Base and motor integrated with coil

Abstract

The present invention relates to a base and motor with integrated coils. The base with integrated coils includes an insulating base, a metal circuit, and a wound coil electrically connected to the metal circuit. The coil includes an initial lead and a final lead, with the final lead extending at a higher position than the initial lead along the thickness of the coil. The metal circuit includes a plurality of branches, each of which includes connecting pins disposed on the insulating base. The connecting pins include a first connecting pin electrically connected to the initial lead and a second connecting pin electrically connected to the final lead, with the first connecting pin being lower than the second connecting pin along the thickness of the coil. The base with integrated coils in the present invention effectively improves the electrical connection reliability of the initial and final leads of the coil by providing a height difference between the first and second connecting pins of the two branches electrically connected to the coil in the thickness direction of the coil.

Description

Technical Field

[0001] The present invention relates to the technical field of a base and a motor integrated with a coil, and in particular to a base and a motor integrated with a coil for use in the field of electronic equipment. Background Art

[0002] Existing bases and motors with coils usually include a base, a metal circuit injection-molded into the base, electronic components welded to the metal circuit, a coil mounted on the base, and a driving component such as a magnetic structure that interacts with the coil. Generally, motor assemblers need to electrically assemble the above basic components. For example, the two leads of the coil formed by winding need to be positioned on the welding feet of the corresponding branches of the corresponding metal circuit, and to achieve positioning welding. In the actual production of coils, the coils are wound from bottom to top and from inside to outside, that is, the initial lead of the coil is located at the innermost position of the bottom layer of the coil, and the end lead of the coil is located at the outermost position of the top layer of the coil. The relative height difference between the two leads of the coil causes the welding distance between it and the welding feet of the branches located in the same horizontal plane to be different.

[0003] For example, the invention patent application with publication number CN113193723A discloses a first coil disposed on a base. The first coil is connected to a conductor via a connection portion, and the second coil is connected to the first coil. The first coil has two leads and solder legs of the conductor that match the two leads. The two leads of the first coil are soldered to two solder legs of the conductor at the same height in the vertical direction.

[0004] Another example is the invention patent application with publication number CN110098710A. The patent discloses that coils are welded on both sides of the base. The two coils are electrically connected to the terminals in the base. The terminals adopt a three-section structure, in which one semicircular arc serves as the conducting medium between the two coils, and the remaining two sections connect the coils to the positive and negative poles of the power supply. This patent only has two coils, which can only achieve the function of vertical focusing of the motor product, and its anti-shake effect is not good. In addition, the two coils are arranged vertically, and the two leads of each coil are welded to a pair of horizontally arranged and equal-height welding feet of the terminal.

[0005] The two prior arts described above disclose that the leads of the coils are both welded to two spaced-apart welding pins on the same horizontal plane. Neither of them takes into account the height difference between the leads of the wound coil and the thickness direction of the coil, which causes the problem of difference in welding distance of the leads. The difference in welding distance between the leads and the welding pins will inevitably cause the welding distance of the relatively high end leads to be too long, which will in turn cause unreliable welding or even breakage, affecting product performance and service life; and excessive welding distance will cause poor signal effect of the coil, affecting the motion accuracy of the motor. On the other hand, the initial lead at a relatively low position is located at the bottom layer of the coil and spans the inner and outer layers of the coil, which will cause the bottom surface of the coil to tilt relative to the contact surface of the base when the coil is placed, causing the coil to shake. In order to avoid the coil from tilting, it is usually necessary to do glue adjustment at the bottom of the coil. The glue will form a step surface, which will also easily cause the initial lead to break during the welding process, affecting the product and service life.

[0006] Therefore, it is necessary to provide a new base and motor integrated with a coil to overcome the above-mentioned defects. Summary of the Invention

[0007] The object of the present invention is to provide a base and a motor integrated with a coil, wherein the branches of the metal circuit of the base are provided with connecting pins with height differences to compensate for the height difference between the lead-out positions of the initial lead and the final lead of the coil, thereby improving the electrical connection stability of the coil.

[0008] The object of the present invention is achieved through the following technical solution 1: A base with an integrated coil, comprising an insulating base, a metal circuit embedded in the insulating base, and a wound coil fixed on the insulating base and electrically connected to the metal circuit, the coil comprising an initial lead and a final lead, the lead-out position of the final lead being higher than the lead-out position of the initial lead along the thickness direction of the coil, the metal circuit comprising several branches, each of the several branches comprising a connecting pin arranged on the insulating base, the connecting pin comprising a first connecting pin electrically connected to the initial lead and a second connecting pin electrically connected to the final lead, the first connecting pin being lower than the second connecting pin along the thickness direction of the coil.

[0009] Furthermore, the initial lead and the final lead are respectively arranged on two opposite sides of the coil, and the first connecting pin and the second connecting pin are respectively exposed on the insulating base on two opposite sides of the coil.

[0010] Furthermore, the first connecting pin and the second connecting pin are both provided with connecting surfaces electrically connected to the corresponding initial lead and the final lead, and the insulating base is recessed corresponding to the lead-out position of the initial lead to form a recessed groove to accommodate the initial lead, and the recessed groove has a bottom surface and a side surface, and the depth of the recessed groove is greater than or equal to the thickness of the initial lead.

[0011] Furthermore, the bottom surface of the recessed groove is higher than or flush with the connection surface of the first connection pin along the thickness direction of the coil, and the connection surface of the second connection pin is higher than the connection surface of the first connection pin along the thickness direction of the coil.

[0012] Furthermore, at least two positioning posts are protruded at intervals on the insulating base, the coil is sleeved outside the at least two positioning posts, at least two positioning posts are respectively located at two opposite ends of the coil, and at least part of the side wall of the positioning post close to the initial lead is located in the recessed groove.

[0013] Furthermore, the insulating base includes a plastic positioning block that is injection molded once and a plastic body that is injection molded on the plastic positioning block and the metal circuit through secondary injection molding. The plastic positioning block is injection molded on the periphery of the connecting pin and exposes the connecting surface of the connecting pin. The plastic body forms a positioning hole for accommodating the plastic positioning block, and the top surface of the plastic positioning block is exposed to the plastic body.

[0014] Furthermore, the base with integrated coils also includes at least two coils arranged at intervals, the end lead and the initial lead between two adjacent coils are arranged adjacent to each other, and the second connecting pin and the first connecting pin corresponding to the end lead and the initial lead share one plastic positioning block.

[0015] Furthermore, the plastic positioning block includes a coil connecting portion, which includes a first connecting block, a second connecting block and a first step portion formed between the first connecting block and the second connecting block, the first connecting block is lower than the second connecting block along the thickness direction of the coil, the connecting surface of the first connecting pin is exposed to the first connecting block, the connecting surface of the second connecting pin is exposed to the second connecting block, and the bottom surface of the recessed groove is higher than or flush with the top surface of the first connecting block along the thickness direction of the coil.

[0016] Furthermore, the insulating base is correspondingly provided with a first groove for accommodating each of the coils, the bottom surface of the coil is against the bottom surface of the first groove, a second step portion is formed between the bottom surface of the recessed groove and the bottom surface of the first groove, and the top surface of the second connecting block is flush with the bottom surface of the first groove.

[0017] Furthermore, at least two of the coils include a first coil and a third coil that are arranged opposite to each other and connected in series, and the branches include at least a first coil branch, a second coil branch, and a fifth coil branch. The first coil branch and the fifth coil branch both include pins exposed outside the insulating base. One end of the first coil branch includes the pin and the other end includes the first connecting pin. One end of the second coil branch includes the second connecting pin and the other end includes the first connecting pin. One end of the fifth coil branch includes the pin and the other end includes the second connecting pin. The initial lead of the first coil is connected to the first connecting pin of the first coil branch and the end lead is connected to the second connecting pin of the second coil branch. The initial lead of the third coil is connected to the first connecting pin of the second coil branch, and the end lead is connected to the second connecting pin of the fifth coil.

[0018] Furthermore, the base with integrated coils includes four coils arranged at intervals, namely the first coil, the second coil, the third coil and the fourth coil. The branch further includes a third coil branch, a fourth coil branch and a sixth coil branch. The first coil branch, the fifth coil branch, the third coil branch and the sixth coil branch all include the pins exposed outside the insulating base. One end of the third coil branch includes the pin and the other end includes the first connecting pin. One end of the fourth coil branch includes the second connecting pin and the other end includes the first connecting pin. One end of the sixth coil branch includes the pin and the other end includes the second connecting pin. The second coil and the fourth coil are arranged opposite to each other and are connected in series. The initial lead of the second coil is connected to the first connecting pin of the third coil branch and the end lead is connected to the second connecting pin of the fourth coil branch. The initial lead of the fourth coil is connected to the first connecting pin of the fourth coil branch and the end lead is connected to the second connecting pin of the sixth coil.

[0019] Furthermore, the insulating base includes a top surface and a bottom surface opposite to the top surface, the coil is horizontally arranged on the top surface, and the connecting pin is exposed on the top surface.

[0020] Furthermore, the base with integrated coil also includes four side surfaces and a through hole passing through the top surface and the bottom surface, the through hole forms an annular inner wall, and an installation area is formed between the annular inner wall and the side surface. The installation area is provided with four sub-installation areas corresponding to the coil, each coil is positioned along the length direction of the side surface, and the coil connection portion is located between two adjacent sub-installation areas.

[0021] Furthermore, the base integrated with the coil also includes an electronic component arranged on the insulating base and electrically connected to the metal circuit, the electronic component is arranged adjacent to the coil connecting portion, the plastic positioning block includes an electronic component connecting portion and a connecting structure connected between the coil connecting portion and the electronic component connecting portion, the connecting pin electrically connected to the electronic component has the connecting surface, the connecting surface of the connecting pin electrically connected to the electronic component is exposed to the electronic component connecting portion, and the top surface of the electronic component connecting portion is flush with the top surface of the second connecting block.

[0022] Furthermore, the top surface of the electronic component connecting part is recessed to form a accommodating cavity, the connecting pin electrically connected to the electronic component is exposed to the bottom surface of the accommodating cavity, the electronic component and the connecting pin are electrically connected in the accommodating cavity, and the top surface of the electronic component connecting part is higher than the top surface of the electronic component along the thickness direction of the coil.

[0023] Furthermore, a connecting portion is formed between the pin and the connecting pin of the branch and between the first connecting pin and the second connecting pin, and the parts of the connecting portion close to the connecting pin, the first connecting pin and the second connecting pin are all bent to form a bent portion, and the connecting portions are all located in the same first horizontal plane. The bent portion of the branch electrically connected to the coil is bent upward from the connecting portion along the thickness direction of the coil, and the connecting surface of the first connecting pin and the connecting surface of the second connecting pin are both higher than the first horizontal plane. The bent portion of the branch electrically connected to the electronic component is bent downward from the connecting portion along the thickness direction of the coil, and the connecting surfaces of the connecting pin electrically connected to the electronic component are all lower than the first horizontal plane, and the top surface of the electronic component is lower than the connecting surface of the second connecting pin.

[0024] Furthermore, the coil includes a main body and a cavity formed in the main body, and the electronic component is located in the cavity of the coil and is offset from the main body of the coil along the thickness direction of the coil.

[0025] The object of the present invention is achieved through the following technical solution 2: a motor, including the above-mentioned base integrated with the coil, an outer shell located above the base integrated with the coil and a movable module accommodated in the outer shell, the movable module including a magnetic element cooperating with the coil.

[0026] Furthermore, the coil is a pushing coil for pushing the movable module to move, a functional coil for preventing the movable module from shaking, or a damping coil for controlling the action of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1FIG. 1 is a perspective schematic diagram of a motor having a base integrated with a coil according to the present invention.

[0028] Figure 2 It is a three-dimensional schematic diagram of a wound coil with a base integrated with the coil according to the present invention.

[0029] Figure 3 This is a perspective view of a base integrated with a coil according to the present invention.

[0030] Figure 4 This is a three-dimensional diagram from another perspective of the base integrated with the coil of the present invention.

[0031] Figure 5 A top view of the base with integrated coil according to the present invention.

[0032] Figure 6 for Figure 3 Partial exploded view of the base with the coil integrated into it.

[0033] Figure 7 for Figure 6 Further partially exploded perspective view of the base with the coil integrated therein.

[0034] Figure 8 for Figure 7 Another perspective exploded view of the base with the coil integrated in it.

[0035] Figure 9 This is a three-dimensional diagram of the metal circuit of the base integrated with the coil according to the present invention.

[0036] Figure 10 for Figure 7 A three-dimensional enlarged view of the inner part of the middle insulating base ring C.

[0037] Figure 11 for Figure 5 A cross-sectional view along the AA direction of the base with the coil integrated therein.

[0038] Figure 12 for Figure 11 A partially cutaway cross-sectional view of the base with the coil integrated into it.

[0039] Figure 13 for Figure 5 Cross-sectional view along direction BB of the base with the coil integrated therein.

[0040] Figure 14 for Figure 13 A partially cutaway enlarged cross-sectional view of the base with the coil integrated therein.

[0041] Description of main component symbols

[0042] Please refer to the following figure numbers for explanation: motor 1000, outer shell 1001, magnetic element 104, lens 103, bracket 106, base 100, coil 10, electronic component 20, insulating base 1, metal circuit 2, plastic positioning block 3, plastic body 4, top surface 11, bottom surface 12, side surface 13, through hole 14, annular inner wall 141, corner 15, first groove 16, protrusion 17, positioning post 18, initial lead 101, final lead 102, body 105, cavity 1035, first coil 1031, second coil 1032, third coil 1033, fourth coil 1034, first electronic component 201, second electronic component 202, first branch 211, second branch 212, third branch 213, fourth branch 214, fifth branch 215, Sixth branch 216, seventh branch 217, eighth branch 218, first coil branch 221b, second coil branch 222c, third coil branch 223b, fourth coil branch 224c, fifth coil branch 225h, sixth coil branch 226h, pin 1a, connecting pin 1b, connecting portion 1c, bending portion 1d, first plastic block 31, second plastic block 32, coil connecting portion 321, first step portion 311, first connecting block 312, second connecting block 313, welding groove 3121, electronic component connecting portion 322, connecting structure 323, accommodating cavity 324, first positioning hole 111, second positioning hole 112, recessed groove 161, second step portion 162, bottom surface 1611, side surface 1612, first connecting pin 11b, second connecting pin 12b. DETAILED DESCRIPTION

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For ordinary technicians in this field, they can understand the specific meaning of the above term in the present invention according to specific circumstances.

[0045] The wound coil 10 (illustrated in this patent as a simplified representation of the coil) in the prior art and the present application is typically a hollow coil formed from a single wire and includes a main body 105 and a cavity 1035 formed within the main body 105. An initial lead 101 at one end of the coil 10 is wound around the innermost and bottommost layers of the coil, then wound upward along the coil from the inside out and from the bottom up. It is then wound outward to form the outer coil and ends at the end of the lead to form a final lead 102. The initial lead 101 is located at the innermost side of the bottommost coil and extends from the bottom side of the coil 10 across the outer coil to be exposed at the outermost side of the bottom side of the coil 10. That is, the initial lead 101 is located at the bottom along the thickness direction of the coil 10 and is a single layer. The final lead 102 is located at the outermost coil and, perpendicular to the winding direction of the coil 10, above the lowest single coil layer. This is also above the initial lead 101. There is a vertical height difference between the initial lead 101 and the final lead 102. The hollow coils described here are pre-wound and then mounted on a device, such as a motor base. Of course, in addition to hollow coils, the wound coil 10 can also be wound on-site based on actual needs, such as directly on the base of a device, such as a motor, to form the coil 10.

[0046] In the prior art, the leads of the coil on the base are all welded to two spaced-apart connecting pins located on the same horizontal plane in the insulating base, and the problem of difference in welding distance of the leads caused by the height difference between the initial lead 101 and the final lead 102 of the wound coil in the vertical direction (i.e., the thickness direction of the coil 10) is not considered. In the present invention, the first connecting pin 11b and the second connecting pin 12b of two different heights in the metal circuit 2 are electrically connected to the initial lead 101 and the final lead 102 in the coil 10 respectively (in this embodiment, the best implementation method of the electrical connection is welding, but other contact-type electrical connections such as clamping, bonding, etc. can also be used). This can reduce the inclination angle and extension length of the initial lead 101 and the final lead 102, thereby effectively improving the reliability of the electrical connection between the two initial leads 101 and the final lead 102 of the coil 10 and the first and second connecting pins 11b, 12b, thereby enhancing the signal transmission effect and avoiding affecting the product and service life. Below, combined with Figures 1 to 14 The base 100 and the motor 1000 having the base 100 of the present invention are introduced.

[0047] The base 100 of the present invention can be applied to various motors, including but not limited to voice coil motors, linear motors, piezoelectric motors, or periscope motors. The present invention uses a voice coil motor (VCM) 1000 as an example. VCM motors are an important component for camera focus and anti-shake. Mobile phone cameras widely use motors to achieve autofocus, which can adjust the position of the lens to produce clear images. The motor 1000 includes an outer shell 1001, a magnetic element 104, a lens 103, a bracket 106 that supports the lens 103, and a base 100 integrated with a coil 10 that interacts with the magnetic element 104. The magnetic element 104, the lens 103, and the bracket 106 that supports the lens 103 are referred to as a movable module. In the present invention, the coil 10 is integrated into the base 100, and the movable module is used to achieve various directional movement, thereby realizing the various functions of the motor 1000.

[0048] Please refer to Figures 3 to 8 , the present invention mainly relates to a base 100 that can be used in the motor 1000 described in the various embodiments above. The base 100 cooperates with the focusing function and anti-shake function of the motor 1000, and is provided with an electronic component 20 with an induction function and a wound coil 10. The coil 10 can cooperate with the corresponding magnetic element 104 to realize focusing drive or anti-shake drive. The base 100 includes an insulating base 1, a metal circuit 2 buried in the insulating base 1, an electronic component 20 electrically connected to the metal circuit 2, and a wound coil 10 electrically connected to the metal circuit 2. The insulating base 1 includes a plastic positioning block 3 molded by one injection molding and a plastic body 4 molded by two injection molding on the plastic positioning block 3 and the metal circuit 2. In this embodiment, the electronic component 20 is a Hall element or an integrated circuit element (IC) including a Hall element.

[0049] Please refer to Figures 3 to 8 The plastic body 4 is injection-molded from a plastic material and includes opposing top and bottom surfaces 11 and 12, four side surfaces 13, a through-hole 14 extending through the top and bottom surfaces 11 and 12, and four corners 15. Through-hole 14 forms an annular inner wall 141. Between annular inner wall 141 and side surfaces 13, a mounting area (unnumbered) is formed for mounting electronic components 20 and coil 10. The mounting area is divided into four sub-mounting areas (unnumbered) corresponding to the four side surfaces 13. Each sub-mounting area can be positioned corresponding to a coil 10 and electrically connected to the metal circuit 2.

[0050] The plastic body 4 has a first groove 16 formed in its top surface 11, corresponding to each coil 10 installed within the sub-mounting area. A raised portion 17 is formed between adjacent first grooves 16 and the annular inner wall 141. The outer walls of the raised portion 17 can align with the sidewalls of the coil 10 to improve the stability of the coil 10's winding. Furthermore, the raised portion 17 enhances the overall strength of the plastic body 4.

[0051] To precisely position each coil 10, the plastic body 4 includes at least two rectangular columnar positioning posts 18 spaced apart along the length of the side surface 13 within the first groove 16. The bottom of the positioning posts 18 is fixed to the plastic body 4, and the top is chamfered to facilitate installation of the coil 10. The top surface of the positioning posts 18 is not vertically higher than the raised portion 17. The cavity 1035 of the coil 10 is sleeved over the positioning posts 18 to achieve precise positioning relative to the plastic body 4. In the preferred embodiment of the present application, three positioning posts 18 are provided, two of which are located at opposite ends of the coil 10 in the winding direction, and the other is located in the middle of the inner region of the coil 10. The positioning post 18 in the middle of the inner region is longer than the other two positioning posts 18, and the middle positioning post 18 is the longest, providing better support for the larger middle portion of the coil 10 and facilitating the stability of the coil 10's positioning.

[0052] Please refer to Figures 7 and 8 The metal circuit 2 includes a plurality of branches 21 arranged at intervals. Some of the branches 21 are electrically connected to the initial lead 101 and the final lead 102 of the coil 10, and other branches 21 are electrically connected to the welding pins (not shown) of the electronic component 20. In this embodiment, each electronic component 20 is provided with four welding pins (not shown), and each electronic component 20 is independently electrically connected to four branches 21. Each coil 10 has an initial lead 101 and a final lead 102. Each coil 10 needs to be electrically connected to two branches 21 respectively. One of the initial leads 101 and one of the final leads 102 of the two coils 10 can be connected in series with a common branch 21, so that every two coils 10 can only be electrically connected to three branches 21.

[0053] In a specific embodiment of the present invention, the base 100 is provided with four coils 10, namely a first coil 1031, a second coil 1032, a third coil 1033, and a fourth coil 1034. The first coil 1031 and the third coil 1033 are arranged in two sub-mounting areas opposite each other and are connected in series. The second coil 1032 and the fourth coil 1034 are arranged in two sub-mounting areas opposite each other and are connected in series. There are two electronic components 20, namely a first electronic component 201 and a second electronic component 202. Based on the requirements for electrical connection between the coils 10 and the electronic components 20 and the corresponding branches 21, in the best embodiment of the present application, the base 100 is provided with at least 14 branches 21, of which four branches: the first branch 211, the second branch 212, the third branch 213, and the fourth branch 214 are used for electrical connection with the first electronic component 201; and four branches: the fifth branch 215, the sixth branch 216, the seventh branch 217, and the eighth branch 218 are used for electrical connection with the second electronic component 202. The six branches: the first coil branch 221b, the second coil branch 222c, the third coil branch 223b, the fourth coil branch 224c, the fifth coil branch 225h, and the sixth coil branch 226h are used to electrically connect to the two coils 10. Specifically, the first coil branch 221b and the second coil branch 222c are used to electrically connect to the first coil 1031; the second coil branch 222c and the fifth coil branch 225h are used to electrically connect to the third coil 1033; the third coil branch 223b and the fourth coil branch 224c are used to electrically connect to the second coil 1032; and the fourth coil branch 224c and the sixth coil branch 226h are used to electrically connect to the fourth coil 1034. The second coil branch 222c is shared by the first coil 1031 and the third coil 1033, and the fourth coil branch 224c is shared by the second coil 1032 and the fourth coil 1034. By setting a common second coil branch 222c or a fourth coil branch 224c in series between a pair of coils 10, the number of branches 21 can be saved as much as possible compared to the arrangement in which each coil 10 is electrically connected to two independent branches 21, which is conducive to reducing costs and miniaturizing the base 100.

[0054] Please refer to Figures 7 to 9One end of each branch 21 is arranged parallel and spaced apart to form pins 1a exposed outside the plastic body 4 of the insulating base 1. The other end of each branch 21 forms connecting pins 1b. Connecting pins 1b are injection molded into the insulating base 1 and exposed on the top surface 11 of the insulating base 1 to electrically connect to the coil 10 and the electronic component 20. The pins 1a of each branch 21 are respectively distributed outside two opposite side surfaces 13 of the plastic body 4 and extend in a vertical direction. A connecting portion 1c is formed between the pins 1a of each branch 21 and the connecting pins 1b. The portion of the connecting portion 1c adjacent to the connecting pin 1b is bent to form a bent portion 1d, which is embedded in the plastic body 4. The connecting portions 1c of all branches 21 are located within the same first horizontal plane (not labeled). The plastic positioning block 3 is injection molded on the periphery of the connecting pin 1b and exposes the connecting surface of the connecting pin 1b. The plastic body 4 forms a positioning hole for accommodating the plastic positioning block 3. The positioning hole includes a first positioning hole 111 and a second positioning hole 112. The top surface of the plastic positioning block 3 is exposed to the plastic body 4.

[0055] The bent portions 1d of the four branches 21 electrically connected to each electronic component 20 are bent downward from the ends of the connecting portion 1c, so that all connecting pins 1b are located within a second horizontal plane (not labeled). The second horizontal plane being lower than the first horizontal plane allows the connection surface of the electronic component 20 electrically connected to the connecting pins 1b to sink, thereby allowing the electronic component 20 to be accommodated within the thickness region of the insulating base 1. Specifically, the electronic component 20 is located within the cavity 1035 of the coil 10 and is offset relative to the main body 105 of the coil 10 along the thickness direction of the coil 10. This prevents the electronic component 20 from being exposed on the top surface of the first groove 16 of the plastic body 4, which could damage the electronic component 20 during the installation of the coil 10 or other components. The connecting pins 1b of the four branches 21 electrically connected to each electronic component 20 are arranged parallel to each other in a rectangular area, facilitating electrical connection with the four connecting pins of the electronic component 20.

[0056] Please refer to Figures 9 to 11The bent portions 1d of the two branches 21 electrically connected to each coil 10 are bent upward from the end of the connecting portion 1c so that the connecting pin 1b is located in other planes higher than the first horizontal plane, and in the best embodiment, the connection surface of the first connecting pin 11b of the connecting pin 1b electrically connected to the initial lead 101 of the coil 10 is located in the third horizontal plane, and the connection surface of the second connecting pin 12b of the connecting pin 1b electrically connected to the end lead 102 of the coil is located in the fourth horizontal plane. The third horizontal plane is lower than the fourth horizontal plane in the vertical direction, and both are higher than the first horizontal plane. In this embodiment, the first coil branch 221b has a first connecting pin 11b, and the second coil branch 222c has a second connecting pin 12b. The first connecting pin 11b of the first coil branch 221b and the second connecting pin 12b of the second coil branch 222c are respectively used to electrically connect to the initial lead 101 and the end lead 102 of the first coil 1031; the second coil branch 222c has a first connecting pin 11b, and the fifth coil branch 225h has a second connecting pin 12b. The first connecting pin 11b of the second coil branch 222c and the second connecting pin 12b of the fifth coil branch 225h are respectively used to electrically connect to the initial lead 101 and the end lead 102 of the third coil 1033. The third coil branch 223b has a first connecting pin 11b, and the fourth coil branch 224c has a second connecting pin 12b. The first connecting pin 11b of the third coil branch 223b and the second connecting pin 12b of the fourth coil branch 224c are respectively used to electrically connect to the initial lead 101 and the final lead 102 of the second coil 1032. The fourth coil branch 224c has a first connecting pin 11b, and the sixth coil branch 226h has a second connecting pin 12b. The first connecting pin 11b of the fourth coil branch 224c and the second connecting pin 12b of the sixth coil branch 226h are respectively used to electrically connect to the initial lead 101 and the final lead 102 of the fourth coil 1034. In this embodiment, the first connecting pin 11b and the second connecting pin 12b are flat-plate structures with horizontal connecting surfaces. However, the first connecting pin 11b and the second connecting pin 12b may also have convex or concave structures, so that their connecting surfaces are curved.

[0057] The connecting pins 1b corresponding to the initial lead 101 and the final lead 102 of each coil 10 are located at opposite ends of the coil 10, with the line connecting the two pins parallel to the length of the side surface 13. The two connecting pins 1b of the initial lead 101 of one coil 10 and the final lead 102 of the other coil 10 are adjacent to each other and spaced apart. They are both located in a coil welding area (not numbered), which is formed between the protrusion 17 and the corner 15 and between the two sub-mounting areas.

[0058] Please refer to Figures 3 to 8 as well as Figures 10 to 14Before the metal circuit 2 is injection molded onto the plastic body 4, plastic positioning blocks 3 are pre-molded around the periphery of all connecting pins 1b through a one-time injection molding process to facilitate precise positioning of the connecting pins 1b and facilitate subsequent electrical connection of the connecting pins 1b with the coils 10 and electronic components 20. In this embodiment, the plastic positioning blocks 3 include two types, namely a first plastic block 31 and a second plastic block 32. The first plastic block 31 is used for injection molding to position the first connecting pins 11b and second connecting pins 12b of two adjacent coils 10, as well as the four connecting pins 1b of the electronic components 20 in adjacent positions. The second plastic block 32 is only used for injection molding to position the first connecting pins 11b and second connecting pins 12b of two adjacent coils 10.

[0059] The first plastic block 31 is provided with a spaced-apart coil connection portion 321. The coil connection portion 321 is provided with a first step 311 to form a first connection block 312 and a second connection block 313. The first step 311 is located between the first connection pin 11b and the second connection pin 12b and extends at a certain angle relative to the length of the side surface 13. The top surface of the first connection block 312 is lower in the vertical direction than the top surface of the second connection block 313. The first and second connection blocks 312, 313 have recessed welding grooves 3121 formed on their top surfaces to accommodate the corresponding first and second connection pins 11b, 12b. The top surfaces of the first and second connection pins 11b, 12b are exposed to the top surfaces of the first and second connection blocks 312, 313, respectively, to achieve electrical connection with the leads of the coil 10. The connection surfaces of the first and second connection pins 11b, 12b are flush with the top surfaces of the first and second connection blocks 312, 313, respectively. Before soldering the first and second connecting pins 11b, 12b to the initial lead 101 and the final lead 102, tin is pre-applied to facilitate soldering and securing them to each other. During soldering, a first step 311 is formed between the first connecting block 312 and the second connecting block 313 covering the first and second connecting pins 11b, 12b. The first step 311 can isolate the tin used during soldering of the first and second connecting pins 11b, 12b, thereby preventing a short circuit after soldering. In other embodiments, the connection surface of the first and second connecting pins 11b, 12b can also be lower than the corresponding first and second connecting blocks 312, 313. Such a lowered connection surface can facilitate the accumulation of tin.

[0060] The second plastic block 32 is provided with a coil connection portion 321 and an electronic component connection portion 322 arranged at intervals, and the two are connected by a connecting structure 323. The electronic component connection portion 322 is recessed downward from the top surface of the second plastic block 32 to form a receiving cavity 324. The top surfaces of the four connecting pins 1b electrically connected to the electronic component 20 are exposed to the bottom surface of the receiving cavity 324 to achieve electrical connection with the soldering pins of the electronic component 20. Gaps (unnumbered) are retained between the four walls of the electronic component 20 and the receiving cavity 324. The height of the electronic component 20 is less than the height of the receiving cavity 324 to prevent the electronic component 20 from being exposed to the top surface of the first plastic block 31 and causing damage to the electronic component 20 during subsequent processing. The top surface of the second connecting block 313 is flush with the top surface of the electronic component connection portion 322.

[0061] Please refer to Figure 3 and Figure 6 The plastic body 4 is formed by a two-stage injection molding process from the first plastic block 31, the second plastic block 32, and the metal circuit 2. The connection portion 1c and the bent portion 1 of the metal circuit 2 are injection-molded inside the plastic body 4, and the pin 1a is exposed outside the plastic body 4. The plastic body 4 forms first positioning holes 111 corresponding to the coil connection portions 321 of the two first plastic blocks 31, and second positioning holes 112 corresponding to the electronic component connection portions 322 of the two second plastic blocks 32. The top surfaces of the second connection blocks 313 and the electronic component connection portions 322 of the first and second plastic blocks 31, 32 are flush with the top surface 11 of the plastic body 4. The coil connection portions 321 of the first and second plastic blocks 31, 32 are positioned in the coil welding area of the plastic body 4, while the electronic component connection portion 322 of the second plastic block 32 is located on the bottom side of the coil 10, with the accommodating cavity 324 exposed in the internal area between the two positioning posts 18 of the coil 10.

[0062] Please refer to Figure 6 、 Figure 7 、 Figures 10 to 14After the plastic body 4 is injection molded onto the metal circuit 2 and the plastic positioning block 3, the coil 10 is positioned on the positioning post 18 in the corresponding first groove 16. At this time, the bottom side of the coil 10 is placed on the bottom surface of the first groove 16 of the plastic body 4 and is fixed with glue to ensure that there is no gap between them. In the prior art, because the initial lead 101 of the coil 10 spans from the inner lead of the coil 10 to the outer lead of the coil 10 and is located alone at the bottom of the coil 10, the initial lead 101 raises the coil 10, and the coil 10 is easily tilted relative to the bottom surface of the first groove 16. The tilted coil 10 will cause unstable positioning, causing the coil 10 to shake after installation, thereby affecting the installation reliability and electrical stability of the coil 10. Therefore, in the embodiment of the present application, a recessed groove 161 is provided between the first groove 16 and the first connecting block 312 of the plastic positioning block 3. A second step 162 is formed between the recessed groove 161 and the first groove 16. The recessed groove 161 includes a bottom surface 1611 and a side surface 1612 connected to the bottom surface 1611. At least a portion of the sidewall of the positioning post 18 is located within the recessed groove 161. The depth of the recessed groove 161 is greater than or equal to the thickness of the initial lead 101 to ensure that the initial lead 101 does not protrude from the recessed groove 161, thereby allowing the coil 10 to rest smoothly on the top surface 11 of the plastic body 4, ensuring the flatness and stability of the coil 10.

[0063] The bottom side of the coil 10 is mounted within the first groove 16 and abuts the bottom surface of the first groove 16. Since the side surface 1612 of the recessed groove 161 is flush with the side wall of the positioning post 18, i.e., the side wall of the positioning post 18 is at least partially located within the recessed groove 161, the innermost lead wire of the coil 10 abuts the side wall of the positioning post 18. Therefore, the initial lead wire 101 is directly led out from the innermost lead wire to the outer lead wire within the recessed groove 161, better ensuring that the recessed groove 16 completely accommodates the initial lead wire 101 and, in turn, ensuring that the bottom side of the coil 10 is more closely aligned with the bottom surface of the first groove 16. The bottom surface 1611 of the recessed groove 161 remains flush with the top surface of the first connecting block 312, allowing the initial lead wire 101 to complete electrical connection with the first connecting pin 11b within the same horizontal plane. The initial lead wire 101 does not need to be bent, ensuring that the initial lead wire 101 is not easily broken after electrical connection. The final lead 102 of the coil 10 is electrically connected directly to the second connecting pin 12b on the top surface of the plastic positioning block 3. Because the first connecting pin 11b and the second connecting pin 12b have a vertical height difference, this balances the height difference between the initial lead 101 and the final lead 102 of the coil 10, shortening the electrical connection distance between the connecting pin 1b and the corresponding lead. This ensures that there are no steps or bent portions between the lead and the connecting pin 1b, thus ensuring that the lead is not easily broken after electrical connection. In other embodiments, the bottom surface 1611 of the recessed groove 161 can be higher than the top surface of the first connecting block 312 along the thickness direction of the coil 10, thereby facilitating the collection and accumulation of tin on the top surface of the first connecting block 312.

[0064] In other embodiments of the present application, the first connection block 312 and the initial lead 101 can be simultaneously disposed within the same recessed groove 161, that is, the recessed groove 161 simultaneously serves to accommodate the initial lead 101 and to sink the first connection block 312 (that is, to cooperate with the sinking of the first connection pin 11b). In this case, the first step portion 311 and the second step portion 162 can be respectively formed on two opposite sides of the recessed groove 161. In other embodiments of the present application, the top surface of the first connection block 312 is not limited to being flush with the bottom surface 1611 of the recessed groove 161, and can also be lower than or higher than the bottom surface 1611. Alternatively, the plastic positioning block 3 is integrally formed with the plastic body 4, so that the insulating base 1 can be formed into the corresponding first connection block 312 and second connection block 313 by a single injection molding process.

[0065] In the present invention, the first connecting pin 11b and the second connecting pin 12b of the two branches 21 electrically connected to the coil 10 form a height difference in the vertical direction, which can effectively improve the electrical connection reliability of the initial lead 101 and the final lead 102 of the coil 10.

[0066] The plastic body 4 defines a recessed groove 161 corresponding to the initial lead 101. This recessed groove 161 accommodates the initial lead 101 and prevents the coil 10 from shaking after being installed on the plastic body 4. The depth of the recessed groove 161 is greater than or equal to the thickness of the initial lead 101. The recessed groove 161 communicates with the outer wall of the positioning post 18, facilitating the initial lead 101's passage from the innermost layer to the outermost coil.

[0067] The present invention provides a total of four coils 10, wherein the first coil 1031 and the third coil 1033 are connected in series via the second coil branch 222c, and the second coil 1032 and the fourth coil 1034 are connected in series via the fourth coil branch 224c, thereby reducing the number of branches 21 and connecting pins 1b, saving space for arranging the branches 21 inside the base.

[0068] Before injection molding the plastic body 4, the present invention pre-moldes a plastic positioning block 3 around the connecting pin 1b. This precisely positions the connecting pin 1b, preventing positioning errors. During soldering, a first step 311 is formed between the first connecting block 312 and the second connecting block 313, which cover the first and second connecting pins 11b, 12b. This first step 311 isolates the solder used for soldering the first and second connecting pins 11b, 12b, thereby preventing a short circuit after soldering.

[0069] The plastic body 4 of the insulating base 1 of the present application is provided with a positioning column 18 for positioning the coil 10. The positioning column 18 is located inside the coil 10. Three positioning columns 18 are provided in each coil 10, and the electronic component 20 is located between two positioning columns 18. This arrangement can save the layout space of the coil 10 and the electronic component 20 as much as possible, and the plastic positioning block 3 is provided with a accommodating cavity 324 for accommodating the electronic component 20. The depth of the accommodating cavity 324 is greater than the thickness of the electronic component 20, which can prevent the coil 10 from touching the electronic component 20 when installing.

[0070] In this embodiment, the coil 10 is horizontally arranged in the first groove 16 of the top surface 11 of the plastic body 4, and the first connecting pin 11b and the second connecting pin 12b are horizontally exposed on the plastic positioning block 3 of the insulating base 1 to be electrically connected to the coil 10. In other embodiments, the position and setting method of the coil 10 can also be changed in various ways. For example, the coil 10 and the plastic positioning block 3 can be vertically arranged in a vertical plane, and the first connecting pin 11b and the second connecting pin 12b are vertically exposed to the plastic positioning block 3 to be electrically connected to the coil 10. For related technologies, please refer to the announced Chinese invention patents CN112994400B, CN112821712B, etc.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0072] The above descriptions are only some embodiments of the present invention, not all embodiments. Any equivalent changes made to the technical solution of the present invention by ordinary technicians in this field after reading the specification of the present invention are covered by the claims of the present invention.

Claims

1. A base with an integrated coil, comprising an insulating base, a metal circuit embedded in the insulating base, and a wound coil fixed to the insulating base and electrically connected to the metal circuit, the coil including an initial lead and a final lead, the final lead extending from a position higher than the initial lead along the thickness direction of the coil in an axial direction, forming a height difference between the initial lead and the final lead along the thickness direction of the coil, the metal circuit including a plurality of branches, characterized in that: Several of the branches include connecting pins arranged on the insulating base, and the connecting pins include a first connecting pin electrically connected to the initial lead and a second connecting pin electrically connected to the final lead. The first connecting pin is lower than the second connecting pin along the thickness direction of the coil, so that the first connecting pin and the second connecting pin also form a height difference along the thickness direction of the coil.

2. The base with integrated coil according to claim 1, characterized in that: The initial lead and the final lead are respectively arranged on two opposite sides of the coil, and the first connecting pin and the second connecting pin are respectively exposed on the insulating base on two opposite sides of the coil.

3. The base with integrated coil according to claim 1, characterized in that: The first connecting pin and the second connecting pin are both provided with connecting surfaces electrically connected to the corresponding initial lead and the final lead. The insulating base is recessed corresponding to the lead-out position of the initial lead to form a recessed groove to accommodate the initial lead. The recessed groove has a bottom surface and a side surface, and the depth of the recessed groove is greater than or equal to the thickness of the initial lead.

4. The base with integrated coil according to claim 3, characterized in that: The bottom surface of the recessed groove is higher than or flush with the connection surface of the first connection pin along the thickness direction of the coil, and the connection surface of the second connection pin is higher than the connection surface of the first connection pin along the thickness direction of the coil.

5. The base with integrated coil according to claim 3, characterized in that: At least two positioning posts are protruded on the insulating base at intervals, and the coil is sleeved outside the at least two positioning posts. The at least two positioning posts are respectively located at two opposite ends of the coil, and at least part of the side wall of the positioning post close to the initial lead is located in the recessed groove.

6. The base with integrated coil according to claim 1, characterized in that: The first connecting pin and the second connecting pin are both provided with a connecting surface electrically connected to the corresponding initial lead and the final lead. The insulating base includes a top surface and a bottom surface opposite to the top surface. The connecting surface of the first connecting pin is lower than the top surface in the thickness direction of the coil.

7. The base with integrated coil according to claim 3, characterized in that: The insulating base includes a plastic positioning block that is injection molded once and a plastic body that is injection molded on the plastic positioning block and the metal circuit through secondary injection molding. The plastic positioning block is injection molded on the periphery of the connecting pin and exposes the connecting surface of the connecting pin. The plastic body forms a positioning hole for accommodating the plastic positioning block, and the top surface of the plastic positioning block is exposed to the plastic body.

8. The base with integrated coil according to claim 7, characterized in that: The base integrated with the coil also includes at least two coils arranged at intervals, the end lead and the initial lead between the two adjacent coils are arranged adjacent to each other, and the second connecting pin and the first connecting pin corresponding to the end lead and the initial lead share a plastic positioning block.

9. The base with integrated coil according to claim 8, characterized in that: The plastic positioning block includes a coil connecting portion, which includes a first connecting block, a second connecting block and a first step portion formed between the first connecting block and the second connecting block. The first connecting block is lower than the second connecting block along the thickness direction of the coil. The connecting surface of the first connecting pin is exposed to the first connecting block, and the connecting surface of the second connecting pin is exposed to the second connecting block. The bottom surface of the recessed groove is higher than or flush with the top surface of the first connecting block along the thickness direction of the coil.

10. The base with integrated coil according to claim 9, characterized in that: The insulating base is correspondingly provided with a first groove for accommodating each of the coils, the bottom surface of the coil is against the bottom surface of the first groove, a second step portion is formed between the bottom surface of the recessed groove and the bottom surface of the first groove, and the top surface of the second connecting block is flush with the bottom surface of the first groove.

11. The base with integrated coil according to claim 10, characterized in that: At least two of the coils include a first coil and a third coil that are arranged opposite to each other and connected in series. The branches include at least a first coil branch, a second coil branch, and a fifth coil branch. The first coil branch and the fifth coil branch both include pins exposed outside the insulating base. One end of the first coil branch includes the pin and the other end includes the first connecting pin. One end of the second coil branch includes the second connecting pin and the other end includes the first connecting pin. One end of the fifth coil branch includes the pin and the other end includes the second connecting pin. The initial lead of the first coil is connected to the first connecting pin of the first coil branch, and the end lead is connected to the second connecting pin of the second coil branch. The initial lead of the third coil is connected to the first connecting pin of the second coil branch, and the end lead is connected to the second connecting pin of the fifth coil.

12. The base with integrated coil according to claim 11, characterized in that: The base with integrated coils includes four coils arranged at intervals, namely the first coil, the second coil, the third coil, and the fourth coil. The branches also include a third coil branch, a fourth coil branch, and a sixth coil branch. The first coil branch, the fifth coil branch, the third coil branch, and the sixth coil branch all include pins exposed outside the insulating base. One end of the third coil branch includes the pin and the other end includes the first connecting pin. One end of the fourth coil branch includes the second connecting pin and the other end includes the first connecting pin. One end of the sixth coil branch includes the pin and the other end includes the second connecting pin. The second coil and the fourth coil are arranged opposite each other and are connected in series. The initial lead of the second coil is connected to the first connecting pin of the third coil branch, and the final lead is connected to the second connecting pin of the fourth coil branch. The initial lead of the fourth coil is connected to the first connecting pin of the fourth coil branch, and the final lead is connected to the second connecting pin of the sixth coil.

13. The base with integrated coil according to claim 12, characterized in that: The insulating base includes a top surface and a bottom surface opposite to the top surface. The coil is horizontally arranged on the top surface, and the connecting pins are exposed on the top surface.

14. The base with integrated coil according to claim 13, characterized in that: The base with integrated coil also includes four side surfaces and a through hole passing through the top surface and the bottom surface, the through hole forms an annular inner wall, and an installation area is formed between the annular inner wall and the side surface. The installation area is provided with four sub-installation areas corresponding to the coil, each coil is positioned along the length direction of the side surface, and the coil connection portion is located between two adjacent sub-installation areas.

15. The base with integrated coil according to claim 11, characterized in that: The base with an integrated coil also includes an electronic component arranged on the insulating base and electrically connected to the metal circuit, the electronic component is arranged adjacent to the coil connecting portion, the plastic positioning block includes an electronic component connecting portion and a connecting structure connected between the coil connecting portion and the electronic component connecting portion, the connecting pin electrically connected to the electronic component has the connecting surface, the connecting surface of the connecting pin electrically connected to the electronic component is exposed to the electronic component connecting portion, and the top surface of the electronic component connecting portion is flush with the top surface of the second connecting block.

16. The base with integrated coil according to claim 15, characterized in that: The top surface of the electronic component connecting portion is recessed to form a receiving cavity, and the connecting pin electrically connected to the electronic component is exposed to the bottom surface of the receiving cavity. The electronic component and the connecting pin are electrically connected in the receiving cavity, and the top surface of the electronic component connecting portion is higher than the top surface of the electronic component along the thickness direction of the coil.

17. The base with integrated coil according to claim 16, characterized in that: A connecting portion is formed between the pin and the connecting pin of the branch and between the first connecting pin and the second connecting pin. The parts of the connecting portion close to the connecting pin, the first connecting pin and the second connecting pin are bent to form a bent portion. The connecting portions are all located in the same first horizontal plane. The bent portion of the branch electrically connected to the coil is bent upward from the connecting portion along the thickness direction of the coil. The connecting surface of the first connecting pin and the connecting surface of the second connecting pin are both higher than the first horizontal plane. The bent portion of the branch electrically connected to the electronic component is bent downward from the connecting portion along the thickness direction of the coil. The connecting surfaces of the connecting pins electrically connected to the electronic component are all lower than the first horizontal plane, and the top surface of the electronic component is lower than the connecting surface of the second connecting pin.

18. The base with integrated coil according to claim 16, characterized in that: The coil includes a main body and a cavity formed in the main body. The electronic component is located in the cavity of the coil and is offset from the main body of the coil along a thickness direction of the coil.

19. A motor, characterized in that: It comprises a base with integrated coil as described in any one of claims 1 to 18, an outer shell located above the base with integrated coil, and a movable module accommodated in the outer shell, wherein the movable module includes a magnetic element cooperating with the coil.

20. The motor according to claim 19, wherein: The coil is a pushing coil for pushing the movable module to move, a functional coil for preventing the movable module from shaking, or a damping coil for controlling the action of the motor.

Images