Constant Force Springs (Conston)

Constant Force Springs "Conston Springs" Line-up

For more detail, CAD data, customized spec requests, please contact us.

About TK Constant Force Springs "Conston Springs"

What is Constant Force Springs "Conston Springs"

Conston Spring is an constant load spring originally designed and produced in Japan. The operation force is always constant in push/pull movement and in all the various length.

C type conston C type conston consists of one drum. The spring plate is directly pulled out.

Suitable for the application with guide rail. N type conston N type conston consists of two drums.

The spring plate is indirectly pulled out by connected wire. Suitable for the application without guide rail and flexible for compact space.

Characteristics of Constant Force Springs "Conston Springs"

The output (torque) of Conston Spring is constant after reaching the maximum output. (As the drum wraps 1/2 rotation spring, the output will be constant from the beginning of the pull out. ) Generally with the wire spring, the space for the spring is required after the spring is in neutral position.

With the Conston Spring, it provides more space as the plate spring will be stored around the drum even with the long stroke item.

Relation between Output/Size/Life cycle Extend life cycle, but not changing output and width =>Diameter will get enlarged.

Increase output, but not changing diameter and size =>Life cycle will get decreased. Increase output, but not changing life cycle and width =>Diameter will get enlarged.

*For more specific information, please contact us. By increasing the spring thickness, we can make the above two conston spring; (LEFT) Wider width and smaller diameter / (RIGHT) narrower width and bigger diameter into same output and life cycle.

Usage examples for TK Constant Force Springs "Conston Springs"

Balancing weighted object

• X-rays
• Balancer
• Door open/close
• Window open/close
• Free-stop

Fixing the object in any location without using physical stopper, by setting the pull force equivalent to object weight.

Used in the train window to operate with little force. Used in the TV monitor lift up and adjustment of the angle.

• Tool balancer
• Light balancer
• Free-stop

Used in the lift up of Shinkansens (Japans Bullet Train) roll screen. Used in the balancing of the light and adjusting the brightness with easy operation.

Lifting weighted object

• Height adjuster
• Electric fan
• Hair dryer

Used in the height adjustment of the common use object which needs adjustment before the use.

Used in the TV camera to lift the heavy object by little force without any vibration during the operation.

Push/Pull with constant force

Data card extraction Staple pusher for stapler Used in the automotive cup holders push/pull function. The object can be operated with constant force.

Used in the tobacco auto-extractor in convenience store. Also used in DVDs, medicines, and all other items that need stock management.

For more details, CAD data, customized spec requests, please contact us.

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