CN213742959U

CN213742959U - Flat-open door and window

Info

Publication number: CN213742959U
Application number: CN202022537261.0U
Authority: CN
Inventors: 叶群英; 涂星伯
Original assignee: Shaoxing Shengya Intelligent Technology Co ltd
Current assignee: Shaoxing Shengya Intelligent Technology Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-07-20
Anticipated expiration: 2030-11-05

Abstract

The application relates to a casement door and window, which comprises a plurality of mounting frames arranged on a wall body and a door and window body rotatably arranged on the mounting frames, wherein a driving mechanism and an elastic piece are arranged in the mounting frames, the driving mechanism is connected with the door and window body, and the elastic piece is connected with the door and window body when the door and window body is closed. This application has and promotes the door and window body and rotate and open, has reduced the phenomenon that door and window can not be opened to make the flue gas discharge smoothly.

Description

Flat-open door and window

Technical Field

The application relates to the technical field of windows, in particular to a casement door and window.

Background

At present, a window can be divided into a fixed window, a horizontally opened window, a sliding window and the like according to the opening mode of the window, wherein the horizontally opened window is a window which is formed by connecting a window sash to the side edge of a window frame through a hinge and enabling the window sash to rotate in the vertical direction to open and close by adopting the sliding mode.

In the prior art, many large-scale public indoor places are provided with a plurality of fire-fighting smoke discharging windows for natural ventilation and fire-fighting smoke discharging, the windows are provided with electric switches and lock tongues, the lock tongues are slidably arranged on the windows, and the electric switches are connected with the lock tongues and drive the lock tongues to slide; when opening the window, electric switch drive spring bolt and window frame break away from, make the connection between window and the frame loosen, and the window receives the influence of self gravity to produce and rotates to make the window open.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: when being connected between electric switch and the window and relaxing, the window need have certain inclination just can produce under self gravity and rotate, and when the window was vertical, the window difficult messenger's window of the decurrent gravity of window produced and rotates, makes the window unable open, leads to the unable smooth discharge of flue gas.

SUMMERY OF THE UTILITY MODEL

In order to reduce the phenomenon that the window can not be opened, make the flue gas discharge smoothly, this application provides a flat-open door and window.

The application provides a flat-open door and window adopts following technical scheme:

the utility model provides a flat-open door and window, is including setting up a plurality of installing frames on the wall body and rotating the installation and being in door and window body on the installing frame, be provided with actuating mechanism and elastic component in the installing frame, actuating mechanism with this body coupling of door and window, when door and window body is closed the elastic component with this body coupling of door and window.

Through adopting above-mentioned technical scheme, when actuating mechanism drive door and window body closed and lie in the installing frame, door and window body and elastic component contact, when actuating mechanism opened the door and window body, the elastic force of elastic component promoted the door and window body and leaves the installing frame, made the door and window body at the installing frame internal rotation, promoted the door and window body and rotated and opened, reduced the phenomenon that the window can not be opened to make the flue gas discharge smoothly.

Preferably, the elastic member comprises a fixed block, a first spring and a push plate; the fixed block is installed on the inner wall of installing frame, the one end of first spring is installed the fixed block orientation one side of door and window body, the push pedal is installed first spring is kept away from the one end of fixed block, the door and window body is located support tightly when in the installing frame the push pedal.

By adopting the technical scheme, when the door and window body is closed, the door and window body is positioned in the mounting frame, the door and window body abuts against the push plate towards the side wall of the mounting frame, and the push plate pushes the first spring and compresses the first spring; open the door and window body and make, when drive assembly opened the door and window body, first spring drive push pedal removed, and the push pedal promotes the door and window body and leaves to make the door and window body keep away from the one end of rotating the junction and leave the installing frame.

Preferably, actuating mechanism includes drive assembly, drive frame and wire rope, the drive frame is installed in the installing frame, the installation cavity has been seted up on the drive frame, drive assembly installs in the installation cavity, wire rope's one end penetrates in the installation cavity and with drive assembly connects, wire rope's the other end with this body coupling of door and window.

By adopting the technical scheme, the driving component drives the steel wire rope to contract or expand, and the steel wire rope is collected into the mounting cavity or pushed out of the mounting cavity, so that the steel wire rope pulls the door and window body to open or close.

Preferably, the driving assembly comprises a driving motor, a first screw rod, a second screw rod and a rotating part, the driving motor is installed at one end of the driving frame, the first screw rod and the second screw rod are both rotatably installed in the installation cavity and are parallel to each other, and one end of the first screw rod penetrates through the driving frame and is coaxially connected with the driving motor; a first sliding block is arranged on the first screw rod in a threaded connection mode, a second sliding block is arranged on the second screw rod in a threaded connection mode, and the first sliding block and the second sliding block both slide in the installation cavity; the wire rope has two and all penetrates the installation intracavity, penetrates two in the installation intracavity wire rope respectively with first slider and second slider are connected, rotate the piece and install the installation intracavity and respectively with first lead screw and second lead screw are connected.

By adopting the technical scheme, the driving motor drives the first lead screw to rotate, the first lead screw drives the second lead screw to be driven reversely through the rotating part, so that the first sliding block on the first lead screw and the second sliding block on the second lead screw move reversely, and the two steel wire ropes are driven to be taken in or discharged from the driving frame.

Preferably, the rotating member includes a first gear and a second gear, the first gear is coaxially mounted on the first lead screw, the second gear is coaxially mounted on the second lead screw, and the first gear and the second gear are engaged with each other.

By adopting the technical scheme, the first screw rod drives the first gear to rotate when rotating, the first gear drives the second gear to rotate reversely, and the second gear drives the second screw rod to rotate, so that the rotating directions of the first screw rod and the second screw rod are opposite.

Preferably, be provided with coupling mechanism on the door and window body, coupling mechanism is including installation piece and joint subassembly, the door and window body orientation seted up on the lateral wall of installing frame with installation piece grafting complex mounting groove, installation piece grafting is installed in the mounting groove, the joint subassembly is installed on the installation piece and with this body coupling of door and window, wire rope keeps away from the one end of drive yoke is installed on the installation piece.

Through adopting above-mentioned technical scheme, installation piece grafting is installed back in the mounting groove, joint subassembly and this body coupling of door and window on the installation piece to install piece fixed mounting in the mounting groove, make the easy dismounting of installation piece, and make detachable link together between wire rope and the door and window body, it is convenient to maintain.

Preferably, the clamping assembly comprises an elastic part and two insertion rods, a sliding cavity is formed in the mounting block, the elastic part is mounted in the sliding cavity, sliding holes are formed in two ends of the mounting block, and the axes of the two sliding holes are parallel to each other and are communicated with the sliding cavity; the groove side walls of the two sides of the mounting groove are provided with insertion grooves matched with the insertion rods in an insertion mode, the insertion rods are installed in the sliding holes in a sliding mode respectively in a sliding mode, one ends, close to the sliding cavities, of the insertion rods penetrate into the sliding cavities and are connected with the elastic pieces, and the ends, far away from the elastic pieces, of the insertion rods are installed in the insertion grooves in an insertion mode respectively.

Through adopting above-mentioned technical scheme, the back is installed in the mounting groove to the installation piece, and the elastic component drive peg graft pole slides and is close to the door and window body, and two peg graft poles are pegged graft respectively and are installed in the inserting groove, restrict the removal of installation piece to will install piece fixed mounting in the mounting groove.

Preferably, the elastic part comprises a pressure lever, a return spring and two connecting rods, a sliding groove in sliding fit with the pressure lever is formed in the side wall of the mounting block, the length direction of the sliding groove is perpendicular to the axial direction of the sliding hole, and the sliding groove is communicated with the sliding cavity; the pressure bar is installed in the sliding groove in a sliding mode, one end of the pressure bar penetrates out of the sliding groove, the reset spring is installed in the sliding groove, one end of the reset spring is connected with the groove bottom of the sliding groove, the other end of the reset spring is connected with the pressure bar, the two connecting rods are installed at two ends of the sliding cavity in a rotating mode respectively, one ends of the two connecting rods are installed on the pressure bar in a rotating mode, one ends, far away from the pressure bar, of the two connecting rods are installed at one ends, close to the sliding groove, of the two inserting rods respectively in a rotating mode, and the inserting rods are inserted into the inserting groove when the reset spring is in a natural state.

Through adopting above-mentioned technical scheme, press the depression bar, the depression bar drives two connecting rods and rotates at the intracavity that slides when sliding the inslot cunning, drives two peg graft poles and slides to the intracavity that slides when two connecting rods rotate to make two peg graft poles break away from the inserting groove, make the installation piece can follow the mounting groove and take out, thereby make the simple to operate of installation piece.

Preferably, a chamfer is formed in the side wall of one end, far away from the sliding cavity, of the insertion rod, and the chamfer is located on one side, facing the bottom of the mounting groove, of the insertion rod.

Through adopting above-mentioned technical scheme, when installing the installation piece into the mounting groove, can directly impress the mounting groove in the mounting groove, component force that produces when the chamfer on the grafting pole atress will peg graft the pole and push into the sliding hole to make the mounting groove can be impressed in the mounting groove, make the simple to operate of installation piece.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the setting of elastic component, promote the door and window body and rotate and open, reduced the phenomenon that the window can not be opened to make the flue gas discharge smoothly.

2. Through the arrangement of the driving mechanism, the steel wire rope can pull the door and window body to be opened or closed.

3. Through the arrangement of the connecting mechanism, the mounting block is convenient to disassemble and assemble, the push rod and the door and window body are detachably connected, and the maintenance is convenient.

Drawings

Fig. 1 is a schematic perspective view of a side-hung door window according to an embodiment of the present application;

fig. 2 is a schematic partial perspective view of an elastic member of a casement door and window according to an embodiment of the present application;

fig. 3 is a schematic partial perspective view of a driving mechanism of a casement door and window according to an embodiment of the present application, in which a driving frame is sectioned to show an internal structure;

fig. 4 is a schematic partial perspective view of a connecting mechanism of a casement door and window according to an embodiment of the application;

fig. 5 is a schematic partial perspective view of a clamping assembly of a side-hung door and window according to an embodiment of the present application, with a sectional view of an installation block to show an internal structure;

fig. 6 is a schematic view of a local explosion of a limiting rod of a casement door and window according to an embodiment of the application.

Reference numerals: 100. installing a frame; 110. a door and window body; 111. mounting grooves; 112. inserting grooves; 120. a wall body; 300. a drive mechanism; 310. a driving frame; 313. a limiting column; 314. a mounting cavity; 320. an elastic member; 321. a fixed block; 322. a first spring; 323. pushing the plate; 330. a wire rope; 400. a connecting mechanism; 410. a clamping assembly; 420. mounting blocks; 421. a sliding cavity; 422. a sliding hole; 423. a sliding groove; 430. an elastic member; 431. a pressure lever; 432. a return spring; 433. a connecting rod; 440. a plug rod; 441. chamfering; 450. a limiting rod; 451. a limiting port; 460. a containing groove; 461. a limiting spring; 462. a ball bearing; 510. a drive motor; 520. a first lead screw; 521. a first slider; 530. a second lead screw; 531. a second slider; 540. a rotating member; 541. a first gear; 542. a second gear.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

Referring to fig. 1, a flat-open door and window includes a plurality of mounting frames 100 and a plurality of door and window bodies 110 that are horizontally arranged on a wall 120 at intervals and are respectively hinged on the mounting frames 100, and elastic members 320 are arranged on two vertical inner side walls of the mounting frames 100.

Referring to fig. 1 and 2, the elastic member 320 includes a fixing block 321, a first spring 322, and a push plate 323; fixed block 321 is the rectangle, and fixed block 321 fixed mounting is on the inside wall of installing frame 100, and the one end fixed mounting of first spring 322 is in one side of fixed block 321 towards door and window body 110, and push pedal 323 is the rectangle and fixed mounting keeps away from the one end of fixed block 321 at first spring 322, makes push pedal 323 can slide on the level of the inside wall of installing frame 100.

Referring to fig. 1 and 3, a driving mechanism 300 is disposed on the upper wall of the mounting frame 100, the driving mechanism 300 includes a driving assembly, a driving frame 310 and two wire ropes 330, the driving frame 310 is rectangular, the driving frame 310 is horizontally and fixedly mounted on the upper wall of the mounting frame 100, a rectangular mounting cavity 314 is formed in the driving frame 310, and the length direction of the mounting cavity 314 is parallel to the length direction of the driving frame 310.

The driving assembly comprises a driving motor 510, a first screw rod 520, a second screw rod 530 and a rotating member 540, the driving motor 510 is fixedly installed at one end of the driving frame 310, the first screw rod 520 and the second screw rod 530 are both horizontally and rotatably installed in the installation cavity 314 and are parallel to each other, one end of the first screw rod 520 close to the driving motor 510 penetrates through the installation cavity 314 and is coaxially and fixedly connected with the driving motor 510; the first screw rod 520 is provided with a first slide block 521 in a threaded connection mode, the second screw rod 530 is provided with a second slide block 531 in a threaded connection mode, and the side walls of the first slide block 521 and the second slide block 531 are connected with the side wall of the installation cavity 314 in a sliding mode.

The rotating member 540 includes a first gear 541 and a second gear 542, the first gear 541 is coaxially and fixedly installed at one end of the first lead screw 520 far away from the driving motor 510, the second gear 542 is coaxially installed on the second lead screw 530, and the first gear 541 and the second gear 542 are engaged with each other.

Referring to fig. 1 and 3, one side of the driving frame 310 facing the door/window body 110 is provided with two through holes communicated with the mounting cavity 314, the two through holes are respectively located at two ends of the driving frame 310, two limiting columns 313 are vertically and fixedly arranged in the mounting cavity 314, the two limiting columns 313 are respectively located at two ends of the mounting cavity 314, and the two limiting columns 313 are close to the side wall where the through holes are located. One ends of the two steel wire ropes 330 respectively penetrate through the two through holes and penetrate into the mounting cavity 314, and the two steel wire ropes 330 penetrating into the mounting cavity 314 are respectively fixedly connected with the first sliding block 521 and the second sliding block 531. Two steel wire ropes 330 penetrating into the mounting cavity 314 are respectively wound on the two limiting columns 313.

Referring to fig. 4 and 5, two ends of the door window body 110 are both provided with a connecting mechanism 400, the connecting mechanism 400 includes a clamping component 410 and a rectangular mounting block 420, the side wall of the door window body 110 facing the mounting frame 100 is provided with two mounting grooves 111 in splicing fit with the mounting block 420, the two mounting grooves 111 are respectively located at two ends of the door window body 110, the two mounting grooves 111 are both located at one side of the door window body 110 far away from the hinge joint of the door window body 110 and the mounting frame 100, and the two mounting blocks 420 are respectively spliced and mounted in the two mounting grooves 111; one ends of the two steel wire ropes 330 far away from the driving frame 310 are respectively and fixedly connected with one sides of the two mounting blocks 420 far away from the bottom of the mounting groove 111.

Referring to fig. 4 and 5, a rectangular sliding cavity 421 is formed in the mounting block 420, cylindrical sliding holes 422 are formed in both ends of the mounting block 420, the axial extension lines of the two sliding holes 422 are collinear, and the two sliding holes 422 are respectively communicated with both ends of the sliding cavity 421; clamping subassembly 410 includes elastic component 430 and two plug rod 440, and the diameter of hole 422 that slides is the same with plug rod 440's diameter, and two plug rod 440 slide respectively and install in two holes 422 that slide, all seted up on the groove lateral wall of mounting groove 111 both sides with plug rod 440 grafting complex inserting groove 112, seted up curved chamfer 441 on the one end lateral wall that plug rod 440 kept away from chamber 421 that slides, chamfer 441 is located one side of plug rod 440 towards the mounting groove 111 tank bottom.

Referring to fig. 4 and 5, the elastic member 430 includes a pressure lever 431, a return spring 432 and two connecting rods 433, a sliding groove 423 slidably fitted with the pressure lever 431 is formed on the side wall of the mounting block 420, the length direction of the sliding groove 423 is perpendicular to the axial direction of the sliding hole 422, and the sliding groove 423 is communicated with the sliding cavity 421; the depression bar 431 slides and installs in sliding groove 423 and its one end penetrates in sliding chamber 421, reset spring 432 is installed in sliding chamber 421, reset spring 432's one end and the lateral wall fixed connection of sliding chamber 421, reset spring 432's the other end and the one end fixed connection that the depression bar 431 penetrated in sliding chamber 421, two connecting rods 433 rotate respectively and install the both ends at sliding chamber 421, the one end of two connecting rods 433 is all rotated and is installed on depression bar 431, two peg graft pole 440 all penetrate in sliding chamber 421 and rotate with the one end that two connecting rods 433 kept away from depression bar 431 respectively and be connected, when reset spring 432 was under natural state, peg pole 440 pegged graft and installs in peg graft groove 112.

Referring to fig. 4 and 6, a long-strip-shaped limiting rod 450 is rotatably mounted on the side wall of the mounting block 420, one end of the limiting rod 450 is rotatably mounted on the side wall of the mounting block 420, a limiting opening 451 which is in splicing fit with the limiting rod 450 is formed in the side wall of the end of the pressing rod 431, which penetrates through the sliding groove 423, the length direction of the limiting opening 451 is perpendicular to the length direction of the pressing rod 431, and when the plugging rod 440 is plugged in the plugging groove 112, the limiting rod 450 can be plugged in the limiting opening 451.

Cylindrical containing groove 460 is formed in the side wall of the mounting block 420, a limiting spring 461 and a ball 462 are arranged in the containing groove 460, the ball 462 is slidably mounted in the containing groove 460, one end of the limiting spring 461 is fixedly connected with the groove bottom of the containing groove 460, the other end of the limiting spring 461 is fixedly connected with the ball 462, a circular groove is formed in the side wall of the limiting rod 450 facing the mounting block 420, the limiting spring 461 is in a natural state and the limiting rod 450 is mounted in the limiting opening 451 in an inserting mode, and the ball 462 smaller than half of the volume is mounted in the circular groove in a clamping mode.

The implementation principle of a flat-open door and window of the embodiment of the application is as follows:

when the fire-fighting smoke exhaust window is opened, the driving motor 510 drives the first screw rod 520 to rotate, the first screw rod 520 drives the first gear 541 to rotate, the first gear 541 drives the second gear 542 to rotate, the second gear 542 drives the second screw rod 530 to rotate, the first slide block 521 on the first screw rod 520 and the second slide block 531 on the second screw rod 530 move in the installation cavity 314 in the opposite direction, and therefore the steel wire rope 330 is loosened.

The first spring 322 on the fixing block 321 pushes the push plate 323 to move under the action of the elastic force, the push plate 323 pushes the door and window body 110 to move and leave the mounting frame 100, and the wire rope 330 is pulled out from the through hole 312, so that the door and window body 110 is opened.

When the mounting block 420 is detached from the door/window body 110, the limiting rod 450 is rotated to separate the limiting rod 450 from the limiting opening 451, the pressing rod 431 is pressed, the pressing rod 431 compresses the return spring 432 and slides in the sliding groove 423, the pressing rod 431 drives the two connecting rods 433 to rotate, the two connecting rods 433 rotate to respectively drive the two inserting rods 440 to slide in the two sliding holes 422, the inserting rods 440 slide to be close to the pressing rod 431, the inserting rods 440 are separated from the inserting groove 112, and therefore the mounting block 420 is taken out from the mounting groove 111.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a flat-open door and window, installs including setting up a plurality of installing frames (100) on wall body (120) and rotation door and window body (110) on installing frame (100), its characterized in that: be provided with actuating mechanism (300) and elastic component (320) in installing frame (100), actuating mechanism (300) with door and window body (110) are connected, when door and window body (110) are closed elastic component (320) with door and window body (110) are connected.

2. The casement window and door according to claim 1, wherein: the elastic part (320) comprises a fixed block (321), a first spring (322) and a push plate (323); fixed block (321) are installed on the inner wall of installing frame (100), the one end of first spring (322) is installed fixed block (321) orientation one side of door and window body (110), push pedal (323) are installed first spring (322) are kept away from the one end of fixed block (321), door and window body (110) are located support tightly when installing frame (100) is interior push pedal (323).

3. The casement window and door according to claim 1, wherein: actuating mechanism (300) include drive assembly, drive frame (310) and wire rope (330), drive frame (310) are installed in installing frame (100), install chamber (314) have been seted up on drive frame (310), drive assembly installs in installation chamber (314), the one end of wire rope (330) penetrates in installation chamber (314) and with drive assembly connects, the other end of wire rope (330) with door and window body (110) are connected.

4. The casement window and door according to claim 3, wherein: the driving assembly comprises a driving motor (510), a first screw rod (520), a second screw rod (530) and a rotating piece (540), the driving motor (510) is installed at one end of the driving frame (310), the first screw rod (520) and the second screw rod (530) are both rotatably installed in the installation cavity (314) and are parallel to each other, and one end of the first screw rod (520) penetrates through the driving frame (310) and is coaxially connected with the driving motor (510); a first sliding block (521) is arranged on the first screw rod (520) in a threaded connection mode, a second sliding block (531) is arranged on the second screw rod (530) in a threaded connection mode, and the first sliding block (521) and the second sliding block (531) both slide in the installation cavity (314); two steel wire ropes (330) penetrate into the mounting cavity (314), the two steel wire ropes (330) penetrating into the mounting cavity (314) are respectively connected with the first sliding block (521) and the second sliding block (531), and the rotating part (540) is mounted in the mounting cavity (314) and is respectively connected with the first lead screw (520) and the second lead screw (530).

5. The casement window and door according to claim 4, wherein: the rotating member (540) comprises a first gear (541) and a second gear (542), the first gear (541) is coaxially installed on the first screw rod (520), the second gear (542) is coaxially installed on the second screw rod (530), and the first gear (541) and the second gear (542) are meshed with each other.

6. The casement window and door according to claim 3, wherein: be provided with coupling mechanism (400) on door and window body (110), coupling mechanism (400) are including installation piece (420) and joint subassembly (410), door and window body (110) orientation seted up on the lateral wall of installing frame (100) with installation piece (420) grafting complex mounting groove (111), installation piece (420) are pegged graft and are installed in mounting groove (111), install joint subassembly (410) install on installation piece (420) and with door and window body (110) are connected, wire rope (330) are kept away from the one end of driving frame (310) is installed on installation piece (420).

7. The casement window and door according to claim 6, wherein: the clamping assembly (410) comprises an elastic piece (430) and two insertion rods (440), a sliding cavity (421) is formed in the mounting block (420), the elastic piece (430) is mounted in the sliding cavity (421), sliding holes (422) are formed in two ends of the mounting block (420), and the axes of the two sliding holes (422) are parallel to each other and are communicated with the sliding cavity (421); the groove side walls of the two sides of the mounting groove (111) are respectively provided with an insertion groove (112) which is in insertion fit with the insertion rod (440), the two insertion rods (440) are respectively installed in the two sliding holes (422) in a sliding manner, one end, close to the sliding cavity (421), of each of the two insertion rods (440) penetrates into the sliding cavity (421) and is connected with the elastic piece (430), and one end, far away from the elastic piece (430), of each of the two insertion rods (440) can be respectively installed in the two insertion grooves (112) in an insertion manner.

8. The casement window and door according to claim 7, wherein: the elastic piece (430) comprises a pressure lever (431), a return spring (432) and two connecting rods (433), a sliding groove (423) matched with the pressure lever (431) in a sliding mode is formed in the side wall of the mounting block (420), the length direction of the sliding groove (423) is perpendicular to the axial direction of the sliding hole (422), and the sliding groove (423) is communicated with the sliding cavity (421); the pressure lever (431) is arranged in the sliding groove (423) in a sliding way, one end of the pressure lever penetrates out of the sliding groove (423), the return spring (432) is installed in the sliding groove (423), one end of the return spring (432) is connected with the groove bottom of the sliding groove (423), the other end of the return spring (432) is connected with the pressure lever (431), the two connecting rods (433) are respectively rotatably installed at two ends of the sliding cavity (421), one ends of the two connecting rods (433) are respectively rotatably installed on the pressure lever (431), one ends of the two connecting rods (433) far away from the pressure lever (431) are respectively rotatably installed at one ends of the two splicing rods (440) close to the sliding groove (423), when the return spring (432) is in a natural state, the insertion rod (440) is inserted into the insertion groove (112).

9. The casement window and door according to claim 7, wherein: a chamfer (441) is formed in the side wall of one end, away from the sliding cavity (421), of the insertion rod (440), and the chamfer (441) is located on one side, facing the bottom of the mounting groove (111), of the insertion rod (440).