1. A camshaft for use in an internal combustion engine, having a rotatably mounted shaft base body and a plurality of cam parts, each having an opening for its reception on the shaft base body, the shaft base body having a longitudinal profile, wherein
at least one cam part is received so as to be rotationally fixed and axially displaceable on the longitudinal profile of the shaft base body,
the at least one axially displaceable cam part forms a positive lock with the shaft base body in a circumferential direction with an internal profile corresponding to the longitudinal profile of the shaft base body,
at least one cam part being axially secured on an outside circumference of the shaft base body, and
the at least one cam part that is to be arranged axially fixed during assembly is pushed along the shaft base body across at least one receiving area for an axially displaceable cam part and then secured.
2. The camshaft according to claim 1, wherein the longitudinal profile of the shaft base body has a conically expanding longitudinal profile.
3. The camshaft according to claim 1, characterized in that the shaft base body has a plurality of receiving areas having a longitudinal profile of identical outside diameter, wherein the at least one axially displaceable cam part is secured to one receiving area and at least one secured cam part is secured to another receiving area by means of an intermediate sleeve, which has radial play to the receiving areas and a larger outside diameter than an inside diameter of the cam part.
4. The camshaft according to claim 1, characterized in that the shaft base body has receiving areas for the at least one secured cam part and for at least one sleeve part provided with a longitudinal profile on its outside diameter.
5. The camshaft according to claim 4, characterized in that the receiving areas are provided on the identical outside diameter.
6. The camshaft according to claim 1, characterized in that the at least one axially displaceable cam part is formed out of two cams axially spaced apart from one another.
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 digital imaging apparatus comprising:
a body comprising;
a display unit configured to output an image signal as an image;
an image processor configured to generate the image signal;
an image encoder configured to generate an encoded signal; and
a communicator configured to transmit data to and receive data from an outside apparatus;
a user input unit comprising an image input unit configured to generate and output an outside image signal that corresponds to an outside image and is not encoded or compressed; and
a data interface configured to receive the outside image signal from the user input unit, and transmit the outside image signal to the image processor and the image encoder,
wherein the display unit is further configured to receive the image signal from the image processor, and
the image encoder is further configured to generate the encoded signal based on the outside image signal, which is received from the data interface, and transmit the encoded signal to the communicator in a predetermined format.
2. The digital imaging apparatus of claim 1, wherein the body further comprises:
a vision processor configured to recognize a user based on the outside image signal that is received through the data interface.
3. The digital imaging apparatus of claim 2, wherein:
the outside image signal is generated at the image input unit to have a constant frame rate regardless of a change of a luminance of surroundings of the user.
4. The digital imaging apparatus of claim 3, wherein the user input unit further comprises:
an infrared light source configured to increase the luminance of the surroundings of the user; and
a light source controller configured to obtain the luminance of the surroundings of the user based on an amount of a change in a resistance of the image input unit, and to turn on the infrared light source when the obtained luminance is below a reference value.
5. The digital imaging apparatus of claim 3, wherein the user input unit further comprises:
an infrared light source configured to increase the luminance of the surroundings of the user; and
a light source controller configured to obtain the luminance of the surroundings of the user by analyzing the outside image that is input through the image input unit, and to turn on the infrared light source in a case when the luminance obtained is below a predetermined reference value.
6. The digital imaging apparatus of claim 3, wherein the user input unit further comprises:
a luminance sensor configured to detect the luminance of the surroundings of the user;
an infrared light source configured to increase the luminance of the surroundings of the user; and
a light source controller configured to obtain the luminance of the surroundings of the user based on an output value of the luminance sensor, and to turn on the infrared light source when the luminance obtained is below a reference value.
7. The digital imaging apparatus of claim 4, wherein:
the light source controller is configured to control an intensity of the infrared light source according to the obtained luminance.
8. A digital imaging apparatus comprising:
a body comprising;
a display unit configured to output an image signal as an image;
a Motion Joint Photographic Experts Group (MJPEG) decoder; and
an image encoder configured to generate an encoded signal;
an image processor configured to generate the image signal; and
a communicator configured to transmit data to and receive data from an outside apparatus;
a user input unit comprising an image input unit configured to generate an outside image signal that corresponds to an outside image, and an MJPEG encoder configured to compress the outside image signal into an MJPEG compressed outside image signal; and
a data interface configured to receive the MJPEG compressed outside image signal, and transmit the MJPEG compressed outside image signal to the MJPEG decoder,
wherein the MJPEG decoder is configured to decode the MJPEG compressed outside image signal received from the data interface into a decoded outside image signal,
the display is further configured to output the image signal based on the decoded outside image signal, and
the image encoder is further configured to generate the encoded signal based on the outside image signal, and transmit the encoded signal to the communicator in a predetermined format.
9. The digital imaging apparatus of claim 8, wherein:
the body further comprises a vision processor configured to recognize a user based on the decoded outside image signal.
10. A method of controlling a digital imaging apparatus, the method comprising:
generating by a user input unit an outside image signal corresponding to an outside image;
transmitting the generated outside image signal to a body of the digital imaging apparatus through a data interface in a form that is not encoded or compressed;
receiving at the body the outside image signal transmitted through the data interface;
recognizing a user based on the outside image signal that is not encoded or compressed;
executing an application of the digital imaging apparatus based on a result of the recognizing;
displaying an image based on the outside image signal that is not encoded or compressed;
compressing the outside image signal into a compressed outside image signal; and
transmitting the compressed outside image signal to an outside apparatus.
11. The method of claim 10, wherein:
the outside image signal generated by the user input unit is provided with a constant frame rate regardless of a change of a luminance of surroundings of the user.
12. The method of claim 11, wherein the user input unit includes an infrared light source configured to enhance the luminance of the surroundings,
wherein the method further comprises:
obtaining the luminance of the surroundings of the user based on an amount of a change in the resistance of the user input unit; and
turning on the infrared light source when the luminance obtained is below a reference value.
13. The method of claim 11, wherein the user input unit includes an infrared light source configured to enhance the luminance of the surroundings, and
wherein the method further comprises:
obtaining the luminance of the surroundings of the user by analyzing the outside image; and
turning on the infrared light source when the obtained luminance is below a predetermined reference value.
14. The method of claim 11, wherein the user input unit includes a luminance sensor configured to detect the luminance of the surroundings of the user and an infrared light source configured to enhance the luminance of the surroundings of the user,
wherein the method further comprises:
obtaining the luminance of the surroundings of the user based on an output value of the luminance sensor; and
turning on the infrared light source when the luminance obtained is below a predetermined reference value.
15. A method of controlling a digital imaging apparatus, the method comprising:
generating by an user input unit an outside image signal corresponding to an outside image;
compressing the outside image signal by using a Motion Joint Photographic Experts Group (MJPEG) encoder into an MJPEG compressed outside image signal;
transmitting the MJPEG compressed outside image signal to a body of the digital imaging apparatus through a data interface;
receiving at the body the MJPEG compressed outside image signal transmitted through the data interface and decoding the MJPEG compressed outside image signal by using an MJPEG decoder into a decoded outside image signal;
recognizing a user based on the decoded outside image signal, and executing an application of the digital imaging apparatus based on a result of the recognizing;
displaying an image based on the decoded outside image signal;
compressing the decoded outside image signal into a compressed outside image signal; and
transmitting the compressed outside image signal to an outside apparatus.
16. The method of claim 15, further comprising:
compressing the decoded outside image signal in a predetermined format and transmitting the outside image signal compressed in the predetermined format to an opposite user.
17. An imaging apparatus comprising:
an image photographing device configured to photograph an outside image and generate an outside image signal corresponding to the outside image;
a data interface configured to receive the outside image signal from the image photographing device and to transmit the outside image signal to the body; and
a body comprising;
a display unit configured to receive the outside image signal from the data interface and output the image signal in the form of an image;
an image encoder configured to receive the outside image signal from the data interface and compress the outside image signal into an encoded signal; and
a communicator configured to transmit the encoded signal to an outside apparatus.