Patent US1693984A successfully refreshed from Google Patents.
EP0349430A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rotary head drum apparatus
Assignee: Sony Corp
•
Filing: 1989-06-28
•
Granted: —
•
Expires: 2009-06-28
Abstract
Abstract In a rotary head drum apparatus having a magnetic head (10) attached to a rotary drum member (11) and connected to a coil (18a) of a rotor (18) of a rotary transformer (17) so that a signal is transmitted between the magnetic head (10) and a stationary drum member (12) through the rotary transformer (17), a resilient contactor (16) is mounted on one of the rotary drum members (11) and the rotor (18) of the rotary transformer (17), and a contact portion (13) is formed on the other of the rotor (18) and the rotary drum member (11) so as to be contacted by the resilient contactor (16) when the rotary drum (11) and the rotary transformer (17) are assembled with each other. The apparatus further includes an aperture bored through an end face of the stationary drum member (12) and a ground contact pin (31) which is flexible in its radial direction is inserted into the aperture for connecting the stationary drum member (12) to ground. Further, the rotary (11) or stationary (12) drum member is rotatably supported through a support shaft (26) secured in a bore (27) of the stationary (12) or rotary (11) drum member, respectively, and at least one concave or undercut annulus is formed in the inner surface of the bore (27) into which the support shaft (26) is inserted with a press-fit so as to be secured to the inner surface of the bore (27) at its lands or portions above and below the concave or undercut annulus.
Inventors
- 👤 Hideo C/O Sony Corporation Fukushima
- 👤 Masakazu C/O Sony Corporation Kijima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 08:57
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52; G11B5/53
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
177 words
A rotary head drum apparatus in which at least one magnetic head (10) is attached to a rotary drum member (11) for rotation relative to a stationary structure (12), and a rotary transformer (17) is provided for transmitting electrical signals between said magnetic head (10) and said stationary structure (12) and includes a rotor (18) and a stator (19) fixed relative to said rotary drum member (11) and said stationary structure (12), respectively, and having respective coils (18a,19a); characterized in that it comprises means for connecting said magnetic head (10) to the coil of said rotor (18) of the rotary transformer (17) comprising : resilient contactor means (16a,16b) mounted on one of said rotary drum member (11) and said rotor (18); and contact portion means (13a,13b) on the other of said rotary drum member (11) and said rotor (18) for contact with said contactor means (16a,16b) and wherein said contactor means (16a,16b) is urged resiliently against said contact portion means (13a,13b) in response to assembling together of said rotary drum member (11) and said rotary transformer (17).
Claim 2
Dependent Claim
177 words
A rotary head drum apparatus in which at least one magnetic head (10) is attached to a rotary drum member (11) for rotation relative to a stationary structure (12), and a rotary transformer (17) is provided for transmitting electrical signals between said magnetic head (10) and said stationary structure (12) and includes a rotor (18) and a stator (19) fixed relative to said rotary drum member (11) and said stationary structure (12), respectively, and having respective coils (18a,19a); characterized in that it comprises means for connecting said magnetic head (10) to the coil of said rotor (18) of the rotary transformer (17) comprising : resilient contactor means (16a,16b) mounted on one of said rotary drum member (11) and said rotor (18); and contact portion means (13a,13b) on the other of said rotary drum member (11) and said rotor (18) for contact with said contactor means (16a,16b) and wherein said contactor means (16a,16b) is urged resiliently against said contact portion means (13a,13b) in response to assembling together of said rotary drum member (11) and said rotary transformer (17).
Claim 3
Dependent Claim
111 words
The rotary head drum apparatus according to claim 1; characterized in that said contact portion means (13a,13b) have contact surfaces extending in a plane perpendicular to an axis of rotation of said rotary drum member (11), said contactor means (16a,16b) are engageable against said contact surfaces (13a,13b) and are resiliently flexible in directions parallel with said axis of rotation, and said assembling together of said rotary drum member (11) and said rotary transformer (17) is effected by displacement of said rotary drum member (11) in the direction of said axis of rotation relative to said stationary structure (12) for resiliently flexing said contactor means (16a, 16b) against said contact surfaces (13a,13b).
Claim 4
Dependent Claim
35 words
The rotary head drum apparatus according to claim 2; characterized in that said contactor means (16a,16b) includes two contactor elements having portions which are resiliently flexible in said directions parallel with the axis of rotation.
Claim 5
Dependent Claim
34 words
The rotary head drum apparatus according to claim 3; characterized in that said contactor means (16a,16b) further includes terminal portions (21a,21b) for connection by solder to a respective coil (18a) of said rotor (18).
Claim 6
Dependent Claim
23 words
The rotary head drum apparatus according to claim 4; characterized in that said terminal portions (21a,21b) are positioned intermediate said contactor elements (16a,16b).
Claim 7
Dependent Claim
28 words
The rotary head drum apparatus according to claim 5; characterized in that said contactor elements (16a,16b) are substantially L-shaped and have free end portions directed toward each other.
Claim 8
Dependent Claim
117 words
The rotary head drum apparatus according to claim 1; characterized in that said stationary structure (12) includes a stationary drum member coaxial with said rotary drum member (11) and having a central bore (27) extending axially in said stationary drum member (12), a support shaft (26) inserted axially with a press fit in said bore (27), and bearing means (24,25) rotatably mounting said rotary drum member (11) on said support shaft (26) said bore (27) having annular relief means (27A,27B) therein for dividing the surface of said bore (27) into axially spaced lands (27C,27D,27E) so that, as said shaft (26) is inserted axially into said bore (27), said lands (27C,27D,27E) are successively engaged by the shaft surface.
Claim 9
Dependent Claim
98 words
The rotor head drum apparatus according to claim 7; characterized in that said annular relief means includes two axially spaced concave annuli (27A,27B) axially dividing said surface of the bore (27) into two axially spaced, relatively narrow lands (27C,27D) initially engaged by said shaft surface for axially aligning the shaft (26) with the bore (27) as the shaft (26) is inserted in said bore (27) and a relatively wide land (27E) finally engaged by said shaft surface as insertion of the shaft (26) into said bore (27) is completed for securing said shaft (26) in said bore (27).
Claim 10
Dependent Claim
60 words
The rotary head drum apparatus according to claim 7; characterized in that said stationary drum member (12) has an end face with an aperture (61) extending through said end face, and further comprising ground contact means (31) having a body portion which is radially resilient and frictionally engaged in said aperture for connecting said stationary drum member (12) to ground.
Claim 11
Dependent Claim
115 words
The rotary head drum apparatus according to claim 1; characterized in that said stationary structure includes a stationary drum member (12) coaxial with said rotary drum member (11) and carrying a support shaft (26) on which the rotary drum member (11) is mounted so that outer peripheral surfaces of said rotary and stationary drum members form a guide surface for a recording tape to be scanned by said head (10), and said stationary drum (12) has an end face with an aperture (61) therein; and further comprising ground contact means (31) having a body portion which is radially resilient and frictionally engaged in said aperture (61) for connecting said stationary drum member (12) to ground.
Claim 12
Dependent Claim
112 words
A rotary head drum apparatus characterized in that it comprises a rotary drum member (11) having at least one magnetic head (10) mounted thereon, a stationary drum member (12) carrying a support shaft (26) on which siad rotary drum member (11) is rotatable, said rotary and stationary drum members (11,12) having outer peripheral surfaces defining a guide surface for a recording tape to be scanned by said head (10), said stationary drum member (12) having an end face with an aperture (61) therein, and ground contact means having a body portion (31) which is radially resilient and frictionally engaged in said aperture (61) for connecting said stationary drum member (12) to ground.
Claim 13
Dependent Claim
112 words
A rotary head drum apparatus characterized in that it comprises a rotary drum member (11) having at least one magnetic head (10) mounted thereon, a stationary drum member (12) carrying a support shaft (26) on which siad rotary drum member (11) is rotatable, said rotary and stationary drum members (11,12) having outer peripheral surfaces defining a guide surface for a recording tape to be scanned by said head (10), said stationary drum member (12) having an end face with an aperture (61) therein, and ground contact means having a body portion (31) which is radially resilient and frictionally engaged in said aperture (61) for connecting said stationary drum member (12) to ground.
Claim 14
Dependent Claim
28 words
The rotary head drum apparatus according to claim 11; characterized in that said body portion (31) of the ground contact means is cylindrical and has longitudinal slits (31A,31′A).
Claim 15
Dependent Claim
35 words
The rotary head drum apparatus according to claim 11; characterized in that it further comprises a printed circuit board (28) disposed against said end face and in which said ground contact means (31) are implanted.
Claim 16
Dependent Claim
33 words
The rotary head drum apparatus according to claim 11; characterized in that said aperture (61) in said end face of said stationary drum member (12) is spaced radially from said support shaft (26).
Claim 17
Dependent Claim
116 words
A rotary head drum apparatus characterized in that it comprises a rotary drum member (11) carrying at least one magnetic head (10), a stationary drum member (12) coaxial with said rotary drum member (11) and having a central axial bore (27) a support shaft (26) inserted axially with a press fit in said bore (27), and bearing means (24,25) rotatably mounting said rotary drum member (11) on said support shaft (26); said bore (27) having annular relief means (27A,27B) therein for dividing the surface of said bore (27) into axially spaced lands (27C,27D,27E) so that, as said shaft (26) is inserted axially into said bore (27), said lands (27C,27D,27E) are successively engaged by the shaft surface.
Claim 18
Dependent Claim
116 words
A rotary head drum apparatus characterized in that it comprises a rotary drum member (11) carrying at least one magnetic head (10), a stationary drum member (12) coaxial with said rotary drum member (11) and having a central axial bore (27) a support shaft (26) inserted axially with a press fit in said bore (27), and bearing means (24,25) rotatably mounting said rotary drum member (11) on said support shaft (26); said bore (27) having annular relief means (27A,27B) therein for dividing the surface of said bore (27) into axially spaced lands (27C,27D,27E) so that, as said shaft (26) is inserted axially into said bore (27), said lands (27C,27D,27E) are successively engaged by the shaft surface.
Claim 19
Dependent Claim
98 words
The rotary head drum apparatus according to claim 15; characterized in that said annular relief means includes two axially spaced concave annuli (27A,l27B) axially dividing said surface of the bore (27) into two axially spaced, relatively narrow lands (27C,27D) initially engaged by said shaft surface for axially aligning the shaft (26) with the bore (27) as the shaft (26) is inserted in said bore (27) and a relatively wide land (27E) finally engaged by said shaft surface as insertion of the shaft (26) into said bore (27) is completed for securing said shaft (26) in said bore (27).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.