An improved unlocking mechanism in a handle column

Abstract

The invention discloses an improved unlocking mechanism in a handle column, which relates to the field of locks, and mainly includes a stepping motor, a clutch A, a clutch assembly metal shell and a clutch B. By installing long and short gaskets in the clutch assembly metal shell, direct contact between the two clutches and the clutch assembly metal shell is avoided, thereby extending the service life of the product. The beneficial effects of the invention are: the clutch metal shell of the product is made of cheap metal materials such as zinc alloy or aluminum alloy, which greatly reduces the production cost of the product. The long and short gaskets are set to prevent the clutch assembly metal shell from directly contacting the clutch, avoiding deformation of the clutch shell due to contact force, resulting in a change in the matching relationship between the clutch and the shell, and hindering the forward and backward movement of the clutch, resulting in the phenomenon that the lock cannot be opened and closed normally, and the quality of the product is also guaranteed.

Description

Technical Field

[0001] The invention relates to the field of locks, and in particular to an improved unlocking mechanism in a handle column. Background Art

[0002] Fingerprint locks are popular because they bring great convenience to users. However, most of the existing fingerprint locks are quite different from traditional mechanical locks. They need to be installed and maintained by trained professionals, which makes the fingerprint locks have a high cost of use and brings obstacles to popularization. The emergence of an unlocking mechanism in the handle column reduces the cost of fingerprint locks and the technical requirements of installers, which brings convenience to the popularization of fingerprint locks. Its working principle: when opening the door, turn the handle, and the handle drives the clutch assembly to rotate. At this time, the clutch and the outer shell of the clutch assembly will be subjected to force. In order to ensure that the clutch assembly shell does not deform (if deformed, the matching relationship between the clutch and the shell changes, the forward and backward movement of the clutch is blocked, and it will cause the lock to be unable to open and close normally), the strength of the metal shell has higher requirements. In order to meet the strength requirements of the shell, stainless steel precision casting is generally used. However, stainless steel precision casting products have several disadvantages. One is the high cost; the other is that the product quality is difficult to detect and control. If there is a problem with the material or process, the strength still cannot meet the requirements. In order to reduce the production cost of this unlocking mechanism and improve product quality, it is necessary to improve its structure. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an improved unlocking mechanism in a handle column, which has the advantages of low production cost and safe and reliable product quality.

[0004] The object of the present invention is to achieve the following technical solutions: an improved unlocking mechanism in a handle column, mainly comprising a stepping motor, a clutch A, a clutch assembly metal shell and a clutch B; the output shaft of the stepping motor installed in the motor shell is connected with a cam and can drive it to rotate, the motor shell and the clutch assembly metal shell are fixedly connected together, the cam is connected with the clutch B so that the clutch B can move forward linearly and mesh with the clutch A, and a spring A is arranged at the meshing position of the clutch A and the clutch B for resetting the clutch B; the clutch assembly metal shell is composed of an upper cover and a lower cover connected, and a group of long gasket positioning grooves are respectively opened at corresponding positions in the upper and lower covers, and the two groups of long gasket positioning grooves are just located on both sides of the installation position of the clutch B, and the clutch B is separated from the clutch assembly metal shell by embedding and installing two long gaskets in the long gasket positioning grooves; a group of short gasket positioning grooves are respectively opened at corresponding positions in the upper and lower covers, and the two groups of short gasket positioning grooves are just located on both sides of the installation position of the clutch A, and the clutch A is separated from the clutch assembly metal shell by embedding and installing two short gaskets in the short gasket positioning grooves.

[0005] As a preferred technical solution, a group of short gasket positioning grooves A are opened on the upper cover, and a group of short gasket positioning grooves B are opened at the corresponding positions of the lower cover. The tops of two short gaskets with notches are embedded in the short gasket positioning grooves A, and the bottoms are embedded in the short gasket positioning grooves B, separating the two sides of the clutch A from the metal shell of the clutch assembly; a small protrusion is provided on the clutch A at the position corresponding to the notch, which is used to limit the rotation angle of the clutch A in the metal shell of the clutch assembly.

[0006] As a preferred technical solution, the clutch A head has a limiting groove for embedding and installation in the metal shell of the clutch assembly, and the metal shell of the clutch assembly is threadedly connected and fixed to the motor shell.

[0007] As a preferred technical solution, the metal shell of the clutch assembly is installed in the handle and connected to the handle through a key, so that when the handle is turned, the metal shell of the clutch assembly can be driven to rotate.

[0008] As a preferred technical solution, the long gasket and the short gasket are both made of stainless steel.

[0009] As a preferred technical solution, the clutch B is movably connected to a slide rod, on which a spring B is mounted. One end of the slide rod is pressed against a cam and elastically connected thereto. The elastic force of spring B is greater than the elastic force of spring A, so that when the cam rotates, it can push the slide rod and drive the clutch B to move forward in a straight line.

[0010] The beneficial effects of the present invention are as follows: the metal shell of the clutch of the product is made of cheap metal materials such as zinc alloy or aluminum alloy, which greatly reduces the production cost of the product. The metal shell of the clutch assembly is not in direct contact with the clutch by setting long and short gaskets, thereby avoiding deformation of the clutch shell due to contact force, resulting in a change in the matching relationship between the clutch and the shell, and hindering the forward and backward movement of the clutch, which will cause the lock to be unable to be opened and closed normally, and the quality of the product is also guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] Figure 2 for Figure 1 AA section view.

[0013] Figure 3 for Figure 1 BB cross-sectional view.

[0014] Figure 4 for Figure 1 CC cross-sectional view.

[0015] Figure 5It is a schematic diagram of the structure of the upper cover.

[0016] Figure 6 It is a schematic diagram of the structure of the lower cover.

[0017] Figure 7 Schematic diagram of the engagement structure of clutch A and B.

[0018] Figure 8 It is a structural explosion diagram of the present invention.

[0019] Explanation of the accompanying drawings: stepper motor 1, cam 2, clutch A3, limit groove 4, clutch assembly metal housing 5, motor housing 6, clutch B7, slide rod 8, spring A9, small protrusion 10, upper cover 12, lower cover 13, long gasket positioning groove 14, long gasket 15, short gasket positioning groove A16, short gasket positioning groove B17, short gasket 18, notch 19, spring B20. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and embodiments:

[0021] As shown in the figure, the unlocking improvement mechanism in the handle column mainly includes a stepper motor 1, a clutch A3, a clutch assembly metal shell 5 and a clutch B7; the output shaft of the stepper motor 1 installed in the motor shell 6 is connected with the cam 2 and can drive it to rotate, the motor shell 6 and the clutch assembly metal shell 5 are fixedly connected together, the clutch A3 head has a limit groove 4 for embedding and installing in the clutch assembly metal shell 5, and the clutch assembly metal shell 5 is threadedly connected and fixed with the motor shell 6. The clutch assembly metal shell 5 is installed in the handle and connected to the handle through a key, so that the clutch assembly metal shell 5 can be driven to rotate when the handle is turned.

[0022] The cam 2 is connected with the clutch B7 so that the clutch B7 can move forward in a straight line and mesh with the clutch A3. A spring A9 is provided at the meshing position of the clutch A3 and the clutch B7 for resetting the clutch B7. The metal housing 5 of the clutch assembly is composed of an upper cover 12 and a lower cover 13. A group of long gasket positioning grooves 14 are respectively opened at corresponding positions in the upper and lower covers 12 and 13. The two groups of long gasket positioning grooves 14 are located exactly on both sides of the installation position of the clutch B7. The clutch B7 is separated from the metal housing 5 of the clutch assembly by embedding and installing two long gaskets 15 in the long gasket positioning grooves 14. A group of short gasket positioning grooves are respectively opened at corresponding positions in the upper and lower covers 12 and 13. The two groups of short gasket positioning grooves are located exactly on both sides of the installation position of the clutch A3. The clutch A3 is separated from the metal housing 5 of the clutch assembly by embedding and installing two short gaskets 18 in the short gasket positioning grooves.

[0023] The working principle of this embodiment is as follows: the stepper motor 1 rotates, driving the cam 2 to rotate and push the clutch B7 to move forward and mesh with the clutch A3. Since the clutch A is separated by the short gasket 18 and does not directly contact the clutch assembly metal shell 5, and the clutch B7 is separated by the long gasket 15 and does not directly contact the clutch assembly metal shell 5, the clutch assembly metal shell 5 is not easily deformed by force when driven by the handle. The long gasket 15 and the short gasket 18 are both made of stainless steel, and the clutch assembly metal shell 5 is made of cheap metal materials such as zinc alloy or aluminum alloy. The force point is transferred from the clutch assembly metal shell 5 to the long gasket 15 and the short gasket 18.

[0024] The present invention provides another preferred embodiment, which improves the structure of the short gasket positioning groove and the short gasket 18. A group of short gasket positioning grooves A16 are opened on the upper cover 12, and a group of short gasket positioning grooves B17 are opened at the corresponding position of the lower cover 13. The tops of two short gaskets 18 with notches 19 are embedded in the short gasket positioning grooves A16, and the bottoms are embedded in the short gasket positioning grooves B17, so as to separate the two sides of the clutch A3 from the metal housing 5 of the clutch assembly; a small protrusion 10 is provided at the position corresponding to the notch 19 on the clutch A3, which is used to limit the rotation angle of the clutch A3 in the metal housing 5 of the clutch assembly, that is, the clutch A3 can only rotate within 0 to 180 degrees in the metal housing 5 of the clutch assembly, and the small protrusion 10 is stuck by the short gasket 18 when it rotates to the notch 19 position, and cannot continue to rotate.

[0025] The present invention provides another preferred embodiment, which improves the matching connection structure between the cam 2 and the clutch B7 from a hard connection to a soft connection. The clutch B7 is movably connected with a slide bar 8, and a spring B20 is mounted on the slide bar 8. One end of the slide bar 8 is pressed against the cam 2 and elastically connected therewith. The elastic force of the spring B20 is greater than the elastic force of the spring A9, so that when the cam 2 rotates, it can push the slide bar 8 and drive the clutch B7 to move forward in a straight line. Such an improvement makes the clutch B7 and the clutch A3 have greater elasticity when they are matched, and improves fault tolerance.

[0026] The working process of the present invention is as follows: when the fingerprint is effectively unlocked, the stepper motor 1 rotates, drives the cam 2 to rotate and pushes the slide bar 8 forward to the highest point of the cam 2, and the clutch B7 simultaneously pushes forward and engages with the clutch A3. Since the handle is key-connected with the metal shell 5 of the clutch assembly, the door can be opened by turning the handle at this time (since the clutch A is separated by the short gasket 18 and does not directly contact the metal shell 5 of the clutch assembly, and the clutch B7 is separated by the long gasket 15 and does not directly contact the metal shell 5 of the clutch assembly, the metal shell 5 of the clutch assembly is not easily deformed by force during use); after the door opening delay time is expired, the stepper motor 1 reverses, drives the cam 2 to rotate, and the slide bar 8 and the clutch B7 retreat to the initial position under the action of the spring A9. At this time, the slide bar 8 is located at the lowest point of the cam 2, and the clutch A3 is separated from the clutch B7, that is, a door opening action is completed. After the two clutches are separated, pressing down the handle is invalid, and the door is locked; after the handle is rotated in the opposite direction, due to the existence of the small protrusion 10, the clutch A3 is stuck by the notch 19 and cannot continue to rotate, and the door is locked immediately.

[0027] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. An improved unlocking mechanism in a handle column, characterized in that: The invention mainly comprises a stepper motor (1), a clutch A (3), a clutch assembly metal housing (5) and a clutch B (7); the output shaft of the stepper motor (1) installed in the motor housing (6) is connected with a cam (2) and can drive the cam to rotate; the motor housing (6) and the clutch assembly metal housing (5) are fixedly connected together; the cam (2) is connected with the clutch B (7) so that the clutch B (7) can move forward linearly and mesh with the clutch A (3); a spring A (9) is provided at the meshing position of the clutch A (3) and the clutch B (7) for resetting the clutch B (7); the clutch assembly metal housing (5) is composed of an upper cover (12) and a lower cover (13). The upper and lower covers (12, 13) are connected to each other, and a group of long gasket positioning grooves (14) are respectively opened at corresponding positions in the upper and lower covers (12, 13), and the two groups of long gasket positioning grooves (14) are just located on both sides of the installation position of the clutch B (7), and the clutch B (7) is separated from the metal shell (5) of the clutch assembly by embedding and installing two long gaskets (15) in the long gasket positioning grooves (14); and a group of short gasket positioning grooves are respectively opened at corresponding positions in the upper and lower covers (12, 13), and the two groups of short gasket positioning grooves are just located on both sides of the installation position of the clutch A (3), and the clutch A (3) is separated from the metal shell (5) of the clutch assembly by embedding and installing two short gaskets (18) in the short gasket positioning grooves.

2. The improved unlocking mechanism in the handle column according to claim 1, characterized in that: A group of short gasket positioning grooves A (16) are formed on the upper cover (12), and a group of short gasket positioning grooves B (17) are formed at corresponding positions on the lower cover (13). Two short gaskets (18) with notches (19) are embedded in the short gasket positioning grooves A (16) at the top and embedded in the short gasket positioning grooves B (17) at the bottom, so as to separate the two sides of the clutch A (3) from the metal housing (5) of the clutch assembly. A small protrusion (10) is provided at a position on the clutch A (3) corresponding to the notch (19) for limiting the rotation angle of the clutch A (3) in the metal housing (5) of the clutch assembly.

3. The improved unlocking mechanism in the handle column according to claim 1, characterized in that: The clutch A (3) has a limit groove (4) at its head for embedding and installation in a clutch assembly metal housing (5); the clutch assembly metal housing (5) is threadedly connected and fixed to a motor housing (6).

4. The improved unlocking mechanism in the handle column according to claim 1 or 3, characterized in that: The clutch assembly metal shell (5) is installed in the handle and connected to the handle through a key, so that when the handle is turned, the clutch assembly metal shell (5) can be driven to rotate.

5. The improved unlocking mechanism in the handle column according to claim 1, characterized in that: The long gasket (15) and the short gasket (18) are both made of stainless steel.

6. The improved unlocking mechanism in the handle column according to claim 1, characterized in that: The clutch B (7) is movably connected to a slide bar (8), and a spring B (20) is mounted on the slide bar (8). One end of the slide bar (8) is pressed against the cam (2) and elastically connected thereto. The elastic force of the spring B (20) is greater than the elastic force of the spring A (9), so that when the cam (2) rotates, it can push the slide bar (8) and drive the clutch B (7) to move forward in a straight line.

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