CN112475708B

CN112475708B - Accelerometer binding post fixing device

Info

Publication number: CN112475708B
Application number: CN201910862130.9A
Authority: CN
Inventors: 刘洋; 杨杏敏; 彭福英; 彭振新; 魏超; 潘天鹏; 张敏
Original assignee: Aerospace Science and Industry Inertia Technology Co Ltd
Current assignee: Aerospace Science and Industry Inertia Technology Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2023-05-02
Anticipated expiration: 2039-09-12
Also published as: CN112475708A

Abstract

The invention relates to the technical field of machinery and discloses a binding post fixing device of an accelerometer. The device comprises a base, a first clamping line part, a second clamping line part and an elastic part, wherein a plurality of circular mounting holes are sequentially arranged on the base, a plurality of first grooves are formed in one side of the first clamping line part, a plurality of second grooves matched with the first grooves are formed in one side of the second clamping line part, a plurality of through holes corresponding to the second grooves and perpendicular to the second grooves are formed in the second clamping line part, the first clamping line part and the second clamping line part are connected on the base to enable the first grooves and the second grooves to be matched to form a plurality of combined grooves, the combined grooves correspond to the circular mounting holes on the base, the elastic part is arranged in the through holes, and a binding post penetrates through the combined grooves to be inserted into the circular mounting holes to be in contact with the bottoms of the circular mounting holes, so that force is transmitted to the binding post through force application of the elastic part, and the binding post is fastened. Therefore, the clamping and fixing of the binding posts with various sizes can be realized under the condition that the gold plating layer on the surface of the binding posts is not damaged.

Description

Accelerometer binding post fixing device

Technical Field

The invention relates to the technical field of machinery, in particular to a binding post fixing device of an accelerometer.

Background

The quartz flexible accelerometer has 5 binding posts, the surface of each binding post is plated with gold, one end of each binding post is arranged inside the watch core and is bonded with the swinging piece through a gold wire, and the other end of each binding post is arranged outside the watch core and is connected with the integrated circuit through an enameled wire. The principle of gold wire bonding is that firstly, gold wires are melted to form gold wire balls, and then a chopper drives the gold wire balls to bond the gold wires to the end face of a binding post by applying certain pressure, ultrasonic energy and thermal friction. Under ideal conditions, the surface of the binding post is smooth, the plating layer is good in quality, the stripping and falling-off phenomena are avoided, and the gold wire is firmly bonded on the end face of the binding post. In practice, the binding post is extremely fine, so that the precision of the processing technology is required to be high, the end face is in a vortex shape when observed under a microscope, and the contact area of the solder ball is small when the gold wire is welded. The binding post is made of kovar alloy, the surface gold plating is solution gold plating, various ions in the solution are easy to adsorb on the binding post to cause a plurality of impurities in a gold plating layer, and the situation that a gold wire ball cannot be transferred to the end face of the binding post can occur during bonding.

At present, in order to prevent the phenomenon that cash wire bonding is unsuccessful, the weldability of the binding posts is tested in small batches, in the welding process, the riving knife vibrates continuously, if the fixing clamp is not tightly matched with the binding posts, the binding posts vibrate along with the riving knife, and energy cannot be transmitted to the golden wire ball through the riving knife, so that welding cannot be completed. Therefore, increasing the fixing firmness of the binding post can increase the welding success rate. Because the gold wire ball bonding is also the process of forming a molten alloy layer between the end face of the gold wire ball and the end face of the binding post, the increase of the temperature of the workpiece is also beneficial to improving the welding success rate in practice. Original terminal fixing tool is the round hole, if the terminal cooperation is too tight, follow-up terminal taking out is comparatively difficult, if the cooperation is not tight, can't accomplish the welding to there is not heating temperature regulating device, original terminal fixing fixture verifies that the yield is low partially, consequently, what need be urgent is a novel take heating makes the terminal homoenergetic fit in the tolerance range, and the terminal is got easily and is put, does not harm the terminal mounting fixture of surface gilding layer.

Disclosure of Invention

The invention provides a binding post fixing device of an accelerometer, which can solve the problems in the prior art.

The invention provides a binding post fixing device of an accelerometer, which comprises a base, a first clamping line part, a second clamping line part and an elastic part, wherein a plurality of circular mounting holes are sequentially arranged on the base, one side of the first clamping line part is provided with a plurality of first grooves, one side of the second clamping line part is provided with a plurality of second grooves matched with the plurality of first grooves, the second clamping line part is also provided with a plurality of through holes which correspond to the plurality of second grooves and are perpendicular to the plurality of second grooves, the first clamping line part and the second clamping line part are connected to the base so that the plurality of first grooves and the plurality of second grooves are matched to form a plurality of combined grooves, the plurality of combined grooves correspond to the plurality of circular mounting holes on the base, the elastic part is arranged in the plurality of through holes, and the binding post penetrates through the combined grooves to be inserted into the circular mounting holes to be contacted with the bottoms of the circular mounting holes, and force is conducted to the binding post by applying force to the elastic part so that the binding post is fastened.

Preferably, the device further comprises a heating plate, a lead wire and an external temperature control unit, wherein the heating plate is arranged on the outer side of the base and is connected with the external temperature control unit through the lead wire.

Preferably, the first groove is a V-shaped groove, the second groove is a half-circular groove, and the combined groove is a half-V-shaped half-circular groove.

Preferably, the through hole includes a first through hole portion and a second through hole portion, the elastic portion is provided in the second through hole portion and has a length larger than that of the second through hole portion, the first through hole portion has a screw thread, and the elastic portion is forced by a screw engaged with the screw thread during tightening to fasten the binding post.

Preferably, the diameter of the second through hole portion is smaller than the diameter of the first through hole portion.

Preferably, the elastic part is a cylindrical rubber column.

Preferably, the material of the cylindrical rubber column is teflon.

Preferably, the base, the first wire clamping portion and the second wire clamping portion are provided with threaded holes, and the first wire clamping portion and the second wire clamping portion are fixedly connected to the base through screws matched with the threaded holes.

Through above-mentioned technical scheme, can utilize a plurality of circular mounting holes on the base to carry out coarse positioning to the lower half section of the terminal of accelerometer, fix the upper half section of terminal through the integrated slot to through the elastic component that sets up in the through-hole will receive external force transmission to the terminal in order to further fix the terminal lower half section. Therefore, the clamping and fixing of binding posts with various sizes can be realized under the condition that the gold plating layer on the surface of the binding posts is not damaged, and the success rate of gold ball bonding is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic structural view of an accelerometer post fixing device according to an embodiment of the invention;

FIG. 2 is a cross-sectional view taken along line D-D of FIG. 1;

FIG. 3 is a schematic view of a first clamp post of an accelerometer post fixing device according to an embodiment of the invention;

FIG. 4 is a right side view of FIG. 3;

FIG. 5 is a schematic diagram of a second post of an accelerometer post fixing device according to an embodiment of the invention;

FIG. 6 is a right side view of FIG. 5;

fig. 7 is a cross-sectional view of fig. 5.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

FIG. 1 shows a schematic structural view of an accelerometer post fixing device according to an embodiment of the invention; fig. 2 is a cross-sectional view taken along D-D in fig. 1.

FIG. 3 is a schematic view of a first clamp post of an accelerometer post fixing device according to an embodiment of the invention; fig. 4 is a right side view of fig. 3.

FIG. 5 is a schematic diagram of a second post of an accelerometer post fixing device according to an embodiment of the invention; FIG. 6 is a right side view of FIG. 5; fig. 7 is a cross-sectional view of fig. 5.

The accelerometer binding post fixing device can be applied to a quartz flexible accelerometer, for example.

As shown in fig. 1 to 7, the embodiment of the present invention provides a post fixing device for an accelerometer, wherein the device comprises a base, a first wire clamping part 1, a second wire clamping part 2 and an elastic part, a plurality of circular mounting holes 8 are sequentially arranged on the base, a plurality of first grooves 5 are arranged on one side of the first wire clamping part 1, a plurality of second grooves 4 matched with the plurality of first grooves 5 are arranged on one side of the second wire clamping part 2, the second wire clamping part 2 further comprises a plurality of through holes which correspond to the plurality of second grooves 4 and are perpendicular to the plurality of second grooves 4, the first wire clamping part 1 and the second wire clamping part 2 are connected on the base so that a plurality of first grooves 5 and the plurality of second grooves 4 are matched to form a plurality of combined grooves, the plurality of combined grooves correspond to the plurality of circular mounting holes 8 on the base, the elastic part is arranged in the plurality of through holes, the second wire clamping part 2 is inserted into the circular mounting holes 8 through the combined grooves to contact with the bottoms of the circular mounting holes 8, and the force is applied to the post by fastening the post.

The binding post may have a cylindrical structure with a thin upper portion and a thick lower portion, and the lower portion has a length longer than that of the upper portion, but the present invention is not limited thereto. For example, the post may have a cylindrical structure having the same vertical dimension. The surface of the binding post can be wholly plated with gold, and the end face of the upper part is welded with a gold wire ball.

For example, the first wire clamping part 1 and the second wire clamping part 2 are connected on the base, the elastic part is arranged in the through hole of the second wire clamping part 2, the binding post can be ensured to be inserted into the circular mounting hole 8 to be contacted with the bottom of the circular mounting hole 8 through the combination groove by applying force in the vertical direction, and then different pressures can be applied to the elastic part on the side surface, the force is conducted to the binding post through the elastic part, the binding posts with different sizes can be ensured to be reliably fixed in the fixing device, and therefore, the gold wire ball bonding can be performed. And after the gold wire ball is bonded, the external force applied to the elastic part is released, and the binding post can be taken out of the fixing device, so that the fixing device can be reused.

According to one embodiment of the invention, the device further comprises a heating plate 6, a lead wire 7 and an external temperature control unit, wherein the heating plate 6 is arranged outside the base and is connected with the external temperature control unit through the lead wire 7.

Therefore, the heating temperature control (for example, about 100 ℃) can be carried out in the process of fixing the wire connecting column, so that the probability of gold wire bonding failure caused by low temperature of a workpiece is reduced, and the gold wire bonding efficiency is further improved.

For example, the heating plate can be adhered to the circumferential side surface of the base, and is connected with the external temperature control unit through the lead wire to heat the base, so that a plurality of circular mounting holes sequentially arranged on the base are heated, the temperature is transferred to the binding post, and the gold wire ball bonding is performed at the moment, so that the success rate of the gold wire ball bonding can be further improved.

According to one embodiment of the present invention, as shown in fig. 3 and 5, the first groove 5 is a V-shaped groove, the second groove 4 is a half-circular groove, and the combined groove is a half-V-shaped half-circular groove.

By providing the first groove 5 in a V-shape, it is possible to more effectively fix various different sizes of posts.

According to one embodiment of the present invention, as shown in fig. 6 to 7, the through hole includes a first through hole portion 9 and a second through hole portion 10, the elastic portion is provided in the second through hole portion 10 and the length of the elastic portion is greater than the length of the second through hole portion 10, the first through hole portion 9 has a screw thread, and the binding post is fastened by applying force to the elastic portion during tightening by a screw engaged with the screw thread.

The length of the screw is larger than that of the first through hole part 9, and the screw is screwed, the elastic part on the side face is used for applying force to the wiring column, so that the wiring column is clamped with the fixing device, and the purpose of fixing the wiring column is achieved without damaging the gold plating layer on the surface of the wiring column. That is, the fixing device provided by the embodiment of the invention reduces the damage to the gold plating layer on the surface of the terminal during the fixing process, and has the advantages of simple operation and strong repeatability.

According to one embodiment of the invention, the diameter of the second through hole part 10 is smaller than the diameter of the first through hole part 9.

According to one embodiment of the invention, the elastic portion is a cylindrical rubber column.

According to one embodiment of the invention, the material of the cylindrical rubber column is teflon.

As a preferred embodiment of the present invention, the torque applied to the apply screw may range from 50 N.m to 200 N.m.

According to one embodiment of the invention, the base, the first wire clamping part 1 and the second wire clamping part 2 are provided with threaded holes 3, and the first wire clamping part 1 and the second wire clamping part 2 are fixedly connected to the base through screws matched with the threaded holes 3.

As shown in fig. 1, 3 and 5, the first wire clamping part 1 and the second wire clamping part 2 are respectively provided with two threaded holes 3, and 4 threaded holes 3 can be arranged on the base, wherein two of the threaded holes are matched with the two threaded holes of the first wire clamping part 1 for fixing the first wire clamping part 1, and the other two of the threaded holes are matched with the two threaded holes of the second wire clamping part 2 for fixing the second wire clamping part 2.

For example, by applying the binding post fixing device in the production process of the quartz flexible accelerometer, the binding post can be effectively fixed in the gold wire ball welding process, the gold plating layer on the surface of the binding post is not damaged, and the welding yield is improved.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The device is characterized by comprising a base, a first clamping line part (1), a second clamping line part (2) and an elastic part, wherein a plurality of circular mounting holes (8) are sequentially arranged on the base, a plurality of first grooves (5) are formed on one side of the first clamping line part (1), a plurality of second grooves (4) matched with the plurality of first grooves (5) are formed on one side of the second clamping line part (2), the second clamping line part (2) is further provided with a plurality of through holes corresponding to the plurality of second grooves (4) and perpendicular to the plurality of second grooves (4), the first clamping line part (1) and the second clamping line part (2) are connected on the base, so that a plurality of first grooves (5) and the plurality of second grooves (4) are matched to form a plurality of combined grooves, the plurality of combined grooves correspond to the plurality of circular mounting holes (8) on the base, the elastic part is arranged in the plurality of through holes, the elastic part penetrates through the combined grooves (4) to penetrate through the second grooves (8) and is provided with a plurality of through holes (10) which are in a large part of the elastic part, the elastic part is contacted with the second through hole (10), the elastic part is provided with the through hole (10), the elastic part is provided with a large force is applied to the through hole part (10), the elastic part is forced to fasten the binding post by the screw matched with the thread during the screwing process.

2. The device according to claim 1, further comprising a heating plate (6), a lead (7) and an external temperature control unit, wherein the heating plate (6) is arranged outside the base and is connected with the external temperature control unit through the lead (7).

3. The device according to claim 2, characterized in that the first groove (5) is a V-groove, the second groove (4) is a half-groove, and the combined groove is a half-V-groove.

4. The device according to claim 1, characterized in that the diameter of the second through hole portion (10) is smaller than the diameter of the first through hole portion (9).

5. The device of any one of claims 1-4, wherein the resilient portion is a cylindrical rubber column.

6. The device of claim 5, wherein the material of the cylindrical rubber column is teflon.

7. The device according to any one of claims 1-4, characterized in that the base, the first wire clamping part (1) and the second wire clamping part (2) are each provided with a threaded hole (3), the first wire clamping part (1) and the second wire clamping part (2) being fixedly connected to the base by means of screws cooperating with the threaded holes (3).