Door opening assisting device

A door-opening assisting device comprising:

• a passive member that is connected to a door closer that urges the door to move in the door-closing direction, and that rotates forward and backwards in response to the opening and closing, respectively, of the door;
• a transmission member that moves forward and backwards in the direction indicated by the opening and closing, respectively, of the door when the transmission member is connected with the passive member,
• an opening spring that urges said transmission member to move the same in the door-opening direction when the door opens, and that accumulates and then stores door-opening release pressure as a result of the movement of the transmission member,
• a lock mechanism that locks the opening spring in the release-pressure-storing state in response to the opening of the door, and
• an unlocking member that unlocks the lock mechanism in response to the closing of the door, and wherein:
• the passive member has a connecting portion on a part of the passive member's outer surface, and
• the connecting portion connects with the transmission member in such a way that the opening spring is caused to apply release pressure due to the rotation of the passive member within the predetermined angle region when the door is beginning to open, to continuously accumulate and store release pressure, and to be locked in the release-pressure-storing state.

A door-opening assisting device comprising:

• a passive member that is connected to a door closer that urges the door to move in the door-closing direction, and that rotates forward and backwards in response to the opening and closing, respectively, of the door,
• a transmission member that, when connected with the passive member, moves forward and backwards in the direction indicated by the opening and closing, respectively, of the door,
• an opening spring that urges the transmission member to move the same in the door-opening direction when the door opens, and that accumulates and stores door-opening release pressure as a result of the movement of the transmission member,
• a fixing member that, in order to remain fixed at a home position, stretches in the direction indicated by the movement of the transmission member,
• a workpiece that is provided between the opening spring and the transmission member in such a way that it can receive the opening spring's force and to move along the fixing member, applying force from the transmission member,
• a lock mechanism that is supported by the fixing member and that has lock balls that, as a result of the opening of the door, lock the movement of the workpiece and thus locks the opening spring in the release-pressure-storing state, and
• an unlocking member that, as a result of the closing of the door, unlocks the workpiece, and wherein:
• the passive member has a connecting portion on its outer surface, and
• the connecting portion of the passive member connects with the transmission member in such a way that the opening spring is caused to apply release pressure as a result of the rotation of the passive member within the predetermined angle region when the door is beginning to open, to continuously accumulate and store release pressure, and to be locked in the release-pressure-storing state.

A door-opening assisting device, comprising:

• a passive member that is connected to a door closer that urges the door to move in the door-closing direction, and that rotates forward and backwards in response to the opening and closing, respectively, of the door,
• a transmission member contactable with the passive member and that moves forward and backwards in the door-opening direction and door-closing direction, respectively, accompanying the rotation of the passive member,
• an opening spring that urges said transmission member to move the same in the door-opening direction when the door opens, and that, as a result of the movement of the transmission member, accumulates and stores door-opening release pressure,
• a lock mechanism that, when the door opens, locks the opening spring in the release-pressure-storing state, and
• an unlocking member that, due to the closing of the door, unlocks the lock mechanism, and wherein:
• the passive member has a cam face that contacts the transmission member, and
• the cam face is formed so as to allow the opening spring to apply release pressure due to the rotation of the passive member within the area of the predetermined angle at the beginning of door opening and so as to allow the opening spring to apply release pressure, to accumulate and store release pressure, and to be locked in the release-pressure-storing state.

A door-opening assisting device comprising:

• a passive member that is connected to a door closer that urges the door to move in the door-closing direction, and that rotates forward and backwards as a result of the opening and closing, respectively, of the door,
• a transmission member that can contact the passive member and that moves forward and backwards in the door-opening direction and door-closing direction, respectively, accompanying the rotation of the passive member,
• an opening spring that urges said transmission member to move the same in the door-opening direction when the door opens, and that, as a result of that movement of the transmission member, accumulates and stores release pressure in the door-opening direction,
• a fixing member that, in order to remain fixed at a home position, stretches in the direction of movement of the transmission member,
• a workpiece that is provided between the opening spring and the transmission member in such a way that it can receive the opening spring's moving force and move along the fixing member, applying moving force from the transmission member,
• a lock mechanism that is supported by the fixing member and that has lock balls that, as a result of the opening of the door, lock the movement of the workpiece and thus lock the opening spring in the release-pressure-storing state, and
• an unlocking member that, due to the closing of the door, unlocks the workpiece, and wherein
• the passive member has a cam face that contacts the transmission member, and
• the cam face allows the opening spring to apply release pressure due to the rotation of the passive member within the predetermined angle region when the door is beginning to open, to accumulate and store release pressure, and to be locked in the release-pressure-storing state.