Locking device, telescopic rod and mower comprising the locking device

Patent metadata

Field	Value
Publication number	US-9648805-B2
Application number	US-201414517233-A
Country	US
Kind code	B2
Filing date	Oct 17, 2014
Priority date	Oct 23, 2013
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A locking device includes an operating lever, a base and a repulsion generating member, wherein the operating lever has a releasing position and a locking position relative to the base, and the repulsion generating member is arranged between the base and the operating lever and generates a repulsion force for application to the operating lever during movement from the releasing position to the locking position. When the operating lever does not completely reach the locking position due to abnormal operation, the repulsion generating member will cause the operating lever to return to the releasing position thereby provide an indication. The locking device can thus provide an indication when the locking operation does not reach the correct position, thereby avoiding user confusion and abnormal operation.

First claim

What is claimed is:

1. A mower, comprising:
a main body;
four wheels supporting the main body; and
a handle connected to the main body, the handle comprising a telescopic rod, wherein the telescopic rod comprises:
an inner tube;
an outer tube; and
a locking device, wherein the inner tube is slidably connected to the outer tube, the locking device locking the relative position between the inner tube and the outer tube, wherein the locking device comprises:
a pivoting shaft;
an operating lever;
a base; and
a repulsion generating member,
the base being sleeved on the outer tube and the pivoting shaft being arranged on the base, a first end of the operating lever being provided with a locking member for rotating around the pivoting shaft relative to the base, the repulsion generating member being arranged between the base and the operating lever and generating a repulsion force for application to the operating lever during the movement of the operating lever from the releasing position to the locking position,

wherein the inner tube has a first through hole and the outer tube has a cooperating second through hole, the operating lever further comprises a locking reinforcement member for engagement with the first through hole and the second through hole simultaneously when the first through hole and the second through hole are aligned and the locking member is moved towards the locking position, and
wherein a second end of the operating lever opposite to the first end of the locking member is provided with a friction portion, and when the operating lever is rotated to the locking position the friction portion is frictionally engaged with the outer wall of the base.

2. The mower according to claim 1 , wherein the repulsion generating member is a torsion spring with one end connected to the base and the other end connected to the operating lever, when the operating lever is in the releasing position, the torsion spring is in a natural state, and when the operating lever is in the locking position, the torsion spring is in a compressed state.

3. The mower according to claim 1 , wherein the repulsion generating member is a tower-shaped spring with one end connected to the base and the other end connected to the operating lever, wherein when the operating lever is in the releasing position, the tower-shaped spring is in a natural state, and when the operating lever is in the locking position, the tower-shaped spring is in a compressed state.

4. The mower according to claim 1 , wherein the repulsion generating member comprises two magnets arranged opposite to each other, one magnet is arranged on the base and the other magnet is arranged on the operating lever, and two ends of the two magnets opposite to each other have the same polarity.

Assignees

• Chervon Ip Ltd
• Chervon Hk Ltd

Inventors

• Nie Fangjie
• Liu Qian

Classifications

• F16B7/1418

  with a clamping collar or two split clamping rings tightened by a screw or a cammed latch member · CPC title

• Y10T403/595

  Lever · CPC title

• F16B2/185

  using levers · CPC title

• F16B7/105 Primary

  locking in discrete positions, e.g. in extreme extended position · CPC title

• A01D34/824 Primary

  Handle arrangements · CPC title