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Patent Information & Production OptionsKeychain Box Cutter with Twist-to-Release Safety Head · Patent CN106272567B

Patent CN106272567B: bibliographic data, legal status, family, a plain-language reading of the claims, plus customization, US compliance points and how a manufacturing project runs.

At a glance

Patent numberCN106272567B (application CN201610627992)
TypeChina invention patent (发明专利) - examined; protects the technical solution
Original titlePortable parcel opening knife (便携式包裹拆刀)
Patent ownerYe Yuling (individual)
InventorYe Yuling
Filing date2016-08-02
Grant date2017-10-31
Status (China)Lapsed - terminated for non-payment of annual fees (recorded 2021-07-16)
Patent familyChinese filings only - no US, European, Japanese, PCT or other filings listed
Cited by7 later documents
SourceGoogle Patents (search for CN106272567B)

What the claims cover, in plain language

Claim 1 - a portable parcel opener with a knife tube, a removable tail cap, a removable fixed head with a central rotating cavity, a movable head rotating in the cavity with a central blade channel, a return device that turns the movable head back, a knife bar with a blade sliding in the tube, and a safety spring that limits the knife bar and returns it. Only when the movable head is turned through a preset blocking angle do the blade channel and the blade line up so the blade can come out.

Claims 2-9 - further details described in the patent: the slot and push button, the hanging hole in the tail cap, the threaded fixed head with its arc-shaped stop groove and spring, the stop pin on the movable head, the rectangular blade channel, and a version with several grooves and springs around the head.

This is a simplified reading for orientation only. The legal scope is defined by the exact claim wording in the official Chinese document.

What this means for US production

This patent was filed only in China and has lapsed, so it no longer restricts anyone in China either. It has no US or other foreign counterpart.

Before production, keep in mind:

  • Other patents may exist. Safety box cutters and keychain knives have many US patents. Have a freedom-to-operate (FTO) search done by a US patent attorney before volume production.
  • Product category. Market it as a utility cutter for packaging; keep the blade short and the look tool-like.

Customization and manufacturing

What can be customized

AreaOptions
BodyAluminum, stainless steel, titanium or reinforced plastic tube
BladeShort fixed blade or replaceable standard blade; ceramic for a safer edge
HeadTwist angle and spring force; knurled or colored grip ring
SizeLength and diameter - to be confirmed in design
BrandingAnodized colors, laser-engraved logo, gift card packaging

Things to plan for (US market)

  • State and local knife laws - short utility blades are generally allowed, but some cities and states restrict knives; describe the product as a packaging cutter and state blade length.
  • Marketplace rules - online platforms have specific listing rules for blades; keep listings tool-focused.
  • Warnings and packaging - include handling warnings, keep out of reach of children, and use blister or box packaging that protects the blade.
  • Materials - check coatings for California Proposition 65 substances.

How a project runs

  1. Inquiry - material, blade type, size and quantity.
  2. Design - head lock geometry, springs, blade holder.
  3. Prototype - samples for lock reliability and cutting tests.
  4. Pilot run - small batch to check tolerances and finish.
  5. Production - volume production, packaging and shipping.

Quantities & timeline

Turned or extruded tubes and small springs are standard; the heads need machining or molds. Send us your material, blade type, branding, quantity and target price and we will reply with options.

Patent drawings

Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 1
Fig. 1 - Overall view of the parcel opener.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 2
Fig. 2 - Overall view from another angle.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 3
Fig. 3 - Side view with section line A-A.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 4
Fig. 4 - Section A-A through the tube, blade carrier and springs.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 5
Fig. 5 - Fixed head (4) with stop groove and spring.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 6
Fig. 6 - Movable head (5) with blade channel (54) and stop pin (55).
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 7
Fig. 7 - At rest: blade (63) at the blocking angle K to the channel (54).
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 8
Fig. 8 - Head turned: channel and blade aligned; spring (45) compressed by pin (55).
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 9
Fig. 9 - Second version of the fixed head with several grooves and springs.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 10
Fig. 10 - Second version of the movable head with several stop pins.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 11
Fig. 11 - Further detail drawing from the patent.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 12
Fig. 12 - Further detail drawing from the patent.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 13
Fig. 13 - Further detail drawing from the patent.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 14
Fig. 14 - Further detail drawing from the patent.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 15
Fig. 15 - Further detail drawing from the patent.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 16
Fig. 16 - Further detail drawing from the patent.
Keychain Box Cutter with Twist-to-Release Safety Head - Patent Fig. 17
Fig. 17 - Further detail drawing from the patent.

Drawings reproduced from the public patent document for reference.

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  1. ✓ Patent vetted China-only family and legal status checked
  2. 2 Product brief · now How it works, uses and options written up
  3. 3 Prototype First samples for buyers to review
  4. 4 Pilot run Small first batch for launch customers
  5. 5 Volume production Repeat orders at scale

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This page is based on the public patent document CN106272567B, assigned to Ye Yuling (individual). IP2M is an independent manufacturing service and is not affiliated with, endorsed by or licensed by the patent owner. Images marked as concept renderings are illustrations, not photos of an existing product. Patent status information is provided for reference only and is not legal advice; confirm freedom to operate for your market before production. Full disclaimer.