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Patent Information & Production OptionsWrist-Worn Flashlight with Click-Lock Angle Adjustment · Patent CN113915544B

Patent CN113915544B: 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 numberCN113915544B (application CN202111093581)
TypeChina invention patent (发明专利) - examined; protects the technical solution
Original titleWrist flashlight (手腕电筒)
Patent owner923rd Hospital of the PLA Joint Logistics Support Force
InventorsLuo Haifeng, Li Zhuangjiang, Su Lifen, Liu Jinqi, Yan Liping
Filing date2021-09-17
Grant date2025-03-14
Status (China)In force - no termination recorded; a China invention patent lasts at most 20 years from filing (to 2041-09-17)
Patent familyChinese filings only - no US, European, Japanese, PCT or other filings listed
Cited byNo later citations listed
SourceGoogle Patents (search for CN113915544B)

What the claims cover, in plain language

Claim 1 - a wrist flashlight with a hook-and-loop wrist strap, a base fixed on the strap with an axle, and a lamp that turns on the axle. A toothed disc fixed on the axle meshes with teeth in the lamp’s hole; the lamp can slide on the axle so the teeth can separate. A clip with a slider in an annular groove keeps the lamp on the base. The axle has a round part and a square part sliding in a slot in the base, and a push-push latch - a cam track with closing, pause and opening points and a spring-loaded lever - holds the teeth apart or lets the spring mesh them.

Claim 2 - the cam track is on a block on the square part, with the lever and a tension spring on either side. Claims 3-4 - a button on the end of the axle in a recess of the lamp, with a step and a spring around the axle. Claim 5 - a waterproof switch and brightness button on the base, a USB charging port and battery in the lamp. Claim 6 - a dial on the lamp and a pointer on the button.

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. It is in force in China, so making or selling this design in China would need the owner’s permission while it lasts (at most until 2041-09-17). It has no US or other foreign counterpart and does not restrict the design outside China.

Before production, keep in mind:

  • Other patents may exist. Wearable lights, wrist lights and rotating lamp heads appear in US patents. Have a freedom-to-operate (FTO) search done by a US patent attorney before volume production.
  • Production location. Because the Chinese patent is in force, plan where the product is made with your patent counsel.

Customization and manufacturing

What can be customized

AreaOptions
LightLED output, beam (spot or flood), red night mode - to be confirmed in design
BatteryCapacity and run time; USB-C charging
StrapHook-and-loop, silicone or elastic band; reflective strip
HousingColors, water resistance level, soft-touch finish
Angle lockNumber of click positions (teeth on the disc)
BrandingLogo, packaging, hospital or company programs

Things to plan for (US market)

  • Batteries and chargers - lithium cells need UN 38.3 transport testing and UL safety testing; charging circuits should be tested to UL standards.
  • FCC - LED drivers and charging electronics fall under FCC Part 15 for unintentional emissions.
  • Light output claims - follow the ANSI/PLATO FL 1 flashlight standard if lumens, run time or water resistance are stated.
  • Not a medical device - market it as a general-purpose light; a light sold for diagnosis would fall under FDA rules.
  • Materials - check the strap and coatings for California Proposition 65 substances.

How a project runs

  1. Inquiry - light output, battery, strap and quantity.
  2. Design - housing, cam latch and tooth count, water sealing, electronics.
  3. Prototype - working samples for comfort, angle lock and run-time tests.
  4. Pilot run - small batch with battery and FCC testing.
  5. Production - volume production, packaging and shipping.

Quantities & timeline

The housing, lamp and latch parts need injection molds, and the electronics need certification. Send us your light output, battery, strap, quantity and target price and we will reply with options.

Patent drawings

Wrist-Worn Flashlight with Click-Lock Angle Adjustment - Patent Fig. 1
Fig. 1 - Overall view: 1 wrist strap; 2 base; 3 lamp; 9 waterproof switch; 10 brightness button; 11 plug; 12 dial; 13 pointer.
Wrist-Worn Flashlight with Click-Lock Angle Adjustment - Patent Fig. 2
Fig. 2 - Exploded view: 4 axle; 7 button; 8 third spring; 21 clip; 22 slider; 61 lever.
Wrist-Worn Flashlight with Click-Lock Angle Adjustment - Patent Fig. 3
Fig. 3 - Section: 6 push-push latch; 61 lever; 62 first spring; 23 mounting slot.
Wrist-Worn Flashlight with Click-Lock Angle Adjustment - Patent Fig. 4
Fig. 4 - Detail A of Fig. 3: 66 second spring.
Wrist-Worn Flashlight with Click-Lock Angle Adjustment - Patent Fig. 5
Fig. 5 - Axle: 41 round part; 42 square part; 5 disc; 51 teeth; 43 cam track; 44 closing point; 45 pause point; 46 opening point; 47, 48 channels; 49 block; 52 elastic bar.
Wrist-Worn Flashlight with Click-Lock Angle Adjustment - Patent Fig. 6
Fig. 6 - Lever (61): 63 mounting shaft; 64 sliding bar; 65 roller; 67 cross bar.
Wrist-Worn Flashlight with Click-Lock Angle Adjustment - Patent Fig. 7
Fig. 7 - Connection of base and lamp: 31 rotating hole; 32 inner teeth; 33 recess; 34 step; 22 slider; 23 slot; 24 insert hole.

Drawings reproduced from the public patent document for reference.

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Bring this product to market

  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 CN113915544B, assigned to 923rd Hospital of the PLA Joint Logistics Support Force. 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.