# US 10,478,741 B2 · Chain block toy facilitating connection and preventing abrasion by being elastically operated via left and right rolling

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- Number: US 10,478,741 B2
- Document ID: US10478741B2
- Status: Granted
- Kind: B2
- Application number: 15/913,158
- Filed: 2018-03-06
- Published: 2018-07-12
- Granted: 2019-11-19
- Earliest claimed: 2016-05-16
- Assignees: Iringo Co., Ltd
- Applicants: Iringo Co., Ltd
- Inventors: In-Deok Heo
- Web page: https://patentgrep.com/patent/US10478741B2

## CPC

- A63H 33/08: provided with complementary holes, grooves, or protuberances, e.g. dovetails
- A63H 33/062: {with clip or snap mechanisms}
- A63H: TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS

## Abstract

The present disclosure relates to a chain block toy assembled by interconnecting multiple assembly blocks in a fitting manner by using a female coupling part and a male coupling part. In particular, in each of the assembly blocks provided with a plurality of female coupling parts defined by a partition, an open groove is formed in the partition for forming the plurality of female coupling parts such that, when coupling or decoupling a male coupling part or rotating same in a coupled state, vertical supports of the female coupling parts are rolled to the left and right sides, thereby facilitating the coupling and decoupling, while preventing abrasion by minimizing friction.

## Claims

### Claim 1

A chain block toy for facilitating connection and preventing abrasion by being elastically operated via left and right rolling, the chain block toy comprising a plurality of assembly blocks that are interconnectable, each of the plurality of blocks comprising:
a male coupling part; and
a female coupling part including:
a pair of vertical supports that are arranged vertically,
a partition formed between the vertical supports, the partition including:
first and second ends,
a first open groove formed at the first end of the partition and extending toward the second end of the partition,
a second open groove formed at the second end of the partition and extending toward the first end of the partition, and
a plurality of coupling spaces defined by the partition and the vertical supports,
wherein, when the male coupling part is coupled to or decoupled from a female coupling part of another assembly block, or when the male coupling part is rotated in a coupled state, the partition is rolled left and right such that,
the first open groove is widened at the first end and the second open groove is narrowed at the second end, which facilitates the coupling or decoupling of the male coupling part from the female coupling part of the other assembly block, and
the female coupling part prevents the male coupling part from being abraded by reducing friction when the male coupling part is rotated.

### Claim 2 (depends on 1)

The chain block toy of claim 1,
wherein the partition is disposed at a center between the vertical supports that are symmetrically arranged in a vertical direction, such that the vertical supports are supported by the partition, and
wherein the left and right rolling is identically generated.

### Claim 3 (depends on 1)

The chain block toy of claim 1, further comprising:
a reinforcing hole including at least one of a circular shape or a square shape, which is slightly larger than an incision width of the open groove,
wherein the reinforcing hole is formed inward of the open groove formed in the partition, such that an elastic resistance is generated by the left and right rolling to improve an elastic operation.

### Claim 4 (depends on 1)

The chain block toy of claim 1, wherein the open groove formed in the partition is vertically arranged in multi-stages.

### Claim 5 (depends on 1)

The chain block toy of claim 1, wherein the open groove is inclined toward an inner center from both outer ends of the partition.