JP2018040669A - Sensor device, and sensor element in sensor device and connection method of terminal board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sensor device in which a sensor element having a pair of terminals extending in a longitudinal direction of a holder is fixed to one longitudinal end of the holder that extend in a linear form, and the holder is covered with a resin housing together with the sensor element, and automatic assembly is facilitated.SOLUTION: A holder 11 is provided with a through hole 28 for resistance-welding one end 14f of a pair of terminal boards 14 which are fixed to the holder 11 each corresponding to a pair of terminals 13 and are made from conductive metal, and the terminal 13 of the sensor element 12 in a mutual laminated state, and a coupler portion 15a which the other end 14g of the pair of terminal boards 14 faces is integrally formed with the end on an opposite side to the sensor element 12 of the housing 15 covering the holder 11 together with the sensor element 12 and the pair of terminal boards 14.SELECTED DRAWING: Figure 1

Description

  In the present invention, a sensor element having a pair of terminals extending along the longitudinal direction of the holder is fixed to one end portion in the longitudinal direction of the holder extending linearly, and the holder is covered with the sensor element by a resin housing. The present invention relates to a sensor device, and a method for connecting a sensor element and a terminal plate.

  A sensor device in which a Hall element as a sensor element and a cord electrically connected to the Hall element by welding are fixed to the holder, and the holder is covered with a resin housing together with the Hall element and the cord, It is known from Patent Document 1.

Japanese Patent No. 4138524

  However, in the device disclosed in Patent Document 1, welding of the Hall element and the cord is complicated, and automatic assembly of the sensor device is not easy.

  The present invention has been made in view of such circumstances, and provides a sensor device that facilitates automatic assembly, and a sensor element and a method of connecting a terminal plate that can be securely connected to the sensor element. The purpose is to do.

  In order to achieve the above-described object, the present invention provides a sensor element having a pair of terminals extending along the longitudinal direction of the holder at one end in the longitudinal direction of the holder that extends linearly. In the sensor device in which the holder is covered together with the sensor element, one end of a pair of conductive metal terminal plates fixed to the holder individually corresponding to the pair of terminals, and the terminal of the sensor element A through hole for resistance welding in a stacked state is provided in the holder, the holder is covered with the housing together with the sensor element and the pair of terminal plates, and an end of the housing opposite to the sensor element A first feature is that a coupler portion is formed integrally with the other portion so that the other end portions of the pair of terminal plates face each other.

  According to the present invention, in addition to the configuration of the first feature, the sensor element is fixed to the holder by heat caulking to the terminal of a protrusion integrally protruding from the holder made of resin. The second feature.

  According to the present invention, in addition to the configuration of the first or second feature, the pair of terminal plates is press-fitted into terminal plate press-fitting grooves provided in the holder corresponding to the pair of terminal plates, respectively. Three features.

  Furthermore, the present invention provides a sensor device and terminal plate connection method in the sensor device for electrically connecting the terminal of the sensor element and the terminal plate in the sensor device having any one of the first to third features. The step of fixing the sensor element and the terminal plate to the holder while mutually laminating the terminal of the sensor element and one end of the terminal plate, and the terminal and the terminal plate following the step The fourth feature is that the step of performing the resistance welding is performed.

  According to the first feature of the present invention, since the terminal of the sensor element fixed to the holder and the one end of the terminal plate fixed to the holder are resistance-welded in a stacked state, automatic assembly is possible. It becomes easy.

  Further, according to the second feature of the present invention, the sensor element is fixed to the holder by heat caulking to the terminal of the protrusion integrally formed on the resin holder, so that the sensor element is reliably positioned on the holder. Fixed.

  According to the third feature of the present invention, since the terminal plate is press-fitted into the terminal plate press-fitting groove of the holder, the terminal plate is reliably positioned and fixed to the holder.

  Further, according to the fourth aspect of the present invention, resistance welding of the terminal and the terminal plate is performed in a state where the sensor element and the terminal plate are fixed to the holder while the terminals of the sensor element and one end of the terminal plate are stacked on each other. Therefore, the position shift of the terminal of a sensor element and a terminal board does not arise at the time of resistance welding.

It is a longitudinal cross-sectional view of a sensor apparatus, Comprising: It is sectional drawing which follows the 1-1 line | wire of FIG. It is a perspective view of a sensor apparatus. It is a disassembled perspective view of a sensor apparatus. It is a top view of a holder in the state where a sensor element and a terminal board were assembled. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a top view of a terminal board. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 5.

  The embodiment of the present invention will be described with reference to FIGS. 1 to 8. First, in FIGS. 1 to 3, the sensor device is used as a wheel speed sensor of a vehicle, and extends linearly. A holder 11 made of synthetic resin, a sensor element 12 having a pair of terminals 13 and fixed to one end portion 11a along the longitudinal direction of the holder 11, and the sensor element 12 being fixed to the holder 11 and the sensor element 12 A pair of conductive metal terminal plates 14 connected to the terminals 13 by resistance welding; and a housing 15 made of synthetic resin that covers the holder 11 together with the sensor elements 12 and the pair of terminal plates 14. The plate 14 is formed so as to extend along the longitudinal direction of the holder 11.

  The sensor element 12 is a Hall element, for example, and has a pair of flat terminals 13 extending along the longitudinal direction of the holder 11. Moreover, the sensor element 12 and the capacitor 16 provided between the intermediate portions of the pair of terminals 13 are modularized.

  Referring to FIGS. 4 and 5 together, one side surface of the holder 11 includes, in order from one end portion to the other end portion of the holder 11, a sensor element housing recess 17 for housing the sensor element 12, and a terminal housing. A recess 18, a capacitor housing recess 19, and a pair of terminal plate housing grooves 20 are formed.

  The terminal accommodating recess 18 accommodates a part of the pair of terminals 13 extending from the sensor element 12, and is shallower than the sensor element accommodating recess 17 so that the terminal 13 is in contact with the bottom. The capacitor accommodating recess 19 is formed to be deeper than the terminal accommodating recess 18 so as to accommodate the capacitor 16.

  The pair of terminal plate receiving grooves 20 extends along the longitudinal direction of the holder 11 and has a first receiving groove 20a formed so that a bottom is deeper than the capacitor receiving recess 19 and the first receiving groove 20a. Each of the end portions on the opposite side of the capacitor housing recess 19 is configured to have a second housing groove portion 20b connected through a step.

  In addition, the holder 11 has a pair of side walls 22 that define both sides in the width direction of the sensor element housing recess 17, the terminal housing recess 18, and the capacitor housing recess 19 from the one end 11 a of the holder 11. A partition wall 23 is provided so as to project from the first and second receiving groove portions 20a and 20b of the groove 20 to the position corresponding to the first and second receiving groove portions 20a and 20b. The Further, the rising wall portion 24 defining the end portion of the first receiving groove portion 20a opposite to the capacitor receiving recess portion 19 in the pair of terminal plate receiving grooves 20 rises from the bottom of the first receiving groove portion 20a. It is provided in the holder 11, and this rising wall part 24 becomes a level | step difference between the 1st and 2nd accommodation groove parts 20a and 20b.

  The pair of terminals 13 included in the sensor element 12 are provided with positioning holes 25, respectively, and the sensor element 12 is accommodated in the terminal accommodating recess 18 while being accommodated in the sensor element accommodating recess 17. The positioning holes 25 of the pair of terminals 13 are inserted with a pair of positioning pins 26 protruding from the holder 11 at portions corresponding to the terminal accommodating recesses 18, thereby the sensor element 12 and the pair of terminals. The position along the longitudinal direction of the holder 11 and the position in the width direction of the holder 11 are determined.

  The holder 11 is provided with a protrusion 27 inserted between the pair of terminals 13 at a portion corresponding to the terminal receiving recess 18. The protrusions 27 are heat caulked to the pair of terminals 13, and the sensor element 12 is positioned and fixed to the one end 11 a of the holder 11 by heat caulking of the head 27.

  In a state where the sensor element 12 is fixed to the one end portion 11 a of the holder 11, the ends of the pair of terminals 13 opposite to the sensor element 12 are the first receiving groove portions of the pair of terminal plate receiving grooves 20. The length of the terminal 13 is set so as to protrude toward the 20a side.

  Referring to FIGS. 6 and 7 together, the terminal plate 14 is formed in a strip shape so as to be received in the first receiving groove 20a of the terminal plate receiving groove 20 and extends linearly. A first flat plate portion 14a, a second flat plate portion 14b in which a part is received in the second receiving groove portion 20b of the terminal plate receiving groove 20 and a remaining portion protrudes from the second receiving groove portion 20b, and the holder 11 A rising plate portion 14c extending so as to face the rising wall portion 24; a first bent portion 14d that is bent while being rounded so as to connect the first flat plate portion 14a and the rising plate portion 14c; and the rising plate portion 14c and a second bent portion 14e that is bent while being rounded so as to connect between the second flat plate portion 14b, and the first bent portion 14d is formed on the first flat plate portion 14a. It is formed by narrowing the width of a micro the rising plate part 14c.

  Referring also to FIG. 8, the holder 11 is provided with two pairs of terminal plate press-fit grooves 30 corresponding to the pair of terminal plates 14 respectively. The terminal plate press-fitting grooves 30 are press-fitted on both sides in the width direction of the rising plate portion 14 c of the terminal plate 14. On the inner side surfaces of the side wall 22 and the partition wall 23 in the holder 11, protrusions 31 that respectively form the terminal plate press-fitting grooves 30 between the rising wall portions 24 are integrally projected. Between the protrusions 31, there are passages 32 that allow a part of the first bent portion 14 d of the terminal plate 14 to move when both sides in the width direction of the rising plate portion 14 c are press-fitted into the terminal plate press-fitting groove 30. It is formed.

  A concave portion 33 corresponding to the passage 32 is formed in the central portion in the width direction of the rising wall portion 24 of the holder 11 so as to extend along the longitudinal direction of the rising wall portion 24. The rising wall portion 24 is provided with first protrusions 34 protruding toward the protrusion 31, and both sides of the rising plate portion 14 c in the width direction are the first protrusions. 34 is pressed into the terminal plate press-fitting groove 30 so as to be cut.

  Further, on the side surface of the rising portion 14c of the terminal plate 14, a second protrusion 35 is provided to extend over the entire length in the plate thickness direction, and both sides in the width direction of the rising plate portion 14c are The bottom of the terminal plate press-fitting groove 30 is pressed into the terminal plate press-fitting groove 30 while the second protrusion 35 is scraped off.

  In the terminal plate 14 press-fitted and fixed to the holder 11, the end of the first flat plate portion 14a housed in the first housing groove 20a on the sensor element 12 side, that is, one end portion 14f of the terminal plate 14 is stored. Is arranged so as to overlap the end of the sensor element 12 on the side opposite to the sensor element 12, so that the terminal accommodating recess 18 and the terminal plate accommodating groove The level | step difference between 20 1st accommodating groove parts 20a is set. Further, in the terminal plate 14 in a state of being press-fitted and fixed to the holder 11, the end of the second flat plate portion 14b accommodated in the second accommodation groove portion 20b opposite to the sensor element 12, that is, the terminal plate 14. The other end portion 14 g of the holder 11 is disposed so as to protrude from the other end portion 11 b of the holder 11.

  By the way, one end portion 14f of the terminal plate 14 is resistance-welded in a laminated state to the terminal 13 of the sensor element 12, and the terminal 13 and the terminal plate are used to perform the resistance welding. The holder 11 is provided with a pair of through-holes 28 at a portion corresponding to the laminated portion of the one end portion 14 f of 14, that is, a portion corresponding to between the capacitor receiving recess 19 and the pair of terminal plate receiving grooves 20.

  In addition, when electrically connecting the terminal 13 of the sensor element 12 and the pair of terminal plates 14 when the sensor device is assembled, the terminal 13 of the sensor element 12 and one end portion 14f of the terminal plate 14 are mutually connected. A step of fixing the sensor element 12 and the terminal plate 14 to the holder 11 while being laminated, and a step of executing resistance welding of the terminal 13 and the terminal plate 14 subsequent to the step.

  The sensor element 12 and the terminal plate 14 are fixed to the holder 11 and the terminal 13 and the terminal plate 14 of the sensor element 12 are electrically connected to each other. The holder 11 together with the terminal plate 14 is positioned and inserted into a mold apparatus (not shown), and the housing 15 is formed by pouring molten synthetic resin into the mold apparatus. The sensor element 12 and the pair of terminals The holder 11 is covered with the housing 15 together with the plate 14.

  At the end of the housing 15 opposite to the sensor element 12, a coupler portion 15 a is formed integrally with the other end 14 g of the pair of terminal plates 14. Also, the housing 15 is integrally provided with a bracket 15b that projects outward, and is made of a metal that is formed in a ring shape so that a bolt for fastening the housing 15 is inserted into a support (not shown). The collar 29 is embedded in the bracket 15b.

  Next, the operation of this embodiment will be described. A pair of conductive metal terminal plates 14 individually corresponding to the pair of terminals 13 of the sensor element 12 are fixed to the synthetic resin holder 11, and the terminal plate 14. A through hole 28 for resistance welding the one end portion 14f of the terminal 13 and the terminal 13 in a laminated state is provided in the holder 11, and the holder 11 together with the sensor element 12 and the pair of terminal plates 14 is made of resin. A coupler portion 15a is integrally formed at the end of the housing 15 opposite to the sensor element 12 so that the other end portion 14g of the pair of terminal plates 14 faces. Assembling becomes easy.

  Further, since the protrusion 27 is integrally provided on the holder 11 and the sensor element 12 is fixed to the holder 11 by heat caulking of the protrusion 27 to the terminal 13, the sensor element 12 is securely attached to the holder 11. Is fixed to the position.

  Further, since the pair of terminal plates 14 is press-fitted into the two pairs of terminal plate press-fitting grooves 30 provided in the holder 11 corresponding to the pair of terminal plates 14 respectively, the terminal plate 14 is securely inserted into the holder 11. Positioning is fixed.

  Furthermore, in electrically connecting the terminal 13 and the terminal plate 14 of the sensor element 12, the sensor element 12 and the terminal plate 14 of the sensor element 12 are laminated while mutually laminating one end of the sensor element 12 and the terminal plate 14. Since the step of fixing the terminal plate 14 to the holder 11 and the step of executing resistance welding of the terminal 13 and the terminal plate 14 subsequent to the step are performed, the terminal 13 of the sensor element 12 and The terminal board 14 is not misaligned.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

DESCRIPTION OF SYMBOLS 11 ... Holder 11a ... One end part 12 ... Sensor element 13 ... Terminal 14 ... Terminal board 14f ... One end part 14g of a terminal board ... Other end part 15 of a terminal board ... Housing 15a ... Coupler part 27 ... Protrusion 28 ... Through hole 30 ... Terminal plate press-fitting groove

Claims (4)

  A sensor element (12) having a pair of terminals (13) extending along the longitudinal direction of the holder (11) is fixed to one end (11a) in the longitudinal direction of the holder (11) extending linearly, and is made of resin. In the sensor device in which the holder (11) is covered together with the sensor element (12) in the housing (15), a pair of conductive members fixed to the holder (11) individually corresponding to the pair of terminals (13). A through hole (28) for resistance welding the one end portion (14f) of the metal terminal plate (14) and the terminal (13) of the sensor element (12) in a laminated state is the holder (11 The holder (11) is covered with the housing (15) together with the sensor element (12) and the pair of terminal plates (14), and the sensor element (12) of the housing (15) is covered. Sensor device, characterized in that the opposite end, the coupler portion for exposing the other end portion (14 g) of the pair of terminal plates (14) (15a) is formed integrally with.   The sensor element (12) is fixed to the holder (11) by heat caulking to the terminal (13) of a protrusion (27) integrally protruding from the holder (11) made of resin. The sensor device according to claim 1.   The pair of terminal plates (14) are press-fitted into terminal plate press-fitting grooves (30) provided in the holder (11) corresponding to the pair of terminal plates (14), respectively. Or the sensor apparatus of 2.   The sensor element (12) in the sensor device according to any one of claims 1 to 3, wherein the terminal (13) of the sensor element (12) and the terminal plate (14) are electrically connected. ) And the terminal plate (14), the sensor element (12) while laminating the terminal (13) of the sensor element (12) and one end (14f) of the terminal plate (14). And the step of fixing the terminal plate (14) to the holder (11), and the step of performing resistance welding of the terminal (13) and the terminal plate (14) following the step. A method for connecting a sensor element and a terminal board in a sensor device.

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