An inside-outward back lock

Abstract

This invention relates to the field of door and window technology, specifically to an inward-opening, inward-tilting back lock, comprising a sash fixing plate connected to the door / window sash profile, a rotating hole at the bottom of the sash fixing plate, and an elastic body above the rotating hole; a sash locking buckle with a rotating arm at its top, the rotating arm engaging with the rotating hole in the sash fixing plate to allow the rotating arm to rotate along the hole, the top positioning surface of the rotating arm contacting the elastic body within the sash fixing plate; a first connecting block on one side of the sash locking buckle, with a retaining strip on the inner side of the first connecting block; and a second connecting block on the other side of the sash locking buckle, with a gap between the second connecting block and the first connecting block. Compared with the prior art, the advantages of this invention are: after the door / window sash profile and the door / window frame profile automatically lock, the design includes a retaining groove and a retaining strip, which, when engaged, can resist wind pressure and prevent air and water leakage.

Description

Technical Field

[0001] This invention relates to the field of door and window technology, specifically to an inward-opening and inward-tilting back lock. Background Technology

[0002] like Figure 1 , 2 As shown, when existing door and window sash and frame profiles are closed, the closed side consists of a lock body, a pull rod, and a locking point. The locking point is activated by rotating the lock body through the handle, which in turn drives the pull rod, which in turn drives the locking point. However, the other side lacks a locking point. When the wind is strong and the wind pressure is high, this side may deform, causing the door or window to warp and allowing wind and rain to blow into the room. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an inward opening and inward tilting back lock that can automatically lock the door and window sash profiles after the doors and windows are opened and closed inward to resist wind pressure.

[0004] To achieve the above objectives, an inward-opening and inward-tilting back lock is designed, comprising: a sash-mounted fixing plate connected to the door / window sash profile; a rotating hole at the bottom of the sash-mounted fixing plate and an elastic body above the rotating hole; a sash-mounted latch with a rotating arm at its top, the rotating arm engaging with the rotating hole in the sash-mounted fixing plate to allow the rotating arm to rotate along the rotating hole; the top positioning surface of the rotating arm contacting the elastic body within the sash-mounted fixing plate; a first connecting block on one side of the sash-mounted latch with a retaining strip on its inner side; a second connecting block on the other side of the sash-mounted latch with a gap between it and the first connecting block, and a transition slope on its inner side; and a frame-mounted latch connected to the door / window frame profile, with a slot on one side that engages with the retaining strip on the sash-mounted latch.

[0005] The present invention also has the following preferred technical solutions:

[0006] 1. The side of the fixing plate on the sash is provided with obliquely arranged fixing holes, and fixing screws pass through the fixing holes to connect with the door and window sash profile.

[0007] 2. The lower part of the fan mounting plate is provided with a groove, which cooperates with the fan mounting buckle rotating arm. The groove is provided with a through rotating hole, which cooperates with the rotating hole of the fan mounting buckle rotating arm so that the fan mounting buckle can rotate along the rotating hole. The fan mounting plate is also provided with a slot for accommodating an elastic body. The slot protrudes towards the groove, and the elastic body applies a rebound force to the positioning surface at the top of the fan mounting buckle rotating arm.

[0008] 3. Limiting structures are provided on both sides of the groove to restrict the rotation of the rotating arm within a 90° range.

[0009] 4. The side of the latch on the frame is provided with an obliquely set fixing hole, and the fixing screw passes through the fixing hole to connect with the door and window frame profile.

[0010] 5. The top of the locking slot on the frame is provided with a locking point.

[0011] 6. The first connecting block has a notch at the bottom and an inward guide surface. The second connecting block also has a guide surface at the bottom of its inner side. The locking points and slots on the guide frame enter from the notch of the first connecting block and the gap between the first and second connecting blocks, and the slots cooperate with the locking strips to connect.

[0012] Compared with the prior art, the advantages of this invention are:

[0013] 1. When the door and window sashes are open, they open and close normally. After closing, they will automatically lock.

[0014] 2. When the door and window sashes tilt inward, they open and close normally, and will automatically lock after closing.

[0015] 3. After the door and window sash profiles and door and window frame profiles are automatically locked, there are slots and strips designed to lock them in place. Once locked, the slots and strips can resist wind pressure and prevent air and water leakage.

[0016] 4. After the door and window sash profiles are opened, the back lock is equipped with a spring plate, which prevents the locking point from sagging, making it convenient for the lock on the sash to align with the lock on the frame when closing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of existing technology;

[0018] Figure 2 This is a schematic diagram of the device of the present invention installed on existing technology;

[0019] Figure 3 This is an exploded view of the present invention;

[0020] Figure 4 This is a perspective view of the connection between the fan-mounted fixing plate and the fan-mounted locking buckle of the present invention;

[0021] Figure 5 This is a perspective view of the frame latch of the present invention;

[0022] Figure 6 This is another perspective view of the frame latch of the present invention;

[0023] Figure 7 This is a schematic diagram of the working principle of the elastomer of the present invention;

[0024] Figure 8 This is a schematic diagram of the casement opening of the door and window sash profile of the present invention;

[0025] Figure 9 This is a schematic diagram of the inverted opening of the door and window sash profile of the present invention;

[0026] Figure 10 This invention relates to the intention of the door and window sash profiles to begin closing in an inward tilted-in state;

[0027] Figure 11 This invention relates to the intention of closing the door and window sash profile in an inward tilting state during the middle of the closing process;

[0028] Figure 12 This invention aims to fully close the door and window sash profiles when they are tilted inwards.

[0029] The following are labels in the attached diagram: 1. Sash fixing plate; 2. Door / window sash profile; 3. Rotating hole; 4. Elastic body; 5. Sash latch; 6. Rotating arm; 7. Positioning surface; 8. First connecting block; 9. Locking strip; 10. Second connecting block; 11. Frame latch; 12. Door / window frame profile; 13. Slot; 14. Fixing hole; 15. Fixing screw; 16. Locking point; 17. Locking point; 18. Pull rod; 19. Lock body; 20. Handle. Detailed Implementation

[0030] The invention will be further described below with reference to the accompanying drawings. The structure and principle of the invention are very clear to those skilled in the art. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0031] like Figure 3 , 10 As shown, the present invention includes a sash fixing plate 1, which is connected to the door / window sash profile 2. The sash fixing plate 1 has a rotating hole 3 at its lower part and an elastic body 4 above the rotating hole 3. The sash fixing plate 1 has an obliquely arranged fixing hole 14 on its side, and a fixing screw 15 passes through the fixing hole 14 and is connected to the door / window sash profile 2.

[0032] It also includes a fan-mounted locking buckle 5, with a rotating arm 6 at its top. The rotating arm 6 engages with the rotating hole 3 of the fan-mounted fixing plate 1, allowing the rotating arm 6 to rotate along the rotating hole 3. Figure 3 , 7 As shown, the top positioning surface 7 of the rotating arm 6 contacts the elastic body 4 inside the upper fixing plate 1. Figure 4As shown, a first connecting block 8 is provided on one side of the fan-mounted latch 5. A retaining strip 9 is provided on the inner side of the first connecting block 8. The bottom of the first connecting block 8 has a notch and an inwardly extending guide surface. A second connecting block 10 is provided on the other side of the fan-mounted latch 5. A gap exists between the second connecting block 10 and the first connecting block 8, and the second connecting block 10 has a transition slope on its inner side. The bottom inner side of the second connecting block 10 also has a guide surface to guide the latching point 16 and the slot 13 of the latch 11 on the frame into the gap between the first connecting block 8 and the second connecting block 10, allowing the slot 13 to engage with the retaining strip 9.

[0033] like Figure 3 , 5 As shown in Figures 6, 8, and 11, the present invention also includes a frame latch 11, which is connected to the door and window frame profile 12. A slot 13 is provided on one side of the frame latch 11, which cooperates with the locking strip 9 on the sash latch 5. A locking point 16 is also provided at the top of the slot 13 of the frame latch 11. An obliquely oriented fixing hole 14 is provided on the side of the frame latch 11, through which a fixing screw 15 passes and connects to the door and window frame profile 12.

[0034] like Figure 4 As shown, the lower part of the fan mounting plate 1 has a groove that mates with the rotating arm 6 of the fan latch 5. Limiting structures are provided on both sides of the groove to restrict the rotation of the rotating arm 6 within a 90° range. A through rotating hole 3 is provided in the groove, which mates with the rotating hole 3 of the rotating arm 6 of the fan latch 5, so that the fan latch 5 can rotate along the rotating hole 3. The fan mounting plate 1 also has a slot for accommodating the elastic body 4. The slot protrudes towards the groove, and the elastic body 4 applies a rebound force to the positioning surface 7 at the top of the rotating arm 6 of the fan latch 5.

[0035] like Figure 8 , 9 As shown, when the door / window sash profile 2 opens, tilts inward, or rotates, the sash latch 5 can disengage from the slot 13 of the frame latch 11, thereby opening the door / window sash profile 2. When the door / window sash profile 2 tilts inward or rotates, because the top positioning surface 7 of the rotating arm 6 contacts the elastic body 4 inside the sash fixing plate 1, friction exists, so the sash latch 5 can maintain the rotation angle state when it is disengaged from the frame latch 11 and will not droop. Figure 10 , 1112. When the door and window sash profile 2 is tilted inward and the door needs to be closed, rotate the door and window sash profile 2 with the bottom of the door and window frame profile 12 as the rotation axis, so that the sash upper latch 5 is close to the frame upper latch 11. Through the guide surface of the inner bottom of the first connecting block 8 and the second connecting block 10 of the sash upper latch 5, guide the locking point 16 and the locking groove 13 of the frame upper latch 11 to enter from the notch of the first connecting block 8 and the gap between the first connecting block 8 and the second connecting block 10, and make the locking strip 9 lock into the locking groove 13, thereby completing the interlock between the sash upper latch 5 and the frame upper latch 11 to resist wind pressure.

[0036] like Figure 8 As shown, when the door and window sash profile 2 is in the casement state, the side of the door and window frame profile 12 rotates the door and window sash profile 2, so that the sash latch 5 is close to the frame latch 11. Through the transition slope of the second connecting block 10 on the inner side, the locking point 16 and the slot 13 of the frame latch 11 are guided to enter from the notch of the first connecting block 8 and the gap between the first connecting block 8 and the second connecting block 10, and the locking strip 9 is locked into the slot 13, thereby completing the interlocking of the sash latch 5 and the frame latch 11 to resist wind pressure.

[0037] The above description is merely a specific embodiment of the invention, but the scope of protection of the invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the invention, based on the technical solutions and novel concepts of the invention, should be covered within the scope of protection of the invention.

Claims

1. An inward-opening, inward-tilting back lock, characterized in that, include A sash fixing plate is provided, which is connected to the door and window sash profile. The lower part of the sash fixing plate is provided with a rotating hole, and an elastic body is provided above the rotating hole. The fan-mounted locking buckle has a rotating arm at its top, which is connected to a rotating hole in the fan-mounted fixing plate so that the rotating arm can rotate along the rotating hole. The top positioning surface of the rotating arm contacts an elastic body inside the fan-mounted fixing plate. A first connecting block is provided on one side of the fan-mounted locking buckle, and a retaining strip is provided on the inner side of the first connecting block. A second connecting block is provided on the other side of the fan-mounted locking buckle, and a gap is left between the second connecting block and the first connecting block. The second connecting block is provided with a transition slope on the inner side. The frame latch is connected to the door and window frame profile. A slot is provided on one side of the frame latch, which cooperates with the locking strip on the sash latch.

2. The inward-opening, inward-tilting back lock as described in claim 1, characterized in that, The side of the fixing plate on the sash is provided with obliquely set fixing holes, and fixing screws pass through the fixing holes to connect with the door and window sash profile.

3. The inward-opening, inward-tilting back lock as described in claim 1, characterized in that, The lower part of the fan mounting plate has a groove that mates with the fan mounting buckle rotating arm. The groove has a through rotating hole that mates with the rotating hole of the fan mounting buckle rotating arm so that the fan mounting buckle can rotate along the rotating hole. The fan mounting plate also has a slot for accommodating an elastic body. The slot protrudes towards the groove, and the elastic body applies a rebound force to the positioning surface at the top of the fan mounting buckle rotating arm.

4. The inward-opening, inward-tilting back lock as described in claim 3, characterized in that, The groove is provided with limiting structures on both sides to restrict the rotating arm from rotating within a 90° range.

5. The inward-opening, inward-tilting back lock as described in claim 1, characterized in that, The frame has a fixing hole on the side of the latch, and the fixing screw passes through the fixing hole to connect with the door and window frame profile.

6. The inward-opening, inward-tilting back lock as described in claim 1, characterized in that, The top of the locking slot on the frame is provided with a locking point.

7. The inward-opening, inward-tilting back lock as described in claim 6, characterized in that, The first connecting block has a notch at the bottom and an inward guide surface. The second connecting block also has a guide surface at its inner bottom. The locking points and slots on the guide frame enter from the notch of the first connecting block and the gap between the first and second connecting blocks, and the slots cooperate with the locking strips to connect.

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