Thread barrel mounting assembly of sewing machine

Abstract

The utility model belongs to the technical field of sewing machines, and relates to a thread barrel mounting assembly of a sewing machine, which comprises a thread barrel mounting plate fixed on the sewing machine, a positioning cylinder is fixed on the thread barrel mounting plate, and the outer end of the positioning cylinder is screwed with an adjusting screw and is provided with a lower top plate. The rod portion of the adjusting screw is sleeved with an upper pressing plate and limited through the head of the adjusting screw, an elastic sleeve is arranged between the lower top plate and the upper pressing plate, the rod portion of the adjusting screw is sleeved with the elastic sleeve, the two ends of the elastic sleeve are connected with the lower top plate and the upper pressing plate in an abutting mode respectively, and when the adjusting screw is screwed tightly, the upper pressing plate moves towards the lower top plate and extrudes the elastic sleeve. The elastic sleeve expands in the radial direction and forms a fixing structure abutting against an inner hole of the wire barrel. According to the thread barrel installation assembly of the sewing machine, the thread barrel can be conveniently installed and detached, and the thread barrel installation assembly can be matched with thread barrels of different specifications.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines and relates to a thread barrel installation component of a sewing machine. Background Art

[0002] The sewing machine thread barrel is a necessary accessory when using the sewing machine. Before using the sewing machine, the required thread barrel needs to be installed on the thread barrel mounting part. When the sewing thread on the thread barrel is used up or a different sewing thread is replaced, the previous thread barrel needs to be removed and then a new thread barrel needs to be installed. The existing thread barrel mounting structure generally uses fasteners to fix the thread barrel on the thread barrel mounting part, but the thread barrel is generally covered with a thread barrel protective cover, and the thread barrel installation position is very narrow. These factors will make the installation and removal of the thread barrel very troublesome. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a thread barrel installation component for a sewing machine, which facilitates the installation and disassembly of the thread barrel and can also be adapted to thread barrels of different specifications.

[0004] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0005] A wire barrel mounting assembly for a sewing machine comprises a wire barrel mounting plate fixed on the sewing machine, a positioning cylinder being fixed on the wire barrel mounting plate, an adjusting screw being screwed on the outer end of the positioning cylinder and a lower top plate being provided, the rod portion of the adjusting screw is sleeved with an upper pressure plate and limited by its head, an elastic sleeve is provided between the lower top plate and the upper pressure plate, the elastic sleeve is sleeved on the rod portion of the adjusting screw and the two ends are respectively connected with the lower top plate and the upper pressure plate in abutment with each other, when the adjusting screw is tightened, the upper pressure plate moves in the direction of the lower top plate and squeezes the elastic sleeve, and the elastic sleeve expands radially and forms a fixed structure in abutment with the inner hole of the wire barrel.

[0006] In the above-mentioned thread barrel installation assembly of a sewing machine, the positioning cylinder, the lower top plate, the upper pressure plate and the adjusting screw are all coaxially arranged. Furthermore, a through hole with an internal thread is arranged at the axis of the positioning cylinder, and the adjusting screw is screwed into the through hole.

[0007] In the above-mentioned thread barrel installation assembly of a sewing machine, the positioning cylinder and the lower top plate are an integrated structure. Further, the lower top plate is formed by expanding the outer end of the positioning cylinder.

[0008] In the above-mentioned thread barrel installation assembly of a sewing machine, the inner hole of the elastic sleeve is provided with an arc chamfer, the outer side surface of the lower top plate is provided with a lower arc surface matched with the chamfer, and the inner side surface of the upper pressing plate is provided with an upper arc surface matched with the chamfer. After installation, the two ends of the elastic sleeve are respectively fitted with the lower arc surface and the upper arc surface, and the lower arc surface and the upper arc surface form a wrapping structure of the inner hole of the elastic sleeve. Preferably, the lower top plate and the upper pressing plate have the same radial size.

[0009] In the above-mentioned thread barrel installation assembly of a sewing machine, the inner end of the positioning cylinder is fixed to the outer installation plane of the thread barrel installation plate by two or more fastening screws. Furthermore, the fastening screw passes through the thread barrel installation plate from the other side of the outer installation plane and is screwed and fixed to the positioning cylinder.

[0010] In the above-mentioned thread barrel mounting assembly of a sewing machine, the radial dimension of the inner end of the positioning cylinder is greater than the radial dimension of the outer end.

[0011] In the above-mentioned thread barrel installation assembly of a sewing machine, the outer end of the adjusting screw is provided with a tooling slot that matches with the tooling. Preferably, the tooling slot is a hexagonal socket.

[0012] In the above-mentioned wire barrel installation assembly of a sewing machine, a wire barrel protective cover made of a transparent material is disposed outside the wire barrel, the wire barrel protective cover is coaxially arranged with the positioning cylinder, and the wire barrel protective cover is fixed to the outer mounting plane of the wire barrel mounting plate through a connecting piece. Further, the connecting piece includes an annular connecting portion sleeved outside the wire barrel protective cover and an axially arranged fixed connecting portion, the fixed connecting portion extends to the wire barrel mounting plate and is fixedly connected to the wire barrel mounting plate through a fastener.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model provides a thread barrel installation assembly for a sewing machine. The elastic sleeve is squeezed by an adjusting screw to cause radial elastic deformation of the elastic sleeve. When the radial size of the elastic sleeve expands to a certain extent (at least larger than the diameter of the inner hole of the thread barrel), the thread barrel is put on the installation assembly, and the elastic sleeve contacts the inner hole of the thread barrel. The elastic sleeve supports the thread barrel due to the elastic deformation, and the friction between the two fixes the thread barrel. After the elastic sleeve is adjusted to a suitable size, installation and removal of the thread barrel only requires insertion and removal, which is very convenient. When it is necessary to replace thread barrels of different specifications, the radial size of the elastic sleeve can also be changed by adjusting the screw to adapt to thread barrels of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereogram of the utility model in its initial state;

[0016] Figure 2It is a cross-sectional view of the utility model in its initial state;

[0017] Figure 3 It is a three-dimensional diagram of the utility model in use state;

[0018] Figure 4 It is a cross-sectional view of the utility model when in use;

[0019] Figure numerals: 1. wire barrel mounting plate; 2. positioning cylinder; 3. adjusting screw; 4. lower top plate; 5. upper pressure plate; 6. elastic sleeve; 7. lower arc surface; 8. upper arc surface; 9. fastening screw; 10. tooling slot. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings. Figure 1-4 :

[0021] A wire barrel mounting assembly for a sewing machine comprises a wire barrel mounting plate 1 fixed on the sewing machine, a positioning cylinder 2 being fixed on the wire barrel mounting plate 1, an adjusting screw 3 being screwed on the outer end of the positioning cylinder 2 and a lower top plate 4 being provided, the rod of the adjusting screw 3 being sleeved with an upper pressure plate 5 and being limited by its head, an elastic sleeve 6 being provided between the lower top plate 4 and the upper pressure plate 5, the elastic sleeve 6 being sleeved on the rod of the adjusting screw 3 and having its two ends respectively being in contact with the lower top plate 4 and the upper pressure plate 5, when the adjusting screw 3 is tightened, the upper pressure plate 5 moves in the direction of the lower top plate 4 and squeezes the elastic sleeve 6, the elastic sleeve 6 expands radially and forms a fixed structure in contact with the inner hole of the wire barrel.

[0022] During installation, first install the thread barrel mounting plate 1 on the sewing machine, fix the positioning cylinder 2 on the thread barrel mounting plate 1, then insert the upper pressing plate 5 and the elastic sleeve 6 into the adjusting screw 3 in sequence, and then screw the adjusting screw 3 into the internal thread hole of the positioning cylinder 2. Figure 1 and attached Figure 2 In the initial state, the lower top plate 4 and the upper pressure plate 5 are in contact with the two ends of the elastic sleeve 6 respectively, but do not squeeze the elastic sleeve 6. At this time, the radial dimension of the elastic sleeve 6 is the smallest initial dimension. During adjustment, the adjusting screw 3 is turned in the tightening direction, and the upper pressure plate 5 moves toward the lower pressure plate together with the head of the adjusting screw 3. The distance between the upper pressure plate 5 and the lower top plate 4 is reduced, and the elastic sleeve 6 is squeezed. The radial dimension of the squeezed elastic sleeve 6 becomes larger, and the greater the tightening amount of the adjusting screw 3, the more the elastic sleeve 6 is squeezed, and the larger its radial dimension. When the appropriate radial dimension is adjusted, stop adjusting. After the adjustment is completed, an attached Figure 3 and attached Figure 4 In this state, after the wire barrel is inserted, the elastic sleeve 6 supports the inner hole of the wire barrel, and the friction between the two fixes the wire barrel. At the same time, the radial size of the elastic sleeve 6 must also meet the requirements for smooth insertion and removal of the wire barrel.

[0023] Preferably, the positioning cylinder 2, the lower top plate 4, the upper pressure plate 5 and the adjusting screw 3 are all coaxially arranged. Further, a through hole with an internal thread is arranged at the axis of the positioning cylinder 2, and the adjusting screw 3 is screwed into the through hole.

[0024] Preferably, the positioning cylinder 2 and the lower top plate 4 are an integrated structure. Further, the lower top plate 4 is formed by expanding the outer end of the positioning cylinder 2.

[0025] The inner hole of the elastic sleeve 6 is provided with an arc chamfer, the outer side surface of the lower top plate 4 is provided with a lower arc surface 7 matched with the chamfer, and the inner side surface of the upper pressure plate 5 is provided with an upper arc surface 8 matched with the chamfer. After installation, the two ends of the elastic sleeve 6 are respectively fitted with the lower arc surface 7 and the upper arc surface 8, and the lower arc surface 7 and the upper arc surface 8 form a wrapping structure of the inner hole of the elastic sleeve 6. Preferably, the lower top plate 4 and the upper pressure plate 5 have the same radial size. Through the above structure, the elastic sleeve 6 can be more easily deformed outward rather than inward when squeezed. The shape of the elastic sleeve 6 after deformation can also be made more stable.

[0026] The installation method of the positioning cylinder 2 in this embodiment is as follows: the inner end of the positioning cylinder 2 is fixed to the outer mounting plane of the wire barrel mounting plate 1 by two or more fastening screws 9. Furthermore, the fastening screws 9 pass through the wire barrel mounting plate 1 from the other side of the outer mounting plane and are screwed and fixed to the positioning cylinder 2.

[0027] The radial dimension of the inner end of the positioning cylinder 2 is larger than the radial dimension of the outer end. Since the inner hole of the wire barrel is not of equal diameter, a conical structure with an expanded diameter is generally provided at the bottom. The positioning cylinder 2 of this structure can better adapt to the inner hole structure of the wire barrel, making it easier to insert the wire barrel, and can also save materials for manufacturing the positioning cylinder 2.

[0028] In order to facilitate the turning of the adjusting screw 3, a tooling slot 10 for cooperating with a tooling is provided at the outer end of the adjusting screw 3. Preferably, the tooling slot 10 is a hexagonal socket.

[0029] The wire barrel is provided with a wire barrel protective cover made of a transparent material on the outer surface, the wire barrel protective cover is coaxially arranged with the positioning cylinder 2, and the wire barrel protective cover is fixed to the outer mounting plane of the wire barrel mounting plate 1 through a connecting piece. Further, the connecting piece includes an annular connecting portion sleeved outside the wire barrel protective cover and an axially arranged fixed connecting portion, the fixed connecting portion extends to the wire barrel mounting plate 1 and is fixedly connected to the wire barrel mounting plate 1 through a fastener.

[0030] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A thread barrel mounting assembly for a sewing machine, comprising a thread barrel mounting plate (1) fixed to the sewing machine, characterized in that: A positioning cylinder (2) is fixed on the wire barrel mounting plate (1), an adjusting screw (3) is screwed on the outer end of the positioning cylinder (2) and a lower top plate (4) is provided, the rod of the adjusting screw (3) is sleeved with an upper pressure plate (5) and limited by its head, an elastic sleeve (6) is provided between the lower top plate (4) and the upper pressure plate (5), the elastic sleeve (6) is sleeved on the rod of the adjusting screw (3) and the two ends are respectively connected to the lower top plate (4) and the upper pressure plate (5) in abutment with each other, when the adjusting screw (3) is tightened, the upper pressure plate (5) moves in the direction of the lower top plate (4) and squeezes the elastic sleeve (6), and the elastic sleeve (6) expands radially to form a fixed structure that abuts against the inner hole of the wire barrel.

2. A thread barrel installation assembly for a sewing machine according to claim 1, characterized in that: The positioning cylinder (2), the lower top plate (4), the upper pressure plate (5) and the adjusting screw (3) are all coaxially arranged.

3. The thread barrel installation assembly of a sewing machine according to claim 1, characterized in that: The positioning cylinder (2) and the lower top plate (4) are an integrated structure.

4. The thread barrel installation assembly of a sewing machine according to claim 1, characterized in that: The inner hole of the elastic sleeve (6) is provided with an arc chamfer, the outer side surface of the lower top plate (4) is provided with a lower arc surface (7) matching with the chamfer, and the inner side surface of the upper pressure plate (5) is provided with an upper arc surface (8) matching with the chamfer, and the lower arc surface (7) and the upper arc surface (8) form a wrapping structure of the inner hole of the elastic sleeve (6).

5. The thread barrel installation assembly of a sewing machine according to claim 1, characterized in that: The inner end of the positioning cylinder (2) is fixed to the outer mounting plane of the barrel mounting plate (1) by means of two or more fastening screws (9).

6. The thread barrel installation assembly of a sewing machine according to claim 1, characterized in that: The radial dimension of the inner end of the positioning cylinder (2) is greater than the radial dimension of the outer end.

7. The thread barrel installation assembly of a sewing machine according to claim 1, characterized in that: The outer end of the adjusting screw (3) is provided with a tooling groove (10) that matches with the tooling.

8. The thread barrel installation assembly of a sewing machine according to claim 1, characterized in that: The outer shell of the wire barrel is provided with a wire barrel protective cover made of a transparent material. The wire barrel protective cover is coaxially arranged with the positioning cylinder (2). The wire barrel protective cover is fixed to the outer mounting plane of the wire barrel mounting plate (1) via a connecting piece.

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