Self-locking mechanism

Abstract

The utility model discloses a self-locking mechanism which comprises a base and a pendulum bob body, a left supporting plate and a right supporting plate are fixed to the left side and the right side of the base respectively, the top of the base is rotationally connected with a left deflector rod and a right deflector rod which are distributed left and right, the front end of the left deflector rod and the front end of the right deflector rod are provided with a first gear and a second gear respectively, and the first gear is meshed with the second gear. A left clamping plate and a right clamping plate are arranged at the rear ends of the left shifting rod and the right shifting rod respectively, located on the left side and the right side of the pendulum bob body respectively and used for clamping the pendulum bob body, and a torsional spring is installed between the left shifting rod and the left supporting plate; and the sliding block is in contact with the front upper end of the left driving lever and is used for driving the left driving lever to rotate. Through the torsion of the torsion spring, the left deflector rod and the right deflector rod can lock the pendulum bob body, the locking position is accurate, the locking force is large, when unlocking is needed, only the sliding block needs to move downwards, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of line-casting instruments, in particular to a self-locking mechanism applied to line-casting instruments. Background Art

[0002] A line marker, or ink marker, is an instrument that emits vertical or horizontal visible lasers and is used to mark horizontal or vertical lines on a target surface. When using a line marker, a locking mechanism must be used to prevent the instrument from being damaged during transportation. However, the existing locking mechanism of the line marker cannot lock the pendulum body to the center position, and the instrument is easily damaged during transportation. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide a self-locking mechanism.

[0004] The technical solution of the utility model is: a self-locking mechanism, which includes a base and a pendulum body, a left support plate and a right support plate are fixed on the left and right sides of the base respectively, the top of the base is rotatably connected with a left lever and a right lever distributed on the left and right sides, the front ends of the left lever and the right lever are respectively provided with a first gear and a second gear, the first gear is meshed with the second gear, the rear ends of the left lever and the right lever are respectively provided with a left clamping plate and a right clamping plate, the left clamping plate and the right clamping plate are respectively located on the left and right sides of the pendulum body, and the left clamping plate and the right clamping plate are used to clamp the pendulum body, and a torsion spring is installed between the left lever and the left support plate; it also includes a sliding block that can move up and down, the sliding block is in contact with the front upper end of the left lever and is used to drive the left lever to rotate.

[0005] Furthermore, the inner side of the front end of the sliding block has a first inclined surface, and the front upper end of the left lever has a second inclined surface in contact with the first inclined surface.

[0006] Furthermore, a push block which can move up and down is slidably connected to the left side of the shell of the line projection instrument, and the sliding block is fixed on the inner side of the push block.

[0007] Furthermore, the torsion force generated by the torsion spring drives the left lever to rotate right, the first gear rotates right, drives the second gear to rotate left, and the right lever rotates left, so that the left and right clamps clamp the pendulum body; when the slider moves downward, the slider pushes the left lever to rotate left, the left lever drives the right lever to rotate right, and the left and right clamps release the pendulum body.

[0008] The self-locking mechanism provided by the utility model has the beneficial effects that the left lever and the right lever can lock the pendulum body through the torsion of the torsion spring, the locking position is accurate, the locking force is strong, and when unlocking is required, only the slider needs to be moved downward, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0010] Figure 2 It is a cross-sectional schematic diagram of the line projection instrument;

[0011] Figure 3 It is a structural schematic diagram of the left lever of the utility model.

[0012] As shown in the figure: 1-base, 2-pendulum body, 3-left support plate, 4-right support plate, 5-left lever, 51-first gear, 52-left clamping plate, 53-second inclined plane, 6-right lever, 61-second gear, 62-right clamping plate, 7-torsion spring, 8-slider, 81-first inclined plane, 9-line projection instrument, 91-housing, 92-push block, 10-pendulum frame, 11-pendulum shaft. DETAILED DESCRIPTION

[0013] In order to more intuitively and completely understand the technical solution of the utility model, the following non-limiting feature description is now provided in conjunction with the accompanying drawings of the utility model:

[0014] like Figure 1 — Figure 3 As shown, a self-locking mechanism comprises a base 1 and a pendulum body 2, a left support plate 3 and a right support plate 4 are fixed to the left and right sides of the base 1 respectively, a left lever 5 and a right lever 6 are rotatably connected to the top of the base 1, the front ends of the left lever 5 and the right lever 6 respectively have a first gear 51 and a second gear 61, the first gear 51 is meshed with the second gear 61, the rear ends of the left lever 5 and the right lever 6 respectively have a left clamping plate 52 and a right clamping plate 62, the left clamping plate 52 and the right clamping plate 62 are respectively located on the left and right sides of the pendulum body 2, and the left clamping plate 52 and the right clamping plate 62 are used to clamp the pendulum body 2, and a torsion spring 7 is installed between the left lever 5 and the left support plate 3; a self-locking mechanism also comprises a slider 8 which can move up and down, the slider 8 contacts the front upper end of the left lever 5 and is used to drive the left lever 5 to rotate.

[0015] like Figure 1 , Figure 3 As shown, the front inner side of the slider 8 has a first inclined surface 81, and the front upper end of the left lever 5 has a second inclined surface 53 in contact with the first inclined surface 81. When the slider 8 continues to move downward, the first inclined surface 81 continues to contact with the second inclined surface 53, so that the left lever 5 rotates leftward.

[0016] like Figure 2 As shown, a push block 92 that can move up and down is slidably connected to the left side of the housing 91 of the line projection instrument 9, and the slide block 8 is fixed inside the push block 92. Push the push block 92 downward, and the push block 92 drives the slide block 8 to move downward.

[0017] During operation, the torsion force generated by the torsion spring 7 drives the left lever 5 to rotate right, the first gear 51 to rotate right, driving the second gear 61 to rotate left, and the right lever 6 to rotate left, so that the left clamping plate 52 and the right clamping plate 62 clamp the pendulum body 2; when the slider 8 moves downward, the slider 8 pushes the left lever 5 to rotate left, the left lever 5 drives the right lever 6 to rotate right, and the left clamping plate 52 and the right clamping plate 62 release the pendulum body 2.

[0018] A self-locking mechanism also includes a pendulum frame 10 , the left and right sides of the pendulum frame 10 are respectively fixed to the upper ends of the left support plate 3 and the right support plate 4 , and the upper end of the pendulum body 2 is connected to the pendulum frame 10 through a pendulum shaft 11 .

[0019] The utility model provides a self-locking mechanism, through the torsion of the torsion spring 7, the left lever 5 and the right lever 6 can lock the pendulum body 2, the locking position is accurate, the locking force is strong, when unlocking is needed, just move the slider 8 downward, it is easy to use.

[0020] Of course, the above are only preferred embodiments of the present invention, and the patent scope of the present invention is not limited thereto. All simple modifications and equivalent structural changes made using the description and drawings of the present invention should be included in the patent protection scope of the present invention.

Claims

1. A self-locking mechanism, comprising a base and a pendulum body, characterized in that: A left supporting plate and a right supporting plate are fixed on the left and right sides of the base respectively; a left lever and a right lever distributed on the left and right sides are rotatably connected to the top of the base; the front ends of the left lever and the right lever respectively have a first gear and a second gear, the first gear is meshed with the second gear; the rear ends of the left lever and the right lever respectively have a left clamping plate and a right clamping plate, the left clamping plate and the right clamping plate are respectively located on the left and right sides of the pendulum body, and the left clamping plate and the right clamping plate are used to clamp the pendulum body; a torsion spring is installed between the left lever and the left supporting plate; it also includes a sliding block that can move up and down, the sliding block contacts the front upper end of the left lever and is used to drive the left lever to rotate.

2. A self-locking mechanism according to claim 1, characterized in that: The front end inner side of the sliding block is provided with a first inclined surface, and the front upper end of the left lever is provided with a second inclined surface contacting with the first inclined surface.

3. A self-locking mechanism according to claim 1, characterized in that: A push block which can move up and down is slidably connected to the left side of the shell of the line projection instrument, and a sliding block is fixed on the inner side of the push block.

4. A self-locking mechanism according to claim 2, characterized in that: The torsion force generated by the torsion spring drives the left lever to rotate right, the first gear rotates right, drives the second gear to rotate left, and the right lever rotates left, so that the left and right clamps clamp the pendulum body; when the slider moves downward, the slider pushes the left lever to rotate left, the left lever drives the right lever to rotate right, and the left and right clamps release the pendulum body.

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