# US 11,121,615 B2 · Actuator and linear motion module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,615 B2 - Document ID: US11121615B2 - Status: Granted - Kind: B2 - Application number: 16/550,736 - Filed: 2019-08-26 - Published: 2019-12-12 - Granted: 2021-09-14 - Earliest claimed: 2016-05-13 - Assignees: Delta Electronics, Inc. - Applicants: Delta Electronics, Inc. - Inventors: Po-Tzu Chen; Chi-Wen Chung; En-Yi Chu; Chun-Hsiu Chen - Web page: https://patentgrep.com/patent/US11121615B2 ## CPC - H02K 41/02: Linear motors; Sectional motors - H02K 1/34: Reciprocating, oscillating or vibrating parts of the magnetic circuit - H02K 3/04: Windings characterised by the conductor shape, form or construction, e.g. with bar conductors - H02K 11/21: Devices for sensing speed or position, or actuated thereby (specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14) - H02K 41/031: {of the permanent magnet type} - H02K 11/215: Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract An actuator is provided, including a fixed assembly and a movable assembly. The fixed assembly includes a coil module, a base, a first screwing member, and a linear rail. The first screwing member passes through the base and the linear rail, and the linear rail is positioned on the base. The movable assembly includes a U-shaped back board having an inner space, a first magnetic module, a second magnetic module aligned with the first magnetic module, and a sliding block. The first and second magnetic modules are disposed on the U-shaped back board and accommodated in the inner space. The coil module is disposed between the first magnetic module and the second magnetic module. The sliding block is positioned on the U-shaped back board in the inner space, and slidably connected to the linear rail. ## Claims ### Claim 1 An actuator, comprising: a fixed assembly, comprising: a coil module, comprising a plurality of coils; a base; a first screwing member, passing through the base and the coil module, wherein the longitudinal axis of the first screwing member is parallel to that of the coils; and a linear rail, positioned on the base; and a movable assembly, comprising: a U-shaped back board, having an inner space; a first magnetic module, disposed on the U-shaped back board and accommodated in the inner space; a second magnetic module, disposed on the U-shaped back board and accommodated in the inner space, wherein the first magnetic module is aligned with the second magnetic module, and the coil module is disposed between the first magnetic module and the second magnetic module; a sliding block, positioned on the U-shaped back board, disposed in the inner space, and slidably connected to the linear rail, wherein the sliding block is disposed between the coil module and the U-shaped back board; a sensing object, positioned on the movable assembly; and a position detector, positioned on the fixed assembly and corresponding to the sensing object, wherein the movable assembly is driven to move relative to the fixed assembly along a moving direction, and the linear rail and the position detector are arranged along the moving direction. ### Claim 2 (depends on 1) The actuator as claimed in claim 1, wherein the fixed assembly further comprises at least one second screwing member, passing through the base and the linear rail. ### Claim 3 (depends on 2) The actuator as claimed in claim 2, wherein the fixed assembly further comprises a plurality of first screwing members and a plurality of second screwing members, and the first screwing members and the second screwing members are arranged in a staggered arrangement. ### Claim 4 (depends on 1) The actuator as claimed in claim 1, wherein the coil module comprises a main body and a connecting part connected to the main body, and the main body and the connecting part are integrally formed in one piece. ### Claim 5 (depends on 1) The actuator as claimed in claim 1, wherein the actuator further comprises an elastic member, connected the fixed assembly and the movable assembly. ### Claim 6 (depends on 5) The actuator as claimed in claim 5, wherein the elastic member comprises a spring. ### Claim 7 (depends on 1) The actuator as claimed in claim 1, wherein the actuator further comprises a cushion member, disposed on the fixed assembly and corresponding to an end of the linear rail. ### Claim 8 (depends on 1) The actuator as claimed in claim 1, wherein the actuator further comprises at least one housing, covering the position detector and the sensing object. ### Claim 9 (depends on 8) The actuator as claimed in claim 8, wherein the surface of the housing is aligned with the surface of the U-shaped back board. ### Claim 10 (depends on 1) The actuator as claimed in claim 1, wherein the coil module comprises a main body and a connecting part connected to the main body, and the rigidity of the connecting part exceeds that of the main body. ### Claim 11 (depends on 1) The actuator as claimed in claim 1, wherein the coil module comprises a plurality of coils and an epoxy, and the epoxy covers the coils. ### Claim 12 (depends on 1) A linear motion module, comprising: a plurality of actuators as claimed in claim 1, wherein the width of the fixed assemblies of the actuators exceeds that of the movable assemblies, and the linear rails are parallel to each other. ### Claim 13 (depends on 1) The actuator as claimed in claim 1, wherein a length of the position detector is shorter than a length of the sensing object in the moving direction. ### Claim 14 (depends on 1) The actuator as claimed in claim 1, wherein the U-shaped back board includes a first side plate on which the first magnet module is disposed and which has upper and lower ends, a second side plate on which the second magnet module is disposed and which has upper and lower ends, and a base plate connecting the lower end of the first side plate and the lower end of the second side plate, the upper end of the first side plate and the upper end of the second side plate being free from being connected to each other and thereby forming an opening.