Glue gun

Patent metadata

Field	Value
Publication number	US-12280392-B2
Application number	US-202217843646-A
Country	US
Kind code	B2
Filing date	Jun 17, 2022
Priority date	Jan 4, 2019
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

A glue gun includes a first handle and a second handle which are connected via a pivot pin shaft, and one of them is arranged as a fixed handle, and the other is arranged as a movable handle. The movable handle is provided with an actuating member configured to push a push member. A spacing between the actuating member and the pivot pin shaft is adjustable, such that the pivot pin shaft or the actuating member can switch between at least two gears and the ratio of a spacing between the pivot pin shaft and a force application point on the movable handle to a spacing between the pivot pin shaft and a force bearing point on the actuating member is changed, thus enabling a change in the force applied on the push member as well as a change in the rate of movement of a push rod.

First claim

The invention claimed is:

1. A glue gun, comprising:
a first handle and a second handle, wherein the first handle is connected to the second handle via a pivot pin shaft; one of the first handle and the second handle is arranged as a fixed handle, and the other one is arranged as a movable handle rotating relative to the fixed handle;
the movable handle is provided with an actuating member, and the actuating member is configured to push a push member of the glue gun; and
at least one of the actuating member and the pivot pin shaft is arranged to be adjustable in position so as to switch between at least two gears, so that a ratio of a spacing between the pivot pin shaft and a force application point on the movable handle to a spacing between the pivot pin shaft and a force bearing point on the actuating member is changed, thus enabling a change in a force applied on the push member as well as a change in a rate of movement of a push rod.

2. The glue gun of claim 1 , wherein a spacing between an axis of the actuating member and an axis of the pivot pin shaft is sized to be adjustable, such that the pivot pin shaft or the actuating member can switch between the at least two gears.

3. The glue gun of claim 2 , wherein one of the first handle and the second handle is provided with a sliding groove, which is provided with the at least two gears; and the pivot pin shaft is arranged to be slidable in the sliding groove so as to enable switching between the gears.

4. The glue gun of claim 3 , wherein a first elastic component is further provided between the first handle and the second handle; and the first elastic component is arranged to produce a pre-tightening force on one of the first handle and the second handle which is arranged as the movable handle so as to keep the pivot pin shaft in one of the gears.

5. The glue gun of claim 3 , wherein the pivot pin shaft is a stepped pin shaft, the stepped pin shaft has a first shaft diameter portion and a second shaft diameter portion, widths of the sliding groove at the gears are greater than a width of a communication portion of the sliding groove which communicates the gears; a shaft diameter of the first shaft diameter portion is greater than the width of the communication portion, and a shaft diameter of the second shaft diameter portion is smaller than the width of the communication portion; and the stepped pin shaft is configured such that: the stepped pin shaft moves axially under an action of an external force, and when the first shaft diameter portion is in one gear of the gears, the stepped pin shaft is kept in the gear, and when the second shaft diameter portion is in the gear, the stepped pin shaft can slide along the sliding groove.

6. The glue gun of claim 5 , wherein the stepped pin shaft has a pressing end, the pressing end is sheathed with a second elastic component, and the stepped pin shaft is configured such that: under a biasing action of the second elastic component, the first shaft diameter portion is in the gear; when the pressing end is pressed, the stepped pin shaft moves axially such that the second shaft diameter portion goes into the gear; and when the pressing end is released, the stepped pin shaft moves axially in an opposite direction under the action of a restoring force of the second elastic component such that the first shaft diameter portion goes into the gear again.

7. The glue gun of claim 5 , wherein one end of the stepped pin shaft is connected to a pressing portion, the pressing portion is provided with at least one positioning pin, and an axial direction of the positioning pin is parallel to an axial direction of the stepped pin shaft; the sliding groove is provided on the first handle, the second handle is provided with at least one positioning groove, and the positioning pin passes through the positioning groove and is configured to slide in the positioning groove; the positioning pin is sheathed with a third elastic component, wherein the stepped pin shaft and the positioning pin are configured to move along with the pressing portion, and under a biasing action of the third elastic component, the first shaft diameter portion is in the gear; when the pressing portion is pressed, the stepped pin shaft and the positioning pin move axially such that the second shaft diameter portion goes into the gear; and when the pressing end is released, the positioning pin and the stepped pin shaft move axially in an opposite direction under the action of a restoring force of the third elastic component such that the first shaft diameter portion goes into the gear again.

8. The glue gun of claim 7 , wherein the glue gun further comprises a blocking piece arranged opposite the pressing portion, and other ends of the stepped pin shaft and the positioning pin are connected to the blocking piece by fasteners.

9. The glue gun of claim 7 , wherein the pressing portion is provided with a first positioning pin and a second positioning pin, and the second handle is provided with a first positioning groove corresponding to the first positioning pin and a second positioning groove corresponding to the second positioning pin.

10. The glue gun of claim 9 , wherein the first positioning pin, the second positioning pin and the stepped pin shaft are distributed in a triangle shape.

11. The glue gun of claim 10 , wherein the first positioning pin and the second positioning pin are on a same straight line.

12. The glue gun of claim 7 , wherein a boss is provided on an outer surface of the pressing portion.

13. The glue gun of claim 5 , wherein the sliding groove is an arc-shaped groove or a linear groove.

14. The glue gun of claim 1 , wherein the first handle is provided with a sliding groove, which is provided with the at least two gears; and an actuating part of the actuating member is arranged to be slidable in the sliding groove so as to enable switching between the gears.

15. The glue gun of claim 14 , wherein the actuating member further comprises a pivot, and the actuating part on the actuating member is arranged to be slidable in the sliding groove around the pivot.

16. The glue gun of claim 1 , further comprising:
a brake sheathed on a push rod of the glue gun, wherein a compression spring is provided between the brake and a main body of the glue gun, and the brake is configured to retain the push rod under a push of the compression spring, so that the push rod can only move in a direction of glue flowing out.

17. The glue gun of claim 16 , wherein the main body is provided with a limiting groove, and one end of the brake is positioned in the limiting groove; and the limiting groove has a first limiting end and a second limiting end, and the brake is configured to move between the first limiting end and the second limiting end, so that the push rod has an idle stroke, with a distance being that from the first limiting end to the second limiting end, in a pushing process.

18. The glue gun of claim 17 , wherein the idle stroke is 3-5 mm.

19. A glue gun, comprising:
a trigger device comprising a movable handle and a fixed handle which are connected via a pivot pin shaft;
a main body with one end formed as an accommodation part for accommodating glue and an other end connected to the fixed handle;
a push rod with one end provided with a push body positioned in the accommodation part and the other end sheathed with a push member, wherein the push body is arranged to reciprocate along with the push rod;
an actuating member provided on the movable handle and configured to push the push member; and

Assignees

• Hangzhou United Tools Co Ltd
• Hangzhou Great Star Ind Co Ltd

Inventors

• Li Yueming

Classifications

• B05C17/01 Primary

  with {manually} mechanically or electrically actuated piston or the like {(B05C17/00533 takes precedence)} · CPC title

• B05C17/0126 Primary

  comprising an element, e.g. an arc compensating element, articulated at one end on the lever and at the other end on the piston rod driving means, e.g. a pawl · CPC title