A cover material for a vehicle seat sheet is provided. The cover material for a vehicle seat sheet includes a first fabric, a second fabric, and a decorative piping member. The decorative piping member includes an approximately rectangular seam margin part, a tubular part connected to a widthwise end part of the seam margin part, and a core part arranged in the tubular part in an inserted state. The decorative piping member includes a warp and a weft that both form the tubular part and the seam margin part, and an insertion thread that forms the core part. These are integrally woven with a loom. The seam margin part of the decorative piping member is sandwiched by and between an end part of the first fabric and an end part of the second fabric, and these parts are sewed together in a mutually overlapped state.

A positioning structure for a movable tongue seat includes: an eccentric positioning member disposed between the movable tongue seat and the cutter seat, the eccentric positioning member is provided with a rotary end which is located toward one end of the cutter seat, wherein the eccentric positioning member rotates about the rotary end and is further provided with a drive end which is inserted in a slot of the movable tongue seat, the drive end and the rotary end are not coaxially aligned; and a pivot hole and a pivot provided between the movable tongue seat and the cutter seat, so that the movable tongue seat is able rotate on the cutter seat by rotating about the pivot. When the eccentric positioning member rotates about the rotary end, the drive end can push the movable tongue seat to rotate about the pivot to a desired position.

A waste catch plate for sewing machine held between a sewing machine and a table, and catching wastes produced by a sewing work by the sewing machine, and the waste catch plate includes a plate main body in a tabular shape. The plate main body includes a placement plane provided in a partial region of the plate main body, and on which the sewing machine is to be placed, and an opening provided in a remaining region of the plate main body continuous and adjacent to the partial region, and to which a bag for collecting the wastes is attached. Provided on a back surface of the region of the plate main body where the placement plane is provided is a thin leg spreading on the back surface so as to cover a region surrounded by multiple legs of the sewing machine being placed on the placement plane.

A seam allowance guide aide system including a needle plate of a sewing machine containing vertical and horizontal lines with colors; a vertical line is provided to be aligned with the needle default position on the sewing machine. Colors are used to represent a standard measurement known and accepted in the sewing industry. The seam allowance guide aide is fixed and non-removable to said needle plate.

A seam allowance guide aide system including a needle plate of a sewing machine containing vertical and horizontal lines with colors; a vertical line is provided to be aligned with the needle default position on the sewing machine. Colors are used to represent a standard measurement known and accepted in the sewing industry. The seam allowance guide aide is fixed and non-removable to said needle plate.

A controller of a control device for a sewing machine changes a capture control state of an image sensor between a capture execution state of controlling the image sensor to perform image capturing and a capture non-execution state of controlling the image sensor to not perform image capturing, changes a projection control state of a projector between a projection execution state of controlling the projector to perform projection of a projection image and a projection non-execution state of controlling the projector to not perform projection of the projection image, and in a case where the projection control state is in the projection execution state and the capture control state changes from the capture non-execution state to the capture execution state, changes the projection control state from the projection execution state to the projection non-execution state.

A controller of a control device for a sewing machine changes a capture control state of an image sensor between a capture execution state of controlling the image sensor to perform image capturing and a capture non-execution state of controlling the image sensor to not perform image capturing, changes a projection control state of a projector between a projection execution state of controlling the projector to perform projection of a projection image and a projection non-execution state of controlling the projector to not perform projection of the projection image, and in a case where the projection control state is in the projection execution state and the capture control state changes from the capture non-execution state to the capture execution state, changes the projection control state from the projection execution state to the projection non-execution state.

Apparatuses including support and accessory arms for positioning a sewing machine accessory are disclosed. According to an aspect, an apparatus for positioning a sewing machine accessory includes a support arm. The support arm is configured for attachment to a sewing machine and comprises a first coupling component. The first coupling component comprises a first magnetic component. The apparatus also includes an accessory arm configured for attachment of a sewing machine accessory. The accessory arm comprises a second coupling component. The first coupling component and the second coupling component are configured for attachment together. The second coupling component comprises a second magnetic component that is attracted to the first magnetic component for urging the second coupling component towards the first coupling component when the first and second coupling components are attached together. The first and second coupling components are configured to position the sewing machine accessory to a user-determined position.

Apparatuses including support and accessory arms for positioning a sewing machine accessory are disclosed. According to an aspect, an apparatus for positioning a sewing machine accessory includes a support arm. The support arm is configured for attachment to a sewing machine and comprises a first coupling component. The first coupling component comprises a first magnetic component. The apparatus also includes an accessory arm configured for attachment of a sewing machine accessory. The accessory arm comprises a second coupling component. The first coupling component and the second coupling component are configured for attachment together. The second coupling component comprises a second magnetic component that is attracted to the first magnetic component for urging the second coupling component towards the first coupling component when the first and second coupling components are attached together. The first and second coupling components are configured to position the sewing machine accessory to a user-determined position.

A compressed air supplying device of a sewing machine includes an air pump unit including a piston; a piston driving spring applying biasing force to the piston in an exhaust air direction which is a direction in which the air pump unit exhausts air for driving the piston in the exhaust air direction by the biasing force; a lever making the air pump unit perform intake air movements; and an operating force transmitting mechanism transmitting operating force of the lever to the piston for actuating the piston only in an intake air direction which is a direction in which the air pump unit intakes air against the biasing force of the piston driving spring by the operating force.