is fixedly connected to the part of the first rotating shaft (122) outside the housing (11). The other end of the second link (124) forms a "Y"-shaped fork. The fourth rotating shaft (126) and the fifth rotating shaft (127) are respectively fixedly connected to the two fork ends of the other end of the second link (124). Two rollers (13) are provided and sleeved on the fourth rotating shaft (126) and the fifth rotating shaft (127) respectively and rotatably connected to the fourth rotating shaft (126) and the fifth rotating shaft (127), and the two rollers (13) do not interfere with each other.

5. The bistable travel switch device according to claim 1 or 2, characterized in that: Two reed switches (17) are connected to the driving block (16). One ends of the two reed switches (17) are fixedly connected to the driving block (16), and the other ends are respectively fixedly connected to the two moving contacts (14).

6. A bistable travel switch device, characterized in that, Comprising: A travel switch (1) and a switch blade (2). The travel switch (1) is installed on the inner wall of the hoistway, and the switch blade (2) is installed at one end of the car close to the inner wall of the hoistway where the travel switch (1) is located; The travel switch (1) includes a hollow housing (11) and a link assembly (12) provided outside the housing (11) and extending to the inside of the housing (11) in the middle and rotatably connected to the housing (11). Both ends of the link assembly (12) are provided with rollers (13). The two rollers (13) are used to cooperate with the switch blade (2), and at any moment, the switch blade (2) only cooperates with one of the rollers (13); Two static contacts (15) are fixedly arranged inside the housing (11). A driving block (16) is fixedly connected to the part of the link assembly (12) inside the housing (11). Two moving contacts (14) are respectively connected to both ends of the driving block (16); A holding device is also arranged inside the housing (11). The holding device is used to limit the rotation of the link assembly (12) and keep the link assembly (12) at one of the two preset positions in the steady state. And whenever a roller hits a switch blade, the link assembly switches from the current preset position to the other preset position. When the link assembly (12) is at one of the preset positions, one group of moving contacts (14) is connected to the static contact (15) through the movement of the driving block. When the link assembly (12) is at the other preset position, the other group of moving contacts (14) is connected to the static contact (15) through the movement of the driving block; The holding device includes two first magnetic poles (33) which are respectively arranged at two ends of the driving block (16); a iron cover door (10) is arranged at the opening of the housing (11), and the first magnetic poles (33) are used to cooperate with the cover door (10) to limit the movement of the driving block so as to limit the rotation of the link assembly (12); when the link assembly (12) is at one of the preset positions, one of the first magnetic poles (33) is attracted to the cover door (10), and when the link assembly (12) is at the other preset position, the other first magnetic pole (33) is attracted to the cover door (10).

7. A bistable travel switch device, characterized in that, Comprising: A travel switch (1) and a switch blade (2), the travel switch (1) is installed on the inner wall of the hoistway, and the switch blade (2) is installed at one end of the car close to the inner wall of the hoistway where the travel switch (1) is located; The travel switch (1) includes a hollow housing (11) and a link assembly (12) arranged outside the housing (11) and extending to the inside of the housing (11) in the middle and rotatably connected to the housing (11). Both ends of the link assembly (12) are provided with rollers (13), and the two rollers (13) are used to cooperate with the switch blade (2), and at any time the switch blade (2) only cooperates with one of the rollers (13); two static contacts (15) are fixedly arranged inside the housing (11), a driving block (16) is fixedly connected to the part of the link assembly (12) located inside the housing (11), and two moving contacts (14) are respectively connected to two ends of the driving block (16); a holding device is also arranged inside the housing (11), and the holding device is used to limit the rotation of the link assembly (12) and make the link assembly (12) stay at one of the two preset positions in a steady state. And whenever a roller impacts a switch blade, the link assembly switches from the current preset position to the other preset position. When the link assembly (12) is at one of the preset positions, one group of moving contacts (14) is connected to the static contacts (15) through the movement of the driving block, and when the link assembly (12) is at the other preset position, the other group of moving contacts (14) is connected to the static contacts (15) through the movement of the driving block; The holding device includes a second magnetic pole (34) and an iron bracket (35), the second magnetic pole (34) is fixedly connected to the part of the link assembly (12) located inside the housing (11) through a connecting block; the iron bracket (35) is fixedly arranged inside the housing (11), and both ends of the iron bracket (35) extend towards the middle of the housing (11) and surround both sides of the second magnetic pole (34). When the link assembly (12) is at one of the preset positions, the second magnetic pole (34) is attracted to one side of the iron bracket (35), and when the link assembly (12) is at the other preset position, the second magnetic pole (34) is attracted to the other side of the iron bracket (35).

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