Cutting device

Patent metadata

Field	Value
Publication number	US-9919542-B2
Application number	US-201615390787-A
Country	US
Kind code	B2
Filing date	Dec 27, 2016
Priority date	Mar 31, 2015
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

A cutting device includes a cutting blade, a receiving block, a motor, a cutting blade movement mechanism, and a receiving block movement mechanism. The cutting blade includes a blade portion. The receiving block includes a contact surface including a first contact surface and a second contact surface. The motor is configured to rotate. The cutting blade movement mechanism supports the cutting blade and is configured to move the cutting blade between a separated position and a contact position in concert with a rotation of the motor. The receiving block movement mechanism is configured to move the receiving block from a first opposed position to a second opposed position in concert with the rotation of the motor.

First claim

What is claimed is:

1. A cutting device comprising:
a cutting blade that includes a blade portion;
a receiving block that includes a contact surface contactable by the blade portion, the contact surface including a first contact surface and a second contact surface;
a motor configured to rotate;
a cutting blade movement mechanism that supports the cutting blade, the cutting blade movement mechanism being configured to move the cutting blade between a separated position and a contact position in concert with a rotation of the motor, the separated position being a position in which the blade portion is separated from the contact surface, and the contact position being a position in which the blade portion is in contact with the contact surface; and
a receiving block movement mechanism configured to move the receiving block linearly from a first opposed position to a second opposed position in concert with the rotation of the motor, the first opposed position being a position in which one of the first contact surface and the second contact surface is opposed to the blade portion, the second opposed position being a position in which the other one of the first contact surface and the second contact surface is opposed to the blade portion.

2. The cutting device according to claim 1 , wherein:
the motor is configured to rotate in a forward direction and a reverse direction,
the receiving block movement mechanism comprises:
a first gear that includes a first toothed portion, the first toothed portion being provided on a part of a circumferential surface of the first gear, the first gear being configured to rotate in a first rotation direction in concert with the rotation in the forward direction of the motor, the first gear being configured to rotate in a second rotation direction in concert with the rotation in the reverse direction of the motor, and the second rotation direction being a rotation direction opposite to the first rotation direction;
a second gear that includes a second toothed portion, the second toothed portion being provided on a circumferential surface of the second gear, the second toothed portion being configured to mesh with the first toothed portion, and the second gear being configured to be rotated by a first rotation angle by the first gear rotating in the second rotation direction; and
a cam member configured to move the receiving block linearly from the first opposed position to the second opposed position by rotating in a third rotation direction in concert with the rotation by the first rotation angle of the second gear,

a toothed portion formation angle is equal to or greater than a second rotation angle, the toothed portion formation angle being an angle from a first end portion to a second end portion in the first rotation direction, the first end portion being an end portion of the first toothed portion in the second rotation direction, the second end portion being an end portion of the first toothed portion in the first rotation direction, and the second rotation angle being a rotation angle of the first gear that causes the second gear to rotate by the first rotation angle, and
a toothed portion non-formation angle is equal to or greater than a third rotation angle, the toothed portion non-formation angle being an angle from the first end portion to the second end portion in the second rotation direction, and the third rotation direction being a rotation angle by which the first gear rotates while the cutting blade moves from the separated position to the contact position in concert with the rotation in the forward direction of the motor.

3. The cutting device according to claim 2 , wherein
the second rotation angle is smaller than the third rotation angle.

4. The cutting device according to claim 3 , wherein:
the cam member is configured to rotate around a first shaft portion, the first shaft portion extending in parallel to a movement direction of the receiving block, the cam member including a cam surface, the cam surface including a portion extending gradually to a first specified direction in a fourth rotation direction, the first specified direction being a specified direction of the movement direction, and the fourth rotation direction being a rotation direction, around the first shaft portion, opposite to the third rotation direction,
a distance from a third end portion to a fourth end portion in the first specified direction is equal to a movement distance, the third end portion being an end portion of the cam surface in an opposite direction to the first specified direction, the fourth end portion being an end portion of the cam surface in the first specified direction, and the movement distance being a distance over which the receiving block moves from the first opposed position to the second opposed position,
an angle from the third end portion to the fourth end portion in the fourth rotation direction is equal to a rotation angle of the cam member caused to rotate by the second gear rotating by the first rotation angle,
the receiving block movement mechanism is provided on the receiving block, and
the receiving block movement mechanism includes a sliding portion configured to slide with respect to the cam surface in accordance with the rotation of the cam member in the third rotation direction.

5. The cutting device according to claim 4 , wherein:
the cam surface comprises:
a first cam surface gradually extending to the first specified direction in the fourth rotation direction, a length of the first cam surface in the first specified direction being equal to the movement distance; and
a second cam surface connected to an end portion of the first cam surface in the opposite direction and extending in a separating direction and the first specified direction, the separating direction being a direction of separation from the first shaft portion,

the cam member includes a specific cam surface extending in the third rotation direction from an end portion of the second cam surface in the separating direction,
the sliding portion is configured to rotate around a second shaft portion extending in the movement direction, the sliding portion being configured to rotate between a first rotation position and a second rotation position, the first rotation position being a position in which the sliding portion slides with respect to the cam surface, and the second rotation position being a position in which the sliding portion slides with respect to the specific cam surface, and
the receiving block movement mechanism comprises:
a support member configured to move in the first specified direction, the support member including a support portion and a regulating portion, the support portion being configured to support the second shaft portion, and the regulating portion being configured to inhibit the sliding portion in the first rotation position from rotating in a direction from the second rotation position toward the first rotation position; and
an urging member configured to urge the sliding portion in the opposite direction.

6. The cutting device according to claim 5 , wherein
the cam surface includes a third cam surface, the third cam surface connecting an end portion of the first cam surface in the fourth rotation direction and an end portion of the second cam surface in the first specified direction, and the third cam surface extending in parallel to the fourth rotation direction on a side of the first specified direction with respect to the specific cam surface.

7. The cutting device according to claim 4 , wherein:
two of the cam surfaces are arranged with a gap between the two of the cam surfaces in the first specified direction, and
the sliding portion is configured to enter into the gap between the two of the c

Assignees

• Brother Ind Ltd

Inventors

• Kano Yasutoshi
• Takahashi Kohei

Classifications

• B41J11/70 Primary

  cutting perpendicular to the direction of paper feed · CPC title

• B26D5/16

  Cam means · CPC title

• B26D7/025

  acting upon planar surfaces (B26D7/04 takes precedence) · CPC title

• B26D1/065

  for thin material, e.g. for sheets, strips or the like · CPC title

• B26D2007/013

  the work being tubes, rods or logs · CPC title