Attachment device-equipped electric tool

• US 8,443,914 B2
• Filed: 02/17/2011
• Issued: 05/21/2013
• Est. Priority Date: 03/16/2010
• Status: Active Grant

• Current Assignee: Makita Corporation
• Original Assignee: Makita Corporation
• Inventors: Bito, Shinya, Yoshikane, Kiyonobu, Onoda, Shinji, Machida, Yoshitaka, Iida, Hitoshi
• Primary Examiner(s): Smith, Scott A.
• Application Number:
  US13/029,524
• Publication Number:
  US 20110226502A1
• Time in Patent Office: 824 Days
• Field of Search: 173/197, 173/198, 173/217, 173/75, 173/97, 173/171, 408/58, 408/67, 175/211, 175/209
• US Class Current: 173/198
• CPC Class Codes: B23Q 11/0046 by sucking
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence
• CPC Class Codes: Y10T 408/453 and means to move gaseous fluid by application of vacuum
• CPC Class Codes: Y10T 408/50 with product handling or receiving means

Abstract

A hammer drill is provided with a connector equipped with a female terminal, movably between a connection position where the female terminal is located inside a plug-in port and a non-connection position where the female terminal is in retreat from inside the plug-in port. The hammer drill is also provided with a torsion spring that urges the connector toward the non-connection position. The connector is provided with a shutter portion that is located inside the plug-in port to close the plug-in port at the non-connection position and is in retreat from inside the plug-in port at the connection position. A dust collecting device is provided with a press rail that comes into abutment on the connector to move the connector to the connection position against the urging of the torsion spring as the dust collecting device is mounted.

Claims

1. An attachment device-equipped electric tool to which an attachment device is joined, comprising:

a male terminal protrusively provided on one of the electric tool and the attachment device;

a female terminal that is provided on the other of the electric tool and the attachment device, is located inside a plug-in port into which the male terminal can be inserted, and is electrically connected to the male terminal to allow power to be supplied from the electric tool to the attachment device as the attachment device is joined to the electric tool;

a connector that is provided on the other of the electric tool and the attachment device to support the female terminal, and is movable between a connection position where the female terminal is located inside the plug-in port and a non-connection position where the female terminal is in retreat from inside the plug-in port;

an urging unit provided on the other of the electric tool and the attachment device to urge the connector toward the non-connection position;

a shutter portion that is provided on the connector, is located inside the plug-in port at the non-connection position to close the plug-in port, and is in retreat from inside the plug-in port at the connection position; and

a press portion that is provided on the one of the electric tool and the attachment device and comes into abutment on the connector to move the connector to the connection position against urging of the urging unit as the attachment device is mounted.

2. The attachment device-equipped electric tool according to claim 1, wherein the connector is provided rotatably between the connection position and the non-connection position.

3. The attachment device-equipped electric tool according to claim 2, wherein the attachment device is slid and mounted to the electric tool,

the other of the electric tool and the attachment device on which the female terminal is provided has an outer face provided with a guide groove parallel to a direction of the sliding so that part of the connector protrudes into the guide groove, and

the press portion is a press rail that is provided on an outer face of the one of the electric tool and the attachment device on which the male terminal is provided and slides in the guide groove to come into abutment on the part of the connector as the attachment device is mounted.

4. The attachment device-equipped electric tool according to claim 2, wherein the connector is vertically rotatably supported.

5. The attachment device-equipped electric tool according to claim 4, wherein the connector is rotatably supported by fitting bosses protrusively provided on an inner face of a housing of the electric tool into circular recess portions formed in right and left outer faces of the connector respectively.

6. The attachment device-equipped electric tool according to claim 2, wherein the shutter portion is an arc-like plate body whose center is a rotational center of the connector.

7. The attachment device-equipped electric tool according to claim 1, wherein the attachment device is slid and mounted to the electric tool,

the other of the electric tool and the attachment device on which the female terminal is provided has an outer face provided with a guide groove parallel to a direction of the sliding so that part of the connector protrudes into the guide groove, and

the press portion is a press rail that is provided on an outer face of the one of the electric tool and the attachment device on which the male terminal is provided and slides in the guide groove to come into abutment on the part of the connector as the attachment device is mounted.

8. The attachment device-equipped electric tool according to claim 1, wherein the electric tool is provided with the plug-in port and the female terminal, and

the attachment device is provided with the male terminal.

9. The attachment device-equipped electric tool according to claim 1, wherein the male terminal has a protection rib provided therealong.

10. The attachment device-equipped electric tool according to claim 9, wherein the protection rib is provided parallel to the male terminal at an outer position thereof.

11. The attachment device-equipped electric tool according to claim 1, wherein at least one of the electric tool and the attachment device has an outer face provided with an elastic member that presses the other of the electric tool and the attachment device when the electric tool and the attachment device are mounted to each other, in at least one of a mounting direction of the attachment device and a direction intersecting therewith.

12. The attachment device-equipped electric tool according to claim 11, wherein the elastic member is a rubber piece.

13. The attachment device-equipped electric tool according to claim 11, wherein the elastic member is a metallic press plate formed by bending such that a central portion thereof protrudes.

14. The attachment device-equipped electric tool according to claim 1, wherein the attachment device is formed with a placement face on which a mounting portion formed on a housing of the electric tool is placed,

a pair of right and left guide rails are formed in a standing manner on the placement face and are arranged at such an interval that a lower portion of the mounting portion can be fitted therebetween,

streak-like protrusions are formed at upper ends of the guide rails, and can be fitted into a pair of right and left joint grooves formed in both lateral faces of the lower portion of the mounting portion, and

the attachment device is joined to the electric tool by sliding the mounting portion between the guide rails to fit the streak-like protrusions into the joint grooves respectively.

15. The attachment device-equipped electric tool according to claim 1, wherein the attachment device is a dust collecting device that gathers powder dust produced from a worked material through use of the electric tool.

16. The attachment device-equipped electric tool according to claim 15, wherein the dust collecting device is removably equipped with a dust box for gathering the powder dust.

17. An attachment device-equipped electric tool to which an attachment device is joined, comprising:

a male terminal protrusively provided on one of the electric tool and the attachment device;

a female terminal that is provided on the other of the electric tool and the attachment device, is located inside a plug-in port into which the male terminal can be inserted, and is electrically connected to the male terminal to allow power to be supplied from the electric tool to the attachment device as the attachment device is joined to the electric tool;

a shutter that is provided on the other of the electric tool and the attachment device and can slide between an open position and a closed position of the plug-in port;

a rotary member that is provided on the other of the electric tool and the attachment device and can rotate through engagement of one end thereof with the shutter;

an urging unit provided on the other of the electric tool and the attachment device to urge the rotary member in a rotational direction in which the shutter slides to the closed position; and

a press portion that is provided on the one of the electric tool and the attachment device and comes into abutment on the other end of the rotary member to rotate the rotary member, against urging of the urging unit, in a rotational direction in which the shutter slides to the open position as the attachment device is mounted.

18. The attachment device-equipped electric tool according to claim 17, wherein the attachment device is slid and mounted to the electric tool,

the other of the electric tool and the attachment device on which the female terminal is provided has an outer face provided with a guide groove parallel to a direction of the sliding so that the other end of the rotary member protrudes into the guide groove, and

the press portion is a press rail that is provided on an outer face of the one of the electric tool and the attachment device on which the male terminal is provided and slides in the guide groove to come into abutment on the other end of the rotary member as the attachment device is mounted.

19. The attachment device-equipped electric tool according to claim 17, wherein the electric tool is provided with the plug-in port and the female terminal, and the attachment device is provided with the male terminal.

20. The attachment device-equipped electric tool according to claim 17, wherein the male terminal has a protection rib provided therealong.

21. The attachment device-equipped electric tool according to claim 20, wherein the protection rib is provided parallel to the male terminal at an outer position thereof.

22. The attachment device-equipped electric tool according to claim 17, wherein at least one of the electric tool and the attachment device has an outer face provided with an elastic member that presses the other of the electric tool and the attachment device when the electric tool and the attachment device are mounted to each other, in at least one of a mounting direction of the attachment device and a direction intersecting therewith.

23. The attachment device-equipped electric tool according to claim 22, wherein the elastic member is a rubber piece.

24. The attachment device-equipped electric tool according to claim 22, wherein the elastic member is a metallic press plate formed by bending such that a central portion thereof protrudes.

25. The attachment device-equipped electric tool according to claim 17, wherein the attachment device is formed with a placement face on which a mounting portion formed on a housing of the electric tool is placed,

a pair of right and left guide rails are formed in a standing manner on the placement face and are arranged at such an interval that a lower portion of the mounting portion can be fitted therebetween,

streak-like protrusions are formed at upper ends of the guide rails, and can be fitted into a pair of right and left joint grooves formed in both lateral faces of the lower portion of the mounting portion, and

the attachment device is joined to the electric tool by sliding the mounting portion between the guide rails to fit the streak-like protrusions into the joint grooves respectively.

26. The attachment device-equipped electric tool according to claim 17, wherein the attachment device is a dust collecting device that gathers powder dust produced from a worked material through use of the electric tool.

27. The attachment device-equipped electric tool according to claim 26, wherein the dust collecting device is removably equipped with a dust box for gathering the powder dust.