JP3315364B2 - Needle threader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle threader which can easily pass a thread through a needle hole of a needle.

[0002]

2. Description of the Related Art Among conventional needle threaders, those capable of passing a thread through different kinds of needles, for example, a silk needle and a cotton needle, have two needle insertion tubes in the main body. Each needle insertion tube is provided with a bottomed needle insertion hole having a different diameter, and a threading hole intersecting the needle insertion hole. Two thin plate-shaped thread locking pieces are provided, and a pressing member that allows both thread locking pieces to be inserted into and pulled out of the threading hole is provided by protruding the operation unit from the main body.

In the needle threader disclosed in Japanese Utility Model Laid-Open Publication No. Sho 61-39091, a rack and a pinion are interposed between a pressing member and a thread locking piece, so that the pressing member and the thread locking A structure that links the pieces is adopted. Another type of needle threader employs a structure in which a slide member is slid left and right along a main body to move a thread locking piece left and right.

[0004]

However, the structure using the rack and the pinion has a problem that the number of parts is increased and the cost is increased. In the structure in which the slide member is moved to the left and right with respect to the main body, when the slide member is moved in the horizontal direction, the main body is moved to the side and the usability is extremely poor. Further, in the entire needle threader having the above-described shape, as shown in FIG. 10, the thread placement portion 80 is flat, so that the thread B is bent on the thread placement portion 80, and The thread B is not set at the passing position, and the thread B
In some cases, only the tip of the thread locking piece was inserted into the needle hole without being hooked on the tip of the thread locking piece, and the thread B was not inserted into the needle hole in some cases, and the operability as a threader was extremely poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to be easy to use, to allow a thread to pass through a needle hole reliably, to have a simple structure, and to be durable. The object of the present invention is to provide a needle threader having:

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a needle insertion cylinder having a bottomed needle insertion hole is erected in a main body having a pedestal surface. A threading hole communicating with the needle hole of the inserted needle is formed in the lower part of the cylinder in a direction intersecting with the needle insertion hole, and a thread placement portion is provided near the entrance of the threading hole and provided in the main body. A thread engaging piece provided on the operating member through an operating member provided in the main body by a pressing force of the pressing member, the needle threading device being removably provided in the threading hole. A slit is formed from the upper end of the needle insertion hole to the entrance of the threading hole along the longitudinal direction of the mounting portion, and the needle insertion hole has a circular cross section.
The bottom of the needle insertion hole is the threading hole
Is a flat needle insertion hole facing the crossing direction.
The flat part and the circular connection part are tapered.
It is the structure connected by .

[0007]

[0008]

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the needle threader of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a disassembled state of the main body of the needle threader of the present invention, and 1 shown in these figures is one of a pair of divided housings constituting the main body. .

The main body (divided housings 1, 2) is formed of a synthetic resin, for example, a thermoplastic resin such as polyacetal, and has an outer shape formed in a substantially inverted T-shaped cross section, and a substantially square base surface 1a at the bottom. , 2a so as to be stable when placed on a mounting surface such as a work desk.

A cylindrical needle insertion tube 3 for setting the needle A is provided on both sides in the vertical direction. These needle insertion tubes 3 have bottomed needle insertion holes 4 and 5 having different diameters.
For example, a needle insertion hole 4 with a small diameter for a silk needle and a needle insertion hole 5 with a large diameter for a cotton needle are provided with the openings 4a and 5a facing upward, respectively. A threading hole 6 intersects the needle insertion holes 4 and 5 at a position near the bottom of the needle insertion holes 4 and 5 so as to communicate with the needle hole of A, and is the same as the arc-shaped thin plate threading portion 14 described later. It is perforated in a gentle arc.

The needle insertion holes 4 and 5 have openings 4a and 5a formed in a tapered shape so that the needle can be easily inserted.
The bottom portions 5b and 4b are flattened through the tapered portions 5c and 4c so that the needle holes of the inserted needle A communicate with the threading holes 6 by utilizing the fact that the needle hole portion of the needle A is formed flat. (See FIGS. 5 and 6).

The threading hole 6 is provided for the thread B according to the thickness of the thread B.
The exit from which the tip of the threading portion 14 that has passed through the needle hole protrudes is formed smaller than the entrance into which the threading portion 14 enters so that the thread B can easily enter and the entered thread B does not easily come off. Further, a slit 7 communicating with the needle insertion holes 4 and 5 is provided on the inner side surface of the both needle insertion cylinders 3 from the opening of the needle insertion holes 4 and 5 to the threading hole 6 near the bottom along the division surface. (See FIG. 7).

Further, on both sides of the main body, near the entrance of the threading hole 6 of the needle insertion tube 3, a thread mounting portion 8 having a vertical cross section is provided on a locus on which a threading portion 14 described later moves. (See FIG. 9). The thread placement portion 8 is provided between the surface of the main body and the outer peripheral surface of the needle insertion tube 3 and is formed so as to cut out between the two in a substantially V shape.

FIG. 1 shows an inner surface of the split housing 1.
As shown by the dotted line in FIG.
A pair of guide pieces 1b that guides the pressing member 10a are provided so as to be able to slide the pressing member 10 in a direction perpendicular to the pedestal surface 1a. Further, a pair of abutting pieces 2b are provided on the inner surface of the other split housing 2 at appropriate intervals (see FIG. 8). These contact pieces 2b have the same protruding length, and the pressing member 1b and the guide piece 1b described above.
0, and has a function of sliding the pressing member 10 in parallel with the divided surface of the main body, that is, perpendicularly to the mounting surfaces (the pedestal surfaces 1a and 2a).

Further, a substantially elliptical operating member 11 made of synthetic resin is rotatably supported on shafts 1c projecting from both sides of the inner surface of the divided housing 1 so as to be rotatable. The end of the coil spring 12 is locked to the projection 11a provided, and both operating members 11 are elastically urged to rotate inward.

On the free end side of each operating member 11, a thread locking piece 13 for inserting the thread B into the needle hole is provided. The thread locking piece 13 is formed by forming a metal plate thinner than the width of the needle hole, for example, a stainless steel plate or the like in a sickle shape. The thread B is formed in a substantially arc shape in accordance with the rotation locus of the threading portion 14, and the tip surface is designed to easily lock the thread B at the tip and prevent the thread B from being damaged. 14a is cut out in an arc shape (see FIG. 5).

The pressing member 10 is formed of a synthetic resin, and has an operating portion 10b for swinging the operating member 11, and an operating portion 10b.
And a neck portion 10c integrally protruded from the upper end of the center.
At the center of the back surface of the action portion 10b, a ridge portion 10a is provided so as to project along the sliding direction (vertical direction). The neck 10c is formed in a rectangular flat plate shape, and the upper end 10d is formed thick so as to be easily pressed. Then, the arc-shaped free ends of the two operating members 13 which are elastically urged to rotate inward on the tapered surface 10t of the action portion 10b are moved in opposite directions against the elastic force of the coil spring 12. The member 13 is pushed outward to come into contact with the member, and the ridge 10a projecting from the rear surface of the action portion 10b is slidably fitted between a pair of guide pieces 1b projecting from the inner surface of the divided housing 1. And built in the body.

Further, a blade 15 is provided inside the upper right side of the main body, and a substantially L-shaped notch 16 communicating with a cutting surface of the blade 15 is formed.
The thread B can be cut by passing through.

The needle threader shown in FIGS. 3 and 4 is an embodiment in which either one of the two operating members 11 can be swung, and the pressing member of the above embodiment is divided into two symmetrically. The pressing members 21 and 22 can be individually slid. FIGS. 3 and 4 show FIGS. 1 and 2 respectively.
2 shows a state in which the main body is disassembled in the same manner as in FIG.
Reference numeral 0 denotes one of a pair of divided housings constituting the main body.

In this case, the ridges 21a and 22a are provided along the sliding direction (vertical direction) for each of the divided pressing members 21 and 22, and the ridges 21a and 22a are slidably fitted. The pair of guide pieces 23 and 24 are divided into two housings.
0 protrudes from both sides. Since the other structure is the same as that of the above-described embodiment, the reference numerals shown in FIGS. 1 and 2 are also used in FIGS. 3 and 4.

The operation of the above-described needle threader will now be described. When the needle A is inserted into the needle insertion holes 4 and 5 provided in the needle insertion tube 3 with the needle holes facing down, the needle holes communicate with the threading holes 6 as shown in FIG. At this time, as shown in FIG. 6, when the direction of the needle hole is in a direction orthogonal to the threading hole 6,
The flat needle hole of the needle A has a narrowed tapered portion 5c.
(4c) The bottom portion 5 which is rotated in contact with and formed into a flat shape
Since it enters b (4b), it is not necessary to worry about the direction of the needle hole when inserting the needle. When a needle thinner than the diameter of the needle insertion holes 4 and 5 is inserted, for example, when a silk needle is inserted into a needle insertion hole for a cotton needle, the needle hole does not contact the tapered portion, Even if the direction of the threading hole intersects with the needle insertion hole, the needle insertion hole may enter the bottom of the needle insertion hole.

When the thread B to be passed through the needle hole is set on the thread placement section 8 (see FIGS. 5 and 6), as shown in FIG. 9, the thread placement section 8 is formed into a vertical angle cross section. Therefore, the thread B surely comes into contact with the thread placement section 8 and is orthogonal to the locus through which the tip of the threading section 14 passes.

As shown in FIG. 2, when the upper end 10d of the pressing member 10 protruding from the upper portion of the main body is pushed down, both operating members abutting on the tapered surface 10t slide along the tapered surface 10t, and the coil spring 12, the threading portion 14 of the thread locking piece 13 provided at the free end of the operating member first protrudes from the main body as shown in FIG. The thread B set on the thread 8 is drawn into the threading hole 6 by the tip end surface 14a of the threading portion 14, passes the thread B through the needle hole, and the tip of the threading portion 14 passing through the needle hole and the thread are threaded. The pressing member 10 protrudes from the outlet of the through hole 6 and moves down to the lowermost position, and the operating member 11 stops swinging.

Next, when the finger is released from the pressed member 10, the operating member 11 resiliently urged by the coil spring 12 swings inward and returns, pushing the member 10 upward, as shown in FIG. Return to the state shown. However, at this time,
Since the thread projecting from the exit of the threading hole 6 is pinched by the exit, the thread remains at the spot, and only the threading portion 14 comes out of the threading hole 6 and returns to the main body.

When the needle is pulled out of the needle insertion holes 4 and 5, the thread that has passed through the needle hole is pinched at the exit of the threading hole 6, so that the thread that has not passed through the needle hole is moved with the rise of the needle. Since the needle moves upward along the slit 7 of the needle insertion tube 3 while being drawn into the needle hole, the length of the thread passing through the needle hole becomes longer as the needle is lifted, and the needle is moved from the needle insertion holes 4 and 5. The thread that has passed through the needle hole before being extracted does not fall out of the needle hole.

During the time when the thread is pinched at the exit of the threading hole 6, while the needle is being pulled out from the needle insertion holes 4 and 5, the thread is taken into a certain length so that the thread does not fall out of the needle hole. The thread only needs to be able to pass through the hole, and the thread need not be pinched until the needle is pulled out.

In the above-mentioned needle threader, when the pressing member 10 is pressed down, both the operating members 11 swing, so that by inserting a predetermined needle into each of the needle insertion holes 4 and 5, two different kinds of needles can be inserted. Different kinds of yarns can be simultaneously passed through the needle holes.

It should be noted that the above-described needle threader is a needle insertion tube 3
Although the diameters of the needle insertion holes 4 and 5 formed in the above are made different, they may be the same. In this case, the thread can be simultaneously passed through the needle holes of two needles of the same type.

As shown in FIGS. 3 and 4, when the pressing member is divided into two parts, if the two divided pressing members 21 and 22 are pushed down together, the two-part pressing member 21 and 22 are pressed together as in the needle threader described above. The thread can be passed through the needle hole of the needle at the same time. When the thread is to be passed through the needle hole of one needle, the thread can be passed by pushing down only the split pressing member 21 or 22 on the side where the needle is inserted.
The moving members 11 and 11 and the pressing member 2 need not be moved.
Wear of sliding portions such as 1 and 22 can be reduced, and the life of the coil spring 12 can be extended.

In this case, the needle threader also has different diameters of the needle insertion holes 4 and 5 formed in the needle insertion tube 3 but may have the same diameter. In this case, even if a problem occurs on one side, a predetermined thread can be passed through a needle hole of a predetermined needle using the other side.

As is clear from the above, claim 1
According to the invention according to the first aspect, it is possible to stably place the device on a mounting surface such as a desk, and it is excellent in stability when a pressing member is pressed against the mounting surface . In addition, the needle hole is
Insert the needle with the passed thread in the threading hole
When the thread is pulled out from the upper end of the hole, the thread
From the entrance of the piercing hole to the upper end of the opening of the needle insertion hole through the slit.
With the thread inserted through the needle hole.
The needle can be pulled out from the upper end opening of the needle insertion tube
Therefore, unlike conventional products, the needle hole generated when the needle is pulled out
The thread does not fall out of the machine.

When the needle is inserted into the needle insertion hole, the flat needle hole portion of the needle falls through the needle insertion hole having a circular cross section.
Contact guide to narrow taper part located in the middle
As it rotates while entering, it enters the flat bottom part, so there is no need to worry about the direction of the needle hole when inserting the needle,
Always set the needle hole and the threading hole smoothly
As a result , the thread can be reliably passed through the needle hole, and the trouble that has occurred in the conventional product can be eliminated at once.
Furthermore, since the thread is naturally set at the correct position only by placing the thread on the thread placement section, the thread is not caught on the thread locking piece, that is, in the state of idle swing, only the thread locking piece has a needle hole. The thread does not pass, and the thread can be reliably passed through the needle hole. Further, since the number of parts is small, products can be provided at low cost.

[0034]

[Brief description of the drawings]

FIG. 1 is an exploded front view showing an internal state of an embodiment of a needle threader of the present invention.

FIG. 2 is an exploded front view showing an internal state when the needle threader shown in FIG. 1 is operated.

FIG. 3 is an exploded front view showing an internal state of one embodiment of the needle threader of the present invention.

FIG. 4 is an exploded front view showing an internal state when the needle threader shown in FIG. 3 is operated.

FIG. 5 is a partially enlarged exploded front view showing a use state of the needle threader.

FIG. 6 is a partially enlarged exploded front view showing a use state of the needle threader.

FIG. 7 is a sectional view of a needle insertion tube of the needle threader.

FIG. 8 is a front vertical cross-sectional view of the needle threader at the front center.

FIG. 9 is an end view of a thread placement section of the needle threader.

FIG. 10 is an end view of a thread placement unit of a conventional needle threader.

[Explanation of symbols]

 1, 2, 20 Split housing (main body) 3 Needle insertion tube 4, 5 Needle insertion hole 6 Threading hole 8 Thread placement portion 10, 21, 22 Pressing member 11 Operating member 12 Coil spring 13 Thread locking piece

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) D05B 87/00-87/04

Claims (1)

(57) [Claims] 1. A needle insertion tube having a bottomed needle insertion hole is erected on a main body having a pedestal surface, and a threading hole for communicating a needle hole of an inserted needle is formed below the needle insertion tube. It is formed in a direction intersecting with the needle insertion hole, and a thread placement portion is provided near the entrance of the threading hole, and the operating member is provided through the operating member provided in the main body by the pressing force of the pressing member provided in the main body. In the needle threader in which the provided thread engaging piece is provided so as to be freely inserted into and removed from the threading hole, the threading is performed from the upper end of the opening of the needle insertion hole along the lengthwise direction of the thread insertion portion side of the needle insertion tube. Forming a slit that opens to the entrance of the hole, and forming the needle insertion hole into a circular cross section
The bottom of the needle insertion hole crosses the threading hole
The needle insertion hole has a flat shape oriented in the direction
A needle threader characterized in that a portion and a connecting portion having a circular cross section are connected by a tapered portion .