Abstract: A tape cassette that includes a box-shaped cassette case whose outline being defined by a bottom wall, a top wall, and a side wall and including a plurality of corner portions, at least one tape contained within a tape containment area defined within the outline, a pair of cavities extending from the bottom wall and being provided between the tape containment area and the outline at opposite ends of a diagonal line connecting one of the corner portions to another of the corner portions, and a side face indicator portion provided in the side wall, indicating a type of the tape, and including a plurality of indicator portions disposed in a pattern in accordance with the type of the tape, each of the indicator portions being one of a switch hole and a surface portion.

Abstract: An optical semiconductor device according to the present disclosure includes: a first-conductivity-type semiconductor substrate having a projecting portion; second-conductivity-type intermediate layers formed on both sides of the projecting portion above the semiconductor substrate; a stripe-shaped mesa structure formed of a first-conductivity-type first cladding layer, an active layer, and a second-conductivity-type second cladding layer, which are laminated above a surface including a top of the projecting portion so as to be centered at the projecting portion; buried layers formed on both sides of the mesa structure, to block current; and a second-conductivity-type contact layer formed at surfaces of the mesa structure and the buried layers.

Abstract: An image forming apparatus includes, an image forming portion configured to form a toner image on a sheet using printing toner and apply powder adhesive on the sheet, a fixing portion configured to heat the toner image formed on the sheet and the powder adhesive applied on the sheet by the image forming portion and fix the toner image and the powder adhesive to the sheet, and a bonding portion configured to bond the sheet with the powder adhesive by reheating the sheet having been heated by the fixing portion. The bonding portion is arranged above the image forming portion.

Abstract: A key guide structure for a keyboard instrument including a plurality of keys, for guiding each of the keys being pivotally moved in accordance with depression of the key. Each key includes a rib wall provided inside the key and extending between left and right side walls of the key in a left-right direction, and two left and right guide walls provided inside the key and extending forward a predetermined length from the rib wall with a predetermined spacing therebetween in the left-right direction. The keyboard chassis includes a plurality of key guides each provided on a key-by-key basis such that each key guide protrudes upward, each key guide being inserted between the two guide walls of each associated one of the keys from below and brought into sliding contact with the two guide walls.

Abstract: A keyboard device for a keyboard instrument includes a keyboard chassis, a key disposed on the keyboard chassis, and a key support mechanism which supports the key from below and causes the key to operate such that the key pivotally moves about a virtual pivot. A first arm rear-side connecting portion includes a connecting shaft extending in a left-right direction, and a second arm front-side connecting portion includes an engagement recess which is formed into a U shape open forward in side view and is engaged with the connecting shaft. An upper cushioning member and a lower cushioning member in sliding contact with an outer peripheral surface of the connecting shaft are mounted on the engagement recess in a state covering an upper portion and a lower portion of an inner surface of the engagement recess.

Abstract: A tape cassette that includes a box-shaped cassette case whose outline being defined by a bottom wall, a top wall, and a side wall and including a plurality of corner portions, at least one tape contained within a tape containment area defined within the outline, a pair of cavities extending from the bottom wall and being provided between the tape containment area and the outline at opposite ends of a diagonal line connecting one of the corner portions to another of the corner portions, and a side face indicator portion provided in the side wall, indicating a type of the tape, and including a plurality of indicator portions disposed in a pattern in accordance with the type of the tape, each of the indicator portions being one of a switch hole and a surface portion.

Abstract: A key for a keyboard device includes a resin key body and one or a plurality of woody boards attached along at least part of a pair of side portions of the key body. The key body includes an upper portion protrusion which extends along an upper end of each of the side portions and is formed continuous with the top portion, the upper portion protrusion protruding in a lateral direction of the key body. Each woody board is disposed such that an upper end surface thereof is in contact with a lower surface of the upper portion protrusion. The upper portion protrusion has a thickness dimension in a vertical direction smaller than a thickness dimension of the top portion of the key body.

Abstract: A keyboard device for a keyboard instrument, capable of causing a cushion to properly function while suppressing generation of noise when a hammer contacts the cushion. The hammer is vertically pivotally moved in a manner interlocked with key depression. The cushion is provided below the hammer. In a key-released state, a contact portion of the hammer is placed on the cushion, and when the hammer pivotally moved upward by key depression returns to its original position by key release, the contact portion contacts the cushion from above. The contact portion is formed to be inclined in the front or rear direction with respect to the upper surface of the cushion when contacting the cushion. The hammer has a deformation suppressing portion provided on the contact portion and/or its vicinity, for suppressing deformation of the cushion in the front-rear direction when contacting the cushion.

Abstract: A keyboard device for a keyboard instrument, including a key support mechanism assembled to a keyboard chassis, improved not only in the ease of assembly during manufacturing of the keyboard device but also in the ease of disassembly during maintenance of the same. The keyboard device includes a keyboard chassis, a key disposed on the keyboard chassis, and a key support mechanism which supports the key from below and causes, upon depression of the key, the depressed key to operate such that the key pivotally moves about a virtual pivot. The key support mechanism includes a first arm and a second arm which, when mounted on the keyboard chassis during assembly of the keyboard device, in a state where one of the arms is pivotally engaged with the keyboard chassis, the other can be mounted on the keyboard chassis while being connected to the one.

Abstract: A keyboard device for a keyboard instrument includes a keyboard chassis, keys disposed on the keyboard chassis, and a key support mechanism which is provided so as to support the keys from below, and causes, upon depression of a key, the depressed key to operate such that the key pivotally moves about a virtual pivot located rearward of a rear end of the key. The keyboard chassis includes a key stopper with which a rear end of an associated key moves into contact from below when the key returns to its original position before the key depression. The key includes a contact surface for contacting the key stopper in a key-released state, and a protrusion formed to protrude upward from the contact surface. At least one of the key stopper and the protrusion is disposed in plurality along a longitudinal direction of the key.

Abstract: A keyboard chassis has an upper limit stopper. A key extending a predetermined length in a front-rear direction is disposed on the keyboard chassis. A key support mechanism supports the key from below, and causes, upon depression of the key, the depressed key to operate such that the key pivotally moves about a virtual pivot located rearward of a rear end of the key. An upper limit position regulation portion provided on a lower portion of a front end of the key regulates an upper limit position thereof by contacting the upper limit stopper from below in a key-released state. A key rear-side stopper provided on the keyboard chassis is contacted by a rear end of the depressed key from below before the upper limit position regulation portion contacts the upper limit stopper, when the key returns to its original position before key depression.

Abstract: A keyboard device for a keyboard instrument includes a keyboard chassis having a plurality of partition walls, a plurality of keys, and a plurality of hammers pivotally moved along with key depression. Let-off members are removably mounted on one of each adjacent two of the partition walls and one of the hammers disposed between the adjacent two partition walls. Engagement portions are provided on the other of each adjacent two of the partition walls and the one of the hammers disposed between the adjacent two partition walls. The engagement portions are temporarily engaged with the let-off members during pivotal movement of the hammer along with depression of a key, to thereby add let-off feeling to touch feeling of the depressed key.

Abstract: A keyboard device for a keyboard instrument includes a keyboard chassis, a key disposed on the keyboard chassis, and a key support mechanism which supports the key from below and causes the key to operate such that the key pivotally moves about a virtual pivot. One of a first arm rear-side connecting portion and a second arm front-side connecting portion includes an engagement shaft extending in a left-right direction, and the other of them includes an engagement recess which has a U shape in side view and open in one of a front direction and a rear direction and is engaged with the engagement shaft. A cushioning member in sliding contact with an inner surface of the engagement recess is mounted on the engagement shaft in a state covering an outer peripheral surface of the engagement shaft.

Abstract: A keyboard device for a keyboard instrument includes a keyboard chassis, a plurality of keys arranged side by side in an upper portion of the keyboard chassis, and a plurality of hammers provided in association with the plurality of keys, respectively. Each hammer is pivotally supported, below an associated key, via a hammer support shaft on the keyboard chassis, and is pivotally moves in a manner interlocked with depression of the associated key. For a predetermined first hammer, which is associated with a predetermined first key of the plurality of keys, and a predetermined second hammer, which is associated with a predetermined second key of the plurality of keys, respective angles of pivotal movement, caused by key depression, of the first hammer and the second hammer are set to be different from each other.

Abstract: A key for a keyboard device includes a resin key body and one or a plurality of woody boards attached along at least part of a side surface of the key body. The key body includes an upper convex part which extends along an upper end of the side surface and is formed continuous with on upper surface of the key body such that it protrudes in a lateral direction of the key body, and a lower supporting protrusion which is disposed in the vicinity of a central portion or a lower end of the side surface such that it protrudes in a lateral direction of the key body and is opposed to the upper convex part. The woody board is sandwiched by the upper convex part and the lower supporting protrusion.

Abstract: A semiconductor optical element includes a first cladding layer; a second cladding layer formed in a ridge shape; and optical confinement layer interposed between the first cladding layer and the second cladding layer to propagate light, wherein the second cladding layer is configured with a ridge bottom layer; a ridge intermediate layer; and a ridge top layer in this order from the optical confinement layer, and the ridge intermediate layer is formed wider in cross section perpendicular to the optical axis—the light propagating direction in optical confinement layer—than the ridge bottom layer and the ridge top layer.

Abstract: A keyboard device for a keyboard instrument includes a plurality of key support mechanisms each provided in a state engaged with a keyboard chassis and supporting an associated key from below, for causing, upon key depression, the depressed key to operate such that the key pivotally moves about a virtual pivot located rearward of a rear end of the key. Each key support mechanism includes first and second arms each extending a predetermined length in a front-rear direction and configured to be swingable. The first and second arms are pivotally and slidably connected to each other. A rear-side connecting portion of the key includes a connecting body portion and a pair of engagement protrusions, and a rear-side connecting portion of the second arm includes two connecting arm portions having a bifurcated shape and formed with connecting holes.

Abstract: An insulating film (10) having an opening (11) is formed on a contact layer (7). A shape stabilization layer (8) having an inclined surface (9) is formed on the contact layer (7) in a peripheral portion of the opening (11). An underlying metal (12) covers an upper surface of the contact layer (7) exposed through the opening (11) and the inclined surface (9). A plating (13) is formed on the underlying metal (12).

Abstract: An optical semiconductor integrated element comprises a laser section and a photodetector section which are arranged on the same semiconductor substrate, the laser section and the photodetector section each have a light confining layer which confines light, a cladding layer, and a contact layer formed of an InGaAs layer or an InGaAsP layer, the light confining layer of the laser section is an active layer, the contact layer of the photodetector section is a light absorption layer, each cladding layer is a ridge structure having a shape in which a width at a side of the light confining layer is narrower than a width at a side of the contact layer in a cross-section which is perpendicular to the optical axis, and on a side surface of the light confining layer, the cladding layer and the contact layer, a semiconductor embedded layer is not provided.

Abstract: A semiconductor optical element includes a first cladding layer; a second cladding layer formed in a ridge shape; and optical confinement layer interposed between the first cladding layer and the second cladding layer to propagate light, wherein the second cladding layer is configured with a ridge bottom layer; a ridge intermediate layer; and a ridge top layer in this order from the optical confinement layer, and the ridge intermediate layer is formed wider in cross section perpendicular to the optical axis—the light propagating direction in optical confinement layer—than the ridge bottom layer and the ridge top layer.