Sewing machine needle

Abstract

The present invention relates to a sewing machine needle. The sewing machine needle can make it easy to visually confirm the type of the sewing machine needle. The sewing machine needle is a sewing machine needle provided with a cylindrical shank portion (11) attached to a sewing machine and a needle shaft portion (20) provided at a position on the top end side of the shank portion (11), and a groove portion (12) is formed on the peripheral surface of the shank portion (11) so as to be continuous over the entire circumference.

Description

Technical Field

[0001] This invention relates to sewing machine needles used in sewing machines. Background Technology

[0002] The sewing machine needle is inserted from below into the needle fixing part of the sewing machine and installed using screws or the like (see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-136220 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] However, such sewing machine needles are thinner and smaller, making it sometimes difficult to visually identify the type of needle.

[0008] Therefore, the objective of this invention is to make it easier to visually identify the type of sewing machine needle.

[0009] Solution for solving the problem

[0010] To solve the above problems, the present invention provides a sewing machine needle having a cylindrical handle mounted on a sewing machine and a needle bar located at a position closer to the top of the handle, wherein a groove is formed on the circumferential surface of the handle that is continuous over the entire circumference.

[0011] The effects of the invention

[0012] As described above, the present invention has a groove formed on the circumferential surface of the handle. With this structure, by associating the groove with information such as the type of sewing machine needle (e.g., needle number, product name, etc.), it becomes easier to visually identify the type of sewing machine needle.

[0013] Furthermore, the groove is formed continuously over the entire circumference, making it easy to identify the type of sewing machine needle regardless of the needle's orientation. Attached Figure Description

[0014] Figure 1 (a) is the front view of the sewing machine needle. Figure 1 (b) is a side view of the sewing machine needle. Figure 1 (c) is a rear view of the sewing machine needle. Figure 1 (d) is a cross-sectional view of the sewing machine needle.

[0015] Figure 2 This is a magnified view of a section near the groove. Figure 2(a) is the front view. Figure 2 (b) is a sectional view.

[0016] Figure 3 This diagram illustrates the state of a sewing machine needle being installed in the needle holder of the sewing machine.

[0017] Figure 4 This is a diagram showing the sewing machine needle obtained by changing the number of grooves. Figure 4 (a) is a front view of a sewing machine needle with a single groove. Figure 4 (b) is a front view of a sewing machine needle with two grooves. Figure 4 (c) is a front view of a sewing machine needle with three grooves. Figure 4 (d) is the front view of a sewing machine needle with four grooves.

[0018] Figure 5 This is an example of a table showing the correspondence between the number of slots and their corresponding numbers.

[0019] Figure 6 This is the front view of a sewing machine needle where the groove intersects with the front groove.

[0020] Figure 7 This is a front view of a sewing machine needle with coating in the groove.

[0021] Figure 8 This diagram illustrates the state in which a sewing machine needle with a groove formed at the threaded fixing position is installed in the needle fixing part of the sewing machine.

[0022] Explanation of reference numerals in the attached figures

[0023] 10. Sewing machine needle; 11. Handle; 12. Groove; 12a. First groove; 12b. Second groove; 12c. Third groove; 12d. Fourth groove; 13. Taper; 20. Needle bar; 21. Thread hole; 22. Front groove; 23. Recess; 24. Back groove; 28. Needle tip; 31. Needle fixing part; 32. Needle fixing screw. Detailed Implementation

[0024] Embodiments of the present invention will be described with reference to the accompanying drawings.

[0025] In this embodiment, the sewing machine needle 10 is mounted on... Figure 3 The needle fixing part 31 of the sewing machine shown is used. The needle fixing part 31 moves up and down during the operation of the sewing machine, and the sewing is performed by the sewing machine needle 10, which moves back and forth integrally with the needle fixing part 31.

[0026] exist Figure 3In the example shown, multiple sewing machine needles 10 can be mounted parallel to each other on the needle fixing part 31. The needle fixing part 31 has multiple mounting holes through which the sewing machine needles 10 can be inserted from below. Furthermore, the needle fixing part 31 includes a needle fixing screw 32 that can move in and out of the mounting holes. When tightening the needle fixing screw 32, the sewing machine needle 10 inserted into the mounting hole can be pressed and fixed by moving the needle fixing screw 32 into the mounting hole. In this way, the sewing machine needle 10 of this embodiment is mounted to the sewing machine by threaded fastening.

[0027] like Figure 1 As shown, the sewing machine needle 10 includes: a handle 11, which is mounted on the sewing machine; a needle bar 20, which is located at a position closer to the top end of the handle 11; and a cone 13, which connects the handle 11 and the needle bar 20.

[0028] like Figure 3 As shown, the handle 11 is the part that is held in place by the needle fixing part 31 of the sewing machine. The handle 11 is formed into a cylindrical shape with a fixed thickness.

[0029] The cone portion 13 is a frustum-shaped portion located between the shank portion 11 and the needle bar portion 20. The cone portion 13 is formed such that its diameter gradually decreases as it moves toward the tip.

[0030] The needle bar 20 is the part that can penetrate the fabric to be sewn. The tip of the needle bar 20 is sharp, forming a needle tip 28. A thread hole 21 for thread to pass through is formed near the tip of the needle bar 20.

[0031] like Figure 1 As shown in (a), a front groove 22 is formed on the front side of the needle bar 20 to guide the thread from the position of the thread hole 21 toward the handle 11.

[0032] In addition, such as Figure 1 As shown in (c), a recess 23 is formed on the back side of the needle bar 20, at a position closer to the handle 11 than the thread hole 21. Figure 1 As shown in (b), the recessed portion 23 is formed in a shape that makes the outer surface of the needle bar portion 20 recessed.

[0033] Furthermore, a back groove 24 for the back guide line is formed at a position closer to the handle 11 than the recess 23.

[0034] In addition, such as Figure 1 and Figure 2 As shown, in this embodiment, a groove 12 that is continuous over the entire circumference is formed on the circumferential surface of the handle 11. The groove 12 is formed by engraving the surface of the handle 11. In this embodiment, each groove 12 is formed to have the same width, with the width remaining constant over the entire circumference.

[0035] In this embodiment, the groove 12 is associated with the type of sewing machine needle 10 (e.g., needle number, product name, etc.), and the type of sewing machine needle 10 can be identified by referring to the groove 12. For example, the product name of the sewing machine needle 10 can be specified by providing the groove 12.

[0036] Furthermore, the type of sewing machine needle 10 can be determined by the color applied, but if only color is applied, the paint may peel off or the visibility may be poor. However, if the groove 12 is formed as in this embodiment, the paint will not peel off, and the visibility can be improved because the outline of the needle changes.

[0037] Furthermore, since the groove 12 is formed continuously over the entire circumference, the type of sewing machine needle 10 can be identified regardless of the orientation of the sewing machine needle 10 (whether observing the front side or the back side of the sewing machine needle 10).

[0038] Furthermore, the groove 12 also improves the heat dissipation of the sewing machine needle 10. During high-speed sewing operations, the sewing machine needle 10 can sometimes reach very high temperatures (around 200°C) due to frictional heat. Even in this situation, the heat dissipation effect can be improved by forming the groove 12 and increasing the surface area. Improving heat dissipation, for example, reduces the possibility of burns when changing needles.

[0039] Furthermore, by providing this groove 12, the flow of machine oil to the needle tip can be suppressed even if machine oil leaks from the sewing machine. For example, even if the oil leaking from the sewing machine is transmitted to the needle fixing part 31 and flows to the sewing machine needle 10, the groove 12 can be used to temporarily block the oil, thus creating a structure in which oil is difficult to adhere to the sewn object.

[0040] also, Figure 1 and Figure 2 The sewing machine needle 10 shown has three grooves 12, which are formed with the same shape and the same width. However, it is not limited to this, and the shape, width and number of grooves 12 can be freely set.

[0041] For example, such as Figure 4 As shown, multiple sewing machine needles 10 with different numbers of grooves 12 can also be used. Furthermore, the type of sewing machine needle 10 can be identified by corresponding the number of grooves 12 to the type of sewing machine needle 10. That is, the type of sewing machine needle 10 can also be represented by the number of grooves 12. As an example, the number of grooves 12 can be increased each time the number of the sewing machine needle 10 is increased.

[0042] Alternatively, multiple slots 12 can be used for binary counting to represent the type of needle. That is, multiple slots 12 can be associated with individual bits of a binary number, with the presence or absence of a slot 12 indicating either a "0" or a "1". Specifically, in the arrangement of multiple slots 12, the nth slot (where n is a natural number) represents the bit of "2 to the power of (n-1)". If the nth slot is present, the bit of "2 to the power of (n-1)" is "1", or it can be "0". Using slots 12 for binary counting in this way allows for the representation of more information than the number of slots 12 can handle.

[0043] For example, such as Figure 4 As shown in (d), with a maximum of four slots 12, 16 representations can be made using 2 to the power of 4 (15 representations can be made if there are no slots 12). Figure 5 This is an example of a table showing the correspondence between slot 12 and pin number when slot 12 is used to indicate pin number. In this example, a maximum of four slots 12 can be used, and the four slots 12 are designated sequentially from the top side as slot 12a, slot 2b, slot 3c, and slot 4d (see reference). Figure 4 (d) In this case, the first slot 12a represents the binary 1 digit, the second slot 12b represents the binary 2 digit, the third slot 12c represents the binary 4 digit, and the fourth slot 12d represents the binary 8 digit. Thus, for example, if only the first slot 12a is engraved, it represents binary "0001" = decimal "1". Furthermore, if all slots 12 are engraved, it represents binary "1111" = decimal "15". Therefore, except for the absence of slots 12, the numbers 1 to 15 can be represented. Figure 5 In the example, as the number represented by slot 12 increases, the needle number also increases.

[0044] Furthermore, although not shown, multiple sewing machine needles 10 with different shapes of the groove 12 can be used. For example, the shape of the groove 12 can be varied not only by making it straight, but also by making it wavy, serrated, or by changing the angle of the groove 12 relative to the length direction of the sewing machine needle 10. Moreover, by making the shape of the groove 12 correspond to the type of sewing machine needle 10, the type of sewing machine needle 10 can be identified based on the shape of the groove 12. That is, the type of sewing machine needle 10 can also be represented by the shape of the groove 12.

[0045] Additionally, although not shown, multiple sewing machine needles 10 with different widths of the groove 12 can be used. Furthermore, the type of sewing machine needle 10 can be identified by corresponding the width of the groove 12 to the type of sewing machine needle 10. That is, the type of sewing machine needle 10 can also be represented by the width of the groove 12.

[0046] Furthermore, in cases where the type of sewing machine needle 10 can be identified based on the shape, width, and number of grooves as described above, the type of sewing machine needle 10 can be identified based on any one of the shape, width, and number of grooves, or it can be identified based on a combination of two or more of the shape, width, and number of grooves.

[0047] in addition, Figure 6 This is a diagram illustrating a variation of this embodiment. As shown... Figure 6 As shown, the front groove 22 can also be extended and formed to intersect with the groove 12. In this case, the back groove 24 is preferably aligned with... Figure 1 Similarly, (c) does not intersect with the groove 12. That is, it can also be configured such that the front groove 22 intersects with the groove 12 and the back groove 24 does not intersect with the groove 12. With such a structure, the side where the grooves intersect is the front side, so the front and back sides can be easily identified when the sewing machine needle 10 is installed on the needle holder 31. That is, in conventional sewing machine needles 10, it is difficult to know the front and back sides of the sewing machine needle 10, especially with finer-numbered sewing machine needles 10, which sometimes leads to installation errors. In this regard, if the front groove 22 is configured to intersect with the groove 12, the operator can easily identify the front and back sides of the sewing machine needle 10, and installation errors can be prevented.

[0048] in addition, Figure 7 This is a diagram illustrating another variation of this embodiment. As shown... Figure 7 As shown, paint can also be applied to the tank 12. By applying paint to the tank 12 in this way, the tank 12 becomes more visible. In addition, by applying paint to the tank 12, the paint is less likely to peel off.

[0049] in addition, Figure 8 This is a diagram illustrating another variation of this embodiment. As shown... Figure 8 As shown, the groove 12 can also be formed at the threaded fixing position of the needle fixing part 31. That is, when the sewing machine needle 10 is installed in the sewing machine, the groove 12 is formed at a position where the top of the needle fixing screw 32 enters the interior of the groove 12. If it is set in this way, the groove 12 can be used to prevent the sewing machine needle 10 from falling off.

Claims

1. A sewing machine needle comprising a cylindrical shank of a fixed thickness and circular cross-section mounted on a sewing machine, and a needle bar located at a position closer to the top of the shank, wherein... A front groove is formed on the front side of the needle bar to guide the thread toward the thread hole. A groove that is continuous over the entire circumference is formed on the circumferential surface of the handle. The front groove is formed to the position where it intersects with the groove portion. A back groove is formed on the back side of the needle bar to guide the thread toward the thread hole, and the back groove does not intersect with the groove portion.

2. The sewing machine needle according to claim 1, wherein, The type of needle can be identified based on at least one of the shape, width, and number of grooves.

3. The sewing machine needle according to claim 1 or 2, wherein, The type of needle can be identified by using binary counting through multiple slots.

4. The sewing machine needle according to claim 1 or 2, wherein, The tank is coated with paint.

5. The sewing machine needle according to claim 1 or 2, wherein, The sewing machine needle is fixed to the sewing machine by threads. The groove is formed at the location where the thread is fixed.

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