Abstract: A photo-detecting device includes a first semiconductor layer with a first dopant, a light-absorbing layer, a second semiconductor layer, and a semiconductor contact layer. The second semiconductor layer is located on the first semiconductor layer and has a first region and a second region, the light absorbing layer is located between the first semiconductor layer and the second semiconductor layer and has a third region and a fourth region, the semiconductor contact layer contacts the first region. The first region includes a second dopant and a third dopant, the second region includes second dopant, and the third region includes third dopant. The semiconductor contact layer has a first thickness greater than 50 ? and smaller than 1000 ?.

Abstract: A lock for securing a trailer hitch includes a latching member, a position-limiting assembly, and a housing. The position-limiting assembly includes first and second position-limiting members, a magnetic member, and a securing pin. The first position-limiting member is configured for detachable engagement with the latching member. The second position-limiting member is mounted in the housing, receives the magnetic member, and is slidably connected to the first position-limiting member via the securing pin in order to be moved to an engaged position and a disengaged position. When at the engaged position, the second position-limiting member is mounted to the latching member due to the magnetic member and thereby fixes the first position-limiting member in position. When at the disengaged position, the second position-limiting member is separate from an end portion of the latching member to allow detachment of the first position-limiting member from the latching member.

Abstract: A lock for securing a trailer hitch includes a latching member, a position-limiting assembly, and a housing. The position-limiting assembly includes first and second position-limiting members, a magnetic member, and a securing pin. The first position-limiting member is configured for detachable engagement with the latching member. The second position-limiting member is mounted in the housing, receives the magnetic member, and is slidably connected to the first position-limiting member via the securing pin in order to be moved to an engaged position and a disengaged position. When at the engaged position, the second position-limiting member is mounted to the latching member due to the magnetic member and thereby fixes the first position-limiting member in position. When at the disengaged position, the second position-limiting member is separate from an end portion of the latching member to allow detachment of the first position-limiting member from the latching member.

Abstract: A fastening device for fastening trailer connectors includes a hitch penetrating through the trailer connectors. The hitch has a first locating member detachably connected to the hitch for preventing the hitch from coming off the trailer connectors and a second locating member having a first combining portion and a second combining portion. The first combining portion is movably connected to the first locating member, so as to allow the second locating member to shift between a locked position and an unlocked position. At the locked position, the second locating member has the second combining portion fixed to the hitch by a fixing member so as to hold the first locating member in engagement with the hitch. At the unlocked position, the second locating member has the second combining portion removed from the hitch so as to allow the first locating member to be detached from the hitch.

Abstract: A lock for steering wheels of vehicles includes a seat with an aperture formed at one end to receive a detent tube. The detent tube has a flute to hold an inner lining. The inner lining has a third pin hole. A latch bar is provided and insertable into a first holding hole of the detent tube and a second holding hole of the inner lining. The third pin hole is insertable by a third pin to anchor the latch bar. The latch bar can clamp two sides of a reinforced spoke of a steering wheel. The invention can be assembled quickly and easily, and provide improved theft-thwarting effect, and is adaptable to various steering wheels installed on varying locations of vehicles in different countries.

Abstract: A lock for steering wheels of vehicles includes a seat with an aperture formed at one end to receive a detent tube. The detent tube has a flute to hold an inner lining. The inner lining has a third pin hole. A latch bar is provided and insertable into a first holding hole of the detent tube and a second holding hole of the inner lining. The third pin hole is insertable by a third pin to anchor the latch bar. The latch bar can clamp two sides of a reinforced spoke of a steering wheel. The invention can be assembled quickly and easily, and provide improved theft-thwarting effect, and is adaptable to various steering wheels installed on varying locations of vehicles in different countries.

Abstract: A lock device includes a lock head, a lock case, a cap, and a lock shaft unit. The lock head is inserted into the lock case. The lock case is provided with an anti-dust cover which is rotatable with respect to the cap. The lock shaft unit is pivotally connected to the lock case, allowing the lock shaft unit to rotate in 360 degrees with respect to the lock case.

Abstract: A lock device includes a lock head, a lock case, a cap, and a lock shaft unit. The lock head is inserted into the lock case. The lock case is provided with an anti-dust cover which is rotatable with respect to the cap. The lock shaft unit is pivotally connected to the lock case, allowing the lock shaft unit to rotate in 360 degrees with respect to the lock case.