A tensile force detection device for a stainless steel watchband

Abstract

The present application relates to tension detection technical field, and disclose a kind of stainless steel watchband's tension detection device, including test seat and fixedly installed in the test seat top bracket, the top of bracket is fixedly installed with top plate, the inside of bracket is provided with pull plate, bracket is provided with the drive mechanism corresponding with pull plate, the top surface of pull plate and the bottom surface of top plate are fixedly installed with fixed sleeve, the opposite end of two fixed sleeves is fixedly installed with chuck;Wherein, the inside of chuck is provided with the clamping assembly for fixing the end of stainless steel watchband.This application uses the fixed mode of inserting rod and watchband mounting hole cooperation, clamping plate light clamping, avoids the local deformation and stress interference caused by traditional clamping jaw large force clamping watchband first section, ensure that watchband stress meets actual working condition when detecting, effectively improve the authenticity and reliability of detection data, avoid the detection error caused by fixing mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tension detection, and in particular to a tension detection device for a stainless steel watchband. BACKGROUND

[0002] A stainless steel watchband is mainly made of stainless steel, which is an alloy steel containing a certain proportion of chromium and other elements to improve its corrosion resistance and strength. Common stainless steel materials include 304 stainless steel, 316L stainless steel, etc. Among them, 316L stainless steel has better corrosion resistance due to the presence of molybdenum and is commonly used in high-end watches.

[0003] According to the search, a watchband tension detection device is disclosed in Chinese patent No. CN222506012U, which comprises a support frame, a rotating rod is rotatably installed on one end of the side wall of the support frame, and a first drive assembly is installed on the outer wall of the support frame for driving the rotating rod to rotate; the first clamping frame is provided at the end of the rotating rod inside the support frame, and the first elastic clamping assembly is provided at the top of the first clamping frame; a moving rod is slidably arranged on the other end of the side wall of the support frame, and a second clamping frame is arranged at the end of the moving rod inside the support frame; the second clamping frame is provided with a second elastic clamping assembly, and the second clamping frame is provided with a rack plate at the bottom; a second drive assembly is installed on the inner wall of the support frame for driving the rack plate to rotate; the device can effectively facilitate the tension detection and torsion detection of the watchband, thereby facilitating the processing of the watch. However, in actual use, the following problems still exist:

[0004] In the process of detecting the tension of the watchband, the detection method of the above-mentioned device is to clamp and fix the end of the watchband by the clamping jaw. However, for a stainless steel watchband, the clamping jaw usually needs to tightly clamp the first section of the watchband. In this case, a large clamping force will be generated between the clamping jaw and the first section of the watchband. On the one hand, the clamping force may cause local deformation of the first section of the stainless steel watchband, changing its original stress distribution; on the other hand, during the stretching process, there will be a friction force at the contact part between the clamping jaw and the first section of the watchband, which will interfere with the tension of the watchband. The influence of the double factors makes the actual stress of the first section of the watchband during the tension detection of the stainless steel watchband deviate from the theoretical test stress, thereby affecting the accuracy of the detection.

[0005] Therefore, it is necessary to design a tension detection device for a stainless steel watchband to solve the above-mentioned problems. SUMMARY

[0006] The purpose of the present application is to solve the problems existing in the prior art and to provide a tension detection device for a stainless steel watchband.

[0007] In order to achieve the above object, the present application adopts the following technical solutions:

[0008] A tension detection device for stainless steel watchband, comprising a test seat and a support fixedly installed on the top surface of the test seat, a top plate fixedly installed on the top end of the support, a pull plate arranged on the inner side of the support, a driving mechanism arranged on the support corresponding to the pull plate, a fixed sleeve fixedly installed on the top surface of the pull plate and the bottom surface of the top plate, and a chuck fixedly installed on the opposite ends of the two fixed sleeves;

[0009] The inner side of the chuck is provided with a clamping assembly for fixing the end of the stainless steel watchband, the inner side of the fixed sleeve is provided with a linkage assembly for driving the clamping assembly to operate, and the outer side of the fixed sleeve is provided with a protection assembly for protecting the detection process.

[0010] As a preferred technical solution of the present application, the driving mechanism comprises a driving screw rotatably installed on one side of the inner wall of the support, a guide rod fixedly installed on the other side of the inner wall of the support, one end of the pull plate is screwed with the driving screw and the other end is slidingly connected with the guide rod, and a servo motor fixedly installed on the top surface of the top plate is fixedly connected with the top end of the driving screw.

[0011] As a preferred technical solution of the present application, the clamping assembly comprises two openings symmetrically arranged on the top surface of the chuck, a clamping plate slidingly installed on the inner wall of each of the two openings, a plug rod fixedly installed on the opposite sides of the two clamping plates, a through hole communicated with the two openings arranged on the top surface of the chuck, a cover plate fixedly installed on the side surface of the clamping plate and slidingly connected with the inner wall of the through hole, and a transmission structure corresponding to the two clamping plates arranged on the inner side of the chuck.

[0012] As a preferred technical solution of the present application, the width of the cover plate is the same as the width of the opening, and the plug rod is made of high-strength metal material.

[0013] As a preferred technical solution of the present application, the transmission structure comprises a shaft rotatably installed on the inner wall of the chuck, a transmission gear fixedly sleeved on the outer wall of the shaft, a transmission rack fixedly installed on the bottom end of each of the two clamping plates and engaged with the transmission gear, the width of the transmission gear is at least greater than the width of the transmission rack, a torsional spring sleeved on the end of the shaft, and the two ends of the torsional spring are fixedly connected with the shaft and the chuck, respectively, and a gap is arranged on the top surface of the chuck.

[0014] As a preferred technical scheme of the present application, the linkage assembly comprises a driving rod slidingly installed on the inner wall of the fixed sleeve, the top end of the driving rod is fixedly installed with a driving rack engaged with the transmission gear, the outer wall of the fixed sleeve is provided with a guide opening I corresponding to the bottom end of the driving rod, the bottom end of the driving rod is fixedly installed with a guide block I which is slidingly connected with the guide opening I, the side surface of the guide block I is fixedly installed with a positioning rod, and the outer wall of the fixed sleeve is provided with a limiting mechanism corresponding to the positioning rod.

[0015] As a preferred technical scheme of the present application, the limiting mechanism comprises a fixed ring fixedly installed on the outer wall of the fixed sleeve at a position below the guide opening, the top surface of the fixed ring is fixedly installed with an elastic sheet, and the top end of the elastic sheet is fixedly installed with a positioning ring matched with the positioning rod.

[0016] As a preferred technical scheme of the present application, the protection assembly comprises a support ring fixedly installed on the outer wall of the fixed sleeve, the outer wall of the fixed sleeve at a position above the support ring is slidingly installed with a sliding ring, the outer wall of the support ring is hingedly connected with a plurality of support rods arranged in a ring array, the outer wall of the sliding ring is hingedly connected with a plurality of linkage rods arranged in a ring array, the bottom end of the linkage rod is hingedly connected with the side surface of the support rod, the support spring is fixedly installed between the bottom surface of the sliding ring and the top surface of the support ring, the outer wall of the collet and the side surface of the plurality of support rods are provided with a cover cloth, the opposite side surfaces of the plurality of support rods are provided with protection cloths, the outer wall of the fixed sleeve is provided with a guide opening II corresponding to the sliding ring, the outer wall of the driving rod is provided with a guide groove, and the inner wall of the sliding ring is fixedly installed with a guide block II which is slidingly connected with the inner wall of the guide opening II and the guide groove.

[0017] As a preferred technical scheme of the present application, the support rod is movably installed with a magnetic sheet at the end away from the support ring, and the opposite magnetic poles of the two magnetic sheets at the same position are opposite.

[0018] As a preferred technical scheme of the present application, the cover cloth and the protection cloth are made of transparent material.

[0019] The present application has the following beneficial effects:

[0020] 1. By setting the clamping plate and the insertion rod, and adopting the fixing mode of cooperation of the insertion rod with the watchband mounting hole and light clamping of the clamping plate, local deformation and stress interference caused by large force clamping of the traditional clamping jaw on the first section of the watchband are avoided, the stress of the watchband during detection conforms to the actual working condition, the authenticity and reliability of the detection data are effectively improved, and detection errors caused by the fixing mode are avoided.

[0021] 2. By setting the chuck, the fixed sleeve, the actual use installation form of the watchband is simulated for fixation, so that the detection condition is closer to the real scene, compared with the conventional detection mode, the tensile property of the stainless steel watchband in the actual wearing process can be more accurately reflected, more effective data support is provided for product quality evaluation, and the reference value of the detection result is improved;

[0022] 3. By setting the protective cloth and the covering ring cloth, the protective cloth, the covering ring cloth and the magnetic type support rod structure are provided, so that the parts can be effectively collected when the watchband is broken, the parts are prevented from splashing and hurting people or falling into the chuck, meanwhile, the opening and closing design of the support rod facilitates the staff to quickly install and disassemble the watchband, the transparent protective material also facilitates real-time observation of the detection process, and safety and operation convenience are considered. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The whole structure of the tensile force detection device for the stainless steel watchband is shown in the schematic diagram Figure 1 ;

[0024] Figure 2 The whole structure of the tensile force detection device for the stainless steel watchband is shown in the schematic diagram Figure 2 ;

[0025] Figure 3 The tensile plate structure of the tensile force detection device for the stainless steel watchband is shown in the schematic diagram

[0026] Figure 4 The fixed sleeve structure of the tensile force detection device for the stainless steel watchband is shown in the schematic diagram

[0027] Figure 5 The Figure 4 enlarged structure schematic diagram of A in the

[0028] Figure 6 The internal structure of the chuck of the tensile force detection device for the stainless steel watchband is shown in the schematic diagram

[0029] Figure 7 The fixed sleeve, the chuck of the tensile force detection device for the stainless steel watchband is shown in the schematic diagram

[0030] Figure 8 The Figure 7 enlarged structure schematic diagram of B in the

[0031] Figure 9 The Figure 7 enlarged structure schematic diagram of C in the

[0032] In the figure: 11, test seat; 12, support; 13, top plate; 14, pull plate; 21, drive screw; 22, guide rod; 23, servo motor; 31, fixed sleeve; 32, chuck; 33, opening; 34, clamping plate; 35, insertion rod; 36, through hole; 37, cover plate; 41, shaft; 42, transmission gear; 43, transmission rack; 44, torsional spring; 45, accommodation opening; 51, drive rod; 52, drive rack; 53, guide opening I; 54, guide block I; 55, positioning rod; 56, fixed ring; 57, elastic sheet; 58, positioning ring; 61, support ring; 62, sliding ring; 63, support rod; 64, linkage rod; 65, support spring; 66, cover ring cloth; 67, protective cloth; 68, magnetic sheet; 69, guide opening II; 610, guide block II; 611, guide groove. DETAILED DESCRIPTION

[0033] 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, not all embodiments.

[0034] Reference Figures 1-3 A tension detection device for a stainless steel watchband, comprising a test seat 11 and a support 12 fixedly installed on the top surface of the test seat 11, a top plate 13 fixedly installed at the top end of the support 12, a pull plate 14 arranged on the inner side of the support 12, a drive mechanism arranged on the support 12 corresponding to the pull plate 14, a fixed sleeve 31 fixedly installed on the top surface of the pull plate 14 and the bottom surface of the top plate 13, and a chuck 32 fixedly installed at the opposite ends of the two fixed sleeves 31.

[0035] The drive mechanism comprises a drive screw 21 rotatably installed on one side of the inner wall of the support 12, a guide rod 22 fixedly installed on the other side of the inner wall of the support 12, one end of the pull plate 14 screwed with the drive screw 21 and the other end slidably connected with the guide rod 22, and a servo motor 23 fixedly installed on the top surface of the top plate 13 and fixedly connected with the top end of the drive screw 21.

[0036] The staff can fix the stainless steel watchband between the chucks 32 on the pull plate 14 and the top plate 13. When detecting, the servo motor 23 can be turned on to drive the drive screw 21 to rotate. One end of the pull plate 14 is screwed with the drive screw 21, and the other end is slidably connected with the guide rod 22. Therefore, when the drive screw 21 rotates, it can drive the pull plate 14 to slide along the guide rod 22, so as to continuously apply tension to the stainless steel watchband between the chucks 32, thereby enabling the stainless steel watchband to be subjected to tensile detection.

[0037] Reference Figure 3 , Figure 4 , Figure 6The inner side of the clamp head 32 is provided with a clamping assembly for fixing the end of the stainless steel watchband, the clamping assembly comprises two openings 33 symmetrically formed on the top surface of the clamp head 32, the inner walls of the two openings 33 are slidably provided with clamping plates 34, the opposite sides of the two clamping plates 34 are fixedly provided with insertion rods 35, the insertion rods 35 are made of high-strength metal material, the top surface of the clamp head 32 is provided with a through hole 36 in communication with the two openings 33, the side surface of the clamping plate 34 is fixedly provided with a cover plate 37 slidably connected with the inner wall of the through hole 36, the width of the cover plate 37 is the same as the width of the opening 33, and the inner side of the clamp head 32 is provided with a transmission structure corresponding to the two clamping plates 34;

[0038] The transmission structure comprises a shaft 41 rotatably installed on the inner wall of the clamp head 32, the outer wall of the shaft 41 is fixedly provided with a transmission gear 42, the bottom ends of the two clamping plates 34 are fixedly provided with transmission racks 43 engaged with the transmission gear 42, the width of the transmission gear 42 is at least greater than the width of the transmission rack 43, the end of the shaft 41 is provided with a torsional spring 44, and the two ends of the torsional spring 44 are fixedly connected with the shaft 41 and the clamp head 32 respectively, and the top surface of the clamp head 32 is provided with a gap 45;

[0039] The torsional spring 44 is in a compressed state in the initial state, when the transmission gear 42 is released from the limiting, the shaft 41 and the transmission gear 42 can rotate under the action of torsion force, and the transmission gear 42 and the transmission rack 43 are engaged to drive the transmission rack 43, the clamping plate 34 and the insertion rod 35 to slide along the opening 33, so that the insertion rod 35 is inserted into the mounting hole of the end of the watchband, and the clamping plate 34 can clamp the end of the watchband, so that the fixing of the end of the watchband can simulate the installation form of the watchband, the detection is closer to the actual situation, meanwhile, the clamping plate 34 does not need to clamp the watch link of the watchband with great force, and the accuracy of the detection is ensured, and in the sliding process of the clamping plate 34 along the opening 33, the cover plate 37 can slide in the through hole 36, so that the cover plate 37 can cover the opening 33, and the parts can be prevented from falling into the clamp head 32 when the watchband is pulled off in the tensile detection.

[0040] Referring to Figures 6-8 The inner side of the fixed sleeve 31 is provided with a linkage assembly for driving the clamping assembly to operate, the linkage assembly comprises a driving rod 51 slidably installed on the inner wall of the fixed sleeve 31, the top end of the driving rod 51 is fixedly provided with a driving rack 52 engaged with the transmission gear 42, the outer wall of the fixed sleeve 31 is provided with a guide opening one 53 corresponding to the bottom end of the driving rod 51, the bottom end of the driving rod 51 is fixedly provided with a guide block one 54, and the guide block one 54 is slidably connected with the guide opening one 53, the side surface of the guide block one 54 is fixedly provided with a positioning rod 55, and the outer wall of the fixed sleeve 31 is provided with a limiting mechanism corresponding to the positioning rod 55;

[0041] The limiting mechanism comprises a fixing ring 56 fixedly sleeved on the outer wall of the fixing sleeve 31 at a position below the guide opening I 53, a top surface of the fixing ring 56 is fixedly provided with an elastic sheet 57, and a top end of the elastic sheet 57 is fixedly provided with a positioning ring 58 matched with the positioning rod 55;

[0042] When the stainless steel watchband is fixed, the two ends of the stainless steel watchband can be fixed respectively, the end portions can be placed between the two clamping plates 34 on the clamping head 32 during the fixing, and the mounting holes of the end portions of the watchband are aligned with the insertion rods 35, then the positioning ring 58 can be actuated by the worker, and the positioning ring 58 can be moved out of the positioning rod 55 under the action of the elastic sheet 57, so that the limiting of the positioning rod 55 is released; since the driving rack 52 is engaged with the transmission gear 42, the driving rack 52 is also limited when the positioning rod 55 limits the driving rod 51, so that the transmission gear 42 is fixed; after the continuous tension test on the stainless steel watchband is completed, the worker can pull the positioning rod 55 downward, and the positioning rod 55 can be fixed by the positioning ring 58 when the positioning rod 55 is reset, and the two clamping plates 34 can be driven to move away from each other when the positioning rod 55 is pulled, and the insertion rods 35 move out of the mounting holes of the watchband.

[0043] Referring to Figure 3 , Figure 5 , Figure 9 , the outer side of the fixing sleeve 31 is provided with a protection assembly for protecting the detection process, the protection assembly comprises a supporting ring 61 fixedly sleeved on the outer wall of the fixing sleeve 31, a sliding ring 62 is slidingly sleeved on the outer wall of the fixing sleeve 31 at a position above the supporting ring 61, a plurality of supporting rods 63 are hingedly connected to the outer wall of the supporting ring 61 in a ring array, a plurality of linkage rods 64 are hingedly connected to the outer wall of the sliding ring 62 in a ring array, the bottom end of the linkage rod 64 is hingedly connected to the side surface of the supporting rod 63, and the support spring 65 is fixedly installed between the bottom surface of the sliding ring 62 and the top surface of the supporting ring 61, the outer wall of the clamping head 32 and the side surfaces of the plurality of supporting rods 63 are provided with a cover ring cloth 66, the opposite side surfaces of the plurality of supporting rods 63 are each provided with a protective cloth 67, the cover ring cloth 66 and the protective cloth 67 are each made of transparent material, the outer wall of the fixing sleeve 31 is provided with a guide opening II 69 corresponding to the sliding ring 62, the outer wall of the driving rod 51 is provided with a guide groove 611, the inner wall of the sliding ring 62 is fixedly provided with a guide block II 610, the guide block II 610 is slidingly connected to the inner walls of the guide opening II 69 and the guide groove 611, and the magnetic sheet 68 is movably installed at one end of the supporting rod 63 away from the supporting ring 61, and the opposite magnetic poles of the two magnetic sheets 68 at the same position are opposite;

[0044] When the driving rod 51 is released from the limit, the driving rod 51 slides upward under the action of the torsional spring 44, and the limit of the guide groove 611 on the guide block two 610 can also be released, and the sliding ring 62 can slide upward under the action of the supporting spring 65. Since the support rod 63 is hinged to the support ring 61, and the two ends of the linkage rod 64 are hinged to the sliding ring 62 and the support rod 63 respectively, when the sliding ring 62 slides upward, the support rod 63 can be pulled through the linkage rod 64, so that the support rod 63 can rotate in the direction of gathering, and the support rod 63 in the initial open state can gradually gather. The open state of the support rod 63 facilitates the fixing operation of the staff on the watchband, and when the support rod 63 gathers, the top end moves upward, so that the two support rods 63 on the top plate 13 and the pull plate 14 at the same vertical position can approach each other, and since the magnetic sheets 68 at the ends of the support rod 63 have opposite magnetic poles, the ends of the support rod 63 can be connected under the action of the magnetic force, so that the watchband is wrapped between the several protective cloths 67 and the two cover ring cloths 66. The servo motor 23 can drive the pull plate 14 to be opened. Since the tensile test stroke of the stainless steel watchband is usually short, and when the pull plate 14 moves, the two support rods 63 are connected through the magnetic sheet 68, so that the support rod 63 can continue to rotate in the direction of gathering. At this time, the sliding ring 62 can continue to slide upward, and the guide block two 610 can slide along the guide groove 611. The cover ring cloth 66 and the protective cloth 67 are made of transparent material, which facilitates the staff to observe the internal watchband. After the continuous tensile test on the stainless steel watchband is completed, the broken parts of the stainless steel watchband can fall onto the protective cloth 67 and the cover ring cloth 66, and the sliding ring 62 can slide downward to reset, and the support rod 63 is opened, so that the staff can collect the tested watchband.

[0045] The specific working principle of the present application is as follows:

[0046] In use, first, the staff can fix the stainless steel watchband between the clamps 32 on the pull plate 14 and the top plate 13, and when detecting, the servo motor 23 can be started to drive the driving screw 21 to rotate, one end of the pull plate 14 is screwed with the driving screw 21, and the other end is slidably connected with the guide rod 22, so that the driving screw 21 can drive the pull plate 14 to slide along the guide rod 22 to apply a continuous tension to the stainless steel watchband between the clamps 32, so as to detect the tensile resistance of the stainless steel watchband. When fixing the stainless steel watchband, the staff can fix the two ends of the stainless steel watchband respectively, and when fixing, the end portion can be placed between the two clamps 34 on the clamp 32, and the mounting hole at the end of the watchband can be aligned with the insertion rod 35, and then the staff can move the positioning ring 58, and the positioning ring 58 can move out of the positioning rod 55 under the action of the elastic sheet 57, so as to release the limit of the positioning rod 55;

[0047] When the positioning rod 55 limits the driving rod 51, the driving rack 52 is also limited, and the transmission gear 42 is fixed. When the driving rod 51 is released, the torsional spring 44 is in a compressed state, and the shaft 41 and the transmission gear 42 can rotate under the action of the torsional force. The transmission gear 42 meshes with the transmission rack 43 to drive the transmission rack 43, the clamping plate 34, and the insertion rod 35 to slide along the opening 33, so that the insertion rod 35 is inserted into the mounting hole of the watchband end, and the clamping plate 34 can clamp the end of the watchband, so that the fixing of the watchband end can simulate the installation form of the watchband, and the detection is closer to the actual situation. The clamping plate 34 does not need to clamp the watchband with great force, which ensures the accuracy of the detection. During the sliding process of the clamping plate 34 along the opening 33, the cover plate 37 can slide in the through hole 36, so that the cover plate 37 can cover the opening 33, avoiding that the parts fall into the chuck 32 when the watchband is pulled off during the tensile test.

[0048] When the driving rod 51 is released, the driving rod 51 slides upward under the action of the torsional spring 44, and the guide groove 611 can also release the limitation of the guide block two 610. The sliding ring 62 can slide upward under the action of the supporting spring 65. Since the support rods 63 are hinged to the support ring 61, and the two ends of the linkage rod 64 are hinged to the sliding ring 62 and the support rod 63, the sliding ring 62 can pull the support rod 63 through the linkage rod 64 when it slides upward, so that the support rods 63 can rotate in the direction of gathering, and the support rods 63 in the initial open state can gradually gather. The open state of the support rods 63 facilitates the fixing operation of the staff on the watchband. When the support rods 63 gather, the top ends move upward, so that the two support rods 63 on the same vertical position of the top plate 13 and the pull plate 14 can approach each other. Since the magnetic sheets 68 at the ends of the support rods 63 have opposite magnetic poles, the ends of the support rods 63 can be connected under the action of the magnetic force, and the watchband can be wrapped between the protective cloth 67 and the two cover cloth 66. The servo motor 23 can drive the pull plate 14 to open. Since the tensile test stroke of the stainless steel watchband is usually short, and the pull plate 14 moves, the two support rods 63 are connected through the magnetic sheet 68, so that the support rods 63 continue to rotate in the direction of gathering. At this time, the sliding ring 62 can continue to slide upward, and the guide block two 610 can slide along the guide groove 611. The cover cloth 66 and the protective cloth 67 are made of transparent material, which facilitates the observation of the staff on the internal watchband.

[0049] After the detection of the continuous pulling force applied to the stainless steel watchband is completed, the parts of the broken stainless steel watchband can fall on the protective cloth 67 and the cover ring cloth 66, and then the staff can pull the positioning rod 55 downward, and when the positioning rod 55 is reset, it can be fixed through the positioning ring 58, and when the positioning rod 55 is pulled, the two clamping plates 34 can be driven away from each other, the insertion rod 35 moves out of the mounting hole of the watchband, at the same time, the sliding ring 62 can slide downward for resetting, and the supporting rod 63 is opened, so that the staff can collect the tested watchband.

[0050] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A tension detection device for a stainless steel watchband, comprising a test seat and a support fixedly installed on the top surface of the test seat, a top plate fixedly installed on the top end of the support, a pull plate arranged on the inner side of the support, and a driving mechanism arranged on the support corresponding to the pull plate, characterized in that, The top surface of the pull plate and the bottom surface of the top plate are both fixedly installed with fixed sleeves, and opposite ends of the two fixed sleeves are both fixedly installed with collets; The driving mechanism comprises a driving screw rotatably installed on one side of the inner wall of the support, a guide rod is fixedly installed on the other side of the inner wall of the support, one end of the pull plate is screwed with the driving screw and the other end is slidably connected with the guide rod, and the top surface of the top plate is fixedly installed with a servo motor fixedly connected with the top end of the driving screw; The inner side of the collet is provided with a clamping assembly for fixing the end of the stainless steel watchband, the inner side of the fixed sleeve is provided with a linkage assembly for driving the clamping assembly to operate, and the outer side of the fixed sleeve is provided with a protection assembly for protecting the detection process. The clamping assembly comprises two openings symmetrically formed in the top surface of the collet, the inner walls of the two openings are both slidably installed with clamping plates, the opposite sides of the two clamping plates are both fixedly installed with insertion rods, the top surface of the collet is provided with a through hole communicating with the two openings, the side surface of the clamping plate is fixedly installed with a cover plate slidably connected with the inner wall of the through hole, and the inner side of the collet is provided with a transmission structure corresponding to the two clamping plates. The transmission structure comprises a shaft rotatably installed on the inner wall of the collet, a transmission gear is fixedly sleeved on the outer wall of the shaft, the bottom ends of the two clamping plates are both fixedly installed with transmission racks engaged with the transmission gear, the width of the transmission gear is at least greater than the width of the transmission rack, the end of the shaft is sleeved with a torsion spring, and the two ends of the torsion spring are respectively fixedly connected with the shaft and the collet, and the top surface of the collet is provided with a gap. The linkage assembly comprises a driving rod slidably installed on the inner wall of the fixed sleeve, a driving rack is fixedly installed on the top end of the driving rod and engaged with the transmission gear, a guide hole one is formed in the outer wall of the fixed sleeve corresponding to the bottom end of the driving rod, a guide block one is fixedly installed on the bottom end of the driving rod and slidably connected with the guide hole one, a positioning rod is fixedly installed on the side surface of the guide block one, and a limiting mechanism corresponding to the positioning rod is arranged on the outer wall of the fixed sleeve. The protection assembly comprises a support ring fixedly sleeved on the outer wall of the fixed sleeve, a sliding ring is slidably sleeved on the outer wall of the fixed sleeve at a position above the support ring, a plurality of support rods are hingedly connected to the outer wall of the support ring in an annular array, a plurality of linkage rods are hingedly connected to the outer wall of the sliding ring in an annular array, the bottom end of the linkage rod is hingedly connected to the side surface of the support rod, a support spring is fixedly installed between the bottom surface of the sliding ring and the top surface of the support ring, a cover ring cloth is arranged between the outer wall of the collet and the side surface of the plurality of support rods, a protective cloth is arranged between the opposite side surfaces of the plurality of support rods, a guide hole two corresponding to the sliding ring is formed in the outer wall of the fixed sleeve, a guide groove is formed in the outer wall of the driving rod, a guide block two is fixedly installed on the inner wall of the sliding ring and slidably connected with the inner wall of the guide hole two and the guide groove.

2. The tension detection device of a stainless steel watchband according to claim 1, wherein The width of the cover plate is the same as the width of the opening, and the insertion rod is made of high-strength metal material.

3. The tension detection device of a stainless steel watchband according to claim 1, wherein The limiting mechanism comprises a fixed ring fixedly sleeved on the outer wall of the fixed sleeve at a position below the guide hole, a spring sheet is fixedly installed on the top surface of the fixed ring, and a positioning ring adapted to the positioning rod is fixedly installed on the top end of the spring sheet.

4. The tension detection device of a stainless steel watchband according to claim 1, wherein The magnetic sheet is movably installed at the end of the supporting rod away from the supporting ring, and opposite magnetic poles of two magnetic sheets at the same position are opposite.

5. The tension detection device of a stainless steel watchband according to claim 1, wherein The covering cloth and the protective cloth are made of transparent material.

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