CN111910352A

CN111910352A - Fixing device for sewing machine needle

Info

Publication number: CN111910352A
Application number: CN202010895932.2A
Authority: CN
Inventors: 莫金连
Original assignee: Guangzhou Fashion Color Clothing Co ltd
Current assignee: Guangzhou Fashion Color Clothing Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-11-10

Abstract

The invention relates to the technical field of sewing machines and discloses a fixing device for a sewing machine needle, which comprises a needle rod, wherein the lower part of the needle rod is in threaded connection with a connecting pipe, the lower part of the connecting pipe is in sliding insertion connection with an ejector pin block, the upper part of the ejector pin block is in sliding connection with a sliding column, the upper end of the sliding column is in rotary connection with a rotary table, a first spring is fixedly connected between the sliding column and the ejector pin block, the lower part of the ejector pin block is in threaded connection with an installation pipe, and the right wall of the installation pipe is fixedly connected with an installation block. This a fixing device for sewing machine needle is through with needle bar and connecting pipe, thimble piece and installation pipe threaded connection for the thimble piece can conveniently be taken off, and the cooperation sets up first spring and reserves the elasticity surplus, cooperates guide block control slide bar again, controls adjusting screw's turnability, thereby has avoided the condition emergence that the eedle location shifts up, has prolonged the life of eedle, has prevented the eedle wire jumper when moving.

Description

Fixing device for sewing machine needle

Technical Field

The invention relates to the technical field of sewing machines, in particular to a fixing device for a sewing machine needle.

Background

The sewing machine needle is a connecting device used for sewing materials in the sewing machine, the needle is also called a sewing needle and is an important component accessory of the sewing machine, the needle needs to be pierced for thousands of times per minute in the process of sewing the fabric, and the needle is contacted with a needle plate, a rotating shuttle and a curved needle after the fabric is pierced through, bears various burdens, and particularly bears larger burdens when being used for thick or hard fabric.

At present, the eedle need be with its fixed mounting in the needle tubing on sewing machine when using, because the eedle need stretch into in the needle tubing completely, and its top need contact with the inner chamber upper wall of needle tubing, in order to accomplish the location, and in long-term use, wearing and tearing can appear in the inner chamber upper wall of needle tubing, if the user still sends the eedle into the needle tubing according to the maximum, then can make the location of eedle shift up, because the needle tubing is generally inconvenient to be changed, continue to use and then can make the location of eedle inaccurate, because the eedle fixed mounting back, general fixing device does not leave the elasticity surplus, make the eedle impaired very easily, and when the eedle location installation is inaccurate, can normally collude the line during the eedle sewing, and then the condition of wire jumper appears.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a fixing device for a sewing machine needle, which has the advantages of avoiding the situation that the sewing needle moves upwards in a positioning way, prolonging the service life of the sewing needle, preventing the needle from jumping during operation and the like, and solves the problems.

(II) technical scheme

In order to achieve the purposes of avoiding the situation of needle positioning and moving upwards, prolonging the service life of the needle, preventing wire jumping during needle operation and the like, the invention provides the following technical scheme: a fixing device for a sewing machine needle comprises a needle rod, wherein the lower part of the needle rod is in threaded connection with a connecting pipe, the lower part of the connecting pipe is in sliding insertion connection with an ejector pin block, the upper part of the ejector pin block is in sliding connection with a sliding column, the upper end of the sliding column is in rotating connection with a rotary table, a first spring is fixedly connected between the sliding column and the ejector pin block, the lower part of the ejector pin block is in threaded connection with an installation pipe, the right wall of the installation pipe is fixedly connected with an installation block, the upper part of the inner cavity of the installation block is in sliding connection with a guide block, a second spring is fixedly connected between the guide block and the inner cavity side wall of the installation block, the left end of the guide block is fixedly connected with an ejector ball extending into the inner cavity of the installation pipe, the inner cavity of the guide block is in sliding connection with a guide rod, the lower part of the inner, the middle part of the adjusting screw rod is fixedly sleeved with a rotating gear, and the lower end of the guide rod is fixedly connected with a slide rod extending to the rotating gear.

Preferably, a limit ring is fixedly welded to the outer side of the needle rod and limits the distance for screwing the connecting pipe onto the needle rod, so that the first spring is compressed within a proper range.

Preferably, the lower end of the needle rod is provided with symmetrical rubber blocks, and the rubber blocks have certain elastic performance, so that the screwing distance of the installation tube on the ejector pin block can be limited, and a certain elastic allowance can be reserved for the needle by matching with the first spring.

Preferably, the guide block is provided with an arc-shaped groove matched with the guide rod, the arc-shaped groove is formed in the guide block from left to right and gradually faces to the lower part, and when the guide block moves to the right, the guide rod drives the sliding rod to lift.

Preferably, the top end of the ejector bead and the lower end of the ejector pin block are located on the same horizontal plane, and when the top end of the machine needle accurately contacts the lower end face of the ejector pin block, the machine needle can extrude the ejector bead to move to the right, so that the rotation capacity of the adjusting screw rod is recovered.

Preferably, the left end of the threaded pipe is provided with a rubber layer, the surface of the rubber layer is rough, and when the threaded pipe is driven to move leftwards for a certain distance, the rubber layer can be contacted with the machine needle, so that the machine needle is firmly fixed.

Preferably, the lower extreme fixedly connected with blade of slide bar, the blade when the eedle is pinpointed, the joint is on rotating gear for adjusting screw can't rotate, avoids then that the eedle is wrong by fixed.

(III) advantageous effects

Compared with the prior art, the invention provides a fixing device for a sewing machine needle, which has the following beneficial effects:

1. this a fixing device for sewing machine needle is through all adopting threaded connection with needle bar and connecting pipe, and between thimble piece and the installation pipe for the lower extreme of thimble piece is by the back of wearing and tearing, can be dismantled alone and get off the change, thereby has avoided the condition emergence that the eedle location shifted up.

2. This a fixing device for sewing machine needle is through cup jointing the connecting tube screw thread on the needle bar for carousel and traveller extrude first spring, make first spring compressed to certain degree, the cooperation is fixed the eedle in the inner chamber of installation pipe, cooperates the rubber block of connecting pipe lower extreme again, and the eedle is reserved certain elasticity surplus promptly, thereby has prolonged the life of eedle.

3. This a fixing device for sewing machine needle through sending into the eedle the installation pipe in, if the eedle tip does not move to thimble piece department, and when not extrudeing the knock-out bead, the blade of slide bar lower extreme then can last the joint between the tooth of rotating gear, prevents adjusting screw to rotate fastening eedle, and then has avoided the inaccurate condition of just fixing it in eedle location to the wire jumper when having prevented the eedle from moving.

Drawings

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a front sectional view of a connecting portion such as a mounting block of the present invention;

FIG. 3 is a front sectional view of a connecting portion of a guide shoe and the like according to the present invention;

FIG. 4 is a front cross-sectional view of a connecting portion of an adjusting screw and the like according to the present invention;

FIG. 5 is a front sectional view of a connection portion of a thimble block and the like according to the present invention;

fig. 6 is a left side view of a connecting portion of a guide shoe and the like of the present invention.

In the figure: 1. a needle bar; 2. a connecting pipe; 3. a thimble block; 4. a traveler; 5. a turntable; 6. a first spring; 7. installing a pipe; 8. mounting blocks; 9. a guide block; 10. a second spring; 11. a top bead; 12. a guide bar; 13. adjusting the screw rod; 14. a threaded pipe; 15. a rotating gear; 16. a slide bar.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, a fixing device for a sewing machine needle comprises a needle bar 1, a connecting pipe 2 is connected to the lower portion of the needle bar 1 in a threaded manner, an ejector pin block 3 is inserted into the lower portion of the connecting pipe 2 in a sliding manner, and the needle bar 1, the connecting pipe 2, the ejector pin block 3 and a mounting pipe 7 are connected in a threaded manner, so that the lower end of the ejector pin block 3 can be detached and replaced independently after being worn, and the situation that the sewing machine needle is positioned and moved upwards is avoided.

The upper portion sliding connection of thimble piece 3 has traveller 4, the upper end of traveller 4 is rotated and is connected with carousel 5, the first spring 6 of fixedly connected with between traveller 4 and the thimble piece 3, through cup jointing 2 screw threads of connecting pipe on needle bar 1, make carousel 5 and traveller 4 extrude first spring 6, make first spring 6 compressed to certain extent, the cooperation is fixed the eedle in the inner chamber of installation pipe 7, the rubber block of the 2 lower extremes of connecting pipe of deuterogamying, the eedle is reserved certain elasticity surplus promptly, thereby the life of eedle has been prolonged.

The lower part of the thimble block 3 is in threaded connection with a mounting tube 7, the right wall of the mounting tube 7 is fixedly connected with a mounting block 8, the upper part of the inner cavity of the mounting block 8 is in sliding connection with a guide block 9, a second spring 10 is fixedly connected between the guide block 9 and the side wall of the inner cavity of the mounting block 8, the left end of the guide block 9 is fixedly connected with a thimble 11 extending into the inner cavity of the mounting tube 7, the inner cavity of the guide block 9 is in sliding connection with a guide rod 12, the lower part of the inner cavity of the mounting block 8 is in rotating connection with an adjusting screw 13, the lower part of the inner cavity of the mounting block 8 is in sliding connection with a threaded tube 14 sleeved on the adjusting screw 13, the middle part of the adjusting screw 13 is fixedly sleeved with a rotating gear 15, the lower end of the guide rod 12 is fixedly connected with a sliding rod 16 extending to the rotating gear 15, when a needle is not moved to the thimble block 3 and the thimble 11 is not extruded, a blade, the adjusting screw 13 is prevented from rotating to fasten the needle, so that the needle is prevented from being fixed due to inaccurate positioning, and the wire jumping during the operation of the needle is prevented.

The working principle is as follows: the fixing device for the sewing machine needle is characterized in that the needle rod 1, the connecting pipe 2, the thimble block 3 and the mounting pipe 7 are in threaded connection, so that the lower end of the thimble block 3 can be independently disassembled and replaced after being worn during daily use, the situation that the needle is positioned and moved upwards is avoided, the connecting pipe 2 is in threaded sleeve connection with the needle rod 1, the needle rod 1 is relatively screwed into the inner cavity of the connecting pipe 2 for a certain distance, the rotary disc 5 and the sliding column 4 can extrude the first spring 6, the first spring 6 is compressed to a certain degree, the needle is fixed in the inner cavity of the mounting pipe 7 in a matching way, the mounting pipe 7 is limited by the rubber block at the lower end of the connecting pipe 2, the needle is reserved with a certain elastic margin, when the needle performs corresponding sewing work, if the counterforce of a sewn fabric on the needle is larger, the needle can extrude the rubber block through the mounting pipe 7, and meanwhile, the thimble block 3 is matched to extrude the first spring 6, so that the service life of the machine needle is prolonged, when the machine needle needs to be replaced and installed, the machine needle can be conveyed into the installation pipe 7, if the end part of the machine needle is not moved to the thimble block 3 and the thimble bead 11 is not extruded, the blade at the lower end of the slide rod 16 can be continuously clamped between the teeth of the rotating gear 15, the adjusting screw 13 is prevented from rotating to fasten the machine needle, the condition that the machine needle is fixed due to inaccurate positioning is avoided, when the machine needle is smoothly conveyed to the lower end part of the thimble block 3, the top part of the machine needle can extrude the thimble bead 11 to the right, the guide block 9 is moved to the right, the guide rod 12 is driven by the guide block 9 to lift the slide rod 16, the blade at the lower end of the slide rod 16 is moved out from the teeth of the rotating gear 15, the adjusting screw 13 is rotated towards a certain direction at the moment, so that the threaded pipe 14, and then can fix the needle to the wire jumper when having prevented the needle operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A fixing device for a sewing machine needle, comprising a needle bar (1), characterized in that: the lower portion of the needle rod (1) is in threaded connection with a connecting pipe (2), the lower portion of the connecting pipe (2) is in sliding insertion connection with an ejector pin block (3), the upper portion of the ejector pin block (3) is in sliding connection with a sliding column (4), the upper end of the sliding column (4) is rotatably connected with a rotary disc (5), a first spring (6) is fixedly connected between the sliding column (4) and the ejector pin block (3), the lower portion of the ejector pin block (3) is in threaded connection with a mounting pipe (7), the right wall of the mounting pipe (7) is fixedly connected with a mounting block (8), the upper portion of the inner cavity of the mounting block (8) is in sliding connection with a guide block (9), a second spring (10) is fixedly connected between the guide block (9) and the inner cavity side wall of the mounting block (8), the left end of the guide block (9) is fixedly connected with an ejector ball (11) extending into the inner cavity of the mounting pipe (7), and the, the lower part of the inner cavity of the mounting block (8) is rotatably connected with an adjusting screw rod (13), the lower part of the inner cavity of the mounting block (8) is slidably connected with a threaded pipe (14) sleeved on the adjusting screw rod (13), the middle part of the adjusting screw rod (13) is fixedly sleeved with a rotating gear (15), and the lower end of the guide rod (12) is fixedly connected with a sliding rod (16) extending to the rotating gear (15).

2. A fastening device for a sewing machine needle according to claim 1, characterized in that: the outer side of the needle rod (1) is fixedly welded with a limiting ring.

3. A fastening device for a sewing machine needle according to claim 1, characterized in that: the lower end of the needle rod (1) is provided with symmetrical rubber blocks.

4. A fastening device for a sewing machine needle according to claim 1, characterized in that: the guide block (9) is provided with an arc-shaped groove matched with the guide rod (12).

5. A fastening device for a sewing machine needle according to claim 1, characterized in that: the top end of the ejector bead (11) and the lower end of the ejector pin block (3) are in the same horizontal plane.

6. A fastening device for a sewing machine needle according to claim 1, characterized in that: the left end of the threaded pipe (14) is provided with a rubber layer.

7. A fastening device for a sewing machine needle according to claim 1, characterized in that: the lower end of the sliding rod (16) is fixedly connected with a blade.