一种物理教学杠杆原理演示装置
By introducing a buffer and limiting structure consisting of a support block, an elastic pad, and a T-shaped plate into the physics teaching lever principle demonstration device, the problem of rapid tipping when the lever is unbalanced is solved, achieving safe and continuous teaching demonstrations and student observation effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI SCI TECH UNIV
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing physics teaching lever principle demonstration devices are prone to tipping over when the lever is unbalanced, causing the weights to fall rapidly, interrupting the teaching process, increasing maintenance costs, and interfering with students' observation and understanding.
A device comprising a stand, lever, support block, elastic pad, and T-shaped plate was designed. The elastic pad and spring buffer the lever's tilt angle, prevent the weight from falling, and maintain the continuity of the demonstration process.
It effectively prevents the weights from falling rapidly, ensures the orderly conduct of teaching, extends the life of the equipment, and facilitates students' observation of changes in force and lever arm during the process of lever imbalance.
Smart Images
Figure CN224519425U_ABST
Abstract
Claims
1. A physical teaching lever principle demonstration device, characterized in that, include: Frame (1); Lever (2), which is rotatably mounted on the upright (1); The support block (3) is rotatably mounted on the upright frame (1) and has the following features: A pair of first elastic pads (31) are respectively provided on the two sides of the upper surface of the support block (3), and each first elastic pad (31) is located below the rotation path of different lever arms of the lever (2); A pair of second elastic pads (32) are symmetrically arranged at the bottom of the support block (3), forming a limiting area between them; T-shaped plate (4) is fixed on the stand (1) and extends into the limiting area, and its two side flanges are respectively located on the downward turning path of the corresponding second elastic pad (32), and springs (41) are provided between the two sides of the T-shaped plate (4) and the corresponding second elastic pad (32). When the lever (2) is pressed down on one side, the lever (2) contacts the corresponding first buffer pad (31) and drives the support block (3) to rotate, compressing the spring (41) on the corresponding side to form a buffer; when the second buffer pad (32) contacts the T-shaped plate (4) wing plate, a rotation limit structure is formed.
2. The physical teaching lever principle demonstration device according to claim 1, characterized in that: The T-shaped plate (4) forms an movable gap between its two side flanges and the corresponding second elastic pad (32).
3. The physical teaching lever principle demonstration device according to claim 2, characterized in that: The rotation point of the support block (3) and the upright (1) is located 1-2 cm directly below the rotation point of the lever (2) and the upright (1).
4. The physical teaching lever principle demonstration device according to claim 3, characterized in that: The extension lines of the contact surfaces of the first elastic pad (31) and the second elastic pad (32) form an angle of 50-60°.
5. The physical teaching lever principle demonstration device according to claim 1, characterized in that: When the spring (41) is in its natural state, the upper surface of the support block (3) is parallel to the axial direction of the lever (2).
6. The physical teaching lever principle demonstration device according to claim 1, characterized in that: Two adjusting components (21) are symmetrically provided on the lever (2). The adjusting component (21) includes a sliding sleeve (210), a locking knob (211) and a hook (212). The sliding sleeve (210) is slidably sleeved on the lever (2). The locking knob (211) is threaded through the top of the sliding sleeve (210). The hook (212) is located at the bottom of the sliding sleeve (210).