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

• US 6,819,102 B2
• Filed: 12/18/2003
• Issued: 11/16/2004
• Est. Priority Date: 11/01/1999
• Status: Expired due to Term

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Kono, Yoshiyuki, Kubota, Takamitsu, Hamaoka, Takashi, Hagio, Hirofumi, Kondo, Tomokazu
• Primary Examiner(s): LeDynh, Bot
• Application Number:
  US10/737,752
• Publication Number:
  US 20040135574A1
• Time in Patent Office: 334 Days
• Field of Search: 324/207.13, 324/207.2, 324/207.21, 324/207.25, 73D/IG.3, 731/182, 123/612, 123/617
• 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; 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, a second stator core portion and a non-magnetic plate, wherein said non-magnetic plate connects 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.

2. The rotation angle detector according to claim 1, wherein:

said first stator core portion includes a plurality of magnetic plates, which are stacked over one another; and

said second stator core portion includes a plurality of magnetic plates, which are stacked over one another.

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

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

said stator core further includes a non-magnetic intermediate plate, which is interposed between said non-magnetic plate and said first and second stator core portions.

4. 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, a second stator core portion and a non-magnetic plate, wherein said non-magnetic plate connects 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; and

further comprising;

an outside connection terminal connected to an input or output port of said non-contact type magnetic sensing element;

a ground terminal connected to a ground port of said non-contact type magnetic sensing element;

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.

5. The rotation angle detector according to claim 4, wherein said resin molded member is made of ultraviolet plastic resin.

6. The rotation angle detector according to claim 4, wherein said condenser is electrically connected to said outside connection terminal and said ground terminal by adhesive.