A bobbin case

Abstract

The utility model discloses a bobbin case, including a shell, wherein a rotating disk is rotatably connected inside the shell, a center tube is fixedly connected to the top of the rotating disk, four vertical slots are opened on the center tube, an inner support is fixedly installed inside the center tube, the inner support cooperates with the four vertical slots, an adjusting member is installed on the shell, and a bobbin body is sleeved on the outer side of the center tube. The utility model clamps and positions the bobbin body by the reaction force generated by the extrusion of the inner support, so that the bottom surface of the bobbin body fits and clamps with the rotating disk, and the installation is completed. The contact pressure between the adjusting member and the bottom surface of the rotating disk is used to adjust the tension of the pay-off, so that the device has the advantages of reducing friction between the bobbin and the inside of the bobbin case when the bobbin is rotating for pay-off, reducing mutual wear, and improving the service life.

Description

Technical Field

[0001] The utility model relates to the field of bobbin cases, and more specifically to a bobbin case. Background Art

[0002] Sewing machines can sew cotton, linen, silk, wool, artificial fiber and other fabrics and leather, plastic, paper and other products. The stitches are neat, beautiful, flat and firm, with fast sewing speed and easy to use. It has also derived art forms such as hand-push embroidery and computer embroidery. The bobbin case of a sewing machine is the outer shell used to fix the bobbin, which is convenient for the bobbin to rotate and produce thread in the bobbin case.

[0003] However, the existing bobbin case generally installs the bobbin inside, and then the bobbin rotates inside the bobbin case through the pulling force of the pulling line to achieve thread release. However, due to the different materials of the bobbin, the friction loss between the bobbin case and the bobbin is large, resulting in a reduction in the life of the bobbin and the bobbin case. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model aims to provide a bobbin case.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A bobbin case comprises a shell, wherein a rotating disk is rotatably connected to the inside of the shell, a center tube is fixedly connected to the top of the rotating disk, four vertical slots are opened on the center tube, an inner support member is fixedly installed inside the center tube, the inner support member cooperates with the four vertical slots, an adjusting member is installed on the shell, a bobbin body is sleeved on the outer side of the center tube, and the inner support member is in extrusion contact with the inner side of the bobbin body.

[0007] As a further description of the above technical solution: the adjusting member includes a T-screw, a sliding block, a spring, a moving block and a first ball, the T-screw is inserted into the interior of the shell and is rotatably connected thereto, the outer side of the sliding block is slidably connected to the inner wall of the shell, one end of the spring is fixedly connected to the sliding block, the other end of the spring is fixedly connected to the moving block, the first ball is rotatably connected to the top of the moving block, and the top end of the T-screw passes through the top of the sliding block and is threadedly connected thereto.

[0008] As a further description of the above technical solution: the inner support component includes two positioning blocks and four arc-shaped spring pieces, the outer sides of the two positioning blocks are fixedly connected to the inside of the central tube, the tops and bottoms of the four arc-shaped spring pieces are respectively fixedly connected to the two positioning blocks, the arc-shaped spring pieces maintain an extruded and bent state, the arc-shaped spring pieces extend outward to the outside of the vertical groove, and the outer sides of the arc-shaped spring pieces are extruded and contacted with the inner side of the bobbin body.

[0009] As a further description of the above technical solution: through holes arranged at equal distances are opened on the extension of the bobbin body, and two positioning rubber blocks are fixedly connected to the top of the rotating disk, and the positioning rubber blocks are plugged and matched with any two corresponding through holes.

[0010] As a further description of the above technical solution: an auxiliary ball is rotatably connected inside the shell, and the auxiliary ball is symmetrically matched with the first ball.

[0011] As a further description of the above technical solution: the shell is a metal shell.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] This solution realizes positioning and synchronous rotation with the bobbin body through the rotating disk and the center tube, and is used in conjunction with the inner support and the adjusting member, thereby realizing the advantages of reducing friction between the bobbin and the inside of the bobbin case when the bobbin is rotating to unwind the thread, reducing mutual wear, and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0016] Figure 3 It is a partial three-dimensional structural schematic diagram of the utility model;

[0017] Figure 4 It is a schematic diagram of the top structure of the utility model.

[0018] Description of the numbers in the figure:

[0019] 1. Shell; 2. Rotating disk; 21. Positioning rubber block; 3. Center tube; 4. Vertical groove; 5. Inner support member; 51. Positioning block; 52. Arc spring; 6. Adjusting member; 61. T-screw; 62. Sliding block; 63. Spring; 64. Moving block; 65. First ball; 7. Bobbin body; 71. Through hole; 8. Auxiliary ball. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention;

[0021] See also Figures 1 to 4In the utility model, a bobbin case includes a shell 1, a rotating disk 2 is rotatably connected to the inside of the shell 1, a center tube 3 is fixedly connected to the top of the rotating disk 2, four vertical grooves 4 are opened on the center tube 3, an inner support member 5 is fixedly installed inside the center tube 3, the inner support member 5 cooperates with the four vertical grooves 4, an adjusting member 6 is installed on the shell 1, a bobbin body 7 is sleeved on the outer side of the center tube 3, and the inner support member 5 is in extrusion contact with the inner side of the bobbin body 7.

[0022] In the present invention, the shell 1 is used as the main body of the device. The central hollow part of the bobbin body 7 is connected to the central tube 3 and inserted into the interior of the shell 1 along the central tube 3. At this time, the inner support member 5 is squeezed, and the reaction force generated clamps and positions the bobbin body 7, so that the bottom surface of the bobbin body 7 is fitted and clamped with the rotating disk 2 to complete the installation. The contact pressure between the adjusting member 6 and the bottom surface of the rotating disk 2 is used to adjust the tension of the wire release, thereby achieving the advantages of reducing friction between the bobbin and the inside of the bobbin case when the wire is released, reducing mutual wear and improving the service life of the device. This solves the problem that the bobbin case in the prior art is generally installed inside the bobbin, and the pulling force of the wire is used to make the bobbin rotate inside the bobbin case to achieve wire release. However, due to the different materials of the bobbin, the friction loss between the bobbin case and the bobbin is large, resulting in the life of the bobbin and the bobbin case being affected and reduced.

[0023] See also Figure 2 , wherein: the adjusting member 6 includes a T-screw 61, a sliding block 62, a spring 63, a moving block 64 and a first ball 65, the T-screw 61 is inserted into the interior of the housing 1 and is rotatably connected thereto, the outer side of the sliding block 62 is slidably connected to the inner wall of the housing 1, one end of the spring 63 is fixedly connected to the sliding block 62, the other end of the spring 63 is fixedly connected to the moving block 64, the first ball 65 is rotatably connected to the top of the moving block 64, and the top end of the T-screw 61 passes through the top of the sliding block 62 and is threadedly connected thereto.

[0024] In the present invention, the sliding block 62 is driven to move vertically by rotating the T-screw 61, and the moving block 64 is pushed by the compression spring 63 to increase the contact pressure between the first ball 65 and the bottom surface of the rotating disk 2, thereby realizing the adjustment of the line release force.

[0025] See also Figure 1 , Figure 3 and Figure 4 , wherein: the inner support member 5 includes two positioning blocks 51 and four arc-shaped spring pieces 52, the outer sides of the two positioning blocks 51 are fixedly connected to the inside of the central tube 3, the tops and bottoms of the four arc-shaped spring pieces 52 are fixedly connected to the two positioning blocks 51 respectively, the arc-shaped spring pieces 52 maintain an extruded and bent state, the arc-shaped spring pieces 52 extend outward to the outside of the vertical groove 4, and the outer sides of the arc-shaped spring pieces 52 are extruded and contacted with the inner side of the bobbin body 7.

[0026] In the utility model, the positioning block 51 and the four arc-shaped spring pieces 52 generate an outward expansion force to squeeze the inner side of the bobbin body 7 to achieve positioning, thereby improving the synchronization stability of the bobbin body 7 and the center tube 3.

[0027] See also Figure 1 , Figure 3 and Figure 4 , wherein: the outer extension of the bobbin body 7 is provided with through holes 71 arranged at equal distances, and the top of the rotating disk 2 is fixedly connected with two positioning rubber blocks 21 , and the positioning rubber blocks 21 are plugged and matched with any two corresponding through holes 71 .

[0028] In the utility model, the bobbin body 7 is positioned by cooperating with the positioning rubber block 21 through the through hole 71 , so that the bobbin body 7 , the center tube 3 and the rotating disk 2 are synchronized and stable.

[0029] See also Figure 1 , wherein: an auxiliary ball 8 is rotatably connected inside the shell 1, and the auxiliary ball 8 is symmetrically matched with the first ball 65.

[0030] In the present invention, the auxiliary ball 8 is symmetrical with the first ball 65, so that when the squeezing force of the first ball 65 on the rotating disk 2 is adjusted, the auxiliary ball 8 is used to balance the rotating disk 2 on the other side to ensure structural stability.

[0031] See also Figure 1 , wherein: the shell 1 is a metal shell.

[0032] In the utility model, the housing 1 is made of a metal shell to achieve greater durability and stability.

[0033] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A bobbin case, comprising a housing (1), characterized in that: The housing (1) is rotatably connected to a rotating disk (2), the top of the rotating disk (2) is fixedly connected to a central tube (3), the central tube (3) is provided with four vertical slots (4), an inner support member (5) is fixedly installed inside the central tube (3), the inner support member (5) cooperates with the four vertical slots (4), an adjusting member (6) is installed on the housing (1), a bobbin body (7) is sleeved on the outer side of the central tube (3), and the inner support member (5) is in extrusion contact with the inner side of the bobbin body (7).

2. A bobbin case according to claim 1, characterized in that: The adjusting member (6) comprises a T-shaped screw (61), a sliding block (62), a spring (63), a moving block (64) and a first ball (65); the T-shaped screw (61) is inserted into the interior of the housing (1) and is rotatably connected thereto; the outer side of the sliding block (62) is slidably connected to the interior of the inner wall of the housing (1); one end of the spring (63) is fixedly connected to the sliding block (62); the other end of the spring (63) is fixedly connected to the moving block (64); the first ball (65) is rotatably connected to the top of the moving block (64); and the top end of the T-shaped screw (61) passes through the top of the sliding block (62) and is threadedly connected thereto.

3. The bobbin case according to claim 1, characterized in that: The inner support member (5) comprises two positioning blocks (51) and four arc-shaped spring pieces (52). The outer sides of the two positioning blocks (51) are fixedly connected to the inside of the central tube (3). The tops and bottoms of the four arc-shaped spring pieces (52) are respectively fixedly connected to the two positioning blocks (51). The arc-shaped spring pieces (52) are kept in an extruded and bent state. The arc-shaped spring pieces (52) extend outward to the outside of the vertical groove (4). The outer sides of the arc-shaped spring pieces (52) are in extruded contact with the inner side of the bobbin body (7).

4. The bobbin case according to claim 1, characterized in that: The outer extension of the bobbin body (7) is provided with through holes (71) arranged at equal distances, and the top of the rotating disk (2) is fixedly connected with two positioning rubber blocks (21), and the positioning rubber blocks (21) are plug-fitted into any two corresponding through holes (71).

5. The bobbin case according to claim 2, characterized in that: An auxiliary ball (8) is rotatably connected inside the housing (1), and the auxiliary ball (8) is symmetrically matched with the first ball (65).

6. The bobbin case according to claim 1, characterized in that: The shell (1) is a metal shell.

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