Adjustable sewing machine body crank arm

Abstract

The utility model discloses an adjustable sewing machine body crank arm. The base can be fixed on a fixed table top, a rotating shaft protrudes from the top end of the base, the suspension arm is provided with a shaft hole, the shaft hole is sleeved on the outer edge of the rotating shaft in a sliding mode, and a fixed end is formed at one end of the crank arm and used for being connected with a sewing machine body in a locking mode. The crank arm can slide up and down on the rotating shaft to adjust the height from the sewing machine body to the fixed table top in a linkage mode, and the crank arm can rotate around the axis of the rotating shaft to adjust the feeding angle of the sewing machine body in a linkage mode.

Description

Technical Field

[0001] The utility model relates to a curved arm for fixing a sewing machine body, in particular to an adjustable curved arm for a sewing machine body which can adjust the height and the installation angle of the sewing machine upward and downward. Background Art

[0002] Sewing machines used in specific sewing occasions often use a curved arm to fix the sewing machine body to prevent the sewing machine from blocking the cloth feeding path. For example, as shown in Utility Model Patent No. I707999, No. I585462 or M524354, the curved arm of the curved arm sewing machine of the above-mentioned patents is integrally formed from steel and is used to be fixed on a fixed table. Since it is integrally formed, the height of the installed sewing machine body from the fixed table and the angle of the sewing machine body are the same. However, the height of the sewing machine operator is different, and each operator has different usage habits. Therefore, if the sewing machine is installed at a height or angle that does not suit the operator, the operator will easily develop arm pain and other diseases after long-term operation, and there is a need for improvement.

[0003] In view of this, the inventor of the utility model in this case conducted research and innovation, and finally disclosed the adjustable sewing machine body crank arm shown in the utility model. Utility Model Content

[0004] The main technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art and provide an adjustable sewing machine body crank arm, by which the crank arm can slide up and down on the rotating shaft to link the height of the sewing machine body from the fixed table top, and the crank arm can be rotated and adjusted according to the axis of the rotating shaft to link the feeding angle of the sewing machine body.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An adjustable sewing machine body crank arm comprises: a base which can be fixed on a fixed table, a rotating shaft protruding from the top of the base; and a crank arm which is provided with an axial hole so that the axial hole is slidably sleeved on the outer edge of the rotating shaft, and one end of the crank arm forms a fixed end for locking the sewing machine body, and the crank arm is radially provided with a tightening groove from the hole wall of the axial hole, and at least one bolt or screw is radially passed through the tightening groove and locked into one side of the tightening groove to tighten and fix the crank arm on the rotating shaft, so as to position the height and angle of the sewing machine body installed on the crank arm.

[0007] The utility model discloses an adjustable sewing machine body crank arm, wherein a first mark is arranged at the top of the rotating shaft, and a second mark is arranged at the top of the crank arm, so that the first and second marks correspond to each other and define the preset installation angle position of the base and the crank arm.

[0008] The adjustable sewing machine body crank arm disclosed in the utility model further comprises a height positioning device, comprising a screw rod, a first end of the screw rod is locked in the base or the crank arm, and a second end of the screw rod is supported on the crank arm or the base.

[0009] The utility model discloses an adjustable sewing machine body crank arm, wherein the top end of the screw rod comprises a head, and the outer edge of the head is provided with a driving plane.

[0010] The utility model discloses an adjustable sewing machine body crank arm. The screw rod is threaded with at least one nut, and the nut is pressed tightly on the base or the head.

[0011] The beneficial effect of the utility model is that the crank arm can slide up and down on the rotating shaft to adjust the height of the sewing machine body from the fixed table top in a linked manner, and the crank arm can be rotated and adjusted according to the axis of the rotating shaft to adjust the feeding angle of the sewing machine body in a linked manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is an exploded three-dimensional schematic diagram of the utility model.

[0014] Figure 2 It is a three-dimensional schematic diagram of the utility model after assembly.

[0015] Figure 3 It is a schematic diagram of the height adjustment of the utility model.

[0016] Figure 4 It is a schematic diagram of the angle adjustment of the utility model.

[0017] Description of the numbers in the figure:

[0018] 10 Base 11 Shaft 12 First mark

[0019] 20 crank arm 21 shaft hole 22 fixed end

[0020] 23 Clamping groove 24 Second mark 30 Sewing machine body

[0021] 40 Height positioning device 41 Screw rod 42 Nut

[0022] 43 Head 431 Drive plane A angle

[0023] H Height S Bolt or Screw DETAILED DESCRIPTION

[0024] See also Figures 1 to 4As shown, the utility model is related to an adjustable sewing machine body crank arm, comprising: a base 10, which can be fixed on a fixed table, and a rotating shaft 11 protrudes from the top of the base 10; and a crank arm 20, which is penetrated with an axial hole 21, so that the axial hole 21 is slidably sleeved on the outer edge of the rotating shaft 11, so that the crank arm 20 can move up and down along the rotating shaft 11, and one end of the crank arm 20 forms a fixed end 22 for locking the sewing machine body 30, and the crank arm 20 is radially opened from the hole wall of the axial hole 21 to the outside to form a tightening groove 23, and at least one bolt or screw S is radially passed through the tightening groove 23 and locked into one side of the tightening groove 23, so as to tighten and fix the crank arm 20 on the rotating shaft 11, so as to position the height and angle of the sewing machine body 30 installed on the crank arm 20.

[0025] like Figure 2 , 4 As shown, the adjustable sewing machine body crank arm disclosed in the utility model has a first mark 12 at the top of the rotating shaft 11, and a second mark 24 at the top of the crank arm 20, so that when the first and second marks 12 and 24 are aligned with each other, the base 10 and the crank arm 20 are defined as the preset installation angle position.

[0026] like Figure 1 , 2 As shown in FIG. 3 , the adjustable sewing machine body crank arm disclosed in the utility model further comprises a height positioning device 40, comprising a screw rod 41, a first end of the screw rod 41 is locked in the base 10 or the crank arm 20, and a second end of the screw rod 41 is supported on the crank arm 20 or the base 10. Thus, the height of the crank arm 20 can be stabilized by the height positioning device 40.

[0027] In the height positioning device 40 , the second end of the screw rod 41 comprises a head 43 , and the outer edge of the head 43 is provided with a driving plane 431 for the user to rotate the screw rod with a tool such as a wrench.

[0028] Figure 1 , 2 As shown in FIG. 3 , the utility model discloses an adjustable sewing machine body crank arm. On the screw rod 41 of the height positioning device 40, at least one nut 42 is screwed. The nut 42 is tightened on the base 10 or the head 43 to prevent the crank arm 20 from sliding downward from the rotating shaft 11.

[0029] The adjustable sewing machine body crank arm disclosed in the utility model can be assembled by loosening the bolt or screw S to Figure 3 As shown, the crank arm 20 is adjusted up and down along the rotating shaft 11 to adjust the height H of the sewing machine body 30 from the fixed table, or as shown in FIG. Figure 4 As shown, the angle A of the crank arm 20 is adjusted by rotating the axis of the rotating shaft 11 to meet the use requirements of different operators.

[0030] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An adjustable sewing machine body crank arm, characterized in that: include: A base is fixed on a fixed desktop, and a rotating shaft protrudes from the top of the base: and The crank arm is provided with an axial hole, so that the axial hole is slidably sleeved on the outer edge of the rotating shaft, and one end of the crank arm forms a fixed end for locking the sewing machine body, and the crank arm is radially opened with a tightening groove from the hole wall of the axial hole to the outside, and at least one bolt or screw is radially passed through the tightening groove and locked into one side of the tightening groove to tighten the crank arm to the rotating shaft.

2. The adjustable sewing machine body crank arm according to claim 1, characterized in that: A first mark is arranged at the top of the rotating shaft, and a second mark is arranged at the top of the crank arm, so that the first mark and the second mark correspond to each other and define the preset installation angle position of the base and the crank arm.

3. The adjustable sewing machine body crank arm according to claim 1, characterized in that: It further comprises a height positioning device, which comprises a screw rod, wherein the first end of the screw rod is locked in the base or the crank arm, and the second end of the screw rod is supported on the crank arm or the base.

4. The adjustable sewing machine body crank arm according to claim 3, characterized in that: The top end of the screw rod comprises a head, and the outer edge of the head is provided with a driving plane.

5. The adjustable sewing machine body crank arm according to claim 3, characterized in that: At least one nut is threadedly engaged with the screw rod, and the nut is pressed tightly against the base.

6. The adjustable sewing machine body crank arm according to claim 4, characterized in that: At least one nut is threadedly engaged with the screw rod, and the nut is pressed tightly against the head.

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