A fixing device and a chip test probe card

Abstract

The present invention discloses a fixing device, including a base, the base includes an elastic cylinder, the cylinder forms a storage space for accommodating an object, a limiter is provided on the outer side of the cylinder, the limiter is arranged around the outer periphery of the cylinder and has a gap with the cylinder, a plurality of elastic members are provided in the gap, and the plurality of elastic members are evenly distributed along the circumference of the cylinder. When an object is placed in the storage space, the cylinder is squeezed by the object and expands outwards. At this time, the cylinder pushes the elastic member outwards, and at the same time, the elastic member is blocked by the limiter and pushes the cylinder inwards. The cylinder is applied with a uniform inward force by the plurality of elastic members, so that the position displacement of the object is avoided, and the stable fixation of the object is achieved. Moreover, when the object needs to be installed or removed, the object can be placed in the storage space or pulled out, and the installation and removal of the object are simple and quick. In addition, the cylinder is elastic and can be applied to objects with a certain size deviation. In addition, the present invention also discloses a chip test probe card.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and in particular to a fixing device and a chip testing probe card having the fixing device. Background Art

[0002] In the industrial field, in order to ensure the smooth progress of operations, the problem of fixing objects is often involved. Especially in the chip testing line of magnetic sensors, the magnetic field generator needs to be stably fixed on the probe card to ensure that the central axis of the coil of the magnetic field generator is always perpendicular to the center of the magnetic sensor chip, so as to ensure that the magnetic field generator can generate a constant magnetic flux to meet the requirements of uniform magnetic field during chip testing, thereby ensuring the precision and accuracy of chip testing.

[0003] At present, the magnetic field generator is mainly fixed on the probe card by setting a fixture on the probe card. However, due to production and debugging requirements, it is often necessary to disassemble and reinstall the magnetic field generator on the probe card for transfer, inspection and adjustment, etc. This requires that the fixture can not only achieve stable fixation of the magnetic field generator installed therein to ensure that the magnetic field generator does not shift in position, but also achieve rapid loading / unloading of the magnetic field generator. The existing fixture cannot achieve rapid loading / unloading of the magnetic field generator according to the needs of use, and the stability and accuracy of the fixture are low, and it is impossible to ensure stable fixation of the magnetic field generator. Summary of the invention

[0004] The object of the present invention is to provide a fixing device which can not only stably fix an object installed therein, but also realize rapid installation and removal of the object.

[0005] Another object of the present invention is to provide a chip test probe card, the fixing device of which can achieve both stable fixing of the magnetic field generator and rapid installation and removal of the magnetic field generator.

[0006] In order to achieve the above-mentioned purpose, the present invention discloses a fixing device, including a base, the base including an elastic cylinder, the cylinder forming a accommodating space for accommodating an object to be fixed, a limiting member is provided on the outer side of the cylinder, the limiting member is arranged around the outer circumference of the cylinder and has a gap with the cylinder, a plurality of elastic members are provided in the gap, and the plurality of elastic members are evenly distributed along the circumference of the cylinder. When an object is placed in the accommodating space, the cylinder is squeezed by the object to expand outward and push the elastic member outward, and at the same time, the elastic member is blocked by the limiting member and pushes the cylinder inward in the opposite direction.

[0007] Compared with the prior art, the fixing device of the present invention is provided with a cylinder and a limiter, and a plurality of elastic members evenly distributed along the circumference of the cylinder are provided in the gap between the cylinder and the limiter. When an object is placed in the accommodating space, the cylinder is squeezed by the object and expands outwards. At this time, the cylinder will push the elastic member outwards, and the elastic member will be blocked by the limiter. At this time, the elastic member will push the cylinder inwards in the opposite direction. By using the evenly distributed multiple elastic members, a uniform inward force is applied to the cylinder respectively, so as to avoid the position displacement of the object and realize the stable fixation of the object. Moreover, when it is necessary to use the fixing device to fix the object, it is only necessary to put the object into the accommodating space. When it is necessary to remove the object from the fixing device, it is only necessary to pull out the object. The installation and removal of the object are simple and quick, and less time is needed. In addition, since the cylinder is elastic, the fixing device can be applied to objects with a certain size deviation.

[0008] Preferably, the force of the elastic member pressing the cylinder inwards is perpendicular to the outer wall of the cylinder.

[0009] Preferably, the limiting member is a cylindrical limiting member arranged around the outer circumference of the cylinder.

[0010] Preferably, the outer wall contour of the cylinder and the inner wall contour of the limiting member are both cylindrical, the elastic member is arc-shaped, and the opening of the elastic member faces the limiting member.

[0011] More preferably, the arc apex of the elastic member fits with the outer wall of the cylinder, and the two end points of the elastic member fit with the inner wall of the limiting member.

[0012] Specifically, the elastic member is made of PVC material.

[0013] Preferably, the fixing device further comprises a cover body, wherein the cover body is detachably connected to the base, and when the cover body covers the base, the cover body can exert a force on the object positioned on the base toward the base.

[0014] More preferably, the base is provided with a plurality of plug-in holes, and the cover body is provided with a plurality of plug-in posts for plugging and cooperating with the plug-in holes. The plug-in posts can be inserted into the plug-in holes to cover the cover body on the base or pulled out from the plug-in holes to remove the cover body from the base.

[0015] In order to achieve the above-mentioned purpose, the present invention discloses a chip test probe card, comprising a PCB board and a fixing device arranged on the PCB board, the fixing device comprising a PCB board and a fixing device arranged on the PCB board, the fixing device comprising a base, the base comprising an elastic cylinder, the cylinder forming an accommodating space for accommodating a magnetic field generator, a limiting member is arranged on the outer side of the cylinder, the limiting member is arranged around the outer periphery of the cylinder and has a gap with the cylinder, a plurality of elastic members are arranged in the gap, and the plurality of elastic members are evenly distributed along the circumference of the cylinder, when the magnetic field generator is placed in the accommodating space, the cylinder is squeezed by the magnetic field generator to expand outward and push the elastic member outward, and at the same time, the elastic member is blocked by the limiting member and pushes the cylinder inward in the opposite direction.

[0016] Compared with the prior art, the fixing device of the present invention is provided with a cylinder and a stopper, and a plurality of elastic members evenly distributed along the circumference of the cylinder are provided in the gap between the cylinder and the stopper. When the magnetic field generator is placed in the accommodating space, the cylinder is squeezed by the magnetic field generator and expands outwards. At this time, the cylinder will push the elastic member outwards, and the elastic member will be blocked by the stopper. At this time, the elastic member will push the cylinder inwards in the opposite direction. By using the evenly distributed multiple elastic members to apply a uniform inward force to the cylinder, the magnetic field generator is prevented from being offset, and the stable fixation of the magnetic field generator is achieved, thereby ensuring the accuracy of the chip test results.

[0017] Preferably, the PCB board is provided with a plurality of first screw holes, the base of the fixing device is provided with a plurality of second screw holes corresponding to the first screw holes, and screws are passed through the first screw holes and the second screw holes to fix the base to the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the exploded structure of the fixing device according to an embodiment of the present invention.

[0019] Figure 2 1 is a top view of a base in one embodiment of the present invention.

[0020] Figure 3 is a schematic diagram of a magnetic field generator.

[0021] Figure 4 yes Figure 3 Schematic diagram of a magnetic field generator installed on a chip test probe card. DETAILED DESCRIPTION

[0022] In order to explain the content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0023] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "inside", "outside", "upper", "lower", "top", "bottom", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as limiting the protection content of the present invention.

[0024] The present invention discloses a fixing device 100 for fixing an object 300, and is particularly suitable for fixing a magnetic field generator to ensure that the magnetic field generator does not shift in position. The fixing device 100 of the present invention is described in detail below by taking the fixing device 100 for fixing the magnetic field generator 300 as an example. Figures 1 to 4 The fixing device 100 includes a base 1, which includes an elastic cylinder 11. The cylinder 11 forms a receiving space 110 for receiving the magnetic field generator 300. A stopper 12 is provided on the outside of the cylinder 11. The stopper 12 is arranged around the outer periphery of the cylinder 11 and has a gap 13 with the cylinder 11. A plurality of elastic members 14 are arranged in the gap 13. The plurality of elastic members 14 are evenly distributed along the circumference of the cylinder 11. If the fixing device 100 is required to have a positioning effect, it is obvious that the inner wall size of the cylinder 11 should be slightly smaller than the outer wall size of the magnetic field generator 300 to be fixed; therefore, when the magnetic field generator 300 is placed in the receiving space 110, the cylinder 11 will be squeezed by the magnetic field generator 300 and expand outwards. At this time, the cylinder 11 pushes the elastic member 14 outwards. Since the elastic member 14 is blocked by the limiting member 12 , the elastic member 14 will push against the cylinder 11 inwardly; that is, the multiple elastic members 14 will respectively apply an inward force to the cylinder 11 , thereby achieving stable fixation of the magnetic field generator 300 .

[0025] Specifically, the limiting member 12 is a cylindrical limiting member arranged around the outer circumference of the cylinder 11, which has a simple structure and is easy to implement. Of course, the limiting member 12 can also be any other structure that can limit the elastic member 14, for example, including a plurality of discrete components, each of which corresponds to an elastic member 14. Figure 3 As shown, the magnetic field generator 300 is cylindrical; accordingly, the inner wall profile of the cylinder 11 is cylindrical to adapt to the magnetic field generator 300. In addition, the inner wall profile of the stopper 12 and the outer wall profile of the cylinder 11 are both cylindrical, but should not be limited to this. Optionally, the cylinder 11 can be composed of two semicircular cylinders or an integrally formed cylinder, as long as it can shrink well.

[0026] See also Figure 2More specifically, the elastic member 14 is an elastic material in an arc shape, the opening of the elastic member 14 faces the limiter 12, the arc apex of the elastic member 14 fits with the outer wall of the cylinder 11, and the two end points of the elastic member 14 fit with the inner wall of the limiter 12. By setting the elastic member 14 in an arc shape, the overall structure is simple and easy to process. Of course, the elastic member 14 can also be in other forms, such as a strip spring. In this embodiment, the arc apex of the elastic member 14 is glued and fixed to the outer wall of the cylinder 11, and the two end points of the elastic member 14 are not fixed to the limiter 12. When the elastic member 14 is pushed outward by the cylinder 11, the two end points of the elastic member 14 can be displaced to a certain extent on the inner wall of the limiter 12. Of course, in other embodiments, the elastic member 14 can also be fixed by other means. Figure 2 In the structure shown, a total of eight elastic members 14 are arranged in the gap 13, and the eight elastic members 14 are arranged at equal intervals along the outer wall of the cylinder 11, and the entire base 1 is arranged axially symmetrically along its diameter direction. Preferably, the force of the elastic member 14 pressing the cylinder 11 inward is perpendicular to the outer wall of the cylinder 11, that is, the arc vertex of the elastic member 14 and the center line of the cylinder 11 and the arc vertex and the tangent line of the outer wall of the cylinder 11 are perpendicular, so that the pressing force applied by the elastic member 14 on the cylinder 11 is directed toward the center of the magnetic field generator 300, thereby better fixing the magnetic field generator 300.

[0027] Specifically, the elastic member 14, the cylinder 11 and the stopper 12 are all made of PVC. The elastic member 14 and the cylinder 11 may also be made of other elastic materials, and the stopper 12 may be made of any non-metallic material with sufficient hardness. Preferably, the elastic member 14, the cylinder 11 and the stopper 12 are all made of light materials to reduce the pressure that the PCB board 200 needs to bear.

[0028] See also Figure 1 Furthermore, the fixing device 100 further includes a cover 2, which is detachably connected to the base 1. When the cover 2 is covered on the base 1, the cover 2 can exert a force on the magnetic field generator 300 positioned on the base 1 toward the base 1, thereby further achieving stable fixation of the magnetic field generator 300. Figure 3 The top of the magnetic field generator 300 shown in the figure has a protrusion 310, and correspondingly, a avoidance hole 20 for accommodating the protrusion 310 is opened on the cover body 2. When the cover body 2 is covered on the base 1, the protrusion 310 is inserted into the avoidance hole 20, and the bottom wall of the cover body 2 just fits with the top of the magnetic field generator 300.

[0029] Please continue reading Figure 1Specifically, the base 1 further includes a horizontal baffle 15 horizontally arranged on the top surface of the limiting member 12 and shielding the elastic member 14. The horizontal baffle 15 is located outside the cylinder 11 to expose the accommodating space 110. The outer wall of the horizontal baffle 15 is flush with the outer wall of the limiting member 12. The horizontal baffle 15 is provided with a plurality of plug holes 151. The bottom wall of the cover 2 is provided with a plurality of plug posts 21 for plugging with the plug holes 151. The plug posts 21 can be inserted into the plug holes 151 to cover the cover 2 on the base 1 or pulled out from the plug holes 151 to remove the cover 2 from the base 1. By means of the design of the plug holes 151 and the plug posts 21, a detachable connection between the cover 2 and the base 1 is achieved, and the structure is simple.

[0030] In addition, the present invention also discloses a chip test probe card, which includes a PCB board 200 and a fixing device 100 (such as Figure 4 As shown in the figure, the fixing device 100 is as described above and will not be described in detail here. The PCB board 200 is provided with a plurality of first screw holes (not shown in the figure), and the base 1 is provided with a plurality of second screw holes 16 (as shown in the figure) corresponding to the first screw holes. Figure 2 As shown in the figure, screws (not shown) are inserted into the first screw hole and the second screw hole 16 to fix the base 1 to the PCB board 200. In one embodiment, the number of the first screw hole and the second screw hole 16 is four, and the four second screw holes 16 are respectively distributed at the four corners of the base 1.

[0031] Before testing using the present invention, first, place the fixing device 100 at the corresponding position of the PCB board 200; then, fix the base 1 and the PCB board 200 by screws; then, insert the magnetic field generator 300 from top to bottom into the accommodating space 110 of the cylinder 11; then, align the plug-in column 21 of the cover body 2 with the plug-in hole 151 and insert it into the plug-in hole 151 accordingly (such as Figure 4 As shown in FIG. 1 , the installation of the magnetic field generator 300 is completed. When the magnetic field generator 300 needs to be removed from the fixing device 100, first, the cover 2 covering the base 1 is pulled out upward; then, the magnetic field generator 300 is pulled out upward. The installation and removal of the magnetic field generator 300 are convenient and quick, and less time is needed.

[0032] Compared with the prior art, the fixing device 100 of the present invention is provided with a cylinder 11 and a stopper 12. A plurality of elastic members 14 are evenly distributed along the circumference of the cylinder 11 in the gap 13 between the cylinder 11 and the stopper 12. When the magnetic field generator 300 is placed in the accommodating space 110, the cylinder 11 is squeezed by the magnetic field generator 300 and expands outward. At this time, the cylinder 11 will push the elastic member 14 outward, and the elastic member 14 will be blocked by the stopper 12. At this time, the elastic member 14 will push the cylinder 11 inward in the reverse direction. The evenly distributed multiple elastic members 14 respectively apply a uniform inward force to the cylinder 11, thereby avoiding the position deviation of the magnetic field generator 300, realizing the stable fixation of the magnetic field generator 300, and thus ensuring the accuracy of the chip test results. Moreover, when the magnetic field generator 300 needs to be fixed by the fixing device 100, the magnetic field generator 300 only needs to be placed in the accommodating space 110. When the magnetic field generator 300 needs to be removed from the fixing device 100, the magnetic field generator 300 only needs to be pulled out. The installation and removal of the magnetic field generator 300 are simple and quick, and less time is required. In addition, since the cylinder 11 is elastic, the fixing device 100 can be applied to the magnetic field generator 300 with a certain size deviation.

[0033] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A chip test probe card, characterized in that: The invention comprises a PCB board and a fixing device arranged on the PCB board, wherein the fixing device comprises a base, wherein the base comprises an elastic cylinder, wherein the cylinder forms a containing space for containing a magnetic field generator, wherein a stopper is arranged on the outer side of the cylinder, wherein the stopper is arranged around the outer periphery of the cylinder and has a gap with the cylinder, wherein a plurality of elastic members are arranged in the gap, wherein the plurality of elastic members are evenly distributed along the circumference of the cylinder, and when the magnetic field generator is placed in the containing space, the cylinder is squeezed by the magnetic field generator to expand outwards and push the elastic member outwards, and at the same time, the elastic member is blocked by the stopper and pushes the cylinder inwards in the opposite direction; The force of the elastic member pressing the cylinder inward is perpendicular to the outer wall of the cylinder; The limiting member is a cylindrical limiting member arranged around the outer circumference of the cylinder; The outer wall contour of the cylinder and the inner wall contour of the limiting member are both cylindrical, the elastic member is in an arc shape, and the opening of the elastic member faces the limiting member; The arc vertex of the elastic member is in contact with the outer wall of the cylinder, and the two end points of the elastic member are in contact with the inner wall of the limiting member.

2. The chip test probe card according to claim 1, characterized in that: The elastic member is made of PVC material.

3. The chip test probe card according to claim 1, characterized in that: It also includes a cover body, which is detachably connected to the base. When the cover body covers the base, the cover body can apply a force toward the base to the object positioned on the base.

4. The chip test probe card according to claim 3, characterized in that: The base is provided with a plurality of plug-in holes, and the cover body is provided with a plurality of plug-in posts for plugging and cooperating with the plug-in holes. The plug-in posts can be inserted into the plug-in holes to cover the cover body on the base or pulled out from the plug-in holes to remove the cover body from the base.

5. The chip test probe card according to claim 1, characterized in that: The PCB board is provided with a plurality of first screw holes, the base of the fixing device is provided with a plurality of second screw holes corresponding to the first screw holes, and screws are inserted into the first screw holes and the second screw holes to fix the base to the PCB board.

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