37results about How to "Easy positioning" patented technology

The utility model discloses a four -axis rotary table regulation structure relates to four -axis rotary table regulation technical field, and its technical scheme is: including lathe table, the bottom plate is equipped on lathe table top, and lathe table is connected with the bottom plate through bolt fixing, and the sliding slot is seted up in bottom plate one side, and the sliding block is equipped in the inside of sliding slot, and the fixed installation plate is equipped in the top of sliding block, and the rotary table body is equipped on the top of installation plate, and two adjusting assemblies are equipped on the top of installation plate, and the positioning assembly is equipped on the top of bottom plate, adjusting assembly includes adjusting block, and the beneficial effect is: the utility model discloses the cooperation of six -sided screw rod and adjusting block through the setting adjusting assembly, can realize the accurate adjustment of rotary table body position, and the position of adjusting block can be fine -tuned to the rotation six -sided screw rod, thereby accurately adjusting the position of rotary table body, ensures that rotary table can reach the ideal position accuracy, greatly improves the machining accuracy of lathe, satisfies the demand of high -precision machining.

This utility model relates to a parking handle mounting base, including a parking base fixing plate and a parking handle mounting plate. The parking base fixing plate has a mounting hole and a clearance groove; the parking handle mounting plate has a mounting surface with a clearance groove and a mounting hole. The mounting surface is bent in the same direction on both sides to form a support surface and a positioning surface, and the support surface is bent in the opposite direction to form the positioning surface. A slot is provided at the end of the positioning surface, and the positioning surface is fitted to the side of the parking base fixing plate near the clearance groove, with the positioning surface passing through the clearance groove and abutting against its inner wall. Both parts of this utility model are integrally molded, reducing the number of parts and processing steps, and optimizing the manufacturing process. Through the cooperative design of the positioning surfaces, the parking handle mounting plate is quickly and accurately positioned on the parking base fixing plate, effectively controlling the overall dimensions and hole tolerances.

The invention relates to medical instruments, in particular to an osteochondral transplantation device and a transplantation method thereof. A first blade part structure is arranged on a first positioning part in the positioning assembly; the whole osteotomy assembly is of a hollow rod-shaped structure, two or more axial gaps are evenly distributed in an osteotomy part, the outer diameter of the osteotomy part is equal to the outer diameter of the first positioning part, the outer diameter of a main rod body of the osteotomy assembly is smaller than the outer diameter of the first positioning part, and the length of a third outwards-expanded straight blade is 1 / 3-1 / 2 of the length of the axial gaps; the inner aperture of the bone taking part is smaller than that of other parts; the inner aperture of the bone taking part is equal to the outer diameter of the first positioning part; an arc where the outer surface of the peripheral positioning clamp of the transplantation assembly is located is equal to the outer diameter of the main rod body of the transplantation assembly; the inner diameter of the transplantation assembly is larger than that of the bone taking assembly; the osteotomy assembly performs osteotomy operation; the residual cutting assembly carries out residual cutting treatment; the bone taking assembly is used for taking new bone cartilage; and the bone cartilage to be transplanted is placed in the inner hole of the transplanting assembly. The method is high in transplantation success rate, short in operation time and beneficial to health recovery of patients.

The application provides a self-biting sectional pressing belt of a pressing belt conveyor and belongs to the technical field of conveying devices.The self-biting sectional pressing belt comprises a conveying belt mechanism and a pressing belt mechanism, the conveying belt mechanism and the pressing belt mechanism are in abutment, the pressing belt mechanism comprises a plurality of sectional belts, the sectional belts are provided with a female end and a male end along the width direction of the sectional belts, and the female end and the male end of two adjacent sectional belts are detachably connected.The self-biting sectional pressing belt has the advantages that after the sectional belt contacts the conveying belt, the closed treatment can be firstly realized, the sectional belt can press the conveying belt under the action of external pressure, the internal sealing state can be maintained at all times when the continuous angle and height change, and the sectional belts are assembled in a splicing mode, so that the replacement operation can be rapidly performed when the sectional belt is damaged.

The application relates to the technical field of tooling, and provides a tool for bolt disassembly. The tool is suitable for disassembling mounting bolts on a vehicle component, wherein the mounting bolts are located in mounting through holes on the vehicle component, and the tool comprises a socket, a screwing wrench and a positioning piece. The socket can be inserted into one end of the screwing wrench, and the socket can be driven to rotate in a preset direction by the screwing wrench; the positioning piece can be sleeved on the socket, and the sleeved positioning piece is matched with the mounting through hole, so that the socket is positioned to be combined with the mounting bolt, and the mounting bolt is screwed by the socket. The tool can facilitate the disassembly of the mounting bolts of the vehicle component located in a narrow space, and can improve the work efficiency of the disassembly of the vehicle component.

The utility model discloses a kind of tunnel primary support inverted arch arch cutting's scribe positioning tool, belong to tunnel engineering construction technical field.It includes symmetrical V type arrangement's left beveling positioning gauge and right beveling positioning gauge, vertical through and fixed in the middle part of two I-beam centerline alignment rod, bevel gauge connecting reinforcing bar connecting two middle regions, and respectively being located in two ends of span adjustable telescopic arm, telescopic arm is equipped with limit bolt, the V type end of left beveling positioning gauge and right beveling positioning gauge and the other end part is equipped with I-beam main positioning groove and I-beam auxiliary positioning groove respectively.The tool solves the problem of low precision, low efficiency, poor versatility of existing positioning mode, with the advantages of high positioning accuracy, simple operation, strong versatility, stable structure, suitable for cutting scribe positioning of tunnel primary support inverted arch arch.

The utility model relates to a battery flexible connector tab punching tool which comprises a base, a placing plate is arranged at the top of the base, two symmetrical supporting frames are arranged at the top of the base, a top plate is installed at the tops of the two supporting frames, two symmetrical fixing plates are further arranged at the top of the base, and the two symmetrical fixing plates are arranged on the top of the base. By moving the two positioning blocks, one sides of the two positioning blocks are aligned and attached to the two sides of the tab, and the fixing bolts penetrate through the limiting grooves formed in the positioning blocks and are matched with one of the two rows of fixing holes formed in the top of the containing plate, so that the two positioning blocks are fixed; therefore, the tab is positioned, deviation in the punching process is avoided, and meanwhile positioning operation is more convenient and faster.

The application discloses a flexible quick connector with a detection function and a detection method thereof, and the quick connector comprises a first test piece, a second test piece detachably assembled with the first test piece, a buckle piece elastically separating the abutting surface of the first test piece and the second test piece, and a sensor installed on the end surface of the first test piece; the first test piece and the second test piece are internally provided with a through airflow channel for air tightness detection; the buckle piece is internally provided with a buckle opening for adjusting the cross-sectional area of the airflow channel and limiting the butt joint pipeline; and the first test piece is internally provided with a detection hole communicating the sensor and the airflow channel. When the butt joint pipeline is inserted into the quick connector, the buckle piece positioning operation is more simple and convenient, the air tightness detection function can be realized, the position of the dustproof plug assembled on the butt joint pipeline can be detected, the quick connector is optimized in the assembled structure, and the multifunctional test requirement is met.

This utility model discloses an auxiliary positioning device for installing hot and cold water pipes, comprising: a positioning plate with mounting holes, the spacing of which is the same as the design spacing of the hot and cold water threaded elbows, and the diameter of the mounting holes being larger than the inner diameter and smaller than the outer diameter of the hot and cold water threaded elbows; a pad, disposed between the positioning plate and the wall, used to adjust the distance between the positioning plate and the wall and control the distance of the end face of the hot and cold water threaded elbow from the wall; a fixing member, used to pass through the positioning plate and the pad to fix the positioning plate and the pad to the wall; and a plug, the outer diameter of which is adapted to the inner diameter of the hot and cold water threaded elbow, the plug being inserted into the hot and cold water threaded elbow through the mounting holes. This application simplifies various positioning operations for hot and cold water threaded elbows, improves installation quality, and reduces project costs.

The utility model discloses a tool for overhauling a steam turbine bearing. The tool comprises a bottom plate, a mounting plate, a lifting mechanism and two sets of positioning mechanisms. One side of the bottom plate is arranged on the ground, the other side of the bottom plate is connected with one end of the lifting mechanism, the other end of the lifting mechanism is connected with the mounting plate, and the bottom plate and the mounting plate are arranged in parallel; each positioning mechanism comprises a side plate, a positioning plate and a moving assembly. The two side plates, the two positioning plates and the two moving assemblies are oppositely arranged. The two side plates are connected to the side, away from the bottom plate, of the mounting plate and located at the two ends of the mounting plate correspondingly. The two positioning plates are connected with the two side plates through moving assemblies correspondingly and are in sliding connection with the mounting plate. The two positioning plates are both configured to abut against the steam turbine bearing. The technical effect that the steam turbine bearing is more stable during overhauling is achieved, and the convenience of the steam turbine bearing during overhauling is improved.

The utility model relates to a water injection pump technical field, concretely relates to a portable miniature water injection pump device. Including the car body, the first motor and the pump body are fixed to the car body upper end, and the output shaft of first motor and the input shaft of pump body are connected through the shaft coupling, and one side of car body is fixed with the side plate, and the support rod is fixed to the side plate, and the support rod is perpendicular to the side plate, and the second motor is concentrically fixed to the end of support rod away from the side plate, and the output shaft of second motor is concentrically fixed with the turntable, and the central rod is rotatably connected to the turntable, and the long slot is set up on the turntable, and the sliding block is elastically slid in the long slot, and the sliding rod is fixed to the sliding block upper end, and the rotating sleeve is rotatably arranged on the sliding rod outside, and the water inlet hose passes between the rotating sleeve and the central rod. The utility model drives the turntable, sliding rod and rotating sleeve through the second motor, and realizes the automatic winding function of water inlet hose in combination with spring sliding block system.

The utility model provides a kind of positioning assembly, encapsulating device and encapsulating system, it is related to encapsulating technical field.The positioning assembly includes positioning member and clamping member.Wherein, positioning member is used to be connected with encapsulating wheel.Clamping member is slidably connected with positioning member along the axial direction of encapsulating wheel.Moreover, clamping member is used to position battery piece, so that battery piece corresponds with the glue hole of encapsulating wheel.Based on the setting of the sliding connection of the above-mentioned clamping member and positioning member, the manual adjustment of staff to battery piece can be reduced, so that the positioning operation of battery piece is more convenient, to reach the beneficial effects of saving time, reducing the labor intensity of operator, reducing error.

This invention relates to the field of automotive component structure technology, specifically to a high-braking lamp mounting structure and disassembly method. It includes a trunk lid and a high-braking lamp. The trunk lid comprises an inner panel and an outer panel. When the trunk lid is closed, the outer panel has a mounting groove recessed downwards in the Z direction at its X-axis front end. The high-braking lamp is mounted within the mounting groove, and when the trunk lid is closed, the X-axis front end of the high-braking lamp connects to the X-axis rear end of the rear windshield. A fixing structure for securing the high-braking lamp within the mounting groove and an arrangement structure for facilitating the installation of wiring harnesses on the high-braking lamp are provided between the inner panel, outer panel, and high-braking lamp. The high-braking lamp mounting structure of this application is very simple. The high-braking lamp is located outside the rear windshield, unobstructed, easy to install and disassemble, increases the storage capacity of the rear cargo area while increasing the luminous area of ​​the high-braking lamp, and has significant potential for widespread application.

This invention provides a reciprocating cutting tool. The reciprocating saw, as a reciprocating cutting tool, comprises: a rod-shaped slider (6) having a saw blade holding portion (138) for holding the saw blade; a slip shoe (229) capable of sliding along the extension direction (front-back direction) of the slider (6); a slip shoe locking mechanism (254) capable of locking the slip shoe (229); and a pin (240) capable of interfering with the slip shoe (229). The slip shoe locking mechanism (254) inhibits the sliding of the slip shoe (229) by locking it, and allows the slip shoe (229) to slide by releasing the locking. The pin (240) interferes with the slip shoe (229) sliding to a predetermined position. Accordingly, the positioning of the slip shoe in the reciprocating cutting tool exhibits superior durability, is less prone to movement or easier to operate during operation, and more reliably prevents slippage when pulled forward beyond the predetermined position.

A bearing seat positioning mechanism comprises a positioning base with an L-shaped cross section, a centering seat, a pull rod, a limiting block, a pressing seat and a top seat, the centering seat comprises a positioning disc assembled in a bearing hole of a bearing seat, the pressing seat comprises a pressing rod and two connecting rods, and the top seat comprises a seat body and a supporting bolt in threaded fit with the top of the seat body. The horizontal plane of the positioning base is fixedly installed on a milling machine table, one end of the pull rod is fixed to the vertical plane of the positioning base, and the other end of the pull rod extends in the horizontal direction, penetrates through the circle center of the positioning disc and the limiting block and is in threaded fit with the locking nut and a base body of the top base to be supported on the milling machine table. And the pressing rod is tightly pressed on the side face of the top of the bearing seat, so that the bearing seat is positioned. The device is simple in structure and low in machining cost, the bearing seat can be rapidly, efficiently and stably positioned, it is guaranteed that the side face where the length and the thickness of the bearing assembly end of the bearing seat are located is horizontal, and the milling requirement is met.

The utility model discloses a punching assistor, which belongs to the technical field of punching and comprises a main body part, at least two clamping parts are arranged on one side of the main body part, the length direction of the clamping parts is perpendicular to that of the main body part, a positioning part is arranged on one side, far away from the clamping parts, of the main body part, and a positioning block is arranged on the positioning part. According to the scheme, the clamping part can be used for clamping an object to be punched, the clamping part and the main body part are perpendicular to each other, it can be guaranteed that the clamping part clamps the object to be punched in the width direction, and then auxiliary positioning of the punching position is achieved in the length direction; and the positioning block on the positioning part can realize positioning on the object to be punched, so that the positioning precision of the punching assistor is ensured, and the punching quality is improved. In the use process, fixed-point punching can be achieved only by using the positioning part for positioning and then determining the length and width positions of the hole positions in the length directions of the main body part and the clamping part, and the punching efficiency is greatly improved.

This invention provides a cam bracket positioning and installation device and method for helicopter inclined beam components. In this device, a positioning block is installed in the middle of a positioning shaft. The positioning shaft and positioning block, when combined, are used for positioning the cam bracket. One end of the positioning shaft is assembled with a first adapter shaft, and the other end is assembled with a second adapter shaft. The first and second adapter shafts together are used for positioning the device on the inclined beam. The first and second adapter shafts can slide along the axis of the positioning shaft. A clamping nut is located below the second adapter shaft. A positioning pin and a plate nut are installed on the positioning block. The positioning block and the positioning shaft, and the first adapter shaft and the positioning shaft, are fixed by pins. The structure is simple and easy to operate. It can effectively position and clamp the cam bracket using the inclined beam joint hole as a reference, ensuring the installation accuracy of the cam bracket. The positioning operation between the device and the inclined beam joint is convenient, and the main structural components do not need to be completely disassembled during use, exhibiting good usability.

The utility model discloses a detection device based on 3D line laser camera, wherein, a kind of detection device based on 3D line laser camera, including workbench, support frame, transmission gear plate and top wheel assembly, workbench is used to support the plate piece of detection, the workbench is rotatably connected in support frame, transmission gear plate is slidably connected on the lower side of workbench, transmission gear plate is hinged with transmission plate between support frame, the support frame is hinged with adjusting electric cylinder between transmission plate, top wheel assembly is used to cooperate workbench overturn and work, the top wheel assembly is set in the lower side of workbench.The utility model technical scheme, to optimize work flow, also greatly reduce the work burden of worker.

This invention discloses a drilling fixture for a circular tube of a photovoltaic support, comprising: a positioning plate with a rotating shaft rotatably mounted on it; a drilling guide rail connected to the rotating shaft, with an angle locking mechanism between the drilling guide rail and the positioning plate; two circular tube clamps for holding the circular tube, fixedly connected to the positioning plate, the two circular tube clamps being coaxially arranged side-by-side with a predetermined distance between them, the two circular tube clamps being connected by a fixed bracket, and the positioning plate being fixed to the fixed bracket; and a mounting bracket for mounting the drilling tool, located between the two circular tube clamps, the mounting bracket being movably mounted on the drilling guide rail so that it can move along the drilling guide rail closer to and away from the circular tube clamps. This invention can improve drilling efficiency and accuracy.

The utility model discloses a structure adjustable's crowd space partition device relates to partition device technical field, including partition board main part, one side of partition board main part is fixed with first mounting bracket, one side of partition board main part is fixed with second mounting bracket, be provided with positioning mechanism, and the positioning of partition board main part assembly is conveniently completed, and compared with traditional partition device positioning operation simple and easy, and not easy to damage, can quick response demand change, realizes space as needed division or integration, can complete the quick positioning of assembly, is convenient for subsequent use bolt and completes fixed, realized the purpose that structure is easy to adjust, be provided with reinforcing mechanism, when partition board main part assembly positioning, conveniently complete the limiting and fixed of top of partition board main part assembly, plays the role of supplementary reinforcement, ensures that the structure is stable and does not loosen after the assembly of adjacent partition board main part.

The utility model relates to the field of bending machine plate control technology especially a kind of bending machine manual front and rear adjustment rear stop finger X2 axis mechanism, including rear stop finger mounting plate, first linear guide rail is fixedly assembled on rear stop finger mounting plate upper surface, X-axis main body is slidably assembled on rear stop finger mounting plate by first linear guide rail.The utility model relates to a kind of bending machine manual front and rear adjustment rear stop finger X2 axis mechanism, and rear stop finger can be given higher flexibility to bending machine by manual front and rear adjustment, and unique X2 axis stop finger mechanism can be independently moved forward and backward, and the bending and positioning of bevelled plate material become easy, provide strong support for the processing of complex sheet metal parts;The mechanism not only adapts to bending regular workpiece, but also can be bent by manual adjustment bevelled plate material workpiece, applicable to a variety of bending plate;The mechanism adapts to multiple bending workpieces, greatly improves bending efficiency.

The utility model discloses a three -way valve multi -plane processing frock jig relates to hardware machining technical field. Its mainly include including pedestal, and the pedestal is provided with the placement groove of installing the workpiece of waiting for processing, and the placement groove communicates with the lateral surface of pedestal, and the upper and lower two lateral surfaces of pedestal are provided with the let -go notch of letting -go of milling processing, and two let -go notches all communicate with the placement groove, still be provided with the elastic clamping assembly on the pedestal, and the elastic clamping assembly includes the compression block, spring and locking piece, and the compression block lifting sliding sets up in let -go notch one side, and the spring is located between compression block and pedestal, and the locking piece is connected with the base screw thread, and the locking piece is connected with the compression block rotation, when the compression block clamps the workpiece of waiting for processing to the placement groove, the spring is in compression state, and the upper end of locking piece is pressed to the upside of compression block, and the application has the effect of improving workpiece milling processing efficiency.

This utility model relates to the field of welding clamping technology for the production of tricycle frame head tubes, and discloses a welding equipment for the production of tricycle frame head tubes, including a base, a support tube, a round tube and a connecting tube arranged on the upper side of the base. The upper side of the base is provided with a positioning support mechanism and a locking mechanism for positioning the support tube. The locking mechanism is located on one side of the positioning support mechanism. The positioning support mechanism includes an extension platform, which is fixedly connected to the upper surface of the base. A clamping platform is fixedly connected to the upper surface of the extension platform. A slide cylinder is fixedly connected to one side of the clamping platform. A slide frame is slidably connected inside the slide cylinder. A bolt is threadedly connected to one side of the slide cylinder, and the bolt abuts against the slide frame. The positioning support mechanism is used to clamp pipes of different models, improving welding efficiency. The locking mechanism is used to clamp the workpiece with the positioning support mechanism, making the positioning operation simple and the clamping stability strong.

This utility model discloses a cardboard box stamping waste recycling tank with safety protection function, relating to the field of cardboard box processing technology. It includes a base, a protective component on the upper surface of the base, and a positioning component at the bottom of the base. The protective component includes a cover fixedly installed on the base, a first touch switch fixedly installed on the inner bottom wall of the cover, a protective plate rotatably connected to the inner bottom wall of the cover via a shaft seat, and a locking block fixedly installed on the inner top wall of the cover. An infrared sensor is inserted into the bottom of the locking block. This utility model discloses a cardboard box stamping waste recycling tank with safety protection function. The protective component facilitates protective operation during use, avoiding the need for maintenance personnel or workers to perform protective operations during maintenance, thus improving the safety of the component and preventing workers from being in a dangerous situation.

The utility model discloses an adjustable automobile part carrying robot, which belongs to the field of automobile part carrying, and comprises a limiting assembly and a lifting transfer assembly, the limiting assembly comprises a bearing plate, a fixed plate is embedded at the upper end of the bearing plate, the upper end of the bearing plate is connected with two portal frames in a sliding manner, and the upper ends of the two portal frames are both provided with hydraulic cylinders; an extrusion block is detachably mounted at the output end of the hydraulic cylinder, two positioning rods are rotationally connected to the lower end of the bearing plate, buffer springs are detachably mounted on the two sides of the bearing plate, and two sliding grooves are formed in the upper end of the bearing plate; according to the automobile part carrying robot, the arranged limiting assembly is matched with the lifting transfer assembly, so that automatic carrying operation can be conveniently conducted on automobile parts of different heights, the use convenience of the carrying robot is improved, meanwhile, the automobile parts of different sizes can be conveniently installed and fixed through mutual cooperation of the structures, and the practicability is high. And the safety of the automobile parts in the carrying process can be improved.

The utility model discloses a flange plate and web splicing and positioning tool, and relates to the field of steel structure manufacturing, the flange plate and web splicing and positioning tool comprises a flange plate supporting unit and two groups of web clamping mechanisms which are symmetrically arranged, the flange plate supporting unit comprises two bases which are arranged in parallel, and a plurality of supporting rods are fixedly welded between the two bases; the web clamping mechanism comprises a driving motor, a rotating shaft, an overturning plate and a clamping plate, the two ends of the rotating shaft are sleeved with bearing pedestals respectively, the bearing pedestals are fixedly installed on the base, and an output shaft of the driving motor is connected with the rotating shaft. The hydraulic rods on the two sides are controlled to stretch synchronously, so that the two clamping plates are close to each other, the two sides of the web are clamped at the same time, the web is perpendicularly placed on the flange plate, the flange plate and the web are spliced and positioned, positioning operation is greatly simplified, operation steps are reduced, and therefore the splicing efficiency is remarkably improved.

The utility model discloses a postoperative exercise nursing device, including electrotherapy exercise device and the circuit structure of being used in a set, and electrotherapy exercise device includes elastic bandage, and the surface fixedly connected with electrotherapy assembly has penetrated through elastic bandage, and the surface of elastic bandage and located both sides of electrotherapy assembly are all fixedly set with positioning assembly, and the utility model relates to rehabilitation equipment technical field. The postoperative exercise nursing device, through setting up the elastic bandage of silica gel material, makes electrotherapy assembly convenient to wear on the body, and setting up two positioning assemblies, can position the position of each wearing, guarantees the position of positioning assembly each time exercise uniformity and precision, also can guarantee the best exercise nursing effect under the operation of layman, and the positioning operation of positioning assembly is also relatively simple, just needs simple surface press, can extrude a small amount of non - toxic and not easy self - fading ink to the skin, and the observation hole can be used as the positioning point, and the operation is simple.

The utility model discloses a kind of heating ventilation air conditioner air outlet air filtration purification structures, belong to heating ventilation air conditioning technical field.The utility model adopts technical scheme for a kind of heating ventilation air conditioner air outlet air filtration purification structure, including the air duct shell in air conditioner air outlet, the air duct shell middle part is rotatably connected with purification assembly, the purification assembly has four circumferential equidistant settings, mutually intercommunicating channel mouth, every described channel mouth is detachably connected with filter assembly;The utility model is through the design of rotatably connected purification assembly and detachable filter assembly, realizes multi-channel filtration switching, avoids the efficiency drop caused by single filter screen blockage, simultaneously simplifies maintenance process by modular structure, with the advantages of improving filtration efficiency, reducing energy consumption and convenient maintenance.

This application discloses an adjustable lumbar support seat, including a backrest, a lumbar support body, and an adjustment device. The backrest includes a square backrest frame and a support portion horizontally disposed in the middle of the backrest frame. A first groove extending vertically is perforated in the support portion. A fabric cover is fitted onto the backrest frame, having front and back surfaces. An abutment is perforated on the back surface of the fabric cover opposite the first groove. The adjustment device passes through the first groove into the support portion. The front end of the adjustment device is connected to the lumbar support body, and the rear end of the adjustment device extends beyond the support portion and the abutment, thus protruding from the fabric cover. The adjustment device can slide up and down along the first groove, thereby causing the lumbar support body to slide up and down relative to the backrest. The adjustable lumbar support seat provided by this application allows for convenient adjustment of the lumbar support body height by moving the rear end of the adjustment device. Furthermore, only a portion of the adjustment device is exposed on the rear side of the fabric cover, resulting in a more aesthetically pleasing design.