A sensor skeleton and a sensor comprising the sensor skeleton

Abstract

The present invention provides a sensor skeleton and a sensor including the sensor skeleton. The sensor skeleton comprises: a skeleton body; a chip receiving portion provided at the front end of the skeleton body and used to receive a sensor chip, the chip receiving portion having a chip holding structure, the chip holding structure being used to keep the sensor chip inserted into the chip receiving portion fixed; the chip holding structure comprises two L-shaped side walls and a trapezoidal limiting portion, the two L-shaped side walls and the limiting portion define a cavity surrounding the sensor chip, thereby keeping the sensor chip fixed. The sensor skeleton and the sensor of the present invention better solve the technical problems existing in the prior art, such as complex structure, large volume, unstable positioning and low reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of sensors, and in particular relates to a sensor skeleton and a sensor comprising the sensor skeleton. Background Art

[0002] The speed sensor in the vehicle is generally formed by injection molding of the sensor chip and the sensor frame. The sensor frame is not only used to provide support for the sensor chip and electrical connectors, but also provides positioning for subsequent injection molding and processing to prevent deformation and sliding of the sensor chip during the injection molding process.

[0003] With the rapid development of the automobile industry, the types and models of vehicles are constantly increasing. The different installation methods and functional requirements have put forward higher requirements for speed sensors, which can not only flexibly match the actual vehicle environment, but also flexibly meet the needs of different types of wiring harnesses. The existing speed sensor skeleton is generally complex in structure and large in size, resulting in a large overall sensor size and heavy weight, which cannot meet the market demand for lightweight, simple and miniaturized. Summary of the invention

[0004] In order to overcome the deficiencies in the prior art, the present invention provides a sensor frame and a sensor with simple structure, small size, firm positioning and high reliability.

[0005] To achieve the above-mentioned object, the present invention provides a sensor skeleton, comprising: a skeleton body;

[0006] A chip receiving portion provided at the front end of the skeleton body and used for receiving a sensor chip, wherein the chip receiving portion has a chip holding structure, and the chip holding structure is used for holding and fixing the sensor chip inserted into the chip receiving portion;

[0007] The chip holding structure includes two L-shaped side walls and a trapezoidal limiting portion. The two L-shaped side walls and the limiting portion define a cavity surrounding the sensor chip, thereby fixing the sensor chip.

[0008] Preferably, inner wall surfaces of the two L-shaped side walls are respectively provided with tapered long grooves along the insertion direction of the sensor chip, and the tapered shape of the tapered long grooves is adapted to the structure of the inserted sensor chip so as to clamp and fix the sensor chip.

[0009] Preferably, the length of the two L-shaped side walls extending outward from the front end of the skeleton body is greater than the length of the limiting portion extending outward from the front end of the skeleton body, so that the sensor chip can be inserted into the cavity from an end position close to the limiting portion.

[0010] Preferably, the two L-shaped side walls are symmetrical in structure.

[0011] Preferably, the sensor skeleton comprises a first positioning structure and a second positioning structure respectively arranged on both sides of the skeleton body, the first positioning structure and the second positioning structure are both formed by rectangular positioning blocks, and one of the ends of the first positioning structure and the second positioning structure has a positioning notch.

[0012] Preferably, the rectangular positioning blocks of the first positioning structure and the second positioning structure are both provided with waterproof fins.

[0013] Preferably, the sensor skeleton further comprises a group of riveted inserts arranged at the rear end of the skeleton body, one end of the group of riveted inserts is injection molded into the skeleton body and is used to be electrically connected to the pins of the sensor chip.

[0014] Preferably, the sensor skeleton further comprises a third positioning structure provided on the skeleton body, and the third positioning structure is constructed as a stepped block.

[0015] Preferably, the third positioning structure is located between ends of the group of riveted inserts so as to isolate the chip pins and the riveted inserts.

[0016] To achieve the above object, the present invention further provides a sensor, comprising a sensor chip and the above sensor skeleton.

[0017] Compared with the prior art, the sensor frame and sensor of the present invention have a smaller volume and simple structure, which can better meet the requirements of miniaturization and lightweight of future speed sensor products. In addition, through the targeted special structural design, the sensor frame can be accurately and firmly positioned, the chip can be better protected, the residual stress in the traditional integral frame injection molding process can be improved, the flow direction of the injection molding material can be better guided, the impact force in the injection molding process can be balanced, and the quality and reliability of the product can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a top view of a sensor skeleton of a preferred embodiment of the present invention;

[0019] Figure 2 is a right view of the sensor skeleton of a preferred embodiment of the present invention;

[0020] Figure 3 It is a stereoscopic diagram of the sensor skeleton of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0022] In the following description, many specific details are set forth so that those skilled in the art can more fully understand the present invention. However, it is obvious to those skilled in the art that the present invention may be implemented without some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, it is contemplated that the present invention may be implemented with any combination of the following features and elements, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless explicitly stated in the claims. In addition, if words indicating directions appear in this document, such as up, down, left, right, upper side, lower side, front end, rear end, etc., they are only for the convenience of expression and are expressed according to the relative positions of the components in the current drawings, and should not be understood as limiting the scope of protection.

[0023] Figure 1 is a top view of the sensor skeleton of a preferred embodiment of the present invention, Figure 2 This is a right view of the sensor skeleton of a preferred embodiment of the present invention. Figure 3 It is a stereoscopic diagram of the sensor skeleton of a preferred embodiment of the present invention.

[0024] like Figure 1 As shown, the sensor skeleton includes a skeleton body 1, which is arranged at the front end of the skeleton body 1 ( Figure 1 The chip receiving portion 2 is a chip receiving portion 2 (shown at the right end) and is used to receive a sensor chip (not shown in the figure).

[0025] like Figure 3 As shown, the chip receiving portion 2 has a chip holding structure 20, and the chip holding structure 20 is used to hold and fix the sensor chip inserted into the chip receiving portion 2. Figure 2 and Figure 3 The chip holding structure 20 includes two L-shaped side walls 22 and a trapezoidal limiting portion 21. The limiting portion 21 is designed to be trapezoidal to facilitate the guidance and installation of the sensor chip pins. The two L-shaped side walls 22 are preferably symmetrical structures for ease of processing and manufacturing. Of course, in other embodiments, they can also be asymmetrical structures. Figure 2 The two L-shaped side walls 22 shown in the figure are arranged relative to each other at a certain distance, and the limiting portion 21 is located between the two L-shaped side walls 22 and close to the top of the two L-shaped side walls 22. The two L-shaped side walls 22 and the limiting portion 21 jointly define a cavity or receiving space surrounding the sensor chip, thereby fixing the sensor chip. The cavity has a roughly rectangular non-enclosed hollow shape. This hollow inner cavity design is not only simple in structure and lightweight, but also improves the residual stress in the traditional integral frame injection molding process, better guides the flow direction of the injection molding material, and balances the impact force during the injection molding process.

[0026] Furthermore, if Figure 3As shown, the length of the two L-shaped side walls 22 extending outward from the front end of the skeleton body 1 is greater than the length of the limiter 21 extending outward from the front end of the skeleton body 1, so that the sensor chip can be inserted into the cavity from the end position close to the limiter 21. Further, the inner wall surfaces of the two L-shaped side walls 22 are respectively provided with a plurality of grooves extending in the direction of insertion of the sensor chip ( Figure 2 The conical shape of the conical long groove 23 is adapted to the outer contour structure of the inserted sensor chip, that is, the contoured design of the conical long groove 23 facilitates the installation of the sensor chip and the clamping and fixing of the sensor chip. At the same time, it prevents the sensor chip from sliding during the injection molding process, thereby ensuring the installation stability and positioning accuracy of the sensor chip.

[0027] Furthermore, if Figure 1 As shown, the sensor frame also includes two components respectively arranged on both sides of the frame body (such as Figure 1 The first positioning structure 3 and the second positioning structure 4 (on both sides of the upper and lower directions) are both formed by rectangular positioning blocks, and one of the two, such as the end of the second positioning structure 4 in the figure, has a positioning notch 5. The first positioning structure 3 and the second positioning structure 4 of the present invention are similar to a binaural structure. The rectangular positioning blocks of this binaural structure increase the positioning area of ​​the skeleton and the injection mold and reduce the pressure of the skeleton positioning structure during the injection molding process. And the design of the positioning notch 5 prevents the sensor skeleton from being installed incorrectly during the injection molding process, causing losses. Furthermore, the positioning notch 5 is preferably an L-shaped notch, which can satisfy the lateral and longitudinal positioning of the sensor skeleton.

[0028] Furthermore, the rectangular positioning blocks of the first positioning structure 3 and the second positioning structure 4 are both provided with waterproof fins 7, which advantageously solves the problem of water intrusion into the sensor due to injection molding defects.

[0029] Furthermore, the sensor skeleton also includes a sensor disposed at the rear end of the skeleton body 1 ( Figure 1 A group of riveted inserts 8 (the left end shown in the figure), one end of which is injection molded into the skeleton body 1 and is used to electrically connect with the pins of the sensor chip.

[0030] Furthermore, if Figure 3 As shown, the sensor skeleton also includes a third positioning structure 6 provided on the skeleton body 1, and the third positioning structure 6 is constructed as a stepped block. The third positioning structure 6 is located between the ends of the group of riveted inserts 8 to isolate the chip pins and the riveted inserts and limit the position of the pins during the injection molding process.

[0031] Sensor of the present invention can be, for example, a general speed sensor, especially a wheel speed sensor or an ABS sensor of a motor vehicle. Of course, the sensor can also be other sensors, such as, but not limited to, sensors of an engine or a transmission, etc.

[0032] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the contents disclosed in the above embodiments. This application is intended to cover any modification, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary techniques in the art that are not disclosed in the present invention. The description and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

Claims

1. A sensor skeleton, comprising: Skeleton body (1); A chip receiving portion (2) provided at the front end of the skeleton body and used for receiving a sensor chip, the chip receiving portion (2) having a chip holding structure (20) for holding and fixing the sensor chip inserted into the chip receiving portion (2); It is characterized in that The chip holding structure (20) comprises two L-shaped side walls (22) and a trapezoidal limiting portion (21), wherein the two L-shaped side walls (22) and the limiting portion (21) define a cavity surrounding the sensor chip, thereby fixing the sensor chip; The inner wall surfaces of the two L-shaped side walls (22) are respectively provided with tapered long grooves (23) along the insertion direction of the sensor chip, and the tapered shape of the tapered long grooves (23) is adapted to the structure of the inserted sensor chip so as to clamp and fix the sensor chip; The length of the two L-shaped side walls (22) extending outward from the front end of the skeleton body is greater than the length of the limiting portion (21) extending outward from the front end of the skeleton body, so that the sensor chip can be inserted into the cavity from an end position close to the limiting portion, and the two L-shaped side walls (22) are symmetrical in structure.

2. The sensor skeleton according to claim 1, characterized in that The sensor skeleton comprises a first positioning structure (3) and a second positioning structure (4) respectively arranged on both sides of the skeleton body (1); the first positioning structure and the second positioning structure are both formed by rectangular positioning blocks, and one of the ends of the first positioning structure and the second positioning structure has a positioning notch (5).

3. The sensor skeleton according to claim 2, characterized in that: Waterproof fins (7) are provided on the rectangular positioning blocks of the first positioning structure (3) and the second positioning structure (4).

4. The sensor skeleton according to claim 1, characterized in that The sensor skeleton further comprises a group of riveted inserts (8) arranged at the rear end of the skeleton body, one end of the group of riveted inserts being injection-molded into the skeleton body and being used for being electrically connected to the pins of the sensor chip.

5. The sensor skeleton according to claim 4, characterized in that: The sensor skeleton further comprises a third positioning structure (6) provided on the skeleton body, the third positioning structure (6) being constructed as a stepped block.

6. The sensor skeleton according to claim 5, characterized in that: The third positioning structure (6) is located between the ends of the group of riveted inserts so as to isolate the chip pins and the riveted inserts.

7. A sensor, comprising a sensor chip and the sensor skeleton according to any one of claims 1 to 6.

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