Locking device for a sliding door

Abstract

The utility model discloses a lock device for sliding door, including door frame, fixed mounting has telescopic pneumatic cylinder on the door frame top and telescopic pneumatic cylinder one end fixedly connected with positioning board, the positioning board bottom fixed mounting is in sliding door main part upper end one side, the door frame and sliding door main part front side junctions are provided with locking structure, the locking structure contains the lock panel of fixed mounting in the door frame front side, the lock panel inside is located the fixed mounting of positioning shaft at the door frame rebate, the positioning shaft outer wall rotatory mounting has the jointing plate, the jointing plate upper end fixed mounting has return spring and return spring upper end fixed connection in the door frame inside, the jointing plate one end fixed mounting has the jointing head and the jointing head one end jointing has the limit stopper, the locking structure top is provided with the limit structure, the limit stopper fixed mounting is on the sliding door main part outer wall, can realize the double limit of sliding door to carry out the auxiliary limit of sliding door.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, and in particular to a lock device for sliding doors. Background Technology

[0002] Sliding doors, also known as sliding gates, are door structures that open and close by sliding in a straight line parallel to the mounting surface. Unlike traditional swing doors that open by rotating, their core feature is that the door moves along a preset track during opening, without occupying extra space outwards or inwards. They are widely used in the automotive, rail transportation, construction, and home appliance industries.

[0003] Existing sliding doors require locking when closed. Most locking devices rely solely on a single latch and latch for locking. When the door needs to be opened and closed repeatedly, the latch and latch may become damaged, resulting in the sliding door being unable to close. Repairing these doors is also relatively difficult, time-consuming, and labor-intensive. Furthermore, these devices cannot provide auxiliary locking for the sliding door. To address these issues, a new locking device for sliding doors has been proposed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a locking device for sliding doors to solve the problems mentioned in the background art.

[0005] To solve the above problems, the following technical solution is provided: a locking device for a sliding door, including a door frame, a telescopic cylinder fixedly installed at the upper end of the door frame and a positioning plate fixedly connected to one end of the telescopic cylinder, the bottom of the positioning plate fixedly installed on one side of the upper end of the sliding door body, a locking structure provided at the connection between the door frame and the front side of the sliding door body, the locking structure including an unlocking panel fixedly installed on the front side of the door frame, a positioning shaft fixedly installed inside the unlocking panel at the door frame groove, a snap-fit ​​plate rotatably installed on the outer wall of the positioning shaft, a return spring fixedly installed at the upper end of the snap-fit ​​plate and the upper end of the return spring fixedly connected to the inside of the door frame, a snap-fit ​​connector fixedly installed at one end of the snap-fit ​​plate and a limit block snapped at one end of the snap-fit ​​connector, and a limit structure provided above the locking structure.

[0006] As a preferred embodiment of the above technical solution, the limiting block is fixedly installed on the outer wall of the sliding door body and a protective cover is fixedly provided on the outer side of the limiting block, and a lock cylinder groove is provided on the surface of the unlocking panel.

[0007] As a preferred embodiment of the above technical solution, both the card connector and the outer wall of the limiting card block are set in an inclined shape, and the upper and lower ends of the sliding door body are fixedly installed with sliders, which are slidably connected to the inner wall of the door frame.

[0008] As a preferred embodiment of the above technical solution, a limit block is symmetrically fixedly installed on the front side of the door frame, and two positioning blocks are symmetrically installed on the front side of the sliding door body, with one end of the positioning block being inserted into the limit block.

[0009] As a preferred embodiment of the above technical solution, the limiting structure includes a disc fixedly installed inside the front side of the door frame, a friction shaft fixedly installed on the outer wall of the disc, a limiting plate that rotates by friction on the outer wall of the friction shaft, a snap-fit ​​groove inside the limiting plate that is adapted to the size of the snap-fit ​​rod, and the snap-fit ​​rod being fixedly installed on the front side of the sliding door body.

[0010] As a preferred embodiment of the above technical solution, a rotating rod is fixedly installed on the outer wall of the limiting plate, the limiting plate is placed inside the limiting protrusion, and the size of the limiting protrusion is compatible with that of the limiting plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model device is equipped with a locking structure and a limiting structure. When the inclined surface of the limiting block at one end of the sliding door presses against the locking connector on the locking plate, the locking connector is compressed and rises, causing the locking plate to rotate along the positioning shaft and compress the return spring to deform. When the locking connector and the limiting block are fully aligned, they are locked under the action of the elastic force. To open, simply insert the key into the lock cylinder of the unlocking panel, align it with the bottom of the locking plate, and then turn the key to compress the return spring on the locking plate, causing the locking connector and the limiting block to be misaligned. When the locking structure is damaged, the limiting plate is rotated on the friction shaft by rotating the rod, causing the locking groove at one end of the limiting plate to accurately engage with the locking rod. This helps to provide auxiliary limiting for the sliding door and provides double limiting for the sliding door, avoiding problems such as the sliding door not closing properly due to damage to the locking structure, and improving the closing stability of the sliding door.

[0012] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the locking device for a sliding door according to the present invention; Figure 2 This is a schematic diagram of the unfolded structure of the locking device for a sliding door according to the present invention; Figure 3 for Figure 2 A partial, enlarged structural diagram; Figure 4 for Figure 3 A partial enlarged diagram of the split structure; Figure 5 for Figure 3 A magnified schematic diagram of the localized explosion structure.

[0014] In the diagram: 1. Door frame; 2. Sliding door body; 21. Slider; 3. Telescopic cylinder; 4. Positioning plate; 5. Locking structure; 51. Unlocking panel; 52. Protective cover; 53. Positioning shaft; 54. Snap-fit ​​plate; 55. Return spring; 56. Snap-fit ​​connector; 57. Limiting block; 6. Limiting structure; 61. Disc; 62. Friction shaft; 63. Limiting plate; 64. Rotating rod; 65. Limiting protrusion; 66. Snap-fit ​​groove; 67. Snap-fit ​​rod; 7. Limiting block; 71. Positioning block. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] like Figures 1 to 5 As shown, the locking device for a sliding door provided in this embodiment includes a door frame 1. A telescopic cylinder 3 is fixedly installed on the upper end of the door frame 1, and a positioning plate 4 is fixedly connected to one end of the telescopic cylinder 3. The bottom of the positioning plate 4 is fixedly installed on one side of the upper end of the sliding door body 2. A locking structure 5 is provided at the connection between the door frame 1 and the front side of the sliding door body 2. The locking structure 5 includes an unlocking panel 51 fixedly installed on the front side of the door frame 1. A positioning shaft 53 is fixedly installed inside the unlocking panel 51 at the groove of the door frame 1. A snap-fit ​​plate 54 is rotatably installed on the outer wall of the positioning shaft 53. A return spring 55 is fixedly installed on the upper end of the snap-fit ​​plate 54, and the upper end of the return spring 55 is fixedly connected to the inside of the door frame 1. A snap-fit ​​connector 56 is fixedly installed on one end of the snap-fit ​​plate 54, and a limit block 57 is snapped onto one end of the snap-fit ​​connector 56. A limit structure 6 is provided above the locking structure 5.

[0017] like Figures 3 to 4 As shown, the limiting block 57 is fixedly installed on the outer wall of the sliding door body 2, and a protective cover 52 is fixedly installed on the outer side of the limiting block 57. The surface of the unlocking panel 51 is provided with a lock cylinder groove. The locking connector 56 and the outer wall of the limiting block 57 are both set in a bevel shape. The upper and lower ends of the sliding door body 2 are fixedly installed with sliders 21, and the sliders 21 are slidably connected to the inner wall of the door frame 1. Limiting blocks 7 are symmetrically fixedly installed on the front side of the door frame 1. Two positioning blocks 71 are symmetrically installed on the front side of the sliding door body 2, and one end of the positioning block 71 is inserted into the limiting block 7.

[0018] The limiting block 57 presses the locking connector 56, thereby driving the locking plate 54 to rotate and rise along the positioning shaft 53. This causes the locking plate 54 to press the return spring 55 and deform it. When the locking connector 56 is fully aligned with the limiting block 57, it rebounds under the elastic force of the return spring 55, causing the locking connector 56 to lock and engage with the limiting block 57. When the sliding door moves, it uses two positioning blocks 71 to align and insert with the limiting block 7, thereby limiting the sliding door.

[0019] like Figure 5 As shown, the limiting structure 6 includes a disc 61 fixedly installed inside the front side of the door frame 1. A friction shaft 62 is fixedly installed on the outer wall of the disc 61. A limiting plate 63 is rubbed and rotated on the outer wall of the friction shaft 62. A snap-fit ​​groove 66 is opened inside the limiting plate 63. The snap-fit ​​groove 66 is adapted to the size of the snap-fit ​​rod 67. The snap-fit ​​rod 67 is fixedly installed on the front side of the sliding door body 2. A rotating rod 64 is fixedly installed on the outer wall of the limiting plate 63. The limiting plate 63 is placed inside the limiting protrusion 65, and the limiting protrusion 65 is adapted to the size of the limiting plate 63.

[0020] The sliding door moves to the edge of the door frame 1, so that the locking groove 66 on the limiting plate 63 is precisely aligned with the locking rod 67. The applicant has taken this into consideration, so there will be no positional deviation or other problems. At the same time, a limiting protrusion 65 is set to facilitate the support of the limiting plate 63. The limiting structure 6 plays an auxiliary locking role.

[0021] The working principle and process of this utility model are as follows: When the sliding door is closed, the sliding door on the positioning plate 4 is driven by the telescopic cylinder 3 to slide within the door frame 1 using the slider 21. This causes the inclined surface of the limiting block 57 at one end of the sliding door to press against the locking connector 56 on the locking plate 54, causing the locking connector 56 to be compressed and rise. This causes the locking plate 54 to rotate along the positioning shaft 53, compressing the return spring 55 and deforming it. When the locking connector 56 is fully aligned with the limiting block 57, it is locked under the action of the elastic force. To open, simply insert the key into the lock cylinder of the unlocking panel 51, align it with the bottom of the locking plate 54, and then turn the key to compress the return spring 55 on the locking plate 54, causing the locking connector 56 to be misaligned with the limiting block 57. When the sliding door is closed, the two outer positioning blocks 71 are aligned and engaged with the limiting blocks 7 on the door frame 1. When the locking structure 5 is damaged after long-term use, when the sliding door is closed and moved to the edge of the door frame 1, the limiting plate 63 is driven to rotate on the friction shaft 62 by the rotating rod 64, which causes the locking groove 66 at one end of the limiting plate 63 to accurately engage with the locking rod 67, which facilitates the auxiliary limiting of the sliding door and can also provide double limiting of the sliding door.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

Claims

1. A locking device for a sliding door, characterized in that, The system includes a door frame (1), on which a telescopic cylinder (3) is fixedly installed at the upper end and a positioning plate (4) is fixedly connected at one end. The bottom of the positioning plate (4) is fixedly installed on one side of the upper end of the sliding door body (2). A locking structure (5) is provided at the connection between the door frame (1) and the front side of the sliding door body (2). The locking structure (5) includes an unlocking panel (51) fixedly installed on the front side of the door frame (1). The interior of the unlocking panel (51) is located inside the door frame. A positioning shaft (53) is fixedly installed at the slot of the frame (1). A snap-fit ​​plate (54) is rotatably installed on the outer wall of the positioning shaft (53). A reset spring (55) is fixedly installed on the upper end of the snap-fit ​​plate (54) and the upper end of the reset spring (55) is fixedly connected to the inside of the door frame (1). A snap-fit ​​connector (56) is fixedly installed on one end of the snap-fit ​​plate (54) and a limit block (57) is snapped on one end of the snap-fit ​​connector (56). A limit structure (6) is provided above the locking structure (5).

2. The locking device for a sliding door according to claim 1, characterized in that, The limiting block (57) is fixedly installed on the outer wall of the sliding door body (2) and a protective cover (52) is fixedly installed on the outer side of the limiting block (57). The surface of the unlocking panel (51) is provided with a lock cylinder groove.

3. The locking device for a sliding door according to claim 2, characterized in that, The outer walls of the card connector (56) and the limiting card block (57) are both set in a bevel shape. The upper and lower ends of the sliding door body (2) are fixedly installed with sliders (21), and the sliders (21) are slidably connected to the inner wall of the door frame (1).

4. The locking device for a sliding door according to claim 1, characterized in that, The door frame (1) is symmetrically fixedly installed with a limiting block (7) on the front side, and the sliding door body (2) is symmetrically installed with two positioning blocks (71) on the front side, and one end of the positioning block (71) is inserted into the limiting block (7).

5. The locking device for a sliding door according to claim 1, characterized in that, The limiting structure (6) includes a disc (61) fixedly installed inside the front side of the door frame (1). A friction shaft (62) is fixedly installed on the outer wall of the disc (61). A limiting plate (63) is rubbed and rotated on the outer wall of the friction shaft (62). A snap-fit ​​groove (66) is provided inside the limiting plate (63). The snap-fit ​​groove (66) is adapted to the size of the snap-fit ​​rod (67). The snap-fit ​​rod (67) is fixedly installed on the front side of the sliding door body (2).

6. The locking device for a sliding door according to claim 5, characterized in that, A rotating rod (64) is fixedly installed on the outer wall of the limiting plate (63). The limiting plate (63) is placed inside the limiting protrusion (65), and the size of the limiting protrusion (65) is compatible with that of the limiting plate (63).

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