Patents Assigned to Mitsumi Electric Co., Ltd.
  • Publication number: 20240146300
    Abstract: Disclosed is a semiconductor integrated circuit device including: a switching transistor connected between a voltage input terminal where DC voltage is input and a voltage output terminal; a discharging transistor connected between the voltage output terminal and a ground point; an external terminal where a control signal of an external device is input; and a control circuit including a logic circuit and controlling and turning on or off the switching transistor and the discharging transistor based on the control signal. Upon the control signal input to the external terminal being at a first logic level, the logic circuit generates a signal that turns on the switching transistor and turns off the discharging transistor. Upon the control signal being at a second logic level, the logic circuit generates a signal that turns off the switching transistor and turns on the discharging transistor.
    Type: Application
    Filed: October 27, 2023
    Publication date: May 2, 2024
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yoichi TAKANO, Kohei SAKURAI
  • Patent number: 11962883
    Abstract: Provided are a lens driving device, a camera module, and a camera mounting device with which miniaturization and weight reduction can be achieved. This lens driving device is provided with: a stationary part; and a movable part configured to be capable of holding a lens part and movably connected to the stationary part, wherein the stationary part has a flat plate-like base, the base has a thick part and a thin part having a smaller thickness than the thick part, and a reinforcing plate is embedded into the thin part. Specifically, the reinforcing plate is formed of a metal material and is embedded into the resin base by insert-molding.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: April 16, 2024
    Assignee: Mitsumi Electric Co., Ltd.
    Inventor: Taishi Sugiura
  • Publication number: 20240118588
    Abstract: A lens driving apparatus includes: a lens holder for holding a lens; a fixing part configured to contain the lens holder such that the lens holder is capable of moving in a direction of an optical axis; a pair of ball arrays disposed with a gap therebetween at an outside of the lens holder and each disposed in parallel to the optical axis; an urging part provided to the fixing part and configured to urge one ball array of the pair of ball arrays in a direction orthogonal to the optical axis to hold the lens holder such that the lens holder is capable of moving in the direction of the optical axis; and a driving part configured to move the lens holder in the direction of the optical axis.
    Type: Application
    Filed: December 18, 2023
    Publication date: April 11, 2024
    Applicant: Mitsumi Electric Co., Ltd.
    Inventor: Masayoshi SUGAWARA
  • Publication number: 20240119823
    Abstract: The present invention suppresses the unnecessary detection of an occurrence of a person being left behind in a vehicle. A vehicle occupant detection device (100) comprises: a distance detection unit (101) that detects the relative distance between a vehicle (200) and a first occupant; an occupant detection unit (102) that detects the presence/absence of a second occupant in the vehicle (200); and an execution timing controller (103) that, according to the detected relative distance, controls the execution timing of the detection operation by the occupant detection unit (102).
    Type: Application
    Filed: November 24, 2021
    Publication date: April 11, 2024
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Nobutaka SHIMIZU, Akihiko KOJIMA
  • Publication number: 20240118587
    Abstract: An optical element driving device includes a fixed body, a movable body, a driving part that converts vibration motion of a piezoelectric element into linear motion for driving the movable body, a drive control part that applies a drive signal to the driving part, a drive detection part that detects the drive state of the driving part, and a temperature measurement part that measures an ambient temperature. The drive control part determines whether or not a drive error of the driving part occurs from the information detected by the drive detection part. When the drive error occurs, drive control part compares an ambient temperature associated with the current drive frequency with the current ambient temperature measured by the temperature measurement part, corrects the drive frequency according to the comparison result, and stores the corrected drive frequency and the current ambient temperature in association with each other.
    Type: Application
    Filed: October 4, 2023
    Publication date: April 11, 2024
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Koki HIWATASHI, Yoichi ITAGAKI
  • Patent number: 11949258
    Abstract: A control system includes a secondary battery protection apparatus and a device. The secondary battery protection apparatus includes one or more monitoring terminals each provided in a path different from power paths, each monitoring terminal being operable for monitoring a potential at a negative electrode of a given secondary battery cell among a plurality of the secondary battery cells. The secondary battery protection apparatus includes one or more internal switches each of which is provided in an internal line between the negative electrode of a given secondary battery cell and a given monitoring terminal. The device includes a balance control circuit that adjusts, based on potentials monitored by the monitoring terminals, a current flowing into a line path that includes a corresponding internal line. The balance control circuit controls balance among the cell voltages for the secondary battery cells, based on the adjusted current.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: April 2, 2024
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Hirotaka Kataya, Iwao Kitamura
  • Patent number: 11948758
    Abstract: A push switch contains a circuit substrate, two fixed contacts disposed on the circuit substrate, a dome-shaped spring which is disposed above the two fixed contacts and can be displaced between a first position in which the two fixed contacts are in a non-conductive state and a second position in which the two fixed contacts are in a conductive state and a conductive elastic member disposed on a surface of the dome-shaped spring facing the circuit substrate and having a surface facing the two fixed contacts. At least the surface of the conductive elastic member facing the two fixed contacts has conductivity. When the dome-shaped spring is displaced to the second position, the two fixed contacts are in the conductive state through the conductive elastic member.
    Type: Grant
    Filed: January 17, 2023
    Date of Patent: April 2, 2024
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Daiki Fujimoto, Hidetake Kikuchi
  • Publication number: 20240105373
    Abstract: Provided is a control device controlling an electromagnetic actuator that drives an operation device, supported in an elastically vibratable manner by an elastic support part, in one direction of a vibration direction of the operation device to vibrate the operation device. The control device includes a circuit that applies a main driving signal to a coil of the electromagnetic actuator to start vibration of the operation device in response to a touch operation on the operation device, then applies a sub-driving signal to the coil to adjust an attenuation period of the vibration. The sub-driving signal has a variable voltage varying with an offset voltage, as a center value, offset from a zero voltage, and a waveform that indicates a variation in the variable voltage is a sine function curve or a cosine function curve.
    Type: Application
    Filed: September 18, 2023
    Publication date: March 28, 2024
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Toru DAN, Thi Hong Thu NGUYEN
  • Publication number: 20240096536
    Abstract: Provided is a control device controlling an electromagnetic actuator that drives an operation device, supported in an elastically vibratable manner by an elastic support part, in one direction of a vibration direction of the operation device to vibrate. The control device includes a circuit that applies a main driving signal to a coil of the electromagnetic actuator to start vibration of the operation device in response to a touch operation on the operation device, then applies a sub-driving signal to the coil to adjust an attenuation period of the vibration. The sub-driving signal has a variable voltage varying with an offset voltage, as a center value, offset from a zero voltage, and a waveform that indicates a variation in the variable voltage is a sine function curve or a cosine function curve. The circuit applies the sub-driving signal while changing the offset voltage for each cycle.
    Type: Application
    Filed: September 18, 2023
    Publication date: March 21, 2024
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Toru DAN, Thi Hong Thu NGUYEN
  • Patent number: 11936250
    Abstract: A movable magnet is configured by alternately magnetizing an even number of magnetic poles at an outer periphery of a shaft part; a number of core magnetic poles as magnetic poles of a core body and a number of magnetic poles of the movable magnet are equal to each other; the core magnetic poles are disposed to face the movable magnet with an air gap therebetween on an outer peripheral side of the movable magnet in a direction orthogonal to the shaft part; a drive unit is provided with a magnet position holding part provided to face the movable magnet and magnetically attracts the movable magnet to a reference position; the core body is formed to surround an even number of the core magnetic poles; and a coil body is disposed at the core body adjacent to each of the even number of the core magnetic poles.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: March 19, 2024
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yasutaka Kitamura, Yuki Takahashi, Masaharu Kagami, Yuki Otsuka
  • Patent number: 11927875
    Abstract: The lens driving device includes: an AF movable part; an AF fixing part disposed spaced apart from the autofocus movable part; an AF driving section that moves the AF movable part in an optical-axis direction with respect to the AF fixing part; an OIS movable part that includes the AF movable part, the AF fixing part and the AF driving section; an OIS fixing part disposed spaced apart from the OIS movable part; and an OIS driving section that sways the OIS movable part in a plane orthogonal to the optical-axis direction with respect to the OIS fixing part. The AF movable part includes a first position detection magnet and the OIS fixing part includes a hall element provided facing the first position detection magnet in the optical-axis direction.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: March 12, 2024
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Masayoshi Sugawara
  • Patent number: 11929579
    Abstract: An electrical connector contains a first contact group arranged on a first contact plane, a second contact group arranged on a second contact plane and a ground plate located on a ground plane. The ground plate is located between horizontally extending portions of the contacts of the first contact group and horizontally extending portions, downwardly extending portions and terminal portions of the contacts of the second contact group in addition to between contacting portions and the horizontally extending portions of the contacts of the first contact group and contacting portions and the horizontally extending portions of the contacts of the second contact group.
    Type: Grant
    Filed: April 20, 2023
    Date of Patent: March 12, 2024
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takashi Kawasaki, Hiroyuki Sadohara, Taro Mizue
  • Publication number: 20240079888
    Abstract: A secondary battery protection integrated circuit includes a first power supply terminal, a second power supply terminal, an input terminal, an output terminal, and a control circuit. The control circuit turns a discharge control transistor off to change to a discharge-blocked state in which the output terminal and the first power supply terminal are coupled to each other, upon occurrence in a condition in which a potential level of the input terminal changes from a first level. The control circuit turns the discharge control transistor on in the discharge blocked state, upon occurrence of a condition in which the input terminal changes from a second level that is different from the first level.
    Type: Application
    Filed: August 7, 2023
    Publication date: March 7, 2024
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takeshi YAMAGUCHI, Junji TAKESHITA
  • Patent number: 11909291
    Abstract: A rotary reciprocating drive actuator reciprocally and rotationally driving the movable body about the shaft part in relation to the fixed body by the electromagnetic mutual effect of the coil and the movable magnet, wherein the movable magnet is magnetized in the radial direction of the shaft part, the two magnetic poles are disposed facing each other across an air gap in the radial direction of the movable magnet and the shaft part, and the fixed body has a rotation-angle-holding part disposed facing the movable magnet across the air gap, the rotation-angle-holding part holding the rotation angle position of the movable magnet by the magnetic attraction force generated with the movable magnet.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: February 20, 2024
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yuki Takahashi, Yasutaka Kitamura, Masaharu Kagami, Shigenori Inamoto
  • Patent number: 11909151
    Abstract: An electrical connector includes a contact pin to be connected to a core wire of a coaxial cable, an insulating housing for holding the contact pin therein, a cylindrical outer contact covering the housing and a crimping member for attaching the outer contact to the coaxial cable. A base end portion of the outer contact is located between an inner insulator layer and an outer conductor layer of the coaxial cable. The outer contact is attached to the coaxial cable by crimping the crimping member onto the outer conductor layer of the coaxial cable located on the base end portion of the outer contact.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: February 20, 2024
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Kazuma Endo, Hiroyuki Sadohara, Takahiro Kanda
  • Patent number: 11908640
    Abstract: A push switch contains a case including a containing portion and a sealing groove; a pair of contacts disposed in the containing portion so as to be spaced apart from each other; a movable contact which is disposed above the pair of contacts in the containing portion; a cap including a base portion disposed on the case and a sealing protrusion protruding from a peripheral edge portion of the base portion toward a lower side for liquid-tightly sealing the sealing groove of the case; and a cover attached to the case from an upper side so as to hold the cap on the case. The sealing protrusion of the cap is compressively deformed in the sealing groove of the case, and thereby the sealing groove of the case is liquid-tightly sealed.
    Type: Grant
    Filed: July 15, 2022
    Date of Patent: February 20, 2024
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yoichi Yasunaga, Takashi Kawamura
  • Publication number: 20240045170
    Abstract: An optical element driving device configured to drive an optical element, the optical element driving device including: a holding part configured to hold an optical element; a housing part configured to house inside the holding part; and a supporting part interposed between an outer peripheral surface of the holding part and an inner peripheral surface of the housing part, and including a plurality of rolling members configured to be held by a retainer in a rollable manner, the supporting part being configured to support the holding part with the plurality of rolling members such that the holding part is movable with respect to the housing part. At least one of the outer peripheral surface and the inner peripheral surface includes a first recess formed at a portion facing the retainer.
    Type: Application
    Filed: August 3, 2023
    Publication date: February 8, 2024
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Tomohiko OSAKA, Shun SUZUKI
  • Publication number: 20240045309
    Abstract: This optical element drive device comprises: a movable part; a drive unit; a substrate part that can supply power to the movable part; and a power supply path unit that constitutes a power supply path between the substrate part and the movable part by extending so as to connect a substrate-part-side terminal and a movable-part side terminal that are set apart from each other in a second direction, the power supply path unit having in at least a portion a coil part that can extend and contract in accordance with the movement of the movable part.
    Type: Application
    Filed: November 22, 2021
    Publication date: February 8, 2024
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Tomohiko OSAKA, Shun SUZUKI
  • Publication number: 20240045169
    Abstract: An optical element driving device includes: a driving part configured to drive a holding part configured to hold an optical element; a substrate including a circuit including an inductor configured to increase an input voltage to the driving part; and a cover member comprising a metal and including an opening and a flange part extending at an outer periphery of the opening, the cover member being configured to cover the inductor in a state where the inductor is housed in the opening and the flange part is disposed on the substrate. The substrate includes a metal layer disposed to face the inductor. The metal layer is formed to include a region where the inductor is disposed in plan view.
    Type: Application
    Filed: August 3, 2023
    Publication date: February 8, 2024
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Tomohiko OSAKA, Shun SUZUKI
  • Publication number: 20240045311
    Abstract: An optical element driving device includes: a holding part configured to hold an optical element; a housing part configured to house the holding part such that the holding part is movable in an optical path direction of the optical element; a driving part including a piezoelectric element configured to drive the holding part; an inductor configured to increase an input voltage to the piezoelectric element; and a position sensor configured to acquire a relative position of the holding part and the housing part in the optical path direction by detecting a magnetic force of a magnet. In regions defined by dividing the holding part and the housing part into equal quarters around an optical axis, the driving part and the position sensor are disposed in a same region, and the inductor is disposed in a region different from the same region.
    Type: Application
    Filed: August 3, 2023
    Publication date: February 8, 2024
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Shun SUZUKI, Tomohiko OSAKA