A door closer

Abstract

This utility model discloses a door latch including a connecting seat, a door latch rotatably connected to the connecting seat, and a latching seat for rotatably engaging or disengaging the door latch. The connecting seat has a transition hole, and one end of the door latch is rotatably connected to the connecting seat via a pivot and fitted into the transition hole of the connecting seat. The door latch has a mounting hole blocking portion and a mounting clearance notch at the end connected to the connecting seat. The connecting seat has at least one fixing hole corresponding to the blocking portion of the door latch. Rotation of the door latch relative to the connecting seat causes the mounting clearance notch to gradually expose the fixing holes, allowing screws to pass through the fixing holes and fix the connecting seat to the door panel or door frame. The mounting hole blocking portion of the door latch blocks the fixing holes at least when the door latch is engaged with the latching seat. This utility model door latch can effectively lock and provide security while preventing easy disassembly or damage.

Description

Technical Field

[0001] This utility model relates to the field of door fittings technology, and in particular to a door latch. Background Technology

[0002] In daily life, door latches are usually installed on doors or cabinets to make it easier to close them tightly. However, existing door latches are either glued on or have exposed mounting holes. Glue-glued latches are easily removed or damaged by the glue coming off, or the screws in the exposed mounting holes can be unscrewed, rendering the latch useless. Furthermore, the glue is difficult to control, easily overflowing, and the exposed mounting holes make the door unsightly. Utility Model Content

[0003] The purpose of this utility model is to provide a door latch that effectively locks and provides safety protection while preventing it from being easily disassembled or damaged. In addition, the door latch is also aesthetically pleasing, thus solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A door latch includes a connecting seat, a door latch rotatably connected to the connecting seat, and a latching seat for rotatably engaging or disengaging the door latch. The connecting seat has a transition hole, and one end of the door latch is rotatably connected to the connecting seat by being fitted into the transition hole of the connecting seat via a pivot. The door latch has a mounting hole blocking portion and a mounting clearance notch at the end connected to the connecting seat. The connecting seat has at least one fixing hole corresponding to the blocking portion of the door latch. By rotating the door latch relative to the connecting seat, the mounting clearance notch is exposed one by one to expose the fixing hole, allowing screws to pass through the fixing hole and fix the connecting seat to the door panel or door frame. The mounting hole blocking portion of the door latch blocks the fixing hole at least when the door latch is engaged with the latching seat.

[0006] Preferably, the installation clearance notch is one of a through hole, an inner groove, an arc-shaped surface, or an inclined surface.

[0007] Preferably, the adapter hole of the connecting seat has a raised frustum on one end face near the door fastener.

[0008] Furthermore, the width of the door fastener is equal to or slightly smaller than the width of the connecting seat.

[0009] Furthermore, the fastening seat includes a mounting base plate and a fastening plate disposed on the mounting base plate, with a slot formed between the fastening plate and the mounting base plate, and the end of the door fastener away from the connecting seat is rotatably inserted into the slot.

[0010] Furthermore, one end of the fastening plate is provided with an outwardly extending first locking plate, the first locking plate being provided with a first locking hole, and the side of the door fastener away from the connecting seat is provided with an outwardly extending second locking plate, the second locking plate being provided with a second locking hole. The first locking hole and the second locking hole overlap in the door fastener when it is inserted into the fastening groove so that the door fastener is locked with a lock.

[0011] Furthermore, the fastening seat includes a mounting base plate and a lock member disposed on the mounting base plate. The door fastener has a second slot on the side facing the lock member at the end away from the connecting seat. The second slot of the door fastener is rotatably inserted into the lock member. The lock member is locked by a combination dial or a key after the door fastener is inserted into the fastening seat or unlocked when the door fastener is disengaged from the fastening seat.

[0012] Preferably, the door fastener has stop blocks on both sides of the second slot opening.

[0013] Furthermore, the fastening seat includes a mounting base plate, a lock sleeve seat disposed on the mounting base plate, a lock body rotatably fitted in the lock sleeve seat, and a lock pin retractably disposed at the lower end of the lock body. A third slot is formed between the mounting base plate and the lock sleeve seat. The door fastener has a third lock hole at the end away from the connecting seat. When the end of the door fastener away from the connecting seat is rotatably inserted into the third slot, the third lock hole and the lock pin are in corresponding positions. The lock body is locked by rotating the combination dial or key to drive the lock pin to extend and insert into the third lock hole, or unlocked when the door fastener disengages from the fastening seat.

[0014] The beneficial effects of this utility model are as follows: By using the mounting hole blocking part and mounting clearance notch at one end of the door fastener, the mounting clearance notch gradually exposes the fixing hole as the door fastener rotates relative to the connecting seat. This allows the screw to pass through the fixing hole and fix the connecting seat to the door panel or door frame. The mounting hole blocking part of the door fastener blocks the fixing hole at least when the door fastener is engaged with the fastening seat. This effectively locks the fastener while providing safety protection, preventing easily detached or exposed fixing screws from being disassembled or damaged. Furthermore, the door fastener has an aesthetically pleasing appearance. Attached Figure Description

[0015] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0016] Figure 1 This is a schematic diagram of a door latch structure according to the present invention;

[0017] Figure 2 for Figure 1 Partial disassembly diagram;

[0018] Figure 3 for Figure 1 A schematic diagram showing the disassembly structure after removing the fastening seat;

[0019] Figure 4 This is a schematic diagram of the structure of the first embodiment of the fastening seat;

[0020] Figure 5 Schematic diagrams of four embodiments for avoiding the notch during the installation of door fasteners;

[0021] Figure 6 A schematic diagram showing the state in which the door fastener rotates relative to the connecting seat, allowing the installation clearance notch to expose the fixing holes one by one;

[0022] Figure 7 This is a schematic diagram of the structure of a second embodiment of the door latch of this utility model;

[0023] Figure 8 for Figure 7 Disassembly diagram;

[0024] Figure 9 This is a schematic diagram of the structure of the second embodiment 1 of the fastening seat;

[0025] Figure 10 This is a schematic diagram of the structure of the second embodiment of the fastening seat;

[0026] Figure 11 This is a schematic diagram of the third embodiment of the door latch of this utility model;

[0027] Figure 12 for Figure 11 Disassembly diagram;

[0028] Figure 13 This is a schematic diagram of the structure of the third embodiment 1 of the fastening seat;

[0029] Figure 14 This is a schematic diagram of the third embodiment 2 of the fastening seat. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be further described clearly and completely below in conjunction with the embodiments of this utility model. It should be noted that the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Example 1

[0033] like Figure 1-6 As shown, a door latch includes a connecting seat 1, a door latch 3 rotatably connected to the connecting seat, and a latching seat 2 for the door latch to be rotatably engaged or disengaged.

[0034] Among them, such as Figure 3 As shown, the connecting seat 1 includes a seat plate 11, with a transition hole 13 in the middle of the seat plate 11. One end of the door fastener 3 has a through hole 32. The rotating shaft 4 passes through the through hole 32 and is fitted into the transition hole 13 of the connecting seat 1, so that the door fastener 3 is rotatably connected to the connecting seat 1; preferably, as Figure 3 As shown, the adapter hole 13 of the connecting seat 1 has a raised truncated cone 14 on one end face near the door fastener. The raised truncated cone allows for less contact between the bottom surface of the door fastener 3 and the upper surface of the connecting seat 1, making the rotation of the door fastener smoother.

[0035] The door fastener 3 has a mounting hole blocking part 31 and a mounting clearance notch 5 at the end connected to the connecting seat, wherein the mounting clearance notch 5 can be as follows: Figure 3 The through hole 51 shown can also be Figure 5 The concave arc grooves in (a) and (b), and Figure 5 (c) curved surface or Figure 5 (d) is one type of slope, but it can also be other shapes of installation clearance notches; at the same time, such as Figure 3 The connecting seat 1 shown has at least one fixing hole 12 corresponding to the blocking part 31 of the door fastener 3. Figure 3 There are 3 fixing holes in the middle.

[0036] Specifically, in this embodiment, as follows Figure 4 The fastening seat 2 shown includes a mounting base plate 21 and a fastening plate 23 disposed on the mounting base plate. The mounting plate is provided with a second fixing hole 22 for fixing the fastening seat to the door or door frame with screws. A slot is formed between the fastening plate 21 and the mounting base plate 23, such as... Figure 1 The end 33 of the door fastener 3, away from the connecting seat, is rotatably inserted into the slot. Preferably, as shown... Figure 4 One end of the fastening plate 23 shown is provided with an outwardly extending first locking plate, and the first locking plate is provided with a first locking hole 231; as shown Figure 3As shown, the side of the door fastener 3 away from the connecting seat is provided with an extended second lock plate. The second lock plate is provided with a second lock hole 331. The first lock hole 231 and the second lock hole 331 overlap in the door fastener's latch groove so that the door fastener can be locked with a lock.

[0037] More preferably, the width of the door fastener 3 is equal to or slightly smaller than the width of the connector 1, so that the mounting hole blocking part can better block the fixing hole 12 of the connector.

[0038] Before sale, the connecting seat 1 and the door fastener 3 are rotatably connected together via a rotating shaft 4. After sale, during use, the door fastener 3 is rotated relative to the connecting seat 1 (e.g., ...). Figure 6 (a), 6(b) and 6(c) show) the installation clearance notch 5 to expose the fixing hole 12 one by one, then the screw passes through the exposed fixing hole 12 to fix the connecting seat 1 to the door panel or door frame, and finally fix the fastening seat 2 to the door or door frame according to the length of the door fastener, and finally the end 33 of the door fastener 3 away from the connecting seat is rotated and inserted into the slot, and the mounting hole blocking part of the door fastener blocks the fixing hole at least when the door fastener is fastened on the fastening seat.

[0039] Example 2

[0040] This embodiment is based on the connection between the connecting seat 1 and the door fastener 3 in Embodiment 1, but modifies the fastening method between the fastening seat 2 and the door fastener 3. Specifically, as follows: Figure 7-10 As shown, the fastening base 2 includes a mounting base plate 21 and a locking member 24 disposed on the mounting base plate. The door fastener 3 has a second slot 34 on the side facing the locking member at the end away from the connecting base. The second slot 34 of the door fastener 3 is rotatably inserted into the locking member 24. The locking member 24 is connected by means of... Figure 8 Password dial or such Figure 9 The lock 25 is locked when the key is inserted into the lock hole and the door fastener is engaged in the engagement seat, or it is unlocked when the door fastener is disengaged from the engagement seat. This embodiment can lock itself without the need for an additional lock body, compared to embodiment 1.

[0041] Better, such as Figure 8 The door fastener 3 shown is provided with stop blocks 34-1 on both sides of the slot 34 of the second slot. The stop blocks 34-1 can ensure that the door fastener 3 is disengaged from the lock when locked.

[0042] Better, such as Figure 10 As shown, the lock 25 is provided with a lock cover 251 to block the lock hole and prevent foreign objects from entering the lock hole, which would prevent the door latch from locking or unlocking.

[0043] Example 3

[0044] This embodiment is based on the connection between the connecting seat 1 and the door fastener 3 in Embodiment 1, but modifies the fastening method between the fastening seat 2 and the door fastener 3. Specifically, as follows: Figure 11-14 As shown, the fastening base 2 includes a mounting base 21, a lock sleeve seat 261 disposed on the mounting base, a lock body (263, 264, 265) rotatably fitted in the lock sleeve seat, and a lock pin 262 retractably disposed at the lower end of the lock body. A third slot is formed between the mounting base 21 and the lock sleeve seat. The door fastener 3 has a third lock hole 35 at the end away from the connecting seat. When the end of the door fastener 3 away from the connecting seat is rotatably inserted into the third slot, the third lock hole 35 and the lock pin 262 are in corresponding positions. The lock body (263, 264, 265) is locked by inserting a key through the combination dial (265) or the lock hole (263) or by touching the button (264) to rotate and drive the lock pin to extend and be inserted into the third lock hole, or unlocked when the door fastener is disengaged from the fastening base. This embodiment makes the fastening of the door fastener 3 and the fastening base 3 more secure.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A door latch, characterized in that, The device includes a connecting base, a door fastener rotatably connected to the connecting base, and a fastening seat for rotatably engaging or disengaging the door fastener. The connecting base has a transition hole, and one end of the door fastener is rotatably connected to the connecting base via a pivot and fitted into the transition hole of the connecting base. The door fastener has a mounting hole blocking portion and a mounting clearance notch at the end connected to the connecting base. The connecting base has at least one fixing hole corresponding to the blocking portion of the door fastener. By rotating the door fastener relative to the connecting base, the mounting clearance notch exposes the fixing holes one by one, allowing screws to pass through the fixing holes and fix the connecting base to the door panel or door frame. The mounting hole blocking portion of the door fastener blocks the fixing holes at least when the door fastener is engaged with the fastening seat.

2. A door latch according to claim 1, characterized in that, The installation clearance notch is one of the following: a through hole, an inner groove, an arc-shaped surface, or an inclined surface.

3. A door latch according to claim 1 or 2, characterized in that, The adapter hole of the connector has a raised frustum on one end face near the door fastener.

4. A door latch according to claim 1 or 2, characterized in that, The width of the door fastener is equal to or slightly smaller than the width of the connecting seat.

5. A door latch according to claim 1 or 2, characterized in that, The fastening seat includes a mounting base plate and a fastening plate disposed on the mounting base plate, with a slot formed between the fastening plate and the mounting base plate, and the end of the door fastener away from the connecting seat is rotatably inserted into the slot.

6. A door latch according to claim 5, characterized in that, One end of the fastening plate is provided with an extended first locking plate, and the first locking plate is provided with a first locking hole. The side of the door fastener away from the connecting seat is provided with an extended second locking plate, and the second locking plate is provided with a second locking hole. The first locking hole and the second locking hole overlap in the door fastener when it is inserted into the fastening groove so that the door fastener is locked with a lock.

7. A door latch according to claim 1 or 2, characterized in that, The latching seat includes a mounting base plate and a lock on the mounting base plate. The latch has a second slot on the side of the door latch facing the lock at the end away from the connecting seat. The second slot of the door latch is rotatably inserted into the lock. The lock is locked by a combination dial or a key when the door latch is inserted into the latching seat or when the door latch is disengaged from the latching seat.

8. A door latch according to claim 7, characterized in that, The door fastener has stop blocks on both sides of the second slot opening.

9. A door latch according to claim 1 or 2, characterized in that, The fastening base includes a mounting base plate, a lock sleeve seat disposed on the mounting base plate, a lock body rotatably fitted in the lock sleeve seat, and a lock pin retractably disposed at the lower end of the lock body. A third slot is formed between the mounting base plate and the lock sleeve seat. The door fastener has a third lock hole at the end away from the connecting base. When the end of the door fastener away from the connecting base is rotatably inserted into the third slot, the third lock hole and the lock pin are in corresponding positions. The lock body is locked by rotating the combination dial or key to drive the lock pin to extend and insert into the third lock hole, or unlocked when the door fastener disengages from the fastening base.

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