Zipper tooth detection device

Abstract

According to the zipper tooth detection device, a zipper head driving assembly comprises a movable frame, a connecting frame and a linear driver, the movable frame is in transmission connection with the linear driver through the connecting frame and is in sliding connection with the connecting frame, the movable frame and the zipper fixing direction are arranged in a crossed mode, and a zipper head clamping mechanism is arranged at the tail end of the movable frame; the fixed part is fixedly connected with a zipper head of a to-be-detected zipper; a first spring is further arranged between the movable frame and the connecting frame, and when the movable frame and the zipper head are fixed, the first spring can drive the movable frame to be pre-tightened in the direction of the front face or the back face of the zipper head. According to the zipper tooth detection device, when the movable frame is driven to move back and forth to execute the opening and closing action of the zipper, the first spring drives the movable frame to pull the zipper head outwards, the simulation effect on the actual use action of the zipper is improved, the test is more suitable for the actual application scene, and the test efficiency is improved. And the guiding capability of the test result in the aspects of zipper quality control and safety guarantee of related products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of zipper testing, and in particular to a zipper teeth detection device. Background Art

[0002] Zipper physical property testing is a key link in ensuring the quality and reliability of zippers, and plays a vital role in the production, quality control and safety of zippers and related products.

[0003] In the existing technology, the testing method usually fixes the two ends of the zipper and tightens it, then pulls the zipper head back and forth in a straight line along the zipper direction. During the test, the zipper teeth are observed to see if they are worn or deformed, if the zipper head is loose or damaged, and if the fabric tape is broken or untied.

[0004] However, in the actual use of zippers, the movement of the zipper head is not a standard straight line. When opening and closing the zipper, the zipper head is usually pulled outward, causing the zipper to be bent. The edges of the zipper head at both ends will contact the zipper teeth, causing additional wear, making the actual wear degree of the zipper in a single opening and closing greater than the wear degree in the test. There is a deviation between the test results and the actual performance, and there is insufficient guidance for the quality control of zippers and the safety assurance of related products. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a zipper teeth detection device to solve the problem that the test results in the prior art deviate from the actual performance, and that the guidance capability for the quality control of zippers and the safety assurance of related products is insufficient.

[0006] The present invention provides a zipper teeth detection device, comprising: a base, and a mounting plate uprightly fixed on the base, and: A first fixing assembly and a second fixing assembly are provided on the mounting plate, wherein the first fixing assembly and the second fixing assembly are spaced apart along a first direction of the mounting plate and are respectively used to fix two ends of the zipper to be tested; The zipper head drive assembly is used to pull the zipper head to move back and forth along the first direction. The zipper head drive assembly includes a movable frame, a connecting frame and a linear drive, wherein: The linear drive is fixedly arranged on the base, and the movable direction of the linear drive is parallel to the first direction; The connecting frame is fixedly connected to the movable end of the linear actuator; The movable frame is slidably connected to the connecting frame, the movable frame is arranged to cross the first direction, and a zipper head clamping mechanism is provided at the end of the movable frame for fixedly connecting with the zipper head of the zipper to be tested; A first spring is further provided between the movable frame and the connecting frame, so as to drive the movable frame to be pre-tightened toward the front or back side of the zipper head when the movable frame is fixed to the zipper head.

[0007] Optionally, the second fixing assembly includes a mounting frame, a zipper clip and a screw rod, wherein: The mounting frame is fixedly arranged on the mounting plate, the screw rod is rotatably arranged on the mounting frame, and the zipper clip is slidably arranged on the mounting frame along the first direction; The zipper clip can also be movably sleeved on the screw rod and threadedly connected to the screw rod, so that when the screw rod rotates, the zipper clip can be driven to approach or move away from the first fixing component along the first direction.

[0008] Optionally, the zipper head drive assembly further includes a reset frame, the reset frame being fixed to the mounting plate and the base and extending along the first direction, the reset frame including a reset section, a connecting section and a limiting section, and being arranged in a direction from the first fixing assembly to the second fixing assembly, with the connecting section being arranged obliquely; The movable frame is further provided with a matching portion, which is slidably matched with the reset frame so that when the movable frame moves along the first direction and moves to the reset section through the connecting section, it can be reset by the limiting of the matching portion and the reset frame, so that the zipper head clamping mechanism approaches the first fixed component along the perpendicular direction of the mounting plate.

[0009] Optionally, it further includes: a screw drive module, which is transmission-connected to the linear drive and the screw, and is used to synchronously drive the screw to rotate during a driving cycle of the linear drive.

[0010] Optionally, the screw drive module includes a first functional rod, a second functional rod and a movable block, wherein: The first functional rod and the second functional rod are fixed on the base; The second functional rod is further provided with a guide rod, the movable block is sleeved on the guide rod, and a second spring is further provided between the movable block and the second functional rod; The movable block is arranged on the moving path of the movable frame along the first direction and matches the inclined surface of the movable frame, so that the movable block is driven to slide along the guide rod through the contact between the movable frame and the inclined surface of the movable block; The movable block is provided with a rack, the first functional rod is provided with a one-way bearing, the inner ring of the one-way bearing is fixed with a rotating shaft, the rotating shaft is transmission-connected to the screw, and the outer ring of the one-way bearing is fixed with a gear meshing with the rack; The screw rod is a reciprocating screw rod.

[0011] Optionally, the rotating shaft and the screw rod are connected via a belt or chain transmission, and a protective cover is provided between the rotating shaft and the screw rod, and the belt or the chain is provided in the protective cover.

[0012] Optionally, a protective shell is further included, which is arranged on the back of the mounting plate, the first fixing component and the second fixing component are arranged on the front of the mounting plate, the movable frame is arranged through the mounting plate, and the connecting frame and the linear drive are arranged in the protective shell.

[0013] Optionally, the linear drive comprises a cylinder.

[0014] The zipper teeth detection device provided by the present invention includes a base and a mounting plate upright fixed on the base, wherein a first fixing assembly and a second fixing assembly are arranged on the mounting plate at intervals along a first direction, respectively used for fixing the two ends of the zipper to be tested; the zipper head driving assembly is used to pull the zipper head back and forth along the first direction, and the zipper head driving assembly includes a movable frame, a connecting frame and a linear driver, wherein the movable frame is transmission-connected to the linear driver through the connecting frame and is slidably connected to the connecting frame, the movable frame is arranged crosswise with the first direction, and a zipper head clamping mechanism is provided at the end of the movable frame for fixed connection with the zipper head of the zipper to be tested; a first spring is also provided between the movable frame and the connecting frame, so that when the movable frame is fixed to the zipper head, the movable frame can be driven to pre-tighten toward the front or back direction of the zipper head. When the zipper teeth detection device of the present invention drives the movable frame to move back and forth in the first direction to perform the opening and closing action of the zipper, it also drives the movable frame to pull the zipper head outward through the first spring, thereby improving the simulation effect of the actual use action of the zipper, making the test more in line with the actual application scenario, and improving the test results' ability to guide the quality control of the zipper and the safety assurance of related products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the external structure of a zipper teeth detection device in an embodiment of the present invention; Figure 2 Schematic diagram of the first part of the structure of the zipper teeth detection device in an embodiment of the present invention; Figure 3 2 is a schematic structural diagram of the second part of the zipper teeth detection device in an embodiment of the present invention; Figure 4 Schematic diagram of the partial structure of the screw drive module of the zipper teeth detection device in an embodiment of the present invention.

[0016] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0017] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] In order to solve the problem that the test results in the prior art deviate from the actual performance, and the guidance capability for the quality control of zippers and the safety assurance of related products is insufficient, the present invention provides a zipper teeth detection device, comprising a base, and a mounting plate uprightly fixed on the base, wherein a first fixing assembly and a second fixing assembly are spaced apart along a first direction on the mounting plate, respectively used for fixing the two ends of the zipper to be tested; a zipper head driving assembly is used for pulling the zipper head back and forth along the first direction, and the zipper head driving assembly comprises a movable frame, a connecting frame and a linear driver, wherein the movable frame is connected to the linear driver through the connecting frame and is slidably connected to the connecting frame, the movable frame is arranged crosswise with the first direction, and a zipper head clamping mechanism is provided at the end of the movable frame for fixed connection with the zipper head of the zipper to be tested; a first spring is further provided between the movable frame and the connecting frame, so as to drive the movable frame to be pre-tightened toward the front or back of the zipper head when the movable frame is fixed to the zipper head. When the movable frame is driven to move back and forth in the first direction to perform the opening and closing action of the zipper, the first spring is also used to drive the movable frame to pull the zipper head outward, thereby improving the simulation effect of the actual use action of the zipper, making the test more in line with the actual application scenario, and improving the test results' ability to guide the quality control of the zipper and the safety assurance of related products.

[0021] Specifically, if Figure 1 、 Figure 2 and Figure 3As shown, the zipper teeth testing device of this embodiment includes a base 100 and a mounting plate 110 vertically fixed to the base 100. A first fixing assembly 130 and a second fixing assembly are disposed on the front surface of the mounting plate 110. The first fixing assembly 130 and the second fixing assembly are spaced apart along a first direction of the mounting plate 110 and are respectively used to secure the ends of the zipper 10 to be tested. In this embodiment, the first fixing assembly 130 and the second fixing assembly are spaced apart vertically. In alternative embodiments, they can also be spaced apart horizontally to simulate installation and usage postures in different application scenarios.

[0022] The zipper head driving assembly is used to pull the zipper head 11 back and forth along a first direction fixed to the zipper 10 to simulate the opening and closing action of the zipper 10.

[0023] The zipper head drive assembly includes a movable frame 141, a connecting frame 142 and a linear driver 143, wherein the linear driver 143 is fixedly set on the base 100, and the movable direction of the linear driver 142 is parallel to the first direction; the connecting frame 142 is fixedly connected to the movable end of the linear driver 143; the movable frame 141 is slidably connected to the connecting frame 142, and the movable frame 141 is arranged crosswise with the first direction. In this embodiment, it is arranged perpendicular to the mounting plate 110, and a zipper head clamping mechanism is provided at the end of the movable frame 141 for fixed connection with the zipper head 11 of the zipper 10.

[0024] In this embodiment, the zipper head clamping mechanism is mainly detachably fixedly connected to the zipper head 11 by clamping the handle of the zipper head 11. The specific structure of the zipper head clamping mechanism can be specifically designed according to the handle structure of the zipper head 11. For example, the handle includes a ring structure, and the zipper head clamping mechanism can be provided with a positioning column and other structures to cooperate with the ring structure to improve the fixing effect with the handle.

[0025] A first spring 144 is further provided between the movable frame 141 and the connecting frame 142 so that when the movable frame 141 is fixed to the zipper head 11, the movable frame 141 can be driven to be pre-tightened toward the front or back of the zipper head 11. In the present embodiment, the movable frame 141 is pre-tightened toward the front of the zipper head 11, that is, while the zipper head 11 is pulled up and down, the movable frame 141 is also pre-tightened outward perpendicularly to the mounting plate 110 to pull the zipper head 11 outward.

[0026] Taking into account that the zipper is not in a straight and taut state in some scenarios, in this embodiment, the second fixing component includes a mounting frame 122, a zipper clip 121 and a screw rod 124. The mounting frame 122 is fixedly set on the mounting plate 110, and the screw rod 124 is rotatably set on the mounting frame 122. The zipper clip 121 is used to fix the fabric surface of the zipper 10. The zipper clip 121 is slidably set on the mounting frame 122 along the first direction. The zipper clip 121 can also be movably mounted on the screw rod 124 and threadedly connected to the screw rod 124, so that when the screw rod 124 rotates, the zipper clip 121 can be driven to approach or move away from the first fixing component 130 along the first direction.

[0027] By adjusting the distance between the zipper clip 121 and the first fixing component 121 and coordinating with the external pull pre-tightening of the movable frame 141, the zipper 10 can be tensioned in different bending states, simulating different usage scenarios, improving the test coverage, and improving the test effect.

[0028] When the zipper 10 is tensioned and bent, the zipper head clamping mechanism at the end of the movable frame 141 pre-tightens the zipper head 11 outward, causing the zipper head 11 to be further away from the mounting plate 110 than at the ends of the zipper 10. Correspondingly, the zipper head clamping mechanism at the end of the movable frame 141 is also further away from the mounting plate 110. In the initial state, the zipper head 11 is generally located at the end of the zipper 10. To facilitate the connection between the zipper head clamping mechanism and the zipper head 11, the zipper head clamping mechanism needs to be pressed toward the mounting plate 110 to match the position of the zipper head 11.

[0029] To facilitate the connection operation between the zipper head clamping mechanism and the zipper head 11, in this embodiment, the zipper head driving assembly also includes a reset frame 145, which is fixed to the mounting plate 110 and the base 100 and extends along the first direction. The reset frame 145 includes a reset section, a connecting section and a limiting section, and is arranged once in the direction of the first fixing component 130 pointing to the second fixing component, and the connecting section is inclined; a matching portion is also provided on the movable frame 141, and the matching portion slides and matches with the reset frame 145, so that when the movable frame 141 moves along the first direction and moves to the reset section through the connecting section, it can be reset by the matching portion and the limiting of the reset frame 145, so that the zipper head clamping mechanism approaches the first fixing component 130 along the vertical direction of the mounting plate 110, thereby eliminating the need to manually press the movable frame 141, thereby facilitating the connection operation between the zipper head clamping mechanism and the zipper head 11.

[0030] In this embodiment, the mating portion is a protrusion extending laterally from the rear end of the movable frame 141, and the protrusion contacts and matches with the reset frame 145. When the movable frame 141 moves upward to the limiting section of the reset frame 145, according to the protrusion amount of the movable frame 141 toward the front of the mounting plate 110, the protrusion and the reset frame 145 are generally matched at a distance to ensure that the first spring 144 is fully contracted, so that the movable frame 141 exerts an outward pre-tightening force on the zipper head 11.

[0031] In order to realize automatic adjustment of the distance between the first fixed component and the second fixed component, this embodiment also includes: a screw drive module, which is transmission-connected to the linear driver 143 and the screw 124, and is used to synchronously drive the screw 124 to rotate during a driving cycle of the linear driver 143, thereby reciprocatingly pulling the zipper head 11, and automatically adjusting the distance between the two ends of the zipper 10, and automatically adjusting the bending degree of the zipper 10 during the test, simulating the dynamic characteristics of the zipper 10 in actual use.

[0032] Specifically, if Figure 3 and Figure 4 As shown, the screw drive module includes a first functional rod 151, a second functional rod 152 and a movable block 153, wherein the first functional rod 151 and the second functional rod 152 are uprightly fixed on the base 100; a guide rod 1521 is further provided on the second functional rod 152, and the movable block 153 is sleeved on the guide rod 1521. A second spring 1522 is further provided between the movable block 153 and the second functional rod 152, so that the movable block 153 can slide along the guide rod 1521; the movable block 153 is set on the movable frame 141 along the first The movable block 153 is driven to slide along the guide rod 1521 by contacting the movable block 153 with the inclined surface of the movable frame 141. The movable block 153 is provided with a rack 155, and the first functional rod 151 is provided with a one-way bearing (not shown in the figure). The inner ring of the one-way bearing is fixed with a rotating shaft 156, and the rotating shaft 156 is connected to the screw rod 124 for transmission. The outer ring of the one-way bearing is fixed with a gear 154 that meshes with the rack 155. The screw rod 124 is a reciprocating screw rod.

[0033] In this embodiment, the inclined surface of the movable block 153 is set at the top. When the movable frame 141 moves from top to bottom and passes through the inclined surface of the movable block 153, the movable block 153 can be pushed away by the inclined surface, and at the same time, the rack 155 is driven to move by the movable block 153, and then the one-way bearing is driven to rotate through the rack 155 and the gear 154, and the one-way bearing drives the rotating shaft 156 to rotate. Through the transmission of the rotating shaft 156, the screw rod 124 is driven to rotate. The screw rod 124 rotates a certain angle, driving the zipper clip 121 to move up or down.

[0034] After the movable frame 141 moves away from the movable block 153 area, the second spring 1522 pushes the movable block 153 to return to its original position. The rack 155 returns to its original position to drive the gear 154 to rotate. Only the outer ring of the one-way bearing rotates, thereby positioning the zipper clip 121 at the moved position.

[0035] Each time the movable frame 141 reciprocates once, the screw drive module synchronously drives the zipper clamp 121 to move once. Through the action of the reciprocating screw, the position of the zipper clamp 121 cycles between the upper and lower limit positions.

[0036] In this embodiment, the movable block 153 is positioned at the end of the zipper 10. This prevents a sudden change in the tension and relaxation of the zipper 10 during a single cycle test, ensuring test consistency. The position of the movable block 153 and the placement of its inclined surface can be adjusted based on specific needs.

[0037] In this embodiment, movable block 153 is also positioned at the connection section of reset frame 145 and is flush with the outer surface of the reset section of reset frame 145. This allows the mating portion to move from the reset section of reset frame 145 to movable block 153 as movable frame 141 moves upward from the reset section, and then vertically transitions through movable block 153 to the limiting section of reset frame 145. The lower portion of movable block 153 is also positioned to fit within the connection section of reset frame 145, allowing reset frame 145 to guide and limit the movement of movable block 153, thereby improving the reliability of movable block 153's movement. This also enhances the compactness of component layout and improves space utilization.

[0038] In order to realize the rotation between the rotating shaft 156 and the screw rod 124, in this embodiment, the rotating shaft 156 and the screw rod 124 are connected by a belt transmission. Figure 1 As shown, a protective cover 102 is further provided between the rotating shaft 156 and the screw rod 124, and the belt is provided in the protective cover 102. In an optional embodiment, the connection can also be achieved through a chain transmission.

[0039] The screw rod 124 is also connected to the knob 123 for manually rotating the screw rod 124 to adjust the position of the zipper clip 121. It can be used to adjust the initial position of the zipper clip 121 and adjust the tension of the zipper 10 to a predetermined state in a fixed position test.

[0040] In order to ensure the working reliability of the above-mentioned movable parts and avoid external interference, in this embodiment, a protective shell 101 is also included. The protective shell 101 is arranged on the back of the mounting plate 110, the first fixing component 130 and the second fixing component are arranged on the front of the mounting plate 110, the movable frame 141 is arranged through the mounting plate 110, and the connecting frame 142 and the linear drive 143, as well as the main components of the screw drive module are all arranged in the protective shell 101.

[0041] For the convenience of linear drive, the linear actuator 143 includes a cylinder to meet the driving requirements. A linear motor can also be selected to drive the speed block. The type of linear actuator 143 can be selected according to specific needs.

[0042] The zipper teeth detection device provided by the present invention includes a base and a mounting plate upright fixed on the base, wherein a first fixing assembly and a second fixing assembly are arranged on the mounting plate at intervals along a first direction, respectively used for fixing the two ends of the zipper to be tested; the zipper head driving assembly is used to pull the zipper head back and forth along the first direction, and the zipper head driving assembly includes a movable frame, a connecting frame and a linear driver, wherein the movable frame is transmission-connected to the linear driver through the connecting frame and is slidably connected to the connecting frame, the movable frame is arranged crosswise with the first direction, and a zipper head clamping mechanism is provided at the end of the movable frame for fixed connection with the zipper head of the zipper to be tested; a first spring is also provided between the movable frame and the connecting frame, so that when the movable frame is fixed to the zipper head, the movable frame can be driven to pre-tighten toward the front or back direction of the zipper head. When the zipper teeth detection device of the present invention drives the movable frame to move back and forth in the first direction to perform the opening and closing action of the zipper, it also drives the movable frame to pull the zipper head outward through the first spring, thereby improving the simulation effect of the actual use action of the zipper, making the test more in line with the actual application scenario, and improving the test results' ability to guide the quality control of the zipper and the safety assurance of related products.

[0043] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0044] The above-described embodiments merely represent several specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A zipper teeth detection device, characterized in that: include: A base, and a mounting plate uprightly fixed to the base, and: A first fixing assembly and a second fixing assembly are provided on the mounting plate, wherein the first fixing assembly and the second fixing assembly are spaced apart along a first direction of the mounting plate and are respectively used to fix two ends of the zipper to be tested; The zipper head drive assembly is used to pull the zipper head to move back and forth along the first direction. The zipper head drive assembly includes a movable frame, a connecting frame and a linear drive, wherein: The linear drive is fixedly arranged on the base, and the movable direction of the linear drive is parallel to the first direction; The connecting frame is fixedly connected to the movable end of the linear actuator; The movable frame is slidably connected to the connecting frame, the movable frame is arranged to cross the first direction, and a zipper head clamping mechanism is provided at the end of the movable frame for fixedly connecting with the zipper head of the zipper to be tested; A first spring is further provided between the movable frame and the connecting frame, so as to drive the movable frame to be pre-tightened toward the front or back side of the zipper head when the movable frame is fixed to the zipper head.

2. The zipper teeth detection device according to claim 1, characterized in that: The second fixing assembly includes a mounting frame, a zipper clip and a screw rod, wherein: The mounting frame is fixedly arranged on the mounting plate, the screw rod is rotatably arranged on the mounting frame, and the zipper clip is slidably arranged on the mounting frame along the first direction; The zipper clip can also be movably sleeved on the screw rod and threadedly connected to the screw rod, so that when the screw rod rotates, the zipper clip can be driven to approach or move away from the first fixing component along the first direction.

3. The zipper teeth detection device according to claim 2, characterized in that: The zipper head drive assembly further includes a reset frame, which is fixed to the mounting plate and the base and extends along the first direction. The reset frame includes a reset section, a connecting section, and a limiting section, and is arranged in a direction from the first fixing assembly to the second fixing assembly, and the connecting section is arranged obliquely. The movable frame is further provided with a matching portion, which is slidably matched with the reset frame so that when the movable frame moves along the first direction and moves to the reset section through the connecting section, it can be reset by the limiting of the matching portion and the reset frame, so that the zipper head clamping mechanism approaches the first fixed component along the perpendicular direction of the mounting plate.

4. The zipper teeth detection device according to claim 2, characterized in that: Also includes: A screw drive module is connected to the linear drive and the screw for synchronously driving the screw to rotate during a driving cycle of the linear drive.

5. The zipper teeth detection device according to claim 4, characterized in that: The screw drive module includes a first functional rod, a second functional rod and a movable block, wherein: The first functional rod and the second functional rod are fixed on the base; The second functional rod is further provided with a guide rod, the movable block is sleeved on the guide rod, and a second spring is further provided between the movable block and the second functional rod; The movable block is arranged on the moving path of the movable frame along the first direction and matches the inclined surface of the movable frame, so that the movable block is driven to slide along the guide rod through the contact between the movable frame and the inclined surface of the movable block; The movable block is provided with a rack, the first functional rod is provided with a one-way bearing, the inner ring of the one-way bearing is fixed with a rotating shaft, the rotating shaft is transmission-connected to the screw, and the outer ring of the one-way bearing is fixed with a gear meshing with the rack; The screw rod is a reciprocating screw rod.

6. The zipper teeth detection device according to claim 4, characterized in that: The rotating shaft and the screw rod are connected via a belt or chain transmission, and a protective cover is provided between the rotating shaft and the screw rod, and the belt or the chain is provided in the protective cover.

7. The zipper teeth detection device according to any one of claims 1 to 6, characterized in that: It also includes a protective shell, which is arranged on the back of the mounting plate, the first fixing component and the second fixing component are arranged on the front of the mounting plate, the movable frame is arranged through the mounting plate, and the connecting frame and the linear drive are arranged in the protective shell.

8. The zipper teeth detection device according to claim 1, characterized in that: The linear actuator includes a cylinder.

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