Locking mechanism for limiting the position of the knob
By designing a locking mechanism and utilizing the combination of meshing and springs, the problem of knob limiting was solved, achieving effective knob limiting and ensuring stable operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 刘海洪
- Filing Date
- 2025-11-06
- Publication Date
- 2026-06-09
AI Technical Summary
The existing technology lacks a locking structure to limit the rotation of the knob, which makes it impossible to effectively stop the knob from rotating further, affecting the normal operation of other components.
A locking mechanism is designed, comprising a housing, a cover plate, an upper limit plate, a lower limit plate, a third gear, a locking plate, a locking tongue, a spring, and a mounting block. Through meshing and the action of the spring, the mechanism prevents the knob from rotating clockwise or counterclockwise, thereby achieving the limiting function.
It effectively prevents the knob from continuing to rotate, ensuring the normal operation of other components connected to the knob, such as the lifting plate, preventing accidental adjustments, and ensuring stable operation of the equipment.
Smart Images
Figure CN224341825U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a locking mechanism for limiting the position of a knob. Background Technology
[0002] A knob can be rotated clockwise and counterclockwise to drive certain structures to achieve certain functions. In some cases, it is necessary to limit the knob to prevent it from continuing to rotate clockwise or counterclockwise. However, the existing technology lacks such a locking structure to limit the knob. Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a locking mechanism for limiting the position of a knob.
[0004] This utility model is implemented as follows: a locking mechanism for limiting the position of a knob includes a housing and a cover plate. The cavity formed by the housing and the cover plate is provided with an upper limit plate, a lower limit plate, a third gear, a locking plate, a locking tongue, a spring, and a mounting block.
[0005] Both the upper limit plate and the lower limit plate are fixedly connected to the housing.
[0006] The third gear is coaxial with and fixedly connected to the knob;
[0007] The locking plate is movably disposed between the upper limit plate and the lower limit plate. The left side of the locking plate is provided with a concave arc-shaped third rack, which meshes with the third gear. The right side of the locking plate is provided with a concave arc-shaped groove.
[0008] The left end of the latch is located in the groove, and the spring is sleeved on the right end of the latch;
[0009] The mounting block has a mounting groove, the right end of the locking tongue and the spring are both located in the mounting groove, the mounting block passes through the cover plate and is rotatably connected to the cover plate, and the end of the mounting block that protrudes from the cover plate is fixedly connected to a handle.
[0010] The locking mechanism of this invention can effectively prevent the knob from continuing to rotate clockwise or counterclockwise, ensuring the normal operation of other components connected to the knob. Attached Figure Description
[0011] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of the locking mechanism and knob assembled together according to an embodiment of the present invention.
[0013] Figure 2 yes Figure 1 A schematic diagram of its breakdown.
[0014] Figure 3 yes Figure 1 The diagram shows the cover being opened and the handle being moved to the bottom.
[0015] Figure 4 yes Figure 1 The diagram shows the cover being opened and the handle being moved to the top. Detailed Implementation
[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0017] like Figures 1-4 As shown, this utility model embodiment provides a locking mechanism for limiting the knob 51, including a housing 61 and a cover 62. The cavity formed by assembling the housing 61 and the cover 62 with a number of screws 611 is provided with an upper limit plate 63, a lower limit plate 64, a third gear 65, a locking plate 66, a locking tongue 67, a spring 68 and a mounting block 69.
[0018] Both the upper limit plate 66 and the lower limit plate 64 are fixedly connected to the housing 61;
[0019] The third gear 65 is coaxial with and fixedly connected to the knob 51;
[0020] The locking plate 66 is movably disposed between the upper limit plate 63 and the lower limit plate 64. The left side of the locking plate 66 is provided with a concave arc-shaped third rack 661, which meshes with the third gear 65. The right side of the locking plate 66 is provided with a concave arc-shaped groove 662.
[0021] The left end of the locking tongue 67 is located in the groove 662, and the spring 68 is sleeved on the right end of the locking tongue 67;
[0022] The mounting block 69 has a mounting groove 691. The right end of the locking tongue 67 and the spring 68 are both located in the mounting groove 691. The mounting block 69 passes through the cover 62 and is rotatably connected to the cover 62. One end of the mounting block 69 protruding from the cover 62 is fixedly connected to a handle 610.
[0023] like Figures 1-4As shown in the example, this embodiment demonstrates how rotating the knob clockwise lowers the lifting platform and rotating it counterclockwise raises it. In this scenario, the locking mechanism operates as follows:
[0024] (1) When it is necessary to lower the height of the lifting platform, first, manually move the handle 610 to the lowest position (e.g., Figure 3 (As shown), at this time, the handle 610 drives the locking tongue 67 to move upward through the mounting block 69. The locking tongue 67 drives the locking plate 66 to move to the upper limit plate 63, and the upper limit plate 63 blocks the locking plate 66. Then, the user turns the knob 41 clockwise by hand. The third gear 65 rotates clockwise with the knob 41. During the continuous meshing of the third gear 65 and the third rack 661, the third gear 65 exerts a downward force on the locking plate 66. The locking plate 66 transmits the force from the third gear 65 to the locking tongue 67, and the locking tongue 67 then transmits the force to the spring 68. The spring 68 is compressed after being subjected to the force. The elastic force generated by the compressed spring 68 acts on the locking tongue 67, so that the locking tongue 67 is always located in the groove 662 on the right side of the locking plate 66, ensuring that the locking tongue 67 always pushes the locking plate 66 against the upper limit plate 63. When the adjustment lifting plate is lowered to the required height, the handle 610 is then moved to the top by hand (e.g. Figure 4 As shown), at this time, the handle 610 drives the locking tongue 67 to move downward through the mounting block 69. The locking tongue 67 drives the locking plate 66 to move to the lower limit plate 64. The lower limit plate 64 blocks the locking tongue 67. When the user continues to turn the knob 41 clockwise, the locking plate 66 is subjected to a downward force by the third gear 65. Since the locking plate 66 is blocked by the lower limit plate 64, the lower limit plate 64 cannot continue to move downward, which causes the third gear 65 to be unable to rotate. The knob 51 also cannot be rotated, thereby achieving the purpose of limiting the knob 51, thus preventing the lifting plate from being lowered unexpectedly by external force and ensuring the normal operation of the lifting plate.
[0025] (2) When it is necessary to raise the height of the lifting platform, first, manually move the handle 610 to the top (e.g., Figure 4As shown), at this time, the handle 610 drives the locking tongue 67 to move downward through the mounting block 69. The locking tongue 67 drives the locking plate 66 to move to the lower limit plate 64, and the lower limit plate 64 blocks the locking tongue 67. Then, the user turns the knob 41 counterclockwise by hand. The third gear 65 meshes with the third rack 661. The third gear 65 generates an upward force on the locking plate 66. The locking plate 66 transmits the upward force to the locking tongue 67. The locking tongue 67 then transmits the force to the spring 68. The spring 68 is compressed after being subjected to the force. The elastic force generated by the compressed spring 68 acts on the locking tongue 67, so that the locking tongue 67 is always located in the groove 662 on the right side of the locking plate 66, ensuring that the locking tongue 67 always pushes the locking plate 66 against the lower limit plate 64. When the adjustment lifting plate rises to the required height, stop turning the knob 41 counterclockwise.
[0026] In this embodiment, after the lifting plate is adjusted to the required height, the locking mechanism can prevent the knob 51 from continuing to rotate clockwise, thereby keeping the lifting plate stably at the required height and preventing the lifting plate from being accidentally lowered by external force, thus ensuring the normal operation of the lifting plate.
[0027] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.
Claims
1. A locking mechanism for limiting the position of a knob, characterized in that, It includes a housing (61) and a lid (62). The cavity formed by the housing (61) and the lid (62) is provided with an upper limit plate (63), a lower limit plate (64), a third gear (65), a locking plate (66), a locking tongue (67), a spring (68), and a mounting block (69). The upper limit plate (63) and the lower limit plate (64) are both fixedly connected to the housing (61); The third gear (65) is coaxial with and fixedly connected to the knob (51); The locking piece (66) is movably disposed between the upper limit plate (63) and the lower limit plate (64). The left side of the locking piece (66) is provided with a concave arc-shaped third rack (661), which meshes with the third gear (65). The right side of the locking piece (66) is provided with a concave arc-shaped groove (662). The left end of the latch (67) is located in the groove (662), and the spring (68) is sleeved on the right end of the latch (67); The mounting block (69) has a mounting groove (691), the right end of the locking tongue (67) and the spring (68) are both located in the mounting groove (691), the mounting block (69) passes through the box cover (62) and is rotatably connected to the box cover (62), and one end of the mounting block (69) protruding from the box cover (62) is fixedly connected to a handle (610).