Voice coil motor device, lens module and electronic device

Abstract

The present application provides a voice coil motor device, including a fixed component and a movable component that carries a lens. The movable component is accommodated in the fixed component; the fixed component includes a shell and a base, the shell includes an upper surface, a first side wall and a first receiving space; the first receiving space is surrounded by the upper surface and the first side wall, the upper surface is provided with a first circular hole, the base is provided with a second circular hole, and the centers of the first circular hole and the second circular hole are on the optical axis; the movable component is placed in the first receiving space, and the lens carried on it is clamped at the first circular hole; one end of the movable component is mounted at the second circular hole of the base; the first side wall of the shell is provided with a plurality of positioning holes, and the base is correspondingly provided with a plurality of positioning posts, and the positioning posts are embedded in the positioning holes. The voice coil motor device has high assembly precision and is not easy to separate. The present application also provides a lens module using the voice coil motor device and an electronic device using the lens module.

Description

Technical Field

[0001] The present application relates to the field of electronic and optical devices, and in particular to a voice coil motor device, a lens module and an electronic device. Background Art

[0002] As people's requirements for mobile phone photography capabilities become higher and higher, the pixels of mobile phone cameras are getting larger and larger, the size of mobile phone lens modules is also getting larger and larger, and the precision requirements for the combination of lens module components are also getting higher and higher. The voice coil motor device on the lens module often includes a movable component for carrying the lens and generating a permanent magnetic field and a fixed component for generating a variable magnetic field when powered on. The movable component is accommodated in the fixed component, and the magnetic fields between the two interact with each other to drive the movable component to move inside the fixed component, thereby achieving focusing. Among them, the fixed component of the voice coil motor device is assembled and matched with the outer shell through the base to form a receiving space to accommodate the movable component, and the base and the outer shell are assembled by gluing. Due to the large size of the voice coil motor device and the heavy weight of each component of the movable component, there is a risk of separation between the base and the outer shell of the voice coil motor device after passing the reliability test. Summary of the invention

[0003] In view of this, the present application provides a voice coil motor device that can solve the above problems. The voice coil motor device has high assembly precision and is not easy to separate.

[0004] In addition, it is also necessary to provide a lens module having the voice coil motor device.

[0005] In addition, it is also necessary to provide an electronic device having the lens module.

[0006] The present application provides a voice coil motor device, including a fixed component and a movable component carrying a lens, the movable component is accommodated in the fixed component; the fixed component includes an outer shell and a base, the outer shell includes an upper surface, a first side wall and a first accommodation space, the first side wall is formed by extending downward from the side edges of the upper surface respectively; the first accommodation space is surrounded by the upper surface and the first side wall, the upper surface is provided with a first circular hole, the base is provided with a second circular hole, and the centers of the first circular hole and the second circular hole are on the optical axis; the movable component is placed in the first accommodation space, and the lens carried on it is clamped at the first circular hole; one end of the movable component is mounted at the second circular hole of the base; the first side wall of the outer shell is provided with a plurality of positioning holes, and the base is correspondingly provided with a plurality of positioning posts, and the positioning posts are embedded in the positioning holes.

[0007] Optionally, the positioning column is a hot riveting column, and the positioning hole is a hot riveting hole.

[0008] Optionally, the hot riveting column is embedded in the hot riveting hole, and its outer surface is in the same vertical plane as the shell surface.

[0009] Optionally, the hot rivet hole is a groove with an opening at one end, and its opening faces the lower bottom edge of the first side wall. The base includes a supporting bottom plate and a second side wall. The second side wall is formed by extending upward from the side edge of the upper surface of the supporting bottom plate. The hot rivet column is arranged on the second side wall.

[0010] Optionally, a glue dispensing groove is provided on the outer surface of the second side wall of the base, and a curing glue dispensing column is installed in the glue dispensing groove.

[0011] Optionally, there are multiple glue dispensing grooves, which are arranged at intervals.

[0012] Optionally, the fixing assembly further includes a bracket, the bracket is cured and glued to the periphery of the base, and the glue-dispensing column is connected to two side edges of the bracket.

[0013] Optionally, the movable component includes a coil carrier carrying a lens, two permanent magnet groups, an upper spring sheet, and a lower spring sheet, the two permanent magnet groups are respectively fixed on the outer side wall of the coil carrier, the upper spring sheet and the lower spring sheet are respectively placed on the upper bottom surface and the lower bottom surface of the coil carrier, the lower spring sheet is placed on the base, and the movable component also includes a bracket frame, and the bracket frame is placed between the upper spring sheet and the housing;

[0014] The present application also provides a lens module using the voice coil motor device.

[0015] The present application also provides an electronic device using the lens module.

[0016] The voice coil motor device provided in the present application has positioning posts on the base and corresponding positioning holes on the housing, and the positioning posts are correspondingly embedded in the positioning holes on the housing, so that the voice coil motor device has high assembly precision and is not easy to separate.

[0017] The above description is merely an optimized specific implementation of the voice coil motor device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a voice coil motor device according to a preferred embodiment of the present application.

[0019] Figure 2 yes Figure 1 An exploded schematic diagram of a voice coil motor device is shown.

[0020] Figure 3 yes Figure 2 An exploded schematic diagram of a voice coil motor device is shown.

[0021] Figure 4 yes Figure 3 A three-dimensional schematic diagram of a base in a voice coil motor device is shown.

[0022] Figure 5A schematic diagram of an electronic device using the voice coil motor device described in the present application.

[0023] Main component symbols

[0024]

[0025]

[0026] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is considered to be "set on" another element, it may be directly set on the other element or there may be a central element at the same time.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] In order to further explain the technical means and effects adopted by the present application to achieve the intended purpose, the voice coil motor device provided by the present application is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0031] See also Figures 1 to 4 The preferred embodiment of the present application provides a voice coil motor device 1, which includes a fixed component 10 and a movable component 20. The movable component 20 is accommodated in the fixed component 10. The movable component 20 carries a lens (not shown in the figure) and generates a permanent magnetic field. The fixed component 10 is used to generate a variable magnetic field by energizing, and the magnetic fields therebetween interact with each other to drive the movable component 20 to move along the optical axis inside the fixed component 10, thereby achieving focusing.

[0032] The fixed component 10 includes a shell 12 , a base 14 and a bracket 16 . The shell 12 accommodates the movable component 20 and is sleeved on the base 14 and the bracket 16 . The base 14 , the bracket 16 cooperate with the shell 12 to precisely fix the movable component 20 in the fixed component 10 .

[0033] The housing 12 is a square frame with a hollow interior, which includes an upper surface 120, a first side wall 122, and a first receiving space (not shown in the figure). The first side wall 122 is formed by extending downward from the side edges of the upper surface 120. The first receiving space is surrounded by the upper surface 120 and the first side wall 122 to accommodate the movable component 20. A first circular hole 126 is opened on the upper surface 120, and the movable component 20 is placed in the first receiving space. The lens card carried thereon is set at the first circular hole 126. Two heat riveting holes 128 are provided on two opposite first side walls 122. The heat riveting holes 128 are grooves with one end open, and the open end faces the lower bottom edge 123 of the first side wall 122. The heat riveting holes 128 on the two bottom edges 123 are located in corresponding positions.

[0034] In this embodiment, there are a plurality of heat riveting holes 128, which are opened on the opposite first side walls 122. The heat riveting holes 128 can be opened on each first side wall 122. The heat riveting holes 128 can also be other positioning holes.

[0035] Please refer to Figure 4 The base 14 includes a square support base plate 140, two second side walls 142 and a second receiving space 143. The upper surface of the support base plate 140 is recessed downward to form a receiving groove 141, and a second circular hole 145 is opened on the receiving groove 141. The center of the second circular hole 145 and the center of the first circular hole 126 on the housing 12 are both on the optical axis, and the first circular hole 126 and the second circular hole 145 are of the same size, matching the size of the lens, so as to allow the lens to move; the two second side walls 142 are formed by the two side edges of the upper surface of the support base plate 140 extending vertically upward, and the two side edges of the two second side walls 142 are opposite side edges. The second receiving space 143 is surrounded by the support base plate 140 and the two second side walls 142 to receive the movable assembly 20. When the movable assembly 20 is received in the first receiving space of the housing 12, its bottom end is placed in the receiving groove 141 of the support base plate 140 and is accommodated in the second receiving space 143.

[0036] Two heat riveting posts 149 are provided on the two second side walls 142 of the support bottom plate 140, which are formed by protruding outward from the lower end of the outer side of the second side wall 142, and can be integrally formed with the base 14, or can be additionally provided on the base 14. The heat riveting posts 149 are inserted into the heat riveting holes 128 on the outer shell 12 through the opening at the lower end of the heat riveting holes 128. The heat riveting holes 128 can be partially thinned. After the heat riveting posts 149 are inserted into the heat riveting holes 128, the outer surface of the heat riveting posts 149 is on the same vertical plane as the outer shell 12, and will not protrude from the surface of the outer shell 12, thereby precisely fixing the movable component 20 inside the fixed component 10.

[0037] The heat rivet column 149 can be other positioning columns, and there are multiple of them, which are arranged corresponding to the heat rivet holes 128.

[0038] The outer surface of the second side wall 142 is provided with a plurality of glue dispensing grooves 146, which can be reserved for molding in a mold when the base 14 is molded. The glue dispensing grooves 146 can enhance the adhesive strength between the housing 12 and the base 14 and reduce the risk of separation. The glue dispensing grooves 146 are arranged at intervals.

[0039] The bracket 16 is a hollow square frame, which is surrounded by four side edges 160. The bracket 16 is designed to correspond to the support base plate 140 of the base 14, and is bonded and cured on the outside of the support base plate 140. A plurality of glue columns 162 are also connected to the two opposite side edges 160, and the glue columns 162 are arranged to correspond to the glue grooves on the second side wall 142 of the base 14, and are bonded and cured at the glue grooves 146. The glue grooves 146 can increase the adhesive strength between the housing 12 and the base 14 by glue, thereby reducing the risk of separation.

[0040] In this embodiment, the dispensing grooves 146 are multiple and are vertically arranged at intervals. Only one dispensing groove 146 can be provided, and the positions between the multiple dispensing grooves 146 can be set arbitrarily. The dispensing columns 162 on the bracket 16 are arranged to cure the dispensing corresponding to the dispensing grooves 146.

[0041] Please refer to Figure 3The movable assembly 20 includes a coil carrier 22, two permanent magnet groups 24, an upper spring sheet 26, a lower spring sheet 28, and a bracket frame 29. The two permanent magnet groups 24 are fixedly mounted on the outer wall of the coil carrier 22, respectively. The upper spring sheet 26 and the lower spring sheet 28 are respectively fixedly mounted on the upper bottom surface 220 and the lower bottom surface 221 of the coil carrier 22, and the bracket frame 29 is mounted on the upper spring sheet 26. The bracket frame 29 is arranged between the fixed assembly 10 and the upper spring sheet 26 of the movable assembly 20, and plays the role of connecting the fixed assembly 10 with the upper end of the movable assembly 20. The lower spring sheet 28 is placed in the receiving groove 141 of the base 14, so that the movable assembly 20 is installed on the base 14, and plays the role of connecting the movable assembly 20 with the lower end of the fixed assembly 10.

[0042] The coil carrier 22 carries the lens and is used to generate a variable magnetic field. The permanent magnet group 24 is used to generate a permanent magnetic field. The interaction force between the permanent magnetic field and the variable magnetic field drives the movable component 20 to move in the direction of the optical axis. The elastic force of the upper spring plate 26 and the lower spring plate 28 and the interaction force between the permanent magnetic field and the variable magnetic field constitute a pair of balancing forces, which jointly control the movable component 20 to remain in the focusing position.

[0043] In this embodiment, the above-mentioned connection method between the components in the movable component 2 is not limited to this method.

[0044] The coil carrier 22 is a hollow cylinder, which includes a third receiving space 21, which runs through the upper and lower surfaces of the coil carrier and is used to load the lens device. The third receiving space 21 corresponds to the first circular hole 126 on the housing 12 and the second circular hole 145 on the base 14, and the centers of the three are all on the optical axis.

[0045] The two permanent magnet groups 24 are rectangular parallelepiped and are fixed to two corresponding sides of the coil carrier 22. When the movable assembly 20 is placed on the base 14, the two permanent magnet groups 24 are placed at two sides of the base 14, adjacent to the two second side walls 142 on the support bottom plate 140.

[0046] The upper spring sheet 26 and the lower spring sheet 28 are square frames. A first through hole 261 is provided in the middle of the upper spring sheet 26, and a second through hole 281 is provided on the lower spring sheet 28. The first through hole 261 and the second through hole 281 are of comparable size, and correspond to the positions of the first circular hole 126 and the second circular hole 145, and are of the same size. When the coil is energized, the coil carrier 22 is displaced along the optical axis due to electromagnetic induction, thereby realizing the zoom and focus of the camera. The upper spring sheet 26 and the lower spring sheet 28 are used to generate elasticity. When the coil is not energized, the carrier can return to its initial horizontal position.

[0047] The bracket frame 29 is a square frame surrounded by four sides, placed between the housing 12 and the upper spring plate 26, used to fix the upper end of the movable component 20, and connected to the housing 12 of the fixed component 10. The lower spring plate 28 is used to connect and fix the lower end of the movable component 20 to the base 14 of the fixed component 10.

[0048] During installation, the bracket 16 is solidified and sleeved on the periphery of the base 14, and the pillar 160 is solidified at the glue dispensing groove 146, and then the bracket 16 is solidified and installed on the base 14; the permanent magnet group 24 is installed and fixed on the two opposite sides of the coil carrier 22, and the upper spring sheet 26 and the lower spring sheet 28 are respectively fixed on the upper bottom surface 220 and the lower bottom surface 221 of the coil carrier 22, and the bracket frame 29 is installed on the upper spring sheet 26, so that the movable component 20 is installed; the movable component 20 is installed on the receiving groove 141 of the base 14, and the lower spring sheet 28 is installed in the receiving groove 141, and the permanent magnet group 24 is placed on the side of the supporting bottom plate 140 of the base 14, adjacent to the second side wall 142; the shell 1 is sleeved on the base 14, and the hot riveting column 149 on the base 14 is correspondingly embedded in the hot riveting hole 128 on the shell 12, thereby realizing the assembly of the voice coil motor device 1.

[0049] See also Figure 5 The voice coil motor device 1 can be used in various electronic devices with a camera lens module 100, such as a mobile phone 200, a wearable device, a computer device, a vehicle or a monitoring device.

[0050] The voice coil motor device 1 provided by the present application has the following beneficial effects: by providing a heat rivet column 149 on the base 14, and correspondingly providing a heat rivet hole 128 on the shell 12, the heat rivet column 149 is correspondingly embedded in the heat rivet hole 128 on the shell 12, thereby making the voice coil motor device 1 have high assembly precision and not easy to separate. At the same time, a glue dot groove 146 is provided on the base 14, and a glue dot column 160 is cured in the glue dot groove 146, further increasing the adhesive strength between the shell 12 and the base 14, and reducing the risk of separation.

[0051] The above description is only an optimized specific implementation of the voice coil motor device, but it cannot be limited to this implementation in actual application. For ordinary technicians in this field, other modifications and changes made according to the technical concept of this application should fall within the scope of protection of the claims of this application.

Claims

1. A voice coil motor device, comprising a fixed component and a movable component carrying a lens, wherein the movable component is accommodated in the fixed component; The fixing assembly includes a shell and a base, the shell has a first receiving space and a first circular hole, the base is provided with a second circular hole, and the centers of the first circular hole and the second circular hole are on the optical axis; The movable assembly is accommodated in the first receiving space, and the lens carried thereon is clamped at the first circular hole; one end of the movable assembly is mounted at the second circular hole of the base; the characteristics are: A plurality of positioning holes are provided on the first side wall of the housing, and a plurality of positioning posts are correspondingly provided on the base, and the positioning posts are embedded in the positioning holes; The base includes a supporting bottom plate and a second side wall, wherein the second side wall is formed by extending from the supporting bottom plate; the second side wall is provided with a glue dispensing groove, and a glue dispensing column is installed and cured in the glue dispensing groove.

2. The voice coil motor device according to claim 1, wherein: The positioning column is a hot riveting column, and the positioning hole is a hot riveting hole.

3. The voice coil motor device according to claim 2, wherein: The heat riveting column is embedded in the heat riveting hole, and its outer surface is in the same vertical plane as the outer shell surface.

4. The voice coil motor device according to claim 3, wherein: The heat riveting hole is a groove with an opening at one end, and the opening faces the lower bottom edge of the first side wall of the shell, and the heat riveting column is arranged on the second side wall of the base.

5. The voice coil motor device according to claim 1, wherein: There are multiple glue dispensing grooves, which are arranged at intervals.

6. The voice coil motor device according to claim 5, wherein: The fixing assembly also includes a bracket, the bracket is cured and glued to the periphery of the base, and the glue-dispensing column is connected to two side edges of the bracket.

7. The voice coil motor device according to claim 2, wherein: The movable component includes a coil carrier that carries a lens, two permanent magnet groups, an upper spring sheet, and a lower spring sheet. The two permanent magnet groups are respectively fixed on the outer side walls of the coil carrier. The upper spring sheet and the lower spring sheet are respectively placed on the upper bottom surface and the lower bottom surface of the coil carrier. The lower spring sheet is placed on the base. The movable component also includes a bracket frame, which is placed between the upper spring sheet and the outer shell.

8. A lens module using the voice coil motor device according to any one of claims 1 to 7.

9. An electronic device using the lens module described in claim 8.

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