240 results about "Separated state" patented technology

The utility model relates to the technical field of electrical switches, in particular to an opening and closing device of a pole-mounted switch, which comprises a shell, a sliding rod, a crankshaft and a connecting rod. The linkage control device further comprises a driving mechanism, and the driving mechanism can drive the crankshaft to swing in a limited mode so as to drive the sliding rod to be switched between the upper limit position and the lower limit position, so that the pole columns are switched between the closed state and the separated state, and the linkage control device has the advantages that linkage control over the multiple pole columns is achieved through a mechanical structure based on the crank connecting rod principle; and the reliability and the convenience of opening and closing control of the pole are greatly improved. Due to the fact that linkage control is achieved, it can be guaranteed that the pole columns can be switched to the needed working state at the same time, and the use reliability and the on-off accuracy of the pole column module are greatly improved.

The invention relates to the technical field of AMT gearbox control, in particular to an AMT gearbox control method, system and equipment in a braking state and a medium, and the method comprises the steps that when a vehicle is in a braking deceleration state, the stepping duration of a brake pedal, the actual vehicle speed, the actual acceleration of the vehicle and the rotating speed of an engine are obtained; whether the braking intention of the driver is emergency braking or stable braking is judged based on the stepping duration of the brake pedal and the actual acceleration of the vehicle; and based on the braking intention, the gear of the AMT gearbox and the separation state of a clutch are controlled till braking is finished. Wherein the current gear is maintained during emergency braking, and a clutch is controlled to be separated according to an engine rotating speed threshold value; during stable braking, after the rotating speed of the engine meets the condition, whether downshift is conducted or not is judged according to the actual vehicle speed, and a clutch is controlled to be separated. The brake intention of a driver can be accurately recognized, differential control is executed, and therefore the brake efficiency is effectively improved, engine flameout is prevented, and the driving smoothness is improved.

The invention relates to the technical field of hybrid power vehicles, in particular to a clutch assembly for a hybrid power system, the hybrid power system, a control method and device of the hybrid power system, a vehicle and a storage medium. The clutch assembly includes: a power input shaft; the power input shaft is sleeved with the one-way clutch, the driving gear and the thrust transmission assembly. The one-way clutch comprises an inner ring assembly. The driving gear comprises a connecting shaft, and the outer side wall of the connecting shaft is used for being matched with the movable body of the inner ring assembly. The thrust transmission assembly is used for triggering the one-way clutch to rotate relative to the power input shaft so that the one-way clutch and the driving gear can be switched between the self-locking state and the separation state. The self-locking state means that the movable body abuts against the outer side wall of the connecting shaft; and the separation state means that a gap is formed between the movable body and the outer side wall of the connecting shaft. According to the clutch assembly disclosed by the invention, the required hydraulic pressure can be reduced, the switching efficiency of series-parallel connection modes is improved, the driving and riding comfort is improved, and the dragging and friction loss can be reduced.

The utility model provides a sliding uncovering assembly and a sealing tank, the sliding uncovering assembly comprises a tank body, a cover body and a sliding piece, and the tank body is used for containing objects; the cover body is arranged on one side of the tank body and can cover or be separated from the tank body; the sliding piece is connected to the cover body in a sliding manner; the sliding part drives the cover body to clamp or loosen the tank body in the sliding process, the cover body is clamped with the tank body so that the covering state of the cover body and the tank body can be maintained, the cover body loosens the tank body so that the separation state of the cover body and the tank body can be maintained, and the tank body can be opened by the cover body, so that the cover body can be opened from the tank body in a sliding mode; the cover body is prevented from being opened from the tank body in a turnover mode, and the operation convenience of the sliding cover opening assembly is improved.

The utility model relates to the technical field of walking mechanical equipment, and particularly discloses a cab turnover assembly and engineering mechanical equipment, when the engineering mechanical equipment provided with the cab turnover assembly is overhauled, a locking assembly is switched to a separation state, at the moment, a cab can be driven to rotate around a pivot shaft relative to a frame, and the cab is turned over. When the included angle between the cab and the frame is the first preset included angle, the fixing piece fixes the included angle between the cab and the frame to be the first preset included angle, and at the moment, a worker can overhaul equipment below the cab. The included angle between the cab and the frame is fixed to be the first preset included angle through the fixing piece, the cab is prevented from being excessively turned over or moving in the unexpected direction, and then the safety and stability of engineering mechanical equipment are improved.

The utility model provides a kind of foaming forming die die changing cooperation mechanism, including die changing device, foaming mould box and mould box clamp, mould box clamp includes upper clamp and lower clamp, foaming mould box includes upper die and lower die, first lock pin connecting mechanism and second lock pin connecting mechanism are respectively equipped between upper clamp and upper die and between lower clamp and lower die, die changing device includes device frame, device frame is also equipped with die changing assembly, first lock pin connecting mechanism and second lock pin connecting mechanism both have locking connection state and unlocking separation state, when being in locking connection state, upper clamp and upper die, lower clamp and lower die are connected as a whole, when being in unlocking separation state, upper clamp and upper die, lower clamp and lower die are disconnected, die changing assembly can drive first lock pin connecting mechanism and second lock pin connecting mechanism synchronous switching between locking connection state and unlocking separation state. The utility model can save artificial cost, improve die changing efficiency.

The invention discloses a clutch, a transmission device, box equipment and a refrigerator. The clutch comprises a driving piece, a driven piece and a transmission assembly. The driven piece comprises an output part and a matching part fixedly connected with the output part, and the matching part is provided with a containing groove. The transmission assembly comprises a rotating piece rotationally arranged in the containing groove, a clutch piece in transmission fit with a transmission piece, and a transmission piece fixedly connected with the driving piece. And the clutch piece is movably arranged on the rotating piece, has a transmission state in transmission fit with the matching part and a separation state separated from the matching part, and can be reset to the separation state. The transmission part can rotate relative to the rotating part along with the driving part so as to push the clutch part to be in a transmission state. According to the clutch, the transmission device can be applied to meet the intelligent opening and closing requirements of the refrigerator, manual opening and closing operation of a user is not interfered, meanwhile, the structure is simple, and the production cost can be reduced.

The invention discloses a telescopic four-axis wind power blade transportation semitrailer, and relates to the technical field of wind power blade transportation semitrailers, the telescopic four-axis wind power blade transportation semitrailer comprises a shell, a sleeve is slidably connected to the interior of the shell, a sliding block is slidably connected to the interior of the sleeve, and a fixing plate is fixedly connected to the end, close to a tractor, of the sliding block; a round hole is formed in the outer side, close to the fixing plate, of the shell and completely penetrates through the shell, the sleeve and the sliding block in the thickness direction of the shell, an electromagnetic block is slidably connected into the round hole, a fixing ring is fixedly connected to the outer side, close to the round hole, of the shell, and an elastic plate is fixedly connected to one end of the electromagnetic block. According to the telescopic four-axis wind power blade transportation semitrailer, under the elastic force action of the elastic plates on the two sides, the electromagnetic block moves in the direction away from the sliding block, at the moment, the shell, the sleeve and the sliding block are in a free separation state, an operator can adjust the total length of the semitrailer body according to the length of a wind power blade, and the loading requirements of goods of different specifications are met.

The anti-jamming lock cylinder comprises a lock shell, a lock container installed in the lock shell and a tail ruler assembly connected into the lock shell, a clutch assembly enabling the lock container to be separated from or combined with the tail ruler assembly is arranged between the lock container and the tail ruler assembly, and a key hole is formed in the lock container; when the key is not inserted into the key hole, the tail ruler assembly is separated from the clutch assembly and the lock cylinder; after the key is inserted into the key hole and gradually pushes the clutch assembly to enter the tail ruler assembly, the key is rotated, the lock container, the clutch assembly and the tail ruler assembly can coaxially and synchronously rotate, and the clutch assembly is in circumferential limiting fit with the lock container and the tail ruler assembly through a circumferential limiting structure. Due to the effect of the clutch assembly, the tail ruler assembly and the lock cylinder are in a separated state, even if foreign matter invades the key hole and blocks the key hole, the tail ruler assembly can still idle, motor burning or part damage caused by the foreign matter of a traditional lock cylinder is effectively avoided, and meanwhile the problem that indoor unlocking cannot be achieved due to the fact that a user forgets to pull out a key is solved.

The invention discloses a vertical axis wind turbine integrated with auxiliary motor starting, and belongs to the technical field of wind power generation. Comprising a base, a generator is fixedly connected to the right side of the upper surface of the base, an outer disc is fixedly connected to the top end of the output end of the generator, a blade assembly is fixedly connected to the upper surface of the outer disc, a transmission assembly is fixedly connected to the left side of the upper surface of the base, and a fluted disc is fixedly connected to the outer side wall of the outer disc. The transmission assembly is in meshed connection with the fluted disc; through the exquisite design of the transmission assembly, the bottleneck of low-wind-speed starting of traditional equipment is effectively broken through, and the applicability and practicability of the equipment are remarkably improved. In the initial state of the equipment, the electric telescopic rod on the base is in an extending state, the transverse block stops at the initial position of the side groove, the sliding block is located at the tail end of the sliding groove, the auxiliary gear and the fluted disc are kept in a separated state, and interference between components in a non-working state is avoided.

The utility model discloses a masonry structure jacking device, masonry structure jacking device sets up between target wall and base, including underpinning subassembly, support subassembly, jacking assembly and main control unit, underpinning subassembly detachable connection in target wall near the one side of base, support subassembly includes detachable connection's first support plate and second support plate, and jacking assembly includes several groups of hydraulic lifting element, and hydraulic lifting element is in working condition, and first support plate and second support plate are in the separate state, guarantee hydraulic lifting element normal jacking work, when hydraulic lifting element is in non - working condition, first support plate and second support plate are in the connection state, and the target wall and base are supported, improve the effective stroke of hydraulic lifting element, can continue jacking work, and the component continues to support the target wall and base in the whole process, and the target wall does not appear the problem of falling back, realizes the target wall step by step advancement undisturbed synchronous jacking.

A terminal fitting (10) connected to a core wire (83) exposed from a covering part (82) at the tip of an electric wire (81) is provided with: a connection member (11) having a contact part (11B) into which the core wire (83) is inserted, the contact part (11B) being contactable with the core wire (83); and a sliding member (12) attached to the connecting member (11) so as to be slidable in the front-rear direction. The sliding member (12) can slide between a first position in which the contact part (11B) is in a separated state from the core wire (83) and a second position in which the contact part (11B) is in a contact state with the core wire (83). The sliding member (12) has a holding portion (12B) that covers the core wire (83) and holds the tip portion of the covering portion (82) in a state where the sliding member (12) is disposed at the second position.

The present invention discloses a magnetically assembled golf club bag head frame including a head frame body and a top annular piece. A clamping groove is provided on a side wall of the head frame body. A clamping joint is provided on a side wall of the top annular piece. The clamping groove is provided with a magnet groove in which a first magnet is provided. The clamping joint is provided with a magnet groove in which a second magnet is provided. During transportation, the golf club bag is a semi-finished product, a bag body is connected to the top annular piece, and the top annular piece and the head frame body are in a separated state.

The utility model discloses an unlocking prompt assembly and injection device, wherein the unlocking prompt assembly comprises a trigger key, a shell and a knob; the trigger key is accommodated in the shell and has an abutting state and a separation state with the knob; the knob is partially accommodated in the shell, is clamped with the shell and can rotate relatively, and the outer wall of the knob is provided with a first matching part; the shell is provided with an accommodation space, the shell is provided with a locking mark and an unlocking mark, the second matching part is arranged on the inner wall of the shell and corresponds to the locking mark and the unlocking mark, the knob is in interference fit with the shell through the first matching part or the second matching part, the knob is deformed radially, and the first matching part can rotate between the locking mark and the unlocking mark. The unlocking prompt assembly and the injection device have the advantages of simple structure, reduced number of parts and components, simplified assembly process, locked trigger device, prevented mis-triggering, produced sound feedback and visual feedback simultaneously during use, improved operation convenience, and provided better safety protection.

The mold demolding mechanism for walnut cake forming comprises an annular elastic wall and a circular elastic bottom, a forming cavity is formed between the annular elastic wall and the circular elastic bottom, the annular elastic wall and the circular elastic bottom deform during demolding, the annular elastic wall and the circular elastic bottom move relative to a walnut cake, and adhesion is avoided; when the forming cavity rotates to the bottom along with the forming roller assembly, the driving assembly actively drives the annular elastic wall to expand towards the periphery and actively drives the circular elastic bottom to move in the axis direction of the forming roller assembly. The mold has the beneficial effects that through the design of the forming roller assembly and the pressing roller, mold closing and mold opening operation is carried out in a rolling mode, and the production efficiency is greatly improved; through the arrangement of the driving assembly, the annular elastic wall and the circular elastic bottom, the annular elastic wall and the circular elastic bottom can deform when the walnut cake is demolded; at the moment, the walnut cake is separated from the annular elastic wall and the circular elastic bottom, and the walnut cake falls down under the action of gravity.

The utility model discloses a head shaking locking wrench which comprises a wrench head and a handle, the wrench head is rotatably connected with the handle, a clamping unit is arranged on the side, close to the handle, of the wrench head, a limiting unit is arranged on the side, close to the wrench head, of the handle, and the limiting unit is connected with a reset unit. The reset unit is arranged on the handle, the limiting unit is connected to the handle in a sliding mode, and when the limiting unit slides in the handle, the limiting unit can be switched between the clamped state and the separated state of the clamping unit. The utility model provides a head-shaking locking wrench which can enable the mode of locking the angle of a handle to be more convenient and quicker, reduces extra operation in the process and improves working efficiency.

The invention provides a padlock mechanism of an isolating switch, which comprises a base, a padlock piece and a main shaft, the main shaft is arranged on the base, the main shaft is used for transmitting rotary motion to actuate a contact system of the isolating switch to realize opening and closing, the padlock piece is arranged on the base in a sliding manner, and the padlock piece is arranged on the base. And the padlock piece can slide relative to the main shaft, so that the padlock piece and the main shaft can be switched from a separated state to a clamped state, and the main shaft is switched from a rotatable state relative to the base to a rotary motion which is limited. The padlock piece is clamped with the main shaft, so that the rotation of the main shaft relative to the base is limited, compared with the mode that the rotation of the main shaft is limited through a locking handle, the rotation of the main shaft relative to the base is directly locked through the padlock piece, the locking is more reliable, and the safety is higher.

The utility model discloses a door lock clutch mechanism and a door lock device. The clutch driver drives the clutch piece to move through the limiting connecting piece so as to switch the combination state and the separation state, and when the door lock clutch mechanism is in the clutch state, the limiting connecting piece can be kept connected with the clutch piece, so that the clutch piece is difficult to jump when the door lock clutch mechanism is knocked, the risk that the door lock is unlocked due to the fact that the door lock clutch mechanism is accidentally switched to the combination state can be reduced, and the safety of the door lock is improved. And the safety is improved.

The application discloses a split nut type separation mechanism based on memory alloy wire driving rotation unlocking, and the split nut has a folding state and a separation state. In the folding state, the split nut is limited in the radial direction by the inner circle of a rotating sleeve. When the separation mechanism is unlocked and separated, a separation driving part pushes the split nut to open radially along the guide groove of a guide disc. A rotation driving part is arranged between the rotating sleeve and a center positioning disc, a limiting structure for limiting the rotation of the rotating sleeve is arranged between the limiting part and the rotating sleeve, and the limiting part is connected with a limiting retaining part. The limiting part is connected with a memory alloy wire. The memory alloy wire drives the limiting part to move axially away from the rotating sleeve in the electrified state, and the limiting structure is released from the limitation. In the released state, the rotation driving part drives the rotating sleeve to rotate counterclockwise, and the rotating sleeve is released from the radial constraint on the split nut. Therefore, the unlocking and resetting are smooth, and the risk of jamming in the unlocking and resetting caused by the steel ball locking is avoided.

The invention relates to the technical field of railway vehicles, and provides a damping device and a railway vehicle. In the damping device, self-adaptive rigidity adjustment of a dynamic load is achieved through cooperation of a main spring assembly and an auxiliary spring, in a first-stage bearing range, a bearing connecting piece moves along with the main spring assembly and keeps a separated state from the auxiliary spring, and the main spring assembly elastically deforms independently to provide basic rigidity; in the second-stage bearing range, the bearing connecting piece further moves along with the increase of the load and abuts against the auxiliary spring, the auxiliary spring and the main spring assembly cooperatively deform to provide composite rigidity with higher supporting force, and therefore the damping requirements under different load working conditions are met. Through grading cooperation of the main spring assembly and the auxiliary spring, the low overall rigidity is kept in the low-load state, and vibration transmission is effectively reduced; higher composite rigidity is provided in a high-load state, excessive deformation of the floor is effectively restrained, automatic adaptation to different load working conditions is achieved, good balance is achieved between light load and heavy load, and safety and comfort are improved.

The utility model discloses an idling cabinet lock. The idling cabinet lock comprises a shell, a clutch assembly, a locking piece, a driving assembly and an anti-pinch assembly. The clutch assembly, the locking piece, the anti-clamping piece and the driving assembly are all arranged on the shell, the clutch assembly has a linkage state and a separation state, and the locking piece has a locking position enabling the clutch assembly to be in the linkage state and an unlocking position enabling the clutch assembly to be in the separation state; the driving assembly is used for driving the locking piece to move between a locking position and an unlocking position, the anti-pinch assembly comprises a first anti-pinch piece and a second anti-pinch piece, the first anti-pinch piece and the second anti-pinch piece are arranged on the two sides of a moving path of the locking piece, and the first anti-pinch piece and / or the second anti-pinch piece are / is in sliding contact with the locking piece. Through the arrangement, the problem that the equipment cabinet cannot be unlocked due to the fact that the clutch device cannot be clutched when some idle equipment cabinet locks are unlocked at present is solved.

When separating two workpieces within a chamber, the separation state between the two workpieces can be detected without opening the chamber. [Solution] In the peeling device, the chamber mechanism can change the relative position of the second chamber forming part to the first chamber forming part between the first and second positions while maintaining the combined state of the first and second chamber forming parts by utilizing the elasticity of the seal part. The peeling mechanism is a mechanism that enables the peeling of two workpieces that are bonded together in the chamber by growing a crack between their bonded surfaces. The mechanism generates a pressure difference on the front and back of either workpiece, using the internal pressure of the chamber, so that the bonded surface side of the workpiece becomes positive pressure, and grows the crack by expanding the area where this pressure difference is generated. The control device detects the peeling state between the two workpieces based on the output of a displacement sensor that detects the relative position of the second chamber forming part.

The utility model discloses an aerosol generating device. The aerosol generating device specifically comprises a shell, a shielding piece and a driving piece. Wherein the top wall of the shell is provided with an insertion hole for inserting a cigarette; the two shielding pieces are oppositely arranged and located in the shell, and each shielding piece comprises a shielding part and a connecting part; the driving part is slidably connected to the outer side wall of the shell, the driving part is in transmission connection with the two connecting parts, and the driving part slides in the first direction to drive the connecting parts to rotate, so that the two shielding parts rotate to be in a separated state and open the jack or the two shielding parts rotate to be in an abutting state and close the jack. According to the aerosol generating device, the problem that dust and water vapor enter the aerosol generating device to cause blocking of the shielding piece can be avoided, and the service life of the aerosol generating device is prolonged.

An assembling and tightening integrated mechanical arm comprises a connecting base. A rotating shaft and a bearing are arranged in the fixed sleeve, and the upper part of the rotating shaft is inserted into the connecting base; the first rotary brake device is arranged on the connecting base; one end of the lifting arm is connected with the fixed sleeve; the second rotary brake device is arranged at the other end of the lifting arm; the supporting rod is L-shaped, and the upper end of the supporting rod is connected with the second rotary brake device; the rotary joint is connected with the lower end of the supporting rod; the third rotary brake device is arranged on the outer side of the rotary joint; the clamping mechanism is arranged on the rotary joint; the tightening gun is arranged on the supporting rod; and a controller. According to the utility model, the clamping mechanism and the tightening gun are designed into a whole, so that the problem that nodes are all in a separated state in the working process of the existing power-assisted manipulator is solved, and an article needing to be assembled is carried or transferred to an assembling position and then is manually tightened by a tool or tightened by a tightening manipulator.

The utility model discloses a signal test system, which comprises a mounting seat and a test structure, and is characterized in that the mounting seat is provided with a mounting cavity and is suitable for bearing a piece to be tested; the test structure comprises a test assembly and a push-and-pull assembly, the push-and-pull assembly comprises a push-and-pull piece and a plurality of plug connectors, the push-and-pull piece is arranged on the mounting seat, the push-and-pull end of the push-and-pull piece faces the to-be-tested piece, all the plug connectors are arranged on the push-and-pull end of the push-and-pull piece, and the test assembly is arranged in the mounting cavity and electrically connected with all the plug connectors and the to-be-tested piece; under the action of external force, all the plug connectors have a plug-in state and a separation state, in the plug-in state, the push-pull end of the push-pull piece is suitable for driving all the plug connectors to be close to the to-be-tested piece and to be in plug-in connection with the to-be-tested piece, and in the separation state, the push-pull end of the push-pull piece is suitable for driving all the plug connectors to be away from the to-be-tested piece and to be separated from the to-be-tested piece. The signal testing system with the structure is beneficial to improving the signal testing efficiency of the to-be-tested piece.

The invention discloses a clutch, a transmission device, box equipment and a refrigerator. The clutch comprises a driving piece, a driven piece and a transmission assembly. The driven piece comprises an output part and a matching part connected with the output part, and the matching part is provided with a connecting part. The driving part and the driven part are rotatably arranged, and the driving part is provided with a spiral groove extending in the axial direction of the driving part. The transmission assembly comprises a transmission part movably arranged in the spiral groove and a clutch part in transmission fit with the transmission part. The clutch piece is arranged in a sliding mode relative to the driving piece in the axial direction of the driving piece and has a transmission state connected with the connecting part and a separation state separated from the connecting part. The clutch piece can be reset to the separation state, the transmission piece can rotate along with the driving piece so as to move along the spiral groove, and the clutch piece is pushed to the transmission state from the separation state. According to the clutch, the transmission device can be applied to meet the intelligent opening and closing requirements of the refrigerator, manual opening and closing operation of a user is not interfered, meanwhile, the structure is simple, and the production cost can be reduced.

The utility model provides a rotary compressor (1) and equipment using the rotary compressor (1), a compression mechanism part (30) is provided with a cylinder (31), a piston (32) configured in the cylinder (31) and blades (33) dividing the interior of the cylinder (31), a shaft (40) is provided with an eccentric part (42), a blade groove (36) configured with the blades (33) is formed on the cylinder (31), the eccentric part (42) is configured in the cylinder (31), the piston (32) is embedded with the eccentric part (42), and the blade groove (36) is embedded with the eccentric part (42). The vane (33) operates without leaving the piston (32), and by bringing the refrigerator oil and the working fluid into a two-phase separated state under a temperature condition of 25 DEG C, lubrication performance can be ensured and a good sliding state can be maintained even if liquid compression operation cannot be avoided.

A fixing module (1000) for fixing a battery assembly (3000) in place, and an electric device (2000). The fixing module comprises a support member (100) for supporting the battery assembly, and a clamping assembly (200); the clamping assembly comprises a plurality of clamping members (210) arranged at intervals on the support member in a first direction; at least one clamping member is movably arranged on the support member so that the clamping assembly can be switched between a clamping state and a separated state; in the clamping state, the plurality of clamping members are separately in contact with the battery assembly to fix the battery assembly; and in the separated state, at least one clamping member is separated from the battery assembly so that the battery assembly is detachable.

The utility model discloses a water inlet valve which comprises a water inlet valve body and a buoy assembly, the buoy assembly is provided with a connecting sleeve arranged outside the water inlet valve body in a sleeved mode, and a separable axial multi-stage positioning structure is arranged between the connecting sleeve and the water inlet valve body in a matched mode. The connecting sleeve is provided with an elastic buckle, a rotation stopping part is arranged on the peripheral wall of the water inlet valve body, the connecting sleeve rotates around the axis of the connecting sleeve so that the elastic buckle of the connecting sleeve can be clamped with or separated from the rotation stopping part, and in the separation state, the buoy assembly can slide in the axial direction of the water inlet valve body. And in the clamping state, rotation stopping and limiting are achieved on the connecting sleeve, and axial positioning is achieved through an axial multi-stage positioning structure matched between the connecting sleeve and the water inlet valve body. According to the utility model, the disassembly and the height adjustment of the buoy assembly can be realized by directly utilizing the structure between the connecting sleeve and the water inlet valve main body, so that the number of parts is obviously reduced, the production cost is effectively reduced, and the disassembly and assembly process of the attached map assembly is greatly simplified.

To prevent a lubricant from entering a sliding part between a charging roller and a separation holding member.SOLUTION: A charging roller including a rotation shaft and an elastic layer formed around the rotation shaft, the charging roller being in contact with the photosensitive member to charge the photosensitive member, a bearing rotatably holding the rotation shaft of the charging roller, a fitting portion rotatably fitted to the rotation shaft of the charging roller, and an engaging portion that rotates integrally with the fitting portion and is rotatable between an engaging position where the engaging portion engages with the rotation member of the photosensitive member and a releasing position where the engaging portion releases engagement with the rotation member of the photosensitive member, the space keeping member includes a projected portion provided between the engaging portion and the bearing so as to project from the engaging portion toward the bearing and provided at a position spaced from a rotation shaft of the charging roller with respect to a radial direction of the charging roller.SELECTED DRAWING: Figure 10