79results about How to "Contact state is stable" patented technology

The invention relates to a pressing-fastening switch capable of reducing hanging force applied on a standing section of a movable contact from an adhering piece when pressing the movable contact. The switch is provided with a movable contact (4) always conducting with a circumjacent fixed contact (3) and selectively conducting with a central fixed contact (2), and an adhering piece (5) capable of holding the movable contact (4) in a housing (1) in counter revolution manner, the movable contact (4) comprises a swelling section (4a) capable of reversing, a standing section (4b) formed on periphery of the swelling section (4a), the adhering piece (5) is provided with a through hole, such as a circular hole (5a) on position corresponding with the swelling section (4a) of the movable contact (4), the adhering piece (5) is plastered on the movable contact (4) and the housing (1), such that the periphery section (5a1) of the circular hole (5a) is at position nearer the swelling section (4a) than that of pressing-curing starting point (4ba) of the periphery section of the standing section (4b) and the swelling section (4a).

A hermetic sealing device having a side lip coming into slidable tight contact with a partner member such as a slinger in which contact state of the side lip can be stabilized and sliding resistance of the side lip can be reduced when lip tightening margin becomes maximum. The contact surface (6c) at the contact part (6a) of the side lip (6) has a cross-section of a straight shape in a free state. The noncontact part (6b) of the side lip (6) is provided with a grease holding portion (11) for holding grease being supplied to the contact part (6a). The grease holding portion (11) provided at the noncontact part (6b) of the side lip (6) is arranged at a position becoming the boundary between the contact part (6a) and the noncontact part (6b) when the width (W 1 ) of the contact part (6a) and lip tightening margin become maximum. The grease holding portion (11) consists of an annular groove (12) or a radial groove.

The present invention provides a push-button switch with high contact reliability, which provides a desired operation feeling, and prevents the invasion of dusts and the like to stabilize the contact state between a movable contact and a fixed contact when a rubber spring is pushed to perform the verse operation. The push-button switch is characterized in having: a housing having a housing part, fixed contacts fixed in the housing part, a movable contact arranged opposed to the fixed contacts, and a rubber spring having a lower end peripheral edge part in the holding part bendable skirt part provided in a space formed together with an upper end pressing surface part, and contacts/disconnects the movable contact to/from the fixed contact due to the bending of this skirt part. The lower end peripheral edge part of the rubber spring and opposed faces of a housing wall part of the housing 1 having this lower end peripheral edge part held therein are formed of inclined faces or arc faces each opening from the under face side toward the top face side.

The invention discloses a beat-type electromagnetic relay used for high-voltage direct current. The beat-type electromagnetic relay comprises a connecting plate, a first movable spring plate, a second movable spring plate, a first static conducting plate, a second static conducting plate, a beat-type drive assembly and a pushing plate. The connecting plate is provided with a first conducting plate and a second conducting plate, each of the first movable spring plate and the second movable spring plate is provided with a fixed end and a free end, the fixed end of the first movable spring plate is fixed onto the first conducting plate, the free end of the first movable spring plate is connected with the pushing plate, the fixed end of the second movable spring plate is fixed onto the second conducting plate, and the free end of the second movable spring plate is connected with the pushing plate; the pushing plate is used for driving the free end of the first movable spring plate and the free end of the second movable spring plate to be connected or disconnected with the first static conducting plate and the second static conducting plate respectively; and the beat-type drive assembly is used for driving the pushing plate to perform a reciprocating motion. The beat-type electromagnetic relay used for high-voltage direct current disclosed by the invention has the advantages of simple structure, low price, cost reduction and the like.

An oil seal (1) has a seal lip (6) in slidable intimate contact with the circumferential surface of a mating member, a slope (7) on the side of sealed fluid and a slope (8) on the side opposite to the sealed fluid that are provided on the seal lip (6), and a screw section (9) provided on the slope (8) on the side opposite to the sealed fluid and performing a function of pushing back the sealed fluid by a pumping effect induced by rotation of the mating member. The oil seal (1) has low torque characteristics based on fluid lubrication, and such characteristics are achieved by increasing the thickness of an oil film on sliding surfaces. An intermediate surface (10) is provided between the slopes (7, 8), and an oppositely threaded screw section (11) for performing a function of sucking the sealed fluid by a pumping effect induced by rotation of the mating member is provided on the intermediate surface (10). The oppositely threaded screw section (11) on the intermediate surface (10) is provided in such a way that the screw section (11) does not reach the boundary (13) between the intermediate surface (10) and the slope (8), and this provides a threadless region that lies in the entirecircumference between the screw section (11) and the boundary (13) and is in intimate contact with the circumferential surface of the mating member.

Provided is a vibration wave driving apparatus which can restrain increases in the number of components and in necessary space and which can maintain a stable contact state of frictional surfaces of a vibrator and a driven body.

A temperature detection module includes a thermistor configured to detect the temperature of an electric cell, a thermistor electrical wire drawn from the thermistor, a thermistor holding portion configured to hold the thermistor movably in a direction in which the thermistor comes into contact with and separates from the electric cell in a form in which the thermistor is biased to move toward the electric cell, and an electrical wire routing path in which the thermistor electrical wire is routed in one direction. The electrical wire routing path is provided with a holding means for holding a midpoint of the thermistor electrical wire that is drawn from the thermistor and routed along the electrical wire routing path in a form in which a drawing end of the thermistor electrical wire is provided with an excess length portion having a predetermined length in order to allow movement of the thermistor.

A movable contact point according to the present invention includes a dome-shaped portion protruded upwardly at its center portion and at least three protrusions formed, on the dome-shaped portion, to protrude downwardly at positions which are evenly spaced apart from the center position of the dome-shaped portion, wherein the protrusions are formed to have a quadrangular-pyramid shape protruding downwardly and having a spherical-shaped apex portion.

Provided is a reciprocating sealing device shaped so that volume absorbing performance is improved, preventing full-surface contact of the packing from readily occurring even when there is an increase in internal pressure, and therefore an excellent sealing performance can be obtained. In order to achieve this purpose, the reciprocating sealing device is a sealing device in which a packing is mounted on a mounting groove provided to one of two members that perform a reciprocating motion relative to each other and the packing is brought into intimate contact with the other member to obtain a seal between the two members. The packing is provided with an annular base part, a stationary-side lip, and a sliding-side lip. A pack ring having a lower hardness than that of the packing is interposed between the annular base part and the groove side surface of the mounting groove. A pack ring forms a space region between the pack ring and the other member. The annular base part is shaped so that the heel part has an arc-shaped or tapered cross-section and the annular base part does not protrude beyond an extension line of a peripheral surface of the sliding-side lip in a free state. The edge surface of the annular base part is provided with a flat part within the range at which contact is made with the pack ring.

The invention discloses a tube-shell type heat exchanger with a super-hydrophobic/hydrophilic surface. The tube-shell type heat exchanger comprises a shell, a first tube plate, a second tube plate, afirst end socket, a second end socket, and a heat exchange tube bundle arranged in the shell. The heat exchange tube bundle communicates with an inner cavity of the first end socket and an inner cavity of the second end socket. A patterned surface in a certain geometrical shape covers the surface of the heat exchange tube bundle, and super-hydrophobic areas and super-hydrophilic areas are distributed on the patterned surface at intervals. A first wave-shaped transverse plate and a second wave-shaped transverse plate which are arranged in parallel in the length direction and staggered by a certain distance are arranged in the shell. A baffle plate is arranged between the first wave-shaped transverse plate and the second wave-shaped transverse plate. The tube-shell type heat exchanger is simple in structure and easy to maintain, by the adoption of the super-hydrophobic/hydrophilic surface coating structure, the heat transfer coefficient of the tube bundle can be remarkably increased, andthe heat transfer effect is reinforced; and meanwhile, the pressure drop and flowing resistance are reduced to the greatest extent, flowing dead zones are eliminated easily, the heat exchange area isincreased, the heat exchange efficiency is improved, and the tube-shell type heat exchanger is resistant to high temperature and high pressure, even in heat exchange and good in stability.