US20120110766A1

US20120110766A1 - Assembly joint structure of a long handle and a scraper top for a scraping tool

Info

Publication number: US20120110766A1
Application number: US12/939,511
Authority: US
Inventors: Wen-Chen Lin
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-04
Filing date: 2010-11-04
Publication date: 2012-05-10

Abstract

The invention is related to an assembly joint structure of a long handle and a scraper top for a scraping tool. In general, it contains a long handle for hand grip and a scraper top in the front. In the invention, the rear central section of the scraper top has a connecting column of suitable length. On the connecting column, there are two through holes. In the front of the long handle, there is a connecting hole that has the same inner diameter as the outer diameter of the connecting column. On the wall of the connecting hole there are corresponding through holes. When the scraper top inserts the connecting column into the connecting hole of the long handle, rivets can be put in the through holes to constitute an assembly joint structure between the long handle and the scraper top.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention is related to a scraping tool that is used to remove residual materials on wall or ground. Especially, it refers to an assembly joint structure of a long handle and a scraper top for a scraping tool.
2. Description of the Prior Art
For interior remodeling work like replacing carpet or wallpaper, it requires to thoroughly remove residual materials or adhesives on wall surface or ground surface to assure firmness and flatness. FIGS. 1 and 2 show the structural disassembly diagram and assembly joint diagram for a known scraping tool. The scraping tool generally consists of a long handle 10 for hand grip and a flat and wide scraper top 20 in the front. The scraper top 20 forms a clip base 21 in its inner front. The clip base 21 is equipped with a clip jaw 22 that is tightened with three screws 23 and secures a blade 24 inside the clip base 21. Thus, the blade 24 is allowed to stick out in the front of the clip base 21. The rear of the scraper top 20 forms a threaded connecting column 26 with screw thread 25. When the front hollow section of the long handle 10 has a threaded hole 11, the scraper top 20 can use the threaded connecting column 26 with screw thread 25 to enter the threaded hole 11 in the front of the long handle 10 and get assembled and joined. This allows a user to grasp the front or rear section of the long handle 10 and exert force to facilitate removal of residual materials or adhesives on wall surface or ground surface by the blade 24. Further understanding of the assembly and joint structure for the common scraping tool reveals the following drawbacks during use:
First, the scraper top 10 and the blade 24 are flat and wide and of a certain width. The joint section of the long handle 10 and the scraper top 20 is located in the rear center of the scraper top 20. That means the force exerted on the long handle 10 is longitudinal and in the back of the scraper top 20. However, the scraping side of the blade 24 is under lateral force. When the blade 24 is under lateral force, it is possible to have unbalanced forces on either the left or the right side. The unbalanced force can affect the user in operating the long handle 10 and exerting longitudinal force to cause rotation of the long handle 10 and eventually unexpected loosening of the long handle 10 in the process of exerting force. As a consequence, there is a concern of separating the long handle 10 and the scraper top 20.
Second, the force exerted onto the long handle 10 is transmitted through the assembly joint section to the scraper top 20. If there is a potential for the joint section to be rotated and loosened due to unbalanced force, there will be a danger of instant separation during the scraping action.
The invention aims to eliminate the drawbacks in the assembly joint structure between a long handle and a scraper top of a commonly known scraping tool. This is also the motivation of the invention.

SUMMARY OF THE INVENTION

The objective for the invention is to provide an assembly and joint structure of a long handle and a scraper top for a scraping tool that the scraper top inserts a connecting column in the rear section into a connecting hole in the front of the long handle to prevent rotation of the assembly joint section.
To achieve the above objective, the invention contains a connecting column of suitable length formed in the rear central section of the flat and wide scraper top. The connecting column has through holes, while the front section of the long handle has a connecting hole of the same diameter as the outer diameter of the connecting column. On the tubular wall of the connecting hole there are corresponding through holes. When the scraper top inserts the connecting column into the connecting hole in the front of the long handle and results in a firm joint, rivets can be put in the through holes to further enhance the assembly joint structure to prevent rotation between the long handle and the scraper top.

DETAILED DESCRIPTION OF THE INVENTION

The following figure for a preferred embodiment will describe the characteristics and functions for the invention:
FIGS. 3 and 4 show the structural disassembly diagram and assembly joint cross-sectional diagram for the scraping tool in the invention. In general, the scraping tool in the invention consists of a long handle 10 and a wide and flat scraper top 20 in the front, as seen in a traditional scraping tool. The front of the scraper top 20 forms a clip base 21. The clip base 21 along with a clip jaw 22 uses three screws 23 to secure a blade 24 inside. The blade 24 is allowed to stick out in the front of the clip base 21. The characteristics of the invention are described as follows. The rear central section of the scraper top 20 forms a connecting column 27 of suitable length with two through holes 28. The front of the long handle 10 has a connecting hole 12 of the same diameter as the outer diameter of the connecting column 27. The wall of the connecting hole 12 has corresponding through holes 13. When the scraper top 20 inserts the connecting column 27 into the connecting hole 12 in the front of the long handle 10 and results in a firm joint, rivets 14 can be put in the through holes 13 on the long handle 10 and pass through the through holes 28 on the connecting column 27 to further enhance the assembly joint structure to prevent rotation and separation between the long handle 10 and the scraper top 20. The firmness of the assembly joint structure allows the user to firmly and safely grasp the long handle 10 and exert force to the blade 24 in removing residuals on wall surface or ground surface.
The above disclosed figure and description is only for a preferred embodiment. Any modifications or equivalent applications by those who are familiar with the technology shall be included in the patent application scope.

Specific Drawing:

(1) The designated diagram for the present invention is FIG. 3.
(2) The legends for the components


10	long handle	12	connecting hole	13	through hole
14	rivet	20	scraper top	21	clip base
22	clip jaw	23	screw	24	blade
27	connecting column	28	through hole

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the structural disassembly diagram for a commonly known scraping tool.
FIG. 2 is the assembly joint diagram for a long handle and a scraper top on a commonly known scraping tool.
FIG. 3 is the structural disassembly diagram for the scraping tool in the invention.
FIG. 4 is the assembly joint cross-sectional diagram for a long handle and a scraper top of the scraping tool in the invention.

Claims

1. An assembly joint structure for a long handle and a scraper top of a scraping tool contains a long handle and a scraper top in the front with characteristics described as follows:

the rear central section of the scraper top forms a connecting column of suitable length and on the connecting column there are two through holes;

in the front of the long handle, there is a connecting hole of the same diameter as the outer diameter of the connecting column and on the wall of the connecting hole there are corresponding through holes;

the scraper top inserts the rear connecting column into the connecting hole in the front of the long handle and rivets are put in the through holes to constitute an assembly joint structure for a long handle and a scraper top.

2. As described in claim 1 for an assembly joint structure for a long handle and a scraper top of a scraping tool, the rivet can be any type of fixture.

3. As described in claim 1 for an assembly joint structure for a long handle and a scraper top of a scraping tool, the outer diameter of the connecting column in the rear of the scraper top is equal to the inner diameter of the connecting hole in the front of the long handle.