Modularized polyester chemical fabric elasticizing device

Abstract

The utility model discloses a modularized polyester chemical fabric elasticizing device which comprises a bottom plate, a shell is fixedly connected to the upper surface of the bottom plate, a take-up wheel is arranged on one side of the front surface of the shell, a pay-off wheel is arranged on the other side of the front surface of the shell, and polyester fibers are arranged between the pay-off wheel and the take-up wheel. According to the modularized polyester chemical fabric elasticizing device, through cooperation of a bottom plate, a shell, a take-up wheel, a pay-off wheel, polyester fibers, a heating box, an elasticizing module, a motor, a lead screw, a sliding strip, an inclined rod, a sliding block, a sliding groove, a round rod, a guide roller and a heat dissipation opening, a first bevel gear conducts meshing transmission on a second bevel gear, and a rotating rod and fan blades can rotate; and after the fan blades rotate, the circulation rate of air in the surrounding environment can be increased, generated air circulation can dissipate heat generated during operation of the device, the effect is obviously improved compared with an original mode that heat dissipation is conducted only through heat dissipation openings, and long-term stable use of the device is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fabric processing, specifically to a modular polyester chemical fiber cloth elasticizing device. BACKGROUND

[0002] The polyester warp-knitted fabric elasticizing is to make polyester fiber yarn produce certain bending through "false twist" setting, produce elongation after opening "false twist" under external force, and restore "false twist" after removing external force, so that the fiber has certain elasticity, and the fundamental purpose is to make polyester fiber yarn produce deformation, under the control of the machine body, the take-up reel and the pay-off reel work at the same time, the polyester fiber wound on the pay-off reel is pulled out and fixed on the surface of the take-up reel, the machine body controls the rotation of the take-up reel to make the take-up reel rotate and wind the polyester fiber, and then the polyester fiber passes through the heating box and the elasticizing mechanism to be heated and elasticized to have certain elasticity.

[0003] In order to simplify the structure of the elasticizing device and improve the elasticizing effect, the utility model patent with the authorization public number CN214736346U is disclosed in the public technology, which discloses a polyester fabric high-efficiency elasticizing device, comprising a machine body, a heating box is arranged between a take-up reel and a pay-off reel, the machine body is provided with an elasticizing assembly and a driving assembly; the elasticizing assembly comprises four sliding blocks and four guide wheels, although the polyester fiber can be immediately elasticized after heating, the four guide wheels slide at the same time, the two upper guide wheels and the two lower guide wheels move in opposite directions, and the elasticizing effect is better through the cooperation of the multiple guide wheels.

[0004] However, the device still has some disadvantages in actual use, for example, during the operation of the machine body, only simple heat dissipation openings are opened for heat dissipation, the heat dissipation effect is poor, and the local device is easily affected by high temperature, which is not conducive to the long-term stable use of the device. In addition, during the increase of the elasticity of the polyester fiber, if the motor is not turned off in time when the sliding block slides to the end of the sliding groove, the motor in the device will be overloaded, which will damage the service life of the motor in the device over a long period of time. SUMMARY

[0005] The utility model aims at providing a modular polyester chemical fiber cloth elasticizing device to solve the problem that the machine body is only heat dissipated through simple heat dissipation openings during operation, the heat dissipation effect is poor, and the local device is easily affected by high temperature, which is not conducive to the long-term stable use of the device.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A modular polyester chemical fiber cloth elastic device, including the bottom plate, the upper surface of bottom plate is fixedly connected with the casing, one side of the front surface of casing is equipped with the take -up reel, the other side of the front surface of casing is equipped with the pay -off reel, be equipped with polyester fiber between the take -up reel and pay -off reel, polyester fiber runs through heating case, polyester fiber is fixedly connected with casing, the rear surface of bottom plate is equipped with the synergistic module, one side of the inner wall of casing is fixedly connected with motor, the other side of motor is connected with the lead screw, the outer wall of lead screw is connected with slide strip, the other side surface of slide strip both ends is inserted into the insertion rod, the end of insertion rod away from slide strip direction is fixedly connected with the contact surface of casing, the upper and lower two faces of slide strip are hingedly connected with two inclined rods from one side to the other side, the other end of inclined rod is hingedly connected with sliding block, sliding block is slidably connected with casing through the sliding groove, the inner wall of sliding block is rotatably connected with round bar, the outer wall front side end of round bar is fixedly connected with guide wheel, the outer wall of guide wheel is in close contact with polyester fiber, the rear surface of casing is evenly provided with a plurality of heat dissipation openings,

[0007] The synergistic module comprises a first umbrella-shaped gear, a second umbrella-shaped gear, a rotating rod, a box body, a vertical groove, a fan blade, a sleeve, a protruding block, a vertical rod and a support plate.

[0008] The first umbrella-shaped gear is fixedly connected to the outer wall of the rear end of the round rod, one side of the first umbrella-shaped gear is meshingly connected with the second umbrella-shaped gear, the inner wall of the second umbrella-shaped gear is fixedly connected with the rotating rod, the outer wall of the other end of the rotating rod is fixedly sleeved with the fan blade, the outer side of the first umbrella-shaped gear and the second umbrella-shaped gear is provided with the box body, the contact surface of the box body and the casing is fixedly connected, the rotating rod penetrates the box body through the vertical groove, the outer wall of the rotating rod is rotatably connected with the sleeve, the outer wall of the front and rear ends of the sleeve is fixedly connected with the protruding block, the inner wall of the protruding block is provided with the vertical rod, the upper and lower ends of the vertical rod are fixedly connected with the support plate, and the contact surface of the support plate and the box body is fixedly connected.

[0009] Preferably, the outer wall of the guide wheel is fixedly sleeved with a rubber sleeve, and the outer wall of the rubber sleeve is in close contact with the polyester fiber.

[0010] Preferably, the lead screw is connected with the motor through a transmission module.

[0011] The transmission module comprises a cylinder, a protruding rod, a first disc, a first magnetic suction disc, a second magnetic suction disc, a second disc and a rotating shaft.

[0012] The cylinder is rotatably connected to the outer wall of the screw rod at one end, and the outer wall of the cylinder is fixedly connected with the convex rod at both ends, the end of the convex rod away from the cylinder is fixedly connected with the inner wall of the shell, the center of the side surface of the first disc is fixedly connected with the contact surface of the screw rod, the surface of the first disc away from the screw rod is fixedly connected with the first magnetic disc, the other surface of the first magnetic disc is attracted to the second magnetic disc, the other surface of the second magnetic disc is fixedly connected with the second disc, the center of the other surface of the second disc is fixedly connected with the rotating shaft, and the rotating shaft is fixedly connected with the output shaft of the motor.

[0013] Preferably, the inside of the box body is provided with a sleeve plate towards the second bevel gear, the sleeve plate is rotatably connected with the rotating rod through the ball bearing, the upper and lower ends of the surface of the sleeve plate towards the second bevel gear are fixedly connected with the bent rod, and the other end of the bent rod is fixedly connected with the contact surface of the sliding block.

[0014] Compared with the prior art, the modular polyester chemical fiber cloth elastic device has the following advantages:

[0015] Through the cooperation between the bottom plate, the shell, the take-up wheel, the pay-off wheel, the polyester fiber, the heating box, the efficiency module, the motor, the screw rod, the sliding strip, the inclined rod, the sliding block, the sliding groove, the round rod, the guide roller and the heat dissipation port, when the polyester fiber is moved by traction, the guide roller, the round rod and the first bevel gear can be rotated, the first bevel gear can drive the second bevel gear to mesh and rotate, the fan blade can be rotated, the air circulation rate in the surrounding environment can be enhanced, the generated gas circulation can dissipate the heat generated during the operation of the device, the heat dissipation effect is obviously improved compared with the original simple heat dissipation through the heat dissipation port, and the long-term stable use of the device is facilitated.

[0016] Through the cooperation between the bottom plate, the shell, the take-up wheel, the pay-off wheel, the polyester fiber, the heating box, the efficiency module, the transmission module, the motor, the screw rod, the sliding strip, the inclined rod, the sliding block, the sliding groove, the round rod, the guide roller and the heat dissipation port, when the motor drives the sliding block to slide in the sliding groove, if the motor cannot be turned off in time when the sliding block slides to the end of the sliding groove, the mutual attraction force between the first magnetic disc and the second magnetic disc will be quickly overcome by the torsion generated by the rotating shaft during the operation of the motor, that is, the output shaft of the motor, the rotating shaft, the second disc and the second magnetic disc will continue to rotate, thereby preventing the motor from being overloaded and preventing the service life of the motor from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description when taken in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals are used to refer to the same or similar elements. It is to be understood that the drawings are schematic, and the proportions of the parts and elements do not necessarily bear the same ratio as in reality.

[0018] Figure 1 is a schematic view of the structure of the present application;

[0019] Figure 2 is a front view of the partial section of the present application; Figure 1

[0020] Figure 3 is a rear view of the present application; Figure 1

[0021] Figure 4 is an enlarged view of the partial section of the present application; Figure 2

[0022] Figure 5 is an enlarged view of the partial section of the present application; Figure 3

[0023] Figure 6 is a side view of the guide wheel of the present application. Figure 1

[0024] In the figure: 1, bottom plate, 2, shell, 3, take-up wheel, 4, pay-off wheel, 5, polyester fiber, 6, heating box, 7, synergistic module, 701, first umbrella gear, 702, second umbrella gear, 703, rotating rod, 704, box body, 705, vertical groove, 706, fan blade, 707, sleeve, 708, protruding block, 709, vertical rod, 710, support plate, 8, transmission module, 801, cylinder, 802, protruding rod, 803, first disc, 804, first magnetic suction disc, 805, second magnetic suction disc, 806, second disc, 807, rotating shaft, 9, motor, 10, lead screw, 11, slide bar, 12, insertion rod, 13, inclined rod, 14, sliding block, 15, sliding groove, 16, round rod, 17, guide wheel, 18, heat dissipation opening, 19, rubber sleeve, 20, sleeve plate, 21, bent rod. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] ​​​​​Through the person of the art, all electrical components in the case are connected to their adapted power supply through wires, and should be selected according to the actual situation, the appropriate controller and encoder to meet the control requirements, the specific connection and control sequence should refer to the working principle below, the working order of each electrical component is completed, and the detailed connection means is the prior art, and the working principle and process are mainly introduced below, and the electrical control is not described.

[0027] Please refer to Figures 1-6The utility model provides a technical scheme: a modular polyester chemical fiber cloth elastic device, including bottom plate 1, the upper surface of bottom plate 1 is fixedly connected with the casing 2, the front surface one side of casing 2 is equipped with take -up reel 3, the front surface other side of casing 2 is equipped with pay -off reel 4, and the pay -off reel 4 is equipped with polyester fiber 5 between take -up reel 3, and polyester fiber 5 penetrates heating box 6, and the inside of heating box 6 is equipped with heating assembly, and the operation can generate heat, and the polyester fiber 5 of the heating operation of passing through is rearranged and is shaped to the polyester chain segment in its molecular structure, to increase its tensile elasticity, and the polyester fiber 5 is fixedly connected with casing 2, and the rear surface of bottom plate 1 is equipped with efficiency module 7, and the inner wall one side of casing 2 is fixedly connected with motor 9, and the other side of motor 9 is connected with lead screw 10, and the shell of motor 9 is fixedly connected with casing 2, and the power cord of motor 9 is connected with external power supply device, can provide the required electric energy for its operation, and the outer wall of lead screw 10 is threadedly connected with slide bar 11, and the other side surface of slide bar 11 is inserted into the plug rod 12 both ends, and the plug hole 12 and the contact surface clearance of slide bar 11 are matched, and the end of plug rod 12 is fixedly connected with the contact surface of casing 2 away from slide bar 11, and the upper and lower surfaces of slide bar 11 are hingedly connected with two inclined rods 13 from one side to the other side, and the other end of inclined rod 13 is hingedly connected with sliding block 14, and sliding block 14 is slidably connected with casing 2 through sliding groove 15, and sliding block 14 can slide up and down in the inside of sliding groove 15, and the inner wall of sliding block 14 is rotatably connected with round bar 16, and round bar 16 is rotatably connected with sliding block 14 through ball bearing, and the outer wall front end of round bar 16 is fixedly connected with guide wheel 17, and the outer wall of guide wheel 17 is tightly contacted with polyester fiber 5, and the rear surface of casing 2 is evenly provided with a plurality of heat dissipation openings 18, and efficiency module 7 includes first umbrella gear 701, second umbrella gear 702, rotating rod 703, box body 704, vertical groove 705, fan blade 706, sleeve 707, protruding block 708, vertical rod 709 and support plate 710, the outer wall rear end of round bar 16 is fixedly connected with first umbrella gear 701, and the side of first umbrella gear 701 is meshingly connected with second umbrella gear 702, and the inner wall of second umbrella gear 702 is fixedly connected with rotating rod 703, and the outer wall other end of rotating rod 703 is fixedly connected with fan blade 706, and the outside of first umbrella gear 701 and second umbrella gear 702 is equipped with box body 704, and the contact surface of box body 704 and casing 2 is fixedly connected, and rotating rod 703 penetrates box body 704 through vertical groove 705, and rotating rod 703 can slide up and down in the inside of vertical groove 705, and the outer wall of rotating rod 703 is rotatably connected with sleeve 707, and rotating rod 703 is rotatably connected with sleeve 707 through ball bearing, and the outer wall of sleeve 707 is fixedly connected with protruding block 708 both ends, and the inner wall of protruding block 708 is equipped with vertical rod 709, and the outer wall of vertical rod 709 and the inner wall of protruding block 708 are matched, and the upper and lower ends of vertical rod 709 are fixedly connected with support plate 710, and the contact surface of support plate 710 and box body 704 is fixedly connected, and the outer wall of guide wheel 17 is fixedly connected with rubber sleeve 19, and the outer wall of rubber sleeve 19 is tightly contacted with polyester fiber 5,The rubber sleeve 19 is made of rubber material and has certain flexibility, so as to increase the friction of the outer wall of the guide wheel 17.

[0028] The screw rod 10 is connected with the motor 9 through the transmission module 8, and the transmission module 8 comprises a cylinder 801, a convex rod 802, a first disc 803, a first magnetic disc 804, a second magnetic disc 805, a second disc 806 and a rotating shaft 807. The cylinder 801 is rotatably connected on the upper side of the outer wall of the screw rod 10, and is rotatably connected with the screw rod 10 through a ball bearing. The convex rod 802 is fixedly connected on the front and rear ends of the outer wall of the cylinder 801, and the end of the convex rod 802 away from the cylinder 801 is fixedly connected with the inner wall of the shell 2. The side surface of the first disc 803 is fixedly connected with the contact surface of the screw rod 10. The first magnetic disc 804 is fixedly connected on the surface of the first disc 803 away from the screw rod 10. The second magnetic disc 805 is attracted to the other surface of the first magnetic disc 804. The first magnetic disc 804 and the second magnetic disc 805 are made of magnet material and are magnetically attracted to each other. The second disc 806 is fixedly connected on the other surface of the second magnetic disc 805. The rotating shaft 807 is fixedly connected on the center of the other surface of the second disc 806. The rotating shaft 807 is concentrically fixedly connected with the output shaft of the motor 9. The sleeve plate 20 is arranged in the box body 704 and is rotatably connected with the rotating rod 703 through a ball bearing. The sleeve plate 20 is fixedly connected with the contact surface of the sliding block 14 through the bent rod 21. The bent rod 21 is fixedly connected on the upper and lower ends of the surface of the sleeve plate 20 away from the second bevel gear 702. The bent rod 21 can enhance the stability between the first bevel gear 701 and the second bevel gear 702, and facilitate the stable meshing transmission of the first bevel gear 701 to the second bevel gear 702.

[0029] The modular polyester fiber cloth elasticizing device, in the process of use, firstly winds the polyester fiber 5 on the one end of the upper side of the pay-off wheel 4, passes through a plurality of guide wheels 17, and fixes the end of the polyester fiber 5 on the surface of the take-up wheel 3, when the take-up wheel 3 and the pay-off wheel 4 start to work on the take-up and pay-off operation of the polyester fiber 5, the polyester fiber 5 passes through the heating box 6 to be heated, so that the polyester chain segment in the molecular structure is rearranged and shaped, thereby increasing the tensile elasticity, at this time, the motor 9 works to drive the lead screw 10 to rotate and make the sliding bar 11 move, through the transmission of the inclined rod 13 to make a plurality of sliding blocks 14 move in a plurality of sliding grooves 15 respectively, thereby driving a plurality of guide wheels 17 to move, and the polyester fiber 5 is subjected to the elasticizing operation, in this process, when the polyester fiber 5 is pulled and moved, frictional force can be applied to the guide wheel 17, the round rod 16 and the first bevel gear 701 are rotated, the first bevel gear 701 is meshed with the second bevel gear 702 to drive the rotating rod 703 and the fan blade 706 to rotate, the fan blade 706 rotates to enhance the air circulation rate in the surrounding environment, and the generated gas circulation can dissipate the heat generated by the operation of the device, compared with the original simple heat dissipation through the heat dissipation port 18, the effect is obviously improved, which is beneficial to the long-term stable use of the device, in addition, when the motor drives the sliding block 14 to slide in the sliding groove 15, if the motor 9 cannot be turned off in time when the sliding block 14 slides to the end of the sliding groove 15, the mutual attraction force between the first magnetic suction disc 804 and the second magnetic suction disc 805 will be quickly exceeded by the torsion of the rotating shaft 807 generated by the operation of the motor 9, that is, the output shaft of the motor 9, the rotating shaft 807, the second disc 806 and the second magnetic suction disc 805 will continue to rotate, thereby preventing the motor 9 from overloading, and preventing the service life of the motor 9 from being damaged due to improper operation.

[0030] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0031] In the utility model, unless another definite provision and limitation, the term " install ", " set ", " connect ", " fix ", " screw " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connect, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation, for the ordinary skill in the art, can understand the specific meaning of the above-mentioned term in the utility model according to specific circumstances.

[0032] In addition, it also needs to be explained that, for the convenience of description, only the parts related to the disclosure are shown in the drawings. The embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict; it should be noted that the concepts of "first", "second" and the like mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units; it should be noted that the modification of "one" or "multiple" mentioned in the present disclosure is illustrative and not restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more"; the names of the messages or information exchanged between the multiple devices in the embodiments of the present disclosure are only for illustrative purposes, and not for limiting the scope of the messages or information.

[0033] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A modular polyester fiber cloth elasticizing device comprising a base plate (1), characterized in that: The upper surface of the bottom plate (1) is fixedly connected with a shell (2), the front surface of the shell (2) is provided with a take-up wheel (3), the other side of the front surface of the shell (2) is provided with a pay-off wheel (4), the pay-off wheel (4) and the take-up wheel (3) are provided with a polyester fiber (5) therebetween, the polyester fiber (5) penetrates through a heating box (6), the polyester fiber (5) is fixedly connected with the shell (2), the rear surface of the bottom plate (1) is provided with an efficiency increasing module (7), the inner wall of the shell (2) is fixedly connected with a motor (9), the other side of the motor (9) is connected with a lead screw (10), the outer wall of the lead screw (10) is threadedly connected with a sliding bar (11), the other side surface of the sliding bar (11) is inserted with an insertion rod (12) at the front and rear ends, the end, away from the sliding bar (11), of the insertion rod (12) is fixedly connected with the contact surface of the shell (2), the upper and lower surfaces of the sliding bar (11) are hingedly connected with two inclined rods (13) from one side to the other side, the other end of the inclined rod (13) is hingedly connected with a sliding block (14), the sliding block (14) is slidably connected with the shell (2) through a sliding groove (15), the inner wall of the sliding block (14) is rotatably connected with a round rod (16), the outer wall of the round rod (16) is fixedly connected with a guide wheel (17) at the front end, the outer wall of the guide wheel (17) is tightly abutted against the polyester fiber (5), a plurality of heat dissipation openings (18) are uniformly formed in the rear surface of the shell (2); The efficiency increasing module (7) comprises a first umbrella gear (701), a second umbrella gear (702), a rotating rod (703), a box body (704), a vertical groove (705), a fan blade (706), a sleeve (707), a protruding block (708), a vertical rod (709) and a supporting plate (710); The first umbrella gear (701) is fixedly sleeved at the outer wall rear end of the round rod (16), one side of the first umbrella gear (701) is meshedly connected with the second umbrella gear (702), the inner wall of the second umbrella gear (702) is fixedly connected with the rotating rod (703), the outer wall of the other end of the rotating rod (703) is fixedly sleeved with the fan blade (706), the outer sides of the first umbrella gear (701) and the second umbrella gear (702) are provided with the box body (704), the contact surface of the box body (704) is fixedly connected with the shell (2), the rotating rod (703) penetrates through the box body (704) through the vertical groove (705), the outer wall of the rotating rod (703) is rotatably connected with the sleeve (707), the outer walls of the front and rear ends of the sleeve (707) are fixedly connected with the protruding block (708), the inner wall of the protruding block (708) is provided with the vertical rod (709), the upper and lower ends of the vertical rod (709) are fixedly connected with the supporting plate (710), and the contact surface of the supporting plate (710) is fixedly connected with the box body (704).

2. The device according to claim 1, characterized in that: The outer wall of the guide wheel (17) is fixedly sleeved with a rubber sleeve (19), and the outer wall of the rubber sleeve (19) is tightly abutted against the polyester fiber (5).

3. The device according to claim 1, wherein the device is characterized in that: The lead screw (10) is connected with the motor (9) through the transmission module (8). The transmission module (8) comprises a cylinder (801), a convex rod (802), a first disc (803), a first magnetic suction disc (804), a second magnetic suction disc (805), a second disc (806) and a rotating shaft (807); The cylinder (801) is rotationally connected above the outer wall side end of the lead screw (10), the outer wall front and rear ends of the cylinder (801) are fixedly connected with the convex rods (802), the end of the convex rod (802) away from the cylinder (801) is fixedly connected with the inner wall of the shell (2), the side surface center of the first disc (803) is fixedly connected with the contact surface of the lead screw (10), the surface of the first disc (803) away from the lead screw (10) is fixedly connected with the first magnetic suction disc (804), the other surface of the first magnetic suction disc (804) is attracted with the second magnetic suction disc (805), the other surface of the second magnetic suction disc (805) is fixedly connected with the second disc (806), the center of the other surface of the second disc (806) is fixedly connected with the rotating shaft (807), and the rotating shaft (807) is fixedly connected with the output shaft of the motor (9) in a concentric manner.

4. The device according to claim 1, wherein the device is characterized in that: The inside of the box body (704) is provided with a sleeve plate (20) towards the direction of the second umbrella-shaped gear (702), the sleeve plate (20) is rotationally connected with the rotating rod (703) through a ball bearing, the upper and lower ends of the surface of the sleeve plate (20) towards the second umbrella-shaped gear (702) are fixedly connected with the bent rods (21), and the other ends of the bent rods (21) are fixedly connected with the contact surface of the sliding block (14).

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