What is claimed is:
1. A sewing cartridge detachably attached to a sewing apparatus that performs sewing on a workpiece, comprising an engagement recess that is provided at one side of a periphery of the sewing cartridge so that the engagement recess connects to the periphery of the sewing cartridge, and is releasably engaged with an engaging portion provided to the sewing apparatus,
wherein the engagement recess has a connecting portion that allows an opening of the engagement recess to become wider toward the periphery of the sewing cartridge.
2. The sewing cartridge according to claim 1, wherein the engagement recess opens toward the periphery of the sewing cartridge.
3. The sewing cartridge according to claim 2, wherein the engaging portion provided to the sewing apparatus has a shaft portion, and the engagement recess opens in a direction perpendicular to an axial direction of the shaft portion.
4. The sewing cartridge according to claim 3, wherein the engaging portion provided to the sewing apparatus has a head portion that has a large diameter than the shaft portion and is provided to at least one end portion of the shaft portion, wherein the engagement recess includes a narrow recess and a wide recess that are engaged with the shaft portion and the head portion, respectively.
5. The sewing cartridge according to claim 4, wherein the engagement recess opens in directions perpendicular to and along the axial direction of the shaft portion.
6. The sewing cartridge according to claim 3, the connecting portion of the engagement recess extends toward the periphery of the sewing cartridge in the direction perpendicular to the axial direction of the shaft portion.
7. The sewing cartridge according to claim 3, wherein a dimension of the engagement recess is determined so that a clearance can be created between the engagement recess and the shaft portion of the sewing apparatus to rotate the sewing cartridge around the shaft portion of the engaging portion, in a state where the engagement recess of the sewing cartridge is engaged with the shaft portion.
8. The sewing cartridge according to claim 2, wherein the engagement recess opens in a direction with respect to an attaching and detaching direction of the sewing cartridge to the engaging portion provided to the sewing apparatus and in a direction perpendicular to the attaching and detaching direction.
9. The sewing cartridge according to claim 1, further comprising an openable cover and a locking mechanism, the locking mechanism locks the openable cover in a closed position.
10. The sewing cartridge according to claim 1, further comprising a needle cover movable between a cover position and a retracted position.
11. The sewing cartridge according to claim 10, wherein the needle cover serves as a presser foot that holds a work cloth at the time of sewing.
12. The sewing cartridge according to claim 11, further comprising a movement prohibiting mechanism including a movement prohibiting member rotated between a locked position and an unlocked position.
13. The sewing cartridge according to claim 12, wherein the movement prohibiting member maintained in the locked position when the sewing cartridge is not attached to the sewing apparatus, and placed in the unlocked position when the sewing cartridge is attached to the sewing apparatus.
14. The sewing cartridge according to claim 13, wherein the needle cover can be movable if the movement prohibiting member is placed in the unlocked position.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A screen which reflects projection light for display, comprising:
a screen base designed to be wound and including a first surface which reflects the projection light for display, and a second surface disposed on the side opposite to the first surface, the first surface including a display area and an area outside the display area; and
a flexible protection member disposed on the second surface and extending through substantially the full length of the screen base in the winding direction of the screen base,
wherein the flexible protection member is positioned on the second surface such that a clearance is present between at least the display area of the first surface and the second surface when the screen base is wound,
wherein the flexible protection member is only disposed in an area of the second surface of the screen base opposite the area outside the display area, and
wherein the first surface is positioned outside when the screen base is wound.
2. The screen according to claim 1, further comprising a flexible supplementary base designed to be wound and connected to one end of the screen base in the winding direction of the screen base.
3. The screen according to claim 2, wherein
one end of the supplementary base is connected to the one end of the second surface of the screen base; and
the protection member is disposed in the vicinity of the surface of the one end of the supplementary base.
4. A screen unit, comprising:
the screen according to claim 3;
a winding mechanism around which the screen is wound; and
an expanding and contracting mechanism which expands and contracts in cooperation with the winding mechanism to wind and draw out the screen.
5. The screen according to claim 2, wherein
one end of the supplementary base is connected to the one end of the second surface of the screen base; and
the protection member is provided on an area including the junction between the screen base and the supplementary base.
6. A screen unit, comprising:
the screen according to claim 5;
a winding mechanism around which the screen is wound; and
an expanding and contracting mechanism which expands and contracts in cooperation with the winding mechanism to wind and draw out the screen.
7. A screen unit, comprising:
the screen according to claim 2;
a winding mechanism around which the screen is wound; and
an expanding and contracting mechanism which expands and contracts in cooperation with the winding mechanism to wind and draw out the screen.
8. The screen according to claim 1, wherein the protection member is made of elastic material.
9. A screen unit, comprising:
the screen according to claim 1;
a winding mechanism around which the screen is wound; and
an expanding and contracting mechanism which expands and contracts in cooperation with the winding mechanism to wind and draw out the screen.
10. The screen according to claim 1, wherein
a plurality of concaves are disposed in the first surface; and
a reflection film is formed in selected parts on inner surfaces of the concaves.
11. A screen which reflects or transmits projection light for display, comprising:
a screen base designed to be wound and including a first surface which contains a display area that has a reflection film on which the projection light is reflected or a transmission surface through which the projection light is transmitted, and a second surface disposed on the side opposite to the first surface, the first surface including a display area and an area outside the display area; and
a flexible protection member which is disposed on the portion of the second surface corresponding to the outside of the display area in the width direction of the display area, and extends through substantially the full length of the display area in the winding direction of the display area,
wherein the flexible protection member is positioned on the second surface such that a clearance is present between at least the display area of the first surface and the second surface when the screen base is wound,
wherein the flexible protection member is only disposed in an area of the second surface of the screen base opposite the area outside the display area, and
wherein the first surface is positioned outside when the screen base is wound.
12. The screen according to claim 11, further comprising a flexible supplementary base designed to be wound and connected to one end of the screen base in the winding direction of the screen base.
13. The screen according to claim 12, wherein
one end of the supplementary base is connected to the one end of the second surface of the screen base; and
the protection member is disposed in the vicinity of the surface of the one end of the supplementary base.
14. A screen unit, comprising:
the screen according to claim 13;
a winding mechanism around which the screen is wound; and
an expanding and contracting mechanism which expands and contracts in cooperation with the winding mechanism to wind and draw out the screen.
15. The screen according to claim 12, wherein
one end of the supplementary base is connected to the one end of the second surface of the screen base; and
the protection member is provided on an area including the junction between the screen base and the supplementary base.
16. A screen unit, comprising:
the screen according to claim 15;
a winding mechanism around which the screen is wound; and
an expanding and contracting mechanism which expands and contracts in cooperation with the winding mechanism to wind and draw out the screen.
17. A screen unit, comprising:
the screen according to claim 12;
a winding mechanism around which the screen is wound; and
an expanding and contracting mechanism which expands and contracts in cooperation with the winding mechanism to wind and draw out the screen.
18. The screen according to claim 11, wherein the protection member is made of elastic material.
19. A screen unit, comprising:
the screen according to claim 11;
a winding mechanism around which the screen is wound; and
an expanding and contracting mechanism which expands and contracts in cooperation with the winding mechanism to wind and draw out the screen.
20. The screen according to claim 11, wherein
a plurality of concaves are disposed in the first surface; and
a reflection film is formed in selected parts on inner surfaces of the concaves.