Hand-held staple gun having a safety device

• US 7,464,845 B2
• Filed: 12/19/2006
• Issued: 12/16/2008
• Est. Priority Date: 12/22/2005
• Status: Expired due to Fees

• Current Assignee: Welcome Company Limited (KDDI Corporation)
• Original Assignee: Welcome Company Limited (KDDI Corporation)
• Inventors: Chou, Ammy
• Primary Examiner(s): Durand; Paul R.
• Assistant Examiner(s): CHUKWURAH, NATHANIEL C
• Application Number:
  US11/641,082
• Publication Number:
  US 20070145094A1
• Time in Patent Office: 728 Days
• Field of Search: 227/126, 227/127, 227/132
• US Class Current: 227/132
• CPC Class Codes: B25C 5/11 operated by manual or foot power

Abstract

A hand-held staple gun comprises a housing, a driver, a spring means, a handle, and a safe actuation mechanism. The safe actuation mechanism includes a swing means, a link, and an actuation control rod. The swing means is pivotally secured to the housing and the link is pivotally connected with the swing means. When the staple gun is not in use, the link cannot engage the driver even if the handle is pressed down, and when the staple gun is in use, the actuation control rod is pressed upward into the housing, so that the actuation control rod pushes the swing means, making the link engage the driver and therefore possible to drive staples out of the staple gun when pressing down of the handle.

Claims

1. A hand-held staple gun, comprising:

a housing, including a left side, a right side and a front side, and defining an internal space which includes an accommodation chamber;

a safe actuation mechanism, including a swing means, a link and an actuation control rod, wherein the swing means is pivotally secured to the housing, the link is pivotally connected with the swing means, the swing means and the link are biased by a torsion spring, and the actuation control rod has a first end stretching downward and out of the housing and has a second end pushing upward and touching the swing means such that the actuation control rod is biased by the elastic force of the torsion spring;

a driver, being movably disposed in the internal space of the housing and spaced apart from and paralleled with the actuation control rod of the safe actuation mechanism, and being driven out of the housing by an elastic force;

a spring means, being disposed on the driver so as to provide the driver the elastic force and thus fire staples; and

a handle, being pivotally secured to the housing and activating the link when pressing down of the handle;

whereby, when the staple gun is not in use, the link cannot engage the driver even if the handle is pressed down, and when the staple gun is in use, the actuation control rod is pressed upward into the housing, so that the actuation control rod pushes the swing means, making the link engage the driver, where the driver, being biased by the spring means, is moved upward when the handle is pressed down, and when the handle is pressed down continuously, the link releases abruptly from the driver, making the driver rush downward so as to drive the staples out of the staple gun, through the help of the elasticity force of the spring means.

2. The hand-held staple gun as claimed in claim 1, wherein the driver is formed with an opening and a support on which the spring means is seated.

3. The hand-held staple gun as claimed in claim 1, wherein the spring means is a compression spring.

4. The hand-held staple gun as claimed in claim 3, wherein the spring means is positioned, in a compressed state, in the accommodation chamber.

5. The hand-held staple gun as claimed in claim 1, wherein a plate, to which a buffer pad is adhered, is firmly secured to the housing in the accommodation chamber.

6. The hand-held staple gun, as claimed in claim 1, wherein the link of the safe actuation mechanism has a first end positioning besides the opening of the driver and has a second end mounted with a roller.

7. The hand-held staple gun, as claimed in claim 1, wherein the spring means is a torsion spring, having a first end pressing against the support of the driver.

8. The hand-held staple gun, as claimed in claim 7, wherein a bottom plate is secured to the housing and is provided underneath the support of the driver, where a buffer pad is interposed between the bottom plate and the support.

9. The hand-held staple gun, as claimed in claim 1, wherein the spring means is a leaf spring, having a first end affixed on the driver and a second end secured to the housing.

10. The hand-held staple gun, as claimed in claim 9, wherein a bottom plate is secured to the housing and is provided underneath the spring means, where a buffer pad is interposed between the bottom plate and the spring means.

11. A hand-held staple gun, comprising:

a housing, including a left side, a right side, a first chute having an outlet, and a second chute having an outlet;

a safe actuation mechanism, including a swing means having a first end and a second end, a hook, and an actuation control rod having a first end and a second end, wherein the swing means is pivotally secured to the housing, and the actuation control rod is movably disposed in the second chute, such that a first end stretches downward and out of the outlet of the second chute of the housing and a second end touches the first end of the swing means such that the actuation control rod is biased by the elastic force of a torsion spring coaxially fixed on the housing with the swing means;

a driver being movably received in the first chute of the housing and spaced apart and paralleled with the actuation control rod of the safe actuation mechanism and being driven out of the outlet of the first chute by an elastic force;

a spring means, having a first end fixed in the housing, and having a second end engaging the driver; and

a handle, being pivotally secured to the swing means at the second end of the swing means, and the hook being fixed to the handle, with a front end of the hook adjacent to the driver and activating the driver when pressing down of the handle, and the torsion spring with one end biasing the housing and with another end biasing the handle;

whereby, when the staple gun is not in use, the hook cannot engage the driver even if the handle is pressed down, and when the staple gun is in use, the actuation control rod is pressed upward into the second chute, so that the actuation control rod pushes the swing means, making the hook engage the driver, where the driver, being biased by the spring means, is moved upward when the handle is pressed down, and when the handle is pressed down continuously, the hook releases abruptly from the driver, making the driver rush downward so as to drive staples out of the staple gun, through the help of the elasticity force of the spring means.

12. The hand-held staple gun as claimed in claim 11, wherein the driver is formed with an opening, an engaging hole, and an impact portion at the lower part of the driver, with the second end of the spring means received in the engaging hole of the driver.

13. The hand-held staple gun as claimed in claim 11, wherein the first end of the actuation control rod is sleeved with a cap.

14. The hand-held staple gun as claimed in claim 11, wherein the spring means has its first end received and fixed in a recess of the housing.

15. A hand-held staple gun, comprising:

a housing, including a left side, a right side, a first chute having an outlet, and a second chute having an outlet;

a safe actuation mechanism, including a hook, and an actuation control rod having a vertical end movably disposed in and stretching downward out of the outlet of the second chute of the housing and a horizontal end abutting on a rear end of the hook such that the actuation control rod is biased by the elastic force of a torsion spring coaxially fixed on the housing with the handle;

a driver being movably received in the first chute of the housing and spaced apart from and paralleled with the actuation control rod of the safe actuation mechanism and being driven out of the outlet of the first chute by an elastic force;

a spring means, having a first end fixed in the housing, and having a second end engaging the driver; and

a handle, being pivotally secured to the housing, and with the hook pivotally secured to the handle, and with one end of the torsion spring pressed on the housing and another end of the torsion spring pressed on the handle;

whereby, when the staple gun is not in use, the hook cannot engage the driver even if the handle is pressed down, and when the staple gun is in use, the vertical end of the actuation control rod is pressed upward into the second chute of the housing, so that the horizontal end of the actuation control rod pushes the hook, making the hook engage the driver, where the driver, being biased by the spring means, is moved upward when the handle is pressed down, and when the handle is pressed down continuously, the hook releases abruptly from the driver, making the driver rush downward so as to drive staples out of the staple gun, through the help of the elasticity force of the spring means.

16. The hand-held staple gun as claimed in claim 15, wherein the driver is formed with an opening, an engaging hole, and an impact portion at the lower part of the driver, with the second end of the spring means received in the engaging hole of the driver.

17. The hand-held staple gun as claimed in claim 15, wherein the vertical end of the actuation control rod is sleeved with a cap.

18. The hand-held staple gun as claimed in claim 15, wherein the spring means has its first end received and fixed in a recess of the housing.