diff --git a/db/sign_in_redis.py b/db/sign_in_redis.py
index f7d5b9c..3f61ced 100644
--- a/db/sign_in_redis.py
+++ b/db/sign_in_redis.py
@@ -7,15 +7,15 @@ from db.connection import DBConnectionManager
 
 class SignInRedisDB:
     """签到系统Redis相关操作"""
-    
+
     def __init__(self, db_manager: DBConnectionManager):
         self.db_manager = db_manager
         self.prefix = "group:sign_in:"
-    
+
     def get_redis_connection(self):
         """获取Redis连接"""
         return self.db_manager.get_redis_connection()
-    
+
     def load_signin_count(self) -> Dict[str, int]:
         """加载签到人数数据"""
         signin_count = {}
@@ -33,7 +33,7 @@ class SignInRedisDB:
                         count = count.decode('utf-8')
                     signin_count[group_id] = int(count)
         return signin_count
-    
+
     def save_signin_count(self, group_id: str, count: int) -> bool:
         """保存签到人数"""
         try:
@@ -42,7 +42,7 @@ class SignInRedisDB:
             return True
         except Exception:
             return False
-    
+
     def get_last_reset_date(self) -> Optional[datetime.date]:
         """获取最后重置日期"""
         with self.get_redis_connection() as redis_client:
@@ -52,7 +52,7 @@ class SignInRedisDB:
                     date_str = date_str.decode('utf-8')
                 return datetime.strptime(date_str, '%Y-%m-%d').date()
         return None
-    
+
     def save_last_reset_date(self, date: datetime.date) -> bool:
         """保存最后重置日期"""
         try:
@@ -61,7 +61,7 @@ class SignInRedisDB:
             return True
         except Exception:
             return False
-    
+
     def reset_daily_counts(self) -> bool:
         """重置每日签到计数"""
         try:
@@ -75,7 +75,7 @@ class SignInRedisDB:
             return True
         except Exception:
             return False
-    
+
     def get_user_total_sign_count_key(self, wx_id: str, group_id: str) -> str:
         """获取用户总签到次数的Redis键"""
         return f"{self.prefix}sign:total:{wx_id}:{group_id}"
@@ -83,15 +83,18 @@ class SignInRedisDB:
     def increment_user_sign_count(self, wx_id: str, group_id: str) -> int:
         """增加用户签到总次数"""
         key = self.get_user_total_sign_count_key(wx_id, group_id)
-        return self.redis.incr(key)
+        with self.get_redis_connection() as redis_client:
+            return redis_client.incr(key)
 
     def get_user_total_sign_count(self, wx_id: str, group_id: str) -> int:
         """获取用户签到总次数"""
         key = self.get_user_total_sign_count_key(wx_id, group_id)
-        count = self.redis.get(key)
-        return int(count) if count else 0
+        with self.get_redis_connection() as redis_client:
+            count = redis_client.get(key)
+            return int(count) if count else 0
 
     def set_user_total_sign_count(self, wx_id: str, group_id: str, count: int) -> bool:
         """设置用户签到总次数"""
         key = self.get_user_total_sign_count_key(wx_id, group_id)
-        return self.redis.set(key, count)
\ No newline at end of file
+        with self.get_redis_connection() as redis_client:
+            return redis_client.set(key, count)