Pressing mechanism and optical detection device

Abstract

The utility model belongs to optical detection technical field especially relates to a kind of pressing mechanism and optical detection equipment.Pressing mechanism includes fixed base, first driving part, pressing plate and conveyer belt, conveyer belt is installed on fixed base, and the output of first driving part is connected with conveyer belt;Vacuum cavity is opened in fixed base, and multiple adsorption holes are provided on conveyer belt;Pressing plate has pressing state and non-pressing state, when pressing plate is in pressing state, vacuum cavity is communicated with multiple adsorption holes, to carry out adsorption to the material plate on conveyer belt, and pressing plate can press the material plate;When pressing plate is in non-pressing state, vacuum cavity is disconnected with adsorption hole, and pressing plate is separated from material plate, and first driving part can drive conveyer belt to move, to feed material plate.In the utility model, material plate is adsorbed on conveyer belt, and pressing plate exerts pressure on material plate, under the double action of adsorption of vacuum cavity and pressing of pressing plate, the flatness of material plate is ensured, and the situation of local warping of material plate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to optical detection technical field, especially, relate to a kind of compression mechanism and optical detection equipment. BACKGROUND

[0002] Optical detection equipment is based on optical principle, and the image of PCB is collected by camera, and the detection equipment of product quality is checked and analyzed after image processing.

[0003] When detecting PCB, due to the material or processing of PCB itself, if the local compression of PCB is not flat or local warping, the imaging quality will be affected, thereby affecting the detection accuracy of optical detection equipment. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problems that the local compression of existing PCB is not flat or local warping, which affects the imaging quality, and provides a compression mechanism and optical detection equipment.

[0005] To solve the above technical problems, on the one hand, the utility model embodiment provides a compression mechanism, which comprises a fixed seat, a first driving part, a pressing plate and a conveying belt, the conveying belt is installed on the fixed seat, the output end of the first driving part is connected with the conveying belt;

[0006] A vacuum cavity is formed in the fixed seat, and a plurality of adsorption holes are arranged on the conveying belt.

[0007] The pressing plate has a compression state and a non-compression state, when the pressing plate is in the compression state, the vacuum cavity is communicated with the plurality of adsorption holes to adsorb the material plate on the conveying belt, and the pressing plate can compress the material plate on the conveying belt.

[0008] When the pressing plate is in the non-compression state, the vacuum cavity is disconnected with the adsorption hole, the pressing plate is separated from the material plate, and the first driving part can drive the conveying belt to move, so that the conveying belt can convey the material plate in the first direction.

[0009] Optionally, the compression mechanism further comprises a switching assembly, the switching assembly is used to drive the pressing plate to reciprocate along the second direction, so that the pressing plate switches between the compression state and the non-compression state.

[0010] Wherein, the first direction intersects with the second direction.

[0011] Optionally, the switching assembly comprises a plurality of elastic members, and the elastic members are arranged on the side of the pressing plate facing the fixed seat.

[0012] Optionally, the switching assembly further comprises a first guide shaft, one end of the first guide shaft is mounted on the fixed seat, the other end of the first guide shaft is arranged through the pressing plate, and the first guide shaft is used for guiding the pressing plate when the pressing plate is switched between the pressing state and the non-pressing state.

[0013] Optionally, the elastic member is a spring, the spring is sleeved outside the first guide shaft and located between the pressing plate and the fixed seat.

[0014] Optionally, the switching assembly comprises a flattening assembly, the flattening assembly is adapted to be connected to a detection mechanism of an optical detection device, and the flattening assembly is capable of moving in the second direction towards the fixed seat to drive the pressing plate to press on the material plate, so that the pressing plate is switched from the non-pressing state to the pressing state.

[0015] Optionally, the flattening assembly comprises a pressing wheel connecting member and a plurality of pressing wheels, the pressing wheel connecting member is adapted to be mounted on the detection mechanism, and the plurality of pressing wheels are arranged at intervals on the pressing wheel connecting member and capable of contacting the pressing plate.

[0016] Optionally, the flattening assembly further comprises a second guide shaft and a guide sleeve, the guide sleeve is mounted on the pressing wheel connecting member, the second guide shaft extends in the second direction, one end of the second guide shaft is connected to the pressing wheel, and the other end of the second guide shaft is arranged through the guide sleeve.

[0017] Optionally, the pressing mechanism further comprises a second driving member and a plate entering sensor, the plate entering sensor is connected to the output end of the second driving member, and the second driving member is capable of driving the plate entering sensor to move between a first position and a second position.

[0018] When the plate entering sensor is at the first position, the plate entering sensor is used for detecting the position of the material plate on the conveying belt when the material plate enters the conveying belt, and the second driving member is capable of driving the plate entering sensor to move from the first position to the second position to avoid the detection mechanism of the optical detection device.

[0019] Optionally, the pressing mechanism further comprises a sensor support, and the sensor support is connected to the output end of the second driving member.

[0020] A plurality of plate entering sensors are arranged at intervals on the sensor support in the first direction.

[0021] Optionally, the pressing mechanism further comprises a plate-out sensor mounted on the fixed base, the plate-out sensor being configured to detect the position of the material plate when the material plate leaves the conveying belt.

[0022] Optionally, the first driving member comprises a driving motor, a driving roller, a driven roller, a plurality of roller bases and a plurality of tension rollers, the driving roller and the driven roller being mounted on the fixed base, the driving roller and the driven roller being oppositely arranged along the first direction, the conveying belt being wound around the driving roller and the driven roller, the output end of the driving motor being connected with the driving roller.

[0023] The two ends of the tension roller are connected with the roller base, and a plurality of the tension rollers are arranged at intervals along the first direction, and the plurality of the tension rollers are configured to tension the conveying belt.

[0024] Optionally, the pressing mechanism further comprises a first roller set and a second roller set, the first roller set and the second roller set being oppositely arranged on the fixed base along the first direction, the first roller set being configured to support and guide the material plate when the material plate enters the conveying belt, and the second roller set being configured to support and guide the material plate when the material plate leaves the conveying belt.

[0025] In another aspect, the utility model provides a kind of optical detection equipment, including machine table, detection mechanism and as described above pressing mechanism, the detection mechanism and the pressing mechanism are installed on the machine table, and the detection mechanism is configured to detect the material plate on the conveying belt.

[0026] The pressing mechanism provided by the embodiment of the utility model, when the pressing plate is in the pressing state, the vacuum cavity is communicated with the adsorption hole, the material plate is firstly adsorbed on the conveying belt by the negative pressure generated by the vacuum cavity through the adsorption hole, so that the material plate is preliminarily stabilized, further, the pressing plate applies pressure on the material plate, and the material plate is tightly pressed on the conveying belt, under the double effects of the adsorption of the vacuum cavity and the pressing of the pressing plate, the flatness of the material plate is ensured, and the unevenness and local warping of the material plate are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the schematic diagram of the pressing mechanism provided by the embodiment of the utility model;

[0028] Figure 2 is the exploded view of the pressing mechanism provided by the embodiment of the utility model;

[0029] Figure 3 is the schematic diagram of the pressing mechanism and the detection mechanism provided by the embodiment of the utility model;

[0030] Figure 4 is a schematic view of the flattening assembly provided by an embodiment of the present application.

[0031] The reference signs in the description are as follows:

[0032] 10, pressing mechanism;

[0033] 1, fixed seat; 11, first suction accessory; 111, vacuum cavity; 12, second suction accessory; 121, connecting hole;

[0034] 2, first driving member; 21, driving motor; 22, driving roller shaft; 23, driven roller shaft; 24, tensioning roller shaft; 25, roller shaft seat;

[0035] 3, pressing plate;

[0036] 4, conveying belt; 41, suction hole;

[0037] 51, elastic member; 52, flattening assembly; 521, pressing wheel connecting piece; 522, pressing wheel; 523, second guide shaft; 524, guide sleeve; 525, connecting rod;

[0038] 6, second driving member; 61, in-plate inductor; 62, inductor support;

[0039] 7, out-plate inductor;

[0040] 8, first roller set; 81, first connecting shaft; 82, first roller;

[0041] 9, second roller set; 91, second connecting shaft; 92, second roller;

[0042] 20, detection mechanism;

[0043] a, first direction; b, second direction. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clear and obvious, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0045] As shown in Figures 1 to 4 the present application provides a pressing mechanism 10, which comprises a fixed seat 1, a first driving member 2, a pressing plate 3 and a conveying belt 4. The conveying belt 4 is installed on the fixed seat 1, the output end of the first driving member 2 is connected with the conveying belt 4, and the first driving member 2 can drive the conveying belt 4 to move.

[0046] A vacuum cavity 111 is formed in the fixed seat 1, and a plurality of suction holes 41 are formed in the conveying belt 4.

[0047] The pressing plate 3 has a pressing state and a non-pressing state. When the pressing plate 3 is in the pressing state, the vacuum cavity 111 is in communication with the plurality of suction holes 41, so that the material plate on the conveying belt 4 is adsorbed, and the material plate is adsorbed on the conveying belt 4 under the adsorption of the vacuum cavity 111. The pressing plate 3 can press the material plate on the conveying belt 4, and the pressing function of the material plate can be realized through the close contact between the pressing plate 3 and the material plate, so as to reduce the unevenness and local warping of the material plate as much as possible.

[0048] When the pressing plate 3 is in the non-pressing state, the vacuum cavity 111 is disconnected from the suction holes 41, the adsorption of the vacuum cavity 111 on the material plate is released, and the pressing plate 3 is separated from the material plate, so as to prepare for the subsequent conveying of the material plate by the conveying belt 4 driven by the first driving member 2. The first driving member 2 can drive the conveying belt 4 to move, so that the conveying belt 4 can convey the material plate in the first direction a.

[0049] In this embodiment, after the material plate enters the conveying belt 4, the adsorption is started, and the vacuum cavity 111 is formed by the external vacuum equipment to form a negative pressure, so as to generate a suction force. When the pressing plate 3 is in the pressing state, the vacuum cavity 111 is in communication with the suction holes 41, and the material plate is first adsorbed on the conveying belt 4 by the negative pressure generated by the vacuum cavity 111 through the suction holes 41, so that the material plate is preliminarily stabilized. Further, the pressing plate 3 applies pressure on the material plate to tightly press the material plate on the conveying belt 4. Under the double actions of the adsorption of the vacuum cavity and the pressing of the pressing plate 3, the flatness of the material plate is ensured.

[0050] After the detection of the material plate on the conveying belt 4 is completed, the pressing plate 3 is switched to the non-pressing state, the connection between the vacuum cavity 111 and the suction holes 41 is disconnected, the adsorption action disappears, and the material plate is no longer adsorbed. When the pressing plate 3 is separated from the material plate, the pressing plate 3 no longer hinders the movement of the conveying belt 4, so that the conveying belt 4 can drive the material plate to move under the driving of the first driving member 2, the material plate after detection is sent out, and the optical detection operation of the material plate is completed.

[0051] Through the switching of the pressing state and the non-pressing state of the pressing plate 3, the stability of the material plate during optical detection and the timely sending of the material plate after detection are ensured.

[0052] In an embodiment, the pressing plate 3 is made of a material with good light transmittance, such as optical glass. In this way, when the detection mechanism 20 of the optical detection equipment detects, the light beam of the light source can penetrate the pressing plate 3 and irradiate on the material plate, so that the material plate can be clearly imaged, and the imaging quality is ensured.

[0053] In an embodiment, as shown in FIG. 6, the pressing plate 3 is provided with a plurality of through holes 31, and the through holes 31 are in communication with the suction holes 41 of the conveying belt 4. Figure 2As shown, the conveying belt 4 is arranged around the fixed base 1 in a closed structure, and the part of the conveying belt 4 above the fixed base 1 is in contact with the material plate. The size, spacing and distribution of the plurality of suction holes 41 on the conveying belt 4 are determined according to the size, shape and required suction force of the material plate. Preferably, the suction holes 41 are uniformly distributed on the conveying belt 4, and when any part of the conveying belt 4 moves above the fixed base 1 and is in contact with the material plate, a negative pressure suction area is formed below the entire material plate when the vacuum cavity 111 is in communication with the suction holes 41, ensuring that the material plate is stably and firmly adsorbed on the conveying belt 4, and has a certain flattening effect on the material plate. On this basis, the material plate is compressed by the pressing plate 3 to ensure the flatness of the material plate, which can avoid the local edge lifting of the material plate during optical detection of the material plate.

[0054] As an example, as shown in Figure 2 The fixed base 1 includes a first suction member 11 and a second suction member 12, the vacuum cavity 111 is arranged on the first suction member 11 and recessed away from the second suction member 12, the second suction member 12 is provided with a plurality of connecting holes 121, and the second suction member 12 is connected to the first suction member 11 to close the vacuum cavity 111. The opening of the vacuum cavity 111 faces the second suction member 12, so that after the second suction member 12 is covered on the first suction member 11, the opening of the vacuum cavity 111 can be closed to form a closed cavity. The vacuum cavity 111 can be in communication with the suction holes 41 through the connecting holes 121, and the suction force can be transmitted from the suction cavity to the suction holes 41 through the connecting holes 121, and then act on the material plate placed on the conveying belt 4, ensuring that the material plate can be firmly adsorbed.

[0055] In an embodiment, as shown in Figures 1 to 4 The pressing mechanism 10 further includes a switching assembly for driving the pressing plate 3 to reciprocate along a second direction b to switch the pressing plate 3 between the pressing state and the non-pressing state; wherein the first direction a intersects the second direction b. The switching assembly can accurately switch the pressing plate 3 between the pressing state and the non-pressing state, so that the device operator or the control system can flexibly control the state switching of the pressing plate 3 according to the actual production needs.

[0056] When the pressing plate 3 needs to be switched to the pressing state, the switching assembly drives the pressing plate 3 to move along the first direction a towards the direction of approaching the conveying belt 4, so that the pressing plate 3 is in contact with the material plate and exerts appropriate pressure, and meanwhile the vacuum cavity 111 is in communication with the suction hole 41, thereby realizing the double fixation of the material plate through suction and pressing. When the pressing plate 3 is switched to the non-pressing state, the switching assembly drives the pressing plate 3 to move in the opposite direction, i.e., the switching assembly drives the pressing plate 3 to move along the first direction a towards the direction of moving away from the conveying belt 4, so that the pressing plate 3 is separated from the conveying belt 4, and the connection between the vacuum cavity 111 and the suction hole 41 is disconnected, thereby enabling the conveying belt 4 to freely convey the material plate under the drive of the first driving member 2.

[0057] In an example, the first direction a is perpendicular to the second direction b, the first direction a is a horizontal direction, and the second direction b is a vertical direction. The switching assembly can drive the pressing plate 3 to reciprocate in the vertical direction. The conveying belt 4 is located below the pressing plate 3. When the switching assembly drives the pressing plate 3 to move downward, the pressing plate 3 can press on the material plate to perform a flattening operation on the material plate. When the switching assembly drives the pressing plate 3 to move upward, the material plate is separated from the material plate, thereby facilitating the movement of the conveying belt 4 under the drive of the first driving member 2 to convey the material plate out through the conveying belt 4.

[0058] In an embodiment, as shown in Figure 1 , Figure 2 The switching assembly includes a plurality of elastic members 51, which are arranged on the side of the pressing plate 3 facing the fixed base 1. The "plurality" refers to more than or equal to two, and the meaning of "plurality" is the same in each embodiment, which will not be described hereinafter.

[0059] When the pressing plate 3 is in the pressing state, the elastic members 51 are extruded by the pressing plate 3. The elastic members 51 have a tendency to drive the pressing plate 3 to move along the second direction b away from the fixed base 1, so as to switch the pressing plate 3 from the pressing state to the non-pressing state when the pressing state of the pressing plate 3 is released. When the pressing plate 3 is in the pressing state, the elastic members 51 are deformed by being extruded by the pressing plate 3, and store elastic potential energy. When it is necessary to release the pressing state of the pressing plate 3, the elastic members 51 will have a tendency to drive the pressing plate 3 to move along the second direction b away from the fixed base 1 by virtue of the stored elastic potential energy, thereby assisting the pressing plate 3 to smoothly switch from the pressing state to the non-pressing state, so that the pressing plate 3 is separated from the material plate. The automatic return mechanism of the elastic members 51 makes the switching process of the pressing plate 3 more rapid and stable.

[0060] In addition, during the process of switching the pressing plate 3 from the non-pressing state to the pressing state, the elastic members 51 can play a buffering role, so that when the pressing plate 3 is pressed downward to press the material plate, the pressing plate 3 can be gently and stably attached to the material plate, thereby reducing the damage to the material plate caused by the rapid and rigid downward pressing of the pressing plate 3.

[0061] In one embodiment, the elastic element 51 can be a spring, a rubber elastomer, or the like. Preferably, in this embodiment, the elastic element 51 is a rectangular spring.

[0062] In one embodiment, four or six elastic elements 51 are provided. When four elastic elements 51 are provided, the four elastic elements 51 are respectively arranged at the four corners of the material plate. When six elastic elements 51 are provided, in addition to the four corners of the material plate, the remaining elastic elements 51 are arranged along the outer edge of the material plate.

[0063] In one embodiment, the switching assembly further includes a first guide shaft (not shown in the figure). One end of the first guide shaft is mounted on the fixed base 1, and the other end of the first guide shaft passes through the pressure plate 3. The first guide shaft is used to guide the pressure plate 3 when switching between a pressing state and a non-pressing state. Through the cooperation between the first guide shaft and the pressure plate 3, the movement of the pressure plate 3 can be guided when it moves along the second direction b. When switching to the non-pressing state, the pressure plate 3 can accurately return to the position corresponding to the non-pressing state. When switching to the pressing state, the pressure plate 3 can accurately press onto the material plate each time, ensuring the flattening effect of the pressure plate 3 on the material plate.

[0064] The first guide shaft has a cylindrical structure, which can provide precise guidance for the pressure plate 3. The pressure plate 3 is provided with a hole corresponding to the first guide shaft, and the first guide shaft passes through the hole, so that the pressure plate 3 can move along the first guide shaft to realize the guiding function.

[0065] In one embodiment, the elastic element 51 is a spring, which is sleeved outside the first guide shaft and located between the pressure plate 3 and the fixed seat 1. Thus, when the pressure plate 3 switches to the pressing state, it can compress the elastic element 51, causing it to deform and generate elastic force. The force exerted by the elastic element 51 on the pressure plate 3 is upward. After the pressing state of the pressure plate 3 is released, under the action of the elastic force, the pressure plate 3 moves upward, switching to the non-pressing state.

[0066] In one embodiment, such as Figure 3 , Figure 4 As shown, the switching component includes a flattening component 52, which is adapted to be connected to the detection mechanism 20 of the optical inspection equipment. The flattening component 52 can move along the second direction b toward the direction close to the fixed base 1 to drive the pressure plate 3 to press on the material plate, so that the pressure plate 3 switches from a non-pressed state to a pressed state.

[0067] In the initial state (when the pressure plate 3 is not pressed), the elastic element 51 is in a natural or pre-compressed state, which will generate an upward supporting force on the pressure plate 3. When the flattening component 52 moves along the second direction b toward the direction close to the fixed seat 1, it can push the pressure plate 3 to move downward and overcome the effect of the elastic element 51 until the pressure plate 3 presses on the material plate.

[0068] In order to obtain a clear and accurate detection image, the detection distance between the detection mechanism 20 of the optical detection device and the material plate needs to meet the requirements. The installation position of the flattening assembly 52 on the detection mechanism 20 of the optical detection device is determined according to the detection distance of the detection mechanism 20. When the detection mechanism 20 moves downward to approach the material plate during detection of the material plate, the flattening mechanism moves synchronously, and the pressing plate 3 also moves downward and gradually enters the pressing state. When the flattening mechanism pushes the pressing plate 3 to the pressing state, the detection mechanism 20 can also reach the detection position to perform optical detection on the material plate below the pressing plate 3.

[0069] As an example, the switching assembly includes a flattening assembly 52 located above the pressing plate 3 and a plurality of elastic members 51 located between the pressing plate 3 and the fixed seat 1. The flattening assembly 52 can push the pressing plate 3 to move downward, so that the pressing plate 3 switches from the non-pressing state to the pressing state. The plurality of elastic members 51 can push the pressing plate 3 to move upward, so that the pressing plate 3 switches from the pressing state to the non-pressing state.

[0070] In an embodiment, as shown in Figure 4 The flattening assembly 52 includes a pressing wheel connecting member 521 adapted to be installed on the detection mechanism 20 and a plurality of pressing wheels 522 spaced apart on the pressing wheel connecting member 521, which can contact the pressing plate 3. When the flattening assembly 52 pushes the pressing plate 3 to switch to the pressing state, the plurality of pressing wheels 522 contact the material plate, so that under the action of the pressing wheels 522, the pressing plate 3 can be completely attached to the material plate, ensuring that the material plate is flat and has no edge lifting. At the same time, the pressing wheels 522 can also reduce the friction on the pressing plate 3, preventing the pressing plate 3 from being damaged.

[0071] In an embodiment, as shown in Figure 4 The flattening assembly 52 further includes a second guide shaft 523 and a guide sleeve 524. The guide sleeve 524 is installed on the pressing wheel connecting member 521, and the second guide shaft 523 extends in the second direction b. One end of the second guide shaft 523 is connected to the pressing wheel 522, and the other end of the second guide shaft 523 passes through the guide sleeve 524. The guide sleeve 524 can guide the second guide shaft 523, so that the pressing wheel 522 can move up and down in the second direction b. When the pressing wheel 522 contacts the surface of the pressing plate 3, the movement of the second guide shaft 523 in the guide sleeve 524 can avoid excessive force on the surface of the pressing plate 3, which can damage the pressing plate 3 and the material plate. The pressing plate 3 and the pressing wheel 522 contact each other to play a buffering role.

[0072] The second guide shaft 523 is provided with a plurality of guide sleeves 524, and each second guide shaft 523 is arranged in a corresponding guide sleeve 524, and each pressing wheel 522 is arranged between two second guide shafts 523, so that the pressing wheel 522 can be balanced on both sides and better buffering effect can be achieved.

[0073] Further, as shown in Figure 4 the flattening assembly 52 further comprises a connecting rod 525, and the two second guide shafts 523 of each pressing wheel 522 are connected by the connecting rod 525, one end of one of the second guide shafts 523 is connected to the pressing wheel 522, and the other end is connected to one end of the connecting rod 525 after passing through the corresponding guide sleeve 524, and one end of the other second guide shaft 523 is connected to the pressing wheel 522, and the other end is connected to the other end of the connecting rod 525 after passing through the corresponding guide sleeve 524, and the connecting rod 525 is located on the side of the pressing wheel connecting piece 521 away from the pressing wheel 522, so that the second guide shaft 523 will not be separated from the guide sleeve 524 when moving up and down.

[0074] In an embodiment, as shown in Figure 1 the pressing mechanism 10 further comprises a second driving member 6 and a plate entering sensor 61, and the plate entering sensor 61 is connected to the output end of the second driving member 6, and the second driving member 6 can drive the plate entering sensor 61 to move between the first position and the second position.

[0075] When the plate entering sensor 61 is in the first position, the plate entering sensor 61 is used to detect the position of the material plate on the conveying belt 4 when the material plate enters the conveying belt 4, and the second driving member 6 can drive the plate entering sensor 61 to move from the first position to the second position to avoid the detection mechanism 20 of the optical detection device. The second driving member 6 drives the plate entering sensor 61 to move between the first position and the second position, so that the position information of the material plate on the conveying belt 4 can be accurately detected, so as to accurately connect with the subsequent processing and detection processes, and the detection mechanism 20 of the optical detection device can be avoided in time after the material plate is in place, so that the operation of the detection mechanism 20 is effectively guaranteed.

[0076] Specifically, when the material plate enters the conveying belt 4 or just starts to enter, the pressing plate 3 is in a non-pressing state, and at this time the first driving member 2 drives the conveying belt 4 to move to drive the material plate to move in the first direction a, so that the material plate can be completely moved onto the conveying belt 4. When the plate entering sensor 61 is in the first position, the position of the material plate on the conveying belt 4 can be accurately detected, so as to determine whether the material plate is moved in place on the conveying belt 4. After the plate entering sensor 61 sends a signal that the material plate is in place, the first driving member 2 stops driving the conveying belt 4, and the vacuum cavity 111 adsorbs the material plate.

[0077] When the detection mechanism 20 of the optical detection device needs to detect the material plate, the detection mechanism 20 and the flattening mechanism move downward along the second direction b, at this time, the second driving member 6 drives the plate entering sensor 61 to move from the first position to the second position, so that the plate entering sensor 61 is away from the movement path of the detection mechanism 20, avoiding collision or interference between the two, so that the flattening mechanism can push the pressing plate 3 to switch to the pressing state, and at the same time the detection mechanism 20 detects the material plate. After the detection mechanism 20 completes the detection and moves away, the second driving member 6 can also move the plate entering sensor 61 back to the first position according to the instruction, and continue to detect the position of the material plate entering the conveying belt 4 subsequently, and the whole process is completed by the cooperation between the components.

[0078] In an embodiment, the second driving member 6 can be selected from common linear driving devices such as air cylinders, hydraulic cylinders, linear motors, etc. In the embodiment, the second driving member 6 is an air cylinder.

[0079] In an embodiment, as shown in Figure 1 , the pressing mechanism 10 further comprises a sensor bracket 62, and the plate entering sensor 61 is provided in plurality, the sensor bracket 62 is connected with the output end of the second driving member 6, and the plurality of plate entering sensors 61 are arranged on the sensor bracket 62 along the first direction a, and the second driving member 6 can drive the plurality of plate entering sensors 61 to move through the sensor bracket 62. In the embodiment, by arranging the plurality of plate entering sensors 61 distributed along the first direction a, compared with a single plate entering sensor 61, the position of the material plate on the conveying belt 4 can be detected from multiple different positions, which greatly improves the detection accuracy and reduces the situation that the single plate entering sensor appears detection error when the material plate deviates on the conveying belt 4, resulting in incorrect judgment of the overall position of the material plate.

[0080] In an embodiment, as shown in Figure 1 , Figure 2 , the pressing mechanism 10 further comprises a plate exiting sensor 7, and the plate exiting sensor 7 is installed on the fixed seat 1. The plate exiting sensor 7 is used to detect the position of the material plate when the material plate leaves the conveying belt 4, which can accurately monitor the discharging condition of the material plate and facilitate the arrangement of the conveying of the next material plate.

[0081] As an example, the pressing mechanism 10 comprises a board-out sensor 7 and a plurality of board-in sensors 61. In the first direction a, the fixed base 1 has a first side and a second side. The material board enters the conveying belt 4 from the first side, and after detection is completed, the conveying belt 4 carries the material board away from the second side. The material board has a front end and a rear end in the first direction a. The plurality of board-in sensors 61 are arranged above the fixed base 1 and close to the second side. When the material board enters the conveying belt 4, the board-in sensors 61 indicate that the material board has been conveyed into position when the front end of the material board is sensed. The board-out sensor 7 is arranged at the second side of the fixed base 1. When the rear end of the material board is sensed by the board-out sensor 7, it indicates that the material board has substantially left the conveying belt 4. The position of the material board can be accurately controlled by the board-out sensor 7 and the plurality of board-in sensors 61.

[0082] In an embodiment, as shown in Figure 1 、 Figure 2 , the first driving member 2 comprises a driving motor 21, a driving roller shaft 22, a driven roller shaft 23, a plurality of roller shaft seats 25, and a plurality of tension roller shafts 24. The driving roller shaft 22 and the driven roller shaft 23 are installed at both ends of the fixed base 1. The driving roller shaft 22 and the driven roller shaft 23 are oppositely arranged in the first direction a. The conveying belt 4 is wound around the driving roller shaft 22 and the driven roller shaft 23. The output end of the driving motor 21 is connected to the driving roller shaft 22. The driving motor 21 can drive the driving roller shaft 22 to rotate, thereby driving the conveying belt 4 to move, and further driving the material board placed on the conveying belt 4 to move in the first direction a.

[0083] The two ends of each tension roller shaft 24 are connected to a roller shaft seat 25. The roller shaft seat 25 can support the tension roller shaft 24. The plurality of tension roller shafts 24 are arranged in the first direction a. The plurality of tension roller shafts 24 are arranged between the driving roller shaft 22 and the driven roller shaft 23. The plurality of tension roller shafts 24 are used to tension the conveying belt 4. The tension roller shafts 24 can apply a certain tension to the conveying belt 4, thereby increasing the friction between the conveying belt 4 and the driving roller shaft 22, and avoiding slippage of the conveying belt 4 during conveying.

[0084] In an embodiment, as shown in Figure 1 、 Figure 2 , the pressing mechanism 10 further comprises a first roller set 8 and a second roller set 9. The first roller set 8 and the second roller set 9 are oppositely arranged on the fixed base 1 in the first direction a. The first roller set 8 is installed on the side of the fixed base 1 close to the driven roller shaft 23. The second roller set 9 is installed on the side of the fixed base 1 close to the driving roller shaft 22. The driving roller shaft 22 and the driven roller shaft 23 are arranged between the first roller set 8 and the second roller set 9 in the first direction a.

[0085] The first roller set 8 is used for supporting and guiding the material plate when the material plate enters the conveying belt 4, and the second roller set 9 is used for supporting and guiding the material plate when the material plate leaves the conveying belt 4. The first roller set 8 can guide the material plate to enter the conveying belt 4 stably, provide appropriate power and guidance, and ensure that the material plate can be accurately received by the conveying belt 4, so as to avoid that the material plate is jammed or deviated when the material plate enters. The material plate is smoothly transferred to the conveying belt 4. The second roller set 9 can effectively drive the material plate to leave the conveying belt 4, which helps to prevent the material plate from being adhered to the conveying belt 4 or from being not smoothly discharged when the material plate is discharged, and ensures that the material plate can accurately enter the next process.

[0086] In an embodiment, as shown in Figure 1 The first roller set 8 includes a first connecting shaft 81 and a plurality of first rollers 82, the first connecting shaft 81 is installed on the fixed seat 1, and the plurality of first rollers 82 are arranged at intervals along the axial direction of the first connecting shaft 81. When the material plate is fed to the conveying belt 4 in the previous process, the gap between the two processes can be filled by the first roller set 8, so that the material plate is smoothly transferred to the conveying belt 4.

[0087] The second roller set 9 includes a second connecting shaft 91 and a plurality of second rollers 92, the second connecting shaft 91 is installed on the fixed seat 1, and the plurality of second rollers 92 are arranged at intervals along the axial direction of the second connecting shaft 91. When the material plate leaves the conveying belt 4 to move to the next process, the gap between the two processes can be filled by the second roller set 9, so that the material plate is smoothly transferred to the next process.

[0088] Preferably, the first connecting shaft 81 and the second connecting shaft 91 are arranged in parallel.

[0089] On the other hand, as shown in Figure 2 The utility model discloses an optical detection equipment, including machine table, detection mechanism 20 and the pressing mechanism 10 of above-mentioned embodiment, detection mechanism 20 and pressing mechanism 10 are installed on machine table, and detection mechanism 20 is used for detecting the material plate on conveying belt 4.

[0090] In an embodiment, the optical detection equipment is used for detecting PCB, and the detection mechanism 20 collects the image of the PCB by using optical imaging technology, and can identify various defects such as short circuit, open circuit, broken line and poor soldering point on the PCB.

[0091] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A compression mechanism, characterized in that, The device comprises a fixed base, a first driving element, a pressing plate and a conveying belt, the conveying belt is installed on the fixed base, and the output end of the first driving element is connected with the conveying belt; A vacuum cavity is formed in the fixed base, and a plurality of suction holes are arranged on the conveying belt; The pressing plate has a pressing state and a non-pressing state, when the pressing plate is in the pressing state, the vacuum cavity is communicated with the plurality of suction holes to adsorb the material plate on the conveying belt, and the pressing plate can press the material plate on the conveying belt; When the pressing plate is in the non-pressing state, the vacuum cavity is disconnected with the suction holes, the pressing plate is separated from the material plate, and the first driving element can drive the conveying belt to move so that the conveying belt can convey the material plate in a first direction.

2. The holdback mechanism of claim 1 wherein, The pressing mechanism further comprises a switching assembly for driving the pressing plate to reciprocate along a second direction so as to switch the pressing plate between the pressing state and the non-pressing state. The first direction intersects with the second direction.

3. The holdback mechanism of claim 2 wherein, The switching assembly comprises a plurality of elastic elements arranged on the side of the pressing plate facing the fixed base.

4. The holdback mechanism of claim 3 wherein, The switching assembly further comprises a first guide shaft, one end of the first guide shaft is installed on the fixed base, and the other end of the first guide shaft penetrates the pressing plate, and the first guide shaft is used for guiding the pressing plate when the pressing plate is switched between the pressing state and the non-pressing state.

5. The holdback mechanism of claim 4 wherein, The elastic element is a spring, the spring is sleeved on the outside of the first guide shaft and located between the pressing plate and the fixed base.

6. The holdback mechanism of claim 2 wherein, The switching assembly comprises a flattening assembly, the flattening assembly is adapted to be connected to a detection mechanism of an optical detection device, the flattening assembly can move along the second direction towards the fixed base to drive the pressing plate to press on the material plate, so that the pressing plate is switched from the non-pressing state to the pressing state.

7. The holdback mechanism of claim 6 wherein, The flattening assembly comprises a pressing wheel connecting element and a plurality of pressing wheels, the pressing wheel connecting element is adapted to be installed on the detection mechanism, the plurality of pressing wheels are arranged at intervals on the pressing wheel connecting element, and the pressing wheels can contact the pressing plate.

8. The holdback mechanism of claim 7 wherein, The flattening assembly further comprises a second guide shaft and a guide sleeve, the guide sleeve is installed on the pressing wheel connecting element, the second guide shaft extends along the second direction, one end of the second guide shaft is connected with the pressing wheel, and the other end of the second guide shaft penetrates the guide sleeve.

9. A compression mechanism according to any one of claims 1-8, characterized in that The pressing mechanism further comprises a second driving element and a plate entering sensor, the plate entering sensor is connected with the output end of the second driving element, and the second driving element can drive the plate entering sensor to move between a first position and a second position. When the plate entering sensor is in the first position, the plate entering sensor is used for detecting the position of the material plate on the conveying belt when the material plate enters the conveying belt, and the second driving element can drive the plate entering sensor to move from the first position to the second position to avoid the detection mechanism of the optical detection device.

10. The holdback mechanism of claim 9 wherein, The pressing mechanism further comprises a sensor support connected with the output end of the second driving member; The plate feeding sensors are arranged in the first direction on the sensor support.

11. A compression mechanism according to any one of claims 1 to 8, wherein The pressing mechanism further comprises a plate discharging sensor installed on the fixed base, the plate discharging sensor being used to detect the position of the material plate when the material plate leaves the conveying belt.

12. The holdback mechanism of claim 1 wherein, The first driving member comprises a driving motor, a driving roller, a driven roller, a plurality of roller bases and a plurality of tension rollers, the driving roller and the driven roller being installed on the fixed base, the driving roller and the driven roller being oppositely arranged in the first direction, the conveying belt being wound around the driving roller and the driven roller, the output end of the driving motor being connected with the driving roller; The two ends of the tension roller are connected with the roller base, and a plurality of the tension rollers are arranged in the first direction, the plurality of the tension rollers being used to tension the conveying belt.

13. The holdback mechanism of claim 1 wherein, The pressing mechanism further comprises a first roller set and a second roller set, the first roller set and the second roller set being oppositely arranged on the fixed base in the first direction, the first roller set being used to support and guide the material plate when the material plate enters the conveying belt, and the second roller set being used to support and guide the material plate when the material plate leaves the conveying belt.

14. An optical detection device, characterized by The system comprises a machine table, a detection mechanism and the pressing mechanism according to any one of claims 1-13, the detection mechanism and the pressing mechanism being installed on the machine table, and the detection mechanism being used to detect the material plate on the conveying belt.

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