Large crank lock tensioning latch body

Abstract

The utility model relates to the technical field of latches, and discloses a large crank lock tensioning latch which comprises a crank lock, an upper lock rod and a lower lock rod are arranged on the upper portion and the lower portion of the side edge of the crank lock respectively, a main connecting rod is rotationally connected into the crank lock in a sleeved mode, and the opposite ends of the upper lock rod and the lower lock rod are rotationally connected to the end, away from the crank lock, of the main connecting rod in a sleeved mode. The upper lock rod and the lower lock rod are driven by the crank to move, so that the supporting cylinder is driven to rotate, the movable guide groove is matched with the spring during rotation, the movable rod is pushed to move outwards, the upper lock rod and the lower lock rod are driven to rotate, and the upper lock rod and the lower lock rod are driven to rotate. When the latch body moves outwards, the latch plate is driven to enter the fixed lock sleeve for locking under the pushing of the branch link rod, so that the problem that the linkage structure is complicated and tedious when the existing latch body is used for locking a higher door body is solved, and the latch body is more convenient and faster to maintain.

Description

Technical Field

[0001] The utility model application relates to the technical field of latch bodies, in particular to a large crank handle lock that tightens a latch body. Background Art

[0002] The latch is a device used to fix the door leaf, usually made of a wooden stick or an iron stick. Its function is to be inserted into the door after it is closed to prevent the door from being pushed open from the outside. It is a simple but effective safety device and is widely used in various types of doors, especially double-leaf doors.

[0003] For many cabinets with a certain height, when the cabinet doors are closed, multiple fixed points are required to be locked at the same time. However, the existing latch body is generally unable to control the feeding of multiple latches at the same time when in use, or the locking is driven by a transmission structure such as a crank to control a belt. The structure is relatively complex and cumbersome, and it is also very inconvenient to maintain. Utility Model Content

[0004] In order to solve the problem that the linkage structure of the existing latch body is relatively complicated when used to lock a higher door body, the utility model provides a large crank lock to tighten the latch body to solve the above problem.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The large crank lock tensioning latch body comprises a crank lock, and an upper locking rod and a lower locking rod are respectively provided with an upper locking rod and a lower locking rod on the upper and lower sides of the crank lock, and a main connecting rod is rotatably sleeved inside the crank lock, and the opposite ends of the upper locking rod and the lower locking rod are rotatably sleeved on an end of the main connecting rod away from the crank lock. The upper locking rod and the lower locking rod are equidistantly rotatably connected with a supporting connecting rod through a bearing, and the other end of the supporting connecting rod is fixed with an inner sleeve, and the inner sleeve is rotatably sleeved inside a supporting cylinder through a bearing, and a fixed plate is fixed on the side of the supporting cylinder, and a movable rod is slidably inserted inside the inner sleeve, and a moving rod is symmetrically fixed inside the movable rod, and a moving guide groove cooperating with the moving rod is symmetrically opened inside the inner sleeve, and each of the movable rods extending to one end of the inner sleeve outside is fixed with a latch plate through a nut, and the latch plate is inserted into the fixed lock sleeve on the side, and a spring is fixed to one end of the movable rod and the inner sleeve, and a limiting groove cooperating with the moving rod is symmetrically opened inside each of the supporting cylinders.

[0007] Furthermore, the end of the main connecting rod away from the upper locking rod and the lower locking rod passes through the outside of the crank lock and is fixed with the crank, and the two ends of the main connecting rod are rotatably connected to the crank lock and the upper locking rod and the lower locking rod through bearings.

[0008] Furthermore, a groove cooperating with the supporting rod is formed inside each of the fixing plates, and fixing holes are formed at both ends of each of the fixing plates.

[0009] Furthermore, the outer surfaces of the movable rods on both sides of the latch plate are provided with threads, and a positioning plate is fixed inside the fixed lock sleeve on the side of the latch plate to limit the latch plate.

[0010] Furthermore, each of the latch plates is configured to be in a transversely placed "Z" shape, and the positioning plate and the interior of the fixed locking sleeve are configured to be symmetrically inclined with the latch plate away from the end of the movable rod.

[0011] Furthermore, each of the movable guide grooves is configured as a laterally placed hook shape with a width matching the diameter of the movable rod, and each group of two limit grooves is configured as a straight line shape matching the movable rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model discloses that the upper and lower locking rods are driven to move by the crank handle, thereby driving the support tube to rotate. When rotating, the movable guide groove cooperates with the spring to push the movable rod to move outward. At the same time, the latch plate is driven to enter the fixed lock sleeve for locking under the push of the supporting rod. This solves the problem that the linkage structure of the existing latch body is relatively complicated and cumbersome when used to lock a higher door body, and makes the latch body more convenient to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 is a front view schematic diagram of a latch body structure according to an embodiment of the present application;

[0016] Figure 2 yes Figure 1 A schematic back view of a partial structure of a latch body in the illustrated embodiment;

[0017] Figure 3 yes Figure 1 A schematic front view of a partial structure of a latch body in the illustrated embodiment;

[0018] Figure 4 yes Figure 1 An exploded schematic diagram of the local structure of the latch body in the illustrated embodiment.

[0019] The meanings of the reference numerals in the figure are as follows: 1. crank lock; 2. upper locking rod; 3. lower locking rod; 4. main connecting rod; 5. supporting connecting rod; 6. supporting tube; 7. fixed plate; 8. movable rod; 9. latch plate; 10. fixed lock sleeve; 11. positioning plate; 12. bearing; 13. inner sleeve; 14. moving rod; 15. moving guide groove; 16. spring; 17. limit groove. DETAILED DESCRIPTION

[0020] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Reference Figure 1 , Figure 2 , Figure 4 and Figure 4The large crank lock tensioning latch body comprises a crank lock 1, an upper locking rod 2 and a lower locking rod 3 are respectively arranged on the upper and lower sides of the crank lock 1, a main connecting rod 4 is rotatably sleeved inside the crank lock 1, and the end of the main connecting rod 4 away from the upper locking rod 2 and the lower locking rod 3 passes through the outside of the crank lock 1 and is fixed with a crank, and the two ends of the main connecting rod 4 are rotatably connected with the crank lock 1 and the upper locking rod 2 and the lower locking rod 3 respectively through bearings 12, and the opposite ends of the upper locking rod 2 and the lower locking rod 3 are both rotatably sleeved on the main connecting rod 4 away from the crank lock 1 On one end, the upper locking rod 2 and the lower locking rod 3 are equidistantly connected to the supporting rod 5 through the bearing 12, and the other end of the supporting rod 5 is fixed with an inner sleeve 13, and the inner sleeve 13 is rotatably sleeved inside the support tube 6 through the bearing 12, and a fixed plate 7 is fixed on the side of the support tube 6, each of which has a groove that matches the supporting rod 5, and each of the two ends of the fixed plate 7 has a fixing hole, and a movable rod 8 is slidably inserted inside the inner sleeve 13, and a movable rod 8 is symmetrically fixed inside the movable rod 8. The movable rod 14 and the inner sleeve 13 are symmetrically provided with movable guide grooves 15 that cooperate with the movable rod 14. Each movable guide groove 15 is set to a horizontally placed hook shape with a width that matches the diameter of the movable rod 14. One end of each movable rod 8 extending to the outside of the inner sleeve 13 is fixed with a latch plate 9 by a nut. The outer surfaces of the movable rods 8 on both sides of the latch plate 9 are provided with threads. A positioning plate 11 is fixed inside the fixed locking sleeve 10 on the side of the latch plate 9 for limiting the latch plate 9. Each latch plate 9 is set to a horizontally placed "Z" shape. The positioning plate 11 and the fixed locking sleeve 10 are set to be symmetrically inclined with the end of the latch plate 9 away from the movable rod 8. The side of the latch plate 9 is inserted into the fixed locking sleeve 10. A spring 16 is fixed to one end of the movable rod 8 and the inner sleeve 13. A limiting groove 17 that cooperates with the movable rod 14 is symmetrically opened inside each support tube 6. Each group of two limiting grooves 17 is set to a straight line type that cooperates with the movable rod 14.

[0022] Specifically, when in use, the main connecting rod 4 is controlled by the crank, so that the main connecting rod 4 drives the upper locking rod 2 and the lower locking rod 3 to move downward or upward synchronously. When moving downward, the supporting connecting rod 5 is driven to rotate downward, which can drive the inner sleeve 13 to rotate. The rotation of the inner sleeve 13 causes the moving rod 14 to move out of the bent end of the moving guide groove 15 and move into the straight inclined section. At this time, the moving guide groove 15 releases the limit of the moving rod 14. Under the push of the spring 16, the active rod 8 drives the latch plate 9 to move outward. While the supporting connecting rod 5 rotates downward, With the cooperation of circular motion, the latch plate 9 is driven to have a force in the horizontal direction, which can drive the latch plate 9 to be inserted into the fixed locking sleeve 10, and locked by the latch plate 9 and the fixed locking sleeve 10, open and rotate the upper locking rod 2 and the lower locking rod 3 upward, and drive the inner sleeve 13 to rotate in the opposite direction through the supporting rod 5. When the inner sleeve 13 rotates, the moving rod 14 rotates and, under the extrusion and push of the inclined section, drives the moving rod 14 and the movable rod 8 to move toward the inside of the inner sleeve 13, and continues to rotate to the bending end, and is limited by the bending end.

[0023] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0024] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. The large crank lock tightens the bolt body, characterized by: The invention comprises a crank lock (1), wherein an upper locking rod (2) and a lower locking rod (3) are respectively arranged on the upper and lower sides of the crank lock (1), a main connecting rod (4) is rotatably sleeved inside the crank lock (1), the opposite ends of the upper locking rod (2) and the lower locking rod (3) are both rotatably sleeved on the end of the main connecting rod (4) away from the crank lock (1), the upper locking rod (2) and the lower locking rod (3) are equidistantly rotatably connected to a supporting connecting rod (5) through a bearing (12), and an inner sleeve (13) is fixed to the other end of the supporting connecting rod (5), the inner sleeve (13) is rotatably sleeved inside a supporting tube (6) through a bearing (12), and a fixing plate (7) is fixed on the side of the supporting tube (6) ), a movable rod (8) is slidably inserted inside the inner sleeve (13), and a moving rod (14) is symmetrically fixed inside the movable rod (8), and a moving guide groove (15) cooperating with the moving rod (14) is symmetrically opened inside the inner sleeve (13), and one end of each movable rod (8) extending to the outside of the inner sleeve (13) is fixed with a latch plate (9) through a nut, and the side of the latch plate (9) is inserted inside the fixed lock sleeve (10), and a spring (16) is fixed to one end of the movable rod (8) and the inside of the inner sleeve (13), and a limit groove (17) cooperating with the moving rod (14) is symmetrically opened inside each support tube (6).

2. The large crank lock tensioning latch body according to claim 1, characterized in that: The end of the main connecting rod (4) away from the upper locking rod (2) and the lower locking rod (3) passes through the outside of the crank lock (1) and is fixed with the crank, and the two ends of the main connecting rod (4) are respectively rotatably connected to the crank lock (1) and the upper locking rod (2) and the lower locking rod (3) through bearings (12).

3. The large crank lock tensioning latch body according to claim 1, characterized in that: Each of the fixing plates (7) is provided with a groove inside thereof to match the supporting link (5), and each of the fixing plates (7) is provided with fixing holes at both ends.

4. The large crank lock tensioning latch body according to claim 1, characterized in that: The outer surfaces of the movable rods (8) on both sides of the latch plate (9) are both provided with threads, and a positioning plate (11) is fixed inside the fixed lock sleeve (10) on the side of the latch plate (9) for limiting the position of the latch plate (9).

5. The large crank lock tensioning latch body according to claim 4, characterized in that: Each of the latch plates (9) is arranged in a transverse "Z" shape, and the positioning plate (11) and the interior of the fixed lock sleeve (10) are arranged in a symmetrical inclined shape away from the end of the latch plate (9) away from the movable rod (8).

6. The large crank lock tensioning latch body according to claim 1, characterized in that: Each of the movable guide grooves (15) is configured as a laterally placed hook shape having a width matching the diameter of the movable rod (14), and each group of two limit grooves (17) is configured as a straight line shape matching the movable rod (14).

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