Locking device for door body

Abstract

The utility model relates to the technical field of door closers, and provides a locking device for a door body, which comprises a first connecting rod assembly and a second connecting rod assembly, and the first end of the first connecting rod assembly is rotatably connected with the first end of the second connecting rod assembly; one end of the first connecting rod assembly is fixedly connected with a limiting structural part, and a limiting part is arranged on the outer side of the limiting structural part; the second connecting rod assembly is provided with an elastic locking mechanism, and the elastic locking mechanism comprises a locking piece used for being matched with the limiting part in an inserted mode, a locking rod capable of sliding to a locking position along the second connecting rod assembly, and a first elastic piece arranged between the locking piece and the locking rod. The second connecting rod assembly is provided with a locking mechanism used for limiting the locking rod to the locking position or unlocking the locking rod. The locking device for the door body, provided by the utility model, can meet the requirements of different use scenes, and is good in user experience.

Description

Technical Field

[0001] The utility model belongs to the technical field of door closers, and in particular relates to a locking device for a door body. Background Art

[0002] Most current door closers are only used to achieve automatic closing of the door body. However, in some scenarios, the door often needs to be kept open for a long time and then restored to automatic closing. For example, the first-floor door of an apartment building is used for moving / renovation, and daily cargo transportation in a commercial building. The existing practice is basically to block the door panel with foreign objects such as bricks and stones, which provides a poor user experience. Utility Model Content

[0003] The purpose of the present utility model is to overcome at least one of the deficiencies of the above-mentioned prior art, and to provide a locking device for a door body, which can enable the door body to maintain a set opening angle, and at the same time enable the door body to be forced to close under a greater force in an emergency, with high safety and reliability and good user experience.

[0004] The technical solution of the utility model is: a locking device for a door body, comprising a first connecting rod assembly and a second connecting rod assembly, wherein the first end of the first connecting rod assembly and the first end of the second connecting rod assembly are rotatably connected;

[0005] One end of the first connecting rod assembly is fixedly connected to a limiting structural member, and a limiting portion is provided on an outer side of the limiting structural member;

[0006] The second connecting rod assembly is provided with an elastic locking mechanism, which includes a locking member for plugging and cooperating with the limiting portion, a locking rod that can slide along the second connecting rod assembly to a locking position, and a first elastic member provided between the locking member and the locking rod;

[0007] The second connecting rod assembly is provided with a locking mechanism for limiting the locking rod to a locking position or unlocking the locking rod.

[0008] Specifically, the first end of the first connecting rod assembly and the first end of the second connecting rod assembly are connected via a first rotating shaft, and the limiting structure is sleeved on the first rotating shaft and fixed relative to the first connecting rod.

[0009] Specifically, the limiting structure is cam-shaped and includes a base circle body and a cam portion integrally provided on the outer circumference of the base circle body, and the limiting portion is a limiting groove provided at one end of the cam portion away from the base circle body.

[0010] Specifically, the limiting groove is arc-shaped, and the end of the locking member is spherical.

[0011] Specifically, the second connecting rod assembly is provided with a sliding groove, which is arranged along the direction from the first end to the second end of the second connecting rod assembly. The locking member and the locking rod are both slidably connected to the sliding groove, and the front end of the locking member extends out of the sliding groove and abuts against the limiting structure; the first elastic member is arranged in the sliding groove, one end of the first elastic member abuts against the rear end of the locking member, and the rear end of the first elastic member abuts against the locking rod.

[0012] Specifically, the locking mechanism includes a rocker arm, one end of which is rotatably connected to the second connecting rod assembly, the locking rod has a locking slot, the rocker arm is provided with a locking portion, the rocker arm has a first swing position and a second swing position, when the rocker arm is set to the first swing position, the locking portion is located in the locking slot, limiting the locking rod from sliding toward the second end of the second connecting rod assembly; when the rocker arm is set to the second swing position, the locking portion moves out of the lock slot.

[0013] Specifically, the first end of the rocker arm is connected to the second connecting rod assembly through a second rotating shaft. When the rocker arm is set to the first swing position, the rocker arm and the locking rod are relatively perpendicular; when the rocker arm is set to the second swing position, the second end of the rocker arm swings toward the direction of the first end of the second connecting rod assembly.

[0014] Specifically, the second connecting rod assembly is fixedly provided with a limit stop portion. When the swing arm is set at the first swing position, a side of the swing arm close to the second end of the second connecting rod assembly abuts against the limit stop portion.

[0015] Specifically, the second end of the swing rod is connected to a driving component, and the driving component is used to control the second end of the swing rod to switch between a first swing position and a second swing position.

[0016] Specifically, a second elastic member is provided between the locking rod and the second connecting rod assembly, for causing the locking rod to slide toward the first end of the second connecting rod assembly.

[0017] The present invention provides a locking device for a door body, wherein one end of the first connecting rod assembly is fixedly connected to a limiting structure, the limiting structure moves with the first connecting rod assembly, and the first connecting rod assembly moves with the door body. A limiting portion is provided on the outer side of the limiting structure; the second connecting rod assembly is provided with an elastic locking mechanism, which includes a locking member for plugging and cooperating with the limiting portion, a locking rod that can slide along the second connecting rod assembly to a locked position, and a first elastic member provided between the locking member and the locking rod; the second connecting rod assembly is provided with a locking mechanism for limiting the locking rod to a locked position or unlocking the locking rod. In this way, when the locking mechanism locks the locking rod, it cannot slide in the direction of the second end of the second connecting rod assembly. When the door body is opened to the set angle, the first elastic member causes the locking member to be inserted into the limiting portion of the limiting structure. Under the action of the first elastic member, the locking member cooperates with the limiting portion to keep the door body at the set opening angle, so that the door body can remain in a normally open state. In an emergency, the door body can be forcibly rotated so that the limiting structure overcomes the action of the first elastic member, the limiting portion and the locking member are disengaged, and the door body can be closed, which has good safety and reliability. When the function of keeping the door body at the set opening angle is not needed, the locking mechanism can be used to unlock the locking rod, and the locking rod can slide in the direction of the second end of the second connecting rod assembly. The action force between the locking member and the limiting portion is small or no, and the door body can be opened and closed freely, meeting the needs of different usage scenarios and providing a good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a first stereoscopic schematic diagram of a locking device for a door body (the swing rod is located in a first swing position) provided by an embodiment of the utility model;

[0020] Figure 2 This is a three-dimensional cross-sectional schematic diagram of a locking device for a door provided by an embodiment of the present utility model;

[0021] Figure 3 This is a second three-dimensional diagram of a locking device for a door body (the swing rod is located in the first swing position) provided by an embodiment of the utility model;

[0022] Figure 4 This is a first stereoscopic schematic diagram of a locking device for a door body (the swing rod is located in the second swing position) provided by an embodiment of the utility model;

[0023] Figure 5 This is a second perspective schematic diagram of a locking device for a door body (the swing rod is located in a second swing position) provided by an embodiment of the utility model;

[0024] Figure 6 This is a partial enlarged schematic diagram of a locking device for a door body (the swing rod is in a first swing position) provided by an embodiment of the present utility model;

[0025] Figure 7 It is a three-dimensional schematic diagram of a rocker arm in a locking device for a door body provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] It should be noted that the terms "setting" and "connecting" should be understood in a broad sense. For example, it can be directly setting or connecting, or it can be indirectly setting or connecting through a central component or a central structure.

[0028] In addition, if there are terms such as "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientation or positional relationships in the embodiments of the present invention, these are based on the orientation or positional relationships shown in the drawings or the conventional placement state or usage state, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must it be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] The various specific technical features and embodiments described in the specific implementation methods can be combined in any suitable manner unless there is any contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features / embodiments in the present invention will not be described separately.

[0030] like Figures 1 to 3As shown, an embodiment of the present invention provides a locking device for a door, comprising a first connecting rod assembly 100 and a second connecting rod assembly 200. The first end of the first connecting rod assembly 100 and the first end of the second connecting rod assembly 200 are rotatably connected. The second end of the first connecting rod assembly 100 can be fixedly connected to the door, and the second end of the second connecting rod assembly 200 can be fixedly connected to the door frame. When the door is opened, the angle between the first connecting rod assembly 100 and the second connecting rod assembly 200 changes as the door rotates.

[0031] One end of the first connecting rod assembly 100 is fixedly connected to a limiting structure 110. The limiting structure 110 moves with the first connecting rod assembly 100, and the first connecting rod assembly 100 moves with the door body. A limiting portion 1101 is provided on the outer side of the limiting structure 110. The second connecting rod assembly 200 is provided with an elastic locking mechanism, which includes a locking member 210 for plugging and cooperating with the limiting portion 1101, a locking rod 220 that can slide along the second connecting rod assembly 200 to a locked position, and a first elastic member 230 disposed between the locking member 210 and the locking rod 220. The second connecting rod assembly 200 is provided with a locking mechanism for limiting the locking rod 220 in the locked position or unlocking the locking rod 220. In this way, when the locking mechanism locks the locking rod 220, it cannot slide toward the second end of the second connecting rod assembly 200. When the door body opens to a set angle, the first elastic member 230 causes the locking member 210 to be inserted into the limiting portion 1101 of the limiting structure 110. Under the action of the first elastic member 230, the locking member 210 cooperates with the limiting portion 1101 to keep the door body at the set opening angle, so that the door body can remain in a normally open state. In an emergency, the door body can be forcibly rotated so that the limiting structure 110 overcomes the action of the first elastic member 230, the limiting portion 1101 is disengaged from the locking member 210, and the door body can be closed, with good safety and reliability. When the function of keeping the door at the set opening angle is not needed, the locking mechanism can be used to unlock the locking rod 220, and the locking rod 220 can slide toward the second end of the second connecting rod assembly 200. The force between the locking member 210 and the limiting portion 1101 is small or there is no force, and the door can be opened and closed freely, meeting the needs of different usage scenarios and providing a good user experience.

[0032] Specifically, the first end of the first connecting rod assembly 100 and the first end of the second connecting rod assembly 200 are connected through the first rotating shaft 310. The limiting structure 110 is sleeved on the first rotating shaft 310 and fixed relative to the first connecting rod, and its structural reliability is good.

[0033] Specifically, the limiting structure 110 is a disc-shaped component, and its outer shape can be cam-shaped. The limiting structure 110 includes a base circle body 111 and a cam portion 112 integrally provided on the outer periphery of the base circle body 111. The limiting portion 1101 is a limiting groove provided at one end of the cam portion 112 away from the base circle body 111. When the door body rotates to the set opening angle, the limiting groove on the cam portion 112 is aligned with the locking member 210, and the locking member 210 is stuck in the limiting groove under the action of the first elastic member 230. The first elastic member 230 can be a metal spring. Specifically, the limiting groove is arc-shaped, and the end of the locking member 210 is spherical. Even if the locking member 210 is inserted into the limiting groove, the limiting structure 110 can continue to rotate.

[0034] Specifically, the second connecting rod assembly 200 is provided with a sliding groove 201, and the sliding groove 201 is arranged along the first end to the second end of the second connecting rod assembly 200. The locking member 210 and the locking rod 220 are both slidably connected to the sliding groove 201, and the front end of the locking member 210 extends out of the sliding groove 201 and abuts against the limiting structure 110; the first elastic member 230 is arranged in the sliding groove 201, and one end of the first elastic member 230 abuts against the rear end of the locking member 210, and the rear end of the first elastic member 230 abuts against the locking rod 220. The second connecting rod assembly 200 can be provided with a cover plate to cover the sliding groove 201.

[0035] Specifically, if Figures 5 to 7 As shown, the locking mechanism includes a swing rod 410, one end of which is rotatably connected to the second connecting rod assembly 200, a locking rod 220 having a locking groove 221, and a locking portion 411 provided on the swing rod 410. The swing rod 410 has a first swing position and a second swing position. When the swing rod 410 is set in the first swing position (refer to Figure 3 and Figure 6 As shown), the locking portion 411 is located in the locking groove 221, limiting the sliding of the locking rod 220 toward the second end of the second connecting rod assembly 200; when the swing rod 410 is set in the second swing position (reference Figure 4 and Figure 5 As shown), the locking portion 411 moves out of the lock groove 221, and the lock rod 220 can slide toward the second end of the second connecting rod assembly 200 when the force is applied. In this way, the relative force applied to the first elastic member 230 is reduced, and the force between the locking member 210 and the limiting groove is relatively reduced, so that the door body can be opened and closed freely.

[0036] Specifically, the first end of the swing arm 410 is connected to the second connecting rod assembly 200 via the second rotating shaft 320. When the swing arm 410 is set in the first swing position, the swing arm 410 and the lock rod 220 are relatively perpendicular. When the swing arm 410 is set in the second swing position, the second end of the swing arm 410 swings toward the first end of the second connecting rod assembly 200. Specifically, the second connecting rod assembly 200 is fixedly provided with a limit stop 500. When the swing arm 410 is set in the first swing position, the side of the swing arm 410 close to the second end of the second connecting rod assembly 200 abuts against the limit stop 500. When the lock rod 220 is subjected to a force directed toward the second end of the second connecting rod assembly 200, the force acts on the swing arm 410, causing the swing arm 410 to abut against the limit stop 500 in the direction of the second end of the second connecting rod assembly 200, forming a self-locking structure with good reliability.

[0037] Specifically, the second end of the rocker arm 410 is connected to a driving component 600, which is used to control the second end of the rocker arm 410 to switch between a first swing position and a second swing position. The driving component 600 can be a linear driving component such as an electromagnetic component, a linear motor, etc., which is simple and reliable.

[0038] Specifically, a second elastic member 240 is provided between the locking rod 220 and the second connecting rod assembly 200, which is used to make the locking rod 220 slide toward the first end of the second connecting rod assembly 200. When the locking rod 220 is in an unlocked state, the second elastic member 240 is used to make the locking rod 220 maintain an elastic force toward the first end of the second connecting rod assembly 200, and the door body can be opened and closed freely.

[0039] The utility model provides a locking device for a door body, which can enable the door body to maintain a set opening angle, and at the same time can force the door body to close under a large force in an emergency situation, with high safety and reliability and good user experience.

[0040] An embodiment of the present invention provides a locking device for a door body. When the locking mechanism locks the locking rod 220, it cannot slide toward the second end of the second connecting rod assembly 200. When the door body is opened to a set angle, the first elastic member 230 causes the locking member 210 to be inserted into the limiting portion 1101 of the limiting structure 110. Under the action of the first elastic member 230, the locking member 210 cooperates with the limiting portion 1101 to keep the door body at the set opening angle, so that the door body can remain in a normally open state. In an emergency, the door body can be forcibly rotated so that the limiting structure 110 overcomes the action of the first elastic member 230, the limiting portion 1101 is disengaged from the locking member 210, and the door body can be closed, with good safety and reliability. When the function of keeping the door at the set opening angle is not needed, the locking mechanism can be used to unlock the locking rod 220, and the locking rod 220 can slide toward the second end of the second connecting rod assembly 200. The force between the locking member 210 and the limiting portion 1101 is small or there is no force, and the door can be opened and closed freely, meeting the needs of different usage scenarios and providing a good user experience.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A locking device for a door body, characterized in that: The invention comprises a first connecting rod assembly and a second connecting rod assembly, wherein a first end of the first connecting rod assembly and a first end of the second connecting rod assembly are rotatably connected to each other; One end of the first connecting rod assembly is fixedly connected to a limiting structural member, and a limiting portion is provided on an outer side of the limiting structural member; The second connecting rod assembly is provided with an elastic locking mechanism, which includes a locking member for plugging and cooperating with the limiting portion, a locking rod that can slide along the second connecting rod assembly to a locking position, and a first elastic member provided between the locking member and the locking rod; The second connecting rod assembly is provided with a locking mechanism for limiting the locking rod to a locking position or unlocking the locking rod.

2. A locking device for a door according to claim 1, characterized in that: The first end of the first connecting rod assembly and the first end of the second connecting rod assembly are connected via a first rotating shaft, and the limiting structure is sleeved on the first rotating shaft and fixed relative to the first connecting rod.

3. A locking device for a door according to claim 2, characterized in that: The limiting structure is cam-shaped and includes a base circle body and a cam portion integrally arranged on the outer circumference of the base circle body. The limiting portion is a limiting groove arranged at one end of the cam portion away from the base circle body.

4. A locking device for a door according to claim 3, characterized in that: The limiting groove is arc-shaped, and the end of the locking piece is spherical.

5. A locking device for a door according to claim 1, characterized in that: The second connecting rod assembly is provided with a sliding groove, which is arranged along the direction from the first end to the second end of the second connecting rod assembly. The locking member and the locking rod are both slidably connected to the sliding groove, and the front end of the locking member extends out of the sliding groove and abuts against the limiting structure; the first elastic member is arranged in the sliding groove, one end of the first elastic member abuts against the rear end of the locking member, and the rear end of the first elastic member abuts against the locking rod.

6. A locking device for a door according to claim 5, characterized in that: The locking mechanism includes a rocker arm, one end of which is rotatably connected to the second connecting rod assembly, the locking rod has a locking groove, and the rocker arm is provided with a locking portion. The rocker arm has a first swing position and a second swing position. When the rocker arm is set to the first swing position, the locking portion is located in the locking groove, restricting the locking rod from sliding toward the second end of the second connecting rod assembly; when the rocker arm is set to the second swing position, the locking portion moves out of the lock groove.

7. A locking device for a door according to claim 6, characterized in that: The first end of the rocker arm is connected to the second connecting rod assembly through a second rotating shaft. When the rocker arm is set in the first swing position, the rocker arm and the locking rod are relatively perpendicular. When the rocker arm is set in the second swing position, the second end of the rocker arm swings toward the first end of the second connecting rod assembly.

8. A locking device for a door according to claim 6, characterized in that: The second connecting rod assembly is fixedly provided with a limit stop portion. When the swing arm is set at the first swing position, a side of the swing arm close to the second end of the second connecting rod assembly abuts against the limit stop portion.

9. A locking device for a door according to claim 6, characterized in that: The second end of the swing rod is connected to a driving component, and the driving component is used to control the second end of the swing rod to switch between a first swing position and a second swing position.

10. A locking device for a door according to claim 6, characterized in that: A second elastic member is provided between the locking rod and the second connecting rod assembly, for causing the locking rod to slide toward the first end of the second connecting rod assembly.

Images