Three-point mechanical lock

Abstract

The utility model discloses a three-point type mechanical lock, and belongs to the field of mechanical locks. Comprising a central lock, an upper pull rod and a lower pull rod are arranged in the central lock, the end of the upper pull rod is connected with an upper lock body, and the end of the lower pull rod is connected with a lower lock body; the lower lock body comprises a lock shell, a spring bolt arranged on the lock shell, a lock opening plate limiting transverse movement of the spring bolt and a linkage mechanism driving the spring bolt to move. The linkage mechanism comprises a first sliding plate, a second sliding plate, a spring bolt reset structure and a spring bolt pushing structure, wherein the first sliding plate and the second sliding plate are arranged in the lock shell in a sliding mode, and the spring bolt reset structure and the spring bolt pushing structure are arranged between the first sliding plate and the second sliding plate. The anti-theft device has the beneficial effects that the anti-theft performance is more excellent, a three-point lock can better prevent illegal personnel from kicking and prying a door and other burglary behaviors, a two-point lock and a single-point lock are only provided with two lock points and one lock point, and the structure has slight insufficiency in the aspect of guaranteeing the protection performance.

Description

Technical Field

[0001] The utility model relates to a three-point mechanical lock, belonging to the field of mechanical locks. Background Art

[0002] Trailer RVs, with their high degree of freedom and comfort, are widely acclaimed in the current domestic market. Precisely for these reasons, consumers are increasingly interested in trailer RVs and are placing higher demands on their convenience and aesthetics during daily use. Three-point locks are key components of trailer RV doors. Most popular locks on the market are two-point or single-point locks. Single-point and two-point locks have weak tension at the top, bottom, or center of the door after tightening, while two-point and single-point locks only have two locking points and one locking point, making these structures somewhat insufficient in terms of security. Utility Model Content

[0003] The purpose of the present invention is to provide a three-point mechanical lock that can effectively solve the above-mentioned problems.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] It includes a central control lock, in which an upper pull rod and a lower pull rod are provided, the end of the upper pull rod is connected to the upper lock body, and the end of the lower pull rod is connected to the lower lock body; wherein, the lower lock body includes a lock shell, a lock tongue provided on the lock shell, a lock plate for limiting the lateral movement of the lock tongue, and a linkage mechanism for driving the lock tongue to move.

[0006] Furthermore: the linkage mechanism includes a first slide and a second slide slidably arranged in the lock housing, and a lock tongue resetting structure and a lock tongue pushing structure arranged between the first slide and the second slide;

[0007] The lock tongue pushing structure includes a rotating shaft arranged between the first slide plate and the second slide plate, an elastic member for controlling the rotation of the rotating shaft is arranged on the rotating shaft, and a control arm is also arranged on the rotating shaft; the middle part of the control arm is bent, and the middle part is rotatably arranged on the lock shell through the limit shaft, and the end is hinged on the lock tongue.

[0008] Furthermore: a sliding groove is provided at the end of the control arm, a fixing column is provided in the sliding groove, and the fixing column is fixed on the lock tongue.

[0009] Furthermore: the lock tongue resetting structure includes a mounting plate arranged at the end of the first slide plate, a spring is arranged on the mounting plate, and one end of the spring is fixed to the lock housing.

[0010] Furthermore: a limiting groove is provided in the middle of the first slide plate, a limiting column is slidably provided in the limiting groove, and the limiting column is fixed on the lock housing.

[0011] Furthermore: the central lock is provided with an inner pull module and an outer pull module; the outer pull module and the inner pull module are fixed to the central lock via a decorative cover.

[0012] The beneficial effects are:

[0013] This device has better anti-theft performance: the three-point lock can better prevent illegal persons from kicking and prying the door and other burglary behaviors, while the two-point lock and single-point lock are only equipped with two locking points and one locking point. Such a structure is slightly insufficient in ensuring protection performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and accompanying drawings.

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a parts diagram of the lower lock body of the utility model;

[0017] Figure 3 This is the internal structure diagram of the lower lock body of the utility model;

[0018] Figure 4 This is a schematic diagram of the lock tongue pushing structure of the utility model.

[0019] Description of reference numerals:

[0020] 1. Central locking; 2. Upper pull rod; 3. Lower pull rod; 4. Upper lock body; 5. Lower lock body; 6. Lock housing; 7. Lock tongue; 8. Lock plate; 9. Linkage mechanism; 10. First slide plate; 11. Second slide plate; 13. Lock tongue reset structure; 131. Mounting plate; 132. Spring; 133. Limiting groove; 134. Limiting column; 14. Lock tongue pushing structure; 141. Rotating shaft; 142. Elastic member; 143. Control arm; 144. Limiting shaft; 145. Slide groove. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] It should be noted that, in the description of the present invention, unless otherwise specified, “multiple” means two or more; the terms “upper”, “lower”, “left”, “right”, “inside”, “outside”, “front end”, “rear end”, “head”, “tail”, etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0024] At the same time, in the description of this utility model, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0025] See Figure 1-4 This is an embodiment of the three-point mechanical lock of the utility model.

[0026] It includes a central lock 1, in which an upper pull rod 2 and a lower pull rod 3 are provided. The end of the upper pull rod 2 is connected to an upper lock body 4, and the end of the lower pull rod 3 is connected to a lower lock body 5; wherein, the lower lock body 5 includes a lock shell 6, a lock tongue 7 arranged on the lock shell 6, a lock plate 8 for limiting the lateral movement of the lock tongue 7, and a linkage mechanism 9 for driving the lock tongue 7 to move.

[0027] On the basis of the existing central lock 1, an upper lock body 4 and a lower lock body 5 are arranged in linkage through an upper pull rod 2 and a lower pull rod 3. When in use, when the central lock 1 is locked, the upper pull rod 2 will drive the upper lock body 4 to lock, and the lower pull rod 3 will drive the lower lock body 5 to lock, forming a three-point mechanical lock. The three-point lock can better prevent illegal persons from kicking and prying the door and other burglary behaviors.

[0028] The upper lock body 4 and the lower lock body 5 of the device can be set to the same symmetrical structure. When in use, the locking is completed through the linkage mechanism 9;

[0029] The linkage mechanism 9 includes a first slide plate 10 and a second slide plate 11 slidably disposed in the lock housing 6 , and a lock tongue reset structure 13 and a lock tongue push structure 14 disposed between the first slide plate 10 and the second slide plate 11 ;

[0030] The first slide 10 and the second slide 11 are fixed to the upper pull rod 2 or the lower pull rod 3. When the upper pull rod 2 or the lower pull rod 3 moves, the first slide 10 and the second slide 11 will move up and down in the lock shell 6, and at the same time drive the lock tongue reset structure 13 and the lock tongue pushing structure 14 to work, allowing the lock tongue 7 to move laterally in the lock plate 8.

[0031] Among them, the lock tongue pushing structure 14 includes a rotating shaft 141 arranged between the first slide 10 and the second slide 11, an elastic member 142 is arranged on the rotating shaft 141 for controlling the rotation of the rotating shaft 141, and a control arm 143 is also arranged on the rotating shaft 141; the middle part of the control arm 143 is bent, and the middle part is rotatably set on the lock shell 6 through the limit shaft 144, and the end is hinged on the lock tongue 7.

[0032] When the first slide 10 and the second slide 11 move downward, the rotating shaft 141 rotates, driving the elastic member 142 to accumulate elastic potential energy, and at the same time, the rotating shaft 141 drives the control arm 143 to rotate; due to the setting of the limit shaft 144 in the middle part of the control arm 143, the end of the control arm 143 will rotate around the limit shaft 144, and then the end of the control arm 143 will drive the lock tongue 7 to move horizontally, completing the locking and unlocking operations.

[0033] A sliding groove 145 is provided at the end of the control arm 143 , and a fixing column is provided in the sliding groove 145 , and the fixing column is fixed on the lock tongue 7 .

[0034] The end of the control arm 143 is connected to the lock tongue 7 by a sliding groove 145 and a fixing column, which is a common method in the field, and the purpose is to ensure stable movement of the lock tongue 7.

[0035] When the lock tongue is reset, it needs to rely on the lock tongue reset structure 13, which includes a mounting plate 131 arranged at the end of the first slide 10, and a spring 132 is arranged on the mounting plate 131, and one end of the spring 132 is fixed to the lock housing 6.

[0036] When the first slide 10 and the second slide 11 move downward, the spring 132 will accumulate elastic potential energy like the elastic member 142. When the upper pull rod 2 or the lower pull rod 3 is relaxed, the spring 132 releases the elastic potential energy and pushes the first slide 10 and the second slide 11 upward. At this time, the lock tongue 7 is reset and the locking is completed.

[0037] The first slide 10 is provided with a through-limiting groove 133 in the middle, in which a limiting post 134 is slidably arranged, and the limiting post 134 is fixed to the lock housing 6. The limiting groove 133 and the limiting post 134 are provided to limit the distance that the first slide 10 and the second slide 11 can move up and down.

[0038] The elastic member 142 in the present device is a prior art in the art, and its main function is the same as that of the spring 132 .

[0039] The central lock 1 is provided with an inner pull module and an outer pull module; the outer pull module and the inner pull module are fixed to the central lock 1 through a decorative cover.

[0040] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. Three-point mechanical lock, characterized by: The central control lock (1) comprises an upper pull rod (2) and a lower pull rod (3), wherein the upper pull rod (2) is connected to an upper lock body (4) at its end, and the lower pull rod (3) is connected to a lower lock body (5) at its end; wherein the lower lock body (5) comprises a lock shell (6), a lock tongue (7) arranged on the lock shell (6), a lock plate (8) for limiting the lateral movement of the lock tongue (7), and a linkage mechanism (9) for driving the lock tongue (7) to move.

2. The three-point mechanical lock according to claim 1, characterized in that: The linkage mechanism (9) comprises a first slide plate (10) and a second slide plate (11) slidably arranged in the lock housing (6), and a lock tongue resetting structure (13) and a lock tongue pushing structure (14) arranged between the first slide plate (10) and the second slide plate (11); the lock tongue pushing structure (14) comprises a rotating shaft (141) arranged between the first slide plate (10) and the second slide plate (11), an elastic member (142) for controlling the rotation of the rotating shaft (141) is arranged on the rotating shaft (141), and a control arm (143) is also arranged on the rotating shaft (141); the middle part of the control arm (143) is bent, and the middle part is rotatably arranged on the lock housing (6) through a limiting shaft (144), and the end is hinged to the lock tongue (7).

3. The three-point mechanical lock according to claim 2, characterized in that: A sliding groove (145) is provided at the end of the control arm (143), a fixing column is provided in the sliding groove (145), and the fixing column is fixed on the locking tongue (7).

4. The three-point mechanical lock according to claim 3, characterized in that: The lock tongue reset structure (13) comprises a mounting plate (131) arranged at the end of the first slide plate (10), a spring (132) being arranged on the mounting plate (131), and one end of the spring (132) being fixed to the lock housing (6).

5. The three-point mechanical lock according to claim 4, characterized in that: A through-going limiting groove (133) is also provided in the middle of the first slide plate (10), a limiting post (134) is slidably provided in the limiting groove (133), and the limiting post (134) is fixed on the lock housing (6).

6. The three-point mechanical lock according to claim 1, characterized in that: The central lock (1) is provided with an inner pull module and an outer pull module; the outer pull module and the inner pull module are fixed to the central lock (1) via a decorative cover.

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