A handle device and a system of inwardly opening inwardly tilting casement windows

Abstract

The application belongs to the technical field of door and window hardware fittings, and discloses a handle device and an in-swinging and in-swinging-out door and window system. The handle device comprises a handle, a handle seat, a transmission member and a transmission mechanism for driving the transmission member to move, the handle is rotationally connected to the handle seat, the transmission mechanism is connected to the handle seat and is in transmission connection with the handle and the transmission member, and the handle is connected with a hanging and locking mechanism which can be hung on the handle seat to lock the handle and can be manually unlocked by a user. The in-swinging and in-swinging-out door and window system comprises an in-swinging and in-swinging-out window sash and the handle device. The handle device and the in-swinging and in-swinging-out door and window system can effectively prevent the user from misoperation and accidental opening, have good handle anti-misoperation effect and good user experience.

Description

Technical Field

[0001] This invention belongs to the technical field of door and window hardware accessories, and particularly relates to a handle device and an inward-opening and tilt-and-turn door and window system. Background Technology

[0002] The existing door and window handles on the market generally lack anti-misoperation design or have unreasonable anti-misoperation design, resulting in poor anti-misoperation effect. Summary of the Invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems by providing a handle device and an inward-opening and tilting door and window system, which has a good anti-misoperation effect and a good user experience.

[0004] The technical solution of the present invention is: a handle device, including a handle, a handle seat, a transmission component, and a transmission mechanism for driving the transmission component to move. The handle is rotatably connected to the handle seat, and the transmission mechanism is connected to the handle seat and is transmissionally connected to the handle and the transmission component. The handle is connected to a hook locking mechanism that can be hooked onto the handle seat to lock the handle and can be manually unlocked by the user.

[0005] Specifically, the handle has three action states: the upper end is tilted up, both ends are balanced, and the lower end is tilted up. These three action states correspond to the three window sash modes: tilting inward, locking, and opening.

[0006] Specifically, the hook locking mechanism is provided in two sets and is located inside the handle and respectively on both sides of the pivot.

[0007] Specifically, the hook locking mechanism includes a hook rotatably connected to the handle and an elastic element abutting against the hook. One end of the hook is a hook end that can be hooked onto the handle seat, and the other end is an unlocking lever that can be pressed by the user.

[0008] Specifically, the handle seat has undercut flanges on both sides, and the undercut flanges near the handle have guide surfaces for guiding the hook to fasten onto the undercut flanges.

[0009] Specifically, the transmission mechanism includes a drive gear connected to the handle and rotating synchronously with the handle, the transmission component is slidably connected to the handle seat, and a rack is provided on the back of the transmission component, the rack meshing with the drive gear through an intermediate gear.

[0010] Specifically, the intermediate gear includes a first gear and a second gear that are coaxially fixedly connected. The second gear meshes with the driving gear, and the first gear meshes with the rack.

[0011] Specifically, the drive gear is fan-shaped or semi-circular.

[0012] Specifically, the handle seat has a mounting groove, the mounting groove is connected to a cover, and the transmission mechanism is disposed in the mounting groove.

[0013] Specifically, there are two drive gears, which are coaxially spaced apart. There are also two intermediate gears, which are spaced apart along the sliding direction of the rack and both mesh with the rack. The second gear of the two intermediate gears meshes with the drive gears.

[0014] Specifically, the hook locking mechanism is located on the inside of the handle.

[0015] Specifically, the handle includes a rotating connecting part, a left handle part, and a right handle part. The rotating connecting part is rotatably connected to the handle base. The left handle part and the right handle part are respectively connected to both sides of the rotating connecting part. Two hook locking mechanisms are provided, one of which is located on the side of the left handle part facing the handle base, and the other is located on the side of the right handle part facing the handle base.

[0016] Specifically, the inner side of the handle is provided with a movable groove for accommodating the hook locking mechanism, a return spring is provided between the hook locking mechanism and the handle, and the rear end of the hook locking mechanism protrudes from the movable groove.

[0017] Specifically, the hook-locking mechanism has a first limiting surface that hooks onto or abuts against the handle seat to restrict the rotation of the handle; the hook-locking mechanism also has a second limiting surface for restricting the rotation angle of the handle, the second limiting surface being offset vertically and horizontally from the first limiting surface.

[0018] Specifically, the front end of the hook locking mechanism has a limiting arm and a limiting hook integrally connected to the limiting arm and protruding from the limiting arm. The first limiting surface is disposed on the limiting hook, and the second limiting surface is disposed on the limiting arm.

[0019] Specifically, the transmission mechanism includes a driven tooth and a driving tooth that meshes with the driven tooth. The driven tooth is integrally disposed on or connected to the transmission member, and the driving tooth is connected to the handle.

[0020] Specifically, the handle seat is provided with a first positioning hole, and the driven tooth is rotatably connected to the first positioning hole through a first positioning shaft;

[0021] The handle seat is provided with a second positioning hole, and the drive gear is rotatably connected to the second positioning hole through a second positioning shaft;

[0022] The driven tooth has a recessed groove on one side, and the driving tooth extends into the recessed groove.

[0023] Specifically, the connection between the second positioning shaft and the handle is a polygonal shaft pin, the second positioning shaft is provided with an annular limiting groove, and a reset member is provided at the annular limiting groove.

[0024] Specifically, the handle seat includes a seat body with a mounting cavity and a cover connected to one side of the seat body and covering the mounting cavity. The seat body is provided with a riveting boss, the cover is provided with a riveting hole that mates with the riveting boss, and the cover is provided with a second positioning hole for the polygonal shaft pin to pass through.

[0025] The top of the handle seat is arc-shaped, and the rotating connection part has an arc groove that slides and fits with the handle seat. A mounting wall is provided on one side of the arc groove, and the mounting wall is provided with a polygonal hole that mates with the polygonal shaft pin.

[0026] The present invention also provides an inward opening and tilt-and-turn window system, including an inward opening and tilt-and-turn window sash and the aforementioned handle device.

[0027] The handle device and inward opening and tilting window system provided by this invention can effectively prevent user misoperation and accidental opening, with good anti-misoperation effect and excellent user experience. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional exploded view of a handle device provided in Embodiment 1 of the present invention;

[0030] Figure 2 This is a cross-sectional schematic diagram of a handle device provided in Embodiment 1 of the present invention;

[0031] Figure 3 This is a cross-sectional schematic diagram of a handle device provided in Embodiment 1 of the present invention when one end is tilted up;

[0032] Figure 4 This is a cross-sectional schematic diagram of a handle device provided in Embodiment 1 of the present invention when balanced at both ends;

[0033] Figure 5 This is a cross-sectional schematic diagram of a handle device provided in Embodiment 1 of the present invention when the other end is tilted up;

[0034] Figure 6This is a three-dimensional schematic diagram of a handle device provided in Embodiment 2 of the present invention;

[0035] Figure 7 This is a three-dimensional exploded view of a handle device provided in Embodiment 2 of the present invention;

[0036] Figure 8 This is a three-dimensional exploded view of a handle device provided in Embodiment 2 of the present invention;

[0037] Figure 9 This is a plan view of a handle device provided in Embodiment 2 of the present invention in a balanced state when the left handle hook locking mechanism applies an upward force.

[0038] Figure 10 This is a plan view of the handle rotating to the right in a handle device provided in Embodiment 2 of the present invention;

[0039] Figure 11 This is a plan view of a handle device provided in Embodiment 2 of the present invention in a balanced state when the right handle hook locking mechanism applies an upward force.

[0040] Figure 12 This is a plan view of the handle rotating to the left in a handle device provided in Embodiment 2 of the present invention;

[0041] Figure 13 This is a three-dimensional schematic diagram of a handle hook locking mechanism in a handle device according to Embodiment 2 of the present invention;

[0042] Figure 14 This is a three-dimensional schematic diagram of the seat in a handle device provided in Embodiment 2 of the present invention. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0044] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures. Example 1:

[0045] This embodiment provides a handle device 40, such as Figures 1 to 5As shown, the handle device 40 includes a handle 41, a handle seat 42, a transmission component 43, and a transmission mechanism for driving the transmission component 43 to move. The handle 41 is rotatably connected to the handle seat 42. The transmission mechanism is connected to the handle seat 42 and is drively connected to the handle 41 and the transmission component 43. The handle 41 is connected to a hook-locking mechanism that can be hooked onto the handle seat 42 to lock the handle 41 and can be manually unlocked by the user. The hook-locking mechanism can effectively prevent user misoperation and accidental opening. The transmission component 43 can be a sliding fork or a rotating fork.

[0046] Specifically, the inner middle section of the handle 41 is connected to the handle seat 42 by a rocker-type pivot 411. The handle 41 has three positions: the upper end is tilted up, both ends are balanced, and the lower end is tilted up. When applied to inward-opening and tilt-and-turn doors and windows, it can correspond to three different window sash modes (tilt-and-turn, locked, and casement). The correspondence between the position of the handle 41 and the window sash mode can be determined according to the actual situation.

[0047] Specifically, the hook-and-loop locking mechanism has two sets located inside the handle 41 and on both sides of the pivot 411. The hook-and-loop locking mechanism includes a hook 44 rotatably connected to the handle 41 and an elastic element 441 abutting against the hook 44. The elastic element 441 can be a coil spring. One end of the hook 44 is the hook-and-loop end, and the other end is an unlocking lever that can be pressed by the user. The hook-and-loop end can be hooked onto the handle seat 42. The hook 44 can be in a "U" shape, etc., with the unlocking lever extending outwards. The hook 44 is rotatably connected to the handle seat 42 via the pivot 442, and the coil spring can be fitted onto the pivot 442. When one end of the hook 44 (the hook-and-loop end) is hooked onto the handle seat 42, the handle 41 can only maintain a balanced state at both ends. The user can press the unlocking lever of the hook 44, and the hook-and-loop end can then disengage from the handle seat 42.

[0048] Specifically, the handle seat 42 has inverted fastening portions on both sides. These inverted fastening portions can be inverted flanges 421 or inverted blocks, etc. The inverted flange 421 (inverted portion) near the handle 41 has a guide surface 422 for guiding the hook 44 to engage with the inverted flange 421 (inverted portion). When the user needs to lift the upper end of the handle 41, they only need to press the unlocking lever corresponding to the hook 44 on the inner side of the upper end of the handle 41, overcoming the elastic force of the elastic element 441, causing the corresponding hook end to disengage from the handle seat 42, and then pull the handle 41 outwards. This will lift the upper end of the handle 41. Figure 5 As shown. When it is necessary to reset the handle 41 to the balanced state, simply reverse the handle 41 to reset it. The hook end, under the action of the guide surface 422, is engaged inside the undercut flange 421 and held in a locked state by the elastic element 441, as shown. Figure 4As shown. Similarly, when the user needs to lift the lower end of the handle 41, simply press the unlocking lever of the corresponding hook 44 on the inner side of the lower end of the handle 41, causing the corresponding hook end to disengage from the handle seat 42, and pull the handle 41 outwards. This will lift the lower end of the handle 41. Figure 3 As shown, when it is necessary to reset the handle 41 to the balanced state, simply reset the handle 41 in the reverse direction. The hook end is locked inside the buckle flange 421 under the action of the guide surface 422 and is held in the locked state by the elastic element 441.

[0049] Specifically, the transmission mechanism includes a drive gear 45 connected to the handle 41 and rotating synchronously with the handle 41; a transmission component 43 slidably connected to the handle seat 42; and a rack 431 provided on the back of the transmission component 43, which can be a spur rack or a helical rack. The rack 431 meshes with the drive gear 45 through an intermediate gear 46. The transmission component 43 can be connected to a connector 47, with its upper and lower ends fixedly connected to the first side transmission rod 513 and the second side transmission rod 521, respectively.

[0050] The intermediate gear 46 includes a first gear 461 (large gear) and a second gear 462 (small gear) coaxially fixedly connected. Their sizes are relative; the diameter of the second gear 462 is smaller than that of the first gear 461 to make the structure more compact. The second gear 462 meshes with the driving gear 45, and the first gear 461 meshes with the rack 431. This allows the transmission component 43 to achieve a large linear displacement when the handle 41 rotates at a small angle, while maintaining a compact and reliable structure. Alternatively, the intermediate gear 46 can be a single, integrated driven gear.

[0051] The drive gear 45 can be fan-shaped or semi-circular. The handle base 42 has a mounting groove, which can be connected to a cover 48. The transmission mechanism can be disposed within the mounting groove of the handle base 42. There can be two drive gears 45, which can be coaxially spaced apart. There can be two intermediate gears 46, which are spaced apart along the sliding direction of the rack 431 and both mesh with the rack 431. The second gear 462 of the two intermediate gears 46 meshes with the drive gear 45. Alternatively, there can be one intermediate gear 46, which meshes with both the rack 431 and the drive gear 45.

[0052] In practical applications, the handle 41 can be a metal handle or a plastic handle, and its surface can be provided with anti-slip pads. In this embodiment, when the window sash is in the locked state and opened inward, simply press the unlocking lever of the corresponding hook 44 on the inner side of the lower end of the handle 41 to disengage the corresponding hook end from the handle seat 42, and pull the handle 41 outward to lift the lower end of the handle 41. Press the unlocking lever of the corresponding hook 44 on the inner side of the upper end of the handle 41 to overcome the elastic force of the elastic element 441, disengage the corresponding hook end from the handle seat 42, and pull the handle 41 outward to lift the upper end of the handle 41. Existing door and window handles on the market are all operated by rotating in a direction parallel to the plane of the door and window. This rotational action is a relatively strenuous operation for the human arm muscles, and most of them only have one handle, making operation inconvenient. In this embodiment, the handle 41 adopts a pull-type structure, which can be pulled in a direction perpendicular to the plane of the door and window. This method is more in line with the ergonomic principle. The force of the arm is along the direction of muscle contraction and extension. Users can directly and effectively use their own body weight inertia to operate the opening and closing of the door and window, making the operation more user-friendly.

[0053] This invention also provides an inward-opening and tilt-and-turn window system, including an inward-opening and tilt-and-turn window sash and the aforementioned handle device.

[0054] The inward-opening and tilt-and-turn door / window system provided in this embodiment of the invention features a handle 41 connected to a latch locking mechanism that can be hooked onto a handle seat 42 to lock the handle 41 and can be manually unlocked by the user. The latch locking mechanism effectively prevents user misoperation and accidental opening, offering excellent safety and reliability. Furthermore, the handle 41 adopts a pull-type structure, allowing the handle to be pulled perpendicular to the door / window plane. This method is more ergonomic, as the force applied to the arm follows the direction of muscle contraction and extension, allowing the user to directly and effectively utilize their own body weight inertia to operate the door / window opening and closing, making the operation more user-friendly. Example 2:

[0055] like Figures 6 to 14As shown in the figure, an embodiment of the present invention provides a handle device, including a handle base 10, a transmission component 40, a handle 20 rotatably connected to the handle base 10, and a hook-locking mechanism 30 rotatably connected to the handle 20 and confined within the handle base 10 to restrict the rotation of the handle 20. A transmission mechanism is provided between the handle 20 and the transmission component 40, which drives the transmission component 40 to move or rotate. When the handle 20 is in its initial state, the hook-locking mechanism 30 contacts the handle base 10, which can restrict the rotation of the handle 20. The hook-locking mechanism 30 can hook onto the handle base 10 to lock the handle 20 and can be manually unlocked by the user. If no force is applied to the handle hook-locking mechanism 30 in the unlocking direction, the handle 20 cannot move, and the transmission component 40 will also be unable to move. This state is a locked state, which has a good anti-misoperation effect. The unlocking direction of the handle hook-locking mechanism 30 can be the direction of lifting and pressing towards the handle 20, which facilitates user operation and improves the user experience.

[0056] In this embodiment, the hook locking mechanism 30 is located on the inner side of the handle 20. When the user holds the handle 20, he / she can naturally lift and press the corresponding hook locking mechanism 30.

[0057] Specifically, the handle 20 includes a rotating connecting part 23, a left handle part 21, and a right handle part 22. The left handle part 21 and the right handle part 22 can be used to control the transmission direction of the transmission component 40. The transmission component 40 can be a fork, which can be rotating or sliding. The rotating connecting part 23 is rotatably connected to the handle base 10. The left handle part 21 and the right handle part 22 are integrally connected to both sides of the rotating connecting part 23. Two hook locking mechanisms 30 are provided, one of which is located on the side of the left handle part 21 facing the handle base 10, and the other is located on the side of the right handle part 22 facing the handle base 10. The handle device can be used to control inward-opening and tilt-and-turn window sashes.

[0058] Specifically, the inner side of the handle 20 is provided with a movable groove 201 for accommodating the hook locking mechanism 30. A return spring 50 is provided between the hook locking mechanism 30 and the handle 20, and the rear end of the hook locking mechanism 30 protrudes from the movable groove 201. By pressing the hook locking mechanism 30, the user compresses the return spring 50 and rotates the hook locking mechanism 30 in the direction of entering the movable groove 201, thereby releasing the hook locking mechanism 30 from limiting the handle seat 10, allowing the handle 20 to rotate towards the other handle. The return spring 50 can be a coil spring. The inner side of the hook locking mechanism 30 is provided with a spring mounting groove 301. One end of the spring is engaged in the spring mounting groove 301, and the other end abuts against the movable groove 201, causing the hook locking mechanism 30 to abut against the handle seat 10 and prevent the handle 20 from rotating.

[0059] Specifically, the hook-and-lock mechanism 30 has a first limiting surface 31 that hooks onto or abuts against the handle seat 10 to restrict the rotation of the handle 20; the hook-and-lock mechanism 30 also has a second limiting surface 32 for limiting the rotation angle of the handle 20, the second limiting surface 32 being offset vertically and longitudinally from the first limiting surface 31. The second limiting surface 32 can be used to limit the rotation angle of the handle 20, providing better safety and reliability. A cushioning pad, such as a rubber pad, can be affixed to the second limiting surface 32 and the first limiting surface 31.

[0060] Specifically, the front end of the hook locking mechanism 30 has a limiting arm 320 and a limiting hook 310 integrally connected to the limiting arm 320 and protruding from the limiting arm 320. The first limiting surface 31 is disposed on the limiting hook 310, and the second limiting surface 32 is disposed on the limiting arm 320. Their positions and angles are offset.

[0061] Specifically, the transmission mechanism includes a driven tooth 610 and a driving tooth 620 that meshes with the driven tooth 610. The driven tooth 610 is integrally disposed on or connected to the transmission member 40, and the driving tooth 620 is connected to the handle 20. Both the driven tooth 610 and the driving tooth 620 can be fan-shaped, semi-circular, or circular.

[0062] Specifically, the handle seat 10 is provided with a first positioning hole 101, and the driven tooth 610 is rotatably connected to the first positioning hole 101 through a first positioning shaft; the upper end of the driven tooth 610 can be connected inside the handle seat 10, and the lower end of the driven tooth 610 is connected to the transmission member 40, which can be located outside the handle seat 10.

[0063] Specifically, the handle seat 10 is provided with a second positioning hole 102, and the active tooth 620 is rotatably connected to the second positioning hole 102 through a second positioning shaft 630. The second positioning shaft 630 is connected to the handle 20, and the active tooth 620 will rotate when the handle 20 is rotated.

[0064] Specifically, the driven tooth 610 has a clearance groove 611 on one side, and the driving tooth 620 extends into the clearance groove 611, resulting in a compact structure.

[0065] Specifically, the connection between the second positioning shaft 630 and the handle 20 is a polygonal pin. The second positioning shaft 630 is provided with an annular limiting groove 631, and a reset member 660 is provided at the annular limiting groove 631. The reset member 660 can be a coil spring, so that when the external force is removed, the handle 20 can automatically return to its initial state (balanced state, such as...). Figure 10 (As shown).

[0066] Specifically, the handle base 10 includes a base 110 with a mounting cavity and a cover 120 connected to one side of the base 110 and covering the mounting cavity. A driven tooth 610 and a driving tooth 620 can be disposed within the mounting cavity. The base 110 is provided with a riveting boss 111, and the cover 120 is provided with a riveting hole 103 that mates with the riveting boss 111. The cover 120 is also provided with a second positioning hole 102 for the polygonal shaft pin to pass through, facilitating installation. The base 110 is provided with a mounting hole 112 to fix the handle device to the window sash.

[0067] The top of the handle seat 10 is arc-shaped, and the rotating connection part 23 has an arc groove that slides and fits with the handle seat 10. A mounting wall 24 is provided on one side of the arc groove, and the mounting wall 24 is provided with a polygonal hole 241 that mates with the polygonal shaft pin.

[0068] like Figure 9 As shown, when the handle 20 is in a balanced state, and the first limiting surfaces 31 of both the left and right handle hook locking mechanisms 30 are in contact with the boss limiting surface 109 of the handle seat 10, the transmission fork cannot move unless an upward force is applied to either handle hook locking mechanism 30. This state is a locked state and is used for the design to prevent misoperation.

[0069] like Figure 10As shown, when the left handle hook locking mechanism 30 applies an upward force, the return spring 50 tightens, the first limiting surface 31 separates from the boss limiting surface 109 of the handle seat 10, creating a travel gap. The handle 20 can then tilt to the right, and simultaneously the polygonal shaft pin of the drive wheel rotates to the right. Because the drive wheel and driven wheel mesh with each other, the transmission fork rotates to the left. After rotating a certain distance, the second limiting surface 32 contacts the boss limiting surface 109 of the handle seat 10, and the travel ends. This state achieves the switching effect. When the handle hook locking mechanism 30 is released, the handle hook locking mechanism 30 and the handle 20 automatically reset, and the handle device returns to a balanced state.

[0070] like Figure 11 As shown, when an upward force is applied to the right handle hook locking mechanism 30, the corresponding return spring 50 tightens, the first limiting surface 31 separates from the boss limiting surface 109 of the handle seat 10, creating a travel clearance, as... Figure 12 As shown, the handle 20 can tilt to the left, and at the same time the polygonal shaft pin of the drive wheel rotates to the left. Since the drive wheel and the driven wheel mesh with each other, the transmission fork rotates to the right. After a certain stroke, the stroke ends due to the contact between the second limiting surface 32 and the boss limiting surface 109 of the handle seat 10. This state can achieve the switching effect.

[0071] This invention also provides an inward-opening and tilt-and-turn window system, including an inward-opening and tilt-and-turn window sash and the aforementioned handle device. The handle operating component can be pulled perpendicular to the window / door plane, which is more ergonomic. The force applied to the arm is along the direction of muscle contraction and extension, allowing the user to directly and effectively utilize their own body weight inertia to operate the opening and closing of the window / door. This makes the operation more user-friendly. Furthermore, by setting a hook-locking mechanism, the rotation of the handle operating component can be restricted. If no unlocking force is applied to the handle hook-locking mechanism, the handle 20 cannot move, and the transmission component 40 will also be unable to move. This state is a locked state, providing good protection against accidental operation.

[0072] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A handle device, characterized in that, It includes a handle, a handle base, a transmission component, and a transmission mechanism for driving the transmission component to move or rotate. The handle is rotatably connected to the handle base, and the transmission mechanism is connected to the handle base and is also drively connected to the handle and the transmission component. The handle is connected to a hook-locking mechanism that can be hooked onto the handle base to lock the handle and can be manually unlocked by the user. The transmission mechanism includes a drive gear connected to the handle and rotating synchronously with the handle; the transmission component is slidably connected to the handle seat; a rack is provided on the back of the transmission component; and the rack meshes with the drive gear. Alternatively, the transmission mechanism includes a driven tooth and a driving tooth that meshes with the driven tooth, the driven tooth being disposed on the transmission member and the driving tooth being connected to the handle; The inner middle section of the handle is rotatably connected to the handle seat; the hook locking mechanism is located on the inner side of the handle; The handle has three action states: the upper end is tilted up, both ends are balanced, and the lower end is tilted up. These three action states correspond to the three window sash modes: tilting inward, locking, and opening.

2. The handle device as described in claim 1, characterized in that, The hook locking mechanism includes a hook rotatably connected to the handle and an elastic element abutting against the hook. One end of the hook is a hook end that can be hooked onto the handle seat, and the other end is an unlocking lever that can be pressed by the user. The handle seat has a snap-down portion on both sides, and the snap-down portion has a guide surface on the side of the snap-down portion closer to the handle for guiding the hook to snap onto the snap-down portion; It also includes an intermediate gear, through which the rack meshes with the drive gear; The intermediate gear includes a first gear and a second gear fixedly connected coaxially, the second gear meshing with the driving gear and the first gear meshing with the rack; or, the intermediate gear is a driven gear. The drive gear is fan-shaped or semi-circular; The handle seat has a mounting groove, the mounting groove is connected to a cover, and the transmission mechanism is disposed in the mounting groove.

3. A handle device as described in claim 2, characterized in that, The drive gear is provided in two ways, and the two drive gears are coaxially spaced apart. The intermediate gear is provided in two ways, and the two intermediate gears are spaced apart along the sliding direction of the rack and both mesh with the rack. The second gear of the two intermediate gears meshes with the drive gear; or, there is one intermediate gear.

4. A handle device as described in claim 1, characterized in that, The handle includes a rotating connecting part, a left handle part, and a right handle part. The rotating connecting part is rotatably connected to the handle base. The left handle part and the right handle part are respectively connected to both sides of the rotating connecting part. There are two hook locking mechanisms, one of which is located on the side of the left handle part facing the handle base, and the other is located on the side of the right handle part facing the handle base. The inner side of the handle is provided with a movable groove for accommodating the hook locking mechanism, and a return spring is provided between the hook locking mechanism and the handle. The rear end of the hook locking mechanism protrudes from the movable groove. The hook-and-lock mechanism has a first limiting surface that hooks onto or abuts against the handle seat to restrict the rotation of the handle; the hook-and-lock mechanism also has a second limiting surface for restricting the rotation angle of the handle, the second limiting surface being offset vertically and horizontally from the first limiting surface; The front end of the hook locking mechanism has a limiting arm and a limiting hook integrally connected to the limiting arm and protruding from the limiting arm. The first limiting surface is disposed on the limiting hook, and the second limiting surface is disposed on the limiting arm.

5. A handle device as described in claim 4, characterized in that, The driven gear is integrally disposed on or connected to the transmission component.

6. A handle device as described in claim 5, characterized in that, The handle seat is provided with a first positioning hole and also includes a first positioning shaft, and the driven tooth is rotatably connected to the first positioning hole through the first positioning shaft; The handle seat is provided with a second positioning hole and also includes a second positioning shaft. The drive gear is rotatably connected to the second positioning hole through the second positioning shaft. The driven tooth has a recessed groove on one side, and the driving tooth extends into the recessed groove.

7. A handle device as described in claim 6, characterized in that, The connection between the second positioning shaft and the handle is a polygonal shaft pin. The second positioning shaft is provided with an annular limiting groove, and a reset component is provided at the annular limiting groove.

8. A handle device as described in claim 7, characterized in that, The handle seat includes a seat body with a mounting cavity and a cover connected to one side of the seat body and covering the mounting cavity. The seat body is provided with a riveting boss, the cover is provided with a riveting hole that mates with the riveting boss, and the cover is provided with a second positioning hole for the polygonal shaft pin to pass through. The top of the handle seat is arc-shaped, and the rotating connection part has an arc groove that slides and fits with the handle seat. A mounting wall is provided on one side of the arc groove, and the mounting wall is provided with a polygonal hole that mates with the polygonal shaft pin.

9. An inward-opening and tilt-and-turn window system, characterized in that, It includes an inward-opening and tilt-and-turn window sash and a handle device as described in any one of claims 1 to 8.

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