WO2018028203A1

WO2018028203A1 - Opening device used in sliding window and sliding window

Info

Publication number: WO2018028203A1
Application number: PCT/CN2017/077032
Authority: WO
Inventors: 刘阔天; 陈大鹏
Original assignee: 长春阔尔科技股份有限公司
Priority date: 2016-08-08
Filing date: 2017-03-17
Publication date: 2018-02-15
Also published as: CN107701006A; CN107701006B; DK3498957T3; EP3498957A4; EP3498957B1; EP3498957A1

Abstract

An opening device used in sliding windows and a sliding window. The opening device comprises: a base (3), a rotating axle (4), a guide cable (2), a fastener, a threaded shaft (7), a threaded shaft nut (8), an orienting component, a first friction component (5), a second friction component (6), and a flexible component. The rotating axle (4) is installed on the base (3). The guide cable (2) is wound around the rotating axle (4). The fastener is installed between the base (3) and the rotating axle (4). The threaded shaft (7) rotates with the rotating axle (4). The threaded shaft nut (8) engages with the threaded shaft (7). The orienting component is installed on the base (3) and restricts a rotation of the threaded shaft nut (8). The first friction component (5) is sleevingly installed on the threaded shaft (7), and moves, with the rotation of the threaded shaft (7), axially along the threaded shaft (7). The second friction component (6) is fixedly installed on the base (3) and forms a frictional engagement with the first friction component (5). The flexible component is installed between the first frictional component (5) and the threaded shaft nut (8). When the rotating axle (4) rotates along a first direction, the guide cable (2) unwinds from the rotating axle (4) and the threaded axle nut (8) moves towards the side of the second frictional component (6) to press against the first frictional component (5), thereby increasing a frictional force between the first frictional component (5) and the second frictional component (6).

Description

Opening device for sliding window and sliding window

The present application claims priority to Chinese Patent Application No. 201610642725.X, entitled "Opening Device for Sliding Windows and a Sliding Window", filed on August 08, 2016, The entire contents are incorporated herein by reference.

Technical field

The present invention relates to the field of sliding window technology, and in particular to an opening device for a sliding window; the present invention also relates to a sliding window using the foregoing opening device

Background technique

The sliding window is a new type of window that can be opened in the vertical direction, and is gradually applied in the field of building construction. The sliding window mainly includes a sliding opening fan, a frame border and an opening device, wherein the frame border is further divided into a vertical border and a horizontal border. A variable guide member is mounted on the vertical frame, and a surface of the sliding opening fan that cooperates with the vertical frame is provided with a guiding member that is inserted into the redirecting guide member and can move up and down along the redirecting guide member. The traction cable in the opening device is connected with the sliding opening fan, and the traction cable drives the sliding opening fan to move up and down along the guiding guide. Generally, the power component of the sliding window is a driving motor, and the driving motor rotates to drive the corresponding transmission mechanism and the traction cable to realize the opening and closing of the movable window. However, when the building is powered off, the drive motor cannot be rotated, and the sliding open fan cannot be normally opened and closed.

In order to realize the normal opening and closing of the sliding window under the condition of power failure, a utility model patent No. 201420424671.6 discloses a "sliding window unpowered opening system". 1 is a schematic view of the unpowered opening device, FIG. 2 is a schematic side view of the unpowered opening device, and FIG. 3 is a schematic view of the damping device in the unpowered opening device. As shown in FIGS. 1 to 3, the unpowered opening device includes a casing 01, a rocker 02, a ratchet shaft 03, a traction sheave 04, a ratchet 05, a pawl 06, a compression spring 07, a friction plate 08, a friction ring 09, and a button 010. . The ratchet shaft 03 and the housing 01 are rotatably connected, and the traction cable 04, the ratchet 05 and the friction plate 08 are fixed on the ratchet shaft 03, and the rocker 02 and the ratchet shaft 03 are fixedly connected and extended outside the housing 01; The compression spring 07 is connected, and the other end is connected with the button 010; the friction ring 09 is also fixedly connected with the button 010; and one end of the traction cable 012 connecting the sliding opening fan 011 is fixedly connected to the traction cable wheel 04. When the pawl 06 is pressed against the ratchet ring 05 by the compression spring 07, the ratchet wheel 05 and the pawl 06 cooperate to prevent the ratchet shaft 03 from rotating, thereby preventing the traction cable 012 wound on the ratchet shaft 03 from being released, and the sliding opening fan 011 is at Stationary state. When the button 010 is pressed to a certain extent, the ratchet mechanism is unlocked; under the gravity of the sliding opening fan 011, the traction cable 012 drives the ratchet shaft 03 to rotate and unwinds from the ratchet shaft 03, and the sliding opening fan 011 falls; At the same time as 010, the friction ring 09 comes into contact with the friction plate 08 and generates sliding frictional resistance, preventing the sliding opening fan 011 from falling too fast.

However, when the aforementioned unpowered opening device is employed, the frictional force formed by the friction ring 09 and the friction plate 08 is determined by the pressing force of the button 010. However, in actual operation, it is difficult for the operator to control the pressure of the button 010, so the frictional force generated between the friction ring 09 and the friction plate 08 also changes with the pressure of the button 010, and it is difficult to control the sliding opening. The falling speed of the fan 011; if the frictional force is less than the pulling force exerted by the sliding opening fan on the traction cable 012, the falling speed of the sliding opening fan 011 is getting faster and faster during the falling process, and it will seriously impact the lower frame when reaching the lower frame of the window. The border and side borders cause deformation or damage to the parts of the form. Therefore, it is a problem that one skilled in the art needs to solve to provide an opening device that is still operable in a power-off state and can effectively control the falling speed of the sliding opening fan.

Summary of the invention

In order to solve the problem that the existing unpowered opening device cannot provide sufficient friction to reduce the impact of the window frame when the sliding opening fan falls, the present invention provides a new opening device for the sliding window; A sliding window using the aforementioned opening device is provided.

The present invention provides an opening device for a sliding window, comprising a base, a rotating shaft, a traction cable and a locking member; the rotating shaft is rotatably mounted on the base; the traction cable is wound around the rotation The locking member is configured to control the rotation of the rotating shaft relative to the base; and further comprising:

a lead screw coupled to the rotating shaft and rotating with the rotating shaft;

a screw nut that is threaded with the lead screw;

a guide member for guiding the screw nut to move in an axial direction of the lead screw to restrict rotation of the lead screw nut; the guide member is fixedly disposed on the base;

a first friction member that is fitted over the lead screw and that is rotatable with the lead screw and movable in an axial direction of the lead screw;

a second friction member fixedly mounted on the base and frictionally engaged with the first friction member; the second friction member and the spindle nut are located on both sides of the first friction member

An elastic member mounted between the first friction member and the spindle nut;

When the rotating shaft rotates in the first direction, the traction cable is unwound from the rotating shaft, and the spindle nut moves toward the second friction member side and presses the elastic member.

Optionally, the lead screw nut has a threaded hole; and further comprises an adjusting screw threadedly engaged with the threaded hole and abutting against the elastic member.

Optionally, an adjustment plate between the elastic member and the adjusting screw is further included.

Optionally, the elastic component is a disc spring having a through hole; the disc spring is fitted on the lead screw through the through hole.

Optionally, the lead screw is coaxially disposed and fixedly connected to the rotating shaft.

Optionally, the guiding member is a guiding limiting hole disposed on the base.

Optionally, further comprising a reel wound around the traction cable; the reel is fixedly mounted on the rotating shaft; the reel has a spiral groove for accommodating the traction cable.

Optionally, the rotating shaft and/or the screw end have a groove for connecting the rocker.

Optionally, the locking member comprises: a ratchet fixedly mounted on the rotating shaft or the lead screw, a pawl matched with the ratchet, a sleeve fixedly mounted on the base; the locking member Also included is a compression spring, a spring positioning nut, a lever stop and a handle; the spring positioning nut is fixedly mounted at an end of the sleeve away from the ratchet, having a through hole through the pawl; the pawl is worn Passing through the sleeve and the spring positioning nut, one end is engaged with the ratchet, and the other end is mounted with the lever blocking pad; the compression spring is mounted in the sleeve, one end abuts against the pawl, and the other end Abutting the pawl against the ratchet against the spring positioning nut; the handle is hinged on the base, and one end abuts against a lower end of the lever stop

The present invention provides a sliding window comprising a sliding opening fan and an opening device as previously described, the traction cable of the opening device being coupled to the sliding opening fan.

The invention provides an opening device comprising a traction cable, a base, a rotating shaft, a first friction component, a second friction component, a lead screw, a screw nut and an elastic component; when the traction cable is unwound from the rotating shaft, The rotating shaft drives the screw to rotate, and the screw rotates to move the screw nut toward the second friction member; since one end of the elastic member abuts against the screw nut and the other end abuts against the first friction member, the elastic of the screw nut during the movement The component is compressed and deformed, and the first friction member is attached to the second friction member; as the rotating shaft continues to rotate, the degree of compression deformation of the elastic member gradually increases, and the deformation force acting on the first friction member gradually increases, so The frictional force generated between a friction member and the second friction member is gradually increased. During the sliding of the sliding opening fan, the frictional force is gradually increased from small to greater than the traction force of the traction cable, so that the speed of the sliding opening fan is lowered to a minimum point when the sliding opening fan is lowered to a certain degree, thereby preventing the sliding of the sliding opening fan from being too large and seriously impacting the window. Lower and side borders reduce the possibility of deformation or damage to the form.

In an embodiment of the invention, there is a threaded hole in the lead screw nut, and an adjusting screw is mounted in the thread, and one end of the adjusting screw abuts against the elastic member and is rotatable relative to the threaded hole. Therefore, according to the sliding force of the sliding opening fan, the initial deformation degree of the elastic member can be adjusted, and the sliding opening fan of different sizes or weights can be adapted.

The sliding window provided by the present invention adopts the aforementioned opening device, and the beneficial effects in use thereof are as described above, and will not be repeated herein.

DRAWINGS

In order to more clearly illustrate the background art or the technical solutions of the present invention, the following drawings in conjunction with the prior art or the specific embodiments are briefly described; obviously, the following drawings in conjunction with the specific embodiments are only for For easy understanding of the embodiments of the present invention, those skilled in the art can In addition, other drawings can also be obtained from these drawings;

Figure 1 is a schematic overall view of the unpowered opening device;

Figure 2 is a side view of the unpowered opening device;

Figure 3 is a schematic view of a damping device in an unpowered opening device;

Figure 4 is a cross-sectional view showing an opening device for a sliding window according to an embodiment of the present invention;

Figure 5 is a side view of an opening device for a sliding window according to an embodiment of the present invention;

Figure 6 is a front elevational view of a sliding window of an embodiment of the present invention;

Figure 1 - Figure 3: 01-box, 02-shake, 03-ratchet shaft, 04-traction cable, 05-ratchet, 06-pawl, 07-pressure spring, 08-friction, 09-friction Ring, 010-button, 011-slide open fan, 012-traction cable;

Figure 4-6: 1-sliding opening fan, 2-tracting cable, 3-base, 31-guide limiting hole, 4-rotating shaft, 5-first friction member, 6-second friction member, 7 -screw, 71-groove, 8-screw nut, 81-threaded hole, 9-disc spring, 10-adjustment screw, 11-adjustment plate, 12-reel, 13-ratchet, 14-pawl, 15-spring, 16-sleeve, 17-spring positioning nut, 18-lever block, 19-handle, 20-opening device, 21-moving pulley, 22-drive motor, 23-side frame.

detailed description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention.

4 is a cross-sectional view of an opening device for a sliding window according to an embodiment of the present invention, FIG. 5 is a side view of the opening device in the embodiment of the present invention, and FIG. 5 is a side view of an opening device for a sliding window according to an embodiment of the present invention. As can be seen from FIG. 4, the opening device in this embodiment includes the traction cable 2, the base 3, the rotating shaft 4, the first friction member 5, the second friction member 6, the lead screw 7, the screw nut 8, and the dish shape. Spring 9 and locking member.

The base 3 has a mounting cavity, and the rotating shaft 4 is mounted in the mounting cavity of the base 3 through a bearing and is rotatable relative to the base 3; one end of the traction cable 2 is fixedly connected with the rotating shaft 4, and the other end and the sliding opening fan 1 or drive the drive to slide the opening fan 1 to move. A locking member is mounted between the base 3 and the rotating shaft 4 for controlling the rotation of the rotating shaft. The lead screw 7 and the rotating shaft 4 are coaxially arranged and fixedly connected, and the rotating shaft 4 drives the lead screw 7 to rotate together.

The right side of the base 3 has a guiding limiting hole 31 extending in a direction parallel to the axial direction of the lead screw 7 and the rotating shaft 4; the screw nut 8 is mounted in the guiding limiting hole 31, and Moving in the extending direction of the guide limiting hole 31; the guiding hole limit 31 restricts the screw nut 8 from rotating in the circumferential direction; the lead screw 7 and the screw nut 8 are screwed. With the foregoing structure, when the lead screw 7 rotates, the lead screw nut 8 is translated in the axial direction of the lead screw 7 under the guiding action of the guide limiting hole 31.

The deformation direction of the disc spring 9 is parallel to the extending direction of the lead screw 7, and one end of the disc spring 9 abuts against the screw nut 8, and the other end abuts against the first friction member 5. The second friction member 6 is fixedly mounted on the base 3, and the friction surface of the first friction member and the friction surface of the second friction member 6 are opposed to each other. The first friction member 5 is keyed to the lead screw 7 and is movable in the axial direction of the lead screw 7.

In addition, there are corresponding opening components on the opening device. When the opening member is opened, under the action of the sliding opening fan 1, the traction lock 2 is unwound from the rotating shaft 4 and drives the rotating shaft 4 to rotate. The screw nut 8 is driven by the lead screw 7 and the guiding limiting hole 31. The guiding action is to move to the second friction member 6. Since the second friction member 6 is fixedly mounted on the base 3, when the spindle nut 8 is moved to a certain position, the disc spring 9 is deformed and the friction surface of the first friction member 5 and the friction surface of the second friction member 6 are deformed. Surface contact occurs. Because of the key connection action, the first friction member 5 rotates as the lead screw 7 rotates, and the friction surface between the friction surface of the first friction member 5 and the friction surface of the second friction member 6 is relatively slid to generate a frictional force. However, since the frictional force is smaller than the traction force of the sliding opening fan 1 acting on the traction cable 2, the sliding opening fan 1 continues to fall and drives the traction cable 2 to unwind.

As the rotation of the rotating shaft 4 continues, the distance between the screw nut 8 and the second friction member 6 gradually decreases, and the degree of deformation of the disc spring 9 under the pressing action of the screw nut 8 and the second friction member 6 The larger the volume, the greater the elastic deformation force. The deformation force generated by the disc spring 9 acts on the first friction member 5 such that the frictional force between the friction surface of the first friction member 5 and the friction surface of the second friction member 6 is gradually increased. When the traction cable 2 is unwound to a certain extent, the frictional force generated between the first friction member 5 and the second friction member 6 is the same as the traction force of the sliding opening fan 1 acting on the traction cable 2, and the sliding opening fan 1 falls. The speed is maximized. At this time, the traction cable 2 continues to unwind.

As the traction cable 2 continues to unwind, the spindle nut 8 continues to approach the second friction member 6, the degree of deformation of the disc spring 9 is further increased, and the friction between the first friction member 5 and the second friction member 6 is greater than that of the sliding When the pulling force of the fan 1 acting on the traction cable 2 is turned on, the falling speed of the sliding opening fan 1 is slowed down, and the unwinding speed of the traction cable 2 is also slowed down. When the final sliding opening fan 1 falls to the lowest point, the traction cable 2 is substantially unwound.

With the aforementioned opening device, the speed of the sliding opening fan 1 is lowered when it falls to the lowest point, so that the impact on the lower frame of the window and the corresponding components can be reduced. In a specific implementation, if the distance between the screw nut 8 and the second friction member 6, the frictional surface of the first friction member 5 and the friction surface of the second friction member 6, and the elastic deformation coefficient of the disc spring 9 are selected properly When the sliding opening fan 1 falls to the lowest point, the speed is also basically reduced to zero, and the impact force is also minimized.

The opening device in this embodiment uses the disc spring 9 as an elastic member to generate deformation and increase friction. As shown in FIG. 4, the present embodiment employs a plurality of disc springs 9 stacked to increase the elastic force. Minimizing the dimension along the radial direction of the lead screw 7, thereby reducing the size of the entire opening device; each of the disc springs 9 has a through hole in the middle thereof and is sleeved on the lead screw 7 through the through hole; it is conceivable that In order to ensure deformation, each of the disc springs 9 should be movable in the axial direction of the lead screw 7. Of course, other types of resilient members may be used in place of the disc spring 9 in other embodiments.

As described above, the rotating shaft 4 and the lead screw 7 in the opening device of the present embodiment are coaxially fixedly disposed, and the rotating shaft 4 and the lead screw 7 can be integrally provided in actual production. Of course, in other embodiments, the lead screw 7 and the rotating shaft 4 can also be disposed on different axes. For example, the lead screw 7 and the rotating shaft 4 can be arranged in parallel but different axes, and the gears of the corresponding positions are arranged, and the two gears are meshed and matched. The rotating shaft 4 drives the lead screw 7 to rotate by the gear meshing.

As shown in Fig. 5, the lead screw nut 8 in this embodiment further has a threaded hole 81. In addition, an adjusting screw 10 is provided, the adjusting screw 10 and the threaded hole 81 are screw-fitted, and one end of the adjusting screw 10 abuts against the disc spring 9. In actual production applications, the corresponding weight varies depending on the size of the sliding opening fan 1. The sliding opening 1 weight change causes the traction force acting on the traction to be different, and the aforementioned screw hole 81 and the adjusting screw 10 are provided, and the disc spring 9 can be adjusted according to the actual weight of the sliding opening fan 1 and the specific condition of the disc spring 9. The degree of deformation, adaptively adjust the amount of friction. 4 and 5, the adjusting screw 10 is provided on the upper and lower sides of the screw nut 8, ensuring uniform deformation of the disc spring 9. In order to further ensure the circumferential deformation uniformity of the disc spring 9, the embodiment further has an adjusting plate 11 which is an annular plate having a through hole, and the adjusting plate 11 is placed on the lead screw 7 and located Between the disc spring 9 and the adjusting screw 10. The adjusting screw 10 adjusts the degree of deformation of the disc spring 9 by adjusting the position of the adjusting plate 11. As shown in FIG. 4 and FIG. 5, the adjusting screw 10 used in this embodiment is a countersunk screw, and the countersunk screw is installed in the threaded hole 81 without leaking, so that the sharp protruding portion of the entire opening device can be reduced, and Reduce the possibility of injury from sharp projections.

In this embodiment, the guide rod limiting hole 31 is located on the base 3, and other guiding guides may be used instead of the guide limiting hole 31 in other embodiments.

4, in order to ensure that the traction cable 2 can be wound on the rotating shaft 4, a reel 12 is provided on the rotating shaft 4, and the reel 12 has a slot for positioning the traction cable 2.

As shown in FIG. 4, the locking member includes a ratchet 13, a pawl 14, a sleeve 16, a compression spring 15, a spring positioning nut 17, and a handle 19. The ratchet 13 is fixedly mounted on the rotating shaft 4 or the lead screw 7, and can rotate as the rotating shaft 4 rotates; the pawl 14 and the compression spring 15 are installed in the sleeve 16, and one end of the pawl 14 is engaged with the ratchet of the ratchet 13; The spring positioning nut 17 is mounted on the top end of the sleeve 16; the spring positioning nut 17 and the pawl 14 are coupled to the compression spring 15 to compress the compression spring 15, and the deformation force generated by the compression of the compression spring 15 acts on the pawl 14 to cause the pawl 14 Fitted with ratchets. In addition, the other end of the pawl 14 extends out of the sleeve 16 and mounts the lever stop 18; the handle 19 is hinged on the base 3, one end abuts against the lower end of the lever retaining ring, and the other end is the operating end; when the right side is toggled When the handle 19 is used, the handle 19 drives the lever stop 18 and the pawl 14 to move up, the engagement of the pawl 14 and the ratchet 13 is released, and the opening device is opened; when the handle 19 is released, the pawl is acted upon by the deformation force of the compression spring 15. 14 moves down and re-engages with the ratchet wheel 13. It is contemplated that other types of opening members, such as latches, may also be provided in other embodiments.

Figure 6 is a front elevational view of a sliding window in accordance with an embodiment of the present invention. As shown in FIG. 5, the sliding window in this embodiment has a sliding opening fan 1, a side frame 23, a horizontal frame, and the aforementioned opening device 20, and the sliding opening fan 1 moves up and down along the side frame 23. Specifically, the embodiment further has a driving motor 22 and a pulley block. The aforementioned opening device 20 is connected to the movable pulley 21 in the pulley block for opening the sliding opening fan 1 of the control window sliding window in the case of power failure or the like. In addition, in some cases where it is inconvenient to arrange the wires, the opening device 20 driving window in the embodiment can also be directly used. The body is opened and closed without the drive motor 22 being set. In order to achieve the closing of the window, a power component that drives the traction cable 2 to wrap should also be provided on the opening device 20. As shown in FIG. 4, a groove 71 for mounting the rocker 02 may be disposed at the end of the screw shaft 7. The rotation of the screw shaft 7 and the rotating shaft 4 is rotated by the cooperation of the groove 71 and the rocker 02, so that the traction cable 2 is wound around the rotation. On the shaft 4. In other embodiments, other power components may be used to complete the winding of the traction cable 2.

The opening device and the sliding window in the embodiment of the present invention are described in detail above. The principles and embodiments of the present invention are described in the detailed description of the present invention. The embodiments of the present invention are only used to help understand the core idea of the present invention. Without departing from the principles of the present invention, those skilled in the art All other embodiments obtained under the premise of creative labor are within the scope of the invention.

Claims

An opening device for a sliding window, comprising a base (3), a rotating shaft (4), a traction cable (2) and a locking member;

The rotating shaft (4) is rotatably mounted on the base (3); the traction cable (2) is wound on the rotating shaft (4); the locking member is used to control the rotating shaft (4) rotating relative to the base (3); characterized in that it further comprises:

a lead screw (7) coupled to the rotating shaft (4) and rotating with the rotating shaft (4);

a threaded nut (8) threadedly engaged with the lead screw (7);

a guide member that guides the spindle nut (8) to move in an axial direction of the lead screw (7) to restrict rotation of the lead screw nut (8); the guide member is fixedly disposed on the base ( 3) on;

a first friction member (5) fitted over the lead screw (7), rotatable with the lead screw (7) and movable in the axial direction of the lead screw (7);

a second friction member (6) fixedly mounted on the base (3), frictionally engaged with the first friction member (5); the second friction member (6) and the spindle nut (8) ) located on both sides of the first friction member (5);

An elastic member mounted between the first friction member (5) and the lead screw nut (8);

When the rotating shaft (4) rotates in the first direction, the traction cable (2) is unwound from the rotating shaft (4), and the lead screw nut (8) is directed to the second friction member (6) The side moves and compresses the elastic member.
The opening device for a sliding window according to claim 1, wherein:

The lead screw nut (8) has a threaded hole (81); and further includes an adjusting screw (10) that is threadedly engaged with the threaded hole (81) and abuts against the elastic member.
The opening device for a sliding window according to claim 2, wherein:

Also included is an adjustment plate (11) between the resilient member and the adjustment screw (10).
The opening device for a sliding window according to any of claims 1-3, characterized in that:

The elastic member is a disc spring (9) having a through hole; the disc spring (9) is fitted over the lead screw (7) through the through hole.
The opening device for a sliding window according to claim 4, wherein:

The lead screw (7) is coaxially arranged and fixedly connected to the rotating shaft (4).
The opening device for a sliding window according to claim 5, characterized in that:

The guiding member is a guiding limiting hole (31) disposed on the base (3).
The opening device for a sliding window according to claim 6, wherein:

Also included is a spool (12) wound around the traction cable (2); the spool (12) is fixedly fitted over the rotating shaft (4); the spool (12) has a receiving cable ( 2) Spiral groove.
The opening device for a sliding window according to claim 7, wherein:

The end of the rotating shaft (4) and/or the lead screw (7) has a recess (71) for connecting the rocker.
The opening device for a sliding window according to any one of claims 1 to 3, wherein the locking member comprises:

a ratchet (13) fixedly mounted on the rotating shaft (4) or the lead screw (7), and a pawl (14) fitted to the ratchet (13) fixedly mounted on the base (13) Sleeve (16);

The locking member further includes a compression spring (15), a spring positioning nut (17), a lever stop (18) and a handle (19);

The spring positioning nut (17) is fixedly mounted at an end of the sleeve (16) away from the ratchet (13), having a through hole through the pawl (14);

The pawl (14) passes through the sleeve (16) and the spring positioning nut (17), one end is engaged with the ratchet (13), and the other end is mounted with the lever blocking pad (18);

The compression spring (15) is mounted in the sleeve (16) with one end abutting the pawl (14) and the other end abutting the spring positioning nut (17) to cause the pawl (14) Engaging with the ratchet (13);

The handle (19) is hingedly mounted on the base (3) with one end abutting the lower end of the lever stop (18).
A sliding window, comprising: a sliding opening fan (1) and an opening device (20) according to any one of claims 1-9, the traction cable (2) of the opening device (20) The sliding open fan (1) is connected.