1-21. (canceled)
22. A track bushing which is formed such that
by a series of quenching processes in which after the material of a track bushing has been entirely heated to a quenching temperature, preceding cooling from the inner circumferential surface of the track bushing material is effected while carrying out induction heating from the outer circumferential surface of the track bushing material and after an elapse of a specified time, cooling from the outer circumferential surface is carried out, the series of quenching processes further including a step in which during the induction heating from the outer circumferential surface or during the time from when the induction heating is stopped until when the cooling from the outer circumferential surface is finished, the cooling from the inner circumferential surface is stopped to temper the inner circumferential surface within a short time by heat diffusion from the outer circumferential surface to the inner circumferential surface,
quench-hardened cases extending from the outer and inner circumferential surfaces, respectively, to the wall center of the track bushing are formed, with an unhardened quenched layer left between the quench-hardened cases on an inner circumferential surface side and an outer circumferential surface side, such that the quench-hardened case on the outer circumferential surface side is deeper than the quench-hardened case on the inner circumferential surface side, such that the unhardened quenched layer has a structure containing one or more selected from ferrite, pearlite and bainite which precipitate in the course of cooling from the quenching temperature, and such that the quench-hardened case on the inner circumferential surface side has a tempered martensitic structure.
23. The track bushing according to claim 22, wherein the cooling from the inner circumferential surface is stopped during the induction heating from the outer circumferential surface or during the time from when the induction heating is stopped until when the cooling from the outer circumferential surface starts, and after the cooling from the inner circumferential surface has been stopped and the inner circumferential surface has been tempered for a short time by heat diffusion from the outer circumferential surface to the inner circumferential surface, the inner circumferential surface is cooled again.
24. The track bushing according to claim 22 or 23, wherein the surface layers of the flat sealing portions at both end faces are respectively quench-hardened to a depth no less than one-half the wall thickness of the track bushing from the outer circumferential surface.
25. The track bushing according to claim 22, wherein tempering treatment by induction heating is applied to the quench-hardened case on the outer circumferential surface side for a short time so that at least the hardness of the outer circumferential surface is Hv=500 or more.
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 mobile terminal, comprising:
a camera configured to capture images;
a display configured to display a panorama guide including a lattice having at least two rows on a preview screen when a panorama photographing operation using the camera is performed;
a sensor configured to sense a motion of the terminal; and
a controller configured to:
control the display to display a position guide indicating a photographing position of the terminal when performing the panorama photographing operation; and
control the display to display a image guide including an edge region of a previously photographed image in an edge region of the preview screen,
wherein the edge region of the previously photographed image corresponds to a camera angle rotation direction in the previously photographed image, and
wherein the edge region of the preview screen corresponds to a direction opposite to the camera angle rotation direction in the preview screen.
2. The mobile terminal of claim 1, wherein the controller is further configured to mark one section of the lattice of the panorama guide that identifies a first photographed image of the panorama photographing operation.
3. The mobile terminal of claim 2, wherein the sensor is further configured to sense at least one of a horizontally state and forward-and-backward tilting state of the mobile terminal, and the position guide includes a predetermined horizontal guide indicating the sensed horizontally or forward-and-backward tilting state of the mobile terminal.
4. The mobile terminal of claim 3, wherein the controller is further configured to compare a sensed first horizontally state of the terminal in a position for photographing a first image to a sensed second horizontally state of the terminal in a position for photographing a second image, and to provide optical information through the displayed horizontal guide, and
wherein the optical information represents a changing amount of the horizontally of the terminal between the sensed first and second horizontally states.
5. The mobile terminal of claim 3, wherein the controller is further configured to compare a sensed first tilting state of the terminal in a position for photographing a first image to a sensed second tilting state of the terminal in a position for photographing a second image, and to provide optical information through the displayed horizontal guide, and
wherein the optical information represents a changing amount of the tilting of the terminal between the sensed first and second tilting states.
6. The mobile terminal of claim 2, wherein the controller is further configured to perform the panorama photographing in a clockwise or counterclockwise direction from the marked one section of the lattice that identifies the first photographed image of the panorama photographing operation.
7. The mobile terminal of claim 2, further comprising:
an input unit configured to receive, from a user of the terminal, an order of photographing images for performing the panorama photographing operation for constructing a panorama picture.
8. The mobile terminal of claim 1, wherein the controller is further configured to control the display to overlay the panorama guide on the preview screen.
9. The mobile terminal of claim 1, wherein the sensor is further configured to sense an acceleration value of the mobile terminal when the mobile terminal is moved from a position for photographing a first image to a position for photographing a second image included in the panorama photographing operation for photographing a panorama picture, and
wherein the controller is further configured to move a highlight from a first section of the lattice of the panorama guide indicating the first image to a second section of the lattice of the panorama guide in accordance with the sensed acceleration value.
10. The mobile terminal of claim 1, wherein the controller is configured to control the display to display the panorama guide, position guide and image guide simultaneously on the preview screen.
11. A method of controlling a mobile terminal, the method comprising:
displaying a panorama guide including a lattice having at least two rows on a preview screen when a panorama photographing operation using a camera on the terminal is performed;
sensing a motion of the terminal;
displaying a position guide indicating a photographing position of the terminal when performing the panorama photographing operation; and
displaying an image guide including an edge region of a previously photographed image in an edge region of the preview screen,
wherein the edge region of the previously photographed image corresponds to a camera angle rotation direction in the previously photographed image, and
wherein the edge region of the preview screen corresponds to a direction opposite to the camera angle rotation direction in the preview screen.
12. The method of claim 1, wherein the sensing step senses at least one of a horizontally state and forward-and-backward tilting state of the mobile terminal, and the position guide includes a predetermined horizontal guide indicating the sensed horizontally or forward-and-backward tilting state of the mobile terminal.
13. The method of claim 12, further comprising:
comparing a sensed first horizontally state of the terminal in a position for photographing a first image to a sensed second horizontally state of the terminal in a position for photographing a second image; and
providing optical information through the displayed horizontal guide, wherein the optical information represents a changing amount of horizontally of the terminal between the sensed first and second horizontally states.
14. The method of claim 12, further comprising:
comparing a sensed first tilting state of the terminal in a position for photographing a first image to a sensed second tilting state of the terminal in a position for photographing a second image; and
providing optical information through the displayed horizontal guide, wherein the optical information represents a changing amount of tilting of the terminal between the sensed first and second tilting states.
15. The method of claim 11, further comprising:
marking one section of the lattice of the panorama guide that identifies a first photographed image of the panorama photographing operation.
16. The method of claim 15, further comprising:
performing the panorama photographing in a clockwise or counterclockwise direction from the marked one section of the lattice that identifies the first photographed image of the panorama photographing operation.
17. The method of claim 11, wherein the displaying the panorama guide overlays the panorama guide on the preview screen.
18. The method of claim 11, further comprising:
setting, by a user of the terminal, an order of photographing images for performing the panorama photographing operation for constructing a panorama picture.
19. The method of claim 11, further comprising:
sensing an acceleration value of the mobile terminal when the mobile terminal is moved from a position for photographing a first image to a position for photographing a second image included in the panorama photographing operation for photographing a panorama picture; and
moving a highlight from a first section of the lattice of the panorama guide indicating the first image to a second section of the lattice of the panorama guide in accordance with the sensed acceleration value.
20. The method of claim 1, wherein the panorama guide, position guide and image guide are simultaneously displayed on the preview screen.