Denso Corporation

Kabushiki Kaisha Tokai Rika Denki Seisakusho

Tokio Shimura

Mitsuru Nakagawa

Masashi Hashimoto

Toshiaki Saito

Hiroyuki Kitagawa

An electronic key includes a mechanical key, a case in which to store the mechanical key, and a restraint member provided to the case and restraining the mechanical key from falling out of the case. The mechanical key includes a key engagement plane which is a plane perpendicular to an axial direction of a bar portion in a lock state. The restraint member includes a lock engagement plane which is a plane perpendicular to the axial direction of the bar portion in the lock state and engages with the key engagement plane. At least one of the key engagement plane and the lock engagement plane forms a stepped plane structure including a plurality of engagement planes provided at different positions in the axial direction of the bar portion of the mechanical key and engageable with the other one of the key engagement plane and the lock engagement plane.

Electronic key

A portable transmitter includes a circuit board having a button battery and an antenna; and a case accommodating the battery and the circuit board. The case includes first and second case members being engaged with each other. A concave portion is formed on the first or second case members to accommodate the button battery, and a lock portion is formed on the first or second case members to lock the circuit board. While the concave portion accommodates the button battery and the circuit board is locked by the lock portion, a surface of the circuit board and a surface of the button battery are attached, and the first case member and the second case member are engaged.

Portable transmitter powered by button battery

A portable wireless key having an emergency key includes a body in which the emergency key is held. The body has an operation surface and a protrusion action portion. The operation surface defines a part of an outer side surface of the body. The protrusion action portion has a hook that is held in the body under a condition that the emergency key is held in the body. One push to the operation surface causes the protrusion action portion to perform a protrusion action. The protrusion action causes the protrusion action portion to protrude outward from the body in such a manner that the hook of the protrusion action portion is exposed outside the body.

Portable wireless key

An electronic key includes a case having therein an internal space; a circuit board including a transmit portion for transmitting a radio wave, a control portion for outputting a control signal for instructing the transmit portion to send the radio wave and an internal switch for instructing the control portion to output the control signal; a waterproof cover for protecting the circuit board; an external switch configured to be bent when being pressed by a user; and a flexible sheet arranged between the waterproof cover and a surface of the circuit board on which the internal switch is arranged. The circuit board, the flexible sheet, the waterproof cover and the external switch are arranged in series in the internal space. The internal switch receives a press-force by the user from the external switch via the waterproof cover and the flexible sheet.

A portable device includes an operating part, a circuit board, and a case body for housing the operating part and the circuit board. The circuit board has a circuit section configured to transmit a signal to an external device. A terminal electrode and a pair of switch electrodes are disposed on the circuit board. The terminal electrode supplies electricity from a power source to the circuit section. A switch element is configured to electrically couple the pair of switch electrodes in accordance with an operation of the operating part. A resin member is disposed on the circuit board in such a manner that the circuit section is covered with the resin member and the terminal electrode and the pair of switch electrodes are exposed to an outside of the resin member.

Portable device for transmitting signal

A portable remote control key case including a first case shell and a second case shell that are securely fastened to each other. The case includes a case body, which has a component chamber and a key socket, and a mechanical key, which is partially received in the key socket. First and second engagement projections are formed extending across a boundary between the first and second case shells. The mechanical key includes clamp portions for clamping the first and second engagement projections.

Case for remote control key

The body of a portable device of an electronic key system includes a lock mechanism for removably holding an emergency key held in a housing of the body. The mechanism includes a rotary member and a torsion coil spring. The rotary member is supported rotatably on the body, and when a first end of the member is pushed inward of the body in the direction perpendicular to the rotary shaft, a second end of the member is raised outward of the body. The spring applies a constant force to the first end outward of the body. The second end is formed with a protrusion adapted to be fitted in a hole of the forward end of the key held in the housing. With the key held in the housing, the protrusion is disengaged from the hole and the key can be pulled out by pushing the first end.

Portable device for electronic key system

In a radio signal transmitter, a microcomputer operates by receiving an output voltage of a battery to sequentially generate a voltage boosting control signal. This voltage boosting control signal has a longer high level period as generated later. The voltage booster circuit boosts the output voltage of the battery by increasing the number of times of oscillating operations during the high level period of the voltage boosting control signal depending on the increased high level period.

Signal transmitter having voltage booster circuit and method of operating the same

A case of a portable equipment for communication to an external system comprises a body portion and an operation portion acting as a function member. At least a portion of the case is provided with a decorative film having a resin film having transparency and a print layer printed on a back surface of the resin film in a predetermined pattern, and a resin base member formed on a back surface of the decorative film so as to contact the print layer. The front surface of the decorative layer is exposed as a most outside surface of the case.

Case for portable equipment

A protective cushion is provided which works to absorb accidental physical impact acting on an antenna unit built in a portable unit such as a remote keyless entry transmitter for automotive vehicles. The protective cushion includes dampers each of which has a first and a second contact. The cushion is disposed within a casing in elastic abutment of the first contacts with the antenna unit and the second contacts with an inner surface of the casing, thereby absorbing physical impact transmitted to the antenna unit which is produced, for example, when the user drops the portable unit accidentally, thereby avoiding the detachment of the antenna unit from a circuit-fabricated substrate and/or breakage of the antenna unit itself.

Growing community of inventors

Kariya, Japan

Tokio Shimura