Window lock device

Abstract

To provide a window lock device having a simple and low-cost configuration, capable of being installed in an existing double sliding window or a single sliding window, which can be reliably locked with a simple operation.SOLUTION: A window lock device 6 comprises a lock mechanism 10 and a receiving fitting 12 that allows engagement / disengagement of an engaging rod 11. The lock mechanism 10 includes an actuation rod 40, the engaging rod 11, an operation member 42, an actuation rod support shaft 41, a compression coil spring 43 and a spring attachment shaft 44. The actuation rod support shaft 41 is laid between an outer wall 18 and an inner wall 19 of a case body 15. The operation member 42 integrally includes a lever part 53 rotatably attached to the actuation rod 40 and a handle rod part 54, and has a curved protrusion part 56 abutting on an inner face of the case body 15. The spring attachment shaft 44 has an outer end fixed on the actuation rod 40, and an inner end supported on the inner wall 19 of the case body 15. The compression coil spring 43 is disposed between the actuation rod 40 and the inner wall 19 of the case body 15.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a window lock device for preventing a child from falling out, which prevents an accident in which a child opens a sliding window by himself / herself and leans out of the window to fall out. [Background technology]

[0002] In recent years, there have been a number of tragic accidents in which young children have unlocked apartment buildings, opened sliding windows without permission, and leaned out 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 a window.

[0004] A known crescent lock has a belt-shaped receiving bracket with two engaging claws spaced apart along the longitudinal direction, and this receiving bracket 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 side glass (see Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 10-331501 Summary of the Invention [Problem to be solved by the invention]

[0006] As a means for locking a sliding window to prevent a small child from opening it without permission, a conventionally known crescent lock is effective to a certain extent.

[0007] However, from the perspective of adults, young children are creative and have the ability to be ingenious, so it is necessary to assume that they may use a chair or something in the room to reach into the crescent lock, operate it, and open it.

[0008] Therefore, even if a crescent lock is installed on a sliding window, a device for locking the sliding window is still required. For this reason, an auxiliary crescent lock may be provided, but the same configuration is meaningless.

[0009] A locking device that can be installed as an auxiliary measure to prevent small children from opening sliding windows without permission must at least meet the following requirements: (1) The locking device can be easily and securely attached in a position where it is out of reach 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 retrofit the door to an existing sliding door by folding it down. (4) The device is designed to be easily operable by users other than small children and to be automatically locked.

[0010] Incidentally, the conventional crescent lock shown in Patent Document 1 has a belt-shaped receiving bracket and is configured with two engaging claws spaced apart in the longitudinal direction, which allows the degree to which the sliding door is opened and maintained open to be adjusted, but fundamentally it is merely an improvement over the conventional crescent lock.

[0011] Since the band-shaped receiving bracket is arranged 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 problems remain. (1) The band-shaped brackets were attached to the inside of the glass of the exterior window sash, which makes it look bad when viewed from inside the room. (2) If the band-shaped receiving bracket is installed on the inside of the glass of the exterior window sash, it will be attached at a low position, which could lead to a small child using a chair or other object to grab it and release it. (3) A structure 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.

[0012] To solve the above-mentioned conventional problems, and to provide a window lock device that can be easily attached to windows of buildings such as apartment buildings in a position out of reach of small children, has a simple structure that can be easily attached after the fact, and can be manufactured and provided at low cost. [Means for solving the problem]

[0013] In order to solve the above problems, the present invention provides a window lock device for locking a window, the window lock device comprising: a lock mechanism mounted in a case and having a locking rod, which is attached to one window frame of an openable window; and a receiving metal fitting attached to the other window frame to which the locking rod can be engaged and disengaged. The lock mechanism comprises an operating rod, a locking rod, an operating member, an operating rod support shaft, and a compression coil spring. The operating rod has an operating rod fixed to its upper portion and a protruding shaft fixed so as to protrude to the side. A long hole is formed in the lower portion of the operating rod, and a lock mechanism is provided below the operating rod. A window lock device is provided, characterized in that the end edge is abutted against the inner surface of the case, the operating rod support shaft passes through a long hole in the operating rod and is installed inside the case, the operating member is integrally provided with a lever portion and a handle rod portion, the lever portion is rotatably attached to the protrusion of the operating rod and has a curved convex portion that abuts against the inner surface of the case, the handle rod portion is arranged to extend downward from the case, and the compression coil spring is arranged between the operating rod and the case and biases the operating rod.

[0014] In order to solve the above problems, the present invention provides a window lock device for locking a window, comprising: a lock mechanism which is attached to one window frame of an openable / closable window, is mounted within a case, and has a locking rod; and a receiving metal fitting which is attached to the other window frame and to which the locking rod can be engaged and disengaged, wherein the lock mechanism comprises an operating rod, a locking rod, an operating member, an operating rod support shaft, a compression coil spring, and a spring mounting shaft, the operating rod has a locking rod fixed to its upper end side perpendicular to the operating rod, a protruding shaft is fixed to the inner surface of the upper part of the operating rod so as to protrude laterally, a long hole is formed in the lower part of the operating rod, and the edge of the lower end of the operating rod abuts against the inner surface of the case, A window lock device is provided, characterized in that the moving rod support shaft passes through a long hole in the operating rod and is installed within the case, the operating member is integrally provided with an upper lever portion and a lower handle rod portion, the upper end of the lever portion is rotatably attached to a protrusion of the operating rod, a curved convex portion is formed on the outer surface of the lower part of the lever portion and abuts against the inner surface of the case, the handle rod portion is arranged to extend downward from the case, one end of the spring mounting shaft is fixed to the operating rod and the other end is supported by the case, and the compression coil spring is wound around the outer periphery of the spring mounting shaft between the operating rod and the inner surface of the case to bias the operating rod.

[0015] The case comprises a case body and a case lid, the case body being integrally formed with a right side wall, an outer wall, an inner wall and a bottom wall and having a concave horizontal cross section, and the case lid is placed over the case body and may be integrally formed with a left side wall, an outer wall, an inner wall and a top wall and having a concave horizontal cross section.

[0016] A mounting member for a window frame having an inner mounting piece and an outer mounting piece is abutted against and fixed to the outer wall surface of the case lid, and the inner mounting piece and the outer mounting piece each have an L-shaped horizontal cross section, with a horizontal long hole formed in one side and a round hole formed in the other side, and with parts of them overlapping each other, a bolt is inserted through the long hole and the round hole and screwed into the outer surface of the case lid, whereby the inner mounting piece and the outer mounting piece are fixed to the case lid in an adjustable manner in terms of the distance between them.

[0017] An anti-lock hole is formed in the outer wall of the case lid, and when an insertable anti-lock rod is inserted into this anti-lock hole, the anti-lock rod is positioned in the movement path of the operating rod, and the operating rod and the locking rod cannot move. Effect of the Invention

[0018] The window lock device according to the present invention provides the following effects. (1) The window can be installed in a position that makes it impossible for a small child to reach the window, even if they are using a chair or other device. (2) As an auxiliary window locking device, it has a simple structure, has a small number of parts, is easy to manufacture, and can be provided and obtained at a low price. (3) It can be easily and securely attached to existing windows or doors by anyone as a retrofit. (4) The device is designed to be easily operable by users other than small children and to be automatically locked. [Brief description of the drawings]

[0019] [Figure 1] 1 is a perspective view illustrating a state in which an embodiment of a window lock device according to the present invention is used; [Diagram 2] 3A and 3B are perspective views for explaining the case of the window lock device of the embodiment, in which (a) shows the case body and (b) shows the case cover. [Diagram 3] 1A and 1B are perspective views for explaining the window lock device of the above embodiment, in which (a) shows a configuration in which the lock mechanism is installed inside the case, (b) shows the state in which the mounting member is attached to the case lid, and (c) shows a plan view of the lock prevention rod and its XX cross section. [Figure 4] 5A and 5B are diagrams for explaining the operation of the window lock device of the above embodiment, in which (a) shows a locked state and (b) shows an unlocked state. [Diagram 5] 1A and 1B are diagrams for explaining the operation of the window lock device of the above embodiment, in which (a) shows the state in which the locking rod is in contact with the surface of the receiving bracket attached to the frame of the outer glass, and (b) shows the state in which the lock prevention rod has been inserted to prevent the device from being locked. BEST MODE FOR CARRYING OUT THEINVENTION

[0020] 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. EXAMPLES

[0021] In the present invention described in the specification, drawings and claims, when viewed from the inside of a building window, the outside is referred to as the outside or exterior side, the inside of the building window is referred to as the inside or interior side, and the left and right sides (for example, the direction in which the sliding screen of a sliding window is opened and closed) are referred to as the left-right direction, lateral direction, side or side side.

[0022] Overall configuration: In the present invention, a shoji refers to a window body or door made of glass, resin, wood, etc., that can be opened and closed by moving horizontally, such as a sliding window, a single sliding window, a single sliding door, etc. As shown in Figure 1, a sliding window 1 has an inner shoji 2 on the right side and an outer shoji 3 on the left side.

[0023] In this embodiment, a window lock device 6 according to the present invention will be described with reference to Figs. 1 to 5, mainly in a configuration applied to a sliding window 1 (which also includes "sliding doors").

[0024] In FIG. 1, 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 able to slide relative to one another, and can be opened and closed by sliding them relative to one another.

[0025] The window lock device 6 has an inner screen 2 and an outer screen 3 as described above, and is attached to the sliding window 1 that is opened and closed by sliding it, and is used for unlocking and locking.

[0026] The window lock device 6 includes a lock mechanism 10 (see FIG. 3(a)) having a locking rod 11 mounted in a case 7 as shown in FIG. 1, and a receiving bracket 12 (see FIG. 1) to which the locking rod 11 can be engaged and disengaged. Below, the main components of the window lock device 6 will be described.

[0027] case: 2(a) and (b), the case 7 comprises a case body 15 and a case lid 16. As shown in FIG. 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, an inner wall 19 and a bottom wall 20, and has a concave horizontal cross section.

[0028] A long hole 21 that is long in the vertical direction 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 locking rod 11 described below is inserted into this long hole 21. Screw holes 22 for screwing the case lid 16 are formed near the upper and lower ends of the inner wall 19 of the case body 15.

[0029] A vertically long slot 23 is formed in the approximate middle of the inner wall 19 of the case body 15 in the vertical direction. The inner end of the spring mounting shaft 44 is inserted through this slot 23 to support it movably in the vertical direction.

[0030] A screw insertion hole 24 is formed below the long hole 23 in the inner wall 19 of the case body 15. A bolt insertion hole 25 is formed in the lower part of the outer wall 18 of the case body 15 at a position corresponding to the position of the screw insertion hole 24.

[0031] As will be described later, an operating rod support shaft 41 that supports the operating rod 40 is installed across the inner wall 19 and the outer wall 18 of the case body 15. A stud bolt 51 that constitutes the operating rod support shaft 41 is inserted through the through hole 25, and the screw insertion hole 24 is for screwing the tip threaded portion of the stud bolt 51.

[0032] 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 and a top wall 33, and has a concave horizontal cross section.

[0033] Screw insertion holes 34 are formed on the upper and lower ends of the inner wall 32 of the case lid 16 at positions corresponding to the screw holes 22 on the upper and lower ends of the inner wall 19 of the case body 15. The upper and lower screw insertion holes 34 are for inserting screws (not shown) that screw the case lid 16 into the screw holes 22 of the case body 15.

[0034] A concave-shaped notch 35 is formed on the upper end side of the outer wall 31 of the case cover 16. The locking rod 11 is inserted through the notch 35. A notch 36 is formed on the lower end side of the outer wall 31 of the case cover 16. The stud bolt 51 of the operating rod support shaft 41 is inserted through the notch 36 to expose its head.

[0035] A notch 37 is formed in the vertical center of the inner wall 32 of the case cover 16 at a position corresponding to the long hole 23 of the case body 15. This notch 37 faces the long hole 23 that supports the inner end of the spring mounting shaft 44, described below, in a tiltable manner, and exposes the inner end of the spring mounting shaft 44.

[0036] Furthermore, a notch 37 is formed below the notch 37 in the inner wall 32 of the case cover 16. This notch 37 forms a space for exposing the inner end of the operating rod support shaft 41 described below. It may also be a space for screwing a nut (not shown) into the threaded portion of the inner end of the stud bolt 51.

[0037] Locking Mechanism: As shown in Figs. 3 to 5, the lock mechanism 10 includes, as main components, an operating rod 40, a locking rod 11, an operating rod support shaft 41, an operating member 42, a compression coil spring 43, and a spring mounting shaft 44.

[0038] The locking rod 11 is fixed to the upper end of the operating rod 40 at right angles to the operating rod 40, and together they form a cross shape. A protrusion 48 is fixed to the inner surface of the upper part of the operating rod 40 so as to protrude laterally (toward the inside of the paper in FIG. 4).

[0039] A long hole 49 that is long in the vertical direction is formed in the lower part of the operating rod 40. The edge (outer edge) of the lower end of the operating rod 40 abuts against the inner surface of the outer wall 18 of the case body 15 at an abutment part 77 (see Figs. 3(b) to 5). As will be described later, the operating rod 40 is rotatable about this abutment part 77 as a fulcrum.

[0040] The operating rod support shaft 41 is inserted through the long hole 49 of the operating rod 40 to support the operating rod 40, and is composed of a stud bolt 51 and a support tube 52 into which the stud bolt 51 is inserted.

[0041] The stud bolt 51 is inserted through the bolt insertion hole 25 of the case body 15 at the position of the notch 36 of the case lid 16, passes through the support cylinder 52, and is fixed by being screwed into the screw hole 24 of the inner wall 19 of the case body 17. The screw hole 24 faces the notch 38 of the inner wall 32 of the case lid 16.

[0042] As a result, the operating rod support shaft 41 is installed across between the outer wall 18 and the inner wall 19 of the case body 15. The operating rod support shaft 41 supports the locking rod 11 at its support cylinder 52 so as to prevent it from dropping downward.

[0043] 3 to 5, the operating member 42 is integrally provided with an upper lever portion 53 and a lower handle rod portion 54, and is generally formed in a generally V-shape in side view. A ring portion 55 is formed at the upper end of the lever portion 53. The ring portion 55 is rotatably fitted onto the projection 48 of the actuating rod 40.

[0044] A curved protrusion 56 is formed on the outer surface of the lever portion 53. The curved protrusion 56 abuts against the inner surface of the outer wall 18 of the case body 15. The operating member 42 is rotatable about an abutment portion 57 between the inner surface of the outer wall 18 of the case body 15 and the curved protrusion 56. The handle rod portion 54 extends downward from the case, and a grip ball 58 is fixed to the lower end thereof as a grip portion.

[0045] As shown in Figures 3 to 5, the outer end of the spring mounting shaft 44 is fixed to the inner surface of the operating rod 40, and its inner end is inserted through a spring abutment piece 45 provided on the inner surface side of the inner wall 19 of the case body 15, and is further inserted through a vertically long hole 23 formed in the inner wall 19 of the case body 15 to be supported.

[0046] The compression coil spring 43 is wound around the outer periphery of a spring mounting shaft 44. The inner end of the compression coil spring 43 abuts against the inner surface of the operating rod 40, and the outer end of the compression coil spring 43 abuts against the inner wall 19 of the case body 15 via a spring abutment piece 45.

[0047] As described above, the case body 15 on which the locking mechanism 10 is mounted is covered from the side with the case lid 16, and screws are passed through the screw insertion holes 34 formed on the top and bottom of the inner wall 19 of the case lid 16 and then screwed into the screw holes 22 formed on the top and bottom of the case body 15, thereby housing the locking mechanism 10 within the case 7.

[0048] As shown in Fig. 1, the window lock device 6 is attached to the vertical frame 61 of the inner glass 3 via a mounting member 60 and, for example, double-sided adhesive tape. As shown in Figs. 1 and 3(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 lock device 6 and is attached so as to clamp the vertical frame 61.

[0049] Specifically, the inner mounting piece 62 and the outer mounting piece 63 each have an L-shaped horizontal cross section, with a horizontal adjustment long hole 64 formed in one of them (in this embodiment, the inner mounting piece 62) and a round hole (not shown) formed in the other.

[0050] 3(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 partially overlapping state. Then, the mounting bolt 66 is inserted through the adjustment elongated hole 64 and the round hole and screwed into the outer surface of the case lid 16.

[0051] As a result, the inner mounting piece 62 and the outer mounting piece 63 are fixed to the outer surface of the case lid 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.

[0052] The receiving bracket 12 is detachable from the locking rod 11 of the window lock device 6, and is made of a thin strip of metal such as aluminum or plastic. As shown in Figure 1, the receiving bracket 12 is fixed to the inner surface of the upper frame 4 of the outer door 3 with double-sided adhesive tape 67 (or with screws), as shown in Figures 1, 4, and 5.

[0053] The thickness of the receiving metal fitting 12 is formed to be smaller than the gap between the upper frame 4 of the outer door 3 and the upper frame 5 of the inner door 2 so that it does not get caught (does not come into contact) when the sliding window 1 is opened or closed, i.e., when the outer door 3 is opened relative to the inner door 2. Specifically, for example, the thickness of the receiving metal fitting 12 is about 2 to 3 mm.

[0054] As shown in Fig. 1, 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 locking 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).

[0055] 2(a), a lock prevention rod insertion hole 71 is formed in the side wall 30 of the case cover 16. In addition, a lock prevention rod insertion hole 72 is also formed in each of the inner mounting piece 62 and the outer mounting piece 63.

[0056] These lock prevention rod insertion holes 72 are formed at positions that match the lock prevention rod insertion holes 71 of the case lid 16 when the inner mounting piece 62 and the outer mounting piece 63 are attached to the case lid 16.

[0057] This makes it possible to insert the lock prevention rod 74 into the lock mechanism 10 from outside. Figure 5(b) shows the state in which the lock prevention rod 74 has been inserted into the lock mechanism 10 from outside. When the lock prevention rod 74 is inserted into the lock mechanism 10, it is inserted between the operating rod 40 and the outer wall 18 of the case body 15.

[0058] In other words, the lock prevention rod 74 is inserted into the movement path of the operating rod 40. As a result, even if the operating rod 40 is biased by the compression coil spring 43, its movement is restricted by the lock prevention rod 74. Therefore, the locking rod 11 cannot protrude sufficiently from the receiving metal fitting 12 side, and therefore cannot be locked.

[0059] (action) The operation of the window lock device 6 having the above configuration will be described below.

[0060] 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. When fixing the receiving bracket 12, the locking rod 11 is fixed in a position where it can be inserted into the engagement hole 70.

[0061] When attaching the locking mechanism 10 of the window locking device 6 to the upper end of the vertical frame 61 of the inner 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 screen 2 via this mounting member 60.

[0062] When attaching the mounting member 60 to the case, the inner mounting piece 62 and the outer mounting piece 63 are adjusted so that they overlap in the inward and outward directions according to the width of the vertical frame 61 of the inner screen 2, and then fixed to the side wall 30 of the case cover body 16 with a mounting bolt 66 (see Figures 1 and 3).

[0063] The function of the locking mechanism 10 is as follows: When the handle rod portion 54 is not held with hands and is in a natural state, the biasing force of the compression coil spring 43 presses the operating rod 40 against the inner surface of the outer wall 18 of the case body 15, as shown in Fig. 4(a).

[0064] In this state, when the outer screen 3 is closed, the locking rod 11 protrudes outward from the case body 15 and engages with the engagement hole 70 of the receiving metal fitting 12, resulting in a locked state. Therefore, the sliding window 1 cannot be opened. Therefore, even if a small child tries to open the window, he or she cannot do so, which makes it possible to prevent children from falling out of the window.

[0065] When an adult opens the sliding window 1, as shown in Fig. 4(b), the handle rod portion 54 is pulled in the direction of arrow A against the biasing force of the compression coil spring 43. Then, the operating member 42 and the actuating rod 40 rotate as shown by arrows B and C, respectively.

[0066] As a result, the lock mechanism 10 changes from the state shown in Fig. 4(a) to the state shown in Fig. 4(b). As a result, the lock rod 11 is pulled toward the inside of the case 7 and is pulled out of the engagement hole 70 of the receiving metal fitting 12, as shown in Fig. 4(b).

[0067] As a result, the sliding window 1 is unlocked, making it possible to open the sliding window 1. With the handle portion 54 pulled in the direction of the arrow A, the outer door 3 can be opened fully.

[0068] In addition, when the handle rod portion 54 is pulled in the direction of arrow A to unlock the door, and the outer screen 3 begins to open before the handle rod portion 54 is released, the compression coil spring 43 urges the operating member 42 and the actuating rod 40 to rotate in the directions B' and C', respectively, as shown in Figure 5(a), and they attempt to return to the state shown in Figure 4(a).

[0069] However, as shown in FIG. 5(a), when the locking rod 11 is pulled out of the engagement hole 70 of the receiving bracket 12, it abuts against the surface of the receiving bracket 12 and its rotation is restricted, so that the locking rod 11 abuts against the surface of the receiving bracket 12 and slides.

[0070] In this case, if there is only one engagement hole 70 on the receiving bracket 12 at its end, the outer door 3 can be fully opened by opening it. However, as shown in Figure 1, if there is an engagement hole 70 at a location other than the end, the locking rod 11 will engage with the next engagement hole 70 from the engagement hole 70 at the end where it was pulled out, and the outer door 3 will be locked in a half-open state.

[0071] The window lock device 6 of the present invention can also be attached to the top of a terrace door (a sliding door for entering and exiting a balcony). The purpose of this is to prevent an accident in which a small child opens the terrace door by himself, steps onto the balcony, and falls off the balcony.

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

[0073] In order to prevent such problems, the window locking device 6 of the present invention is configured so that during times when adults are entering and exiting the terrace doors, the window will not automatically be locked when the lock prevention rod 74 is inserted into the locking mechanism 10 through the lock prevention insertion holes 72 and 71 of the window locking device 6.

[0074] That is, when the lock prevention rod 74 is inserted into the lock prevention insertion hole 72, as shown in FIG. 5(b), even if the compression coil spring 43 urges the operating member 42 and the operating rod 40 to rotate in the directions B' and C', respectively, the movement of the operating rod 40 is restricted by the lock prevention rod 74.

[0075] As a result, the locking rod 11 cannot protrude sufficiently outward and is not locked without engaging with the locking hole 70 of the receiving metal fitting 12. In this way, the above-mentioned problem of the door being automatically locked and not being able to return to the room can be prevented.

[0076] Furthermore, during times when adults are not entering or exiting the terrace door, the door can be locked automatically by the window lock device 6 without using such a lock prevention rod 74, and can be unlocked by operating the handle rod portion 54 as necessary.

[0077] Features of the present invention: The lock mechanism 10 of the window lock device 6 according to the present invention will now be described in detail with reference to its unique and unprecedented structure and operation.

[0078] In the locking mechanism 10 in the state shown in FIG. 4(a), when the handle rod portion 54 of the operating member 42 is pulled as shown by arrow A in FIG. 4(b) against the biasing force of the compression coil spring 43, the lever portion 53 of the operating member 42 rotates as shown by arrow B around the abutment portion 57, because the curved protrusion 56 is abutting against the inner surface of the outer wall 18 of the case body 15.

[0079] Then, because the ring portion 55 formed on the upper end of the lever portion 53 is rotatably fitted onto the projection 48 of the operating rod 40, the operating rod 40 is rotated as shown by arrow C around the edge of its lower end and the abutment portion 77 on the inner surface of the outer wall 18 of the case body 15. As the operating rod 40 rotates, the locking rod 11 is pulled toward the inside of the case, and the case is unlocked.

[0080] In this way, the operating member 42 utilizes the principle of a lever, with the curved convex portion 56 of the lever portion 53 and the abutment portion 56 on the inner surface of the outer wall 18 of the case body 15 as the fulcrum, so that only a small force is required to operate the operating handle rod portion 54 against the biasing force of the compression coil spring 43.

[0081] Usually, in the mechanisms of mechanical devices, the fulcrum of a lever requires a complex configuration such as providing a spindle to pivot the lever, but the locking mechanism 10 of the present invention does not require such a complex configuration as providing a spindle, and the structure is simple and neat, is less likely to cause malfunctions and other problems, and is also advantageous in terms of cost.

[0082] Furthermore, the operating rod 40, which rotates in conjunction with the operating member 42, rotates around the abutment portion 77 between the edge of its lower end and the inner surface of the outer wall 18 of the case body 15 as a fulcrum. As such, like the operating member 42, there is no need for a complex structure such as a pivot shaft for pivot attachment. The structure is simple and neat, is less susceptible to malfunctions and other problems, and is also advantageous in terms of cost.

[0083] 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 various embodiments are possible within the scope of the technical matters described in the claims. [Industrial Applicability]

[0084] The window lock device of the present invention can be installed in a place out of reach of small children, is easy to operate, and has a strong 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 and is extremely useful as a locking device for them. [Explanation of symbols]

[0085] 1. Sliding windows 2. Inner Shoji Screen 3. Outside 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 Locking rod 12 Bracket 15 Case body 16 Case cover 17 Side wall of case body 18 Outer wall of case body 19 Inner wall of case body 20 Bottom wall of case body 21 Long hole on the outer wall of the case body 22 Screw holes on the inner wall of the case body 23 Long hole on the inner wall of the case body 24 Screw hole for operating rod support shaft on inner wall of case body 25 Bolt hole for operating rod support shaft on outer wall of case body 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 Case cover screw insertion hole 35 Notch for inserting locking rod in case cover 36 Notch on the outer wall of the case cover facing the bolt for the operating rod support shaft 37 Notch on the inner wall of the case cover that faces the spring mounting shaft 38 Notch on the inner wall of the case cover facing the bolt for the operating rod support shaft 40 Operating rod 41 Operating rod support shaft 42 Operating member 43 Compression coil spring 44 Spring-loaded shaft 45 Spring abutment piece 48 Protrusion of operating rod 49 Long hole in the operating rod 51 Stud bolt for operating rod support shaft 52 Support cylinder of operating rod support shaft 53 Lever part of operating member 54 Handle rod of operating member 55 Lever Ring 56 Curved convex portion of lever 57 Contact portion between the curved convex portion of the lever and the case lid 58 Handle bar grip ball 60 Mounting material 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 parts 67 Double-sided adhesive tape 70 Engagement hole of receiving bracket 71 Case cover lock prevention rod insertion hole 72 Lock prevention rod insertion hole of mounting member 74 Lock prevention rod 77 The contact portion between the edge of the lower end of the operating rod and the inner surface of the outer wall of the case body

Claims

1. A window lock device for locking a window, comprising: a lock mechanism attached to one window frame of an openable window, mounted in a case, and having a locking rod; and a receiving metal fitting attached to the other window frame and to which the locking rod can be engaged and disengaged, The lock mechanism includes an operating rod, a locking rod, an operating member, an operating rod support shaft, and a compression coil spring. A locking rod is fixed to the upper part of the operating rod, and a protruding shaft is fixed so as to protrude laterally. A long hole is formed in the lower part of the operating rod, and the edge of the lower end of the operating rod abuts against the inner surface of the case. The operating rod support shaft passes through the long hole of the operating rod and is installed inside the case. The operating member is integrally provided with a lever portion and a handle portion, the lever portion is rotatably attached to a protrusion of the actuation rod, and is formed with a curved convex portion that abuts against an inner surface of the case, and the handle portion is provided so as to extend downward from the case, A window lock device characterized in that the compression coil spring is arranged between the operating rod and the case to bias the operating rod.

2. A window lock device for locking a window, comprising: a lock mechanism attached to one window frame of an openable window, mounted in a case, and having a locking rod; and a receiving metal fitting attached to the other window frame to which the locking rod can be engaged and disengaged, The lock mechanism includes an operating rod, a locking rod, an operating member, an operating rod support shaft, a compression coil spring, and a spring mounting shaft. The operating rod has a locking rod fixed to its upper end at a right angle to the operating rod, a protruding shaft fixed to the inner surface of the upper part of the operating rod so as to protrude laterally, a long hole is formed in the lower part of the operating rod, and the edge of the lower end of the operating rod abuts against the inner surface of the case, The operating rod support shaft passes through the long hole of the operating rod and is installed inside the case. The operating member is integrally provided with an upper lever portion and a lower handle portion, the upper end of the lever portion is rotatably attached to the protrusion of the actuating rod, a curved convex portion is formed on the outer surface of the lower portion of the lever portion and abuts against the inner surface of the case, and the handle portion is provided to extend downward from the case, The spring-loaded shaft has one end fixed to the operating rod and the other end supported by the case, A window lock device characterized in that the compression coil spring is wound around the outer periphery of a spring mounting shaft between the operating rod and the inner surface of the case, and is configured to bias the operating rod.

3. The case includes a case body and a case cover, the case body including a right side wall, an outer wall, an inner wall, and a bottom wall, and has a horizontal cross section that is concave.

3. The window lock device according to claim 2, wherein the case cover is fitted onto the case body, and is integrally provided with a left side wall, an outer wall, an inner wall and a top wall, and has a concave horizontal cross section.

4. The window lock device according to claim 3, characterized in that an attachment member for a window frame having an inner attachment piece and an outer attachment piece is abutted against and fixed to the outer wall surface of the case lid, the inner attachment piece and the outer attachment piece each having an L-shaped horizontal cross section, a horizontal elongated hole formed in one side and a circular hole formed in the other side, and with a portion of each piece overlapping each other, a bolt is inserted through the elongated hole and the circular hole and screwed into the outer surface of the case lid, thereby fixing the inner attachment piece to the case lid in an adjustable manner in terms of the distance between the inner attachment piece and the outer attachment piece.

5. A window lock device as described in claim 3 or 4, characterized in that an anti-lock hole is formed in the outer wall of the case lid, and when an insertable anti-lock rod is inserted into this anti-lock hole, the anti-lock rod is positioned in the movement path of the operating rod, and the operating rod and the engaging rod cannot move.

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