# US 5,699,600 A · Apparatus for automatically press-fitting a turntable > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,699,600 A - Document ID: US5699600A - Status: Granted - Kind: A - Application number: 08/655,779 - Filed: 1996-05-30 - Granted: 1997-12-23 - Earliest claimed: 1995-05-31 - Assignees: Daewoo Electronics Co., Ltd. - Inventors: Young-Suk Choi - Web page: https://patentgrep.com/patent/US5699600A ## CPC - G11B 17/028: of discs rotating during transducing operation - Y10T 29/53826: Arbor-type press means - Y10T 29/5383: having fluid operator - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An apparatus for automatically press-fitting a turntable has a turntable driving motor which is attachably/detachably installed to/from a driving motor fixing part for inserting a rotating shaft of the driving motor into a turntable assembly with significantly high precision to minimize eccentric error. Here, a first press-fitting part pressively fixes the driving motor to the driving motor fixing part, and a second press-fitting part descends the driving motor fixing part press-fitted with the driving motor in a motor shaft direction. The center of a turntable assembly fixing part is arranged at an extending line of driving motor shaft to allow a rotating shaft of the turntable assembly to be exactly coaxial with the driving motor. ## Claims ### Claim 1 An apparatus for automatically press-fitting a turntable comprising: a driving motor fixing part for being installed with an attachable driving motor; a first press-fitting part for pressively-fixing said driving motor into said driving motor fixing part; a second press-fitting part for moving said driving motor fixing part press-fitted with said driving motor in the direction of a motor shaft; and a turntable assembly fixing part for being installed with an attachable turntable assembly, the turntable assembly fixing part having a central axis arranged at an extending line of a shaft of the driving motor to permit a rotating shaft of said turntable assembly to be exactly coaxial with said driving motor when said turntable assembly is installed at the turntable assembly fixing part, said turntable assembly fixing part having an annular projection formed coaxially with and on an upper portion of the turntable assembly fixing part, said annular projection being inserted into a groove of round shape formed on a supporting shaft member of said turntable assembly, a guiding slot for being penetrated up and down along the central axis of the turntable assembly fixing part, a space formed under the guiding slot having a diameter greater than that of the guiding slot, and a guide pin installed in the guiding slot and the space of the turntable assembly fixing part, the guide pin being formed to have a lower end installed to be in contact with an elastic spring and an upper end penetrating through the guiding slot and protruding over the annular projection, and the guiding slot for allowing a central axis of the guide pin to be exactly coaxial with the motor shaft of the driving motor. ### Claim 2 (depends on 1) The apparatus for automatically press-fitting a turntable as claimed in claim 1, further comprising guide members installed to be parallel with a direction of the motor shaft for precisely guiding said second press-fitting part in the direction of the motor shaft, whereby said second press-fitting part precisely moves said driving motor fixing part in the direction of the motor shaft. ### Claim 3 (depends on 1) The apparatus for automatically press-fitting a turntable as claimed in claim 1, wherein said turntable assembly fixing part is installed with a limit switch on a predetermined position of an upper portion thereof for controlling the movement of said driving motor fixing part when said driving motor fixing part is moved toward said turntable assembly. ### Claim 4 (depends on 1) The apparatus for automatically press-fitting a turntable as claimed in claim 1, wherein said guide pin has a section as an inverted-T shape having a head portion arranged to said space in the lower portion of said guiding slot, and a diameter of said head portion is formed to be greater than said diameter of said guiding slot for preventing deviation thereof from said guiding slot. ### Claim 5 (depends on 1) The apparatus for automatically press-fitting a turntable as claimed in claim 1, wherein said driving motor fixing part has a side opened for receiving said driving motor therethrough, an elongated guide hole in a bottom plane thereof for permitting said driving motor shaft to pass through said bottom plane, and an abutment at an upper portion of said elongated guide hole in said bottom plane for permitting said driving motor fixing part to precisely hold said motor shaft of said driving motor. ### Claim 6 An apparatus for automatically press-fitting a turntable comprising: a driving motor fixing part for being installed with an attachable driving motor, said driving motor fixing part being installed with a photosensitive switch at a predetermined position of an internal space in which the driving motor is to be disposed for sensing the mounting of said driving motor into said driving motor fixing part to thereby drive a first a first press-fitting part for pressively-fixing said driving motor into said driving motor fixing part, a second press-fitting part for moving said driving motor fixing part press-fitted with said driving motor in the direction of a motor shaft; and a turntable assembly fixing part for being installed with an attachable turntable assembly, the turntable assembly fixing part having a central axis arranged at an extending line of a shaft of the driving motor to permit a rotating shaft of the turntable assembly to be exactly coaxial with the driving motor when the turntable assembly is installed at the turntable assembly fixing part. ### Claim 7 (depends on 6) The apparatus for automatically press-fitting a turntable as claimed in claim 6, further comparing guide members installed to be parallel with a direction of motor shaft for precisely guiding said second press-fitting part in the direction of the motor shaft. ### Claim 8 (depends on 6) The apparatus for automatically press-fitting a turntable as claimed in claim 6, wherein said turntable assembly fixing part is installed with a limit switch on a predetermined position of an upper portion thereof for controlling the movement of said driving motor fixing part when said driving motor fixing part is moved toward the turntable assembly. ### Claim 9 (depends on 6) The apparatus for automatically press-fitting a turntable as claimed in claim 6, wherein the turntable assembly fixing part has an annular projection formed coaxially with and on an upper portion of the turntable assembly fixing part, said annular projection being inserted into a groove of round shape formed on a supporting shaft member of said turntable assembly, a guiding slot for being penetrated up and down along the central axis of the turntable assembly fixing part, a space formed under the guiding slot having a diameter greater than that of the guiding slot, and a guide pin installed in the guiding slot and the space of the turntable assembly fixing part, the guide pin being formed to have a lower end installed to be in contact with an elastic spring and an upper end penetrating through the guiding slot and protruding over the annular projection, and the guiding slot for allowing a central axis of the guide pin to be exactly coaxial with the motor shaft of the driving motor. ### Claim 10 (depends on 9) The apparatus for automatically press-fitting turntable as claimed in claim 9, wherein the guide pin has a section as an inverted-T shape having a head portion arranged to said space in the lower portion of the guiding slot, and a diameter of the head portion is formed to be greater than the diameter of the guiding slot for preventing deviation thereof from the guiding slot. ### Claim 11 (depends on 6) The apparatus for automatically press-fitting a turntable as claimed in claim 6, wherein said driving motor fixing part has a side opened for receiving the driving motor therethrough, an elongated guide hole in a bottom plane thereof for permitting the shaft of driving motor to pass through the bottom plane, and an abutment at an upper portion of the elongated guide hole in the bottom plane for permitting said driving motor fixing part to precisely hold the shaft of driving motor. ### Claim 12 An apparatus for automatically press-fitting a turntable comprising: a driving motor fixing part for being installed with an attachable driving motor; a first press-fitting part for pressively-fixing said driving motor into said driving motor fixing part; a second press-fitting part for moving said driving motor fixing part press-fitted with said driving motor in the direction of a motor shaft; a turntable assembly fixing part for being installed with an attachable turntable assembly, the turntable assembly fixing part having a central axis arranged at an extending line of a shaft of the driving motor to permit a rotating shaft of the turntable assembly to be exactly coaxial with the driving motor when the turntable assembly is installed at the turntable assembly fixing part; and a photosensitive sensor for sensing an inclined range of said driving motor mounted to said driving motor fixing part, an A/D converter for converting an analog signal with respect to the inclination sensed in said photosensitive sensor into a digital signal, a microprocessor for comparing the inclination value displayed as said digital signal supplied from said A/D converter with a preset allowable inclination value, and a digital display board for externally displaying the numerical value determined in said microprocessor, so that said driving motor is more precisely mounted into said driving motor fixing part. ### Claim 13 (depends on 12) The apparatus for automatically press-fitting a turntable as claimed in claim 12, further comprising guide members installed to be parallel with a direction of motor shaft for precisely guiding said second press-fitting part in the direction of the motor shaft, whereby said second press-fitting part precisely moves the driving motor fixing part in the direction of the motor shaft. ### Claim 14 (depends on 12) The apparatus for automatically press-fitting a turntable as claimed in claim 12, wherein said turntable assembly fixing part is installed with a limit switch on a predetermined position of an upper portion thereof for controlling the movement of said driving motor fixing part when said driving motor fixing part is moved toward the turntable assembly. ### Claim 15 (depends on 12) The apparatus for automatically press-fitting a turntable as claimed in claim 12, wherein the turntable assembly fixing part has an annular projection formed coaxially with and on an upper portion of the turntable assembly fixing part, said annular projection being inserted into a groove of round shape formed on a supporting shaft member of said turntable assembly, a guiding slot for being penetrated up and down along the central axis of the turntable assembly fixing part, a space formed under the guiding slot having a diameter greater than that of the guiding slot, and a guide pin installed in the guiding slot and the space of the turntable assembly fixing part, the guide pin being formed to have a lower end installed to be in contact with an elastic spring and an upper end penetrating through the guiding slot and protruding over the annular projection, and the guiding slot for allowing a central axis of the guide pin to be exactly coaxial with the motor shaft of the driving motor. ### Claim 16 (depends on 15) The apparatus for automatically press-fitting a turntable as claimed in claim 15, wherein the guide pin has a section as a inverted-T shape having a head portion arranged to said space in the lower portion of the guiding slot, and a diameter of the head portion is formed to be greater than the diameter of the guiding slot for preventing deviation thereof from the guiding slot.