Voice coil motor bottom shell and production method thereof

Abstract

The invention provides a voice coil motor bottom shell and a production method thereof, and relates to the technical field of voice coil motors, the voice coil motor bottom shell comprises a shell, a coil and a terminal; the shell comprises a first injection molding part and a second injection molding part, the first injection molding part is formed in first injection molding, the second injection molding part is formed in second injection molding, the first injection molding part forms a first side wall of the shell, the second injection molding part forms a bottom wall, a second side wall and a third side wall of the shell, and a containing groove is formed in the side face, close to the second side wall, of the first side wall; the coil is accommodated in the accommodating groove; the terminal comprises a main body section and a connecting section formed by bending from the main body section to one side, the main body section is pre-buried in the bottom wall, the connecting section is pre-buried in the first side wall and partially exposed to the accommodating groove, and the exposed part of the connecting section is welded with the coil. The coil of the voice coil motor bottom shell does not need to lead out an overlong lead-out wire, so that frequent manual wire arrangement operation is avoided, and the production efficiency of the bottom shell is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of voice coil motors, and in particular to a voice coil motor bottom shell and a production method thereof. Background Art

[0002] A voice coil motor is a device that converts electrical energy into mechanical energy. It is widely used in various occasions that require high-precision linear motion, such as camera modules, autofocus systems, etc. Its working principle is that an energized coil placed in a uniform air gap magnetic field will generate electromagnetic force, which uses the electromagnetic force to drive the load to move in a straight line.

[0003] In current voice coil motors, the coil is usually installed on the inner side of the bottom shell. This means that when the coil is installed and then welded to the terminal, the lead wire of the coil needs to be wound from the inner side of the bottom shell to the outer side of the bottom shell to be welded to the outer terminal. This will cause the lead wire to extend too long and easily bend, resulting in the need for frequent manual adjustment of the lead wire, which in turn affects the production efficiency of the bottom shell. Summary of the invention

[0004] The problem solved by the invention is: how to improve the production efficiency of the bottom shell of the voice coil motor.

[0005] In order to solve the above problems, the present invention provides a voice coil motor bottom shell and a production method thereof.

[0006] In the first aspect, the present invention provides a voice coil motor bottom shell, including a shell, a coil and a terminal; the shell includes a first injection molding part and a second injection molding part, the first injection molding part is molded in the first injection molding, and the second injection molding part is molded in the second injection molding, the first injection molding part constitutes the first side wall of the shell, the second injection molding part constitutes the bottom wall, the second side wall and the third side wall of the shell, the first side wall, the second side wall and the third side wall are respectively vertically arranged on the bottom wall, and the first side wall is arranged opposite to the second side wall, and the side of the first side wall close to the second side wall is provided with a receiving groove; the coil is received in the receiving groove; the terminal includes a main body section and a connecting section bent to one side from the main body section, the main body section is pre-buried in the bottom wall, the connecting section is pre-buried in the first side wall and partially exposed to the receiving groove, and the exposed part of the connecting section is welded to the coil.

[0007] The beneficial effect of the voice coil motor bottom shell of the present invention is: by designing the shell into a first injection molding part and a second injection molding part, the first injection molding part is molded in the first injection molding, and the second injection molding part is molded in the second injection molding, and the first injection molding part constitutes the first side wall of the shell, and the second injection molding part constitutes the bottom wall, the second side wall and the third side wall of the shell, that is to say, the first side wall and the second side wall of the shell are in different injection molding processes, so that when the welding gun extends to the inner side surface of the first side wall, it can be directly inserted into the inner side surface of the first side wall without being hindered by the second side wall. The welding operation is performed, and further, by accommodating the coil in the accommodating groove, the main body section of the terminal is embedded in the bottom wall, the connecting section of the terminal is embedded in the first side wall and partially exposed to the accommodating groove, and the exposed part of the connecting section is welded to the coil, so that the welding position of the terminal and the coil is in the accommodating groove, that is, the welding position is located on the inner side surface of the first side wall, thereby realizing the welding of the terminal and the coil at the inner side surface of the first side wall, so that the coil does not need to lead out too long lead wires, avoiding frequent manual wire management operations, which is beneficial to improving the production efficiency of the bottom shell.

[0008] Optionally, the accommodating groove includes a groove body and a lead groove communicating with the groove body; The coil comprises a coil body and a lead wire extending from the coil body, the coil body is arranged in the slot body, and the lead wire is arranged in the lead slot; The connecting section is exposed to the lead groove and is welded to the lead wire.

[0009] Optionally, two guide grooves are provided, and the two guide grooves are respectively located on two sides of the groove body; There are two lead wires, and the two lead wires extend from two sides of the coil body respectively, and the two lead wires are respectively arranged in the two lead wire grooves; The terminal comprises a positive terminal and a negative terminal, and the connecting sections of the positive terminal and the negative terminal are respectively welded to the lead wires in the two lead grooves.

[0010] Optionally, a portion of the interior of the accommodating groove excluding the coil and the connecting section is provided with glue.

[0011] In a second aspect, the present invention provides a method for producing a voice coil motor bottom shell, which is used to manufacture the voice coil motor bottom shell as described above. The method for producing the voice coil motor bottom shell comprises: Performing a first injection molding on the connecting section of the terminal to form a first injection-molded portion on the connecting section; Installing the coil in the receiving groove of the first injection molding part; Welding the lead wire of the coil to the connecting section; A second injection molding is performed on the main body section of the terminal to form a second injection-molded part.

[0012] The beneficial effect of the production method of the voice coil motor bottom shell of the present invention is: since the first injection molding is before the coil welding process, and the second injection molding is after the coil welding process, the second injection molding part of the shell does not exist during welding, that is, there is no second side wall, and the welding operation of the welding gun on the inner side of the first side wall is not hindered, so that the coil can be directly welded with the lead wire on the inner side of the first side wall, without leading out too long lead wires to go around the outer side of the first side wall for welding, thus avoiding frequent manual wire management operations and improving the production efficiency of the bottom shell.

[0013] Optionally, the step of installing the coil in the receiving groove of the first injection molding part includes: Applying a first glue on the bottom surface of the receiving groove; Put the coil into the containing groove and bond it with the first glue; The first glue is cured to fix the coil in the receiving groove.

[0014] Optionally, the coil is placed in the receiving groove and bonded with the first glue, and a placement machine is used to place the coil in the receiving groove. The placement machine includes a vacuum suction nozzle, and a suction port is provided at the lower end of the vacuum suction nozzle. The cross-section of the suction port is adapted to the cross-sectional shape of the coil body of the coil.

[0015] Optionally, after welding the lead wire of the coil to the connecting section and before performing a second injection molding on the main section of the terminal to form a second injection-molded portion, the method further includes: Applying a second glue to the welding position of the lead wire and the middle part of the coil body of the coil; The second glue is cured.

[0016] Optionally, in the production method of the voice coil motor bottom shell, the coil is transported through a coil carrier tape, and the coil carrier tape includes a carrier tape and a cover tape. The upper side of the carrier tape is provided with a first accommodating groove and a second accommodating groove connected to the first accommodating groove, the first accommodating groove is used to accommodate the coil body of the coil, and the second accommodating groove is used to accommodate the lead wire.

[0017] Optionally, a gap is provided between the coil body and an inner wall of the first accommodating groove, and a gap is provided between the lead wire and an inner wall of the second accommodating groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a bottom shell of a voice coil motor according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the exploded structure of the bottom shell of the voice coil motor according to an embodiment of the present invention; Figure 3 It is a schematic diagram of pre-embedding the main body section of the terminal in the second injection molding part according to an embodiment of the present invention; Figure 4 This is a schematic diagram of pre-embedding the connecting section of the terminal in the first injection molded part according to an embodiment of the present invention; Figure 5 This is a schematic structural diagram of a first injection molding portion of a bottom shell of a voice coil motor according to an embodiment of the present invention; Figure 6 Schematic diagram of the process of producing a voice coil motor bottom shell according to an embodiment of the present invention.

[0019] Description of reference numerals: 1. Shell; 11. First injection molding part; 111. First side wall; 112. Accommodating groove; 1121. Groove body; 1122. Lead groove; 12. Second injection molding part; 121. Bottom wall; 122. Second side wall; 123. Third side wall; 2. Coil; 21. Coil body; 22. Lead wire; 221. Soldering point; 3. Terminal; 31. Main section; 32. Connecting section; 33. Positive terminal; 34. Negative terminal; 4. Second glue. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0021] The Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the X axis in the drawings represents the horizontal direction, and is designated as the front and back position, and the positive direction of the X axis represents the front side, and the reverse direction of the X axis represents the back side; the Y axis in the drawings represents the left and right position, and the positive direction of the Y axis represents the left side, and the reverse direction of the Y axis represents the right side. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0023] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0024] In the related art, the bottom shell of the voice coil motor usually includes a shell, a coil and a terminal, and the shell includes a bottom wall and multiple side walls connected to the bottom wall. The bottom wall and the multiple side walls together enclose an installation cavity for the installation of other structures of the voice coil motor, but the coil is usually installed in one of the two oppositely arranged side walls and is located on the inner side of the side wall. In this way, because the bottom shell is formed by one-time injection molding, when the coil is installed, the side wall and the side wall opposite to it exist at the same time. Due to the obstruction of the opposite side wall, the welding gun is difficult to extend to the inner side of the side wall to perform welding operations on the coil, resulting in the need to pull the lead wire of the coil from the inner side of the side wall to the outer side of the side wall in order to weld the coil to the terminal, which will cause the lead wire extending from the coil to be too long and easy to bend, resulting in the need for manual frequent sorting of the lead wire, thereby affecting the production efficiency of the bottom shell.

[0025] In view of the problems existing in the above related technologies, the present invention provides a voice coil motor bottom shell and a production method thereof to improve the production efficiency of the voice coil motor bottom shell.

[0026] like Figure 1 , Figure 2 and Figure 5As shown, a voice coil motor bottom shell provided by an embodiment of the present invention includes a shell 1, a coil 2 and a terminal 3; the shell 1 includes a first injection molding part 11 and a second injection molding part 12, the first injection molding part 11 is molded in the first injection molding, and the second injection molding part 12 is molded in the second injection molding, the first injection molding part 11 constitutes a first side wall 111 of the shell 1, and the second injection molding part 12 constitutes a bottom wall 121, a second side wall 122 and a third side wall 123 of the shell 1, and the first side wall 111, the second side wall 122 and the third side wall 123 are respectively vertically arranged at The bottom wall 121, and the first side wall 111 and the second side wall 122 are arranged opposite to each other, and a accommodating groove 112 is provided on the side of the first side wall 111 close to the second side wall 122; the coil 2 is accommodated in the accommodating groove 112; the terminal 3 includes a main body section 31 and a connecting section 32 bent to one side from the main body section 31, the main body section 31 is pre-buried in the bottom wall 121, the connecting section 32 is pre-buried in the first side wall 111 and partially exposed to the accommodating groove 112, and the exposed part of the connecting section 32 is welded to the coil 2.

[0027] It should be noted that the first side wall 111 and the second side wall 122 are arranged opposite to each other, which means that in the length direction of the housing 1 (i.e. Figure 1 The first side wall 111 and the second side wall 122 are arranged opposite to each other in the Z-axis direction. It should also be noted that the main body section 31 is embedded in the bottom wall 121, which means that part of the main body section 31 is wrapped in the bottom wall 121 (refer to Figure 3 ), when the second injection molded portion 12 is obtained by injection molding on the main section 31, the main section 31 can be pre-buried in the bottom wall 121, and the connecting section 32 can be pre-buried in the first side wall 111, which means that part of the connecting section 32 is wrapped in the first side wall 111 (refer to Figure 4 ), when injection molding is performed on the connecting section 32 to obtain the first injection-molded portion 11, the connecting section 32 can be pre-buried in the first side wall 111.

[0028] In this embodiment, the housing 1 is designed to be a first injection molding part 11 and a second injection molding part 12, the first injection molding part 11 is molded in the first injection molding, the second injection molding part 12 is molded in the second injection molding, and the first injection molding part 11 constitutes the first side wall 111 of the housing 1, and the second injection molding part 12 constitutes the bottom wall 121, the second side wall 122 and the third side wall 123 of the housing 1. That is to say, the first side wall 111 and the second side wall 122 of the housing 1 are in different injection molding processes, so that when the welding gun extends to the inner side surface of the first side wall 111, it can be directly welded on the inner side surface of the first side wall 111 without being hindered by the second side wall 122. Operation, and further, by accommodating the coil 2 in the accommodating groove 112, the main section 31 of the terminal 3 is embedded in the bottom wall 121, the connecting section 32 of the terminal 3 is embedded in the first side wall 111 and partially exposed to the accommodating groove 112, and the exposed part of the connecting section 32 is welded to the coil 2, so that the welding position of the terminal 3 and the coil 2 is in the accommodating groove 112, that is, the welding position is located on the inner side surface of the first side wall 111, thereby realizing the welding of the terminal 3 and the coil 2 on the inner side surface of the first side wall 111, so that the coil 2 does not need to lead out an excessively long lead wire 22, thereby avoiding frequent manual wire management operations, which is beneficial to improving the production efficiency of the bottom shell.

[0029] Alternatively, if Figure 5 As shown, the receiving groove 112 includes a groove body 1121 and a lead groove 1122 connected to the groove body 1121; Figure 2 As shown, the coil 2 includes a coil body 21 and a lead wire 22 extending from the coil body 21, the coil body 21 is arranged in the slot body 1121, and the lead wire 22 is arranged in the lead slot 1122; Figure 2 As shown, the connecting section 32 is exposed to the lead groove 1122 and welded to the lead wire 22 (the welding position is shown in FIG. Figure 2 Solder joint 221 as shown).

[0030] In this optional embodiment, since the coil 2 includes a coil body 21 and a lead wire 22 extending from the coil body 21, by designing the accommodating groove 112 as a groove body 1121 and a lead groove 1122 connected to the groove body 1121, the accommodating groove 112 can be adapted to the shape of the coil 2, thereby facilitating the installation of the coil 2.

[0031] Alternatively, if Figure 5 As shown, there are two lead grooves 1122, and the two lead grooves 1122 are respectively located on both sides of the groove body 1121; Figure 4 As shown, there are two lead wires 22, and the two lead wires 22 extend from both sides of the coil body 21, and the two lead wires 22 are respectively arranged in the two lead wire grooves 1122; Figure 4 As shown, the terminal 3 includes a positive terminal 33 and a negative terminal 34 , and the connecting sections 32 of the positive terminal 33 and the negative terminal 34 are respectively welded to the lead wires 22 in the two lead grooves 1122 .

[0032] Specifically, the main section 31 of the positive terminal 33 and the main section 31 of the negative terminal 34 can be used to respectively connect the positive and negative poles of the driving power supply, so that the driving power supply can supply power to the coil 2 through the positive terminal 33 and the negative terminal 34.

[0033] In this optional embodiment, the two lead wires 22 led out from both sides of the coil body 21 correspond to the starting wire and the tail wire of the coil body 21, and by arranging the two lead wires 22 in the two lead wire grooves 1122 respectively and welding them to the positive terminal 33 and the negative terminal 34, it is achieved that the welding positions of the starting wire and the tail wire of the coil body 21 are simultaneously located on the inner side surface of the first side wall 111, that is, the starting wire and the tail wire do not need to be led out for too long a length, which is conducive to eliminating manual wire management to a greater extent.

[0034] Alternatively, if Figure 4 As shown, the interior of the accommodating groove 112 excluding the coil 2 and the connecting section 32 is provided with adhesive.

[0035] Specifically, the adhesive may include a first adhesive located between the coil 2 and the bottom surface of the accommodating groove 112 and a second adhesive 4 located at the welding position of the lead wire 22 and the middle of the coil body 21 .

[0036] In this optional embodiment, glue is provided in the portion inside the accommodating groove 112 except for the coil 2 and the connecting section 32, that is, glue is provided around the coil 2 and the connecting section 32. This not only improves the stability of the installation of the coil 2 in the accommodating groove 112, but also prevents the welding point between the lead wire 22 and the connecting section 32 from being disconnected.

[0037] like Figure 6 As shown, a method for producing a voice coil motor bottom shell provided by an embodiment of the present invention is used to manufacture the voice coil motor bottom shell as described above. The method for producing the voice coil motor bottom shell comprises: Step S10 : performing a first injection molding on the connecting section 32 of the terminal 3 to form a first injection-molded portion 11 on the connecting section 32 .

[0038] Step S20 : ​​installing the coil 2 in the receiving groove 112 of the first injection molding part 11 .

[0039] Step S30 : welding the lead wire 22 of the coil 2 to the connecting section 32 .

[0040] Step S80 : performing a second injection molding on the main body section 31 of the terminal 3 to form a second injection-molded portion 12 .

[0041] Wherein, step S10 can be performed in an injection molding machine. Specifically, the first injection molding includes: firstly placing the connecting section 32 into a first mold of the injection molding machine, then injecting molten resin material, then solidifying the resin material, and finally demolding.

[0042] Furthermore, step S30 can be completed by using a solder ball welding robot to improve welding efficiency.

[0043] Furthermore, step S80 can also be performed in an injection molding machine. Specifically, the second injection molding includes: first placing the main body segment 31 into a second mold of the injection molding machine, then injecting molten resin material, then solidifying the resin material, and finally demolding.

[0044] In this embodiment, since the first injection molding is before the coil welding process and the second injection molding is after the coil welding process, the second injection molding part 12 of the shell 1 does not exist during welding, that is, there is no second side wall 122, and the welding operation of the welding gun on the inner side of the first side wall 111 is not hindered, so that the coil 2 can be directly welded with the lead wire 22 on the inner side of the first side wall 111, without leading out too long lead wire 22 to go around the outer side of the first side wall 111 for welding, thereby avoiding frequent manual wire management operations and improving the production efficiency of the bottom shell.

[0045] Alternatively, if Figure 6 As shown, the step of installing the coil 2 in the receiving groove 112 of the first injection molding part 11 includes: Step S21 : applying a first glue on the bottom surface of the receiving groove 112 .

[0046] Step S22: placing the coil 2 into the containing groove 112 and bonding it with the first glue.

[0047] Step S23 : curing the first glue to fix the coil 2 in the receiving groove 112 .

[0048] Among them, step S21 can be completed using a dispensing robot to improve the dispensing efficiency.

[0049] Furthermore, the curing process in step S23 may be performed by UV (ultraviolet) curing, which has the advantage of rapid curing and is beneficial to improving production efficiency.

[0050] In this optional embodiment, the coil 2 is first placed in the receiving groove 112 filled with glue, and then the glue is cured to achieve the installation of the coil 2 in the receiving groove 112. The cured glue can improve the connection strength between the coil 2 and the bottom surface of the receiving groove 112, thereby improving the installation stability of the coil 2 in the receiving groove 112.

[0051] Optionally, the coil 2 is placed in the receiving groove 112 and bonded with the first glue, and a placement machine is used to place the coil 2 in the receiving groove 112. The placement machine includes a vacuum suction nozzle, and a suction port is provided at the lower end of the vacuum suction nozzle. The cross-section of the suction port is adapted to the cross-sectional shape of the coil body 21 of the coil 2.

[0052] Specifically, the cross section of the coil body 21 may be annular, and accordingly, the cross section of the adsorption port may also be annular, so that the cross section of the adsorption port is adapted to the shape of the cross section of the coil body 21 .

[0053] In this optional embodiment, the coil 2 is placed using a placement machine, so that the installation efficiency of the coil 2 can be improved; and, by designing the suction port of the vacuum suction nozzle of the placement machine to be compatible with the cross-sectional shape of the coil body 21, a contour design of the vacuum suction nozzle is achieved, and the suction port is more compatible with the coil body 21, which can improve the suction effect of the vacuum suction nozzle on the coil body 21, thereby facilitating the improvement of the installation accuracy of the coil 2 in the receiving groove 112.

[0054] Alternatively, if Figure 6 As shown, after welding the lead wire 22 of the coil 2 to the connecting section 32, and before performing a second injection molding on the main section 31 of the terminal 3 to form the second injection molding portion 12, the method further includes: Step S40 : applying a second glue 4 to the welding position of the lead-out wire 22 and the middle part of the coil body 21 of the coil 2 .

[0055] Step S50: curing the second glue 4.

[0056] Among them, step S40 can be completed using a dispensing robot to improve the dispensing efficiency.

[0057] Furthermore, the curing process in step S50 may be performed by UV (ultraviolet) curing, which has the advantage of rapid curing and is beneficial to improving production efficiency.

[0058] Furthermore, after the second glue 4 is cured, the second injection molding is performed on the main section 31 of the terminal 3 to form the second injection molding part 12, and the following steps may also be included: step S60: bending the terminal 3 so that the connecting section 32 is bent toward one side relative to the main section 31; step S70: performing an appearance inspection on the semi-finished product obtained in step S60. Furthermore, step S60 may be completed by a bending robot to improve the bending efficiency. Furthermore, the appearance inspection in step S70 may be completed by a microscope or a camera, and the appearance inspection may be a quality inspection of gluing, welding, etc. By performing an appearance inspection on the semi-finished product, the yield rate of the bottom shell may be ensured.

[0059] In this optional embodiment, by applying and curing the second glue 4 at the welding point of the lead wire 22 and the middle part of the coil body 21, it is possible to not only improve the stability of the installation of the coil 2 in the receiving groove 112, but also prevent the welding point of the lead wire 22 and the connecting section 32 from being disconnected.

[0060] Optionally, in the production method of the voice coil motor bottom shell, the coil 2 is transported through a coil carrier tape, and the coil carrier tape includes a carrier tape and a cover tape. The upper side of the carrier tape is provided with a first accommodating groove and a second accommodating groove connected to the first accommodating groove, the first accommodating groove is used to accommodate the coil body 21 of the coil 2, and the second accommodating groove is used to accommodate the lead wire 22.

[0061] In this optional embodiment, the coil 2 is transported using a coil carrier, which is more conducive to protecting the coil 2 and preventing the coil 2 from being damaged compared to manual transportation; and further, by designing a first accommodating groove and a second accommodating groove on the upper side of the carrier to correspond to the coil body 21 and the lead wire 22 of the coil 2, the shape of the accommodating groove is adapted to the coil 2, thereby better protecting the coil 2 and more effectively preventing the coil body 21 and the lead wire 22 from being accidentally bent.

[0062] Optionally, a gap is provided between the coil body 21 and the inner wall of the first receiving groove, and a gap is provided between the lead wire 22 and the inner wall of the second receiving groove.

[0063] Specifically, the cross-section of the coil body 21 can be annular, and accordingly, the cross-sectional shape of the first accommodating groove can be a rectangle slightly larger than the outer contour size of the coil body 21; the lead wire 22 can be a straight line, and accordingly, the second accommodating groove can be a rectangle slightly larger than the outer contour size of the lead wire 22.

[0064] In this optional embodiment, a gap is provided between the coil body 21 and the inner wall of the first receiving groove, and a gap is provided between the lead wire 22 and the inner wall of the second receiving groove. In this way, the coil body 21 and the lead wire 22 can be easily inserted into the corresponding receiving groove, avoiding hard contact between the coil 2 and the inner wall of the receiving groove, which helps to prevent the coil 2 from being damaged during the placement of the receiving groove.

[0065] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A voice coil motor bottom shell, characterized in that: The invention comprises a housing (1), a coil (2) and a terminal (3); the housing (1) comprises a first injection-molded part (11) and a second injection-molded part (12); the first injection-molded part (11) is molded in a first injection molding, and the second injection-molded part (12) is molded in a second injection molding; the first injection-molded part (11) constitutes a first side wall (111) of the housing (1); the second injection-molded part (12) constitutes a bottom wall (121), a second side wall (122) and a third side wall (123) of the housing (1); the first side wall (111), the second side wall (122) and the third side wall (123) are respectively vertically arranged on the bottom wall (121); The first side wall (111) and the second side wall (122) are arranged opposite to each other, and a receiving groove (112) is provided on a side surface of the first side wall (111) close to the second side wall (122); the coil (2) is received in the receiving groove (112); the terminal (3) comprises a main body section (31) and a connecting section (32) formed by bending the main body section (31) to one side, the main body section (31) being pre-buried in the bottom wall (121), the connecting section (32) being pre-buried in the first side wall (111) and partially exposed to the receiving groove (112), and the exposed portion of the connecting section (32) being welded to the coil (2).

2. The voice coil motor bottom shell according to claim 1, characterized in that: The accommodating groove (112) comprises a groove body (1121) and a lead groove (1122) connected to the groove body (1121); The coil (2) comprises a coil body (21) and a lead wire (22) extending from the coil body (21); the coil body (21) is arranged in the slot body (1121), and the lead wire (22) is arranged in the lead wire slot (1122); The connecting section (32) is exposed to the lead wire groove (1122) and is welded to the lead wire (22).

3. The voice coil motor bottom shell according to claim 2, characterized in that: Two wire guide grooves (1122) are provided, and the two wire guide grooves (1122) are respectively located on two sides of the groove body (1121); Two lead wires (22) are provided, and the two lead wires (22) extend from two sides of the coil body (21) respectively, and the two lead wires (22) are respectively and correspondingly arranged in the two lead wire grooves (1122); The terminal (3) comprises a positive terminal (33) and a negative terminal (34), and the connecting sections (32) of the positive terminal (33) and the negative terminal (34) are respectively welded to the lead wires (22) in the two lead wire grooves (1122).

4. The voice coil motor bottom shell according to claim 1, characterized in that: The portion inside the accommodating groove (112) excluding the coil (2) and the connecting section (32) is provided with adhesive.

5. A method for producing a voice coil motor bottom shell, used for manufacturing the voice coil motor bottom shell as claimed in any one of claims 1 to 4, characterized in that: The production method of the voice coil motor bottom shell comprises: Performing a first injection molding on the connecting section (32) of the terminal (3) to form a first injection molded portion (11) on the connecting section (32); Installing the coil (2) in the receiving groove (112) of the first injection molding part (11); Welding the lead wire (22) of the coil (2) to the connecting section (32); A second injection molding is performed on the main body section (31) of the terminal (3) to form a second injection molded portion (12).

6. The method for producing a bottom shell of a voice coil motor according to claim 5, characterized in that: The step of installing the coil (2) in the receiving groove (112) of the first injection molding part (11) comprises: Applying a first glue on the bottom surface of the receiving groove (112); Placing the coil (2) into the containing groove (112) and bonding it with the first glue; The first glue is cured so that the coil (2) is fixed in the receiving groove (112).

7. The method for producing a bottom shell of a voice coil motor according to claim 6, characterized in that: The coil (2) is placed in the receiving groove (112) and bonded with the first glue, and a placement machine is used to place the coil (2) in the receiving groove (112), wherein the placement machine comprises a vacuum suction nozzle, and a suction port is provided at the lower end of the vacuum suction nozzle, and the cross-section of the suction port is adapted to the cross-sectional shape of the coil body (21) of the coil (2).

8. The method for producing a bottom shell of a voice coil motor according to claim 5, characterized in that: After welding the lead wire (22) of the coil (2) to the connecting section (32), and before performing a second injection molding on the main section (31) of the terminal (3) to form a second injection molded portion (12), the method further comprises: Applying a second glue (4) to the welding point of the lead wire (22) and the middle part of the coil body (21) of the coil (2); The second glue (4) is cured.

9. The method for producing a bottom shell of a voice coil motor according to claim 5, characterized in that: In the production method of the voice coil motor bottom shell, the coil (2) is transported by a coil carrier tape, the coil carrier tape comprises a carrier tape and a cover tape, the upper side of the carrier tape is provided with a first receiving groove and a second receiving groove connected to the first receiving groove, the first receiving groove is used to receive the coil body (21) of the coil (2), and the second receiving groove is used to receive the lead wire (22).

10. The method for producing a bottom shell of a voice coil motor according to claim 9, characterized in that: A gap is provided between the coil body (21) and the inner wall of the first containing groove, and a gap is provided between the lead wire (22) and the inner wall of the second containing groove.

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