WO2017016419A1

WO2017016419A1 - Tool handle having inner safety core and hand tool comprising same

Info

Publication number: WO2017016419A1
Application number: PCT/CN2016/090575
Authority: WO
Inventors: 王�华; 左苏兰
Original assignee: 王�华; 左苏兰
Priority date: 2015-07-24
Filing date: 2016-07-20
Publication date: 2017-02-02
Also published as: CN104959963A; CN104959963B

Abstract

Disclosed is a tool handle (20) having an inner safety core (230), comprising an outer housing and an inner cavity, wherein the inner cavity is filled with the safety core made of a lightweight and flexible material. Also disclosed is a hand tool comprising the tool handle. The tool handle in use can absorb a vibration and reduce a counterforce to alleviate fatigue of an operator. Also, the tool handle uses less material than the existing hollow tool handle, is more lightweight and high-strength, and is ensured not to be broken into halves when broken, thus being more safe and reliable.

Description

Tool handle with safety core and hand tool including the tool handle

Technical field

The present invention relates to a tool handle, and more particularly to a tool handle with a safety core and a hand tool including the tool handle.

Background technique

Existing hand tools generally include a tool head and a tool handle that is coupled to the tool head. The tool head mainly has an axe, a hammer, a hammer, and the like. Tool handles are typically made of engineering plastic, metal or wood.

Chinese Utility Model No. 201420601467.7 provides a hand tool with a hollow curved handle, comprising a tool head and a tool handle, the tool head being connected to the tool handle, the tool handle being a hollow curved handle, the tool The head and the tool shank are integrally connected by injection molding. Although the above hand tool with a hollow curved handle is light in weight, comfortable to use, and high in efficiency, its safety cannot be fully ensured, especially if the tool handle is broken due to abnormal use or other reasons, it may cause The part of the tool head and the remaining part of the tool shank are separated at the break, posing a serious safety hazard.

Providing hand tools with sufficient security has been a constant concern and problem to be solved in the field.

Summary of the invention

In one aspect, in order to address the deficiencies of the prior art, the present invention provides a tool shank with a safety core having an outer casing and an internal cavity within the internal cavity of the tool shank Filled with a safety core, which is a lightweight, flexible material.

In one embodiment, the tool shank is a straight shank. Preferably, the tool shank has a reinforcing member at an end that is coupled to the tool head. Further preferably, the tool shank is a flip tool shank, such as, but not limited to, a tapered yoke locking device as disclosed in Chinese Patent Application No. 201310380813.3, the entire disclosure of which is incorporated herein in its entirety This application is incorporated by reference.

Those skilled in the art will appreciate that a curved handle tool shank having the above described inner core is also within the scope of the present invention.

In one embodiment, the tool shank is made of engineering plastic.

In another embodiment, the tool shank is made of a metallic material.

In a preferred embodiment, the lightweight flexible material is a flexible plastic, an elastic metal material or a wood material.

In a further preferred embodiment, preferably, the density of the lightweight flexible material is determined according to the product bending standard and the fatigue test requirements, but is usually not less than 0.6 g/cm ³ .

As another aspect of the present invention, the tool shank with a safety core disclosed herein can be connected to a plurality of tool heads by a dressing or flipping method or integrated with the tool head in an integrally formed manner to form a belt with a safety inside. Hand tool for the tool handle of the core.

The term "dress" in the present application means the connection of the tool shank of the present invention with the safety core from one end through the assembly hole of the tool head and the tool head, and "flip" means the insurance of the invention. The tool shank of the inner core passes through the fitting hole of the tool head from one end in one direction, and then moves the tool shank from the opposite direction to the direction, thereby locking the tool shank to the tool head.

In another aspect, the present invention also provides a tool for manufacturing the above-mentioned insured core The method of shank includes: preparing a lightweight flexible material insurance core; placing the lightweight flexible material insurance core into a molding die, and integrally molding the tool shank.

The present invention also provides another method of manufacturing the above-described tool shank having a safety core, comprising: integrally forming a tool shank with an internal cavity; and an internal cavity to the tool shank having an internal cavity The inner core is cast with a lightweight flexible material.

The lightweight, flexible material in the method is preferably a lightweight, flexible plastic. More preferably, it is a lightweight flexible plastic having a density of not less than 0.6 g/cm ³ .

The tool shank of the present invention fills the internal cavity of the tool shank with a lightweight flexible material, absorbs vibration during use, relieves bounce, and reduces operator fatigue. In addition, the present invention has less material, lighter weight and higher strength than the prior art hollow tool shank, and ensures that the tool shank does not split into two after being broken, thereby being safer and more reliable. At the same time, the invention is applicable to hollow curved shanks, hollow straight shanks and other shaped hollow tool shanks. The hand tool made by using the tool shank of the present invention also has the above advantages, and the safety and reliability are remarkably improved.

The tool shank with the inner core of the present invention is suitable for the tool shank of an ax, hammer or other agricultural implement, garden tool.

DRAWINGS

1 is a front elevational view of a hand tool having a tool shank with a safety core, in accordance with an embodiment of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

Figure 3 is a cross-sectional view of the hand tool of Figure 1 having a tool shank with a safety core along its length;

4 is a side view of a tool shank with a safety core according to another embodiment of the present invention. a cross-sectional view of the length thereof;

Figure 5 is a cross-sectional view of the tool shank with a safety core along its length in accordance with yet another embodiment of the present invention.

detailed description

The invention will now be further described with reference to the accompanying drawings. It is to be understood that the specific embodiments of the invention described in the drawings are merely illustrative of the invention Therefore, the drawings in the present application should not be construed as limiting the invention.

It is to be understood that the subject matter shown in the drawings of the present invention is only exemplary and should not be construed as limiting.

As shown in Figures 1 through 3, a hand tool 100 having a tool shank with a safety core in the present invention includes a tool head 10, a tool shank 20, and the tool head 10 and tool shank 20 can be integrally formed using processes known in the art. Although the tool head 10 is shown as an axe, it can also be a hammer head, a farm implement, a garden tool, and the like. The tool handle 20 can be integrally formed with the tool head 10 by using an engineering plastic injection molding process, but the metal material can also be integrally formed with the tool head 10 by a die casting process.

As shown in Figures 1 and 3, the tool shank 20 can also include a tool shank attachment end 210 and a tool shank grip 220 that are coupled to the tool head. Relative to the tool shank connection end 210, the tool shank grip portion 220 has a necked configuration, and a non-slip soft material 2101 is attached to the constriction for convenient user grip.

For the purpose of suspension, a suspension hole 240 is further provided at the end of the tool grip portion 220.

As an important aspect of the present invention, the tool shank 20 is a hollow structure including an outer casing and an inner cavity, and the inner cavity is filled with a safety core 230. The inner core 230 is a lightweight, flexible material that is flexible and resistant to breakage. The lightweight flexible material is preferably It is a flexible plastic, an elastic metal material or a wood material, but is not limited thereto. The use of the above lightweight flexible material not only does not significantly increase the weight of the hand tool, but provides a significant advantage in making the hand tool of the present invention safer. When the tool shank is broken when it is used abnormally, due to the existence of the lightweight flexible material, the tool shank is not completely broken and separated into two sections at the breakage, thereby avoiding serious personal injury due to the separation of the tool head portion. Or other security incidents.

The lightweight flexible material described above is still joined together when the tool shank is broken so that the tool shank does not break apart at the break.

The fuse core 230, such as a lightweight, flexible material, does not significantly increase the weight of the hand tool tool shank 20 of the present invention.

To enhance the connection of the tool head 10 and the tool shank 20, a perforation 120 is also provided on the tool head such that molten molten plastic or metal alloy can pass through the perforations 120 when the tool head 10 and the tool shank 20 are integrally formed. Thereby the tool shank material at both ends of the perforation 120 is joined.

Further, to enhance the connection of the tool head 10 and the tool shank 20, a reinforcement block 130 that extends into the tool head 10 and the tool shank 20, respectively, is also provided at the junction of the tool head 10 and the tool shank 20.

When manufacturing the hand tool 100 having the tool holder with the safety core in the present invention, the lightweight flexible material insurance core 230 may be first prepared, and then the lightweight flexible material insurance core 230 is placed in the molding die. It is integrally formed with the tool head 10 and the tool shank 20. It is also possible to first integrally mold a hand tool with a tool shank with an internal cavity and then cast a lightweight flexible material 230 into the hollow structure of the hand tool of the tool shank with the internal cavity.

The tool shank of the present invention does not necessarily need to be integrally formed with the tool head, and it can be connected as a separate component to a plurality of tool heads in various ways. By way of example, Figure 4 illustrates a cross-sectional view of a tool shank with a safety core in its lengthwise direction in accordance with another embodiment of the present invention. As shown in Fig. 4, the tool shank 20' includes an outer casing 201', wherein one end of the outer casing 201' is a connecting end 210' to a tool head (not shown). The inner cavity surrounded by the outer casing 201' is filled with a safety core 230' such as a lightweight flexible material (e.g., flexible plastic, elastic metal material, wood material, etc.). The lightweight, flexible material is similar to the lightweight, flexible material illustrated in Figures 1, 2, and 3. Similarly, the tool shank 20' can also be provided with a tool shank grip 220' for ease of grip by the user. In order to increase the strength of the tool shank, preferably, the tool shank 20' of Fig. 4 is also provided with a reinforcing member 260' at its connecting end. It should be understood that although the reinforcing member 260' is shown in the drawings, the tool shank 20' does not necessarily need to be provided with the reinforcing member.

Figure 5 is a cross-sectional view of the tool shank with a safety core along its length in accordance with yet another embodiment of the present invention. The only difference from FIG. 4 is that the tool shank 20" shown in FIG. 5 is a flip-chip tool shank with a tapered pair of locking devices 210" at the attachment end. The conical clip locking device 210" can employ a conical clip locking device as disclosed in Chinese Patent Application No. 201310380813.3, which is not described herein.

Based on the description of the preferred embodiments of the present invention, it should be understood that the invention is not limited by the specific details Obvious changes are equally likely to achieve the objectives of the present invention.

Claims

A tool shank with a safety core, the tool shank comprising an outer casing and an inner cavity, wherein the inner cavity of the tool shank is filled with a safety inner core, and the safety inner core is lightweight Flexible material.
The tool shank with a safety core according to claim 1, wherein the tool shank is made of engineering plastic.
The tool shank with a safety core according to claim 1, wherein the tool shank is made of a metal material.
The tool shank with a safety core according to claim 1, wherein the tool shank is a straight shank.
The tool shank with a safety core according to claim 1, wherein the tool shank is a curved shank.
The tool shank with a safety core according to claim 1, wherein the tool shank has a tapered clip locking device at its connection end with the tool head.
The tool shank with a safety core according to claim 1, wherein the tool shank has a reinforcing member at its connection end with the tool head.
A tool holder with a safety core according to any one of claims 1 to 7, wherein the lightweight flexible material is a flexible plastic, an elastic metal material or a wood material.
The tool holder with a safety core according to claim 8, wherein the lightweight flexible material has a density of not less than 0.6 g/cm3.
A hand tool comprising the insured core of any of claims 1-9 Tool handle.