Window locking device

Abstract

To provide a window locking device which can be attached to an existing double sliding window or a single sliding window, which has a simple constitution and is inexpensive, and which enables reliable locking, unlocking, and holding of the unlocking by simple operation.SOLUTION: A window locking device is provided with a locking mechanism (10) mounted in a case body (15), and a receiving fitting provided to a window frame, wherein the locking mechanism (10) is provided with a crank-shaped operating rod (40) having an engaging rod (11), an operating handle (42), a pivot shaft (41), and a compression coil spring (43) provided between the case body (15) and an upper portion (48) of the operating rod (40), and the operating rod (40) is rotated against the biasing force of the spring (43) about a bent portion (51) of the operating rod (40) and an abutting portion (52) of an outer wall (18) of the case body (15). The engaging rod 11 is pulled in the inside direction of the case body 15, and pulled out from the receiving tool of the window frame to be unlocked, and a grip part 58 of the operation handle 42 is locked to a locking hole 38 formed in the case lid body 16 to hold the unlocked state.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a window lock device for preventing children from falling out of a sliding window, which prevents the child from accidentally opening the window and leaning out of the window to fall out. [Background technology]

[0002] In recent years, there have been many tragic accidents in which young children have unlocked windows and doors in apartment buildings, opened them on their own, and climbed out of the windows and fallen.

[0003] Crescent locks, which are configured to engage a crescent-shaped rotating latch with a receiving bracket attached to the inner surface of a sliding window frame, are well known as a means for locking windows.

[0004] In a known crescent lock, the receiving fitting is strip-shaped and has two locking claws spaced apart along the length, and this receiving fitting is attached to the vertical frame of the outer window sash and extends from the vertical sash frame of the outer window sash along the inside of the window glass (see Patent Document 1).

[0005] In Patent Application No. 2023-144102, the inventor proposed a window locking device as a prior invention to the present invention, which can be attached to existing sliding windows or single sliding windows, has a simple and inexpensive structure, and can be securely locked with simple operation. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 10-331501 Summary of the Invention [Problem to be solved by the invention]

[0007] Crescent locks, which are well known in the art, are effective to a certain extent as a means for locking sliding windows to prevent small children from opening them without permission.

[0008] However, young children are more creative and have the ability to think creatively than adults think, so it is necessary to assume that they may use a chair or other object in the room to reach into the crescent lock, operate it, and unlock it.

[0009] Therefore, even if a crescent lock is installed on a sliding window, a device to lock the sliding window is still required. For this reason, an auxiliary crescent lock may be installed, but it is meaningless if the same configuration is used.

[0010] A locking device that can be installed as an auxiliary measure to prevent small children from opening sliding windows without permission must meet at least the following requirements: (1) The locking device can be easily and securely installed in a location where it cannot be reached even when a child is using a chair or the like. (2) As an auxiliary locking device, it has a simple structure, can be easily manufactured, and can be provided and obtained at a low cost. (3) The structure allows anyone to easily fold and install the door on an existing sliding door. (4) It is designed to be easy to operate for users other than small children and to be automatically locked.

[0011] Incidentally, the conventional crescent lock shown in Patent Document 1 has a belt-shaped receiving fitting and is configured with two latching claws spaced apart in the longitudinal direction, which allows the degree to which the sliding door is opened and maintained to be adjusted, but it is basically just an improvement over the conventional crescent lock.

[0012] Since the band-shaped receiving bracket is configured to extend from the vertical sash frame portion of the outer window sash so as to follow the inside of the glass of the outer window sash, the following issues remain. (1) The band-shaped brackets were attached to the inside of the glass of the outer window sash, which made it look unattractive from inside the room. (2) If the band-shaped receiving bracket is installed on the inside of the glass of the outer window sash, it will be installed at a low position, so there is a possibility that a small child may use a chair or other object to grab it and release it. (3) A configuration in which the receiving bracket is fixed to the vertical sash frame of the outer window sash is not necessarily preferable in terms of the strength of the receiving bracket itself and its attachment.

[0013] The prior invention proposed in the above-mentioned Japanese Patent Application No. 2023-144102 solves the above-mentioned problems, and the present inventors have conducted extensive research and development to improve the configuration of this prior invention, simplify the structure, reduce the number of failures, reduce the number of parts, and create a configuration that can be manufactured and sold inexpensively. As a result, they have arrived at the present invention.

[0014] The present invention is an improved invention of the inventor's prior invention, and aims to solve the above-mentioned conventional problems and to realize a window lock device with a simple structure that can be easily attached to windows of buildings such as apartment buildings in a position out of reach of small children, and in particular, that can be manufactured and provided at low cost by minimizing the number of parts. [Means for solving the problem]

[0015] In order to solve the above problems, the present invention provides a window lock device for locking a window, which is attached to one window frame of an openable window, and which is equipped with a lock mechanism that is attached inside a case and has an engaging rod, and a receiving bracket that is attached to the other window frame and to which the engaging rod can be engaged and disengaged, and the lock mechanism is equipped with an operating rod, an operating handle for operating the operating rod, and a spring, and the operating rod is integrally formed into a crank shape from an upper part, a horizontal part, and a lower part, and the upper and lower parts are provided so as to follow the inner surfaces of the outer wall and inner wall of the case, respectively, and the upper part has a spring that protrudes outward a spring provided between the upper part of the operating rod and the inner wall of the case, which is a member that urges the operating rod toward the inner surface of the outer wall; an operating handle that is pivotally supported on the lower part of the operating rod so as to be rotatable in the vertical direction and is provided so as to extend downward from the case; and by moving the operating handle toward the outer wall of the case, the operating rod is rotated against the urging force of the spring, centering on the contact part between the bent part from the upper part of the operating rod to the horizontal part and the inner surface of the outer wall of the case, thereby pulling the engaging rod toward the case and unlocking the window.

[0016] In order to solve the above problems, the present invention provides a window lock device for locking a window, which is attached to one window frame of an openable window, and which comprises a lock mechanism fitted inside the case and having an engaging rod, and a receiving bracket attached to the other window frame to which the engaging rod can be engaged and disengaged, the lock mechanism comprising an operating rod, an operating handle for operating the operating rod, and a spring, the operating rod being integrally formed into a crank shape from an upper part, a horizontal part, and a lower part, the upper and lower parts being provided so as to fit along the inner surfaces of the outer and inner walls of the case, the upper part being formed with the engaging rod that protrudes outward, and the lower part being pivotally supported so as to be rotatable in the vertical direction, the spring being connected between the upper part of the operating rod and the inner surface of the case A window lock device is provided, characterized in that the case is a member that is provided between walls and urges an operating rod toward the inner surface of the outer wall, the case has an L-shaped opening at the bottom that allows the operating handle to extend downward from the case and move inward and outward from the case, and an engagement hole that communicates with the L-shaped opening and faces diagonally upward is formed with which the operating handle can engage, the operating rod rotates by the operating handle around the contact point between the bent part from the top to the horizontal part and the inner surface of the outer wall of the case against the urging force of the spring, pulling the engagement rod toward the case to unlock it, and the operating handle is configured to engage with the engagement hole, thereby maintaining the unlocked state.

[0017] The spring is preferably a compression coil spring, and is wound around the outer periphery between the operating rod and the inner wall of the case on a spring mounting shaft fixed between the inner and outer walls of the case.

[0018] The case preferably comprises a case body and a case lid, each of which has a concave horizontal cross section, the case body being configured to have a locking mechanism mounted therein, and the case lid being configured to cover the case body from the outside.

[0019] A mounting member for a window frame, which has an inner mounting piece and an outer mounting piece, is abutted and fixed to the outer wall surface of the case, and the inner mounting piece and the outer mounting piece each have an L-shaped horizontal cross section, with a horizontal elongated hole formed in one side and a round hole formed in the other side, and with parts of them overlapping each other, bolts are inserted into the elongated hole and the round hole and screwed into the outer surface of the case, so that the spacing between the inner mounting piece and the outer mounting piece can be adjusted and fixed to the case. [Effects of the Invention]

[0020] The window lock device according to the present invention provides the following effects. (1) As a window locking device that can be installed as an auxiliary device, it has a simple structure, is less prone to malfunction, has a significantly reduced number of parts, is easy to manufacture, and can be provided and obtained at a low price. (2) It is designed so that anyone can easily and securely attach it to an existing window or door, and it can be easily operated by anyone except small children. (3) Locking can be prevented without the need for a separate lock prevention rod that prevents the locking mechanism from automatically locking. [Brief explanation of the drawings]

[0021] [Figure 1] 1A and 1B are diagrams illustrating an embodiment of a window locking device according to the present invention, in which FIG. 1A is a perspective view showing the state in which the window locking device is applied to a sliding window, and FIG. 1B is a perspective view showing the state in which an attachment member is attached to a case cover body. [Figure 2] 1A and 1B are perspective views illustrating the case of the window lock device of the embodiment, in which FIG. 1A shows the case body, FIG. 1B shows the case cover, and FIG. 1C shows a modified example of the main part of the case body. [Figure 3] 1A and 1B are perspective views illustrating the configuration of the window locking device of the above embodiment, in which (a) shows a configuration in which the locking mechanism is installed inside the case body, (b) shows the case lid, and (c) shows the lower end of the case lid. [Figure 4]1A and 1B are diagrams illustrating the window locking device of the above embodiment, in which (a) shows the locking mechanism with the case lid removed to indicate the locked state, (b) is a left side view of the case lid body, and (c) is a bottom view of the case lid body as seen in the CC direction in (b). [Figure 5] 1A and 1B are diagrams showing the locking mechanism with the case lid removed, illustrating the operation of the window locking device of the above embodiment. FIG. 1A shows the unlocking operation of the locking mechanism, and FIG. 1B shows the state in which the engaging rod of the locking mechanism abuts against the surface of the receiving bracket attached to the frame of the outer glass. [Figure 6] 1(a) and 1(b) are perspective views seen from the left outside of the case to explain the operation of the window lock device of the above embodiment, where 1(a) shows the locking state of the locking mechanism, and 1(b) shows the state in which the locking mechanism is unlocked and the operating handle is engaged with the locking hole of the case cover body, maintaining the unlocked state. [Figure 7] 1A and 1B are diagrams illustrating the main parts of the window lock device of the above embodiment, in which (a) is a diagram illustrating the configuration of the lower end of the case cover, particularly illustrating the L-shaped opening with a two-dot chain line, and (b) is a perspective view illustrating the crank-shaped operating rod, handle rod, pivot shaft, etc. BEST MODE FOR CARRYING OUT THE INVENTION

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A best mode for carrying out a locking device for a sliding window according to the present invention will be described below based on an embodiment with reference to the drawings. [Example]

[0023] In the present invention described in the specification, drawings and claims, the outside, as viewed from the inside of a building window, is referred to as the outside or exterior side, the inside of a building window is referred to as the interior or interior side, and the left and right sides (for example, the direction in which the sliding shoji screen of a sliding window is opened and closed) are referred to as the left-right direction, horizontal direction, side or lateral side.

[0024] (Example) Overall configuration: In the present invention, a shoji screen refers to a window body or door made of glass, resin, wood, etc., that can be moved horizontally to open and close, such as a sliding window, a single sliding window, a double sliding door, or a single sliding door. As shown in Figure 1(a), a sliding window 1 has an inner shoji screen 2 on the right side and an outer shoji screen 3 on the left side.

[0025] In this embodiment, the window lock device 6 according to the present invention will be described with reference to Figures 1 to 7, mainly in a configuration applied to a sliding window 1 (which also includes a "sliding door" adjacent to a balcony).

[0026] In Figure 1(a), the inner shoji screen 2 (inner shoji screen) on the right side and the outer shoji screen 3 (outer shoji screen) on the left side are configured to be opened and closed by sliding relative to each other. The window lock device 6 is equipped with such inner shoji screen 2 and outer shoji screen 3, and is attached to a sliding window 1 that is opened and closed by sliding it relative to each other, and is used for unlocking and locking.

[0027] The window lock device 6 is mounted inside the case 7 and includes a lock mechanism 10 (see Figures 3(a), 4(a), etc.) having an engaging rod 11, and a receiving bracket 12 (see Figure 1(a)) to which the engaging rod 11 can be engaged and disengaged. Below, the main components of the window lock device 6 will be described.

[0028] case: As shown in Figures 2(a) and 2(b), the case 7 comprises a case body 15 and a case lid 16. As shown in Figure 2(a), the case body 15 integrally comprises a side wall 17 (corresponding to the right wall of the case 7), an outer wall 18, and an inner wall 19, and has a concave horizontal cross section.

[0029] A rectangular hole 21 is formed on the upper end side of the outer wall 18 of the case body 15. The outer end side (locking end side) of the engagement rod 11, which will be described later, is inserted through this rectangular hole 21. As a modified example of the rectangular hole 21, a notch 22 may be used instead of the rectangular hole 21, as shown in FIG. 2(c). Screw holes 24 for screwing the case lid 16 are formed near the upper and lower ends of the inner wall 19 of the case body 15 and at the top of the outer wall 18.

[0030] Insertion holes 23 are formed facing each other at positions slightly above the middle in the vertical direction of the outer wall 18 and the inner wall 19 of the case body 15. The spring mounting shaft 44 is inserted through the insertion hole 23 to support it (see Figures 3(a), 4(a), etc.).

[0031] The case lid 16 is placed over the case body 15 from the side (left side) and functions as a lid to close the case body 15. As shown in FIG. 2(b), the case lid 16 is integrally formed with a side wall 30 (corresponding to the left side wall of the case 7), an outer wall 31, an inner wall 32, a top wall 33, and a bottom wall 36, and has a concave horizontal cross section.

[0032] Screw insertion holes 34 are formed at the upper and lower end sides of the inner wall 32 of the case lid 16 and at the upper part of the outer wall 31, at positions that respectively correspond to the screw holes 24 in the inner wall 19 and inner wall 18 of the case body 15. The screw insertion holes 34 in the case lid 16 are for inserting screws (not shown) that screw the case lid 16 into the screw holes 24 in the case body 15.

[0033] A concave notch 35 is formed on the upper end side of the outer wall 31 of the case cover 16. The notch 35 is provided in correspondence with the position of the rectangular hole 21 (or the notch 22 in the modified example) of the case body 15, and allows the engaging rod 11 to pass through.

[0034] Notches 53 are formed in the upper portions of the outer wall 31 and the inner wall 32 of the case lid 16 at positions corresponding to the insertion holes 23 formed in the inner wall 19 and the outer wall 18 of the case body 15. These notches 53 provide spaces into which bolts or the like can be inserted to secure the spring mounting shaft 44 inserted into the insertion holes 23 from the outer wall 31 and the inner wall 32 sides.

[0035] As shown in Figures 2(b), 3(b), (c), 4(c), 6, and 7(a), the bottom wall 36 of the case lid 16 covers part of the opening at the bottom of the case lid 16 but does not cover the entire opening. Specifically, an L-shaped opening 37 remains at the bottom of the case lid 16, and the bottom wall 36 covers part of the opening at the lower end of the case lid 16.

[0036] 2(b), 3(b), (c), 4(b), 6, and 7(a), a locking hole 38 is formed in the side wall 30, communicating with the L-shaped opening 37 and extending diagonally upward from the lower end of the side wall 30. As will be described later, this locking hole 38 is a portion for locking an operating handle 42 that operates the operating rod 40 and maintaining the unlocked state of the locking mechanism 10.

[0037] As shown in Fig. 3(b), screw holes 39 are formed on the top and bottom of the side wall 30. These screw holes 39 are used to attach a mounting member 60, which is used to attach the window lock device 6 to the window frame, to a vertical frame 61 of the inner glass panel 2, as shown in Fig. 1(a).

[0038] Locking mechanism: As shown in FIGS. 3 to 7, the lock mechanism 10 includes, as main components, an operating rod 40, an operating handle 42, a compression coil spring 43, and a spring mounting shaft 44.

[0039] As shown in Figures 3(a), 4(a), and 7(b), the operating rod 40 is formed from a long, thin plate material and has an upper portion 48, a horizontal portion 49, and a lower portion 50, and is generally formed in a crank shape when viewed from the side (shape when viewed from the side).

[0040] At the upper end of the operating rod 40, a narrow engaging rod 11 is provided that is bent outward at a right angle and protrudes outward from the upper end of the operating rod 40. A retaining hole 45 that is slightly long in the vertical direction and passes through the spring mounting shaft 44 is formed in the upper part 48 of the operating rod 40 (see Figures 3(a) and 7(b)).

[0041] An elongated hole 54 is formed in the upper portion 48 of the operating rod 40. This elongated hole 54 is provided to prevent the operating rod 40 from interfering with the inner end of the screw that passes through the screw insertion hole 34 of the case lid 16 and the screw hole 24 of the case body 15.

[0042] As shown in Fig. 7(b), the operating handle 42 has a boss portion 57 formed at its upper end and a grip portion 58 formed at its lower end. As shown in Figs. 4(b), 5, and 6(b), the boss portion 57 at the upper end of the operating handle 42 is pivotally supported by the pivot shaft 41 at the lower end of the lower portion 50 of the actuating rod 40 so as to be rotatable in the vertical direction.

[0043] As shown in Figures 3(a), 4(a), and 5, the locking mechanism 10 is mounted inside the case body 15. The spring mounting shaft 44 passes through the retaining hole 45 of the operating rod 40, protrudes from the insertion holes 23 at both its inner and outer ends, and is attached to the inner wall 19 and outer wall 18 of the case body 15 with nuts or the like so as not to come off.

[0044] A compression coil spring 43 is wound around the spring mounting shaft 44 between the inner wall 19 of the case body 15 and the upper part 48 of the operating rod 40. The compression coil spring 43 normally urges the upper part 48 of the crank-shaped operating rod 40 toward the outer wall 18 of the case body 15, maintaining the state shown in Figures 3(a) and 4(a).

[0045] It should be noted that the compression coil spring 43 need not be limited to this, and other types of springs may be used as long as they constantly urge the upper portion 48 of the crank-shaped operating rod 40 toward the outer wall 18 of the case body 15 .

[0046] The crank-shaped operating rod 40 is normally positioned by the biasing force of a compression coil spring 43 so that its upper portion 48 is aligned with the outer wall 18 of the case body 15 and its lower portion 50 is aligned with the inner wall 19. The engaging rod 11 is provided so as to protrude outward from a rectangular hole 21 in the case body 15.

[0047] Case cover 16 is placed over case body 15 to which locking mechanism 10 is attached (see FIG. 6). Then, screws are passed through screw insertion holes 34 (see FIGS. 2 and 3(b)) of case cover 16 and screwed into screw holes 24 (see FIG. 3(a)) of case body 15, thereby fixing case cover 16 to case body 15.

[0048] In this manner, when the case cover 16 is fixed to the case body 15, the engaging rod 11 can protrude outward through the rectangular hole 21 in the case body 15 and the notch 35 in the case cover 15 (see FIG. 6).

[0049] As shown in Figure 6(a), the operating handle 42 is configured to protrude downward from the case 7 through the L-shaped opening 37 at the bottom of the case lid 16. The operating handle 42 can be rotated upward around the pivot shaft 41 relative to the operating rod 40 by gripping the grip portion 58 (see Figure 6(b)).

[0050] Specifically, the operating handle 42 is guided by the L-shaped opening 37 and moves outward in the direction of arrow A (see Figure 6(a)), and when it is further rotated upward in the direction of arrow C, it enters the locking hole 38 in the case cover body 16 and then moves further inward diagonally upward so that it can be engaged (see Figure 6(b)).

[0051] Mounting structure of window lock device to window frame: As shown in Figure 1(a), the window locking device 6 is attached to the vertical frame 61 of the inner glass 3 via a mounting member 60 and double-sided adhesive tape or the like. As shown in Figures 1(a) and 1(b), the mounting member 60 has an inner mounting piece 62 and an outer mounting piece 63, and is fixed in contact with the outer surface of the case cover 16 of the window locking device 6, and is attached so as to clamp the vertical frame 61.

[0052] Specifically, the inner mounting piece 62 and the outer mounting piece 63 each have an L-shaped horizontal cross section, with a horizontal adjustment slot 64 formed in one of them (in this embodiment, the inner mounting piece 62) and a round hole (not shown) formed in the other.

[0053] As shown in Fig. 1(b), the inner mounting piece 62 and the outer mounting piece 63 are abutted against the outer surface of the case lid 16 in a state where they partially overlap each other. Then, a mounting bolt 66 is inserted through the adjustment elongated hole 64 and the round hole and screwed into the screw hole 39 (see Fig. 3(b)) on the outer surface of the case lid 16.

[0054] As a result, the inner mounting piece 62 and the outer mounting piece 63 are fixed to the outer surface of the case cover body 16 with the distance between them adjusted to match the width (width in the inner and outer directions) of the inner glass vertical frame 61.

[0055] The receiving bracket 12 is made of a thin strip of stainless steel or plastic material, and is engageable with and detachable from the engaging rod 11 of the window lock device 6. As shown in Figure 1(a), the receiving bracket 12 is fixed to the inner surface of the upper frame 4 of the outer shoji screen 3 with double-sided adhesive tape 67 (or it can be screwed in) as shown in Figures 1(a), 4(a), and 5.

[0056] The thickness of the receiving bracket 12 is formed to be smaller than the gap between the upper frame 4 of the outer shoji 3 and the upper frame 5 of the inner shoji 2 so that it does not get stuck (does not come into contact) when the sliding window 1 is opened or closed, i.e., when the outer shoji 3 is opened relative to the inner shoji 2. Specifically, for example, the thickness of the receiving bracket 12 is set to about 2 to 3 mm.

[0057] As shown in Fig. 1(a), the receiving fitting 12 has an engagement hole 70 formed at least on the end on the sliding side, into which the outer end of the engagement rod 11 can be engaged. Furthermore, one or more engagement holes 70 may be formed at intervals in the longitudinal direction of the receiving fitting 12 (see Fig. 1(a)).

[0058] (action) The operation of the window lock device 6 having the above configuration will be described below.

[0059] As described above, the receiving bracket 12 of the window lock device 6 is fixed to the inner surface of the upper frame 4 of the outer sash 3 with double-sided adhesive tape 67, as shown in Figure 1(a). When fixing the receiving bracket 12, the engaging rod 11 is fixed in a position where it can be inserted into the engaging hole 70.

[0060] When attaching the locking mechanism 10 of the window locking device 6 to the upper end of the vertical frame 61 of the inner shoji screen 2, as described above, the mounting member 60 is attached to the case 7, and the locking mechanism 10 is attached to the upper end of the vertical frame 61 of the inner shoji screen 2 via this mounting member 60.

[0061] When attaching the mounting member 60 to the case 7, the inner mounting piece 62 and the outer mounting piece 63 are adjusted so that they overlap inward and outward in accordance with the width of the vertical frame 61 of the inner shoji screen 2, and then fixed to the case cover body 16 by screwing the mounting bolt 66 into the screw hole 39 in its side wall 30 (see Figures 1 and 3(b)).

[0062] The locking mechanism 10 operates as follows: When the operating handle 42 is not touched and is in its natural state, the compression coil spring 43 exerts a biasing force F (see FIG. 4(a)) on the upper portion 48 of the operating rod 40 so that the upper portion 48 abuts against the inner surface of the outer wall 18 of the case body 15, as shown in FIGS. 3(a) and 4(a).

[0063] In this state, as shown in Figure 4(a), the engaging rod 11 protrudes outward from the case body 15, and when the outer screen 3 is closed, it engages with the engaging hole 70 of the receiving bracket 12, and the locking mechanism 10 is in a locked state. As a result, the sliding window 1 cannot be opened. Therefore, even if a small child tries to open the window, they cannot do so, which makes it possible to prevent them from falling out of the window.

[0064] When an adult opens the sliding window 1, as shown in Figure 5(a), they pull the operating handle 42 in the direction of arrow A against the biasing force of the compression coil spring 43. This causes the operating rod 40 to rotate in the direction of arrow B, with the bent portion 51 of the upper portion 48 and horizontal portion 49 of the operating rod 40 as a fulcrum, and the abutment portion 52 where the bent portion 51 and the outer wall 18 of the case body meet.

[0065] As a result, the locking mechanism 10 changes from the state shown in Figure 4(a) to the state shown in Figure 5(a). As a result, the engaging rod 11 retracts inward into the case body 15 as shown in Figure 5(a) and comes out of the engaging hole 70 of the receiving metal fitting 12, and the locking mechanism 10 enters an unlocked state in which the sliding window 1 is unlocked.

[0066] As a result, it becomes possible to open the sliding window 1. By opening the outer shoji screen 3 while pulling the operating handle 42 in the direction of arrow A, the sliding window 1 can be fully opened.

[0067] When the operating handle 42 is pulled in the direction of arrow A to unlock the door, and the outer screen 3 begins to open, and then the operating handle 42 is released, as shown in Figure 5(b), the operating rod 40 rotates in the direction of arrow B' with the contact portion 52 as a fulcrum due to the spring force F of the compression coil spring 43, and attempts to return to the state shown in Figure 4(a).

[0068] However, as shown in Figure 5(b), when the engaging rod 11 is pulled out of the engaging hole 70 of the receiving bracket 12, it abuts against the surface of the receiving bracket 12 and its rotation is restricted, so it abuts against the surface of the receiving bracket 12 and slides.

[0069] In this case, if there is only one engagement hole 70 on the receiving bracket 12 at its end, the outer sash 3 can be fully opened by opening it. However, as shown in Figure 1(a), if there is an engagement hole 70 at a location other than the end, the engagement rod 11 will engage from the engagement hole 70 at the end where it was pulled out into the next engagement hole 70, and the outer sash 3 will be locked in a half-open position. This allows the door to be locked with the degree of opening adjusted.

[0070] The window lock device 6 of the present invention can also be attached to the top of a terrace door (a sliding door for accessing a balcony). The purpose is to prevent an accident such as a small child opening the terrace door on their own, stepping out onto the balcony, and falling off the balcony.

[0071] However, even if the operating handle 42 is moved in the direction of arrow A as shown in Figure 5(a), when you release the operating handle 42, the spring force F of the compression coil spring 43 causes the operating rod 40 to return to the state shown in Figure 4(a), and the engaging rod 11 engages with the engaging hole 70.

[0072] Therefore, in the case of a terrace door, if an adult unlocks the window lock device 6, opens the terrace door, steps out onto the balcony, and then closes the terrace door, the engaging rod 11 of the window lock device 6 engages with the receiving bracket 12, automatically locking the door and preventing the adult from returning inside the room.

[0073] Therefore, in order to prevent such problems, the locking mechanism 10 according to the present invention has a very unique configuration for maintaining the locking mechanism 10 in the released state.

[0074] As shown in Figure 4(a), the operating handle 42 is rotatable in the vertical direction around the pivot shaft 41 relative to the operating rod 40, and further, the grip portion 58 is configured to be able to engage with the locking hole 38 of the case cover 16 by moving the operating handle 42 in the direction of arrow A and then rotating the operating rod 40 upward, as shown in Figure 6(b).

[0075] Specifically, the operation is as follows: As shown in Figures 5(a) and 6(a), the operating handle 42 is pulled in the direction of arrow A, and then the operating handle 42 is rotated about the pivot shaft 41 from the front lateral side relative to the operating rod 40 upward in the direction of arrow C, as shown in Figure 6(b), so that the grip portion 58 is inserted into the locking hole 38 of the case lid 18 and moved diagonally upward inward along the locking hole 38 until it is locked.

[0076] 3(c), 4(b), 6, and 7(a), the locking hole 38 is formed facing upward and inward on the side wall 30 of the case cover 18, and since the biasing force F of the compression coil spring 43 acts on the operating rod 40, the operating handle 42 is biased inward. Therefore, even if the operating handle 42 and the grip portion 58 rotate downward under their own weight and attempt to fall out of the locking hole 38, they engage with the edge of the locking hole 38 and will not fall out of the locking hole 38.

[0077] As shown in Figure 6(b), when the grip portion 58 is locked in the locking hole 38, the operating rod 40 does not return to the state shown in Figures 3(a) and 4(a) even when the spring force F of the compression coil spring 43 is applied, and the engaging rod 11 can be maintained in a retracted state toward the inside of the case 7.As in the prior invention, the locking mechanism 10 can be maintained in an unlocked state with a simple operation, without the need to prepare a separate lock prevention rod or the like.

[0078] For this reason, for example, if the window lock device 6 is applied to a sliding door for entering and exiting that faces a balcony, even if a user pulls the sliding door to go out onto the balcony and then tries to return inside the room, the lock mechanism 10 remains unlocked, preventing the sliding door from automatically locking and the user from being locked out.

[0079] Features of the present invention: The locking mechanism 10 of the window locking device 6 according to the present invention is characterized by its simple structure with a small number of parts and a structure that is less prone to malfunctions and other problems. In particular, the extremely distinctive structure and effects that have not been seen in the past will be explained below.

[0080] One of the characteristic features of the locking mechanism 10 is that the operating rod 40, which is formed with an engaging rod 11 and has a crank shape when viewed from the side, has its upper part 48 biased by a compression coil spring 43 so as to follow the outer wall 18 of the case body, its lower part 50 being arranged so as to follow the inner wall 19 of the case body, and an operating handle 42 that can rotate up and down around a pivot shaft 41 is provided at the lower end of the lower part 50.

[0081] By adopting such a configuration, the crank-shaped operating rod 40 can be rotated against the spring force F of the compression coil spring 43 by operating the operating handle 42 around the abutment part 52 with the inner surface of the outer wall 18 of the case body 15, without having a complex configuration with many parts such as a rotating shaft, and the engaging rod 11 can be pulled inward to easily unlock the door.

[0082] In this way, the crank-shaped operating rod 40 utilizes the principle of a lever, with the abutment point 52 with the inner surface of the outer wall 18 of the case body as the fulcrum. Therefore, the force required to operate the operating handle 42 against the biasing force of the compression coil spring 43 is relatively small, making it easy for an adult user to operate.

[0083] Normally, in the mechanisms of mechanical devices, the fulcrum of a lever requires a complex configuration such as providing a support shaft to pivotally attach the lever, but in locking mechanism 10 of the present invention, contact portion 52 serves as the fulcrum of the lever (see FIG. 5), so there is no need for a complex configuration such as providing a separate support shaft, resulting in a simple and neat structure that is less prone to malfunctions and other problems, and is also advantageous in terms of cost.

[0084] Furthermore, as described above, unlocking is performed by operating the operating handle 42, and then the operating handle 42 is rotated upward relative to the operating rod 40 to engage with the locking hole 38 formed in the case cover 16 from the lower end toward the inside, thereby maintaining the unlocked state without using a lock prevention rod or the like as in the prior invention, thereby preventing the sliding window from being inadvertently locked by the locking mechanism 10.

[0085] The above describes the form for implementing the window lock device of the present invention based on the embodiment, but it goes without saying that the present invention is not limited to such an embodiment, and there are various embodiments within the scope of the technical matters described in the claims. [Industrial Applicability]

[0086] The window locking device of the present invention can be installed in a place out of reach of small children, is easy to operate, and has a great locking effect, so it can be applied to sliding windows, sliding doors, single sliding windows, single sliding doors, terrace windows, terrace doors, etc. in apartment buildings, etc., and is extremely useful as a locking device for them. [Explanation of symbols]

[0087] 1. Sliding window 2 Inner Shoji Screen 3. Outer Shoji Screen 4. Upper frame of outer shoji screen 5 Upper frame of inner shoji screen 6 Window locking device 7 Cases 10 Locking mechanism 11 Engagement rod 12 Bracket 15 Case body 16 Case lid 17 Side wall of case body 18 Outer wall of case body 19 Inner wall of case body 21 Rectangular hole on the outer wall of the case body for inserting the engaging rod 22 Notch on the outer wall of the case body for inserting the engaging rod (a modified rectangular hole) 23 Insertion holes on the inner and outer walls of the case body (for attaching the spring mounting shaft) 24 Screw holes on the case body (for fixing to the case lid) 30 Side wall of case lid 31 Outer wall of case lid 32 Inner wall of case lid 33 Top wall of case lid 34 Screw insertion hole in case cover (for fixing to case body) 35 Notch for inserting the engaging rod of the case cover 36 Bottom wall of case lid 37 L-shaped opening at the bottom of the case lid 38 Locking hole of case lid 39 Screw holes in case cover (for fixing mounting components) 40 Operating rod 41 Pivot axis 42 Operating handle 43 Compression coil spring 44 Spring-mounted shaft 45 Operating rod retaining hole (for inserting spring mounting shaft) 48 Upper part of operating rod 49 Horizontal part of operating rod 50 Lower part of operating rod 51 Upper and lower bent portions of the operating rod 52 Contact portion between the bent portion and the inner surface of the outer wall of the case body 53 Notch for inserting spring mounting shaft in case cover 54 Slot at top of operating rod 57 Boss part of operating handle 58 Operating handle grip 60 Mounting member (member for attaching the window lock device to the vertical frame of the inner glass) 61 Inner glass vertical frame 62 Inner mounting piece of mounting member 63 Outer mounting piece of mounting member 64 Adjustment slot on inner mounting piece 66 Mounting bolts for mounting components 67 Double-sided adhesive tape 70 Engagement hole of receiving bracket

Claims

1. A window locking device for locking an openable window, comprising: a locking mechanism attached to one window frame of the openable window, the locking mechanism being fitted in a case and having an engaging rod; and a receiving metal fitting attached to the other window frame, with which the engaging rod can be engaged and disengaged; The locking mechanism includes an operating rod, an operating handle for operating the operating rod, and a spring. The operating rod is integrally formed in a crank shape from an upper portion, a horizontal portion, and a lower portion, the upper portion and the lower portion being provided along the inner surfaces of the outer wall and the inner wall of the case, respectively, and the engaging rod protruding outward is formed on the upper portion; The spring is a member provided between the upper part of the operating rod and the inner wall of the case, and biases the operating rod toward the inner surface of the outer wall. The operating handle is pivotally supported on the lower part of the operating rod so that it can rotate in the vertical direction and extend downward from the case.By moving the operating handle toward the outer wall of the case, the operating rod rotates around the contact point between the bent part from the top of the operating rod to the horizontal part and the inner surface of the outer wall of the case, against the spring force, and the engaging rod is pulled toward the case, thereby unlocking the window lock device.

2. A window locking device for locking an openable window, comprising: a locking mechanism attached to one window frame of the openable window, the locking mechanism being fitted in a case and having an engaging rod; and a receiving metal fitting attached to the other window frame, with which the engaging rod can be engaged and disengaged; The locking mechanism includes an operating rod, an operating handle for operating the operating rod, and a spring. The operating rod is integrally formed in a crank shape from an upper portion, a horizontal portion, and a lower portion, and the upper and lower portions are provided along the inner surfaces of the outer and inner walls of the case, respectively. The upper portion is provided with the engagement rod that protrudes outward, and the lower portion is provided with an operating handle that is pivotally supported so as to be rotatable in the vertical direction. The spring is a member provided between the upper part of the operating rod and the inner wall of the case, and biases the operating rod toward the inner surface of the outer wall. The case has an L-shaped opening at the bottom that allows the operating handle to extend downward from the case and move inward and outward from the case, and an engagement hole that communicates with the L-shaped opening and faces diagonally upward and into which the operating handle can engage, A window lock device characterized in that the operating rod rotates, against the spring force, by using the operating handle around the contact point between the bent part from the top to the horizontal part and the inner surface of the outer wall of the case, thereby pulling the engaging rod toward the case and unlocking it, and the operating handle is configured to engage with the engaging hole, thereby maintaining the unlocked state.

3. The window lock device according to claim 1 or 2, characterized in that the spring is a compression coil spring, and is wound around the outer periphery between the operating rod and the inner wall of the case on a spring mounting shaft fixed between the inner and outer walls of the case.

4. The case includes a case body and a case lid, The case body and the lid case lid each have a concave horizontal cross section, The case body is configured to have a locking mechanism mounted therein, 3. The window lock device according to claim 1, wherein the case cover is configured to cover the case body from the outside.

5. 3. The window lock device according to claim 1, wherein an attachment member for attaching to a window frame, which has an inner attachment piece and an outer attachment piece, is abutted against and fixed to the outer wall surface of the case, and the inner attachment piece and the outer attachment piece each have an L-shaped horizontal cross section, with a horizontal elongated hole formed in one side and a round hole formed in the other side, and when they are partially overlapped with each other, bolts are inserted into the elongated hole and the round hole and screwed into the outer surface of the case, so that the spacing between the inner attachment piece and the outer attachment piece can be adjusted and fixed to the case.

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