A manual switch mechanism for a casement window

Abstract

A manual switch mechanism for a casement window belongs to the technical field of casement windows. The present invention aims to solve the problems of complex structure and high cost of casement window openers. It includes a mounting frame and an opening and closing arm. A fixed wheel is provided on the mounting frame, and moving wheels are respectively provided at both ends of the opening and closing arm. One end of the opening and closing arm is connected to the window sash. The control chain is engaged with the outer circumference of the fixed wheel. One end of the control chain goes upward from the side of the fixed wheel close to the window sash, bypasses the moving wheel away from the window sash and is connected to the mounting frame. The other end of the control chain goes upward from the side of the fixed wheel away from the window sash, bypasses the moving wheel close to the window sash and is connected to the mounting frame. The control chain redundant part at the bottom of the fixed wheel droops downward. By pulling the redundant drooping part, the window can be opened and closed through this mechanism. This mechanism has the characteristics of simple structure, low manufacturing cost, convenient installation, easy operation, safety and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of casement windows, and particularly relates to a manual switch mechanism for casement windows. Background Art

[0002] In existing buildings with high ceilings such as warehouses, factories, and entertainment halls, in order to meet the needs of ventilation or lighting, casement windows are installed at high positions on the walls. Most residential houses with floor-to-ceiling windows also have high-position casement windows. Since the installation positions of casement windows are generally high and out of reach of human hands, it is difficult to open and close them. Therefore, window openers are required.

[0003] A window opener is a machine used to open and close windows. There are many existing types of window openers, which can be roughly divided into several categories such as chain type, folding arm type, and hand crank type. The chain type window opener and the folding arm type window opener are electrically controlled. Although the operation is simple, they cannot work properly when power is lost. The hand crank type window opener controls the rotation of the top machine shaft by driving a screw lifter through a handwheel, and then controls the opening and closing of the casement window. The operation is relatively cumbersome, and many components are exposed, which is extremely unsightly.

[0004] Whether it is an electric window opener or a manual window opener, they both have the disadvantages of complex structure and high cost. Summary of the Invention

[0005] The purpose of the invention is to provide a manual switch mechanism for casement windows to solve the problems of complex structure and high cost of casement window openers. The technical solution adopted by the invention is as follows:

[0006] A manual switch mechanism for a window sash includes a mounting bracket and an opening and closing arm. A fixed wheel is arranged on the mounting bracket. Moving wheels are respectively arranged at both ends of the opening and closing arm. One end of the opening and closing arm is connected to the window sash. A control chain is engaged with the outer circumference of the fixed wheel. One end of the control chain goes up from the side of the fixed wheel close to the window sash, bypasses the moving wheel away from the window sash and is connected to the mounting bracket. The other end of the control chain goes up from the side of the fixed wheel away from the window sash, bypasses the moving wheel close to the window sash and is connected to the mounting bracket. The redundant part of the control chain at the bottom of the fixed wheel hangs down.

[0007] Further, the fixed wheel is a bead wheel with double bead grooves, the control chain is a bead rope, one end of the control chain is engaged with any one of the bead grooves of the fixed wheel, and the other end of the control chain is engaged with the other bead groove of the fixed wheel; or, the fixed wheel is a sprocket with double rows of teeth, the control chain is a chain, one end of the control chain is engaged with any one of the teeth of the fixed wheel, and the other end of the control chain is engaged with the other tooth of the fixed wheel.

[0008] Further, two wire clamping discs are arranged on the mounting bracket. A counterbore is arranged on one end face of the wire clamping disc. A wire threading groove is arranged on the side wall of the counterbore. Both ends of the control chain are respectively clamped at both ends of two adjacent wire threading grooves through the thick parts of two adjacent chain links in a one-to-one correspondence.

[0009] Further, two limiting wheel assemblies are provided on the mounting frame. Each limiting wheel assembly includes a first bolt shaft and a limiting sleeve. The limiting sleeve is rotatably arranged on the first bolt shaft through a bearing. The first bolt shaft is threadedly connected to the mounting frame. The opening and closing arm is an arc-shaped rod. The inner peripheral surface and the outer peripheral surface of the opening and closing arm respectively abut against the outer peripheral surfaces of the two limiting sleeves in a one-to-one correspondence. When the upper end of the window sash is the opening and closing end, the inner peripheral surface of the opening and closing arm is arranged downward. When the lower end of the window sash is the opening and closing end, the inner peripheral surface of the opening and closing arm is arranged upward.

[0010] Further, the mounting frame includes a main mounting frame and a sub-mounting frame. The main mounting frame is connected to the window frame. The sub-mounting frame and the main mounting frame sandwich both sides of the two limiting wheel assemblies, the fixed wheel and the opening and closing arm.

[0011] Further, the fixed wheel is rotatably arranged on the fixed wheel shaft through a bearing. The two ends of the fixed wheel shaft are respectively connected to the main mounting frame and the sub-mounting frame in a mating manner.

[0012] Further, an annular groove coaxial with it is provided on the end face of the fixed wheel close to the sub-mounting frame. The bottom surface of the annular groove is an arc-shaped surface. A plurality of spherical pits are evenly arranged along the annular groove. A positioning hole is provided on the sub-mounting frame, and a positioning component is arranged in the positioning hole.

[0013] When the control chain is pulled, the positioning component is in sliding fit with the annular groove.

[0014] When the pulling of the control chain stops, the positioning component abuts against any one of the spherical pits in a mating manner.

[0015] Further, the positioning component includes a flat-end set screw and a positioning post. One end of the positioning hole close to the fixed wheel is a smooth hole, and the other end of the positioning hole far from the fixed wheel is a threaded hole. The positioning post is slidably arranged in the smooth hole. The flat-end set screw is in threaded fit with the threaded hole. A spring is connected between the flat-end set screw and the positioning post. One end of the positioning post close to the fixed wheel is a ball head, and the ball head is in fit with the annular groove or any one of the spherical pits.

[0016] Further, the depth of the spherical pit is greater than the depth of the annular groove.

[0017] Further, the moving wheel is rotatably arranged on the second bolt shaft through a bearing. The outer periphery of the moving wheel is in fit with the control chain. The second bolt shaft is threadedly connected to the opening and closing arm.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The opening and closing device moves in an arc between the first limit wheel assembly and the second limit wheel assembly, that is, the opening and closing device always applies a force to the window sash in a direction perpendicular to the window sash. When opening the window, pull the redundant pull cord below the pull bead wheel towards the side of the casement window. The first guide wheel is subjected to the pulling force of the pull cord, and then the opening and closing device moves in an arc towards the window sash side between the first limit wheel assembly and the second limit wheel assembly, and the window sash can be opened; when closing the window, pull the redundant pull cord below the pull bead wheel away from the side of the casement window. The second guide wheel is subjected to the pulling force of the pull cord, and then the opening and closing device moves in an arc towards the side away from the window sash between the first limit wheel assembly and the second limit wheel assembly, and the window sash can be closed. The pull cord located below the pull bead wheel is redundantly drooping. When the height of the casement window is out of reach of human hands, the window can be opened and closed through this mechanism. This mechanism has the characteristics of simple structure, low manufacturing cost, convenient installation, easy operation, safety and reliability. Brief Description of the Drawings

[0020] Figure 1 is the front view of the present invention;

[0021] Figure 2 is the exploded view of the present invention;

[0022] Figure 3 is the axonometric view of the present invention without the pull cord;

[0023] Figure 4 is the axonometric view of the present invention in another direction without the pull cord;

[0024] Figure 5 is the assembly drawing of the limit wheel;

[0025] Figure 6 is the axonometric view of the wire clamping disc;

[0026] Figure 7 is the assembly drawing of the pull bead wheel;

[0027] Figure 8 is the assembly drawing of the pull bead wheel, positioning column and flat end top screw;

[0028] Figure 9 is the axonometric view of the pull bead wheel;

[0029] Figure 10 is the assembly drawing of the guide wheel;

[0030] Figure 11 is the schematic diagram of the cooperation between the first limit wheel, the second limit wheel, the pull bead wheel and the auxiliary mounting bracket;

[0031] Figure 12 is the front view of the installation of the present invention and the casement window;

[0032] Figure 13 is the left view of the installation of the present invention and the casement window;

[0033] Figure 14 It is the top view of the installation of the present invention and the casement window;

[0034] Figure 15 It is the front view of the present invention for the bottom-hung window;

[0035] In the figure: 1 - mounting bracket, 11 - main mounting bracket, 12 - sub-mounting bracket, 13 - wire clamping disc, 131 - wire threading groove, 2 - fixed wheel, 21 - fixed wheel shaft, 22 - positioning post, 221 - ball head, 23 - flat end set screw, 24 - spring, 25 - annular groove, 26 - spherical concave pit, 3 - opening and closing arm, 4 - moving wheel, 41 - second bolt shaft, 5 - control chain, 6 - limit sleeve, 61 - first bolt shaft, 71 - window frame, 72 - window sash. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0037] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection is an inseparable connection, including but not limited to conventional fixed connection methods such as flanging connection, rivet connection, bonding connection and welding connection. The detachable connection includes but not limited to conventional disassembly methods such as bolt connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is default that at least one connection method can be found among the existing connection methods to achieve this function, and those skilled in the art can select according to their needs. For example: welding connection is selected for the fixed connection, and bolt connection is selected for the detachable connection.

[0038] The present invention will be further described in detail below with reference to the drawings. The following embodiments are explanations of the present invention, and the present invention is not limited to the following embodiments.

[0039] Embodiment: As shown in the figure, a manual switch mechanism for a casement window includes a mounting bracket 1 and an opening and closing arm 3. A fixed wheel 2 is provided on the mounting bracket 1. Moving wheels 4 are respectively provided at both ends of the opening and closing arm 3. One end of the opening and closing arm 3 is connected to the window sash 72. One end of the control chain 5 goes upward from the side of the fixed wheel 2 close to the window sash 72, bypasses the moving wheel 4 away from the window sash 72 and is connected to the mounting bracket 1. The other end of the control chain 5 goes upward from the side of the fixed wheel 2 away from the window sash 72, bypasses the moving wheel 4 close to the window sash 72 and is connected to the mounting bracket 1. The redundant part of the control chain 5 at the bottom of the fixed wheel 2 droops.

[0040] A casement window is a window that opens and closes by rotating around a horizontal hinge. Depending on the position of the hinge, it is divided into top-hung windows, center-hung windows, and bottom-hung windows. The window sash 72 refers to the part within the casement window frame 71 that can be opened and closed. One end of the opening and closing arm 3 is connected to the window sash 72, and the mounting bracket 1 is connected to the window frame 71. The opening and closing arm 3 rotates along the hinge axis of the window sash 72 as the window sash 72 rotates, that is, the opening and closing arm 3 always applies a force to the window sash 72 in a direction perpendicular to the window sash 72. When opening the window, pull the redundant control chain 5 below the pull bead wheel 2 towards the side of the casement window. The moving wheel 4 away from the casement window is pulled by the control chain 5, and then the opening and closing arm 3 makes an arc movement towards the window sash 72 side, and the window sash 72 can be opened; when closing the window, pull the redundant control chain 5 below the fixed wheel 2 towards the side away from the casement window. The moving wheel 4 close to the casement window is pulled by the control chain 5, and then the opening and closing arm 3 makes an arc movement towards the side away from the window sash 72, and the window sash 72 can be closed. The control chain 5 below the fixed wheel 2 is redundantly drooping. In the case where the height of the casement window is out of reach of a person's hand, the window can be opened and closed through this mechanism. This mechanism has the characteristics of simple structure, low manufacturing cost, convenient installation, easy operation, and safety and reliability.

[0041] The fixed wheel 2 is a pull bead wheel with double-row bead grooves, and the control chain 5 is a pull bead rope. One end of the control chain 5 is engaged with any bead groove of the fixed wheel 2, and the other end of the control chain 5 is engaged with the other bead groove of the fixed wheel 2; alternatively, the fixed wheel 2 is a sprocket with double-row teeth, and the control chain 5 is a chain. One end of the control chain 5 is engaged with any tooth of the fixed wheel 2, and the other end of the control chain 5 is engaged with the other tooth of the fixed wheel 2.

[0042] The fixed wheel 2 is selected as a pull bead wheel with double-row bead grooves, and the control chain 5 is selected as a pull bead rope, which is convenient for the control chain 5 and the fixed wheel 2 to cooperate and not separate, and then it can ensure that the control chain 5 and the moving wheel 4 cooperate and do not separate, and it is also convenient to pull.

[0043] There are two wire clamping discs 13 on the mounting bracket 1. There is a counterbore on one end face of the wire clamping disc 13, and a wire passing groove 131 is provided on the side wall of the counterbore. The two ends of the control chain 5 are respectively clamped at both ends of the two wire passing grooves 131 by the thick parts of adjacent two pull beads or chain links. It is convenient for installation.

[0044] There are two limit wheel assemblies on the mounting bracket 1. The limit wheel assembly includes a first bolt shaft 61 and a limit sleeve 6. The limit sleeve 6 is rotatably arranged on the first bolt shaft 61 through a bearing. The first bolt shaft 61 is threadedly connected to the mounting bracket 1. The opening and closing arm 3 is a rod body in an arc shape. The inner peripheral surface and the outer peripheral surface of the opening and closing arm 3 respectively abut against the outer peripheral surfaces of the two limit sleeves 6 in a one-to-one correspondence. When the upper end of the window sash 72 is the opening end, the inner peripheral surface of the opening and closing arm 3 is arranged downward. When the window sash 72 is the opening end, the inner peripheral surface of the opening and closing arm 3 is arranged upward. When the opening and closing arm 3 makes an arc movement, the limit sleeve 6 can rotate in cooperation to reduce friction.

[0045] The mounting bracket 1 includes a main mounting bracket 11 and a sub-mounting bracket 12. The main mounting bracket 11 is connected to the window frame 71, and the main mounting bracket 11 and the sub-mounting bracket 12 clamp on both sides of the two limiting wheel assemblies, the fixed wheel 2, and the opening and closing arm 3.

[0046] There is an installation space between the main mounting bracket 11 and the sub-mounting bracket 12, providing an installation basis for the first limiting wheel assembly, the second limiting wheel assembly, and the fixed wheel 2. The main mounting bracket 11 and the sub-mounting bracket 12 are detachably connected by bolts, facilitating the installation of the first limiting wheel assembly, the second limiting wheel assembly, and the fixed wheel 2 on the main mounting bracket 11 first, and then connecting the sub-mounting bracket 12 to the main mounting bracket 11. On both sides of the bottom of the sub-mounting bracket 12, there are protrusions, and each of the two protrusions is provided with an arc surface that matches the outer circumference of the fixed wheel 2, for preventing the control chain 5 from disengaging from the bead groove of the fixed wheel 2.

[0047] The fixed wheel 2 is rotatably arranged on the fixed wheel shaft 21 through a bearing, and both ends of the fixed wheel shaft 21 are respectively connected to the main mounting bracket 11 and the sub-mounting bracket 12 in a matching manner.

[0048] The fixed wheel shaft 21 is connected to the main mounting bracket 11 by screws to fix the fixed wheel shaft 21. The control chain 5 is arranged in the bead groove of the fixed wheel 2. When pulling the control chain 5, the fixed wheel 2 rotates through the bearing, and when one end of the control chain 5 on both sides of the fixed wheel 2 is pulled downward, the other end moves upward synchronously. [[ID=J1]]

[0049] On the end face of the fixed wheel 2 close to the sub-mounting bracket 12, there is a coaxial annular groove 25. The bottom surface of the annular groove 25 is an arc surface, and a number of spherical pits 26 are evenly distributed along the annular groove 25. The depth of the spherical pits 26 is greater than the depth of the annular groove 25. There is a positioning hole on the sub-mounting bracket 12. The end of the positioning hole close to the fixed wheel is a smooth hole, and the end of the positioning hole far from the fixed wheel 2 is a threaded hole. The positioning post 22 is slidably arranged in the smooth hole, and the flat-end set screw 23 is threadedly engaged with the threaded hole. The flat-end set screw 23 and the positioning post 22 are connected by a spring 24. The end of the positioning post 22 close to the fixed wheel 2 is a ball head 221.

[0050] When pulling the control chain 5, the ball head 221 slides in cooperation with the annular groove 25.

[0051] When the control chain 5 stops being pulled, the ball head 221 abuts and cooperates with any one of the spherical pits 26.

[0052] When the ball head 221 abuts and mates with any spherical pit 26, the positioning post 22 is under the elastic force of the spring 24, making it difficult for the ball head 221 to disengage from the spherical pit 26, which is used to stop the fixed wheel 2. When the control chain 5 is pulled, the fixed wheel 2 rotates, and the ball head 221 slides and mates with the annular groove 25. The setting of the annular groove 25 can reduce the friction of the positioning post 22 on the fixed wheel 2. By adjusting the relative position of the flat end set screw 23 and the screw hole, the pre-tightening force of the spring 24 can be adjusted, and thus the pressure of the positioning post 22 on the spherical pit 26 can be adjusted. When the pre-tightening force of the spring 24 is adjusted low, the fixed wheel 2 is more likely to rotate against the pressure of the positioning post 22.

[0053] The moving wheel 4 is rotatably arranged on the second bolt shaft 41 through a bearing. The outer periphery of the moving wheel 4 cooperates with the control chain 5, and the second bolt shaft 41 is threadedly connected to the opening and closing arm 3. The nut flange surface of the second bolt shaft 41 and the boss on the opening and closing arm 3 respectively abut against both ends of the inner ring of the bearing of the moving wheel 4. The moving wheel 4 is sleeved on the outer ring of the bearing, so that when the control chain 5 is pulled, the moving wheel 4 can rotate cooperatively to reduce friction.

[0054] The above embodiments are only illustrative of this patent and do not limit its protection scope. Those skilled in the art can also make partial changes to it. As long as they do not exceed the spirit of this patent, they are within the protection scope of this patent.

Claims

1. A manual switch mechanism for a casement window, characterized in that: It includes a mounting bracket (1) and an opening / closing arm (3). A fixed wheel (2) is provided on the mounting bracket (1). Moving wheels (4) are respectively provided at both ends of the opening / closing arm (3). One end of the opening / closing arm (3) is connected to a window sash (72). One end of a control chain (5) goes upward from the side of the fixed wheel (2) close to the window sash (72), bypasses the moving wheel (4) away from the window sash (72) and is connected to the mounting bracket (1). The other end of the control chain (5) goes upward from the side of the fixed wheel (2) away from the window sash (72), bypasses the moving wheel (4) close to the window sash (72) and is connected to the mounting bracket (1). The control chain (5) at the bottom of the fixed wheel (2) redundantly droops. The fixed wheel (2) is a bead wheel with double rows of bead grooves, and the control chain (5) is a bead rope. One end of the control chain (5) is engaged with any one of the bead grooves of the fixed wheel (2), and the other end of the control chain (5) is engaged with the other bead groove of the fixed wheel (2); or, the fixed wheel (2) is a sprocket wheel with double rows of teeth, the control chain (5) is a chain, one end of the control chain (5) is engaged with any one of the teeth of the fixed wheel (2), and the other end of the control chain (5) is engaged with the other tooth of the fixed wheel (2). Two limit wheel assemblies are provided on the mounting bracket (1). The limit wheel assembly includes a first bolt shaft (61) and a limit sleeve (6). The limit sleeve (6) is rotatably arranged on the first bolt shaft (61) through a bearing. The first bolt shaft (61) is threadedly connected to the mounting bracket (1). The opening / closing arm (3) is an arc-shaped rod body. The inner peripheral surface and the outer peripheral surface of the opening / closing arm (3) respectively abut against the outer peripheral surfaces of the two limit sleeves (6) in a one-to-one correspondence. When the upper end of the window sash (72) is the opening / closing end, the inner peripheral surface of the opening / closing arm (3) is downward. When the lower end of the window sash (72) is the opening / closing end, the inner peripheral surface of the opening / closing arm (3) is upward.

2. The manual switch mechanism for a casement window according to claim 1, characterized in that: Two wire clamping discs (13) are provided on the mounting bracket (1). A sunk platform is provided on one end face of the wire clamping disc (13). A wire passing groove (131) is provided on the side wall of the sunk platform. The two ends of the control chain (5) are respectively clamped at both ends of the two wire passing grooves (131) through the thick parts of adjacent beads or chain links in a one-to-one correspondence.

3. The manual switch mechanism for a casement window according to claim 1, characterized in that: The mounting bracket (1) includes a main mounting bracket (11) and a sub-mounting bracket (12). The main mounting bracket (11) is connected to a window frame (71). The sub-mounting bracket (12) and the main mounting bracket (11) sandwich both sides of the two limit wheel assemblies, the fixed wheel (2) and the opening / closing arm (3).

4. The manual switch mechanism for a casement window according to claim 3, characterized in that: The fixed wheel (2) is rotatably arranged on a fixed wheel shaft (21) through a bearing. The two ends of the fixed wheel shaft (21) are respectively connected and matched with the main mounting bracket (11) and the sub-mounting bracket (12).

5. A manual switch mechanism for a casement window according to claim 4, characterized in that: An annular groove (25) coaxial with it is provided on the end face of the fixed wheel (2) close to the sub-mounting bracket (12). The bottom surface of the annular groove (25) is an arc surface. A plurality of spherical pits (26) are evenly arranged along the annular groove (25). A positioning hole is provided on the sub-mounting bracket (12), and a positioning component is arranged in the positioning hole. When the control chain (5) is pulled, the positioning component is in sliding fit with the annular groove (25). When the control chain (5) stops being pulled, the positioning component abuts and cooperates with any one of the spherical pits (26).

6. A manual switch mechanism for a casement window according to claim 5, characterized in that: The positioning component includes a flat-end set screw (23) and a positioning post (22). One end of the positioning hole close to the fixed wheel (2) is a smooth hole, and the end of the positioning hole far from the fixed wheel (2) is a threaded hole. The positioning post (22) is slidably arranged in the smooth hole, the flat-end set screw (23) is in threaded fit with the threaded hole, and the flat-end set screw (23) and the positioning post (22) are connected by a spring (24). One end of the positioning post (22) close to the fixed wheel (2) is a ball head (221), and the ball head (221) is matched with the annular groove (25) or any spherical pit (26).

7. A manual switch mechanism for a casement window according to claim 5, characterized in that: The depth of the spherical pit (26) is greater than the depth of the annular groove (25).

8. A manual switch mechanism for a casement window according to any one of claims 1-7, characterized in that: The moving wheel (4) is rotatably arranged on the second bolt shaft (41) through a bearing. The outer periphery of the moving wheel (4) is matched with the control chain (5), and the second bolt shaft (41) is in threaded connection with the opening and closing arm (3).

Images