How to change the size of object storage chunk?

Hello.
I want to change the size of chunk which is stored in object storage.
For example, there are 6 chunks for every minute in object storage, and I want to store one chunk for each minute. just as shown below:

I have modified the configuration as follow:
ingester:
wal:
enabled: true
dir: /tmp/wal
lifecycler:
ring:
replication_factor: 1
kvstore:
consul:
consistent_reads: false
host: consul:8500
http_client_timeout: 20s
watch_burst_size: 1
watch_rate_limit: 1
store: consul
final_sleep: 0s
chunk_idle_period: 12h
max_chunk_age: 12h
chunk_retain_period: 1m
max_transfer_retries: 0
chunk_target_size: 1572864

However, it does not work at all.
Can anyone be kind to tell me how to solve this problem?
Thanks very much.