CN216483147U - Sensor with a sensor element - Google Patents
Sensor with a sensor element Download PDFInfo
- Publication number
- CN216483147U CN216483147U CN201990001239.7U CN201990001239U CN216483147U CN 216483147 U CN216483147 U CN 216483147U CN 201990001239 U CN201990001239 U CN 201990001239U CN 216483147 U CN216483147 U CN 216483147U
- Authority
- CN
- China
- Prior art keywords
- leadframe
- lead frame
- sensor
- contact
- contact foot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000013016 damping Methods 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/245—Housings for sensors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The utility model relates to a sensor (1) comprising at least one sensor element (9) and a signal processing circuit (9), which are arranged as an integrated component (9) jointly or individually on a first lead frame (8) and are connected in an electrically conductive manner to the first lead frame, the sensor element and the signal processing circuit being enclosed by a first plastic housing (3) and the first lead frame (8) being partially embedded in the first plastic housing (3), the first lead frame being connected to a second lead frame or a cable (2), the first lead frame being connected with its first lead frame contacts (6) to first lead frame contacts of the second lead frame or to a first wire harness (2a), the first lead frame being connected with its second lead frame contacts (7) to second lead frame contacts of the second lead frame or to a second wire harness (2b), the two connections are each formed by means of a welding surface, which are each formed by means of ultrasonic welding.
Description
Technical Field
The present invention relates to sensors.
Background
Crimp, solder and weld connections for making sensor contact connections at the terminals of the sensor are known from the prior art.
SUMMERY OF THE UTILITY MODEL
The basic object of the present invention is to provide a sensor that is inexpensive and/or reliable, in particular with regard to its contact or the possibility of contact.
These two connections preferably mean that the connection between the first leadframe contact of the first leadframe and the first leadframe contact of the second leadframe or with the first wire harness is a first connection and the connection between the second leadframe contact of the first leadframe and the second leadframe contact of the second leadframe or with the second wire harness is a second connection.
Preferably, the first leadframe has, in its extension, at least in a first region, two direction changes which together comprise at least 90 °.
The sensor is preferably a speed sensor and/or a rotational speed sensor and/or an angular velocity sensor, in particular a crankshaft rotational speed sensor or a wheel rotational speed sensor or a transmission rotational speed sensor or a turbocharger rotational speed sensor.
Advantageously, the first lead frame is configured to: in relation to at least the first contact leg and the second contact leg of the first leadframe, the first contact leg and the second contact leg each have two direction changes in their extent at least in a first region, which direction changes comprise at least 90 ° in total, at the ends of which the first leadframe contact and the second leadframe contact of the first leadframe are each arranged.
Alternatively, one or both contact feet preferably have a first curvature or first direction change of at least 10 ° or 30 ° to, in particular, 90 °, and then one or both contact feet have a second curvature or second direction change of at least 10 ° or 30 ° to, in particular, 90 °, which is particularly preferably configured to face in a different direction or to have a different orientation than the first direction change. Very particularly preferably, no further contact is formed at the end of the second direction change of the first or contact foot. This second direction change is arranged laterally at the first or second contact foot, for example, substantially in the shape of a flag.
Leadframe contacts are understood to be, for example, contact feet or contact foot ends or corresponding contact regions on contact feet.
The welding surface is preferably also understood to be a welding zone.
The sensor preferably has the following advantages: it avoids the influence and damage to the wire bond and in some cases also to the sealing of the plastic housing, which can occur as a result of the ultrasonic input during ultrasonic welding.
The two welded connections are preferably produced simultaneously at the welding point, whereby the oscillation energy is applied only once by ultrasonic welding. For this purpose, the bonding tool has a common tool head or fork for the two leadframe contacts.
In the prior art, the two side surfaces are welded one after the other.
The utility model further relates to a method for producing a sensor by means of ultrasonic welding.
The sensor element is preferably designed as a GMR sensor element or a TMR sensor element, since it is relatively robust against vibrations. Alternatively, the sensor element is preferably designed as a hall element.
The first leadframe preferably has damping blankets in the region of the leadframe contacts or in the region adjacent to the leadframe contacts, respectively.
The terminal is preferably clamped or secured in the bonding tool by a felt during the ultrasonic bonding process or the manufacturing process. For this purpose, the welding tool has an actuator (gripper) which holds or presses the felt/damping mat against a holding surface.
The damping felt or damping mat is preferably formed from rubber or from an elastic plastic.
During the welding process or the manufacturing method, the sensor housing is expediently held in or received by a tool pocket of the welding tool and is not clamped in particular at the same time.
Preferably, the leadframe has a recess in the region of its first leadframe contact and its second leadframe contact, respectively, into which recess the respective strand of the cable is inserted and/or projects. The recesses are formed in particular such that the first contact leg and the second contact leg are formed wider at these locations and the first lead frame or the respective contact leg is bent upwards before and after the recesses in the lead frame direction from the contact section to the sensor element.
The first lead frame preferably has a hammer-like or flag-like structure, at the end of which, in particular, no contact is formed. The influence of the introduction of ultrasound on the function of the sensor element is preferably reduced by the defined lead frame guidance or formation. In addition, delamination of the lead frame in the plastic housing is limited to a minimum.
The first leadframe preferably comprises one or more bends or direction changes in the direction of the pure entry into the first plastic housing, wherein these bends or direction changes are formed as rounded or angled, in particular meandering, portions.
The first leadframe preferably comprises at least one, in particular two, anchoring openings, in particular on its first and second contact foot, respectively, which are penetrated by the first plastic housing.
The material defined for the surrounding plastic housing is preferably likewise optimized with regard to the introduction of ultrasound waves. The anchoring holes in the end portions serve for positioning the sensor element and additionally for deflecting the propagation of the ultrasonic waves and for stable bonding of the plastic housing at the first lead frame.
In this production method or during the soldering of the wire harness, the wire harness is preferably placed without pressure on the associated leadframe contact. The defined pressure is only established by contact with the ultrasonic tool.
The sensor preferably has a capacitor which is soldered between two leadframe junctions or between the first and second contact feet.
More broadly, to this end, a small piece is bent upwards on each of the left and right sides, thereby forming a recess/recess.
The sensor preferably does not comprise an intermediate lead frame between the cable or plug (the contacts of which are formed by the second lead frame) and the first lead frame.
Preferably, the cable is formed such that the individual wires in the bundle have a diameter of 0.08mm to 0.154 mm. Conveniently, the strands of cable have a cross-section of 0.5mm ^2 or 0.35mm ^2 or 0.25 mm ^2, respectively.
In addition, the utility model relates to the use of the sensor in a motor vehicle.
Drawings
In the schematic diagram:
fig. 1 illustrates an exemplary contact portion of a sensor.
Fig. 2 shows an embodiment of a sensor with an exemplary formed lead frame.
Detailed Description
In the figure the sensor 1 is connected to a cable 2 and its wiring harnesses 2a and 2 b. The sensor 1 has a first plastic housing 3. The first contact foot 4 and the second contact foot 5 are connected with these wire harnesses by means of a first lead frame 6 and a second lead frame 7 by means of ultrasonic bonding surfaces.
The exemplary embodiment of the sensor 1 in fig. 2 shows a first leadframe 8 with a first contact foot 4 and a second contact foot 5. An ASIC 9 including a sensor element and a signal processing circuit is arranged on the first lead frame 8. A protective capacitor 10 is arranged between the two contact pins 4 and 5 and is fixed by means of a soldered connection. The first contact leg and the second contact leg have first direction changing portions 11, 12 and second direction changing portions 13, 14, respectively. Furthermore, the first leadframe comprises at the two contact feet 4, 5 in each case an outwardly arranged flag or hammer element 15 and in each case 2 anchoring holes 16, which are penetrated by the first plastic housing 3, which encloses the first leadframe 8, in addition to the contact regions and the first and second direction changes, the protective capacitor 10 and the ASIC 9.
Claims (9)
1. Sensor comprising at least one sensor element and a signal processing circuit, which are arranged as an integrated circuit jointly or individually on a first lead frame (8) and are electrically conductively connected thereto, wherein the sensor element and the signal processing circuit are enclosed by a first plastic housing (3) and the first lead frame (8) is partially embedded in the first plastic housing (3), wherein the first lead frame is connected to a second lead frame or cable (2),
wherein the first leadframe is connected with its first leadframe contacts (6) to the first leadframe contacts of the second leadframe or to the first wire strands (2a) as first connections,
the first leadframe is connected with its second leadframe contacts (7) to the second leadframe contacts of the second leadframe or to the second wire harness (2b) as a second connection,
wherein the first connection is formed by means of a first soldering surface and the second connection is formed by means of a second soldering surface,
it is characterized in that the preparation method is characterized in that,
the first welding surface and the second welding surface are each formed by means of ultrasonic welding.
2. Sensor according to claim 1, characterised in that the first lead frame (8) has two direction changes (11, 12, 13, 14) in its extension at least in a first area.
3. Sensor according to claim 1 or 2, characterized in that the sensor (1) is a wheel speed sensor or a transmission speed sensor or a turbocharger speed sensor.
4. Sensor according to claim 1 or 2, characterized in that the first lead frame (8) is configured to: at least with regard to the first contact foot (4) and the second contact foot (5) of the first leadframe, the first contact foot (4) and the second contact foot (5) each have two direction changes (11, 12, 13, 14) in their extent at least in a first region, at the ends of which first contact foot (4) and second contact foot (5) the first leadframe contact (6) and the second leadframe contact (7) of the first leadframe are arranged, respectively.
5. Sensor according to claim 4, characterized in that one or both of the first contact foot (4) and the second contact foot (5) have a first curvature or first direction change (11, 12) of 10 ° to 90 ° or 30 ° to 90 °, and then one or both of the first contact foot (4) and the second contact foot (5) have a second curvature or second direction change (13, 14) of 10 ° to 90 ° or 30 ° to 90 °, which is configured to face in a different direction or have a different orientation than the first direction change.
6. A sensor according to claim 1 or 2, characterised in that the first and second weld faces are produced simultaneously, whereby the oscillation energy is applied only once by ultrasonic welding.
7. Sensor according to claim 1 or 2, characterized in that the first lead frame (8) has a damping blanket in the region of or adjacent to the lead frame contacts, respectively, wherein the damping blanket is formed by rubber or by an elastic plastic.
8. Sensor according to claim 1 or 2, characterized in that the leadframe (8) has recesses in the region of its first and second leadframe contacts, respectively, into which recesses the respective strands (2a, 2b) of the cable are embedded and/or protrude.
9. Sensor according to claim 4, characterized in that the first lead frame (8) comprises at least one anchoring hole (16) on its first contact foot (4) and its second contact foot (5), respectively, which is penetrated by the first plastic housing (3).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018222851 | 2018-12-21 | ||
| DE102018222851.5 | 2018-12-21 | ||
| PCT/EP2019/085550 WO2020127197A1 (en) | 2018-12-21 | 2019-12-17 | Connection technology ultrasonic welding in the wheel-speed sensor product line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216483147U true CN216483147U (en) | 2022-05-10 |
Family
ID=69156365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201990001239.7U Active CN216483147U (en) | 2018-12-21 | 2019-12-17 | Sensor with a sensor element |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3899436A1 (en) |
| CN (1) | CN216483147U (en) |
| WO (1) | WO2020127197A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5655826B2 (en) * | 2012-08-24 | 2015-01-21 | 株式会社デンソー | Rotation detecting device and manufacturing method thereof |
| JP5934618B2 (en) * | 2012-09-14 | 2016-06-15 | 矢崎総業株式会社 | Terminal fitting |
| DE102014213588A1 (en) * | 2014-07-11 | 2016-02-18 | Continental Teves Ag & Co. Ohg | Custom sensor manufactured by Triple Molden |
| DE102015224257A1 (en) * | 2015-12-03 | 2017-06-08 | Continental Teves Ag & Co. Ohg | Electrical trace, method and use |
-
2019
- 2019-12-17 CN CN201990001239.7U patent/CN216483147U/en active Active
- 2019-12-17 EP EP19835264.3A patent/EP3899436A1/en active Pending
- 2019-12-17 WO PCT/EP2019/085550 patent/WO2020127197A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020127197A1 (en) | 2020-06-25 |
| EP3899436A1 (en) | 2021-10-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230320 Address after: Hannover Patentee after: Continental Automotive Technology Co.,Ltd. Address before: Frankfurt, Germany Patentee before: CONTINENTAL TEVES AG & Co. OHG |
|
| TR01 | Transfer of patent right |