FOLDABLE SAW

• US 20200130167A1
• Filed: 07/18/2017
• Published: 04/30/2020
• Est. Priority Date: 07/18/2017
• Status: Active Grant

• Current Assignee: UM:Kogyo, Inc.
• Original Assignee: UM:Kogyo, Inc.
• Inventors: MIYAWAKI, SHOZO
• Granted Patent: US 10,875,171 B2
• Time in Patent Office: Days
• CPC Class Codes: B23D 49/10 Hand-held or hand-operated sawing devices with straight saw blades
• CPC Class Codes: B23D 51/01 characterised by the handle
• CPC Class Codes: B23D 51/03 with extensible or collapsible frames ; Frames with spare blade storage means
• CPC Class Codes: B25G 3/38 Hinged, pivoted, swivelling, or folding joints
• CPC Class Codes: B26B 1/042 by a spring biased locking lever pivoting around an axis parallel to the pivot axis of the blade
• CPC Class Codes: B26B 1/044 by a spring tongue snapping behind or into the tang of the blade from a side part of the handle
• CPC Class Codes: B27B 21/04 Cross-cut saws; Pad saws

Abstract

A foldable saw is provided in which a latch mechanism for latching and securing a freely foldable saw blade body in its use position can be produced and assembled very easily with a minimum number of components on the basis of an idea different from the conventional ideas and that exerts a favorable latching effect. The foldable saw 1 includes, on a saw handle body 20, a latch body 10 made of spring wire and including a coil section 11, a stop pin section 12, a latch section 13, and an operation section 15. The saw handle body 20 includes at least a seating recess 23, a pin hole 24, and a receiving groove 22. The latch body 10 is configured, in the state of being attached to the saw handle body 20, such that the latch section 13 located in front of the coil section 11 enters into the receiving groove 22 by spring bias, and that the latch section 13 retreats against the spring bias in response to an operation of the operation section 15 located in the rear of the coil section 11.

Claims

1. A foldable saw including at least a saw handle body, a saw blade body pivotally supported in a freely foldable and retractable manner with respect to the saw handle body and configured to be latched and locked in a use position, and a latch body attached to the saw handle body and configured to latch and lock the saw blade body, wherein the latch body is made of single spring wire and comprises at least a coil section wound into a coil form, a stop pin section configured to extend from the coil section for pinning the coil section, a latch section configured to extend frontward from the coil section so as to be positioned in front of the coil section, and an operation section configured to extend rearward from the latch section so as to be positioned in rear of the coil section, the saw blade body comprises at least a latch groove to which the latch body is to be latched, and the saw handle body comprises at least a seating recess for the coil section of the latch body to be seated therein, a pin hole for the stop pin section of the latch body to be inserted and locked therein, and a receiving groove for the latch section of the latch body and the latch groove of the saw blade body to be received therein, and wherein the latch body is configured, in the state of being attached to the saw handle body, such that the latch section is spring-biased to enter into the receiving groove of the saw handle body, and that the latch section is responsive to an operation of the operation section to retreat against the spring bias.

2. The foldable saw according to claim 1, wherein the coil section of the latch body is placed in the seating recess of the saw handle body in a state where an axial center of the coil section is orthogonal to front and back faces of the saw handle body, the stop pin section of the latch body is configured to extend from an end of the coil section, the latch section of the latch body is configured to extend frontward from another end of the coil section so as to be positioned in front of the coil section, the operation section is configured to extend continuously from the latch section rearward so as to be positioned in rear of the coil section, and the latch section and the operation section extending frontward and rearward, respectively, are configured to move up and down alternately with a branch line section as a fulcrum, the branch line section traversing on around a top of the coil section in an axial direction thereof.

3. The foldable saw according to claim 2, wherein the operation section of the latch body is arranged unattached above a top face of the saw handle body and configured, when pressed downward, to raise the latch section with the branch line section of the latch body as the fulcrum.

4. The foldable saw according to claim 1, wherein the coil section of the latch body seated in the seating recess of the saw handle body is retained in the seating recess, with a movable distance of the coil section being limited by the stop pin section locked in the pin hole of the saw handle body and the latch section spring-biased into the receiving groove of the saw handle body.

5. The foldable saw according to claim 1, wherein the pin hole of the saw handle body for locking the stop pin section of the latch body is arranged in a position lower in level than a position of a bottom of the seating recess to prevent the coil section of the latch body from coming off upward from the seating recess.

6. The foldable saw according to claim 1, wherein the latch section of the latch body spring-biased and held in the state of being received in the receiving groove of the saw handle body is configured such that, when the coil section is about to move in a direction coming off from the seating recess of the saw handle body, the latch section abuts against an inner wall of the receiving groove of the saw handle body to prevent the movement of the coil section.

7. The foldable saw according to claim 1, wherein the seating recess of the saw handle body has an open end slightly reduced in diameter.

8. The foldable saw according to claim 2, wherein the coil section of the latch body seated in the seating recess of the saw handle body is retained in the seating recess, with a movable distance of the coil section being limited by the stop pin section locked in the pin hole of the saw handle body and the latch section spring-biased into the receiving groove of the saw handle body.

9. The foldable saw according to claim 3, wherein the coil section of the latch body seated in the seating recess of the saw handle body is retained in the seating recess, with a movable distance of the coil section being limited by the stop pin section locked in the pin hole of the saw handle body and the latch section spring-biased into the receiving groove of the saw handle body.

10. The foldable saw according to claim 2, wherein the pin hole of the saw handle body for locking the stop pin section of the latch body is arranged in a position lower in level than a position of a bottom of the seating recess to prevent the coil section of the latch body from coming off upward from the seating recess.

11. The foldable saw according to claim 3, wherein the pin hole of the saw handle body for locking the stop pin section of the latch body is arranged in a position lower in level than a position of a bottom of the seating recess to prevent the coil section of the latch body from coming off upward from the seating recess.

12. The foldable saw according to claim 4, wherein the pin hole of the saw handle body for locking the stop pin section of the latch body is arranged in a position lower in level than a position of a bottom of the seating recess to prevent the coil section of the latch body from coming off upward from the seating recess.

13. The foldable saw according to claim 2, wherein the latch section of the latch body spring-biased and held in the state of being received in the receiving groove of the saw handle body is configured such that, when the coil section is about to move in a direction coming off from the seating recess of the saw handle body, the latch section abuts against an inner wall of the receiving groove of the saw handle body to prevent the movement of the coil section.

14. The foldable saw according to claim 3, wherein the latch section of the latch body spring-biased and held in the state of being received in the receiving groove of the saw handle body is configured such that, when the coil section is about to move in a direction coming off from the seating recess of the saw handle body, the latch section abuts against an inner wall of the receiving groove of the saw handle body to prevent the movement of the coil section.

15. The foldable saw according to claim 4, wherein the latch section of the latch body spring-biased and held in the state of being received in the receiving groove of the saw handle body is configured such that, when the coil section is about to move in a direction coming off from the seating recess of the saw handle body, the latch section abuts against an inner wall of the receiving groove of the saw handle body to prevent the movement of the coil section.

16. The foldable saw according to claim 5, wherein the latch section of the latch body spring-biased and held in the state of being received in the receiving groove of the saw handle body is configured such that, when the coil section is about to move in a direction coming off from the seating recess of the saw handle body, the latch section abuts against an inner wall of the receiving groove of the saw handle body to prevent the movement of the coil section.

17. The foldable saw according to claim 2, wherein the seating recess of the saw handle body has an open end slightly reduced in diameter.

18. The foldable saw according to claim 3, wherein the seating recess of the saw handle body has an open end slightly reduced in diameter.

19. The foldable saw according to claim 4, wherein the seating recess of the saw handle body has an open end slightly reduced in diameter.

20. The foldable saw according to claim 5, wherein the seating recess of the saw handle body has an open end slightly reduced in diameter.