JP5884342B2 - sewing machine - Google Patents

Description

  The present invention relates to a sewing machine including a sewing speed adjusting unit that adjusts a sewing speed.

  As a conventional sewing machine, a bed portion, a pedestal column portion standing from an end portion of the bed portion, and an arm portion extending facing the bed portion from the upper end of the pedestal column portion, the bed portion of the sewing machine, There is a sewing speed adjusting unit provided on the lower surface of the opposing arm, and the sewing speed adjusting unit includes an adjusting unit that adjusts a hanging sewing speed and an operation unit that slides the adjusting unit (for example, see Patent Document 1). .)

JP 2010-207540 A

  However, in the sewing machine of Patent Document 1, when sewing a large object such as a curtain, the cloth becomes a large lump on the right side of the seam, and the suspension type sewing speed is increased by trying to pass under the arm part of the sewing machine. There is a problem that the cloth touches the sewing speed adjusting section to be adjusted and the sewing speed changes.

  The present invention has been made in view of the above problems, and the sewing speed adjustment unit is a sewing machine having an adjustment unit that adjusts the sewing speed, and the sewing speed changes due to factors unintended by the user. It is providing the sewing machine which suppresses.

The first problem-solving means of the present invention includes a bed portion, a pedestal portion standing from the bed portion, an arm portion extending from the pedestal portion so as to face the bed portion, and the arm portion. A sewing machine provided with a sewing speed adjusting unit for adjusting a sewing speed, wherein the sewing speed adjusting unit protrudes from a surface of the arm unit facing a user side when the sewing machine is used, An adjustment portion that adjusts a sewing speed by moving relative to the adjustment portion, and an operation portion that is supported by the adjustment portion and that can protrude downward from the adjustment portion. The operation portion is formed in the operation portion. The substantially U-shaped groove formed is fitted into a male hinge formed at the tip of the adjustment portion, and the sewing speed adjustment portion is suspended below the adjustment portion and protrudes from the first state. When the operation portion on a surface facing the user side of the adjusting unit A is freely displaceable arrangement and a second state which is housed in the upward direction from the lower end of the adjustment portion by becoming.

  According to a second problem-solving means of the present invention, in the second state, the operation portion is at least engaged with an engagement portion provided on a surface of the adjustment portion facing the operation portion, and the engagement portion. The engaged portion provided in the operation portion to be engaged is accommodated in the adjusting portion.

  The third problem-solving means of the present invention is a configuration in which the engaging portion and the engaged portion are concavo-convexly fitted.

  According to a fourth problem solving means of the present invention, the operation portion is pivotally supported by the adjustment portion via a pin so as to be rotatable.

  According to a fifth problem solving means of the present invention, the operation portion is formed to be the same as or smaller than an outer shape of a distal end surface of the adjustment portion in the second state.

  In the sewing machine of the present invention, when the operation unit is operated to adjust the sewing speed by suspending the operation unit below the adjustment unit and projecting, the movement amount of the hand holding the cloth, The amount of movement of the viewpoint for staring at the needle tip is small. Furthermore, when the sewing machine is in the second state in which the operation part is stored, for example, when sewing a large object such as a curtain, it is difficult to touch the sewing speed adjusting part even if the object to be sewn passes under the arm part of the sewing machine. Then, it is possible to prevent the sewing speed from being changed against the user's intention due to the cloth touching the sewing speed adjusting portion.

  In the second state, the operation unit includes at least an engagement portion provided on the surface of the adjustment unit facing the operation unit and an engaged portion provided on the operation unit engaged with the engagement unit. By combining and accommodating in the adjustment part, the state which accommodated the operation part in the adjustment part can be hold | maintained without using another member, and operativity can be improved.

  Further, in the second state, the structure of the part can be simplified because the engaging portion and the engaged portion are unevenly fitted.

  In addition, since the operation unit is pivotally supported by the adjustment unit via a pin so that the first state and the second state can be easily deformed, the cloth touches the sewing speed adjustment unit and the user can It is possible to prevent the sewing speed from changing without the adjustment unit moving against the intention.

  In addition, since the operation unit is sized to fit the outer shape of the tip end surface of the adjustment unit in the second state, the sewing speed adjustment unit can be easily assembled to the arm unit of the sewing machine.

It is a front view of the sewing machine concerning the example of the present invention. FIG. 2 is an enlarged perspective view of a state in which an adjustment knob of the slide volume shown in FIG. It is an expansion perspective view of the state which accommodated the adjustment knob of the slide volume shown in FIG. FIG. 3 is an enlarged perspective view of a slider and an adjustment knob shown in FIG. 2.

  FIG. 1 is a front view of a sewing machine 1 according to an embodiment of the present invention. As shown in FIG. 1, the sewing machine 1 has a bed portion 2, a pedestal column portion 3 erected from the right end in FIG. 1 of the bed portion 2, and a bed portion upper surface 2 a from the upper end side of the pedestal column portion 3. And an extending arm portion 4. A start / stop switch 6 for instructing start and stop of the sewing work is provided on the lower left side of the head 5 of the arm portion 4 in FIG. 1, and a needle bar 21 with a sewing needle 22 attached to the head lower surface 5a. The cloth presser 23 protrudes. A cloth presser lever 24 for moving the cloth presser 23 up and down is provided on the back surface of the head 5. Further, a selection mode display LED & selection switch 7, a pattern number selection switch 8, and a 7-segment LED 9 for displaying the spindle rotation speed, pattern number, and the like are provided on the front surface of the arm unit 4. Further, the arm unit front surface 4a (the surface facing the user side of the arm unit 4 when the sewing machine 1 is used) is provided with a slide volume 10 (sewing speed adjusting unit), and the slide volume 10 is a strip-shaped electric resistor (not shown). ), A slider 12 (adjustment unit) that slides on the surface of the electric resistor (moves relative to the arm unit 4), and an adjustment knob 13 (operation) that slides the slider 12 with a finger. Part). The volume part 11 is installed inside the arm part front surface 4a. Moreover, the arm part front surface 4a has the arm part slide hole 4b which is a through hole.

  2 is an enlarged perspective view of a state (first state) in which the adjustment knob 13 of the slide volume 10 shown in FIG. The slider 12 has a substantially rectangular parallelepiped male hinge 12a that is slightly smaller than the slider 12 on the front end surface 12c, and thus has a convex shape when viewed from above. A pin hole through which the pin 14 penetrates below the male hinge 12a. Is open. The diameter of this pin hole is slightly larger than the diameter of the pin 14. The adjustment knob 13 includes a symmetric female-side hinge 13a that forms a substantially U-shaped groove 13b, and a pin hole into which the pin 14 is inserted and fixed is opened in the female-side hinge 13a (upper in FIG. 2). . The diameter of this pin hole is slightly smaller than the diameter of the pin 14. The groove 13b of the adjustment knob 13 is fitted into the male side hinge 12a of the slider 12, and the pin 14 is inserted into the pin hole provided in each of the male side hinge 12a and the female side hinge 13a. Thereby, the adjustment knob 13 is suspended so as to be rotatable only in the vertical direction, and is connected to the male hinge 12a.

  The male hinge 12a of the slider 12 has a concave portion 12b in the longitudinal direction of the outer periphery, and the female hinge 13a of the adjustment knob 13 has a convex portion 13c in the longitudinal direction of the inner periphery of the groove 13b. It is provided so that the part 13c may be fitted.

  FIG. 3 is an enlarged perspective view of a state (second state) in which the adjustment knob 13 of the slide volume 10 shown in FIG. 1 is folded and stored. The adjustment knob 13 is rotated upward about the pin 14, and the adjustment knob 13 is superimposed on the slider 12 and stored. At this time, the adjustment knob 13 is accommodated in the slider 12 with a symmetric concave portion 12b provided on the male hinge 12a and a symmetric convex portion 13c provided on the female hinge 13a fitted in an uneven shape. . The adjustment knob 13 is fixed and does not move when stored in the slider 12. Further, the male hinge 12a is accommodated in the groove 13b of the female hinge 13a. At this time, the adjustment knob 13 is sized so as to be accommodated with respect to the outer shape of the tip end surface 12 c of the slider 12. Further, the slide volume 10 is freely displaceable between a first state in which the adjustment knob 13 protrudes downward from the slider 12 and a second state in which the adjustment knob 13 is superimposed on the slider 12 and stored.

  4 is an enlarged perspective view of the slider 12 and the adjustment knob 13 shown in FIG. 2 to 4, when viewed from the front side of FIG. 1, the outer shape of the adjustment knob 13 is smaller in both the left and right widths and the upper and lower heights than the outer shape of the tip surface 12 c of the slider 12. Further, the male hinge 12a of the slider 12 has a concave portion 12b symmetrically, and the female hinge 13a of the adjustment knob 13 has a convex portion 13c symmetrically, so that the concave portion 12b and the convex portion 13c are fitted. Is provided.

  The operation of the embodiment of the present invention will be described.

  For example, when sewing a large object such as a curtain, the adjustment knob 13 is rotated upward about the pin 14, the concave portion 12 b that the slider 12 has left-right symmetry, and the convex portion 13 c that the adjustment knob 13 has left-right symmetry. And the adjustment knob 13 is housed in the slider 12. Next, the user presses the start / stop switch 6 to start the sewing work. If the sewing speed is different from the assumed sewing speed, the user performs sewing while sliding the adjustment knob 13 leftward or rightward to adjust the sewing speed to an appropriate sewing speed.

  Further, in normal sewing, the concave portion 12b provided symmetrically on the slider 12 and the convex portion 13c provided symmetrically on the adjustment knob 13 are disengaged, and the adjustment knob 13 is hung downward and protruded. State. Next, the user presses the start / stop switch 6 to start the sewing work. If the sewing speed is different from the assumed sewing speed, the user performs sewing while sliding the adjustment knob 13 leftward or rightward to adjust the sewing speed to an appropriate sewing speed.

  Further, when the sewing machine 1 is assembled, when the slide volume 10 is assembled from the inside (not shown) of the arm portion front surface 4a, the adjustment knob 13 of the slide volume 10 is assembled while being folded and stored.

  The effect of the embodiment of the present invention will be described.

  In the sewing machine 1 of the present invention, the adjustment knob 13 is hung downward from the slider 12 so as to protrude, so that when the adjustment knob 13 is operated to adjust the sewing speed, the amount of movement of the hand holding the cloth is reduced. The amount of movement of the viewpoint for staring at the sewing needle 22 can be small. Furthermore, when the adjustment knob 13 is stored, for example, when sewing a large object such as a curtain, it is difficult to touch the slide volume 10 even if the object to be sewn is to pass under the arm portion 4 of the sewing machine 1. Then, the cloth touching the slide volume 10 is prevented from changing the sewing speed against the user's intention.

  Further, by fitting the concave portion 12b of the slider 12 with the convex portion 13c of the adjustment knob 13, the state in which the adjustment knob 13 is housed in the slider 12 can be maintained without using a separate member, improving operability. it can.

  Further, since the adjustment knob 13 is sized to be accommodated in the outer shape of the slider 12 in the housed state, the slide volume 10 can be easily assembled in the arm portion slide hole 4 b of the arm portion 4.

  Further, by projecting the slide volume 10 on the arm portion front surface 4 a, for example, when sewing a large object such as a curtain, the slide volume 10 can be sewn even if it is going to pass under the arm portion 4 of the sewing machine 1. This prevents the cloth from touching the slide volume 10 and changing the sewing speed against the user's intention.

  Further, by making the adjustment knob 13 rotatable, for example, when sewing a large object such as a curtain, it is difficult to touch the slide volume 10 even if an object to be sewn passes under the arm portion 4 of the sewing machine 1. Then, the cloth touching the slide volume 10 is prevented from changing the sewing speed against the user's intention.

  Moreover, since the width of the female hinge 13a is wider than the width of the male hinge 12a, it is easy to pick up when the user operates.

  In addition, this invention is not limited to the said embodiment, You may change into the aspect shown below.

In this embodiment, the male hinge 12a of the slider 12 has a concave portion 12b symmetrically, the female hinge 13a of the adjustment knob 13 has a convex portion 13c symmetrically, and the concave portion 12b and the convex portion 13c are fitted. However, the male hinge 12a of the slider 12 may have a convex portion symmetrically, and the female hinge 13a of the adjustment knob 13 may have a concave portion symmetrically.

In this embodiment, the male hinge 12a of the slider 12 has a concave portion 12b symmetrically, the female hinge 13a of the adjustment knob 13 has a convex portion 13c symmetrically, and the concave portion 12b and the convex portion 13c are fitted. However, it is not left-right symmetric and you may have the recessed part 12b and the convex part 13c only in one side.

In the present embodiment, the male hinge 12a of the slider 12 has the concave portion 12b symmetrically and the female hinge 13a of the adjustment knob 13 has the convex portion 13c symmetrically, but the male hinge of the slider 12a May have a convex portion, and the female hinge 13a of the adjustment knob 13 may have a concave portion.

In the present embodiment, the adjustment knob 13 is folded and housed in the slider 12 with the pin 14 as the rotation center, but the slider 12 and the adjustment knob 13 are provided with concave and convex grooves, and the adjustment knob 13 is moved upward. A structure in which the slider 12 is slid in the direction and stacked on the slider 12 may be used.

1 sewing machine 2 bed part 3 pedestal part 4 arm part 10 slide volume (sewing speed adjusting part)
12 Slider (Adjustment part)
13 Adjustment knob (operation unit)

Claims (5)

The bed section,
A pedestal portion standing from the bed portion;
An arm portion extending opposite to the bed portion from the pedestal portion;
A sewing machine provided with a sewing speed adjusting part for adjusting a sewing speed, provided on the arm part,
The sewing speed adjusting unit is provided so as to protrude from a surface facing the user side of the arm unit when using the sewing machine, and adjusts a sewing speed by moving relative to the arm unit;
An operation unit supported by the adjustment unit and projecting downward from the adjustment unit;
The operation portion has a substantially U-shaped groove formed in the operation portion fitted in a male hinge formed at the tip of the adjustment portion,
The sewing speed adjusting unit is located above the lower end of the adjusting unit by overlapping the first state that is hung downward and projecting from the adjusting unit and the surface of the adjusting unit facing the user side. Sewing machine that is displaceable to the second state stored in the direction .   In the second state, the operation portion includes at least an engagement portion provided on a surface of the adjustment portion facing the operation portion, and an engaged portion provided on the operation portion engaged with the engagement portion. The sewing machine according to claim 1, wherein the sewing machine is engaged with and accommodated in the adjustment unit.   The sewing machine according to claim 2, wherein in the second state, the engaging portion and the engaged portion are concavo-convexly fitted.   The sewing machine according to any one of claims 1 to 3, wherein the operation unit is pivotally supported by the adjustment unit via a pin.   The sewing machine according to any one of claims 1 to 4, wherein the operation unit is formed to be the same as or smaller than an outer shape of a front end surface of the adjustment unit in the second state.

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