Rotation angle detector having sensor cover integrating magnetic sensing element and outside connection terminal

• US 20040135574A1
• Filed: 12/18/2003
• Published: 07/15/2004
• Est. Priority Date: 11/01/1999
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Hagio, Hirofumi, Kondo, Tomokazu, Kono, Yoshiyuki, Kubota, Takamitsu, Hamaoka, Takashi
• Granted Patent: US 6,819,102 B2
• Time in Patent Office: Days
• US Class Current: 324/207.25
• CPC Class Codes: B60K 35/60 Instruments characterised by their location or relative disposition in or on vehicles arrangements of lighting devices on dashboards B60Q3/10
• CPC Class Codes: F02D 11/106 Detection of demand or actuation
• CPC Class Codes: F02D 2200/0404 Throttle position
• CPC Class Codes: F05C 2201/021 Aluminium
• CPC Class Codes: F16K 1/221 specially adapted operating means therefor operating means per se F16K31/00
• CPC Class Codes: F16K 31/041 for rotating valves F16K31/055 takes precedence
• CPC Class Codes: F16K 31/535 for rotating valves F16K31/54 takes precedence
• CPC Class Codes: F16K 37/0033 using a permanent magnet, e.g. in combination with a reed relays
• CPC Class Codes: G01D 11/30 Supports specially adapted for an instrument; Supports specially adapted for a set of instruments
• CPC Class Codes: G01D 2205/40 Position sensors comprising arrangements for concentrating or redirecting magnetic flux
• CPC Class Codes: G01D 5/145 influenced by the relative movement between the Hall device and magnetic fields see G01R33/06

Abstract

Non-contact type Hall ICs detecting an rotation angle of a throttle valve, a stator core strengthening a magnetic field around the Hall ICs, a lead frame connecting the Hall ICs to an outside ECU are integrated in a sensor cover by resin molding. Thus, the Hall ICs, the stator core, and the lead frame are accurately positioned in the sensor cover. As a result, the Hall ICs are accurately positioned with respect to a permanent magnet disposed in a shaft side of the throttle valve, thereby improving an accuracy of detecting the rotation angle of the throttle valve.

Claims

1. A rotation angle detector comprising:

a rotor core rotating with a rotary member of which a rotation angle is detected, said rotor core including a magnet generating a magnetic force;

a non-contact type magnetic sensing element receiving the magnetic force of said magnet to detect the rotation angle of said rotary member;

an output terminal connected to said non-contact type magnetic sensing element to send an output signal of said non-contact type magnetic sensing element to an outside; and

a resin molded member integrating and supporting said non-contact type magnetic sensing element and said output terminal by resin molding.

2. A throttle position sensor comprising:

a housing forming an outer casing, said housing defining an opening;

a throttle valve provided in said housing, said throttle valve including a shaft;

a bearing provided in said housing to rotatably support said shaft;

a rotor core rotating With said shaft, said rotor core including a magnet generating a magnetic force;

a non-contact type magnetic sensing element receiving the magnetic force of said magnet to detect the rotation angle of said shaft;

an output terminal connected to said non-contact type magnetic sensing element to send an output signal of said non-contact type magnetic sensing element to an outside; and

a sensor cover made of resin, said sensor cover integrating and supporting said non-contact type magnetic sensing element and said output terminal by resin molding, said sensor cover covering the opening of said housing.

3. A rotation angle detector comprising:

a rotor core rotating with a rotary member of which a rotation angle is detected, said rotor core including a magnet generating a magnetic force;

a non-contact type magnetic sensing element receiving the magnetic force of said magnet to detect the rotation angle of said rotary member;

a stator core forming a magnetic circuit with said rotor core, said stator core strengthening the magnetic force around said non-contact type magnetic sensing element;

an output terminal connected to said non-contact type magnetic sensing element to send an output signal of said non-contact type magnetic sensing element to an outside;

a first resin molded member integrating and supporting said non-contact type magnetic sensing element and said output terminal by resin molding; and

a second resin molded member integrating and supporting said stator core and said first resin molded member by resin molding.

4. A rotation angle detector according to claim 3, said stator core including:

a first stator core portion made by stacking a plurality of magnetic plates in a thickness direction thereof;

a second stator core portion made by stacking a plurality of magnetic plates in a thickness direction thereof; and

a non-magnetic plate connecting an end surface of said first stator core portion to an-end surface of said second stator core portion, wherein

said first stator core portion and said second stator core portion define a magnetic sensing gap having a predetermined width therebetween.

5. A rotation angle detector comprising:

a rotor core rotating with a rotary member of which a rotation angle is detected, said rotor core including a magnet generating a magnetic force;

two magnetic sensing elements receiving the magnetic force of said magnet to detect the rotation angle of said rotary member; and

output terminals connected to said non-contact type magnetic sensing elements to send output signals of said magnetic sensing elements to an outside, wherein

said magnetic sensing elements are disposed in parallel at 180 degrees interval.

6. A rotation angle detector comprising:

a rotor core rotating with a rotary member of which a rotation angle is detected, said rotor core including a magnet generating a magnetic force;

a plurality of magnetic sensing elements receiving the magnetic force of said magnet to detect the rotation angle of said rotary member; and

output terminals connected to said non-contact type magnetic sensing elements to send output signals of said magnetic sensing elements to an outside, wherein

said magnetic sensing elements are disposed in series in a same direction.

7. A terminal apparatus comprising:

an outside connection terminal connected to an input or output port of an electric device;

a ground terminal connected to a ground port of said electric device;

a condenser connected to both said outside connection terminal and said ground terminal; and

a resin molded member integrating and supporting said electric device, said outside connection terminal, said ground terminal, and said condenser by low pressure resin molding.

8. A terminal apparatus according to claim 7 wherein said resin molded member is made of ultraviolet plastic resin.

9. A terminal apparatus according to claim 7 wherein said condenser is electrically adhered to said outside connection terminal and said ground terminal.

10. A terminal apparatus according to claim 7 wherein said electric device is a non-contact type magnetic sensing element to detect a rotation angle of a rotary member by receiving a magnetic force of a magnet provided in said rotary member.

11. A rotation angle detector comprising:

a rotor core rotating with a rotary member of which a rotation angle is detected, said rotor core including a magnet generating a magnetic force;

a non-contact type magnetic sensing element receiving the magnetic force of said magnet to detect the rotation angle of said rotary member; and

a stator core supporting said non-contact type magnetic sensing element and forming a magnetic circuit with said rotor core, wherein

said stator core includes a first stator core portion made by stacking a plurality of magnetic plates in a thickness direction thereof, a second stator core portion made by stacking a plurality of magnetic plates in a thickness direction thereof, and a non-magnetic plate connecting an end surface of said first stator core portion to an end surface of said second stator core portion, and

said first stator core portion and said second stator core portion define a magnetic sensing gap having a predetermined width therebetween.

12. A rotation angle detector according to claim 11, wherein said stator core further includes a non-magnetic intermediate plate.