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Gas sensor and intermediate component thereof

A technology for gas sensors and intermediate components, applied in the field of gas sensors and intermediate components, capable of solving the problems of deformation of the embedded part P5 and inability to properly perform assembly operations, etc., preventing deformation of the fitting part, suppressing poor fitting, and easy The effect of assembly work

Active Publication Date: 2013-08-28
NGK SPARK PLUG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Therefore, if the outer connection terminal P1 and the inner connection terminal P4 cannot be accurately positioned, when the outer connection terminal P1 and the inner connection terminal P4 are embedded in the sensor element, the outer embedded part P2 of the outer connection terminal P1 and the inner side of the outer connection terminal P1 may occur. Due to problems such as deformation of the embedded part P5 of the connection terminal P4, it may not be possible to perform the assembly work properly.

Method used

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  • Gas sensor and intermediate component thereof
  • Gas sensor and intermediate component thereof
  • Gas sensor and intermediate component thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] In this embodiment, an oxygen sensor for detecting the oxygen concentration in the exhaust gas of an automobile will be described as an example of the gas sensor.

[0052] a) First, based on figure 1 and figure 2 The oxygen sensor of this embodiment will be described. In addition, in figure 1 and figure 2 In , it is shown that the front end side of the oxygen sensor is the lower side and the rear end side is the upper side.

[0053] like figure 1 As shown, the oxygen sensor 1 of this embodiment includes: a cylindrical sensor element 3, which is elongated and closed at the top; a cylindrical ceramic heater 5, which is inserted into the inside of the sensor element 3; The main body metal case 7, which is inserted and fixed by the sensor element 3; the cylindrical metal protector 9, which is installed on the top end side of the main body metal case 7 coaxially with the main body metal case 7; and the cylinder Shaped metal outer cylinder 11 is attached to the rea...

Embodiment 2

[0102] Next, Embodiment 2 will be described, and descriptions of the same contents as those in Embodiment 1 will be omitted.

[0103] Since this embodiment differs from the above-described Embodiment 1 only in the shape of the partition, the partition will be described.

[0104] like Figure 8 As shown in (a) and (b), the separator 121 used in the oxygen sensor of this embodiment is the same as that of the above-mentioned embodiment 1, and is in the shape of a cylinder. 1 with the same shape) through holes 123-129.

[0105] In addition, protrusions (first to fourth protrusions) 131 to 137 are provided at four positions in the circumferential direction at equal intervals between the through holes 123 to 129 .

[0106] In particular, in this embodiment, the protruding parts 131 to 137 are not integral members as in the first embodiment, and the protruding parts 131 to 137 are formed concentrically with the central axis of the partition 121 by overlapping their planar shapes. ...

Embodiment 3

[0111] Next, Embodiment 3 will be described, and descriptions of the same contents as those in Embodiment 1 will be omitted.

[0112] Since this embodiment differs from the above-described Embodiment 1 only in the shape of the partition, the partition will be described.

[0113] like Figure 9 As shown, the separator 151 used in the oxygen sensor of this embodiment has the same cylindrical shape as the above-mentioned embodiment 1, and through holes 153 (same shape as the above-mentioned embodiment 1) are opened at four positions in the axial direction. ~159.

[0114] In addition, between the respective through holes 153 to 159 , protrusions (first to fourth protrusions) 161 to 167 are provided at four positions in the circumferential direction at substantially equal intervals.

[0115] In this embodiment, the outer embedded portion 171 of the outer connection terminal 169 is also fixed to the outer peripheral surface of each protruding portion 161 - 167 by its own elasticit...

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Abstract

The present invention addresses the problem of providing a gas sensor, which can be suitably assembled by accurately aligning connecting terminals with a separator, and an intermediate component of the gas sensor. An oxygen sensor (1) is provided with protruding portions (105-111) that protrude to the leading edge side from the separator (27) surface on the leading edge side. On the outer circumferential surfaces of the protruding portions (105-111), an outer fitting portion (53) of an outer connecting terminal (29) is fixed by means of pressing force of the outer fitting portion itself, and on the inner circumferential surfaces of the protruding portions (105-111), an inner fitting portion (73) of an inner connecting terminal (31) is fixed by means of a pressing force of the inner fitting portion itself. Consequently, the position of the outer connecting terminal (29) and that of the inner connecting terminal (31) with respect to the separator (27) are not easily shifted, and the outer connecting terminal (29) and the inner connecting terminal (31) can be accurately aligned.

Description

technical field [0001] The present invention relates to a gas sensor and an intermediate part thereof. The gas sensor includes: a cylindrical sensor element; a connection terminal fitted to the sensor; and a spacer having a through hole into which a part of the connection terminal is inserted. Background technique [0002] Conventionally, as a sensor having a sensor element for detecting a gas to be detected, for example, an oxygen sensor for detecting the concentration of oxygen contained in exhaust gas of an automobile is known. [0003] As the sensor element of this oxygen sensor, as described in the following patent documents 1 and 2, a sensor formed in a bottomed cylindrical shape, having internal electrodes inside a solid dielectric body and external electrodes outside the solid dielectric body is known. element. [0004] On the rear end side of such a sensor element, an inner connection terminal is arranged. The inner connection terminal is embedded in the sensor ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/409
CPCG01N27/4077G01N33/0009
Inventor 加藤秀和田口政孝
Owner NGK SPARK PLUG CO LTD
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