Lock cylinder tail rod of electronic lock

Abstract

The utility model relates to the technical field of locks, in particular to a lock cylinder tail rod of an electronic lock, which comprises a transmission rod, a connecting sleeve and a springback piece, the tail end of the transmission rod is connected with the head end of the connecting sleeve in a sliding mode, the springback piece is arranged between the transmission rod and the connecting sleeve, so that the length of the lock cylinder tail rod can be increased or decreased under the action of external force, the lock cylinder tail rod can have the telescopic function, the length of the lock cylinder tail rod can be freely changed, and the lock cylinder tail rod is convenient to use. And the lock cylinder is more convenient to mount.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, and specifically relates to a tail rod of a lock core of an electronic lock. Background Art

[0002] With the continuous development of science and technology, smart lock cores have become an important part of modern home security. In smart lock cores, the flat bar is a very important part. In other terms, the flat bar is also called the lock core tail bar or transmission rod. It has multiple functions and uses. The flat bar of the smart lock core refers to a flat metal rod in the lock core. It is located inside the lock core and can realize the opening and closing function of the lock by cooperating with the lock body. The main function of the flat bar is to rotate the torsional force to realize the opening and closing function of the lock. When in use, the flat bar of the smart lock core can realize the opening and closing function of the lock by cooperating with the lock body; when the flat bar is in the extended state of the lock core, it can match the lock groove of the lock body, thereby locking the doors and windows to ensure the safety of the doors and windows; and when the flat bar is in the retracted state, the lock core can realize the unlocking function, which is convenient for people to enter and exit the doors and windows.

[0003] The existing lock core tail rod, such as a Chinese patent for an automatic lock core rotating tail rod, announcement number: CN207892363U, consists of a transmission rod, a transmission component and a fixing screw. When in use, the rotating tail rod is connected to the lock core through the transmission component. In actual use, the lock core is installed in the door, and the thickness of the door is not uniform, and the length of the transmission rod, that is, the flat rod, is fixed. Especially in the face of thinner door panels, a longer flat rod may cause the door to be unable to close, posing a safety hazard. In addition, the longer flat rod is not convenient for opening and closing the door. Therefore, during installation, it is necessary to manually cut a part of the transmission rod to adapt to the thickness of the door. Cutting the transmission rod requires many professional tools, which will cause trouble to the installation of the lock core. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an electronic lock cylinder tail rod, which can freely change the length of the lock cylinder tail rod and make the installation of the lock cylinder more convenient.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electronic lock core tail rod, comprising a lock core tail rod including a transmission rod, a connecting sleeve and a rebound member; the tail end of the transmission rod is slidably connected to the head end of the connecting sleeve, and the rebound member is arranged between the transmission rod and the connecting sleeve, so that the length of the lock core tail rod can be increased or decreased under the action of external force.

[0006] Preferably, the interior of the connecting sleeve is a hollow structure; the resilient member is located on the inner side of the connecting sleeve; and the rear end portion of the transmission rod is at least partially disposed on the inner side of the connecting sleeve and is crimped with the resilient member.

[0007] Preferably, it also includes a retaining spring; the transmission rod is composed of a flat rod, a short shaft and a limiting protrusion arranged on the outer periphery of the tail end of the short shaft; the short shaft is at least partially arranged on the inner side of the connecting sleeve and the short shaft is crimped with the resilient member; a limiting groove is provided on the inner side of the connecting sleeve along its length direction; an upper ring groove connected to the limiting groove is provided on the outer periphery of the head end of the connecting sleeve; the retaining spring is arranged in the upper ring groove and is crimped with the limiting protrusion.

[0008] Preferably, it further comprises a partition; the partition is fixed in the connecting sleeve; the resilient member is arranged between the short shaft and the partition.

[0009] Preferably, the resilient member is a spring or a plastic foam or an air bag.

[0010] Preferably, the transmission rod only slides axially with the connecting sleeve; the size of the outer periphery of the head end of the transmission rod is adapted to the size of the head end port of the connecting sleeve, and the size of at least part of the outer periphery of the tail end of the transmission rod is larger than the size of the head end port of the connecting sleeve.

[0011] Preferably, the first end port of the connecting sleeve has a polygonal structure.

[0012] Preferably, the size of at least part of the outer circumference of the rear end portion of the transmission rod is matched with the size of the inner circumference of the connecting sleeve, and the inner circumference of the connecting sleeve is a polygonal structure.

[0013] Preferably, the short shaft is further provided with a receiving hole along its axis; and the resilient member is at least partially disposed in the receiving hole.

[0014] Preferably, the transmission rod is an integrally formed structure.

[0015] Compared with the prior art, the beneficial effects of the utility model are: by arranging a spring and a retaining spring between the transmission rod and the connecting sleeve, opening a limiting groove in the connecting sleeve, and arranging a limiting protrusion on the outer periphery of the transmission rod body, the purpose of the transmission rod only sliding axially with the connecting sleeve without slipping is achieved, and at the same time, the circumferential rotation of the transmission rod relative to the connecting sleeve can be limited to ensure the transmission of the torque in the lock, and finally the overall length of the lock core tail rod can be freely increased or decreased. The lock made using the lock core tail rod can adapt to door panels of different thicknesses without the need for professional cutting tools, making the installation of the lock more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the longitudinal cross section of the tail rod structure of the lock core;

[0017] Figure 2 It is a structural schematic diagram of the transmission rod of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the connecting sleeve of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the longitudinal cross section of the connecting sleeve of the utility model.

[0020] In the figure: 1 transmission rod, 11 flat rod, 12 short shaft, 13 limiting protrusion, 121 accommodating hole; 2 connecting sleeve, 21 limiting groove, 22 upper ring groove, 23 lower ring groove; 3 spring, 4 retaining spring, 5 partition. DETAILED DESCRIPTION

[0021] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0022] Specific embodiment 1: Please refer to Figure 1-4 An electronic lock cylinder tail rod is used for transmission or cooperation between a lock cylinder body and a lock body, comprising: a transmission rod 1, a connecting sleeve 2, a spring 3 and a retaining spring 4. The tail end of the transmission rod 1 is slidably connected to the head end of the connecting sleeve 2. The spring 3 and the retaining spring 4 are arranged between the transmission rod 1 and the connecting sleeve 2, so that the transmission rod 1 can axially reciprocate relative to the connecting sleeve 2. Such a design can freely increase or decrease the overall length of the lock cylinder tail rod. When in use, the head end of the transmission rod 1 matches the lock groove of the lock body, and the tail end of the connecting sleeve 2 is connected to the lock cylinder body. The opening and closing function of the lock can be realized through the cooperation between the lock cylinder body, the lock cylinder tail rod and the lock body. The lock made using the lock cylinder tail rod can adapt to door panels of different thicknesses, without the need for professional cutting tools, making the installation of the lock more convenient.

[0023] Specifically, the transmission rod 1 is composed of a flat rod 11, a short shaft 12 and two limiting protrusions 13 arranged on the outer periphery of the rear end of the short shaft 12. A receiving hole 121 is also opened at the axis of the short shaft 12; the two limiting protrusions 13 are symmetrically distributed around the axis of the short shaft 12; after assembly, the head end of the spring 3 is at least partially arranged in the receiving hole 121. It should be noted here that the receiving hole 121 can improve the stability of the overall structure of the lock core tail rod when the transmission rod 1 rebounds axially. In addition, the receiving hole 121 not only makes the transmission rod 1 lighter, but also reduces the production cost of the transmission rod 1; further, for the rigidity of the structure, the transmission rod 1 can be integrally formed.

[0024] The tail rod of the lock core further includes a partition plate 5; the connecting sleeve 2 is a tubular structure, and the partition plate 5 is fixedly arranged in the connecting sleeve 2 to separate the front and rear ends of the connecting sleeve 2, wherein the front end of the connecting sleeve 2 is a long sleeve, and the rear end of the connecting sleeve 2 is a short sleeve, and the outer periphery of the short sleeve is also provided with a lower ring groove 23 for connection; when in use, the short sleeve is connected to the lock core body, and the long sleeve is connected to the transmission rod 1;

[0025] Two limiting grooves 21 are provided inside the connecting sleeve 2 along its axis, and the two limiting grooves 21 are in a corresponding relationship with the two limiting protrusions 13. After assembly, the tail end of the short shaft 12 is at least partially slidably arranged inside the long sleeve, and the limiting protrusions 13 are at least partially slidably embedded in the limiting grooves 21 at the corresponding positions, so that the transmission rod 1 can only slide axially with the connecting sleeve 2 to ensure the transmission of the torque in the lock; the spring 3 is arranged inside the long sleeve, and at this time the spring 3 is pressed between the short shaft 12 and the partition 5;

[0026] Furthermore, in order to prevent the transmission rod 1 from slipping off the connecting sleeve 2 when the transmission rod 1 and the connecting sleeve 2 slide relative to each other, an upper annular groove 22 is opened on the outer periphery of the long sleeve, and the upper annular groove 22 is connected with the limiting groove 21. After assembly, the retaining spring 4 is arranged in the upper annular groove 22, and the limiting protrusion 13 is crimped with the retaining spring 4, so that the rear end of the transmission rod 1 is restricted, and the transmission rod 1 will not slip off the connecting sleeve 2 when the transmission rod 1 and the connecting sleeve 2 slide relative to each other.

[0027] In other embodiments, in order to allow the transmission rod 1 and the connecting sleeve 2 to rebound and slide relative to each other without the transmission rod 1 slipping off the connecting sleeve 2, the spring 3 can be fixedly connected to the transmission rod 1 and the partition 5, or the spring 3 can be fixedly connected to the transmission rod 1 and the inner wall of the connecting sleeve 2.

[0028] Furthermore, the connecting sleeve 2 and the partition plate 5 may be integrally formed.

[0029] Through the technical solution, by arranging a spring and a retaining spring between the transmission rod and the connecting sleeve, opening a limiting groove in the connecting sleeve, and arranging a limiting protrusion on the outer periphery of the transmission rod body, the purpose of the transmission rod only sliding axially with the connecting sleeve without slipping is achieved. At the same time, the circumferential rotation of the transmission rod relative to the connecting sleeve can be limited to ensure the transmission of the torque in the lock. Finally, the overall length of the lock core tail rod can be freely increased or decreased. The lock made using the lock core tail rod can adapt to door panels of different thicknesses without the need for professional cutting tools, making the installation of the lock more convenient.

[0030] Embodiment 2: In embodiment 1, spring 3 plays a rebound role. In this embodiment, while ensuring that the transmission rod only slides axially with the connecting sleeve without slipping, according to the characteristic that spring 3 can be compressed or released, those skilled in the art should understand that spring 3 can be replaced by a part or component with a rebound function, such as plastic foam, rubber, sponge, airbag, etc.

[0031] Embodiment 3: In embodiment 1, the cooperation among the retaining spring 4, the limiting protrusion, the limiting groove 21, and the upper ring groove 22 can not only make the transmission rod 1 slide axially only with the connecting sleeve 2, but also prevent the transmission rod 1 from slipping off the connecting sleeve 2, so as to ensure the stability of the structure; different from embodiment 1, the size of the outer periphery of the head end portion of the transmission rod 1 is adapted to the size of the head end port of the connecting sleeve 2, the size of the outer periphery of at least part of the tail end portion of the transmission rod 1 is larger than the size of the head end port of the connecting sleeve 2, and the transmission rod 1 only slides axially with the connecting sleeve 2; for example, the size of the head end port of the connecting sleeve 2 is adapted to the size of the flat bar 11 of the transmission rod 1, and the connecting sleeve 2 is adapted to the flat bar 11 of the transmission rod 1. The front end port of the connecting sleeve 2 is of a rectangular structure, and the size of the short axis 12 is larger than that of the flat rod 11, so that the transmission rod 1 can only slide axially with the connecting sleeve 2 and will not rotate circumferentially; for example, in order to limit the relative circumferential rotation of the transmission rod 1 and the connecting sleeve 2, the inner wall of the connecting sleeve 2 can be set to a non-circular structure such as a square structure or a polygonal structure, and the shape of the rear end of the transmission rod 1 also needs to be a square structure or a polygonal structure. Those skilled in the art should understand that the purpose of changing the shape of the connection between the transmission rod 1 and the connecting sleeve 2 to achieve circumferential limitation while the transmission rod 1 only slides axially with the connecting sleeve 2 should be within the scope defined by this application.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electronic lock cylinder tail rod, used for transmission or cooperation between the lock cylinder body and the lock body, characterized in that: The lock core tail rod comprises a transmission rod (1), a connecting sleeve (2) and a resilient member; the tail end of the transmission rod (1) is slidably connected to the head end of the connecting sleeve (2), and the resilient member is arranged between the transmission rod (1) and the connecting sleeve (2), so that the length of the lock core tail rod can be increased or decreased under the action of an external force.

2. The electronic lock cylinder tail rod according to claim 1, characterized in that: The interior of the connecting sleeve (2) is a hollow structure; the resilient member is located on the inner side of the connecting sleeve (2); and the rear end portion of the transmission rod (1) is at least partially located on the inner side of the connecting sleeve (2) and is crimped to the resilient member.

3. The electronic lock cylinder tail rod according to claim 2, characterized in that: The invention also comprises a retaining spring (4); the transmission rod (1) comprises a flat rod (11), a short shaft (12) and a limiting protrusion (13) arranged on the outer periphery of the rear end of the short shaft (12); the short shaft (12) is at least partially arranged on the inner side of the connecting sleeve (2) and the short shaft (12) is crimped with the resilient member; a limiting groove (21) is provided on the inner side of the connecting sleeve (2) along its length direction; an upper ring groove (22) is provided on the outer periphery of the front end of the connecting sleeve (2) and is communicated with the limiting groove (21); the retaining spring (4) is arranged in the upper ring groove (22) and is crimped with the limiting protrusion (13).

4. The electronic lock cylinder tail rod according to claim 3, characterized in that: It also includes a partition (5); the partition (5) is fixedly arranged in the connecting sleeve (2); and the resilient member is arranged between the short shaft (12) and the partition (5).

5. The electronic lock cylinder tail rod according to claim 1, characterized in that: The resilient member is a spring or a plastic foam or an air bag.

6. The electronic lock cylinder tail rod according to claim 1, characterized in that: The transmission rod (1) only slides axially with the connecting sleeve (2); the size of the outer periphery of the head end portion of the transmission rod (1) matches the size of the head end port of the connecting sleeve (2), and the size of the outer periphery of at least part of the tail end portion of the transmission rod (1) is larger than the size of the head end port of the connecting sleeve (2).

7. The electronic lock cylinder tail rod according to claim 6, characterized in that: The head end port of the connecting sleeve (2) is in a polygonal structure.

8. The electronic lock cylinder tail rod according to claim 6, characterized in that: The dimensions of at least part of the outer periphery of the rear end portion of the transmission rod (1) are adapted to the dimensions of the inner periphery of the connecting sleeve (2), and the inner periphery of the connecting sleeve (2) is in a polygonal structure.

9. The electronic lock cylinder tail rod according to claim 3, characterized in that: The short shaft (12) is also provided with a receiving hole (121) along its axis; the resilient member is at least partially disposed in the receiving hole (121).

10. The electronic lock cylinder tail rod according to claim 3, characterized in that: The transmission rod (1) is an integrally formed structure.

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