PATENT DOCUMENT

Publication Number: US-10468956-B2
Application Number: US-201615016644-A
Country: US
Kind Code: B2

Title: Electrical component with moving mass and flexible cables

Abstract:
An electronic device may have an electrical component with a moving portion. The moving portion of the electrical component may include a moving mass and may include coils or other circuitry coupled to the moving mass. The moving mass may be supported within a support structure such as a housing structure. Springs may be coupled between walls in the housing structure and end portions of the moving mass. The coils or other circuitry on the moving mass may be coupled to flexible printed circuit cables. The flexible printed circuit cables may be coupled to the coils at the ends of the moving mass adjacent to the springs. The flexible printed circuit cables may have localized stiffeners that help prevent damage to metal traces in the cables during cable bending. The cables may have U-shapes or other suitable shapes.

Claims:
What is claimed is: 
     
       1. An electrical component, comprising:
 a housing comprising first and second opposing surfaces; 
 a first magnet coupled to the first surface; 
 a second magnet coupled to the second surface; 
 a moving mass assembly within the housing, wherein the moving mass assembly is interposed between the first and second magnets and moves parallel to the first and second opposing surfaces, wherein the moving mass assembly has a first side and a second side that extends from the first side at a non-zero angle; 
 a flexible printed circuit cable that is coupled to the first side of the moving mass assembly, wherein the flexible printed circuit cable bends around an axis; 
 a spring that is coupled to the housing and the second side of the moving mass assembly; and 
 a stiffener that selectively stiffens a portion of the flexible printed circuit cable and that overlaps the axis. 
 
     
     
       2. The electrical component defined in  claim 1  wherein the spring is formed from metal. 
     
     
       3. The electrical component defined in  claim 1  wherein the moving mass assembly includes a moving mass and at least one coil on the moving mass. 
     
     
       4. The electrical component defined in  claim 3  wherein the flexible printed circuit is coupled to the coil. 
     
     
       5. The electrical component defined in  claim 1  wherein the flexible printed circuit cable has a scissor shape with two legs. 
     
     
       6. The electrical component defined in  claim 1  wherein the flexible printed circuit cable includes a metal trace that is overlapped by the stiffener. 
     
     
       7. The electrical component defined in  claim 1  wherein the flexible printed circuit cable includes a metal trace that is not overlapped by the stiffener. 
     
     
       8. The electrical component defined in  claim 1  further comprising coils in the moving mass assembly that receive current through the flexible printed circuit cable. 
     
     
       9. Apparatus, comprising:
 a support structure having first and second surfaces, wherein the first surface extends from the second surface at a non-zero angle; 
 a moving mass that moves relative to the support structure, wherein the moving mass has a first side and a second side that extends from the first side at a non-zero angle; 
 a spring coupled to the first side of the moving mass and the first surface of the support structure; 
 a magnet mounted to the second surface of the support structure; 
 circuitry supported by the moving mass; 
 a U-shaped flexible printed circuit cable having a first end coupled to the first surface of the support structure and an opposing second end coupled to the circuitry on the second side of the moving mass, wherein the U-shaped flexible printed circuit cable is nested within a portion of the spring that is interposed between the moving mass and the support structure; 
 a stiffener that selectively stiffens a portion of the U-shaped flexible printed circuit and that is attached between the first end and the moving mass; and 
 a metal trace that is routed around the stiffener. 
 
     
     
       10. The apparatus defined in  claim 9  wherein the moving mass comprises a metal bar. 
     
     
       11. The apparatus defined in  claim 10  further comprising an additional stiffener that is attached between the first end and the metal bar. 
     
     
       12. The apparatus defined in  claim 9  wherein the circuitry comprises a plurality of coils of wire. 
     
     
       13. A vibrator, comprising:
 a housing; 
 a metal bar that vibrates within the housing; 
 a first spring having a first segment coupled to a first end of the metal bar and a second segment coupled to the housing; 
 a second spring coupled between an opposing second end of the metal bar and the housing; 
 a first flexible printed circuit formed from a first substrate coupled between the first end of the metal bar and the housing, wherein a portion of the first flexible printed circuit is interposed between the first segment and the second segment of the first spring, and wherein the first and second segments of the first spring are interposed between the first end of the metal bar and the housing; and 
 a second flexible printed circuit formed from a second substrate coupled between the second end of the metal bar and the housing. 
 
     
     
       14. The vibrator defined in  claim 13  further comprising permanent magnets mounted to the housing. 
     
     
       15. The vibrator defined in  claim 14  further comprising coils on the metal bar, wherein current passes from a first metal trace on the first flexible printed circuit to the coils on the metal bar and from the coils on the metal bar to a second metal trace on the second flexible printed circuit. 
     
     
       16. The vibrator defined in  claim 15  wherein the first and second flexible printed circuits comprise U-shaped flexible printed circuits. 
     
     
       17. The vibrator defined in  claim 15  wherein the springs comprise steel and wherein the first and second flexible printed circuits flex about respective first and second axes and wherein the first and second flexible printed circuits include stiffeners that selectively stiffen the first and second flexible printed circuits adjacent to the respective first and second axes. 
     
     
       18. The vibrator defined in  claim 13  wherein the second flexible printed circuit is nested within the second spring.

Description:
FIELD 
     This relates generally to electronic devices and, more particularly, to flexible circuit cables for electrical components with moving circuitry. 
     BACKGROUND 
     Electronic devices sometimes contain components with moving parts. For example, cellular telephones may contain vibrators that provide users with vibrating alerts. Vibrating alerts may be used to inform a user when an incoming telephone call has been received or when a timer has expired. 
     Vibrators contain moving masses that create vibrations when actuated using magnets and electromagnetic coils. To ensure reliable operation, a vibrator should be designed so that the vibrations associated with the use of the vibrator do not damage the circuitry of the vibrator. If care is not taken, a vibrator will not be sufficiently robust and may experience reliability issues. 
     SUMMARY 
     An electronic device may have an electrical component with a moving structure. The moving structure may include a moving mass and coils or other circuitry coupled to the moving mass. The moving mass may be supported within a support structure such as a housing structure. 
     Springs may be coupled between walls in the housing structure and end portions of the moving mass. The coils on the moving mass may be coupled to flexible printed circuit cables. The flexible printed circuit cables may be coupled to the coils at the ends of the moving mass adjacent to the springs. 
     Permanent magnets may be affixed to the housing structure. When current is applied to the coils through metal traces in the flexible printed circuit cables, the coils produce magnetic fields that interact with magnetic fields produced by the permanent magnets and cause the moving mass to vibrate. 
     The flexible printed circuit cables may have localized stiffeners that help prevent damage to metal traces in the cables during cable bending. The cables may have scissor shapes or other suitable shapes to enhance reliability. 
     Metal stiffeners may be welded to the moving mass and may be attached to the flexible printed circuit cables with heat activated film or other attachment mechanisms. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an illustrative electronic device in accordance with an embodiment. 
         FIG. 2  is a schematic diagram of an illustrative electronic device with vibrator or other component with moving parts in accordance with an embodiment. 
         FIG. 3  is a diagram of an illustrative moving-coil vibrator in accordance with an embodiment. 
         FIG. 4  is a cross-sectional side view of an illustrative vibrator in accordance with an embodiment. 
         FIG. 5  is a cross-sectional top view of an end portion of an illustrative vibrator in accordance with an embodiment. 
         FIG. 6  is a perspective view of a moving mass for a vibrator in accordance with an embodiment. 
         FIG. 7  is a perspective view of an illustrative flexible printed circuit cable that may be used to couple coils on a moving mass to a fixed terminal on a support structure such as a vibrator housing in accordance with an embodiment. 
         FIG. 8  is a perspective view of an illustrative scissor shaped flexible printed circuit cable for a vibrator in accordance with an embodiment. 
         FIG. 9  is a top view of the illustrative flexible printed circuit of  FIG. 8  in accordance with an embodiment. 
         FIG. 10  is a side view of the illustrative flexible printed circuit of  FIGS. 8 and 9  in accordance with an embodiment. 
         FIG. 11  is a side view of an end portion of a flexible printed circuit cable having stress-spreading localized stiffeners that overlap selected portions of a metal signal trace in accordance with an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Electronic devices may be provided with electrical components having moving parts. The electrical components may be vibrators that include moving masses to generate vibrational alerts for users include electrical components such as electromagnetic coils through which current flows during operation. Dynamically flexing cables such as flexible printed circuit cables can be used to convey current to the electrical circuitry in the moving portion of an electrical component. Configurations in which flexible printed circuits are used to convey current to coils on a moving mass in a vibrator are sometimes described herein as an example. This is, however, merely illustrative. Electronic devices may, in general, be supplied with any suitable type of electrical component with a moving structure coupled to a flexing cable. 
       FIG. 1  is a perspective view of an illustrative electronic device of the type that may include a vibrator or other component with a moving structure coupled to a flexing cable. Electronic device  10  may be a computing device such as a laptop computer, a computer monitor containing an embedded computer, a tablet computer, a cellular telephone, a media player, or other handheld or portable electronic device, a smaller device such as a wrist-watch device, a pendant device, a headphone or earpiece device, a device embedded in eyeglasses or other equipment worn on a user&#39;s head, or other wearable or miniature device, a television, a computer display that does not contain an embedded computer, a gaming device, a navigation device, an embedded system such as a system in which electronic equipment with a display is mounted in a kiosk or automobile, equipment that implements the functionality of two or more of these devices, an accessory (e.g., earbuds, a remote control, a wireless trackpad, etc.), or other electronic equipment. In the illustrative configuration of  FIG. 1 , device  10  is a portable device such as a cellular telephone, media player, tablet computer, wrist-watch device or other portable computing device. Other configurations may be used for device  10  if desired. The example of  FIG. 1  is merely illustrative. 
     In the example of  FIG. 1 , device  10  includes display  14 . Display  14  has been mounted in housing  12 . Electronic device housing  12 , which may sometimes be referred to as an enclosure or case, may be formed of plastic, glass, ceramics, fiber composites, metal (e.g., stainless steel, aluminum, etc.), other suitable materials, or a combination of any two or more of these materials. Housing  12  may be formed using a unibody configuration in which some or all of housing  12  is machined or molded as a single structure or may be formed using multiple structures (e.g., an internal frame structure, one or more structures that form exterior housing surfaces, etc.). Openings may be formed in housing  12  to form communications ports, holes for buttons, and other structures. 
     Display  14  may be a touch screen display that incorporates a layer of conductive capacitive touch sensor electrodes or other touch sensor components (e.g., resistive touch sensor components, acoustic touch sensor components, force-based touch sensor components, light-based touch sensor components, etc.) or may be a display that is not touch-sensitive. Capacitive touch sensor electrodes may be formed from an array of indium tin oxide pads, other transparent conductive structures, or other touch sensor electrode structures. 
     Display  14  may include an array of pixels formed from liquid crystal display (LCD) components, an array of electrophoretic pixels, an array of plasma display pixels, an array of organic light-emitting diode pixels or other light-emitting diode pixels, an array of electrowetting pixels, or pixels based on other display technologies. 
     Display  14  may be protected using a display cover layer such as a layer of transparent glass, clear plastic, transparent ceramic, sapphire or other transparent crystalline material, or other transparent layer(s). The display cover layer may have a planar shape, a convex curved profile, a concave curved profile, a shape with planar and curved portions, a layout that includes a planar main area surrounded on one or more edge portions that are bent out of the plane of the planar main area, or other suitable shape. An opening may be formed in the display cover layer to accommodate ports such as speaker port  18 . 
     One or more additional openings may also be formed in the display cover layer. For example, an opening may be formed in the display cover layer to accommodate a button such as button  16 . Button  16  may be formed from a transparent button member that moves within the opening in the display cover layer. The button member may be circular, may be square, or may have other suitable shapes and may be formed from the same material as the display cover layer or other suitable materials. Other configurations may be used for display  14 , if desired (e.g., button  16  may be formed from an integral region of the display cover layer, etc.). 
     To provide a user of device  10  with vibrational alerts, device  10  may be provided with one or more vibrators such as vibrator  20 . Vibrator  20  may be located in housing  12  at the upper end of device  10 , in the lower end of device housing  12  (as shown in  FIG. 1 ), or may be located elsewhere in device  10 . In configurations in which vibrator  20  is located at one of the ends of a device with an elongated housing such as housing  12  of device  10  of  FIG. 1 , the vibrational effects of vibrator  20  will have an enhanced impact, because the vibrator in these scenarios will be located away from the center of mass of device  10 . In general, however, vibrator  20  may be located in any suitable portion of device  10 . Vibrator  20  may be coupled to housing  12  using screws or other fasteners, adhesive, welds, mounting brackets, or other suitable attachment mechanisms. 
       FIG. 2  is a schematic diagram of an illustrative electronic device with a vibrator. As shown in  FIG. 2 , electronic device  10  may have control circuitry  22 . Control circuitry  22  may include storage and processing circuitry for supporting the operation of device  10 . The storage and processing circuitry may include storage such as hard disk drive storage, nonvolatile memory (e.g., flash memory or other electrically-programmable-read-only memory configured to form a solid state drive), volatile memory (e.g., static or dynamic random-access-memory), etc. Processing circuitry in control circuitry  22  may be used to control the operation of device  10 . The processing circuitry may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio chips, application specific integrated circuits, etc. 
     Input-output circuitry in device  10  such as input-output devices  24  may be used to allow data to be supplied to device  10  and to allow data to be provided from device  10  to external devices. Input-output devices  24  may include buttons such as button  16  and other buttons, joysticks, scrolling wheels, touch pads, key pads, keyboards, microphones, speakers (see, e.g., speaker  18 ), tone generators, vibrators such as vibrator  20  or other components with moving parts, cameras, sensors, light-emitting diodes and other status indicators, data ports, etc. A user can control the operation of device  10  by supplying commands through input-output devices  24  and may receive status information and other output from device  10  using the output resources of input-output devices  24 . Input-output devices  24  may include one or more displays such as display  14 . 
     Control circuitry  22  may be used to run software on device  10  such as operating system code and applications. During operation of device  10 , the software running on control circuitry  22  may display images on display  14  using an array of pixels in display  14 . The software running on control circuitry  22  may also supply current to vibrator  20  to cause vibrator  20  to vibrate. Vibrations may be produced by control circuitry  22  using vibrator  20  in response to incoming cellular telephone calls, in response to predetermined alarms, or in response to other suitable vibrator activation criteria. 
       FIG. 3  is a diagram of an illustrative vibrator of the type that may be used in device  10 . As shown in  FIG. 3 , vibrator  20  may have a support structure such as housing  30 . Magnets  32  may be mounted in a fixed position relative to housing  30 . Magnets  32  may, for example, be permanent magnets that are attached to the walls of housing  30  using adhesive, using mounting brackets, using recesses formed as integral portions of housing  30 , or using other suitable mounting structures. 
     Vibrator  20  may have movable structures such as moving mass assembly  34 . Moving mass assembly may be received within housing  30  and may be located between magnets  32 . Assembly  34  may include moving mass  36 . Moving mass  36  may be formed from a bar of metal such as a bar of tungsten or other heavy material. Wire coils  38  may be attached to moving mass  36 . For example, coils  38  may be glued into place within recesses in moving mass  36  using adhesive or may be attached to moving mass  36  using other suitable attachment mechanisms. 
     Coils  38  may be coupled in series between first and second respective vibrator terminals  44 . When it is desired to produce vibrations with vibrator  20 , control circuitry  22  may supply current to coils  38  through terminals  44 . This causes coils  38  to produce magnetic fields that interact with the magnetic fields produced by permanent magnets  32  and thereby vibrate moving mass assembly  34  back and forth in directions  46 . 
     Moving mass assembly  34  may be suspended between the walls of housing  30  or other support structures in vibrator  20  using springs  40 . Springs  40  may be flat springs, coil springs, serpentine springs, or other suitable springs. Configurations in which springs  40  are flat springs that are bent (i.e., configurations in which springs  40  are leaf springs) may sometimes be described herein as an example. Springs  40  may be formed from spring metal (e.g., spring steel) or other suitable flexible springy material. 
     Terminals  44  of vibrator  20  may be coupled to coils  38  using flexible cables  42 . Flexible cables  42  are bent back and forth repeatedly during operation of vibrator  20  (e.g., flexible cables  42  may be dynamically flexed at frequencies of 100 Hz to 1000 Hz, at frequencies above 100 Hz, or at frequencies below 1000 Hz), so flexible cables  42  are preferably formed from bendable cable structures that are reliable when bent numerous times. With one suitable arrangement, which may sometimes be described herein as an example, flexible cables  42  may be formed from flexible printed circuit substrates (i.e., cables  42  may be flexible printed circuits). Configurations in which cables  42  are formed from other structures (e.g., flexible wires, etc.) may also be used. The use of flexible printed circuits to form signal paths for coupling terminals  44  to coils  38  is merely illustrative. 
     A cross-sectional side view of an illustrative moving-coil vibrator that has flexible printed circuit cables  42  for coupling terminals  44  to coils  38  is shown in  FIG. 4 . As show in  FIG. 4 , coils  38  (e.g., first coil  38 - 1 , second coil  38 - 2 , third coil  38 - 3 , and fourth coil  38 - 4  in the example of  FIG. 4 ) may be mounted to moving mass  36  and may be suspended between housing walls at opposing ends of housing  30  using springs  40 . There may be any suitable number of loops of conductive material (conductive lines) in moving mass assembly  34 . The use of an arrangement with four coils  38  in  FIG. 4  is illustrative. Each coil  38  may have one or more turns, two or more turns, three or more turns, or four or more turns (as examples). 
     Control circuitry  22  ( FIG. 2 ) may be coupled to terminals  44  of vibrator  20  to supply vibrator  20  with control signals. First and second flexible printed circuit cables  42  at respective first and second opposing ends of moving mass assembly  34  may run in parallel with first and second springs  40  at the first and second ends of moving mass assembly  34  and may extend through the walls of housing  30  to electrically connect the ends of coils  38  to respective terminals  44  on the exterior of housing  30 . 
       FIG. 5  is a top view of an illustrative end portion of vibrator  20  showing how flexible printed circuit cable  42  and associated spring  40  may have bent shapes. This allows each flexible printed circuit cable  42  to be nested within a respective spring  40 . As shown in  FIG. 5 , spring  40  may be coupled between moving mass  36  and housing  30  using connections  48 . Vibrator housing (support structure)  30  may be formed from plastic, metal, other materials, or combinations of these materials. Connections  48  may be welds (e.g., when coupling metal structures together), may include fasteners, and/or may include adhesive or other attachment structures. 
     Flexible printed circuit cable  42  of  FIG. 5  may have a first end such as end  42 - 1  that is coupled to coil wire  38 ′ of coils  38  on moving mass  36  and an opposing second end such as end  42 - 2  that serves as part of terminal  44 . End  42 - 2  may be coupled to signal paths on a structure such as external flexible printed circuit  52  using solder  50  or other conductive coupling mechanisms. Signal lines in flexible printed circuit cable  52  or other signal paths may be used to couple terminal  44  to control circuitry  22 . During operation of vibrator  20 , moving mass  36  moves in directions  46  and flexible printed circuit cable  42  and spring  40  will flex about axis  54 . 
     A perspective view of an illustrative end portion of moving mass assembly  34  is shown in  FIG. 6 . As shown in  FIG. 6 , one or more flexible printed circuit stiffeners such as stiffeners  56  may be attached to moving mass  36 . Stiffeners  56  may be formed from stainless steel sheet metal (e.g., sheet metal with a thickness of 0.1 mm or other suitable thickness) and may be attached to flexible printed circuit  42  using an adhesive such as heat activated film or other attachment mechanisms. Stiffeners  56  may be attached to upper surface  36 ′ of moving mass  36  using laser welds  58  or other attachment mechanisms (adhesive, fasteners, crimped connections, etc.). An end portion of coil wire  38 ′ of coils  38  may be coupled to a solder pad formed from a metal trace in flexible printed circuit cable  42  at end  42 - 1  using solder  60 . 
     An illustrative configuration for flexible printed circuit cable  42  is shown in  FIG. 7 . Cable  42  may contain a metal trace such as a layer of copper or other metal (e.g., high fatigue limit copper) and may contain substrate layer(s) of flexible polymer such as sheet(s) of polyimide or other flexible dielectric layers. The metal trace in cable  42  may carry current to coils  38  in moving mass assembly  34 . The metal trace may be formed on the outer surface of the flexible printed circuit (e.g., the trace may be formed on top of a layer of polyimide or other flexible printed circuit substrate layer) or may be embedded between flexible polymer layers (e.g., the trace may be embedded between upper and lower polyimide layers or other flexible printed circuit substrate layers). Other configurations (e.g., configurations involving multiple layers of metal traces, metal traces with vias, etc.) may be used in forming flexible printed circuit cable  42 , if desired. 
     With a configuration of the type shown in  FIG. 7 , cable  42  may be formed from a single rectangular strip of flexible printed circuit substrate material. The strip of flexible printed circuit material that makes up cable  42  may be bent about axis  54  at bent end  62  to form two elongated legs  42 L. Coupling material  64  may be placed between portions of the inwardly facing surfaces of legs  42 L adjacent to end  62  and bend axis  54 . This holds the legs  42 L in the bent region of cable  42  together and helps transfer stress from bent end  62  towards ends  42 - 1  and  42 - 2  of legs  42 L (i.e., stress is transferred from end  62  towards region  66 ). By reducing localized stress at end  62 , the maximum amount of stress imparted on the metal trace in cable  42  may be reduced, thereby reducing the risk of crack formation in the metal trace and enhancing reliability. Spring  40  may have a rectangular strip shape with a bend about axis  54  (i.e., spring  40  may have a leaf-spring shape that matches that of illustrative printed circuit cable  42  of  FIG. 7 ) or may have other suitable shapes. 
     If desired, flexible printed circuit cable  42  may have a scissor shape, as shown in  FIG. 8 . With the illustrative configuration of  FIG. 8 , legs  42 L may separate from each other when the portion of cable  42  at end  62  twists about axis  54  (i.e., cable  42  has a U shape with legs that bend out of the plane of the U). The scissor shape of flexible printed circuit cable  42  of  FIG. 8  may help reduce stress on the metal trace (e.g., the copper trace) of cable  42  and may allow flexible printed circuit  42  to withstand a large number of high-frequency cycles (e.g., 100 million cycles at 100-1000 Hz or more). Due to the scissor shape of cable  42 , legs  42 L will not touch each other during flexing of legs  42  about axis  54 . The thickness of cable  42  may be 50-100 microns, more than 25 microns, less than 200 microns, or other suitable thickness. The metal trace in cable  42  may have a thickness of 10-100 microns, less than 40 microns, more than 10 microns, or other suitable thickness. The metal trace in cable  42  may span 50% of the width of cable  42 , 10-90% of the width of cable  42 , more than 20% of the cable width, or less than 80% of the cable width. 
     As shown in the illustrative top view of scissor-shaped flexible printed circuit cable  42  in  FIG. 9 , cable  42  may be provided with one or more local stiffening structures such as stiffening layers  68 . Stiffeners such as layers  68  may be formed from layers of polyimide, cured adhesive layers, metal layers, or other layers that locally enhance the stiffness of cable  42 . Stiffeners  68  may be provided on selected portions of cable  42  in the vicinity of bend axis  54  at end  62  to help move stress outwardly along the lengths of legs  42 L and thereby enhance cable reliability. 
       FIG. 10  is a side view of scissor-shaped flexible printed circuit cable  42  of  FIGS. 8 and 9  in an illustrative configuration in which metal trace  70  of cable  42  is routed around stiffeners  68  and is not overlapped by stiffeners  68 . As shown in  FIG. 10 , the elongated strip of flexible printed circuit material that makes up cable  10  may be characterized by a width W (i.e., legs  42 L may each have a width W). Each leg  42 L may be also be characterized by a length L. Width W may be 0.7 mm, may be 0.2 to 1.5 mm, may be more than 0.4 mm, or may be less than 1 mm (as examples). Length L may be 10 mm, may be 1-15 mm, may be more than 3 mm, may be less than 20 mm, or may be any other suitable length. 
     If desired, stiffeners  68  may overlap metal trace  70 , as shown in the illustrative configuration of  FIG. 11 . Arrangements in which one stiffener  68  overlaps trace  70  and another stiffener does not overlap trace  70  or in which stiffener  68  extends along larger portions of cable  42  may also be used. The configurations of  FIGS. 10 and 11  are merely illustrative. 
     Although sometimes described in the context of a moving mass assembly in a component such as a vibrator, flexible printed circuit cables such as cable  42  may be used to couple a moving portion of any suitable electric component to terminals on a non-moving support structure or other stationary part of the component. For example, scissor-shaped cables and other cables  42  may be used to couple together moving and stationary portions of speakers, cameras, buttons, sensors, and other components. The use of flexible printed circuit cables  42  at the ends of a moving mass assembly with coils in an electromagnetic vibrator component is merely illustrative. 
     The foregoing is merely illustrative and various modifications can be made by those skilled in the art without departing from the scope and spirit of the described embodiments. The foregoing embodiments may be implemented individually or in any combination.

Metadata:
Filing Date: 20160205
Publication Date: 20191105
Grant Date: 20191105
Priority Date: 20160205
Inventors: ZHANG, Yaocheng
FROESE, KEVIN M.
DINH, RICHARD H.
DABOV, TEODOR
Assignee: APPLE INC
CPC Classifications: [{"code": "H02K33/18", "inventive": true, "first": true, "tree": "[]"}, {"code": "H02K33/18", "inventive": true, "first": true, "tree": "[]"}, {"code": "H02K33/18", "inventive": true, "first": true, "tree": "[]"}]
Family ID: 59496359