CN220603340U

CN220603340U - Pulse generating mechanism and defect detecting device

Info

Publication number: CN220603340U
Application number: CN202322216764.1U
Authority: CN
Inventors: 龙万平; 袁成龙
Original assignee: Huaxingyuanchuang Chengdu Technology Co ltd
Current assignee: Huaxingyuanchuang Chengdu Technology Co ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-03-15
Anticipated expiration: 2033-08-17

Abstract

The present application relates to a pulse generating mechanism and a defect detecting apparatus. The defect detection equipment comprises a conveying line, a detection element and a pulse generation mechanism, wherein the conveying line is provided with a detection station, the detection element is arranged on the corresponding detection station, the pulse generation mechanism is arranged at the position of the conveying line, which is located at the detection station, the pulse generation mechanism comprises a driving source, a driven shaft and an encoder coaxially connected with the driven shaft, the driven shaft is detachably connected with the driving source through a one-way transmission assembly, the one-way transmission assembly is configured to enable the driven shaft to rotate around the central axis of the driven shaft when the driving source is started, and enable the driven shaft to be disconnected from the driving source when the driving source stops driving, so that the driven shaft can be stopped after continuously rotating for a plurality of circles relative to the driving source under the action of inertia, and therefore, when the equipment is stopped suddenly, the encoder can still generate pulses to trigger the detection element to detect a panel to be detected, and the occurrence of detection omission is reduced.

Description

Pulse generating mechanism and defect detecting device

Technical Field

The application relates to the technical field of surface visual inspection, in particular to a pulse generating mechanism and defect detection equipment.

Background

With the rapid development of 3C electronic products, especially the rapid development of mobile phone design and production technology, glass panels with transparent and smooth sensory properties are widely used in display screen devices of 3C electronic products, such as mobile phones, smart watches, vehicle-mounted display screens and displays, which all require glass panels. The appearance quality of the glass panel directly influences the quality of electronic products, along with the increasing requirements of consumers on the quality of the electronic products, the defect detection requirements on the glass panel are also increased, and for some application occasions with higher requirements, such as mobile phone cover plate glass, the defect of micron-sized particles needs to be detected, so the defect detection of the glass panel is an important link in the production process of the electronic products.

When defect detection is carried out, a plurality of driving wheels are driven by a servo motor to sequentially arrange to form a driving wheel group to rotate around the central axis of the driving wheel group, the driving wheels are used for driving the glass panel to advance through friction, and along with the rotation of the driving wheels, an encoder arranged on the driving wheels also follows rotation, so that the encoder generates pulses, and one or more pulses trigger a camera to photograph the glass panel for defect detection. However, in practice, it is found that when the inspection apparatus is suddenly stopped, the rotation of the driving wheel is suddenly stopped, the rotation of the encoder is immediately stopped, and at this moment, the glass panel is not immediately stopped to advance but is continuously moved forward for a certain distance due to inertia, in which case the glass panel is likely to fly forward rapidly due to inertia to cause damage to the product, and the rotation of the encoder is stopped without pulse generation, so that the camera cannot continue photographing the glass panel, and thus, a partial region of the glass panel is missed.

Disclosure of Invention

In view of this, it is necessary to provide a pulse generating mechanism capable of overcoming the above-mentioned problems and a defect detecting apparatus including the same, in order to solve the problems in the prior art that the glass panel is easily broken due to rapid flying-out of the glass panel by inertia at the time of a sudden stop, and that a partial region of the glass panel is missed due to no pulse output of an encoder.

According to one aspect of the present application, there is provided a pulse generating mechanism comprising:

a driving source;

the driven shaft is detachably connected to the driving source in a transmission way through a one-way transmission assembly, and the one-way transmission assembly is configured to enable the driven shaft to rotate around a central axis of the driven shaft when the driving source is started and enable the driven shaft to be disconnected from the driving source in transmission at the moment when the driving source stops driving;

an encoder coaxially coupled to the driven shaft, the encoder configured to rotate with the driven shaft and generate pulses when rotated.

In one embodiment, the unidirectional transmission assembly comprises a driving shaft coaxially arranged with the driven shaft, one end of the driving shaft is in transmission connection with the driving source, and the other end of the driving shaft is connected with the driven shaft.

In one embodiment, the unidirectional transmission assembly further comprises a ratchet wheel and a pawl, the ratchet wheel is coaxially sleeved on the driving shaft, the ratchet wheel is provided with a plurality of ratchet teeth which are sequentially arranged along the circumferential direction of the ratchet wheel, each two adjacent ratchet teeth are formed with tooth grooves, and one end of the pawl is elastically clamped in the tooth grooves.

In one embodiment, the driving shaft and the driven shaft are integrally connected, the unidirectional transmission assembly further comprises a first transmission wheel and a second transmission wheel which are respectively provided with magnetism, the first transmission wheel and the second transmission wheel are arranged at intervals, the first transmission wheel is in transmission connection with the driving source, and the second transmission wheel is coaxially connected with the driving shaft;

the first driving wheel can rotate around the central axis of the first driving wheel under the driving of the driving source and can generate magnetic force with the second driving wheel when rotating, so that the second driving wheel, the driving shaft, the driven shaft and the encoder are driven by the magnetic force to synchronously rotate around the central axis of the first driving wheel, the driven shaft and the encoder together.

In one embodiment, the pulse generating mechanism further comprises a fixing base, and one end of the pawl away from the ratchet wheel is fixedly connected to the fixing base.

In one embodiment, the pulse generating mechanism further comprises a driven wheel, and the driven wheel is coaxially sleeved on the driven shaft.

In one embodiment, the pulse generating mechanism further comprises a driven wheel, the driven wheel is coaxially sleeved on the driven wheel, one end of the pawl is connected with the driven wheel, the opposite end of the pawl is clamped in tooth grooves formed by two adjacent ratchets, and the pawl can rotate around one end connected with the driven wheel after being separated from the tooth grooves;

the driving shaft and the driven shaft are connected with each other through the ratchet wheel and the pawl, when the driving shaft stops rotating, the pawl is clamped at one end of the tooth slot and can cross the ratchet under the action of inertia, so that the driven shaft and the driven shaft can rotate for a plurality of circles together relative to the driving shaft and then stop.

In one embodiment, the diameter of the driven wheel is larger than that of the ratchet wheel, and one end of the pawl away from the ratchet wheel is connected to one side of the driven wheel, which is close to the ratchet wheel in the axial direction of the driven wheel.

In one embodiment, the pulse generating mechanism further comprises a bearing seat and a bearing, the bearing is arranged in the bearing seat, the driving shaft penetrates through the bearing and the bearing seat, and the driving shaft is connected to the bearing seat through the bearing.

According to another aspect of the present application, there is provided a defect detection apparatus comprising a conveyor line arranged along a conveying direction, the conveyor line having at least one detection station, at least one detection element arranged on a corresponding detection station, and a pulse generating mechanism arranged such that the conveyor line is located at the position of each detection station, an encoder of the pulse generating mechanism being capable of triggering the detection element to detect a panel to be detected when a pulse is generated.

The pulse generating mechanism is characterized in that the driven shaft is connected to the driving source through the unidirectional transmission assembly in a transmission way, and the unidirectional transmission assembly is configured to enable the driven shaft to rotate around the central axis of the driven shaft when the driving source is started, and enable the driven shaft to continuously rotate for a plurality of circles relative to the driving source under the action of inertia at the moment when the driving source stops driving. When the defect detection equipment is stopped suddenly, although the driving source stops driving, the driven shaft still can continuously drive the panel to be detected to move forwards for a certain distance under the action of inertia, so that the encoder connected to the driven shaft still can generate pulses to trigger the detection element of the defect detection equipment to detect the panel to be detected, and the condition of missing detection is reduced or avoided; and the condition that the panel to be detected is damaged due to the fact that the panel to be detected flies forward rapidly due to inertia can be avoided.

Drawings

Fig. 1 is an isometric view of a defect detection apparatus according to an embodiment of the present application.

Fig. 2 is a schematic view of a glass panel according to an embodiment of the present disclosure when conveyed by a conveyor line.

Fig. 3 is an isometric view of a pulse generating mechanism provided in an embodiment of the present application.

Fig. 4 is a cross-sectional view of a pulse generating mechanism according to an embodiment of the present application.

Fig. 5 is a cross-sectional view of a pulse generating mechanism according to another embodiment of the present application.

Reference numerals illustrate:

10. a defect detection device; 100. a conveying line; 101. a surface inspection station; 102. a side checking station; 103. rechecking stations; 110. a conveying roller; 200. a detection element; 300. a pulse generating mechanism; 310. a driven shaft; 320. an encoder; 330. a unidirectional transmission assembly; 331. a driving shaft; 332. a second driving wheel; 333. a ratchet wheel; 334. a pawl; 340. a bearing seat; 350. a bearing; 360. driven wheel; 40. a glass panel.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The application provides a pulse generating mechanism and defect detection equipment, wherein the defect detection equipment comprises the pulse generating mechanism, and the defect detection equipment is used for detecting the surface quality of a large-size flat panel to be detected so as to ensure the reliable quality of products and prevent defective products from flowing into a rear-end process to cause larger waste; the pulse generating mechanism is used for generating pulses when the panel to be detected passes through the detection station, so that the detection element can be triggered to detect the defects of the panel to be detected.

The structure of the pulse generating mechanism and a part of the structure of the defect detecting apparatus in the present application will be described below taking a glass panel in which the panel to be detected is a large size as an example. It will be appreciated that in other embodiments, the visual inspection apparatus of the present application is not limited to glass panels, but may be used to inspect any other large-sized plate-like product to be inspected, such as various substrates, panels, etc., and is not limited thereto.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a defect detecting apparatus 10 in an embodiment of the present application, where the defect detecting apparatus 10 provided in an embodiment of the present application includes a conveying line 100, a detecting element 200 and a pulse generating mechanism 300 (not shown in fig. 1) disposed along a conveying direction, where the conveying line 100 has at least one detecting station, and in the embodiment shown in the figure, the detecting station has a plurality of detecting elements, respectively, a surface detecting station 101, an edge detecting station 102 and a re-detecting station 103, and correspondingly, the detecting element 200 has a plurality of detecting elements 200 disposed at the surface detecting station 101, the edge detecting station 102 and the re-detecting station 103, respectively, and the detecting element 200 disposed at the surface detecting station 101 is used for performing surface detection on a glass panel, that is, performing defect detection on a front surface, a back surface and an interior of the glass panel; the detecting element 200 is arranged at the edge detecting station 102 and is used for detecting defects on the edge of the glass panel; the inspection element 200 provided at the rechecking station 103 is used for rechecking the front and back surfaces of the glass panel and internal defects. A pulse generating mechanism 300 is provided at the position of the conveyor line 100 at each inspection station for generating pulses to trigger the inspection element 200 to inspect the glass panel for defects. In some embodiments, the detection element 200 may be a visual detection camera capable of detecting defects of the glass panel by photographing the glass panel 40.

Specifically, in one embodiment, as shown in fig. 2, the conveying line 100 includes a plurality of conveying rollers 110 sequentially arranged along the conveying direction, wherein one conveying roller 110 is connected to a servo motor, and the conveying rollers 110 can rotate around their central axes under the driving of the servo motor, and drive the glass panel 40 placed on the conveying rollers 110 to move forward, and drive other conveying rollers 110 to rotate around their central axes, so as to continuously drive the glass panel 40 to convey forward along the conveying direction, and the pulse generating mechanism 300 is disposed on one of the conveying rollers 110 at each detection station.

It should be understood that, in the defect inspection apparatus 10, the conveying line 100 may have only one inspection station, that is, only the surface inspection station 101 or the side inspection station 102 is provided, and the number of the corresponding inspection elements 200 is not limited, or may be more than two inspection stations, and the number of the corresponding inspection elements 200 is more than two, which is not particularly limited.

More specifically, as shown in fig. 2 and 3, the pulse generating mechanism 300 includes a driving source (not shown), a driven shaft 310, and an encoder 320, wherein one end of the driven shaft 310 is drivingly connected to the driving source, the encoder 320 is coaxially connected to one end of the driven shaft 310 remote from the driving source, and the encoder 320 is coaxially connected to the conveying roller 110, and the driving source may be a servo motor or the like capable of providing power to drive the driven shaft 310 to rotate together with the encoder 320 about its central axis. When the encoder 320 rotates together with the driven shaft 310, the encoder 320 can generate a pulse, so that the detecting element 200 can be triggered to perform photographing detection on the glass panel 40 to be detected.

Further, the pulse generating mechanism 300 further includes a bearing seat 340, a bearing 350 is disposed in the bearing seat 340, a driving shaft 331 is disposed through the bearing 350 and the bearing seat 340, and the driving shaft 331 is connected to the bearing seat 340 through the bearing 350. Thus, by providing the bearing 350 and the bearing housing 340, the driving shaft 331 can be supported, and the friction coefficient of the driving shaft 331 in the rotation process can be reduced, so that the rotation accuracy thereof can be ensured.

However, as described in the background art, in some cases, when the defect detecting device 10 is suddenly stopped, the driving wheel suddenly stops rotating, the encoder 320 also immediately stops rotating, at which instant, the glass panel 40 does not immediately stop advancing but continues to move forward for a distance due to inertia, in which case the glass panel 40 is likely to fly forward rapidly due to inertia to damage the product, and no pulse is generated due to the stop of the encoder 320, so that the camera cannot continue photographing the glass panel 40, thus causing missed inspection of a partial area of the glass panel 40.

To solve this problem, the inventor of the present application has studied intensively that the driven shaft 310 is detachably connected to the driving source by a unidirectional transmission assembly 330, the unidirectional transmission assembly 330 is configured to enable the driven shaft 310 to rotate around its central axis when the driving source is started, and to automatically disconnect the driven shaft 310 from the driving source when the panel defect device is suddenly stopped (i.e. the moment when the driving source suddenly stops driving), so that the driven shaft 310 stops rotating for several turns relative to the driving source under the action of inertia, and thus the encoder 320 can also continue rotating for several turns, so that the pulse triggering detection element 200 can be continuously generated before the glass panel 40 stops advancing to detect the glass panel 40, avoiding the occurrence of missed detection, and since the driven shaft 310 does not suddenly stop rotating, the glass panel 40 does not suddenly fly forward, and avoiding the occurrence of damage caused by rapid flying of the glass panel 40.

Specifically, with continued reference to fig. 3 and 4, in one embodiment, the unidirectional transmission assembly 330 includes a driving shaft 331, a first transmission wheel (not shown) and a second transmission wheel 332, wherein the driving shaft 331 is coaxially disposed with the driven shaft 310 and integrally connected with the driven shaft 310, the first transmission wheel and the second transmission wheel 332 are disposed at intervals and are in transmission connection with each other, and the first transmission wheel is in transmission connection with the driving source, and the second transmission wheel 332 is coaxially connected with the driving shaft 331.

In one embodiment, the first and second driving wheels 332 are magnetic wheels, and a plurality of magnetic blocks are respectively arranged inside the magnetic wheels and connected together through a wheel shaft. And the wheel axle is also fixed with a plurality of coils which are connected together to form a circuit. When the magnetic wheel rotates, the magnetic blocks serving as the permanent magnets and the coils serving as the electromagnets generate electric energy through interaction, namely the distance between the magnetic blocks and the coils is changed continuously, so that the current in the coils is changed continuously, and the changed current generates a magnetic field.

Preferably, the magnetic poles of the first driving wheel are opposite to the magnetic poles of the second driving wheel 332, so that the repulsive force can be converted into the driving force by utilizing the principle of opposite repulsion of the magnetic poles, and thus under normal conditions, when the first driving wheel rotates around the central axis of the first driving wheel under the driving of the driving source, magnetic force can be generated between the first driving wheel and the second driving wheel 332, the driving shaft 331, the driven shaft 310 and the encoder 320 can be synchronously rotated around the central axis of the second driving wheel together through the magnetic force. When the driving source stops driving suddenly, the magnetic force generated between the first driving wheel and the second driving wheel 332 disappears, but the second driving wheel 332 does not stop rotating immediately due to the action of inertia, but continues to rotate for a plurality of circles with the driving shaft 331, the driven shaft 310 and the encoder 320, so that the technical effect that when the driving source stops driving, the encoder 320 still can generate pulses to trigger the detecting element 200 to continuously detect the moving glass panel 40 can be achieved.

More preferably, after the first driving wheel stops rotating, in order to prevent the second driving wheel 332, the driving shaft 331, the driven shaft 310 and the encoder 320 from rotating in a rotation direction opposite to the original rotation direction when continuing to rotate for a plurality of circles, the unidirectional transmission assembly 330 further comprises a ratchet 333, a pawl 334 and a fixing seat (not shown in the figure), wherein the ratchet 333 is coaxially sleeved on the driving shaft 331, a plurality of ratchets sequentially arranged along the circumferential direction of the ratchet 333, the ratchets are unidirectional teeth, tooth grooves are formed on every two adjacent ratchets, one end of the pawl 334 is elastically clamped in the tooth grooves, and the other end is fixedly connected with the fixing seat.

In this way, the ratchet teeth of the ratchet 333 are unidirectional teeth, so that the ratchet can cross the ratchet teeth and enter the next tooth slot along the rotation direction but not the last tooth slot when the ratchet 333 rotates, so that the ratchet 333 can only rotate unidirectionally but not bidirectionally, the driven wheel 360 cannot rotate reversely, and the situation that the glass panel 40 moves reversely is avoided.

Further, the pulse generating mechanism 300 further includes a driven wheel 360, the driven wheel 360 is coaxially sleeved on the driven shaft 310, and the conveying roller 110 may be sleeved with a conveying wheel with the same diameter as the driven wheel 360, and the conveying wheel and the driven wheel 360 are arranged at intervals along the axial direction of the conveying roller 110. It will be appreciated that the driven wheel 360 may be fixedly connected to the ratchet 333, such that when the driven shaft 310 rotates about its central axis, the driven wheel 360 rotates together, thereby rotating synchronously with the conveying wheel, so that the glass panel 40 may be placed on the conveying wheel and the driven wheel 360 to be conveyed in the conveying direction.

In another embodiment, as shown in connection with fig. 3 and 5, the structure of the pulse generating mechanism 300 is slightly different from that of the pulse generating mechanism 300 of the previous embodiment. Specifically, in this embodiment, the unidirectional transmission assembly 330 of the pulse generating mechanism 300 is not provided with the first transmission wheel and the second transmission wheel 332 with magnetism, but the driving source is always connected with the driving wheel, but the driving shaft 331 is not integrally connected with the driven shaft 310, but two shafts independent of each other, and the driving shaft 331 and the driven shaft 310 are mutually connected through the ratchet 333 and the pawl 334, similarly to the previous embodiment, the ratchet 333 is coaxially sleeved on the driving shaft 331, the ratchet teeth are arranged on the outer peripheral surface of the ratchet 333, the driven shaft 310 is coaxially sleeved with the driven wheel 360, one end of the pawl 334 is connected with the driven wheel 360, and the opposite end of the pawl 334 is elastically clamped in a tooth slot formed by two adjacent ratchet teeth and can rotate around one end connected with the driven wheel 360 after being separated from the tooth slot.

In order to allow a sufficient space for one end of the pawl 334 to be coupled with the driven wheel 360, it is preferable that the wheel diameter of the driven wheel 360 is larger than that of the ratchet 333, and one end of the pawl 334 remote from the ratchet 333 is coupled to a side of the driven wheel 360 adjacent to the ratchet 333 in its own axial direction.

Thus, under normal conditions, the driving source drives the driving shaft 331 to rotate around its central axis, at this time, one end of the pawl 334 is always clamped in one tooth slot, the pawl 334 and the driven wheel 360 also rotate around the central axis of the ratchet 333 (i.e. the central axis of the driven wheel 360), at this time, the driven shaft 310 is in transmission connection with the driving source. When the driving source suddenly stops driving, the driving shaft 331 also stops rotating at the same time, and at the same time, the driven shaft 310 is automatically separated from the driving source without manual operation. Under the inertial action, the pawl 334 is connected to one end of the driven wheel 360 and rotates around the central axis of the driven wheel 360 along with the driven wheel 360, and one end of the pawl 334, which is clamped with the tooth slot, can span the ratchet, so that the driven shaft 310 and the driven wheel 360 can rotate for a plurality of circles along with the driving shaft 331 and then stop.

It can be seen that the pulse generating mechanism 300 of this embodiment can also achieve the same technical effects as the pulse generating mechanism 300 of the previous embodiment. That is, not only can the pulse be continuously generated before the glass panel 40 stops advancing to trigger the detection element 200 to detect the glass panel 40 so as to avoid missed detection; it is possible to prevent the glass panel 40 from being damaged by the glass panel 40 flying forward due to inertia. And as such, since the ratchet teeth on the ratchet 333 are unidirectional teeth, the pulse generating mechanism 300 of this embodiment is also capable of avoiding rotation of the driven shaft 310 in a direction opposite to the original rotation direction when rotating alone.

It should be noted that, the structure of the present embodiment may be modified in other manners, that is, the ratchet 333 is annular, the ratchet is disposed on the inner peripheral surface of the ratchet 333, the driven wheel 360 is a pawl disc with a pawl 334 disposed on the outer peripheral surface, the pawl 334 on the outer peripheral surface of the driven wheel 360 is matched with the ratchet on the inner peripheral surface of the ratchet 333, and the driven shaft 310 can be also connected with the driving source in a transmission manner when the driving source is started; when the driving source suddenly stops driving, the driven shaft 310 and the driving source are not connected by manual operation and can rotate independently relative to the driving shaft 331, and the technical effect is not particularly limited, but the rest of the structure of the pulse generating mechanism 300 in the modified embodiment is identical to the rest of the structure of the pulse generating mechanism 300 in the previous embodiment, and will not be described in detail herein.

In addition, the unidirectional transmission assembly in the above embodiment may be a mechanism capable of realizing unidirectional transmission, and the unidirectional bearing transmission assembly and the like are not particularly limited herein, besides the structure of matching the ratchet and the pawl.

Finally, it should be noted that, in order to simplify the description, all possible combinations of the features of the above embodiments may be arbitrarily combined, however, as long as there is no contradiction between the combinations of the features, the description should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A pulse generating mechanism, comprising:

a driving source;

2. The pulse generating mechanism of claim 1, wherein the unidirectional transmission assembly comprises a drive shaft coaxially disposed with the driven shaft, one end of the drive shaft being drivingly connected to the drive source and the other end being connected to the driven shaft.

3. The pulse generating mechanism according to claim 2, wherein the unidirectional transmission assembly further comprises a ratchet wheel and a pawl, the ratchet wheel is coaxially sleeved on the driving shaft, the ratchet wheel is provided with a plurality of ratchet teeth which are sequentially arranged along the circumferential direction of the ratchet wheel, each two adjacent ratchet teeth are formed with tooth grooves, and one end of the pawl is elastically clamped in the tooth grooves.

4. The pulse generating mechanism according to claim 3, wherein the driving shaft is integrally connected with the driven shaft, the unidirectional transmission assembly further comprises a first transmission wheel and a second transmission wheel which are respectively provided with magnetism, the first transmission wheel and the second transmission wheel are arranged at intervals, the first transmission wheel is in transmission connection with the driving source, and the second transmission wheel is coaxially connected with the driving shaft;

5. The pulse generating mechanism of claim 4, further comprising a mounting base, wherein an end of the pawl remote from the ratchet is fixedly coupled to the mounting base.

6. The pulse generating mechanism of claim 4, further comprising a driven wheel coaxially sleeved on the driven shaft.

7. The pulse generating mechanism according to claim 3, further comprising a driven wheel coaxially sleeved on the driven wheel, wherein one end of the pawl is connected to the driven wheel, and the opposite end of the pawl is clamped in tooth grooves formed by two adjacent ratchets and can rotate around one end connected with the driven wheel after being separated from the tooth grooves;

8. The pulse generating mechanism according to claim 7, wherein a wheel diameter of the driven wheel is larger than a wheel diameter of the ratchet wheel, and an end of the pawl away from the ratchet wheel is connected to a side of the driven wheel that is closer to the ratchet wheel in the self-axial direction.

9. The pulse generating mechanism of claim 2, further comprising a bearing housing and a bearing, wherein the bearing is disposed within the bearing housing, wherein the drive shaft is disposed through the bearing and the bearing housing, and wherein the drive shaft is coupled to the bearing housing via the bearing.

10. A defect inspection apparatus comprising a conveyor line arranged in a conveying direction, at least one inspection element and a pulse generating mechanism according to any one of claims 1 to 9, said conveyor line having at least one inspection station, said inspection elements being arranged on respective ones of said inspection stations, said pulse generating mechanism being arranged with said conveyor line at the location of each of said inspection stations, an encoder of said pulse generating mechanism being capable of triggering said inspection elements to inspect a panel to be inspected when a pulse is generated.