Patent Application
20170218544
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.
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.
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.
Details and technical contents of the present invention are given with the accompanying drawings below.
Referring to
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
An assembly relationship of the seat 11 and the threading element 12 are illustrated with reference to
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
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
