TWM547028U - Rotary lock strip and door/window latch device and sliding window structure - Google Patents

Description

Rotating lock piece, door and window lock device and cross window structure

The present invention relates to a rotary locking piece and a door and window locking device and a horizontal sliding window structure, in particular to a rotating locking piece and a door and window locking device and a horizontal pulling device which can make the sliding window structure have a close fitting locking effect. Window structure.

According to the window structure, it is a common and common structure in general buildings. It is mainly installed in the reserved openings of the building to achieve the main effect of indoor and outdoor communication for ventilation. The general horizontal sliding window structure is mainly composed of two The overlapped sash is combined with the glass set in the sash. When the two sashes are pulled apart in the opposite direction, the entire window structure can be closed, and when the two sashes overlap, The window structure can be opened, so the general window structure is further provided with a locking device with a snapping mechanism to prevent the window structure from being opened under the closed condition; however, in the process of locking, the internal and external good must be promoted first. The window frame is close to the window frame, and there is no excessive space for the bolt to be inserted and closed. Therefore, the operation is relatively troublesome and inconvenient, and the general frame cannot control the density of the inner and outer window frames. By the gap, it will seriously affect the airtightness and sound insulation of the metal window.

Therefore, the "Metal Window Opening and Closing Control Device" of the Republic of China New Patent No. M375115 is used to solve the above problems. Please refer to Figure 1 for a schematic diagram of the structure of the conventional metal window opening and closing control device. A shutter (C) is arranged in the straight frame rod (B) on the side of the window frame (A) before the lateral displacement in the window frame, so as to lock the opposite straight frame rod of the rear window frame (D) backwards (E) The shutter is driven by an operating handle to drive a card member (F) to extend from the front to the rear to engage the opposite straight frame rod (E) of the rear window frame (D); The straight frame rod (E) of the fan window frame (D) is provided with a guide member (G) protruding forward toward the front window frame (A), and the side of the guide member (G) corresponds to the card member (F) ) a guiding action portion (H) is provided, and the guiding component (H) of the pushing guide member (G) is contacted by the clamping member (F) to generate a lateral component to push the front window frame (A) and the rear fan The window frame (D) is respectively traversed and closed to position the opposite side frames of the window frame, so that the closing window is more secure and the opening and closing operation is more rapid and convenient; however, this patent requires a straight frame in the front window frame (A). Rod (B) and rear frame (D) straight frame rod (E) The guide member (G) and the hook strip have complicated manufacturing steps and require high installation cost; therefore, how to lock the sliding window structure with a tightly fitting locking effect by an innovative hardware design The lock device that achieves the sliding window structure is simple and easy to operate, and has the safety and low production cost. It is still a problem that the development industry and related researchers of the related industries such as the production and sale of the door and window lock device need to continuously overcome and solve the problem. .

The reason is that the creators, in view of this, and through their rich professional knowledge and years of practical experience, have improved and created a rotating lock piece, door and window lock device and horizontal window structure, the purpose of which is to provide a The rotary locking piece, the door and window locking device and the horizontal sliding window structure which make the sliding window structure produce a close-fitting locking effect are mainly designed by the hardware design of the hook portion on the rotating locking piece, and are also arranged in the door and window lock. The fastening parts at the inner end of the device are hooked to each other, effectively locking the sliding window structure with a tightly fitting locking effect, and the locking device of the sliding window structure is simple and easy to operate, and has safety and low production cost. The advantage.

According to the purpose of the present invention, a rotary locking piece is provided, which comprises at least one body, a pivoting portion is provided, and the body has a front end of the body and a tail end of the body; a hook portion is formed in an arc shape, and the hook portion is formed in an arc shape. The front end of the hook portion extends from the tail end of the body and the tail end of the hook portion is located above the front end of the body, and the tail end of the hook portion is spaced from the front end of the body a distance; and a support portion connecting the body and the hook portion.

According to the above technical feature, the hook portion has a curvature which gradually increases from the tail end of the hook portion to the front end of the hook portion.

According to the above technical feature, the hook portion has a first arc portion and a second arc portion, and the first arc portion extends from a first node of the hook end to the front end of the hook portion, the second arc The second portion of the front end of the hook extends from the second end of the hook portion to the end of the hook portion, the first arc portion has a first curvature, and the second arc portion has a second curvature, the first curvature and the first curvature The second curvature system can be the same or different.

According to the above technical feature, the first curvature system is smaller than the second curvature.

According to the above technical feature, the hook portion has a radius of curvature which gradually becomes smaller from the tail end of the hook portion to the front end portion of the hook portion.

According to the above technical feature, the distance between the center point of rotation of the pivoting portion and the first node of the tail end of the hook portion is a first radius of curvature, and the center point of rotation and the second node of the front end of the hook portion The distance is a second radius of curvature that is greater than or equal to the second radius of curvature.

According to the above technical feature, the first radius of curvature is greater than the second radius of curvature.

According to the above technical feature, the hook portion has a curvature width which gradually increases from the hook end to the hook front end.

According to the above technical feature, wherein the hook end has a first curvature width and the hook front end has a second curvature width, the first curvature width being less than or equal to the second curvature width.

According to the above technical feature, the first curvature width is smaller than the second curvature width.

According to the above technical feature, the support portion is disposed at a center or a side of the hook portion.

According to the above technical feature, the curvature is gradually increased from the tail end of the hook to the front end of the hook, and the radius of curvature gradually becomes smaller from the tail end of the hook to the front end of the hook.

According to the above technical feature, the curvature is gradually increased from the tail end of the hook to the front end of the hook, and the curvature width gradually becomes larger from the tail end of the hook to the front end of the hook.

According to the above technical feature, the radius of curvature gradually decreases from the tail end of the hook portion to the front end of the hook portion, and the curvature width gradually increases from the tail end of the hook portion to the front end portion of the hook portion.

According to the above technical feature, wherein the curvature is gradually increased from the tail end of the hook to the front end of the hook, the radius of curvature gradually decreases from the tail end of the hook to the front end of the hook, the curvature width being determined by the hook The tail end to the front end of the hook gradually becomes larger.

According to the above technical feature, the hook portion has the first arc portion and the second arc portion, and the first arc portion extends from the first node of the hook end to the front end of the hook portion, the second arc Truss extending from the second node of the front end of the hook toward the tail end of the hook, the first arc has the first curvature, and the second arc has the second curvature, the first curvature The second curvature system may be the same or different; the distance between the rotation center point and the first node is the first radius of curvature, and the distance between the rotation center point and the second node is the second radius of curvature, the first a radius of curvature is greater than or equal to the second radius of curvature; the tail end of the hook has the first curvature width and the front end of the hook has the second curvature width, the first curvature width being less than or equal to the second curvature width .

According to the above technical feature, the hook portion is integrally formed with the body.

According to the above technical feature, the support portion is integrally formed with the body and the hook portion.

In addition, according to another object of the present invention, the present invention further provides a door and window locking device, which comprises at least the aforementioned rotating locking piece and a fastening component, wherein the rotating locking piece can The fasteners are hooked to each other.

According to another object of the present invention, the creator further proposes a horizontal sliding window structure, which comprises at least the foregoing door and window locking device, a first window frame and a second window frame, wherein the rotation The locking piece is disposed inside the first window frame and the fastening component is disposed inside the second window frame, the pivoting portion is pivotally connected to the base, and the base is fixed or locked to the first A window frame.

Therefore, the rotary locking piece, the door and window locking device and the horizontal sliding window structure of the present invention are mainly designed by the hardware design of the hook portion on the rotating locking piece to engage with the fastening member also disposed on the door and window locking device. The utility model can effectively lock the sliding window structure with the tightly fitting locking effect, and realizes that the locking device of the sliding window structure is simple and easy to operate, and has the advantages of safety and low production cost.

In order to understand the technical characteristics, content and advantages of the creation and the effects that can be achieved by the examiner, the author will use the drawings in detail and explain the following in the form of the examples, and the drawings used therein The subject matter is only for the purpose of illustration and supplementary instructions. It is not necessarily the true proportion and precise configuration after the implementation of the original creation. Therefore, the proportions and configuration relationships of the attached drawings should not be interpreted or limited in the actual implementation scope. First described.

First, please refer to Figures 2 to 5, the rotary lock piece (1) of the present invention is used for hooking a fastening member (2) to achieve the purpose of locking a horizontal sliding window structure (4). The rotary locking piece (1) includes at least:

a body (11) having a movable hole (111) thereon, and a pivoting portion (112) disposed adjacent to the movable hole (111), wherein the movable hole (111) and the pivoting portion ( 112) is through the body (11), the movable hole (111) can be inserted and toggled by a dial (not shown) to form the pivoting portion (112) In the embodiment, the pivoting portion (112) is a through hole, and the pivoting portion (112) is pivotally connected to a base (not shown). Fixed or locked to a window frame (not shown); in a preferred embodiment of the present invention, the body (11) is in an elliptical cylindrical shape to allow the movable hole (111) and the pivot The connecting portion (112) can form a linear arrangement to save space. The elliptical cylinder of the body (11) has a body front end (113) and a body tail end (114).

A hook portion (12) has an arc shape having a curvature, a radius of curvature and a curvature width to be hooked with the fastening member (2), the hook portion (12) having a hook a front end (123) and a hook end (124), the hook front end (123) extending from the body end (114) such that the hook end (124) is located at the front end (113) of the body Above, the hook end (124) of the hook portion (12) is at a distance from the front end (113) of the body; further, the hook portion (12) is integrally formed with the body (11).

a supporting portion (13) connecting the body (11) and the hook portion (12) to strengthen and support the hook portion (12) and the body (11). In the embodiment, the supporting portion (13) is a body and a vertical body (11) and the hook portion (12) may also be located between the body (11) and the hook portion (12); further, the support portion (13), the body (11) And the hook portion (12) is integrally formed. Furthermore, the support portion (13) is disposed at one of the center or the side of the hook portion (12); in a preferred embodiment of the present invention, the support portion (13) is disposed at the a central position of the hook portion (12), when the rotary locking piece (1) and the fastening member (2) are completely engaged with each other, the supporting portion (13) is capable of abutting against the fastening member (2) The effect of the limit of the cross-window structure (4) is achieved.

Furthermore, please refer to the embodiment of FIG. 3, the hook portion (12) has a first arc portion (121) and a second arc portion (122), the first arc portion (121) is from the A first node (P1) of one end of the hook end (124) extends toward the front end (123) of the hook portion, and the second arc portion (122) is from a second node (P2) of the front end (123) of the hook portion Extending toward the hook end (124), the first arc portion (121) and the second arc portion (122) intersect at a third node (P3), and the third node (P3) is located at the hook a portion (12) between the front end (123) of the hook and the tail end (124) of the hook; the first arc portion (121) has a first curvature (R1), and the second arc portion ( 122) has a second curvature (R2), which may be the same or different from the second curvature (R2). In a typical embodiment, the first curvature (R1) is smaller than the second curvature (R2), so the first arc portion (121) is compared to the second arc portion (122). An arc portion (121) is relatively flat, and the second arc portion (122) is relatively curved; the first arc portion (121) is relatively flat to enable the rotation as shown in FIGS. 4 and 5. When the locking piece (1) and the fastening member (2) are hooked to each other, the hook end (124) can easily protrude into the fastening member (2). Of course, the curvature of the hook portion (12) may also be gradually from the first node (P1) of the hook end (124) to the second node (P2) of the hook front end (123). Increasing, that is, the curvature at the first node (P1) is smaller than the curvature at the second node (P2), the curvature at the first node (P1) is the smallest and the curvature at the second node (P2) is The maximum is that when the rotating locking piece (1) and the fastening piece (2) are mutually hooked, the hook portion (12) can be from the hook end (124) to the front end of the hook ( 123) smoothly into the fastening member (2).

a side view of the rotary locking piece (1) in the embodiment of FIG. 3, a distance between a rotation center point (O) of the pivoting portion (112) and the first node (P1) is a first radius of curvature ( S1), the distance between the rotation center point (O) and the second node (P2) is a second radius of curvature (S2), and the first radius of curvature (S1) is greater than or equal to the second radius of curvature (S2) In a typical embodiment, the first radius of curvature (S1) is greater than the second radius of curvature (S2) such that the rotary locking tab (1) and the buckle are as shown in FIGS. 4 and 5. When the fitting (2) is hooked to each other, the hook end (124) can easily protrude into the fastening member (2). Of course, the radius of curvature of the hook portion (12) may also gradually decrease from the first node (P1) to the second node (P2), that is, the radius of curvature of the first node (P1). The system is larger than the radius of curvature of the second node (P2), the radius of curvature of the first node (P1) is the largest, and the radius of curvature of the second node (P2) is the smallest, which can form the rotating locking piece. (1) When the fastening member (2) is hooked to each other, the hook portion (12) can smoothly extend from the hook end (124) to the hook front end (123) into the fastening member ( 2). That is, the radius of curvature of the hook portion (12) is from the first radius of curvature (S1) of the hook end (124) to the second radius of curvature (S2) of the hook front end (123). Gradually become smaller.

Please refer to FIG. 6 and FIG. 7 together, the horizontal window structure (4) includes a first window frame (41) and a second window frame (42), and the rotation locking piece (1) is disposed on the The first window frame (41) and the fastening member (2) are disposed on the second window frame (42), the rotation locking piece (1) corresponding to the fastening member (2); when the rotation lock When the sheet (1) and the fastening member (2) are not hooked to each other, the first window frame (41) and the second window frame (42) have an unhooked distance (I), and when the rotation lock is When the sheet (1) and the fastening member (2) start to be mutually engaged, since the distance between the rotation center point (O) and the first node (P1) is the first radius of curvature (S1) is not less than the The distance (I) is hooked so that the hook end (124) easily protrudes into the fastening member (2). When the rotary locking piece (1) continues to rotate toward the fastening member (2) with the rotation center point (O), the first radius of curvature (S1) to the second radius of curvature (S2) gradually become smaller. Causing the rotating locking piece (1) and the fastening member (2) to generate a pressing force, thereby causing the first window frame (41) and the second window frame (42) to gradually approach; the rotating locking piece ( 1) continuously rotating the fastening center (O) toward the fastening member (2) until the second node (P2) contacts the fastening member (2), the first window frame (41) and the The second sash (42) is in full contact with the closure.

Please refer to FIG. 8 again for a schematic view of the structure of another embodiment of the present invention, wherein the support portion (13) is disposed on a side portion of the hook portion (12), and the hook portion (12) The hook end (124) has a first curvature width (W1) and the hook front end (123) has a second curvature width (W2), the first curvature width (W1) being less than or equal to the first a width of the second curvature (W2); in a typical embodiment, the first curvature width (W1) is smaller than the second curvature width (W2), and the rotating locking piece (1) and the fastening member (2) are mutually When hooked, the hook end (124) can easily protrude into the fastening member (2) because the first curvature width (W1) is small. Of course, the curvature width of the hook portion (12) may also gradually increase from the hook end (124) to the hook front end (123) when the rotating locking piece (1) is engaged with the buckle. When the pieces (2) are completely hooked to each other, the supporting portion (13) is abutted against the fastening member (2) to achieve the effect of the limit.

Referring to Figure 9, the creator further proposes a window locking device (3) disposed on the horizontal window structure (4), the door locking device (3) comprising at least one of the above rotations The locking piece (1) and the fastening component (2), wherein the rotating locking piece (1) is hooked with the fastening component (2) to achieve the purpose of locking the horizontal sliding window structure (4); The rotating locking piece (1) of the door and window locking device (3) is disposed inside the first window frame (41) and the fastening component (2) is disposed on the second window frame (42). Internally, the pivoting portion (112) of the rotating locking piece (1) is pivotally connected to a base (411), and the base (411) is fixed or locked to the first window frame (41).

It can be seen from the above description that the present invention has the following advantages compared with the prior art and the product:

The rotary locking piece and the door and window locking device of the present invention are mainly designed by the hardware design of the hook portion on the rotating locking piece to be hooked with the fastening member also disposed on the door and window locking device. The sliding window structure is locked by the tightly fitting locking effect, and the locking device of the sliding window structure is indeed simple and easy to operate, and has the advantages of safety and low manufacturing cost.

In summary, the rotary locking piece and the door and window locking device of the present invention can achieve the intended use effect by the above disclosed embodiments, and the creation has not been disclosed before the application. Meet the requirements and requirements of the Patent Law.提出Issuing an application for the creation of a patent in accordance with the law, and asking for a review, and granting a patent, it is really sensible.

However, the illustrations and descriptions disclosed above are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention; those who are familiar with the skill are otherwise characterized by the scope of the creation. Equivalent changes or modifications shall be considered as not departing from the design of this creation.

(traditional)
(A) ‧‧‧Front window frame
(B) ‧‧‧ Straight frame rod
(C) ‧ ‧ s shutter
(D) ‧‧‧ rear fan frame
(E)‧‧‧ Straight frame rod
(F)‧‧‧Cards
(G)‧‧‧Guide parts
(H) ‧ ‧ Guided action department
(this creation)
(1) ‧‧‧Rotary locks
(11) ‧‧‧ Ontology
(111)‧‧‧ Activity holes
(112) ‧‧‧ pivotal
(113)‧‧‧ body front end
(114)‧‧‧ Body end
(12)‧‧‧ hooks
(121)‧‧‧First arc
(122) ‧‧‧second arc
(123)‧‧‧ hook front end
(124)‧‧‧The end of the hook
(13) ‧ ‧ support
(2) ‧‧‧Fittings
(3)‧‧‧Door and window locks
(4) ‧‧‧ transverse window structure
(41)‧‧‧First window frame
(411)‧‧‧Base
(42)‧‧‧Second window frame
(I) ‧ ‧ unbridled distance
(O) ‧ ‧ rotating center point
(P1)‧‧‧ first node
(P2)‧‧‧second node
(P3) ‧‧‧ third node
(R1)‧‧‧First curvature
(R2)‧‧‧second curvature
(S1)‧‧‧First radius of curvature
(S2)‧‧‧second radius of curvature
(W1)‧‧‧First curvature width
(W2)‧‧‧second curvature width

Fig. 1 is a schematic view showing the structure of a conventional metal window opening and closing control device. Fig. 2 is a schematic view showing the structure of a preferred embodiment of the rotary locking piece. Fig. 3 is a view showing the structure of a preferred embodiment of the rotary locking piece. FIG. 4 is a side view of the present invention. FIG. 5 is a schematic view showing the rotation of the rotary locking piece and the fastening member of the present preferred embodiment. FIG. Schematic diagram of the locking piece and the fastening piece hooking each other (2) Fig. 6: The rotating locking piece of the present invention is a schematic diagram of the rotation locking piece and the fastening part of the preferred embodiment (3) Fig. 7: The rotation of the creation FIG. 8 is a schematic view showing the structure of the rotary locking piece of the present invention. FIG. 9 is a schematic view showing the structure of the second embodiment of the present invention. A schematic view of the structure of a preferred embodiment of the device

(1) ‧‧‧Rotary locks

(11) ‧‧‧ Ontology

(111)‧‧‧ Activity holes

(112) ‧‧‧ pivotal

(113)‧‧‧ body front end

(114)‧‧‧ Body end

(12)‧‧‧ hooks

(123)‧‧‧ hook front end

(124)‧‧‧The end of the hook

(13) ‧ ‧ support

Claims (23)

A rotating locking piece includes at least: a body (11) provided with a pivoting portion (112) and having a body front end (113) and a body tail end (114); a hook portion (12) is formed in an arc shape, the hook portion (12) has a hook front end (123) and a hook end end (124), and the hook front end (123) is bounded by the body tail end (114) Extendingly, the hook end (124) is located above the front end (113) of the body, and the hook end (124) is at a distance from the front end (113) of the body; and a support portion (13), The body (11) and the hook portion (12) are coupled. The rotary locking tab of claim 1, wherein the hook portion (12) has a curvature that gradually increases from the hook end (124) to the hook front end (123). The rotary locking piece according to claim 1, wherein the hook portion (12) has a first arc portion (121) and a second arc portion (122), wherein the first arc portion (121) is A first node (P1) of the hook end (124) extends toward the hook front end (123), and the second arc portion (122) is from a second node (P2) of the hook front end (123) Extending toward the hook end (124), the first arc (121) has a first curvature (R1), and the second arc (122) has a second curvature (R2), The first curvature (R1) and the second curvature (R2) may be the same or different. The rotary locking tab of claim 3, wherein the first curvature (R1) is less than the second curvature (R2). The rotary locking tab of claim 1, wherein the hook portion (12) has a radius of curvature that gradually changes from the hook end (124) to the hook front end (123). small. The rotary locking piece according to claim 1, wherein a distance between a rotation center point (O) of the pivoting portion (112) and a first node (P1) of the hook end (124) is a first radius of curvature (S1), the distance between the center point of rotation (O) and the second node (P2) of the front end of the hook portion (123) is a second radius of curvature (S2), the first radius of curvature ( S1) is greater than or equal to the second radius of curvature (S2). The rotary locking tab of claim 6, wherein the first radius of curvature (S1) is greater than the second radius of curvature (S2). The rotary locking piece according to claim 1, wherein the hook portion (12) has a curvature width which gradually increases from the hook end (124) to the hook front end (123). . The rotary locking piece of claim 1, wherein the hook end (124) has a first curvature width (W1) and the hook front end (123) has a second curvature width (W2), The first curvature width (W1) is less than or equal to the second curvature width (W2). The rotary locking tab of claim 9, wherein the first curvature width (W1) is smaller than the second curvature width (W2). The rotary locking tab of claim 1, wherein the support portion (13) is disposed at a center or a side of the hook portion (12). The rotary locking piece according to claim 1, wherein the hook portion (12) has a curvature and a radius of curvature which gradually increases from the hook end (124) to the front end (123) of the hook. The radius of curvature is gradually reduced from the hook end (124) to the hook front end (123). The rotary locking piece according to claim 1, wherein the hook portion (12) has a curvature and a curvature width, and the curvature is gradually formed from the hook end (124) to the hook front end (123). The grounding width is gradually increased from the hook end (124) to the hook front end (123). The rotary locking piece according to claim 1, wherein the hook portion (12) has a radius of curvature and a curvature width from the hook end (124) to the front end of the hook (123). Gradually, the curvature width gradually increases from the hook end (124) to the hook front end (123). The rotary locking piece according to claim 1, wherein the hook portion (12) has a curvature, a radius of curvature and a curvature width, the curvature being from the hook end (124) to the front end of the hook (123) gradually increasing, the radius of curvature gradually becoming smaller from the hook end (124) to the hook front end (123), the curvature width from the hook end (124) to the hook front end (123) gradually becomes larger. The rotary locking piece according to claim 1, wherein the hook portion (12) has a first arc portion (121) and a second arc portion (122), wherein the first arc portion (121) is A first node (P1) of the hook end (124) extends toward the hook front end (123), and the second arc portion (122) is from a second node (P2) of the hook front end (123) Extending toward the hook end (124), the first arc (121) has a first curvature (R1), and the second arc (122) has a second curvature (R2), The first curvature (R1) and the second curvature (R2) may be the same or different; the hook end (124) has a first curvature width (W1) and the hook front end (123) has a first A second curvature width (W2), the first curvature width (W1) being less than or equal to the second curvature width (W2). The rotary locking piece according to claim 1, wherein the hook portion (12) has a first arc portion (121) and a second arc portion (122), wherein the first arc portion (121) is A first node (P1) of the hook end (124) extends toward the hook front end (123), and the second arc portion (122) is from a second node (P2) of the hook front end (123) Extending toward the hook end (124), the first arc (121) has a first curvature (R1), and the second arc (122) has a second curvature (R2), The first curvature (R1) and the second curvature (R2) may be the same or different; the distance between the rotation center point (O) and the first node (P1) is a first radius of curvature (S1), The distance between the rotation center point (O) and the second node (P2) is a second radius of curvature (S2), which is greater than or equal to the second radius of curvature (S2). The rotary locking piece according to claim 1, wherein a distance between a rotation center point (O) of the pivoting portion (112) and a first node (P1) of the hook end (124) is a first radius of curvature (S1), the distance between the center point of rotation (O) and the second node (P2) of the front end of the hook portion (123) is a second radius of curvature (S2), the first radius of curvature ( S1) is greater than or equal to the second radius of curvature (S2); the hook end (124) has a first curvature width (W1) and the hook front end (123) has a second curvature width (W2), The first curvature width (W1) is less than or equal to the second curvature width (W2). The rotary locking piece according to claim 1, wherein the hook portion (12) has a first arc portion (121) and a second arc portion (122), wherein the first arc portion (121) is A first node (P1) of the hook end (124) extends toward the hook front end (123), and the second arc portion (122) is from a second node (P2) of the hook front end (123) Extending toward the hook end (124), the first arc (121) has a first curvature (R1), and the second arc (122) has a second curvature (R2), The first curvature (R1) and the second curvature (R2) may be the same or different; the distance between the rotation center point (O) and the first node (P1) is a first radius of curvature (S1), The distance between the rotation center point (O) and the second node (P2) is a second radius of curvature (S2), the first radius of curvature (S1) being greater than or equal to the second radius of curvature (S2); the hook portion The tail end (124) has a first curvature width (W1) and the hook front end (123) has a second curvature width (W2) which is less than or equal to the second curvature width ( W2). The rotary locking tab of claim 1, wherein the hook portion (12) is integrally formed with the body (11). The rotary lock piece according to claim 1, wherein the support portion (13) is integrally formed with the body (11) and the hook portion (12). A door and window lock device (3), comprising at least one rotary lock piece of claim 1 and a fastening member (2), wherein the rotary lock piece (1) is capable of being coupled with the buckle The fittings (2) are mutually hooked. A cross-window structure (4) comprising at least one door and window lock device of claim 22, a first window frame (41) and a second window frame (42), wherein the horizontal window structure (4) The rotary locking piece (1) is disposed inside the first window frame (41) and the fastening component (2) is disposed inside the second window frame (42), and the pivoting portion (112) is pivoted Connected to a base (411), the base (411) is fixed or locked to the first window frame (41).