PD door closing switch and PD door

Abstract

The utility model belongs to the technical field of door and window accessories, and provides a PD door closing switch and a PD door, the closing switch comprises a first seat body and a second seat body which are matched with each other, the first seat body is provided with a first slide way, the second seat body is provided with a second slide way corresponding to the first slide way, the closing switch further comprises an anti-retreating mechanism, the anti-retreating mechanism comprises an anti-retreating piece and a locking arm, and the locking arm is connected with the anti-retreating piece. The anti-retreating piece is matched with the locking arm to limit the separation of the first seat body and the second seat body; the anti-retreating part is arranged on the first seat body and convexly arranged on one side, close to the second seat body, of the first seat body, the locking arm is hinged to the second seat body, and a first resetting part is arranged between the locking arm and the second seat body; or the anti-retreating piece is arranged on the second seat body, the anti-retreating piece is arranged on the side, close to the first seat body, of the second seat body in a protruding mode, the locking arm is hinged to the first seat body, and a first reset piece is arranged between the locking arm and the second seat body. The PD door comprises a door and window body and the PD door closing switch. The switch and the PD door have the advantages of being simple and compact in structure, high in reliability and good in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window accessories, in particular to a PD door closing switch. Background Art

[0002] PD doors, also known as sliding casement doors, are doors and windows that can be pushed and pulled to partially open, or pivoted and fully opened. They are ideal for use in areas with floor-to-ceiling doors, such as balconies, study rooms, and gardens, especially those with smaller outdoor spaces. The use of sliding casement doors expands home window and door options, enhancing the overall decor's clarity, brightness, and modernity.

[0003] The sliding track of sliding doors and windows consists of two parts: a fixed track fixed to the upper part of the door and window frame, and a moving track fixed to the top of the fixed door and window frame. When the sliding doors and windows need to be fully opened, they need to slide onto the moving track with the help of the fixed track, overlap with the fixed doors and windows, and then rotate outward to open. Therefore, the sliding and swinging of PD doors requires the fixed track and the moving track to switch between engagement and separation. To improve safety, a closing switch is usually set between the fixed track and the moving track. The main function of the closing switch is to connect the moving track and the fixed track when the doors and windows are in the sliding state to prevent the moving track and the fixed track from suddenly separating during the sliding process, causing safety hazards. When the doors and windows are in the swing state, as long as an external force of the appropriate direction and size is applied, the doors and windows can be rotated and opened. In addition, the engagement or separation of the moving track and the fixed track is mainly achieved by the anti-detachment component of the closing switch.

[0004] For example, Chinese utility model patent No. CN214659562U discloses a high-low stable coupling closure device, comprising a fixed portion and a sliding portion for use in conjunction with each other, wherein the coupling and separation of the two mainly rely on an anti-slipping protrusion and an anti-slipping interlocking concave surface. The anti-slipping protrusion is retractable. When the fixed portion and the sliding portion are coupled, the anti-slipping protrusion snaps into the anti-slipping interlocking concave surface, thereby preventing the device from slipping off. When the anti-slipping protrusion is separated, an external force can be applied to cause the anti-slipping protrusion to retract and separate from the anti-slipping interlocking concave surface. However, in the above-mentioned anti-slipping assembly, since the fixed portion and the sliding portion are coupled laterally in a horizontal direction, while the anti-slipping protrusion is retracted perpendicular to the coupling surface, the force direction of the anti-slipping protrusion is different from the direction of extension. When the assembly clearance of the anti-slipping protrusion is too large or the force is too great, the anti-slipping protrusion is easily stuck and cannot be smoothly extended and retracted, posing a certain safety hazard.

[0005] The technical problem to be solved by the present invention is: how to solve the problem that the existing PD door closing switch has poor reliability and potential safety hazards. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a PD door closing switch and a PD door, which have the characteristics of simple and compact structure, high reliability and good safety.

[0007] The technical solution adopted by the utility model is as follows: a PD door closing switch, comprising a first base body and a second base body that cooperate with each other, the first base body being provided with a first slideway, the second base body being provided with a second slideway corresponding to the first slideway, and further comprising an anti-recoil mechanism, the anti-recoil mechanism comprising an anti-recoil member and a locking arm, the anti-recoil member and the locking arm cooperating to prevent the first base body from separating from the second base body;

[0008] The anti-retraction member is provided on the first base body, and the anti-retraction member is protruded on a side of the first base body close to the second base body, the locking arm is hinged to the second base body, and a first reset member is provided between the locking arm and the second base body; or

[0009] The anti-retraction member is arranged on the second base body, and the anti-retraction member is protruded on one side of the second base body close to the first base body. The locking arm is hinged to the first base body, and a first reset member is arranged between the locking arm and the second base body.

[0010] The PD door closing switch of the present application can prevent the first base body and the second base body from being easily separated when the two are combined through the cooperation of the anti-recoil part and the locking arm. When the first base body and the second base body are separated, it is only necessary to apply an external force that exceeds the combining force of the anti-recoil part and the locking arm. The operation is convenient and safe. The positions of the anti-recoil part and the locking arm can be set relative to each other on the first base body and the second base body respectively as needed; since the locking arm and the base body are hinged, when the anti-recoil part applies external force to the locking arm from the side of the locking arm, the locking arm is extended and retracted by rotating and swinging. The rotating connected locking arm can effectively avoid getting stuck, which can improve the reliability of the PD door closing switch structure.

[0011] In some embodiments, a slot corresponding to the anti-retraction member is provided on the locking arm.

[0012] By adopting the above technical solution, the card slot can provide positioning for the anti-return component, so as to improve the combination accuracy between the locking arm and the anti-return component.

[0013] In some embodiments, there are two locking arms, which are arranged opposite to each other to form a snap ring with an opening corresponding to the anti-retraction member.

[0014] By adopting the above technical solution, by setting two oppositely arranged locking arms, the anti-retraction part can be embraced from opposite sides of the anti-retraction part, thereby increasing the contact area between the locking arms and the anti-retraction part and improving the reliability of the closed switch structure.

[0015] In some embodiments, lead-in angles are provided on opposite sides of the anti-retraction member.

[0016] By adopting the above technical solution, setting the guide angle can play a guiding role when the anti-retraction member enters and exits the clamping ring structure, thereby facilitating the combination and separation of the anti-retraction member and the locking arm.

[0017] In some embodiments, a mounting groove for accommodating the locking arm is provided on the first base or the second base, and a first limiting block and a second limiting block for limiting the swing amplitude of the locking arm are provided in the mounting groove.

[0018] By adopting the above technical solution, the first limit block and the second limit block can limit the opening and closing range of the locking arm, ensuring that the locking arm can move within the effective stroke, thereby improving reliability.

[0019] In some embodiments, the anti-retreat member includes a base and an anti-retreat pin connected to the base. The base is detachably connected to the first base body or the second base body through a fastener. An elongated hole corresponding to the fastener is provided on the base, and the length of the elongated hole extends in the horizontal direction.

[0020] By adopting the above technical solution, by opening a long hole, the horizontal position of the anti-retreat pin can be fine-tuned. When the first seat body and the second seat body are installed on the door with deviation, the anti-retreat pin and the lock arm can be docked by adjusting the position of the anti-retreat pin.

[0021] In some embodiments, the anti-recoil component also includes an adjusting rod, the adjusting rod includes a connecting part and an adjusting part, the connecting part is connected to the first seat body or the second seat body, the adjusting part and the connecting part are eccentrically arranged, the adjusting part is connected to the base and / or the anti-recoil pin, a first tooth is provided at the bottom of the base, and a second tooth corresponding to the first tooth is provided on the first seat body or the second seat body.

[0022] By adopting the above technical solution, by setting an adjustment rod with an eccentric structure, the position of the anti-recoil pin can be adjusted by rotating the adjustment rod, and through the cooperation of the first latch tooth and the second latch tooth, the friction between the base and the first seat body or the second seat body can be increased, preventing the position of the anti-recoil pin from changing after long-term use.

[0023] In some embodiments, a blocking mechanism is further included, the blocking mechanism including a baffle and a second reset member, the baffle being mounted on the first base, and the second reset member connecting the baffle and the first base;

[0024] When the first seat body is separated from the second seat body, the baffle extends into the first slideway;

[0025] When the first base body and the second base body are docked into place, the baffle is received in the first base body.

[0026] By adopting the above technical solution, by setting a baffle, when the first seat body and the second seat body are docked, the baffle can be retracted into the first seat body to prevent the baffle from hindering the sliding of the sliding fan. When the first seat body and the second seat body are separated, the baffle extends into the first slide channel to block the sliding fan and prevent the sliding fan from sliding out when rotating to open, causing a safety hazard.

[0027] In some embodiments, an anti-falling mechanism is further included, the anti-falling mechanism including an anti-falling block and an anti-falling groove cooperating with the anti-falling block;

[0028] The anti-fall block is arranged on a side of the first base body close to the second base body, and the anti-fall groove is opened on a side of the second base body close to the first base body; or

[0029] The anti-falling block is arranged on a side of the second base body close to the first base body, and the anti-falling groove is opened on a side of the first base body close to the second base body.

[0030] By adopting the above technical solution, the anti-fall block and the anti-fall groove can be coordinated to ensure that the first seat body and the second seat body are on the same horizontal plane after docking, thereby preventing the movable rail from falling and causing a gap between the first slide and the second slide, thereby affecting the normal sliding of the sliding fan.

[0031] A PD door includes a door window body and the above-mentioned PD door closing switch. The door window body includes a frame, a fixed rail, a movable rail, a casement sash and a sliding sash. The fixed rail is fixed on the frame, the movable rail is hinged to the frame, the casement sash is installed on the movable rail, and the sliding sash is slidably connected to the fixed rail and the movable rail. The first seat body is installed on the movable rail near the fixed rail, and the second seat body is installed on the fixed rail near the movable rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural schematic diagram of a PD door closing switch in a separated state in a preferred embodiment of the present invention;

[0033] Figure 2 for Figure 1 The schematic diagram of the structure of the PD door closing switch in another perspective is shown in the separated state;

[0034] Figure 3 for Figure 2 The schematic structural diagram of the first seat body is shown, wherein the first cover plate is not shown;

[0035] Figure 4 for Figure 1 The structural diagram of the anti-retraction member shown;

[0036] Figure 5 for Figure 1 A schematic structural diagram of the second base body is shown, wherein the second cover plate is not shown;

[0037] Figure 6 for Figure 1 The schematic diagram of the structure of the PD gate closing switch in the engaged state is shown;

[0038] Figure 7 for Figure 6 The structure diagram of the anti-retraction mechanism of the PD door closing switch is shown in the engaged state.

[0039] In the figure: 100, PD door closing switch; 10, first base; 11, first slide; 20, second base; 21, second slide; 30, anti-retreat mechanism; 31, anti-retreat member; 311, introduction angle; 312, base; 313, anti-retreat pin; 314, elongated hole; 315, adjusting rod; 316, first tooth; 32, locking arm; 321, slot; 33, first reset member; 34, mounting slot; 35, first limit block; 36, second limit block; 40, blocking mechanism; 41, baffle; 42, second reset member; 43, trigger member; 44, extension rod; 50, anti-fall mechanism; 51, first anti-fall block; 52, first anti-fall groove; 53, second anti-fall block; 54, second anti-fall groove. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 making creative efforts are within the scope of protection of the present invention.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may also be an element centered thereon. When the number of an element is referred to as having "plurality", it may be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] See also Figures 1 to 7, which is a PD door closing switch 100 of a preferred embodiment of the present invention, includes a first base body 10 and a second base body 20 that cooperate with each other, the first base body 10 is provided with a first slide 11, and the second base body 20 is provided with a second slide 21 corresponding to the first slide 11, and also includes an anti-retreat mechanism 30, the anti-retreat mechanism 30 includes an anti-retreat member 31 and a locking arm 32, the anti-retreat member 31 and the locking arm 32 cooperate to limit the separation of the first base body 10 and the second base body 20.

[0044] like Figure 1 and Figure 2 As shown, in this embodiment, the anti-retraction member 31 is provided on the first base body 10, and the anti-retraction member 31 is protruded from the side of the first base body 10 close to the second base body 20. The locking arm 32 is hinged to the second base body 20, and a first reset member 33 is provided between the locking arm 32 and the second base body 20. The PD door closing switch 100 of the present application can prevent the first base body 10 and the second base body 20 from being easily separated when the two are combined through the cooperation between the anti-retraction member 31 and the locking arm 32. When the first base body 10 and the second base body 20 are separated, it is only necessary to apply an external force exceeding the binding force of the anti-retraction member 31 and the locking arm 32, which is convenient and safe to operate. Since the locking arm 32 is hinged to the base body, when the anti-retraction member 31 applies an external force on the locking arm 32 from the side, the locking arm 32 is extended and retracted by rotating and swinging. The rotatably connected locking arm 32 can effectively avoid getting stuck, thereby improving the reliability of the PD door closing switch 100 structure.

[0045] In other embodiments, the anti-retraction member 31 may also be provided on the second base body 20, with the anti-retraction member 31 protruding from the side of the second base body 20 close to the first base body 10, the locking arm 32 being hinged to the first base body 10, and the first return member 33 being provided between the locking arm 32 and the second base body 20. That is, the positions of the anti-retraction member 31 and the locking arm 32 can be interchanged as needed.

[0046] like Figure 2 and Figure 5 As described above, in this embodiment, a slot 321 corresponding to the anti-return member 31 is provided on the locking arm 32. The slot 321 can provide positioning for the anti-return member 31 to improve the coupling accuracy of the locking arm 32 and the anti-return member 31. In other embodiments, a groove can be provided on the anti-return member 31, and a protrusion that cooperates with the groove can be provided on the locking arm 32. The anti-return member 31 and the locking arm 32 can be clamped together by the cooperation between the groove and the protrusion. A receiving groove for accommodating the anti-return member 31 can also be provided on the first base body 10 or the second base body 20, and the locking arm 32 is provided at the opening of the receiving groove. When the anti-return member 31 passes over the locking arm 32 and enters the receiving groove, the locking arm 32 resets to prevent the anti-return member 31 from exiting the receiving groove. When the external force applied by the anti-return member 31 to the locking arm 32 is greater than the elastic force of the first reset member 33, the locking arm 32 swings back, allowing the anti-return member 31 to exit the receiving groove.

[0047] Furthermore, there are two locking arms 32, which are arranged opposite each other to form a snap ring with an opening corresponding to the anti-retraction member 31. By providing two oppositely arranged locking arms 32, the anti-retraction member 31 can be encircled from opposite sides, thereby increasing the contact area between the locking arms 32 and the anti-retraction member 31 and improving the reliability of the closed switch structure.

[0048] In this embodiment, each of the two locking arms 32 is equipped with a first return member 33, and the first return member 33 is a compression spring. In other embodiments, the two locking arms 32 can be connected by a tension spring, and in other embodiments, other elastic members that can achieve equivalent functions can also be used as the first return member 33.

[0049] Please refer to Figure 1 and Figure 5 The first base 10 or the second base 20 is provided with a mounting slot 34 for accommodating the locking arm 32. The mounting slot 34 contains a first stopper 35 and a second stopper 36 for limiting the swing range of the locking arm 32. The first stopper 35 and the second stopper 36 can limit the opening and closing range of the locking arm 32, ensuring that the locking arm 32 can move within its effective travel range and improving reliability.

[0050] Furthermore, a second cover plate (not marked in the figure) is provided at the opening of the mounting groove 34 , and the second cover plate is connected to the second base body 20 by screws.

[0051] Preferably, if Figure 1 As shown, the two opposite sides of the anti-retraction member 31 are provided with lead-in angles 311. The lead-in angles 311 can guide the anti-retraction member 31 when it enters and exits the clamping ring structure, facilitating the combination and separation of the anti-retraction member 31 and the locking arm 32.

[0052] like Figure 4 As shown, the anti-recoil member 31 includes a base 312 and an anti-recoil pin 313 fixedly connected to the base 312. The base 312 is detachably connected to the first base 10 or the second base 20 via fasteners. The base 312 is provided with an elongated hole 314 corresponding to the fastener, and the length of the elongated hole 314 extends horizontally. The elongated hole 314 facilitates fine-tuning the horizontal position of the anti-recoil pin 313. If there is any deviation between the first base 10 and the second base 20 installed on the door, the anti-recoil pin 313 can be adjusted to achieve docking with the locking arm 32.

[0053] Optionally, a limiting groove for accommodating the base 312 is provided on the first base body 10 or the second base body 20 .

[0054] Furthermore, the anti-recoil member 31 also includes an adjustment rod 315, which includes a connecting portion and an adjustment portion. The connecting portion is connected to the first base body 10 or the second base body 20, and the adjustment portion and the connecting portion are eccentrically arranged. The adjustment portion is connected to the base 312 and / or the anti-recoil pin 313. The bottom of the base 312 is provided with a first latch 316, and the first base body 10 or the second base body 20 is provided with a second latch corresponding to the first latch 316. By providing the adjustment rod 315 with an eccentric structure, the position of the anti-recoil pin 313 can be adjusted by rotating the adjustment rod 315, and the cooperation between the first latch 316 and the second latch can increase the friction between the base 312 and the first base body 10 or the second base body 20, thereby preventing the position of the anti-recoil pin 313 from changing after long-term use.

[0055] The PD door closing switch 100 of the present application further includes a blocking mechanism 40, which includes a baffle 41 and a second reset member 42. The baffle 41 is mounted on the first base 10, and the second reset member 42 connects the baffle 41 and the first base 10. When the first base 10 and the second base 20 are separated, the baffle 41 extends into the first slide 11. When the first base 10 and the second base 20 are docked, the baffle 41 is stored in the first base 10. By providing the baffle 41, when the first base 10 and the second base 20 are docked, the baffle 41 can be retracted into the first base 10 to prevent the baffle 41 from obstructing the sliding of the sliding sash. When the first base 10 and the second base 20 are separated, the baffle 41 extends into the first slide 11 to block the sliding sash, preventing the sliding sash from sliding out when rotating and opening, thereby posing a safety hazard.

[0056] Furthermore, the first base 10 is provided with a receiving slot (not shown) for accommodating the baffle 41. A guide rib (not shown) aligned with the sliding direction of the baffle 41 is provided within the receiving slot. A sliding slot (not shown) slidably engaged with the guide rib is provided on the baffle 41. The engagement of the sliding slot and the guide rib improves the sliding direction of the baffle 41, thereby enhancing precision. A first cover (not shown) is also provided at the opening of the receiving slot to cover the receiving slot. The first cover is detachably connected to the first base 10.

[0057] In this embodiment, the second reset member 42 is a compression spring, and a groove for accommodating the compression spring is provided on the baffle 41. A guide rod (not shown) is also provided in the accommodating groove for the compression spring to be mounted. In other embodiments, other elastic elements may also be used as the second reset member 42.

[0058] In one embodiment, a trigger member 43 is provided on the second base 20, corresponding to the baffle 41. The trigger member 43 is protruding from a side of the second base 20 adjacent to the first base 10. The trigger member 43 is used to push the baffle 41 back into the first base 10. Optionally, to shorten the trigger member 43 and increase its strength, an extension rod 44 corresponding to the trigger member 43 is connected to the baffle 41. One end of the extension rod 44 is connected to the baffle 41, and the other end extends toward the trigger member 43.

[0059] In one embodiment, the PD door closing switch 100 further includes an anti-falling mechanism 50 , which includes an anti-falling block and an anti-falling groove cooperating with the anti-falling block.

[0060] Optionally, the anti-fall block is provided on the side of the first base body 10 close to the second base body 20, and the anti-fall groove is provided on the side of the second base body 20 close to the first base body 10; or the anti-fall block is provided on the side of the second base body 20 close to the first base body 10, and the anti-fall groove is provided on the side of the first base body 10 close to the second base body 20. The anti-fall block and the anti-fall groove cooperate to ensure that the first base body 10 and the second base body 20 are on the same horizontal plane after docking, preventing the first slideway 11 and the second slideway 21 from falling off the movable rail and affecting the normal sliding of the sliding door.

[0061] In order to ensure the anti-fall effect, the bottom of the anti-fall trough should be parallel to the horizontal direction.

[0062] Furthermore, in this embodiment, the anti-fall block includes a first anti-fall block 51 and a second anti-fall block 53, and the anti-fall groove includes a first anti-fall groove 52 and a second anti-fall groove 54. The first anti-fall block 51 is arranged on the side of the second base body 20 away from the second slide 21, and the second anti-fall block 53 is arranged on the side of the second base body 20 close to the second slide 21. Correspondingly, the first anti-fall groove 52 and the second anti-fall groove 54 are arranged on the side of the first base body 10 close to the second base body 20.

[0063] Furthermore, in order to facilitate the insertion of the first anti-fall block 51 into the first anti-fall groove 52 and the second anti-fall block 53 into the second anti-fall groove 54, the end of the first anti-fall block 51 that first contacts the first anti-fall groove 52 is conical for easy introduction. Similarly, the end of the second anti-fall block 53 that first contacts the second anti-fall groove 54 is also conical.

[0064] Optionally, in order to prevent interference between the first base body 10 and the second base body 20 when they are docked, the docking surfaces of the first base body 10 and the second base body 20 are complementary inclined surfaces.

[0065] The present application also provides a PD door (not shown) that utilizes the above-mentioned PD closing switch. The PD door includes a door window (not shown) and the above-mentioned PD door closing switch 100. The door window includes a frame, a fixed rail, a movable rail, a casement sash, and a sliding sash. The fixed rail is fixed to the frame, the movable rail is hinged to the frame, the casement sash is mounted on the movable rail, and the sliding sash is slidably connected to the fixed rail and the movable rail. The first base 10 is mounted on the end of the movable rail near the fixed rail, and the second base 20 is mounted on the end of the fixed rail near the movable rail. The PD door with the above-mentioned PD door closing switch 100 also has the above-mentioned beneficial effects, which will not be repeated here.

[0066] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A PD door closing switch, comprising a first base (10) and a second base (20) that cooperate with each other, wherein the first base (10) is provided with a first slideway (11), and the second base (20) is provided with a second slideway (21) corresponding to the first slideway (11), characterized in that: The anti-retraction mechanism (30) further comprises an anti-retraction member (31) and a locking arm (32), wherein the anti-retraction member (31) and the locking arm (32) cooperate to restrict the separation of the first seat body (10) and the second seat body (20); The anti-retraction member (31) is provided on the first base (10), and the anti-retraction member (31) is protruding from a side of the first base (10) close to the second base (20), the locking arm (32) is hinged to the second base (20), and a first resetting member (33) is provided between the locking arm (32) and the second base (20); or The anti-retraction member (31) is arranged on the second base body (20), and the anti-retraction member (31) is protruded from one side of the second base body (20) close to the first base body (10). The locking arm (32) is hinged to the first base body (10), and a first resetting member (33) is arranged between the locking arm (32) and the second base body (20).

2. The PD door closing switch according to claim 1, characterized in that: The locking arm (32) is provided with a locking groove (321) corresponding to the anti-retraction component (31).

3. The PD door closing switch according to claim 2, characterized in that: There are two locking arms (32), and the two locking arms (32) are arranged opposite to each other to form a snap ring with an opening corresponding to the anti-retraction component (31).

4. The PD door closing switch according to claim 3, characterized in that: Lead-in angles (311) are provided on opposite sides of the anti-retraction component (31).

5. The PD door closing switch according to claim 1, characterized in that: The first base (10) or the second base (20) is provided with a mounting groove (34) for accommodating the locking arm (32), and a first limiting block (35) and a second limiting block (36) for limiting the swing amplitude of the locking arm (32) are provided in the mounting groove (34).

6. The PD door closing switch according to claim 1, characterized in that: The anti-recoil member (31) comprises a base (312) and an anti-recoil pin (313) connected to the base (312); the base (312) is detachably connected to the first base body (10) or the second base body (20) via a fastener; an elongated hole (314) corresponding to the fastener is provided on the base (312); and the length of the elongated hole (314) extends in the horizontal direction.

7. The PD door closing switch according to claim 6, characterized in that: The anti-recoil member (31) further includes an adjusting rod (315), the adjusting rod (315) including a connecting portion and an adjusting portion, the connecting portion being connected to the first seat body (10) or the second seat body (20), the adjusting portion and the connecting portion being eccentrically arranged, the adjusting portion being connected to the base (312) and / or the anti-recoil pin (313), the bottom of the base (312) being provided with a first latching tooth (316), and the first seat body (10) or the second seat body (20) being provided with a second latching tooth corresponding to the first latching tooth (316).

8. The PD door closing switch according to claim 1, characterized in that: The device further comprises a blocking mechanism (40), wherein the blocking mechanism (40) comprises a baffle (41) and a second reset member (42), wherein the baffle (41) is mounted on the first base (10), and the second reset member (42) connects the baffle (41) and the first base (10); When the first seat body (10) and the second seat body (20) are separated, the baffle (41) extends into the first slideway (11); When the first seat body (10) and the second seat body (20) are docked in place, the baffle (41) is received in the first seat body (10).

9. The PD door closing switch according to claim 1, characterized in that: It also includes an anti-falling mechanism (50), which includes an anti-falling block and an anti-falling groove that cooperates with the anti-falling block; The anti-fall block is arranged on a side of the first base body (10) close to the second base body (20), and the anti-fall groove is opened on a side of the second base body (20) close to the first base body (10); or The anti-fall block is arranged on a side of the second base body (20) close to the first base body (10), and the anti-fall groove is opened on a side of the first base body (10) close to the second base body (20).

10. A PD door, characterized in that: It comprises a door and window body and a PD door closing switch (100) as described in any one of claims 1 to 9, wherein the door and window body comprises a frame, a fixed rail, a movable rail, a casement sash and a sliding sash, the fixed rail is fixed on the frame, the movable rail is hinged to the frame, the casement sash is installed on the movable rail, the sliding sash is slidably connected to the fixed rail and the movable rail, the first seat body (10) is installed on one end of the movable rail close to the fixed rail, and the second seat body (20) is installed on one end of the fixed rail close to the movable rail.

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