Oyo Sportstoys, a maker of sports mini-figures and toys, has filed for chapter 11 protection, according to court documents, the Worcester Business Journal reported yesterday. The company has between $1 million and $10 million in estimated assets, and about the same in estimated liabilities, according to a Tuesday filing signed by company President Thomas Skripps. The six-year-old company raised $14 million in its first five years, according to the Marlborough Economic Development Corp. In 2015, it received a 10-year, tax-increment-financing agreement from the city to spend $8 million improving its facility in exchange for 195 new jobs.