CN216699741U

CN216699741U - Voice coil motor base

Info

Publication number: CN216699741U
Application number: CN202122487343.3U
Authority: CN
Inventors: 刘松华; 徐国炜
Original assignee: Suzhou Yunzhong Electronic Technology Co ltd
Current assignee: Suzhou Yunzhong Electronic Technology Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-06-07
Anticipated expiration: 2031-10-15

Abstract

The utility model relates to a voice coil motor base which comprises a plastic base, a metal circuit and an electronic element, wherein the metal circuit and the electronic element are coated in the plastic base, the metal circuit comprises a welding end and a connecting arm, the welding end is connected with the connecting arm, a groove is formed in the plastic base, the welding end and part of the connecting arm are exposed on a concave surface in the groove, a partition block is arranged in the groove, a welding surface is arranged on the plastic base, the partition block completely partitions an exposed surface of the welding end and an exposed surface of the connecting arm in the orthographic projection direction of the welding surface and partitions the groove into two different parts, and the exposed areas of the welding end are close to or identical under the partition effect of the partition block. The utility model has the advantages that the partition block is additionally arranged in the groove, so that the effect of controlling the size of the exposed area of the welding end is achieved, the problem that the electronic element is deviated due to the rolling of the liquid solder ball when the electronic element is welded with the welding end is solved, and the electric conductivity and the welding effect of the electronic element are ensured.

Description

Voice coil motor base

Technical Field

The utility model relates to the technical field of voice coil motors, in particular to a voice coil motor base.

Background

The conventional voice coil motor base generally includes a plastic base, a metal circuit disposed in the plastic base, and an electronic component soldered to the metal circuit. In order to ensure that the welding end of the metal circuit welded with the electronic component is exposed on the plane where the welding feet of the electronic component are located, the welding end of the metal circuit needs to be bent, so that the welding end of the metal circuit is arranged in a specified area of the plane where the welding feet of the electronic component are located. However, because of the requirement of the interval arrangement of the metal circuits, it is difficult to ensure that the exposed areas of the solder terminals of the metal circuits on the plastic base are consistent, when the electronic component is soldered with the solder terminals of the metal circuits in an smt (surface Mounting technology) manner, during the process of passing through a reflow oven, the fluidity of the solder paste in a molten state on the surface of the metal circuits is large, and the inconsistent areas of the solder terminals of the metal circuits may cause different offsets of the solder paste on different solder terminals, thereby causing the electronic component to synchronously offset under the influence of the offset force of the solder paste, and affecting the conductivity of the electronic component.

In the utility model patent of publication No. CN208723959U, this type of plastic base adopts SMT's mode to be connected electronic component with the welded end that exposes the metal circuit in the plastic recess, but this type of plastic base stretches into the metal circuit part in the plastic base recess and all is the state that exposes, cuts off through the spacing groove between the metal circuit, and this can only prevent to take place to contact and cause the phenomenon of short circuit to take place at the in-process of moulding plastics between the metal circuit, can not control the area size of welded end. In the welding process, the liquid tin beads roll on the welding ends with different areas in different degrees to drive the electronic element to be inclined or deviated, so that the welding quality is reduced, and the conductivity of the electronic element is influenced.

Based on the problem that the area size of weld end is inconsistent, utility model patent that publication number is CN210469886U discloses a processing mode, adopts the mode of bending to make the surface of plastic base expose the weld end that the area is the same to control the welding effect to the electronic component leg, but the surface of this type of plastic base does not make the plastic recess of electronic component embedding, can lead to the whole of plastic base to be thicker. Generally, the plastic base provided with the plastic groove generally has higher metal circuit arrangement requirements, and therefore, under the condition that complex metal circuit arrangement is performed, the problem that the operation difficulty is high and the operation precision is low can be caused by the adoption of a mode of bending the welding end for multiple times to perform welding area treatment.

Therefore, there is a need to provide a new voice coil motor base to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a voice coil motor base, which is used for solving the problem that when an electronic element is welded with a welding end, a liquid solder ball rolls to cause the electronic element to deviate, and ensuring the electric conductivity and the welding effect of the electronic element.

The purpose of the utility model is realized by the following technical scheme: the utility model provides a voice coil motor base, includes plastic base, cladding in metal circuit and electronic component in the plastic base, metal circuit includes a plurality of branch roads that are the interval and arrange, the branch road include with electronic component welded solder terminal and linking arm, the solder terminal with the linking arm is connected, its characterized in that, be provided with on the plastic base and accomodate electronic component's recess, solder terminal and part the linking arm is equipped with and exposes the exposal surface of recess, be provided with in the recess and separate the fault block, separate the fault block with completely cut off between the exposal surface of solder terminal with the exposal surface of linking arm.

Preferably, the exposed surfaces of the solder terminals to which the same electronic component is soldered are similar or identical in area.

Preferably, at least two welding terminals for welding different electronic components are arranged on the same branch of at least part of the branches, and at least two welding terminals of the same branch are connected together through a connecting arm.

Preferably, the plastic base is provided with a top surface and a bottom surface, and the groove is arranged on the top surface, the bottom surface or a vertical surface of the plastic base perpendicular to the top surface and/or the bottom surface.

Preferably, a concave surface is arranged in the groove, a plurality of limiting grooves which are concavely arranged are arranged between the different welding ends on the concave surface, and the limiting grooves are distributed on the adjacent three side surfaces of each welding end.

Preferably, the exposed surface of the solder terminal and the exposed surface of the connecting arm are flush with the recessed surface within the recess.

Preferably, the plastic base is formed through the mode of secondary injection molding, the plastic base includes the insulating block, the insulating block is through once injection molding formation and will welding end and part the linking arm carries out the cladding, the whole of plastic base is through the secondary injection molding formation with all the other metal circuit with the insulating block carries out the cladding, the recess sets up on the insulating block.

Preferably, the electronic component includes a first electronic component having at least four solder tails and a second electronic component having at least two solder tails, and the solder tails of the electronic component are electrically connected to corresponding solder terminals of the metal circuit by an SMT process.

Preferably, the outer surface of the partition block protrudes out of the recessed surface and divides the groove into at least two different parts to accommodate the first electronic component and the second electronic component, respectively, the partition block is provided with a notch located outside the metal circuit region, and the notch is communicated with the at least two divided parts of the groove.

Preferably, the outer surface of the partition block and the concave surface are located on the same plane, the connecting arm is provided with a bending portion located below the partition block and formed by bending the partition block in a following manner, the connecting arm is connected with the welding end through the bending portion, and the bending portion is wrapped in the insulating block.

Preferably, a partition step for partitioning the groove into two different parts is arranged on the recessed surface between the first electronic component and the second electronic component, and a gap for communicating the two different parts is arranged on the partition step.

Preferably, the bent portion is formed by stamping a metal circuit.

According to the voice coil motor base, the partition block is additionally arranged in the groove, so that the effect of controlling the size of the exposed area of the welding end is achieved, the problem that the electronic element is deviated due to the fact that the liquid solder balls roll when the electronic element and the welding end are welded can be solved while the waterproof glue storage amount can be guaranteed through the partition block, and the electric conductivity and the welding effect of the electronic element are guaranteed.

Drawings

Fig. 1 is a perspective view of a voice coil motor base showing a bottom surface according to the present invention.

Fig. 2 is a perspective view of the voice coil motor base showing the top surface according to the present invention.

Fig. 3 is a top view of a voice coil motor base according to the present invention.

Fig. 4 is a bottom view of a voice coil motor base according to the present invention.

Fig. 5 is an exploded perspective view of a voice coil motor base according to the present invention.

FIG. 6 is a perspective view of a solder bump and an insulator block of a voice coil motor base according to the present invention.

Fig. 7 is a partially enlarged view of the area a in fig. 6.

FIG. 8 is a perspective view of a highlighted solder terminal metal circuit in the voice coil motor base of the present invention.

Fig. 9 is a partially enlarged view of the region B in fig. 8.

Description of the main elements

Please refer to the following reference numerals: 10-plastic base, 101-bottom surface, 102-top surface, 11-insulating block, 111-soldering surface, 12-groove, 121-recessed surface, 13-separating step, 14/14 '-separating block, 141/141' -outer surface, 15-limiting groove, 16/16 '-notch, 20-metal circuit, 21-bending part, 22-soldering end, 23-connecting arm, 201/201' -exposed surface, 30-first electronic component, 31-second electronic component.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or assembly must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

A voice coil motor base as shown in fig. 1 to 5, comprising a plastic base 10, a metal circuit 20 coated in the plastic base 10, and an electronic component 30/31, wherein the plastic base 10 includes a bottom surface 101, and a top surface 102 disposed opposite to the bottom surface 101, and as shown by the direction labels in fig. 2, only in this patent, the direction from the top surface 102 to the bottom surface 101 is defined as bottom, and the direction opposite to the direction defined as bottom is defined as top, the metal circuit 20 includes a plurality of branches, the branches are arranged at intervals, that is, the branches do not interfere with each other, the branches include a welding end 22 and a connecting arm 23, the welding end 22 is connected to the connecting arm 23, wherein the welding end 22 is a portion of the branch welded to an electronic component 30/31, and the connecting arm 23 is the rest portion of the branches except the welding end 22, the plastic base 10 is provided with a groove 12 for accommodating the electronic component 30/31 and limiting the electronic component 30/31, a surface of the plastic base 10 on which the groove 12 is provided is a soldering surface 111, a surface of the groove 12 located on the orthographic projection of the soldering surface 111 is a recessed surface 121, at least two soldering terminals 22 for soldering different electronic components 30/31 may be provided on the same branch of at least part of the branches, so that the soldering terminals 22 correspond to the solder tails of the electronic components 30/31 for facilitating electrical connection, the electronic component 30/31 includes a first electronic component 30 having at least four solder tails and a second electronic component 31 having at least two solder tails, the solder tails of the electronic component 30/31 are electrically connected to the soldering terminals 22 by an SMT process, the first electronic component 30 may be a Hall (Hall) or Integrated Circuit (IC) component, and the second electronic component 31 may be a capacitor or an inductor. The metal circuit 20 is bent at the edge of the groove 12 to fit the shape of the groove 12, the solder terminal 22 and a part of the connecting arm 23 are exposed on the recessed surface 121, and the exposed surface of the solder terminal 22 and a part of the connecting arm 23 on the recessed surface 121 is an exposed surface 201/201 ', i.e. the exposed surface 201 of the solder terminal 22 exposed in the groove 12 and the exposed surface 201' of the connecting arm 23 are located on the same plane. The groove 12 is provided with a separating block 14, the orthogonal projection surface of the welding surface 111 of the separating block 14 is an outer surface 141, the separating block 14 completely separates the exposed surface 201 of the welding terminal 22 from the exposed surface 201' of the connecting arm 23 in the orthogonal projection direction of the outer surface 141, and the outer surface 141 protrudes from the recessed surface 121 and is located between the recessed surface 121 and the welding surface 111, i.e. the distance from the outer surface 141 to the welding surface 111 is smaller than the distance from the recessed surface 121 to the welding surface 111, so that the separating block 14 can separate the groove 12 into two different parts. As shown by the direction labels in fig. 2, the directions from the recessed surface 121 to the soldering surface 111 are defined as outer and the opposite directions are defined as inner only in this patent, and the areas of the exposed surfaces 201 of the soldering terminals 22 of the first electronic component 30 are similar or identical under the separation action of the separation block 14, wherein the similar areas of the exposed surfaces 201 means that the difference between the areas of any two exposed surfaces 201 of the soldering terminals 22 is not more than 20%. When the partition block 14 is disposed on the metal circuit 20 between the first electronic component 30 and the second electronic component 31, the partition block 14 is provided with a notch 16 so that the waterproof glue applied after the electronic component 30/31 is electrically connected to the soldering terminal 22 can flow to any position in the groove 12, the notch 16 is not disposed in the area where the metal circuit 20 is located, that is, although the notch 16 is left, the partition block 14 still completely separates the soldering terminal 22 from the connecting arm 23, and in addition, the partition block 14 can also play a role of blocking the waterproof glue from flowing too much, so that a sufficient amount of waterproof glue can be left around each electronic component 30/31 to ensure the waterproof performance of the electronic component 30/31.

It should be additionally noted that the above-mentioned directional references in fig. 2 are only used to refer to this example, wherein the outer direction may be the same as the top direction, or the same as the bottom direction, or even any direction perpendicular to the top direction and/or the bottom direction, and since these are all associable examples, they are not listed in this patent. Based on the above description, the soldering plane 111 may be coplanar with the bottom surface 101 or the top surface 102, or perpendicular to the bottom surface 101 and/or the top surface 102.

As shown in fig. 5, the plastic base 10 includes an insulating block 11, the welding end 22 is first subjected to one-time injection molding to form the insulating block 11, so as to coat the welding end 22 and a part of the connecting arm 23, which is convenient for more accurately fixing the welding end 22, after the first electronic component 30 and the second electronic component 31 are welded to the welding end 22, the whole plastic base 10 is then subjected to two-time injection molding to coat the rest of the metal circuit 20 and the insulating block 11. At this time, the insulation block 11 is integrally formed as a part of the plastic base 10, the groove 12 is disposed on the insulation block 11, the insulation block 11 may be located on the bottom surface 101, the top surface 102 of the plastic base 10 or on a vertical surface of the plastic base 10 perpendicular to the bottom surface 101 and/or the top surface 102, and at this time, the welding surface 111 is a surface of the insulation block 11 on which the groove 12 is disposed.

In another embodiment, as shown in fig. 6 and 7, the outer surface 141 'of the spacer 14' and the recessed surface 121, the soldering terminals 22 and the connecting arm 23 located in the groove 12 and exposed on the recessed surface 121 are all located on the same plane, an inwardly recessed limiting groove 15 is disposed on the recessed surface 121 between the different soldering terminals 22, and the limiting grooves 15 are distributed on three adjacent sides of each soldering terminal 22 to space the soldering terminals 22 to prevent the different soldering terminals 22 from contacting each other to cause short circuit. The recessed surface 121 is provided with a blocking step 13, the blocking step 13 has the same structure as the blocking block 14 in the previous embodiment, but it is not necessary to completely block the exposed surface 201 of the welding terminal 22 from the exposed surface 201 'of the connecting arm 23, that is, the blocking step 13 only plays a role of blocking the excessive flow of the waterproof glue similar to the blocking block 14 in the previous embodiment, and a notch 16' is provided on the blocking step 13 for allowing the waterproof glue to flow to any position in the groove 12.

As shown in fig. 8 and 9, the connecting arm 23 under the spacer 14 is provided with a bent portion 21 that is bent to conform to the spacer 14', the bent portion 21 is located at the connection point of the connecting arm 23 and the welding end 22, the bent portion 21 is wrapped in the insulating block 11 shown in fig. 6 and 7, and the bent portion 21 is formed by stamping.

The example of fig. 6 to 9 is to provide the partition block 14' and the partition step 13 separately, in order to freely arrange the positions of the partition step 13 and the welding terminal 22, and in this case, the area of the welding terminal 22 is controlled without considering the position of the partition step 13.

According to the utility model, the exposed surface 201 of the welding end 22 and the exposed surface 201' of the connecting arm 23 are completely isolated by arranging the isolating block 14, so that the effect of controlling the area of the exposed surface 201 of the welding end 22 is achieved, the problem that the electronic element 30/31 is deviated due to the rolling of a liquid solder ball when the electronic element 30/31 is welded with the welding end 22 is solved, the electric conductivity and the welding effect of the electronic element 30/31 are ensured, and meanwhile, the outer surface 141 of the isolating block 14 protrudes out of the concave surface 121 to play a role in preventing the waterproof glue from flowing excessively; in another embodiment of the present invention, the partition block 14 'is separated from the partition step 13, so that the partition block 14' can be freely disposed, and thus the area of the exposed surface 201 of the soldering terminal 22 can be more accurately controlled, and since the function of blocking the excessive flow of the waterproof adhesive is embodied by the separated partition step 13, the outer surface 141 'of the partition block 14' and the recessed surface 121 are located on the same plane, such a structure can reserve sufficient space for soldering the electronic component 30/31, and at the same time, reduce the surface protruding out of the recessed surface 121, so that the waterproof adhesive can more easily flow to any position in the groove 12.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

The above description is only a part of the embodiments of the present invention, and not all embodiments, and any equivalent variations of the technical solutions of the present invention, which are made by those skilled in the art through reading the present specification, are covered by the claims of the present invention.

Claims

1. The utility model provides a voice coil motor base, includes plastic base, cladding in metal circuit and the electronic component in the plastic base, metal circuit includes a plurality of branch roads that are the interval and arrange, the branch road include with electronic component welded weld end and linking arm, the weld end with the linking arm is connected, its characterized in that, be provided with on the plastic base and accomodate electronic component's recess, weld end and part the linking arm is equipped with and exposes the face of the recess, be provided with in the recess and separate the fault block, separate the fault block with completely cut off between the face of the exposing of weld end with the face of the exposing of linking arm.

2. The vcm base of claim 1, wherein the exposed surfaces of the solder terminals for soldering the same electronic component have similar or identical areas.

3. The vcm base of claim 2, wherein at least two soldering terminals for soldering different electronic components are disposed on a same branch of at least some of the branches, and at least two soldering terminals of the same branch are connected together by a connecting arm.

4. The vcm pedestal of claim 1, wherein the plastic base is provided with a top surface and a bottom surface, and the groove is provided on the top surface, the bottom surface, or a vertical surface of the plastic base perpendicular to the top surface and/or the bottom surface.

5. The voice coil motor base as claimed in claim 1, wherein a recessed surface is formed in the recess, and a plurality of inwardly recessed limiting grooves are formed on the recessed surface between the soldering terminals, and the limiting grooves are distributed on three adjacent sides of each soldering terminal.

6. The voice coil motor base of claim 5, wherein the exposed surface of the solder end and the exposed surface of the connection arm are flush with the recessed surface within the recess.

7. The voice coil motor base of claim 6, wherein the plastic base is formed by two-shot molding, the plastic base comprises an insulating block, the insulating block is formed by one-shot molding and covers the welding end and a part of the connecting arm, the whole plastic base is formed by two-shot molding to cover the rest of the metal circuit and the insulating block, and the groove is formed on the insulating block.

8. The vcm base of claim 7, wherein the electronic components comprise a first electronic component having at least four solder tails and a second electronic component having at least two solder tails, the solder tails of the electronic components being electrically connected to corresponding solder terminals of the metal circuit by SMT.

9. The vcm base of claim 8, wherein the outer surface of the blocking portion protrudes outward from the recessed surface and divides the recess into at least two different portions for respectively receiving the first electronic component and the second electronic component, the blocking portion is provided with a gap outside the metal circuit region, and the gap is in communication with the at least two divided portions of the recess.

10. The vcm base of claim 9, wherein the outer surface of the blocking portion and the recessed surface are located on the same plane, the connecting arm has a bending portion located below the blocking portion and formed by bending along the blocking portion, the connecting arm is connected to the soldering terminal through the bending portion, and the bending portion is wrapped in the insulating block.

11. The vcm base of claim 10, wherein a partition step for partitioning the recess into two different portions is disposed on the recessed surface between the first electronic component and the second electronic component, and the partition step is provided with a gap for communicating the two different portions.

12. The vcm base of claim 10, wherein the bend is stamped and formed from a metal circuit.