Ink jet recording apparatus with support for recording head carriage

• US 5,917,518 A
• Filed: 10/21/1996
• Issued: 06/29/1999
• Est. Priority Date: 06/30/1992
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ikado, Masaharu, Ohashi, Tetsuyo, Uchikata, Yoshio
• Primary Examiner(s): Yockey, David F.
• Application Number:
  US08/734,309
• Time in Patent Office: 981 Days
• Field of Search: 347/37, 347/12, 347/33, 347/87, 400/352, 400/354
• US Class Current: 347/37
• CPC Class Codes: B41J 25/304 Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
• CPC Class Codes: B41J 25/34 Bodily-changeable print heads or carriages
• CPC Class Codes: B41J 29/02 Framework

Abstract

A recording apparatus includes a carriage for carrying a recording head cartridge for effecting recording, and for conveying the recording head cartridge; and a guide for guiding the carriage within a range in which the carriage is conveyed. The carriage includes a slider slidable along the guide, and a contacting device for supporting the carriage by contact with the guide when a large force is imparted on the carriage, while remaining away from the guide during a normal conveying operation.

Claims

1. A recording apparatus having a carriage moving a recording head in a direction of movement along a sheet and carriage driving means for driving the carriage, comprising:

a guiding member extending in the direction of movement and having a sliding surface slidably supporting and guiding the carriage;

a sliding contact member provided on the carriage and being in sliding contact with said sliding surface of said guiding member to support the carriage; and

a supporting member provided on the carriage, facing and spaced from said guiding member, said supporting member abutting said guiding member to support the carriage upon receipt by the carriage of a pressing force of a level greater than a predetermined level in a direction from said supporting member toward said guiding member and toward the sheet.

2. An apparatus according to claim 1, wherein said sliding contact member sandwiches said guiding member.

3. An apparatus according to claim 1, wherein said supporting member is disposed on opposite sides of said guiding member.

4. An apparatus according to claim 1, wherein said recording head comprises ink ejection outlets for ejecting ink.

5. An apparatus according to claim 4, wherein said recording head comprises an electrothermal transducer element for generating thermal energy for ejecting the ink.

6. A recording apparatus for effecting recording on a recording material on a platen with recording head driving means for moving a recording head along the platen, comprising:

a carriage for carrying the recording head;

moving means for moving said carriage in a direction of movement along the platen, a first pressing force in a predetermined direction less than a predetermined magnitude being received by said carriage during movement of said carriage;

a first guiding member, extending in the direction of movement of said carriage, and guiding said carriage;

a second guiding member extending in the direction of movement of said carriage and having a sliding surface slidably supporting and guiding said carriage;

a first sliding contact member, provided faced to and in contact with said first guiding member, on said carriage, to support said carriage;

a second sliding contact member, provided faced to said second guiding member, on said carriage, said second sliding contact member being in sliding contact with the sliding surface of said second guiding member; and

a supporting member provided faced to said second guiding member, on said carriage and spaced from said sliding surface of said second guiding member, wherein said supporting member is spaced from said second guiding member during the movement of said carriage, and upon receipt by said carriage of a second pressing force in a direction parallel to the predetermined direction and transverse to a plane of contact between said second guiding member and said second sliding contact member, the second pressing force being larger than the first pressing force less than the predetermined magnitude received by said carriage during the movement, said supporting member contacts said second guiding member by displacement of said carriage due to the larger force received by said carriage.

7. An apparatus according to claim 6, wherein said second sliding contact member sandwiches said second guiding member.

8. An apparatus according to claim 6, wherein said supporting member is disposed on opposite sides of said second guiding member.

9. An apparatus according to claim 6, wherein said recording head comprises ink ejection outlets for ejecting ink.

10. An apparatus according to claim 9, wherein said recording head comprises an electrothermal transducer element for generating thermal energy for ejecting the ink.

11. An apparatus having a carriage for moving a head in a direction of movement along a sheet and carriage driving means for driving the carriage, comprising:

a guiding member extending in the direction of movement and having a sliding surface slidably supporting and guiding the carriage;

a sliding contact member provided on the carriage and being in sliding contact with said sliding surface of said guiding member to support the carriage; and

a supporting member provided on the carriage, facing and spaced from said guiding member, said supporting member being disposed on opposite sides of said guiding member, said supporting member abutting said guiding member to support the carriage upon receipt by the carriage of a pressing force of a level greater than a predetermined level in directions from said supporting member toward and away from said guiding member and toward and away from the sheet.

12. An apparatus according to claim 11, wherein said sliding contact member sandwiches said guiding member.

13. An apparatus according to claim 11, wherein said recording head comprises ink ejection outlets for ejecting ink.

14. An apparatus according to claim 13, wherein said recording head comprises an electrothermal transducer element for generating thermal energy for ejecting the ink.

15. An apparatus having a carriage moving a head in a direction of movement along a sheet and carriage driving means for driving the carriage, comprising:

a guiding member extending in the direction of movement and having a sliding surface slidably supporting and guiding the carriage;

a sliding contact member provided on the carriage and being in sliding contact with said sliding surface of said guiding member to support the carriage; and

a supporting member provided on the carriage, facing and spaced from said guiding member, said supporting member abutting said guiding member to support the carriage upon receipt by the carriage of a pressing force of a level greater than a predetermined level in a direction from said supporting member toward said guiding member and toward the sheet.