CN220757597U - Clinical clamping device that uses of orthopedics - Google Patents

Abstract

The utility model belongs to the field of orthopedics clinic, and particularly relates to a clamping device for orthopedics clinic. The technique includes the bottom plate that the level was established, the bottom plate top is equipped with flexible subassembly, is fixed with on flexible end of flexible subassembly and places the board, and the movable block is all installed to the left and right sides of placing the board, and the top of all movable blocks is all vertical to be equipped with the bracing piece, is fixed with the diaphragm between two spinal branch vaulting poles, installs spacing subassembly on the diaphragm, and left bracing piece is articulated with left movable block, installs fixed subassembly between the bracing piece on right side and the movable block on right side. Through pulling the diaphragm, make the support frame swing that two spinal branch vaulting poles and diaphragm make up open, lift up patient's shank to place on the board from the arbitrary direction of controlling of placing the board, then at pulling the diaphragm, make the support frame swing closure, and fix the support frame after the swing closure through fixed subassembly, make patient's foot need not the action by a wide margin, alright simple and convenient put on placing the board.

Description

Clinical clamping device that uses of orthopedics

Technical Field

The utility model belongs to the field of orthopedics clinic, and particularly relates to a clamping device for orthopedics clinic.

Background

In orthopaedics treatment, edema can appear after the feet are fractured, in order to promote blood circulation, the legs of a patient need to be lifted when the patient lies on a patient bed, the injured feet of the patient are higher than the heart level, and the promotion of blood circulation and detumescence are facilitated.

But current clinical clamping device of using of orthopedics is when using, need lift patient's shank, then penetrates between two clamp plates with patient's foot, carries out spacingly through removing two clamp plates to patient's shank, but the patient can not too much or too big removal after the fracture, because the broken end of bone is unstable this moment, can cause the broken end of bone to shift, and the mode of laying the foot is too complicated and the action range is great can influence patient's rehabilitation.

Disclosure of Invention

According to the defects in the prior art, the technical problems to be solved by the utility model are as follows: the clamping device for orthopaedics clinic is simple and convenient in foot placement mode, and the foot motion amplitude is small.

Clinical clamping device of using of orthopedics, bottom plate including the level setting, the bottom plate top is provided with flexible subassembly, horizontal fixation has the board of placing on flexible end of flexible subassembly, the equal horizontal installation in left and right sides of placing the board is sliding fit's movable block with placing the board, the top of all movable blocks is all vertical the bracing piece that is provided with, horizontal fixation has the diaphragm between two spinal branch vaulting poles, install on the diaphragm and be used for carrying out spacing subassembly to patient's shank, left bracing piece is articulated with left movable block, install the fixed subassembly that is used for carrying out fixing to the bracing piece after the swing is closed between the movable block on right side bracing piece and the right side.

Further, the fixing component comprises a locking rod, the top of the moving block on the right side is horizontally fixed with a mounting block, the bottom of the supporting rod on the right side is vertically fixed with a fixing block, a mounting groove which is communicated up and down and used for clamping the fixing block is formed in the right side wall of the mounting block corresponding to the fixing block, grooves which are communicated left and right are formed in the right side walls of the mounting block and the fixing block, and one end of the locking rod is hinged in the groove on the mounting block; the middle section of the locking rod is independently clamped in the groove on the fixed block after swinging and closing, the two ends of the locking rod are clamped in the groove on the mounting block, and the locking rod is provided with a locking component for locking the locking rod after swinging and closing.

Further, spacing subassembly includes two connecting rods, and the one end of two connecting rods all is fixed with the splint that are used for carrying out spacing to patient's shank, and the communicating guide slot from top to bottom has been seted up at the diaphragm top, and the other end of two connecting rods all vertically passes the guide slot, is provided with the adjusting part that is used for removing the regulation to two splint on the diaphragm, and the one end that two connecting rods passed the guide slot is all fixed on adjusting part.

Furthermore, the two surfaces of the two splints, which are contacted with the lower leg of the patient, are respectively fixed with a protection pad for protecting the skin of the patient.

Further, a supporting plate capable of freely swinging for supporting thighs of the patient is hinged on the front side wall of the placing plate.

Compared with the prior art, the utility model has the following beneficial effects:

through pulling the diaphragm, make the support frame that two spinal branch vaulting poles and diaphragm combination formed open with the pin joint of left bracing piece and left movable block as the centre of a circle swing, lift up patient's shank gently, and place on placing the board from the arbitrary direction in two directions about placing the board, then at the pulling diaphragm, make the support frame swing closure, and fix the bracing piece on the right side on the movable block through fixed subassembly, thereby fix the support frame after the swing closure, thereby make patient's foot need not the action by a wide margin, can be simply and conveniently put on placing the board, then spacing subassembly is spacing to patient's shank avoid patient's leg to drop from placing the board, and utilize the telescopic assembly to adjust the height of placing the board.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a right side view of the present utility model;

FIG. 3 is a cross-sectional view at A-A of the present utility model;

FIG. 4 is a cross-sectional view at B-B in the present utility model;

FIG. 5 is an enlarged schematic view of area a of FIG. 2;

FIG. 6 is an enlarged schematic view of region b of FIG. 3;

FIG. 7 is an enlarged schematic view of region c of FIG. 4;

FIG. 8 is an exploded view of the present utility model;

FIG. 9 is a schematic view of an assembly of the present utility model;

the names of the components in the figure are as follows: 1. the device comprises a supporting rod 2, a transverse plate 3, a mounting plate 4, a bidirectional screw 5, a nut 6, a connecting rod 7, a hand wheel 8, a clamping plate 9, a protection pad 10, a mounting block 11, a fixed plate 12, a moving block 13, a supporting plate 14, a placing plate 15, a sliding rod 16, a second pipeline 17, a first pipeline 18, a bottom plate 19, a fixed block 20 and a locking rod.

Detailed Description

The present utility model is further illustrated by the following examples, which are not intended to be limiting, but any modifications, equivalents, improvements, etc. within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.

Examples

The orthopedic clinical clamping device according to this embodiment, as shown in fig. 1, 2 and 4, includes a horizontally disposed bottom plate 18, a telescopic assembly is disposed at the top of the bottom plate 18, a placement plate 14 is horizontally fixed on the telescopic end of the telescopic assembly, the telescopic assembly includes two first pipes 17, two first pipes 17 are independently threaded with second pipes 16, bottoms of the two first pipes 17 are fixed on the bottom plate 18, the two second pipes 16 are fixed on bottoms of the placement plate 14, locking assemblies for locking the moved second pipes 16 are disposed on all the first pipes 17, and the second pipes 16 move in the first pipes 17 to change the overall length of the combined pipes, so as to adjust the height of the placement plate 14, and then the pipes are locked by the locking assemblies, although the two first pipes 17 are not necessarily pipes, and other shapes, such as rectangular, can be selected. The locking assembly comprises a screw, a threaded hole in threaded fit with the corresponding screw is formed in the first pipeline 17, and the screw passes through the threaded hole to prop against the second pipeline 16, so that the moved second pipeline 16 is locked; the telescopic assembly can also use an electric push rod, the electric push rod is also named as a linear driver, the structure of the telescopic assembly consists of a driving motor, a reduction gear, a screw rod, a nut, a guide sleeve, a push rod, a sliding seat, a spring, a shell, a turbine, a micro-motion control switch and other tools, the working principle is that the motor drives a pair of screw nuts after the reduction of the gear to change the rotation motion of the motor into linear motion, the telescopic motion of the push rod is completed by utilizing the forward and backward rotation of the motor, the bottom of the electric push rod is fixed on a bottom plate 18, and the telescopic end of the electric push rod is fixed on a placing plate 14, so that the height of the placing plate 14 is adjusted through the electric push rod;

the left side and the right side of the placing plate 14 are horizontally provided with moving blocks 12 which are in sliding fit with the placing plate 14, the front side walls of all the moving blocks 12 are provided with through holes which are communicated with each other in the front and the back, sliding rods 15 are independently arranged in all the through holes in a penetrating way, locking components are arranged on all the moving blocks 12, the two ends of each sliding rod 15 are fixedly provided with fixing plates 11, the fixing plates 11 are fixedly arranged on the placing plate 14, and the distance between each sliding rod 15 and the placing plate 14 is larger than the thickness of each moving block 12, so that the moving blocks 12 can move on the corresponding sliding rods 15, and all the moving blocks 12 can move along the length direction of the placing plate 14; the locking assembly comprises bolts, threaded holes which are in threaded fit with the bolts are formed in all the moving blocks 12, and the bolts penetrate through the threaded holes and are propped against the sliding rods 15, so that the moving blocks 12 after moving are locked; of course, sliding fit between the sliding blocks and the sliding grooves can be adopted, when the sliding block is installed, one sliding block is fixed on all the moving blocks 12, two sliding grooves for sliding the sliding blocks are formed on the placing plate 14 corresponding to the sliding blocks, and the sliding blocks slide in the corresponding sliding blocks, so that all the moving blocks 12 can move along the length direction of the placing plate 14;

the upper parts of all the moving blocks 12 are vertically provided with supporting rods 1, a transverse plate 2 is horizontally fixed between the two supporting rods 1, the two supporting rods 1 are aligned horizontally, the transverse plate 2 is positioned at the upper end between the two supporting rods 1, the two supporting rods 1 and the transverse plate 2 are combined into a supporting frame with a reversed U-shaped structure, and when the device is used, the lower leg of a patient passes through the supporting frame after being placed on the placing plate 14;

the limiting component used for limiting the lower leg of the patient is arranged on the transverse plate 2, and can be adjusted when in use, so that the lower leg limiting device is suitable for lower legs with different sizes, and therefore the lower leg of the patient is limited, and the lower leg of the patient is prevented from falling from the placing plate 14;

the left support rod 1 is hinged with the left movable block 12, the left support rod 1 is connected with the left movable block 12 through a pivot, a hinge seat is fixed at the top of the left movable block 12, through holes are formed in the hinge seat and the left support rod 1, the pivot is independently penetrated in the through holes, two stop blocks are fixed at two ends of the pivot, and the hinge seat and the left support rod 1 are positioned between the two stop blocks, so that the support frame can swing by taking the hinge point of the left support rod 1 and the left movable block 12 as the center of a circle; the hinge can be adopted to connect, the hinge is always formed into a two-fold type part which is used for connecting two parts of an object and enabling the two parts to move, one end of the hinge is fixed on the left side wall of the left moving block 12 through a bolt, and the other end of the hinge is fixed on the left side wall of the left supporting rod 1, so that the supporting frame can swing by taking the hinging point of the left supporting rod 1 and the left moving block 12 as the circle center;

the support frame is characterized in that a fixing component for fixing the support rod 1 after swinging and closing is arranged between the support rod 1 on the right side and the moving block 12 on the right side, after the support frame swings and opens by taking the hinging point of the support rod 1 on the left side and the moving block 12 on the left side as the circle center, a patient can directly put the lower leg on the placing plate 14 from the left direction and the right direction of the placing plate 14, and the support frame is pulled after the lower leg is put, so that the support frame swings and closes by taking the hinging point of the support rod 1 on the left side and the moving block 12 on the left side as the circle center, and the support rod 1 on the right side is fixed on the moving block 12 on the right side through the fixing component, so that the support frame after swinging and closing is fixed.

In the practical use process, firstly, the transverse plate 2 is pulled, the support frame formed by combining the two support rods 1 and the transverse plate 2 swings and opens by taking the hinging point of the left support rod 1 and the left movable block 12 as the circle center, the lower leg of a patient is slightly lifted and is placed on the placing plate 14 from any direction of the left direction and the right direction of the placing plate 14, then the transverse plate 2 is pulled, the support frame swings and closes by taking the hinging point of the left support rod 1 and the left movable block 12 as the circle center, and the right support rod 1 is fixed on the right movable block 12 through the fixing component, so that the support frame after swinging and closing is fixed, the foot of the patient can be simply and conveniently placed on the placing plate 14 without large-scale actions, and then the placing plate 14 is pulled, the placing plate 14 is made to drive the two second pipelines 16 to move in the two first pipelines 17 respectively to change the overall length of the pipelines after combination, so that the height of the placing plate 14 is adjusted, the second pipelines 16 are locked by rotating screws, so that the height of the placing plate 14 is locked, finally, the two moving blocks 12 are moved to change the position of the supporting frame, the limiting components on the supporting frame and the transverse plate 2 are aligned with the positions of the patient's lower leg, the positions of wounds cannot be influenced, the patient's lower leg is prevented from collision with the wounds after the unintentional movement, the bolts on the moving blocks 12 are rotated after the proper positions are reached, the moving blocks 12 after the movement are locked, and the patient's lower leg is limited by the limiting components, so that the patient's lower leg is prevented from falling from the placing plate 14.

Examples

In this embodiment, as shown in fig. 5, fig. 6 and fig. 7, the fixing assembly includes a locking rod 20, the top of the moving block 12 on the right side is horizontally fixed with a mounting block 10, the bottom of the supporting rod 1 on the right side is vertically fixed with a fixing block 19, a mounting groove for clamping the fixing block 19 is formed on the right side wall of the mounting block 10 corresponding to the fixing block 19, and when the supporting frame formed by combining the two supporting rods 1 and the transverse plate 2 swings and closes with the hinge point of the supporting rod 1 on the left side and the moving block 12 on the left side as the center of a circle, the fixing block 19 is clamped in the mounting groove, so as to limit the fixing block 19 and limit the supporting frame;

grooves which are communicated left and right are formed in the right side walls of the mounting block 10 and the fixing block 19, and the grooves in the mounting block 10 and the fixing block 19 are communicated and aligned;

one end of the locking rod 20 is hinged in a groove on the mounting block 10, when the locking rod 20 is used, the locking rod 20 can swing inside and outside by taking a hinging point as a circle center, the width of the locking rod 20 is the same as the width of the grooves on the mounting block 10 and the fixed block 19, and of course, the width of the locking rod 20 can be slightly smaller than the width of the grooves on the mounting block 10 and the fixed block 19, so that the locking rod 20 can swing;

the middle section of the locking rod 20 is independently clamped in a groove on the fixed block 19 after swinging and closing, two ends of the locking rod 20 are clamped in the groove on the mounting block 10, a locking component for locking the locking rod 20 after swinging and closing is arranged on the locking rod 20, the locking component comprises a screw, a threaded hole which is in threaded fit with the screw is formed in the groove bottom of the groove on the mounting block 10 corresponding to the screw, a through hole is formed in the locking rod 20 corresponding to the threaded hole, one end of the screw penetrates through the through hole and is arranged in the threaded hole, when the locking rod 20 swings and closes, the locking rod 20 is clamped in the grooves on the mounting block 10 and the fixed block 19, the locking rod 20 after swinging and closing is locked through rotating the screw, so that the fixed block 19 is fixed, the fixed block 19 is prevented from moving or falling out of the mounting groove on the mounting block 10, and the support frame after swinging and closing can be fixed through the fixed block 19; of course, the locking assembly can also adopt a buckle connection, including the locking rod 20 provided with a buckling part, a corresponding clamping groove matched with the buckling part is arranged in a groove on the mounting block 10, and the locking rod 20 after swinging and closing is locked through the clamping of the buckling part and the clamping groove.

In the practical use process, when the support frame formed by combining the two support rods 1 and the transverse plate 2 swings and closes by taking the hinging point of the left support rod 1 and the left moving block 12 as the circle center, the fixed block 19 can be clamped in the mounting groove on the mounting block 10, then the locking rod 20 is pulled to swing and clamp in the grooves on the mounting block 10 and the fixed block 19, the locking rod 20 after swinging and closing is locked in the grooves through the rotating screw, so that the fixed block 19 is fixed, the fixed block 19 is prevented from moving or falling out of the mounting groove on the mounting block 10, and the support frame after swinging and closing is fixed through fixing the fixed block 19.

In the in-process of in-service use, fixed subassembly still can adopt the locating pin, be around parallel two mounting panels of vertical fixed at the top of movable block 12 on right side, vertically set up a connecting plate between two mounting panels, the bottom at bracing piece 1 on right side is fixed to the connecting plate, the through-hole that is used for the locating pin to pass is all offered to corresponding locating pin on two mounting panels and connecting plate, after the support frame swing closure that two bracing pieces 1 and diaphragm 2 combination formed, the connecting plate can be located between two mounting panels, through wearing the locating pin to adorn in the through-hole on two mounting panels and connecting plate, thereby fix the support frame after the swing closure.

Examples

The technology is further described in this embodiment, as shown in fig. 5, fig. 6 and fig. 7, the limiting component includes two connecting rods 6, one ends of the two connecting rods 6 are both fixed with clamping plates 8 for limiting the lower leg of the patient, the top of the transverse plate 2 is provided with a guide slot which is vertically communicated with each other, the other ends of the two connecting rods 6 vertically pass through the guide slot, the guide slot is used for guiding the moving direction of the connecting rod 6, the swinging of the connecting rod 6 is avoided in the moving or using process, the two clamping plates 8 are all in arc structures, and when the two clamping plates 8 are closed, a part of the lower leg of the patient can be wrapped, so that the lower leg of the patient can be effectively prevented from falling from the placing plate 14;

the adjusting assembly for moving and adjusting the two clamping plates 8 is arranged on the transverse plate 2, one end of each connecting rod 6 penetrating through the guide groove is fixed on the adjusting assembly, the adjusting assembly is a bidirectional ball screw, each bidirectional ball screw consists of a screw rod, a nut, a steel ball, a pre-pressing piece, a reverser and a dust collector, the function of the bidirectional ball screw is that the rotary motion is converted into linear motion, when the bidirectional ball screw is installed, two mounting plates 3 are vertically fixed on the top of the transverse plate 2, the two mounting plates 3 are distributed in parallel left and right, the bidirectional screw rods 4 are horizontally arranged between the two mounting plates 3, rotating shafts are horizontally fixed on two ends of each bidirectional screw rod 4, the two rotating shafts are respectively rotatably installed on the two mounting plates 3, one end of each rotating shaft penetrates through the mounting plate 3 and is fixedly provided with a hand wheel 7 for driving the bidirectional screw rods 4 to rotate, one end of each connecting rod 6 penetrating through the guide groove is respectively fixed on the two nuts 5, and when the bidirectional screw rods 4 are driven to rotate through the rotating hand wheel 7, so that the two connecting rods 6 respectively drive the two connecting rods 6 to move in opposite directions, the two connecting rods 6 drive the two clamping plates 8 to move, and therefore the distance between the two clamping plates 8 is limited by a patient; of course, the adjusting component can also adopt the cooperation of sliding sleeve and slide bar, during the installation, two sliding sleeves are sleeved on the slide bar, the slide bar is fixed between two mounting panels 3, two connecting rods 6 pass the one end of guide slot and fix respectively on two sliding sleeves, a screw hole has all been seted up on every sliding sleeve, screw that is screw-threaded fit with the screw hole is all worn to be equipped with to screw hole, through promoting two sliding sleeves, make two sliding sleeves remove on the slide bar, thereby drive splint 8 through two connecting rods 6 and move about, after moving to suitable position, rotate the screw, make the one end top of screw on the slide bar, lock the sliding sleeve after the removal, carry out spacingly to patient's shank through splint 8.

In actual use, the bidirectional screw 4 is driven to rotate by rotating the hand wheel 7, so that the two nuts 5 respectively drive the two connecting rods 6 to move in opposite directions, the two connecting rods 6 drive the two clamping plates 8 to move, the distance between the two clamping plates 8 is adjusted, after the two clamping plates 8 move to a proper position, the hand wheel 7 is stopped rotating, the lower leg of a patient is limited by the two clamping plates 8, and the lower leg of the patient is prevented from falling from the placing plate 14.

In actual use, the limiting component can also adopt two locating rods, the two locating rods are vertically arranged below the transverse plate 2, the bottom of the transverse plate 2 is provided with a sliding groove, the tops of the two locating rods are respectively provided with a sliding block, the sliding blocks are slidably clamped in the sliding groove, the sliding blocks are respectively provided with a threaded hole, the threaded holes are respectively penetrated with screws which are in threaded fit with the threaded holes, when the limiting component is used, the two sliding blocks are pushed to move in the sliding groove by pushing the two sliding blocks, the two locating rods are moved to the proper positions on the two sides of the lower leg of a patient, the lower leg is located between the two locating rods, then the screws are rotated, one ends of the screws are propped against the groove bottom of the sliding groove to lock the moved sliding blocks, and the two locating rods are moved to the proper positions to limit the lower leg of the patient, so that the lower leg of the patient is prevented from falling from the placing plate 14.

Examples

This embodiment further illustrates the technique, as shown in fig. 1, fig. 4 and fig. 8, two faces that two splint 8 and patient's shank contacted are all fixed with the protection pad 9 that is used for protecting patient's skin, the material of protection pad 9 is medical silica gel material, paste two protection pads 9 respectively on two splint 8 and patient's shank contacted two faces through medical pressure sensitive adhesive, thereby when patient's shank appears moving, protection pad 9 can protect patient's skin, avoid splint 8 to cause the damage to patient's skin, improve splint 8's comfort level, of course, the material of protection pad 9 still can adopt medical sponge or other soft medical materials of texture.

Examples

This embodiment will be further explained the technique, as shown in fig. 1, fig. 2 and fig. 8, it has the layer board 13 that can freely swing and be used for carrying out the support to patient's thigh to articulate on the preceding lateral wall of placing the board 14, after placing the board 14 height-adjusting, the one end of layer board 13 can be brought to the same height by placing the board 14, in the in-process of going up and down of one end of layer board 13, the layer board 13 can regard the pin joint of placing the board 14 and layer board 13 as centre of a circle swing angle, the angle of layer board 13 wobbling is roughly the same with the angle of patient's thigh because of the rising of shank, make place the board 14 when going up and down to different heights, layer board 13 all can be better support patient's thigh, improve the comfort level that the patient used, place the articulated between board 14 and the layer board 13 adopts pivot connection, be fixed with first hinge seat on the preceding lateral wall of placing the board 14, be fixed with the second hinge seat on one end of layer board 13, all offer the through-hole on the second hinge seat, wear the pivot in the through-hole independently, at both ends fixed stop block, the pivot seat is fixed with the other end of the first hinge seat and the second hinge seat is located between layer board 13 and layer board 14 through the hinge, the screw 13 is fixed to place between the layer board 13 and the other end through the pivot seat.

Claims (5)

1. Clinical clamping device of using of orthopedics, including bottom plate (18) that the level set up, its characterized in that: the utility model discloses a lower limb swing device, including bottom plate (18), fixed plate (14) are fixed with to the flexible end level of bottom plate (18), the left and right sides of placing plate (14) is horizontal installation and is sliding fit's movable block (12) with placing plate (14), the top of all movable blocks (12) is all vertical bracing piece (1) that are provided with, the level is fixed with diaphragm (2) between two spinal branch vaulting poles (1), install the spacing subassembly that is used for carrying out spacing to patient's shank on diaphragm (2), left bracing piece (1) are articulated with left movable block (12), install the fixed subassembly that is used for carrying out fixing to bracing piece (1) after the swing closure between bracing piece (1) on right side and right movable block (12).

2. The orthopedic clinical gripping device of claim 1, wherein: the fixing assembly comprises a locking rod (20), the top of a moving block (12) on the right side is horizontally fixed with a mounting block (10), the bottom of a supporting rod (1) on the right side is vertically fixed with a fixing block (19), a mounting groove which is communicated up and down and used for clamping the fixing block (19) is formed in the right side wall of the mounting block (10), grooves which are communicated left and right are formed in the right side walls of the mounting block (10) and the fixing block (19), and one end of the locking rod (20) is hinged in the groove on the mounting block (10); the middle section of the locking rod (20) is independently clamped in a groove on the fixed block (19) after swinging and closing, two ends of the locking rod (20) are clamped in grooves on the mounting block (10), and a locking assembly for locking the locking rod (20) after swinging and closing is arranged on the locking rod (20).

3. The orthopedic clinical gripping device of claim 1, wherein: the limiting assembly comprises two connecting rods (6), clamping plates (8) used for limiting the lower leg of a patient are fixed at one ends of the two connecting rods (6), a guide groove which is communicated with each other up and down is formed in the top of the transverse plate (2), the other ends of the two connecting rods (6) vertically penetrate through the guide groove, an adjusting assembly used for moving and adjusting the two clamping plates (8) is arranged on the transverse plate (2), and one ends of the two connecting rods (6) penetrating through the guide groove are fixed on the adjusting assembly.

4. The orthopedic clinical gripping device of claim 3, wherein: and protection pads (9) for protecting the skin of the patient are fixed on two surfaces, which are contacted with the lower leg of the patient, of the two clamping plates (8).

5. The orthopedic clinical gripping device of claim 1, wherein: a supporting plate (13) which can swing freely and is used for supporting thighs of a patient is hinged on the front side wall of the placing plate (14).