Ngk Spark Plug Company, Limited

Yoshihiko Kohmura

Takafumi Oshima

Takio Kojima

Shunsuke Maeda

Masanori Suda

Yasuhisa Kuzuya

Shingo Yoshida

Noriyasu Sugimoto

Yusuke Fuji

Minoru Yasuda

Wataru Kawagishi

Yoshinori Tsujimura

Toshiharu Ito

Masaru Kondo

Masatoshi Ueki

Takaya Hirai

Takashi Koda

Kouichi Ikawa

A method for producing a resin joined body in which a specific region Lof a welding portion of a second resin member () is provided to form a low-laser-light-transmissible portion, and the low-laser-light-transmissible portion has a laser light transmissibility lower than that of a region of the welding portion other than the specific region L. Welding is carried out so that a portion between points Sand F, serving as a weld overlap portion (), is present in the specific region Lforming the low-laser-light-transmissible portion. Also disclosed is a resin joined body.

Resin joined body and method for manufacturing same

A case comprised of a metal-resin composite body having a connector including a terminal fitting, the connector being integrated with an opening of a wall of a case main body so that the connector sandwiches an edge of the wall. The connector is comprised of a base resin formed by injection molding so as to sandwich the wall. A separately-manufactured connector is welded to the base resin. Forming the base resin on the case main body provides a less complicated configuration of the case compared to a case where a connector is formed directly to the case main body.

Metal-resin compound member

A circuit board case including: a cover that includes a cover front wall and a rise wall connected to the cover front wall, the cover being attachable to an attaching object at a position on the rise wall opposite the cover front wall; and a case that houses a circuit board and includes a case front wall and a first wall surface oriented toward a direction opposite the case front wall, the case being housed in the cover such that the case front wall opposes the cover front wall. A fitting that engages the first wall surface is formed in the rise wall of the cover so as to urge the case toward the cover front wall and thus hold the case within the cover.

Circuit board case

A mass flow sensor includes a semiconductor substrate , an insulating thin film , heaters and , temperature measurement resistors and , and a protective layer . The heaters and are formed on the surface of the insulating thin film , and are provided adjacently such that the heater is provided upstream the heater and the heater is provided downstream the heater . A cavity is formed below the heaters and , and the heaters are thermally insulated from the remaining portion of the semiconductor substrate. The temperature measurement resistors and are formed on the top surface of the insulating thin film , and are provided at opposite sides of the heaters and , such that the resistors are aligned with respect to the flow passage of a fluid. In the mass flow sensor and the mass flowmeter including the sensor, the flow rate and flow direction of a fluid can be detected by means of merely the heaters and , which are active elements. Therefore, the sensor and the flowmeter exhibits high-speed response with respect to change in the flow rate of the fluid.

Mass flow sensor and mass flowmeter comprising the same

A split-flow-type flowmeter includes a detection element disposed to face a flow path thereof and a venturi structure formed within a flow path in the vicinity of the detection element and adapted to throttle a flow directed toward the detection element to thereby reduce disturbance of the flow. The venturi structure is disposed in opposition to the detection element within the flow path and includes a protrusion protruding toward the detection element within the flow path of the split-flow-type flowmeter.

Split-flow flowmeter with a profusion facing the detection element

A split-flow-type flowmeter in which an end portion of a flow splitter tube is inserted into a main-flow pipe having a diameter D. A flow splitter tube includes a U-shaped split-flow passage . A detection element is disposed at a bottom portion (not shown) of the U-shaped split-flow passage . The split-flow passage assumes a flow path structure symmetrical with respect to a plane passing through the detection element. A flow inlet and a flow outlet of the split-flow passage face in mutually opposite directions along the flow direction of the main-flow pipe and open symmetrically at the same position on the flow cross section of the main-flow pipe . In order to divert into the split-flow passage a portion of relatively high flow rate of flow from the main-flow pipe , the center of opening of the flow inlet /flow outlet is positioned between the center of the flow cross section of the main-flow pipe and an average-flow-velocity position at which flow in the main-flow pipe is of an average flow velocity, as observed on the flow cross section of the main-flow pipe

Split-flow-type flowmeter

A flow measurement device is disclosed, in which an accumulation of pollution substance onto a detection element is prevented, and which can measure a reverse flow similarly to a normal flow. On both ends of an outer wall outer peripheral portion of a divided flow pipe having a &OHgr;-shape pipe passage, there are oppositely formed an inlet port and an outlet port , which open in faces orthogonal to a flow direction of a main flow M that is a detection object. Within the divided flow pipe , by a curved partition , plural branch flow passages mutually branching and joining in the divided flow pipe are formed. Inside both end portions of the outer wall , undulation portions are formed so as to clog an inlet and an outlet of the outer peripheral side branch flow passage and, by this, throttles are formed respectively in a flow passage between the inlet port and the inlet of the branch flow passage and a flow passage between the outlet port and the outlet of the branch flow passage . In a bottom portion of the outer wall of the divided flow pipe , a detection element is attached so as to be exposed to a flow in the outer peripheral side branch flow passage and, against its detection face, a down flow DW further divided from a divided flow D obliquely impinges.

Flow rate and flow velocity measurement device

A flow rate and flow velocity measurement device. A part of a flow in a main flow pipe which is a detection object, is introduced into a passage of a divided flow pipe and becomes a flow The divided flow pipe has a curved portion or rather an inverted arc portion in which the flow is abruptly changed in direction or rather inverted by protuberances formed preferably in symmetry in upstream and downstream sides of the curved portion Outside the main flow pipe there is disposed on the bottom portion of the curved portion of the divided flow pipe a detection element fixed to a support body while protruding preferably 0.05-0.3 mm from flow passage faces in the vicinity thereof. An opposed face opposite to the detection element protrudes toward the detection face so as to throttle the passage and to accelerate a flow speed at the element. Thus, in the curved portion from the flow a down flow is constantly formed obliquely impinging against the detection face of the detection element improving flow measurement accuracy within a wide flow speed range.

Flow measurement device for measuring flow rate and flow velocity

A flow rate and flow velocity measurement device has a divided flow pipe ( ) which is attached so as to be orthogonal to an intake pipe ( ) of an engine, and into which a flow in the intake pipe ( ) is introduced, an inlet plate ( ) which extends in a direction orthogonal to a flow direction in the intake pipe ( ) and forms a U-shape form pipe passage in the divided flow pipe ( ) and a detection element ( ) which is disposed so as to be exposed to a flow in the divided flow pipe ( ) outside the intake pipe ( ) and detects a flow rate and a flow velocity, wherein one end of the inlet plate ( ) protrudes into the intake pipe ( ) while passing a top opening of the divided flow pipe ( ), and the divided flow pipe ( ) has a flow passage structure symmetrical with the detection element ( ) being made a center, so that an equivalent detection element ( ) output is obtained in regard to both cases in which a fluid flows through the intake pipe ( ) in a normal direction and a reverse direction.

In the vehicle-lamp lighting-on device, a body case has a connection opening formed in the front end thereof. A lighting-on transformer is disposed within the body case. The transformer includes a core housing with an iron core and a coil bobbin with a secondary coil wound thereon. The connection opening of the body case is shielded at the front end of the lighting-on transformer. A socket for receiving a vehicle discharge lamp includes a high-voltage terminal and low-voltage terminals. When the socket is inserted into the connection opening of the body case, the high-voltage terminal of the socket is connected to the high-voltage side terminal of the lighting-on transformer, and the low-voltage terminals are connected to the low-voltage side terminals. The connection opening of the body case is shielded by the front surface (made of insulating material) of the lighting-on transformer. The vehicle-lamp lighting-on device can be completed by merely attaching the socket to the assembly of the lighting-on transformer and the body case. Therefore, the assembly of the device is easy. Further, the height of the vehicle-lamp lighting-on device is reduced overall since there is no need to form a wall corresponding to the shielding member in the body case.

Vehicle-lamp lighting-on device

In a high-voltage transformer, an insulating ring is placed on and along the inner surface of the core housing, and gaps are formed between the tips of the flange-like plates of the coil bobbin and the inner side of the insulating ring. With such a construction, the gaps and the insulating ring are provided between the coil bobbin and the inner wall of the core housing, so that the flange-like plates of the coil bobbin do not come in contact with the inner surface of cylindrical wall of the core housing. Therefore, a surface distance of the coil bobbin ranges to a contact surface of the coil bobbin where it comes in contact with the front wall of the core housing. The surface distance is elongated. The voltage drop by the creepage discharge does no occur.

Growing community of inventors

Aichi, Japan

Yoshihiko Kohmura