Elevator floor door lock device and protective cover

Abstract

The present invention relates to an elevator floor door lock device and a protective cover, wherein the protective cover comprises a cover body. The cover body is provided with an inlet and outlet for loading a lock hook and a contact terminal. The cover body comprises two first side panels arranged opposite to each other, and two first connecting plates arranged opposite to each other. The two ends of the first connecting plates are respectively connected to the two first side panels, and the two first side panels and the two first connecting plates enclose the inlet and outlet. In the above-mentioned protective cover, during the process of inserting a finger or a solid foreign object into the cover body through the inlet and outlet, since the two first side panels are connected by the two first connecting plates arranged opposite to each other and enclose the inlet and outlet, the inlet and outlet will not be expanded by the finger or the solid foreign object, and the protection level is relatively high and can meet the IP2X requirement.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to an elevator landing door locking device and protective cover. Background Technology

[0002] As public awareness of elevator safety increases, elevator industry standards have been upgraded. Among the new standards, protective enclosures (covers) must be used in the hoistway, machine space, and pulley compartment to prevent direct contact with electrical equipment. The protection rating of these enclosures (covers) must be no less than IP2X. The standard also stipulates that the components of the electrical safety device verifying the door's locking status must be forcibly operated by the locking mechanism without any intermediate mechanisms. The locking of the landing door lock is verified by an electrical safety device that conforms to national standards; that is, the electrical safety device on the landing door lock must meet the IP2X protection rating requirement. However, when using asynchronous door knife technology, the locking hook needs to rotate and then translate during the closing process. Due to the complex movement trajectory, plug-in switches cannot be used. Traditional protective covers easily allow fingers or solid foreign objects to enter through the hook's inlet and outlet, resulting in a lower protection rating and making it difficult to meet the IP2X requirement. Summary of the Invention

[0003] Therefore, it is necessary to overcome the shortcomings of the existing technology and provide an elevator landing door locking device and protective cover that can improve the protection level to meet IP2X requirements.

[0004] The technical solution is as follows: A protective cover includes: a cover body, the cover body having an inlet and outlet for inserting a locking hook and a contact terminal, the cover body including two first side plates arranged opposite to each other and two first connecting plates arranged opposite to each other, the two ends of the first connecting plates being connected to the two first side plates respectively, and the two first side plates and the two first connecting plates forming the inlet and outlet.

[0005] The aforementioned protective cover, when fingers or solid foreign objects are inserted into the cover through the inlet and outlet, will not be widened by fingers or solid foreign objects because the two first side plates are connected by two oppositely arranged first connecting plates and form the inlet and outlet. The protection level is high and can meet the IP2X requirements.

[0006] In one embodiment, the two first side plates and the two first connecting plates are an integrated structure.

[0007] In one embodiment, the cover further includes a main body, the main body having a first opening, two first side plates and two first connecting plates disposed in the first opening, and the first side plates and the first connecting plates are all integrally formed with the main body.

[0008] In one embodiment, the main body includes a shell and a second side plate. The side of the shell is provided with a second opening. The second side plate is correspondingly provided with the second opening. The main body, the two first side plates and the two first connecting plates are an integrated structure. The shell, the two first side plates and the two first connecting plates are transparent plates.

[0009] In one embodiment, both the housing and the second side plate are detachably connected to a bracket disposed inside the housing.

[0010] In one embodiment, the cover further includes a main body and a bottom plate. The main body has a first opening on its side, two first side plates and two first connecting plates are disposed in the first opening, the bottom surface of the main body has a third opening, the bottom plate is disposed corresponding to the third opening, the bottom plate is connected to the first connecting plate, the main body is used to be detachably connected to a bracket disposed inside the cover, and the bottom plate is used to be detachably connected to an insulating seat inside the cover.

[0011] In one embodiment, the main body is transparent, and the bottom plate, the two first side plates, and the two first connecting plates are all metal plates.

[0012] In one embodiment, the distance between the two first side plates is no more than 12 mm; the distance between the switch body inside the cover and the inlet / outlet is greater than 20 mm; and a marking line is provided on the top of the cover at the location corresponding to the inlet / outlet.

[0013] An elevator landing door lock device includes the aforementioned protective cover, and further includes a lock hook, a contact terminal, an insulating base disposed within the protective cover, two switch bodies mounted vertically and spaced apart on the insulating base, a lock seat disposed at the bottom of the protective cover, a mounting base, and a retaining device. The mounting base is used to mount on a door hanging plate. The mounting base is connected to the lock hook via the retaining device. The lock hook is also rotatably connected to the mounting base via a rotating shaft. The hook body of the lock hook cooperates with the hook body of the lock seat. The contact terminal is mounted on the lock hook and is used for electrical contact with the two switch bodies. When the hook body of the lock hook and the hook body of the lock seat hook each other, the conductive surface of the contact terminal simultaneously makes electrical contact with the two switch bodies. When the hook body of the lock hook separates from the hook body of the lock seat, the conductive surface of the contact terminal separates from the switch body.

[0014] The aforementioned elevator landing door lock device, since it includes the protective cover, derives its technical effect from the protective cover, and its beneficial effects are the same as those of the protective cover, so they will not be elaborated here.

[0015] In one embodiment, the mounting base is provided with a first support plate, and the locking hook is provided with a second support plate opposite to the first support plate. The first support plate is provided with a first through hole, which is a screw hole, and the second support plate is provided with a second through hole opposite to the first through hole. The retaining device includes a limiting bolt, and the limiting bolt is provided with an anti-loosening nut. The limiting bolt is axially movable in the first through hole and the second through hole, and the first support plate and the second support plate are both located between the head of the limiting bolt and the anti-loosening nut. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the protective cover according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 An exploded view of the protective cover;

[0018] Figure 3 This is a schematic diagram of the structure of the protective cover according to another embodiment of the present invention;

[0019] Figure 4 for Figure 3 An exploded view of the protective cover;

[0020] Figure 5 This is a schematic diagram of the structure after the insulating base and switch body are installed inside the protective cover according to an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of an elevator landing door lock device according to an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure in which the locking hook, mounting base, and retaining device are connected together according to an embodiment of the present invention;

[0023] Figure 8 This is a side view of the holding device according to an embodiment of the present invention;

[0024] Figure 9 This is a side view of the retaining device according to an embodiment of the present invention, with the elastic element removed and a pulley installed.

[0025] Figure 10 This is a structural view of the first limiting cover according to an embodiment of the present invention;

[0026] Figure 11 This is another structural view of the first limiting cover according to an embodiment of the present invention;

[0027] Figure 12 This is a schematic diagram of the structure of the protective cover after the insulating base, switch body and bracket are installed inside according to an embodiment of the present invention;

[0028] Figure 13 for Figure 12 A schematic diagram of the structure of the protective cover described in the document;

[0029] Figure 14 for Figure 13 The diagram shows the exploded structure of the protective shield.

[0030] Figure 15 for Figure 12 A structural diagram of the support described herein from one perspective;

[0031] Figure 16 for Figure 12 Another structural view of the stent described in the document;

[0032] Figure 17 This is a schematic diagram of the structure after the insulating base, switch body and bracket are installed inside the protective cover according to another embodiment of the present invention;

[0033] Figure 18 for Figure 17 The diagram shows the structure of the protective cover described in the document.

[0034] Figure label:

[0035] 10. Protective cover; 11. Inlet / outlet; 12. First side plate; 13. First connecting plate; 14. Main body; 141. First opening; 142. Shell; 1421. Second opening; 1422. First mounting hole; 1423. First through hole; 143. Second side plate; 1431. Second mounting hole; 1432. Cable inlet / outlet; 1433. Second through hole; 144. Third opening; 145. Third mounting hole; 146. Third through hole; 15. Base plate; 151. Fourth mounting hole; 20. Locking hook; 21. Hook body; 22. Pulley; 23. Second support plate. 24. L-shaped plate; 30. Contact terminal; 31. Working surface; 40. Insulating base; 50. Switch body; 60. Lock seat; 61. Hook body; 70. Mounting base; 71. First support plate; 80. Holding device; 81. Limit bolt; 82. Anti-loosening nut; 83. Elastic element; 84. First limit cover; 841. Annular flange; 85. Second limit cover; 90. Rotating shaft; 100. Bracket; 101. Fifth mounting hole; 102. Sixth mounting hole; 103. Seventh mounting hole; 110. First mounting component; 120. Third mounting component; 130. Fifth mounting component. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In the description of this invention, it should be understood that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be intermediate elements present. Conversely, when an element is referred to as being "directly" connected to another element, there are no intermediate elements.

[0039] In one embodiment, see Figures 1 to 5 A protective cover 10 includes a cover body. The cover body has an inlet and outlet 11 for accommodating a locking hook 20 and a contact terminal 30. The cover body includes two first side plates 12 disposed opposite to each other and two first connecting plates 13 disposed opposite to each other. The two ends of the first connecting plates 13 are respectively connected to the two first side plates 12, and the two first side plates 12 and the two first connecting plates 13 form the inlet and outlet 11.

[0040] The aforementioned protective cover 10, when a finger or solid foreign object is inserted into the cover body through the inlet and outlet 11, will not be expanded by the finger or solid foreign object because the two first side plates 12 are connected by two oppositely arranged first connecting plates 13 and form the inlet and outlet 11. The protection level is high and can meet the IP2X requirements.

[0041] Furthermore, the two first side plates 12 and the two first connecting plates 13 are an integrated structure. Optionally, the two first side plates 12 and the two first connecting plates 13 are connected by welding, screw connection, snap-fit ​​connection, or other methods. In this way, the side wall structure forming the inlet / outlet 11 is stable and not easily spread by fingers or solid foreign objects, thus providing a high level of protection.

[0042] In one embodiment, see Figure 1 and Figure 2The cover also includes a main body 14. The main body 14 has a first opening 141, and two first side plates 12 and two first connecting plates 13 are disposed in the first opening 141. The first side plates 12 and the first connecting plates 13 are all integrated with the main body 14 to form an integral structure.

[0043] Furthermore, the main body 14 includes a shell 142 and a second side plate 143. The shell 142 has a second opening 1421 on its side, and the second side plate 143 is correspondingly arranged with the second opening 1421. The shell 142, the two first side plates 12, and the two first connecting plates 13 are an integrated structure, and the main body 14, the two first side plates 12, and the two first connecting plates 13 are transparent plates. Specifically, the shell 142, the two first side plates 12, and the two first connecting plates 13 are transparent acrylic plates, manufactured using injection molding. Thus, the working state inside the protective cover 10 can be observed through the transparent protective cover 10.

[0044] Furthermore, the first side plate 12 located at the second opening 1421 is provided with a stepped position for placing the second side plate 143. After the second side plate 143 is placed in this stepped position, it is connected to the bracket 100 inside the enclosure via the first mounting member 110, resulting in good installation stability and high overall structural strength. In addition, the second side plate 143 is provided with a cable inlet / outlet port 1432. The diameter of the cable inlet / outlet port 1432 is no greater than 5mm, providing a high protection level that meets IP2X requirements.

[0045] Furthermore, both the housing 142 and the second side plate 143 are detachably connected to the bracket 100 disposed inside the enclosure. Specifically, the housing 142 is provided with a first mounting hole 1422, and the housing 142 is connected to the bracket 100 after passing through the first mounting hole 1422. Similarly, the second side plate 143 is provided with a second mounting hole 1431, and the second side plate 143 is connected to the bracket 100 after passing through the second mounting hole 1431. In this way, the housing 142 and the second side plate 143 can be disassembled to replace or repair the insulating base 40 and the switch body 50 inside the enclosure.

[0046] In another embodiment, please refer to Figure 3 and Figure 4The enclosure also includes a main body 14 and a base plate 15. The main body 14 has a first opening 141 on its side, with two first side plates 12 and two first connecting plates 13 disposed within the first opening 141. The bottom surface of the main body 14 has a third opening 144, with the base plate 15 correspondingly disposed to the third opening 144. The base plate 15 is connected to the first connecting plates 13. The main body 14 is detachably connected to a support 100 disposed inside the enclosure. The base plate 15 is detachably connected to an insulating base 40 inside the enclosure.

[0047] Specifically, the main body 14 is provided with a third mounting hole 145, and the main body 14 is connected to the bracket 100 after passing through the third mounting hole 145 with a third mounting component 120. Similarly, the base plate 15 is provided with a fourth mounting hole 151, and the base plate 15 is connected to the insulating seat 40 after passing through the fourth mounting hole 151 with a fourth mounting component. In this way, the main body 14 can be disassembled to replace or repair the insulating seat 40 and the switch body 50 inside the enclosure.

[0048] Furthermore, the main body 14 is transparent, and the base plate 15, the two first side plates 12, and the two first connecting plates 13 are all metal plates. Thus, the working state inside the protective cover can be observed through the transparent protective cover 10. In addition, the metal plates ensure the structural strength of the inlet and outlet 11 of the protective cover 10; specifically, stainless steel plates are selected for the metal plates.

[0049] In one embodiment, the distance between the two first side plates 12 is no greater than 12mm; the distance between the switch body 50 inside the cover and the inlet / outlet 11 is greater than 20mm. This improves the protection level of the protective cover 10 and provides higher safety.

[0050] In addition, a marking line is provided on the top of the cover corresponding to the inlet / outlet 11. The marking line can be a scale line with the same width as the contact terminal 30. During installation and adjustment, align the marking line with the contact terminal 30 when viewed from above to ensure that the contact terminal 30 is centered and enters the cover.

[0051] In one embodiment, see Figures 6 to 8An elevator landing door lock device includes a protective cover 10 as described in any of the above embodiments, and further includes a lock hook 20, a contact terminal 30, an insulating base 40 disposed within the protective cover 10, two switch bodies 50 mounted vertically at intervals on the insulating base 40, a lock seat 60 disposed at the bottom of the protective cover 10, a mounting base 70, and a retaining device 80. The mounting base 70 is used to mount on a door hanger plate, and the mounting base 70 is connected to the lock hook 20 via the retaining device 80. The lock hook 20 is also rotatably connected to the mounting base 70 via a rotating shaft 90, and the hook body 21 of the lock hook 20 cooperates with the hook body 61 of the lock seat 60. The contact terminal 30 is mounted on the lock hook 20, and the contact terminal 30 is used for electrical contact with the two switch bodies 50. When the hook body 21 of the lock hook 20 and the hook body 61 of the lock seat 60 are hooked together, the conductive surface of the contact terminal 30 is simultaneously in electrical contact with the two switch bodies 50; when the hook body 21 of the lock hook 20 and the hook body 61 of the lock seat 60 are separated, the conductive surface of the contact terminal 30 is separated from the switch body 50.

[0052] The aforementioned elevator landing door lock device, including the protective cover 10, derives its technical effect from the protective cover 10, and its beneficial effects are the same as those of the protective cover 10, which will not be elaborated here. Furthermore, when the hook body 21 of the lock hook 20 and the hook body 61 of the lock seat 60 are engaged, the conductive surface of the contact terminal 30 simultaneously makes electrical contact with the two switch bodies 50, and the two switch bodies 50 are electrically connected. At this time, the electrical switch continuity confirms that the lock hook 20 and the lock seat 60 are in an engaged state, exhibiting good stability and ensuring the safety of the landing door. When the hook body 21 of the lock hook 20 separates from the hook body 61 of the lock seat 60, the conductive surface of the contact terminal 30 separates from the switch body 50, and the two switch bodies 50 are disconnected, and the electrical switch is not connected.

[0053] Specifically, the structure formed by the lock seat 60 and the protective cover 10 can effectively prevent fingers or solid foreign objects from entering and contacting the insulating seat 40 and the switch body 50 covered inside the protective cover 10, thus providing a high level of protection.

[0054] In one embodiment, see Figures 6 to 8The mounting base 70 is provided with a first support plate 71, and the locking hook 20 is provided with a second support plate 23 opposite to the first support plate 71. The first support plate 71 has a first through hole, which is a screw hole, and the second support plate 23 has a second through hole opposite to the first through hole. The retaining device 80 includes a limiting bolt 81. The limiting bolt 81 is provided with a lock nut 82. The limiting bolt 81 is axially movable in the first through hole and the second through hole, and the first support plate 71 and the second support plate 23 are both located between the head of the limiting bolt 81 and the lock nut 82. Thus, by adjusting the position of the lock nut 82 on the limiting bolt 81, the tilting state of the locking hook 20 is adjusted, so that the locking hook 20 is in a horizontal state (i.e., a horizontal state).

[0055] Further, please refer to Figures 6 to 8 The retaining device 80 further includes an elastic element 83 disposed between the first support plate 71 and the second support plate 23. When the locking hook 20 is in a horizontal state, the elastic element 83 is in a compressed state, providing a locking force to the locking hook 20 to keep it in a horizontal state. Specifically, the elastic element 83 is a compression spring sleeved on the limiting bolt 81.

[0056] Furthermore, the retaining device 80 is specifically arranged between the rotating shaft 90 and the contact terminal 30. A pulley 22 is rotatably mounted on the lock hook 20, and the pulley 22 is arranged between the rotating shaft 90 and the contact terminal 30. Thus, when the door knife acts on the pulley 22, it can drive the lock hook 20 to rotate relative to the mounting base 70, thereby causing the lock hook 20 to lift up and separate from the lock seat 60. At this time, the elastic member 83 is further compressed. When the force of the door knife is removed, the lock hook 20 returns to its original horizontal state under the restoring force of the elastic member 83 and the gravity of the lock hook 20.

[0057] Further, please refer to Figures 6 to 8 The retaining device 80 further includes a first limiting cover 84 and a second limiting cover 85. The limiting bolt 81 passes through the first limiting cover 84 and the second limiting cover 85, which are positioned opposite each other. One end of the elastic element 83 is fitted inside the first limiting cover 84, and the other end is fitted inside the second limiting cover 85. Thus, since both ends of the elastic element 83 are located inside the first limiting cover 84 and the second limiting cover 85 respectively, the first limiting cover 84 and the second limiting cover 85 ensure that the spring remains in a vertical position during the rotation of the locking hook 20.

[0058] Further, please refer to Figures 9 to 11The second limiting cover 85 abuts against the first support plate 71, and the first limiting cover 84 abuts against the second support plate 23. The first limiting cover 84 is provided with a first annular flange 841, which extends into the second through hole, thereby fixing the first limiting cover 84 to the second support plate 23.

[0059] Furthermore, the locking hook 20 is connected to an L-shaped plate 24, on which a pulley 22 is rotatably mounted via a pivot. Additionally, the surface of the contact terminal 30 is in contact with the surface of the locking hook 20, and they are detachably connected using fasteners such as bolts.

[0060] Further, please refer to Figures 6 to 8 Two switch bodies 50 are disposed vertically on the insulating base 40. The surface of the contact terminal 30 that contacts the two switch bodies 50 is the working surface 31, which is a conductive surface and is stepped. The contact method between the contact terminal 30 and the switch bodies 50 is surface-to-surface contact, which facilitates the conduction of the two switch bodies 50. The portion of the contact terminal 30 other than the working surface 31 is an insulator, thereby improving the protection level of the protective cover 10 and providing higher safety.

[0061] Further, please refer to Figure 12 or Figure 17 The elevator landing door lock device further includes a bracket 100 disposed within the enclosure. The bracket 100 is detachably mounted on the lock base 60.

[0062] Further, please refer to Figures 12 to 16 In one of the above embodiments, the protective cover 10 is connected to the bracket 100 via a first mounting member 110 passing through a first mounting hole 1422. Similarly, the second side plate 143 is connected to the bracket 100 via a second mounting member passing through a second mounting hole 1431.

[0063] Specifically, the first mounting component 110 is a first screw or a first bolt. The housing 142 also has a first through hole 1423 communicating with the first mounting hole 1422. The limiting head of the first mounting component 110 can pass through the first through hole 1423 to loosen the housing 142. In actual operation, when it is necessary to disassemble the housing 142, first loosen the first mounting component 110, then move the housing 142 so that the first through hole 1423 moves to a position opposite to the first mounting component 110. This allows the housing 142 to be removed without detaching the first mounting component 110 from the bracket 100, improving the protection level and safety.

[0064] Furthermore, the second mounting component is a second screw or a second bolt. The second side plate 143 also has a second through hole 1433 communicating with the second mounting hole 1431. The limiting head of the second mounting component can pass through this second through hole 1433 to loosen the second side plate 143. In actual operation, when it is necessary to remove the second side plate 143, first loosen the second mounting component, then move the second side plate 143 so that the second through hole 1433 moves to a position opposite to the second mounting component. This allows the second side plate 143 to be removed without detaching the second mounting component from the bracket 100, improving the protection level and ensuring higher safety.

[0065] Furthermore, the bracket 100 is specifically a U-shaped bracket. One side of the U-shaped bracket is provided with a fifth mounting hole 101 corresponding to the first mounting member 110, and the other side is provided with a sixth mounting hole 102 corresponding to the second mounting member. The bottom is provided with a seventh mounting hole 103. The bottom of the bracket 100 is detachably mounted on the lock seat 60 through the fifth mounting member 130 passing through the seventh mounting hole 103.

[0066] Further, please refer to Figure 17 and Figure 18 In another embodiment of the above, the protective cover 10 is connected to the bracket 100 by the third mounting member 120 passing through the third mounting hole 145.

[0067] Specifically, the third mounting component 120 is a third screw or a third bolt. The main body 14 also has a third through hole 146 communicating with the third mounting hole 145. The limiting head of the third mounting component 120 can pass through the third through hole 146 to loosen the main body 14. In actual operation, when it is necessary to disassemble the main body 14, first loosen the third mounting component 120, then move the main body 14 so that the third through hole 146 moves to a position opposite to the third mounting component 120. This allows the main body 14 to be removed without detaching the third mounting component 120 from the bracket 100, improving the protection level and ensuring higher safety.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A protective cover, characterized in that: include: A cover body, wherein the cover body is provided with an inlet and outlet for loading the lock hook and the contact terminal, the cover body includes two first side plates arranged opposite to each other, and two first connecting plates arranged opposite to each other, the two ends of the first connecting plate are respectively connected to the two first side plates, and the two first side plates and the two first connecting plates surround the inlet and outlet; the cover body also includes a main body and a bottom plate, the main body is a transparent main body, the side surface of the main body is provided with a first opening, the two first side plates and the two first connecting plates are arranged at the first opening, the bottom surface of the main body is provided with a third opening, the bottom plate is arranged corresponding to the third opening, the bottom plate is connected to the first connecting plate, the main body is used to be detachably connected to the bracket arranged inside the cover body; the bottom plate is used to be detachably connected to the insulating seat inside the cover body; the bottom plate, the two first side plates and the two first connecting plates are all metal plates and are set as an integrated structure, and the bottom plate, the two first side plates and the two first connecting plates are all separate structures independently set from the main body.

2. The protective cover according to claim 1, characterized in that: The distance between the two first side plates is no more than 12 mm; the distance between the switch body in the cover body and the inlet and outlet is greater than 20 mm.

3. The protective cover according to claim 1, characterized in that: The main body is provided with a third mounting hole, and the main body is connected to the bracket after a third mounting piece passes through the third mounting hole.

4. The protective cover according to claim 3, characterized in that: The third mounting member is a third screw or a third bolt; the main body is also provided with a third through hole connected to the third mounting hole, and the limiting head of the third mounting member can pass through the third through hole to loosen the main body.

5. The protective cover according to claim 1, characterized in that: The bottom plate is provided with a fourth mounting hole, and the bottom plate is connected to the insulating seat after a fourth mounting piece passes through the fourth mounting hole.

6. The protective cover according to claim 1, characterized in that: The metal plate is a stainless steel plate.

7. The protective cover according to any one of claims 1 to 6, characterized in that: A marking line is arranged at a position on the top of the cover body corresponding to the inlet and outlet.

8. The protective cover according to claim 7, characterized in that: The marking line adopts a scale line having the same width as the contact terminal.

9. An elevator door lock device, characterized in that: It includes the protective cover as described in any one of claims 1 to 8, and also includes a lock hook, a contact terminal, a mounting base, a retaining device, an insulating seat arranged in the protective cover, two switch bodies installed on the insulating seat with an upper and lower interval, and a lock seat arranged at the bottom of the protective cover, the mounting base is used to be installed on the door hanging plate, the mounting base is connected to the lock hook through the retaining device, the lock hook is also rotatably connected to the mounting base through a rotating shaft, the hook body of the lock hook cooperates with the hook body of the lock seat, the contact terminal is installed on the lock hook, and the contact terminal is used to electrically contact with the two switch bodies; when the hook body of the lock hook and the hook body of the lock seat are hooked with each other, the conductive surface of the contact terminal is synchronously electrically contacted with the two switch bodies; when the hook body of the lock hook is separated from the hook body of the lock seat, the conductive surface of the contact terminal is separated from the switch body.

10. The elevator floor door locking device according to claim 9, characterized in that: The mounting base is provided with a first support plate, the locking hook is provided with a second support plate opposite to the first support plate, the first support plate is provided with a first through hole, the first through hole is a screw hole, and the second support plate is provided with a second through hole opposite to the first through hole; the retaining device includes a limiting bolt, the limiting bolt is provided with a locking nut, the limiting bolt is movably arranged in the first through hole and the second through hole in the axial direction, and the first support plate and the second support plate are both located between the head of the limiting bolt and the locking nut.

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