US20170218544A1

US20170218544A1 - Sewing machine needle clamp

Info

Publication number: US20170218544A1
Application number: US15/014,979
Authority: US
Inventors: Jui-Jung Chuo
Original assignee: Shing Ray Sewing Machine Co Ltd
Current assignee: Shing Ray Sewing Machine Co Ltd
Priority date: 2016-02-03
Filing date: 2016-02-03
Publication date: 2017-08-03

Abstract

A sewing machine needle clamp includes a seat and a threading element. The seat includes an assembly rod disposed at an upper portion, and an installation groove disposed at one side away from the assembly rod. The threading element includes an assembly section adhered in the installation groove, a threading section extended from the assembly section, and a plurality of thread holes disposed at the threading section. The hardness of the threading element is greater than the hardness of the seat to prevent the threading element from wear caused by sewing operations. In the sewing machine needle clamp of the present invention, the seat and the threading element are manufactured and formed separately, so as solve the issue of crookedness of machine needle holes caused by a thermal process in a conventional needle clamp.

Description

FIELD OF THE INVENTION

The present invention relates to a sewing machine needle clamp, and particularly to a sewing machine needle clamps that solves issues of deformation and crookedness caused by inadequate structural strength, poor assembly and a thermal process performed on a plurality of machine needle holes of a conventional needle clamp.

BACKGROUND OF THE INVENTION

During an application process of a sewing machine, a plurality of sewing needles are installed in a plurality of machine needle holes formed at a needle clamp. A plurality of sewing threads are penetrated through needle holes of the sewing needles via a plurality of thread holes on the needle clamp, respectively. However, current needle clamps are generally made of one single metal material. Further, to increase the wear resistance of each of the thread holes, a thermal process needs to be performed on an initial structure of the needle clamp. In addition, the machine needle holes at the needle clamp are designed and configured to locate closely to one another to meet sewing requirements, in a way that the wall thickness between two adjacent machine needle holes is thinner than the wall thickness at other parts of the needle clamp. When a thermal process is performed on the needle clamp to increase the wear resistance of the thread holes, the high temperature produced by the thermal process may cause deformation or crookedness on the parts having a thinner wall thickness. As a result, the needle linearity of the sewing needles installed at the machine needle holes is undesirably affected such that sewing operations may not be steadily performed.
Further, when the sewing machine performs high-speed sewing operations, the sewing threads abrade against the respective thread holes at a fast speed. Under a long-term application, wear in the thread holes is caused due to the abrasion brought by the sewing threads, hence producing bristles by worn and rough surfaces of the thread holes as these sewing threads pass through the respectively thread holes, even breaking the sewing threads in more severe cases. Thus, the application and quality of finished products of the sewing operations are affected.
In view of the above, solutions for solving the issue of wear produced at thread holes have been proposed by industrialists. For example, the Taiwan Patent No. M400486 discloses a combined needle seat structure. The combined needle seat structure of the disclosure includes a needle seat and a thread guiding member. The needle seat includes a plurality of inserting holes penetrating towards a lower portion. The thread guiding member includes a plurality of thread holes. To put to application, the needle seat is assembled to a sewing machine, the inserting holes are inserted by sewing needles, respectively, the thread guiding member is assembled at the needle seat, and a plurality of sewing threads are penetrated through needle holes of the sewing needles via the thread holes, respectively. Thus, the sewing machine drives the needle seat to perform vertical back-and-forth operations to cause the sewing needles to sew the sewing threads onto a piece of fabric.
However, in the solution disclosed by the Taiwan Patent No. M400486, the needle seat and the thread guiding member are assembled through a fixing member. During the assembly process, the needle seat and the thread guiding member may fail to be securely assembled due to a tolerance issue of the components or manual assembly errors, such that the application of the sewing operation is affected. Further, in the Taiwan Patent No. M400486, although a needle clamp is divided into the needle seat and the thread guiding member, the needle clamp is overall made of a metal material. That is to say, when a thermal process is performed on the thread guiding member, an issue of crookedness of the thread holes that disfavors the sewing operation may still be incurred.

SUMMARY OF THE INVENTION

It is a primary object of the present invention to provide a sewing machine needle clamp that solves issues of deformation and crookedness caused by inadequate structural strength, poor assembly and a thermal process performed on a plurality of machine needle holes of a conventional solution.
To achieve the above object, the present invention provides a sewing machine needle clamp. The sewing machine needle clamp of the present invention includes a seat and a threading element. The seat is made of a first material, and includes an assembly rod disposed at a top portion and an installation groove disposed at one side away from the assembly rod. The threading element is made of a second material. The second material is different from the first material, and the hardness of the second material is greater than the hardness of the first material. The threading element includes an assembly section adhered in the installation groove, a threading section extended from the assembly section towards a direction away from the seat, and a plurality of thread holes disposed at the threading section.
In one embodiment, the first material is a metal material, and the second material is a ceramic material.
In one embodiment, the assembly section is adhered in the installation groove by an adhesive.
In one embodiment, the seat further includes a plurality of machine needle holes penetrating from an inner portion towards a lower portion.
In one embodiment, the installation groove is disposed at the lower portion of the seat, the installation groove is in communication with at least one of the machine needle holes, the seat further includes a guiding plane slantingly disposed from the surface towards the installation groove, and a lower edge of the guiding plane is aligned with edges of the thread holes.
In one embodiment, the threading element includes a through hole disposed at the assembly section and being in communication with at least one of the machine needle holes.
In one embodiment, the threading element includes a plurality of through holes disposed at the assembly section and being communication with the machine needle holes, respectively.
In one embodiment, the seat further includes a channel penetrating two opposite sides, and the machine needle holes penetrate from a side of the channel vertically towards the lower portion of the seat.
In one embodiment, the seat further includes a plurality of fastening holes disposed at a surface. The fastening holes are disposed along a horizontal direction to be in communication with the machine needle holes, respectively.
Through the above embodiments, the present invention provides following features compared to the prior art.
1. In the present invention, as the seat and the threading element are manufactured and formed separately, no effect is imposed on the seat when a thermal process is performed on the threading element, such that the machine needle holes can be prevented from issues of deformation or crookedness caused by the thermal process. Further, the sewing needles are allowed to be steadily disposed in the machine needle holes without producing an insufficient needle linearity, thereby solving issues of deformation or crookedness caused by a thermal process performed on a plurality of machine needle holes of a conventional needle clamp.
2. In the present invention, the hardness of the threading element is greater than the hardness the seat, and wear at the thread holes caused by abrasion of a plurality of sewing threads is effectively reduced through the threading element. Thus, smooth back-and-forth movements of these sewing threads in the thread holes are ensured without producing bristles or breaking, so as to solve issues indentation and wear likely caused by inadequate structural strength of the thread holes and abrasion of the sewing threads of a conventional solution.
3. In the present invention, the seat and the threading element are adhered to each other through adhesion in between to form the undetachable structure in a composite material. Thus, the seat and the threading element become assembled and form a fixed structure, and the assembly strength of the seat and the threading element is reinforced, so as to prevent the seat and the threading element from issues of loosening or disengagement due to poor assembly, thereby solving the issue of a possible unstable application due to a detachable assembly of a conventional needle clamp.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective schematic diagram of the present invention;

FIG. 2 is an exploded schematic diagram of the present invention;

FIG. 3 is a front sectional schematic diagram of the present invention;

FIG. 4 is a top schematic diagram of the present invention; and

FIG. 5 is a perspective schematic diagram of the present invention in an application process.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Details and technical contents of the present invention are given with the accompanying drawings below.
Referring to FIG. 1 to FIG. 4, the present invention provides a sewing machine needle clamp 1. The sewing machine needle clamp 1 includes a seat 11 and a threading element 12. The seat 11 includes an assembly rod 111 disposed at a top portion, and an installation groove 112 disposed at one side away from the assembly rod 111. The threading element 12 includes an assembly section 121, a threading section 122 extended from the assembly section 121, and a plurality of thread holes 123 disposed at the threading section 122. The seat 11 is made of a first material, and the threading element 12 is made of a second material. The first material is different from the second material, and the hardness of the second material is greater than the hardness of the first material. More specifically, the first material is formed by a metal material, and the second material is formed by a ceramic material.
Detailed structures of the seat 11 and the threading element 12 are further given below. The seat 11 further includes a plurality of machine needle holes 113 penetrating from an inner portion towards a lower portion, a channel 114 slantingly penetrating towards two opposite sides, and a plurality of fastening holes 115 disposed at a surface. The machine needle holes 113 penetrate from a side of the channel 114 vertically towards the lower portion of the seat 11 (as shown in FIG. 3). The fastening holes 115 are disposed along a horizontal direction to be in communication with the machine needle holes 113 (as shown in FIG. 2 and FIG. 3), respectively. On the other hand, the threading element 12 further includes a through hole 124 disposed at the assembly section 121.
An assembly relationship of the seat 11 and the threading element 12 are illustrated with reference to FIG. 1, FIG. 2 and FIG. 3. More specifically, when the seat 11 and the threading element 12 are to be assembled, the assembly section 121 is adhered to the installation groove 112 to form an undetachable structure, whereas the threading section 122 and the thread holes 123 are revealed at the seat 11. More specifically, after the threading element 12 is assembled to the seat 11, the through hole 124 becomes in communication with at least one of the machine needle holes 113 (as shown in FIG. 4). In one embodiment, the threading element 12 may also includes a plurality of through holes 124 disposed at the assembly section 121, and the through holes 124 are communication with the machine needle holes 113, respectively. An assembly relationship of the installation groove 112 and the assembly section 121 is further described below. The assembly section 121 is adhered to the installation groove 112 by an adhesive (not shown), such that the installation groove 112 and the assembly section 121 form an undetachable structure to cause the sewing machine needle clamp 1 to form a structure made of a composite material. In one embodiment, the assembly section 121 may also be embedded into the installation groove 112 through a tight fitting means.
After the seat 11 and the threading element 12 are assembled, an application process of the sewing machine needle clamp 1 is further described. More specifically, to assemble and apply the sewing machine needle clamp 1 of the present invention to a sewing machine 2, the assembly rod 111 is assembled to the sewing machine 2 (as shown in FIG. 5). Each of the machine needle holes 113 is installed with a sewing needle 3, and a fastening member 4 is fastened into each of the fastening holes 115, so as to fix the sewing needles 3 in the machine needle holes 113 by the fastening members 4, respectively. Further, each of a plurality of sewing threads (not shown) is penetrated through a needle hole 31 at a lower portion of one of the sewing needles 3 through one of the thread holes 123. Thus, during an application process of the sewing machine 2, the sewing machine 2 drives the sewing machine needle clamp 1 to perform vertical back-and-forth movements to cause these sewing needles 3 to sew the sewing threads onto a piece of fabric (not shown).
As described, the seat 11 and the threading element 12 are adhered to each other through adhesion in between to form the undetachable structure made of a composite material. Thus, the seat 11 and the threading element 12 become assembled and form a fixed structure, so as to prevent the seat 11 and the threading element 12 from issues of loosening or disengagement due to poor assembly. Further, as the threading element 12 is formed by the second material having the hardness greater than that of the first material, the sewing machine needle clamp 1 is capable of effectively reducing wear or indentation at the thread holes 123 caused by abrasion of the sewing threads at a fast speed, hence ensuring smooth back-and-forth movements of these sewing threads in the thread holes 123 without producing bristles or breaking. Further, because the seat 11 and the threading element 12 are manufactured and formed separately, no effect is imposed on the seat 11 when a thermal process is performed on the threading element 12, such that machine needle holes 113 can be prevented from issues of deformation or crookedness caused by the thermal process. Further, the sewing needles 3 are allowed to be steadily disposed in the machine needle holes 113 without incurring an insufficient needle linearity. Therefore, the present invention is capable of solving issues of deformation or crookedness caused by a thermal process performed on a plurality of machine needle holes 113 of a conventional needle clamp.
Again referring to FIG. 1 and FIG. 2, it is clearly known from the above description that, when the sewing machine needle clamp 1 is applied with the sewing machine 2, the sewing threads are penetrated from the thread holes 123, and may possibly cause wear on the surface of the seat 11. To alleviate the wear that the sewing threads cause on the surface of the seat 11, in one embodiment, the installation groove 112 is disposed at a lower portion of the seat 11, and is in communication with at least one of the machine needle holes 113. Further, the seat 11 includes a guiding plane 116 disposed slantingly from the surface towards the installation groove 112, and a lower edge of the guiding plane 116 is aligned with edges of the thread holes 123. In an application process of this embodiment, the sewing machine needle clamp 1 may smoothly guide the sewing threads in the thread holes 123, so as to alleviate the wear on the surface of the seat 11 caused by the sewing threads when the sewing machine needle clamp 1 performs vertical back-and-forth movements.

Claims

What is claimed is:

1. A sewing machine needle clamp, comprising:

a seat, made of a first material, comprising an assembly rod disposed at an upper portion, and an installation groove disposed at one side away from the assembly rod; and

a threading element, made of a second material, the second material being different from the first material, the hardness of the second material being greater than the hardness of the first material, the threading element comprising an assembly section adhered in the installation groove, a threading section extended from the assembly section towards a direction away from the seat, and a plurality of thread holes disposed at the threading section.

2. The sewing machine needle clamp of claim 1, wherein the first material is a metal material, and the second material is a ceramic material.

3. The sewing machine needle clamp of claim 2, wherein the assembly section is adhered in the installation groove by an adhesive.

4. The sewing machine needle clamp of claim 2, wherein the seat further comprises a plurality of machine needle holes penetrating from an inner portion towards a lower portion.

5. The sewing machine needle clamp of claim 4, wherein the installation groove is disposed at the lower portion of the seat, the installation groove is in communication with at least one of the machine needle holes, the seat further comprises a guiding plane slantingly disposed from a surface towards the installation groove, and the lower edge of the guiding plane is aligned with edges of the thread holes.

6. The sewing machine needle clamp of claim 5, wherein the threading element further comprises a through hole disposed at the assembly section and being in communication with at least one of the machine needle holes.

7. The sewing machine needle clamp of claim 5, wherein the threading element further comprises a plurality of through holes disposed at the assembly section and being in communication with the machine needle holes, respectively.

8. The sewing machine needle clamp of claim 2, wherein the seat comprises a channel slantingly penetrating towards two opposite sides, and the machine needle holes penetrate from a side of the channel vertically towards a lower portion of the seat.

9. The sewing machine needle clamp of claim 2, wherein the seat further comprises a plurality of fastening holes disposed at a surface, and the fastening holes are arranged along a horizontal direction to be in communication with the machine needle holes, respectively.