Circuit board transmission mechanism and circuit board liquid homogenizing treatment equipment

Abstract

The utility model relates to the technical field of circuit board equipment, and discloses a circuit board transmission mechanism and circuit board uniform liquid processing equipment, and the circuit board transmission mechanism comprises a pedestal, a material loading assembly, a first transmission assembly, a second transmission assembly and a driving assembly. The material loading assembly comprises a support and a rotating disc, and the rotating disc is rotatably arranged on the support and used for fixing a circuit board. The second transmission assembly is arranged on the support and comprises a roller, and the roller is arranged on the first transmission assembly in a rolling mode in the first direction; the driving assembly comprises a transmission assembly and a shifting piece, the transmission assembly is used for driving the shifting piece to move so as to push the support to move in the first direction, and the support moves and drives the second transmission assembly to move; when the second transmission assembly moves in the first direction, the rolling wheel rolls on the first transmission assembly along with movement of the second transmission assembly and drives the rotating disc to rotate. According to the utility model, the problem that the liquid medicine is not uniform when the board surface of the circuit board is sprayed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board equipment, in particular to a circuit board transmission mechanism and circuit board liquid homogenization processing equipment. Background Art

[0002] During the printed circuit board (PCB) processing process, the boards typically undergo a series of steps, including development, washing, etching, and drying. Existing liquid treatment equipment typically positions the boards horizontally before processing. Typically, when the boards are positioned horizontally, the process of spraying them with liquid chemical can create a pooling effect—water pooling—on the board surface, resulting in uneven treatment across the board. This is because it's difficult to position the boards perfectly horizontally during processing. Utility Model Content

[0003] The main purpose of the utility model is to provide a circuit board transmission mechanism, aiming to solve the problem of uneven spraying of the circuit board surface.

[0004] In order to achieve the above-mentioned purpose, the circuit board transmission mechanism proposed in the present invention includes: a base;

[0005] The material loading assembly includes a bracket and a turntable, wherein the turntable is rotatably mounted on the bracket and is used to fix the circuit board;

[0006] A first transmission assembly is provided on the base;

[0007] a second transmission assembly, disposed on the bracket, the second transmission assembly comprising a roller, the roller being rotatably disposed on the first transmission assembly along a first direction, the roller being located below the turntable; and

[0008] The driving assembly includes a transmission assembly and a toggle member. The transmission assembly is used to drive the toggle member to move, so as to push the bracket to move in a first direction. The bracket moves and drives the second transmission assembly to move. When the second transmission assembly moves in the first direction, the roller rolls on the first transmission assembly as the second transmission assembly moves, and drives the turntable to rotate.

[0009] In one embodiment, the shifting member includes a support frame and a shifting rod, the support frame is connected to the transmission assembly, a limiting portion is provided on the support frame, and the shifting rod is rotatably provided on the support frame, and the shifting rod has an initial state and an abutting state; in the initial state, the shifting rod is spaced apart from the limiting portion; in the abutting state, the shifting rod is limited to the limiting portion and abuts against the bracket.

[0010] In one embodiment, the shift rod has a guide portion and a push portion, and the guide portion and the push portion are arranged at the same end of the shift rod and are arranged opposite to each other. The guide portion is inclined in the direction away from the transmission component and biased toward the push portion. The bracket includes a cross bar, and the guide portion is used to guide the cross bar to abut against the push portion, and the push portion pushes the cross bar to move when driven by the transmission component.

[0011] In one embodiment, the shift lever further includes a counterweight portion, which is located at an end of the shift lever away from the guide portion and is used to restore the shift lever in the abutment state to the initial state. The shift lever further includes a hinge portion, which is located between the guide portion and the counterweight portion. The hinge portion is hinged to the support frame, and the hinge portion rotates to rotate the shift lever.

[0012] In one embodiment, the toggle member and the toggle rod are rotatably disposed in the support frame, the limiting portion is disposed in the support frame, and the limiting portion includes a first limiting member and a second limiting member, the first limiting member is located on a side of the support frame close to the guide portion, and is used to abut against the guide portion, and the second limiting member is located on a side of the support frame close to the pushing portion, and is used to abut against the pushing portion.

[0013] In one embodiment, the transmission component includes a transmission belt, and the number of the toggle members is multiple, and the multiple toggle members are arranged at intervals along the transmission surface of the transmission belt.

[0014] In one embodiment, the first transmission assembly includes a rack extending along a first direction, and the second transmission assembly also includes a gear connected to the roller, the gear is located on one side of the roller along the first direction and meshes with the rack, and the gear rolls on the rack along the first direction, driving the roller to roll along the first direction.

[0015] In one embodiment, there are two racks, and the two racks are respectively located on both sides of the roller along the first direction. A protrusion is provided on the side of the two racks close to the roller, and a guide channel is formed between the two protrusions. Part of the roller is located in the guide channel, and the guide channel is used to guide the direction of movement of the roller.

[0016] In one embodiment, the second transmission assembly further includes a connecting member, one end of the connecting member is located on one side of the roller along the first direction and between the roller and the gear, and the other end of the connecting member is connected to the bracket, and the bracket drives the second transmission assembly to move along the first direction through the connecting member.

[0017] The present invention also provides a circuit board liquid homogenization processing device, comprising the circuit board transmission mechanism described in any one of the aforementioned embodiments.

[0018] The technical solution of the present invention is to rotatably arrange the turntable on the bracket so that the circuit board on the turntable is installed vertically, and drive the toggle member to move through the transmission component, and the toggle member pushes the bracket to move along the first direction, so that the roller in the second transmission component drives the turntable to rotate, and the circuit board rotates as the turntable rotates; after the board surface of the circuit board is soaked in the medicine liquid, the medicine liquid will flow under the action of gravity or centrifugal force, and the rotation of the circuit board can make the medicine liquid evenly distributed on its board surface, and the excess medicine liquid will drip or be thrown out, avoiding the generation of a pool effect, preventing residual medicine liquid from causing excessive treatment of local areas of the board surface, and at the same time avoiding the situation where the medicine liquid has uneven treatment effects on the upper and lower parts of the board surface when the circuit board is vertical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of an embodiment of a circuit board transmission mechanism of the present invention;

[0021] Figure 2 This is a structural diagram of another embodiment of the circuit board transmission mechanism of the present invention;

[0022] Figure 3 This is a structural diagram of the toggle member in the present utility model;

[0023] Figure 4 This is a schematic diagram of the structure of some drive components in the utility model;

[0024] Figure 5 This is a structural diagram of another embodiment of the circuit board transmission mechanism of the present invention;

[0025] Figure 6 This is a schematic structural diagram of the second transmission assembly in the present utility model;

[0026] Figure 7 This is a structural diagram of another embodiment of the circuit board transmission mechanism of the present invention.

[0027] Description of Figure Numbers:

[0028] 100-circuit board transmission mechanism, 200-circuit board;

[0029] 110-base;

[0030] 120-carrying assembly, 121-bracket, 1211-auxiliary wheel, 1212-cross bar, 122-turntable;

[0031] 130 - first transmission assembly, 131 - rack, 131a - guide channel, 1311 - protrusion;

[0032] 140 - second transmission assembly, 141 - roller, 141a - snap-fit groove, 142 - gear, 143 - connector, 144 - rotating shaft;

[0033] 150-driving assembly, 151-transmission assembly, 152-moving member, 1521-support frame, 1522-limiting part, 15221-first limiting part, 15223-second limiting part, 1523-moving rod, 1524-guide part, 1525-pushing part, 1526-counterweight part, 1527-hinge part, 153-transmission belt.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0038] During the printed circuit board (PCB) processing process, the boards typically undergo a series of steps, including development, washing, etching, and drying. Existing liquid treatment equipment typically positions the boards horizontally before processing. Typically, when the boards are positioned horizontally, the process of spraying them with liquid chemical can create a pooling effect—water pooling—on the board surface, resulting in uneven treatment across the board. This is because it's difficult to position the boards perfectly horizontally during processing.

[0039] To solve the above problems, please refer to Figure 1 and Figure 2 The present invention provides a circuit board transmission mechanism 100, which includes:

[0040] base 110;

[0041] The material loading assembly 120 includes a bracket 121 and a turntable 122. The turntable 122 is rotatably mounted on the bracket 121 and is used to fix the circuit board 200.

[0042] The first transmission assembly 130 is provided on the base 110;

[0043] The second transmission assembly 140 is disposed on the bracket 121. The second transmission assembly 140 includes a roller 141. The roller 141 is rotatably disposed on the first transmission assembly 130 along a first direction. The roller 141 is located below the turntable 122.

[0044] The driving assembly 150 includes a transmission assembly 151 and a toggle member 152. The transmission assembly 151 is used to drive the toggle member 152 to move, so as to push the bracket 121 to move along the first direction. The bracket 121 moves and drives the second transmission assembly 140 to move; when the second transmission assembly 140 moves along the first direction, the roller 141 rolls on the first transmission assembly 130 with the movement of the second transmission assembly 140, and drives the turntable 122 to rotate.

[0045] In this embodiment, the turntable 122 is rotatably provided on the bracket 121, so that the circuit board 200 on the turntable 122 is installed vertically, and the transmission component 151 drives the toggle member 152 to move, and the toggle member 152 pushes the bracket 121 to move along the first direction, so that the roller 141 in the second transmission component 140 drives the turntable 122 to rotate, and the circuit board 200 rotates as the turntable 122 rotates; after the surface of the circuit board 200 is soaked in the liquid medicine, the liquid medicine will flow under the action of gravity or centrifugal force, and the rotation of the circuit board 200 can make the liquid medicine evenly distributed on its surface, and the excess liquid medicine will drip or be thrown out, avoiding the generation of a pool effect, preventing the residual liquid medicine from causing excessive treatment of a local area of the board surface, and at the same time avoiding the situation where the liquid medicine has uneven treatment effects on the upper and lower parts of the board surface when the circuit board 200 is vertical.

[0046] It can be understood that the first transmission assembly 130 is arranged on the base 110, and the base 110 and the first transmission assembly 130 do not move with the movement of the bracket 121. In some embodiments, the first transmission assembly 130 includes multiple sets of rollers, and the roller 141 rolls on the multiple sets of rollers as the second transmission assembly 140 moves, thereby converting the translation of the bracket 121 into the rolling of the roller 141 during the transmission process. In other embodiments, the first transmission assembly 130 is not limited.

[0047] It should be noted that the roller 141 is located below the turntable 122, and below refers to below along the direction of gravity. The first direction refers to the direction in which the circuit board 200 moves when the circuit board 200 is being processed.

[0048] In addition, if the transmission component 151 rotates rapidly, causing the circuit board 200 to rotate rapidly, the chemical liquid on the circuit board 200 can still be evenly diffused from the center to the surrounding areas under the action of centrifugal force. However, the edges of the circuit board 200 will be treated again by the chemical liquid diffused outward from the axial position of the turntable 122, resulting in uneven treatment effects in the middle and surrounding areas of the circuit board 200. Therefore, in one embodiment, the drive component 150 drives the turntable 122 to rotate slowly so that the chemical liquid on the circuit board 200 always flows from top to bottom, so that each area of the circuit board 200 can be evenly treated by the chemical liquid.

[0049] In the embodiment of the present invention, please refer to Figure 3 and Figure 4The toggle member 152 includes a support frame 1521 and a toggle rod 1523. The support frame 1521 is connected to the transmission assembly 151. A limiting portion 1522 is provided on the support frame 1521. The toggle rod 1523 is rotatably provided on the support frame 1521. The toggle rod 1523 has an initial state and an abutting state. In the initial state, the toggle rod 1523 is spaced apart from the limiting portion 1522. In the abutting state, the toggle rod 1523 is limited to the limiting portion 1522 and abuts against the bracket 121.

[0050] In this embodiment, after the lever 1523 rotates to a certain angle, it is limited by the limiting portion 1522 and abuts against the bracket 121. By rotating to a certain angle, the lever 1523 reduces the contact force with the bracket 121, buffers the collision between the two, and reduces the risk of damage to the bracket 121 or the lever 1523 due to collision, thereby extending the service life of the lever 1523 and the bracket 121.

[0051] It can be understood that in the initial state of the lever 1523, the lever 1523 and the limit portion 1522 are spaced apart, that is, the lever 1523 does not abut against the limit portion 1522, and the lever 1523 has a rotatable space; when the lever 1523 pushes the bracket 121 to the specified position under the drive of the transmission component 151, the lever 1523 can return to the initial state by its own weight or other driving members. In one embodiment, in the abutting state, a counterweight portion 1526 is provided at the end of the lever 1523 away from the bracket 121, and the weight of the counterweight portion 1526 is greater than the weight of the lever 1523 away from the counterweight portion 1 At one end of 526, the lever 1523 is limited by the limiting portion 1522 after rotation. Therefore, the lever 1523 is in an inclined state at this time. After the lever 1523 pushes the bracket 121 to the specified position under the drive of the transmission assembly, the force applied by the bracket 121 to the lever 1523 in the first direction is lost. In order to avoid the weight of the end of the lever 1523 close to the bracket 121 being greater than the end away from the bracket 121, which causes the lever 1523 to always be in an abutting state and unable to reset when it returns to the initial state under the influence of gravity, a counterweight portion 1526 is provided to enable the lever 1523 to return to the initial state.

[0052] In the embodiment of the present invention, please refer to Figure 3 and Figure 4 The shift rod 1523 has a guide portion 1524 and a push portion 1525. The guide portion 1524 and the push portion 1525 are arranged at the same end of the shift rod 1523 and are arranged opposite to each other. The guide portion 1524 is inclined in the direction away from the transmission component 151 and biased toward the push portion 1525. The bracket 121 includes a cross bar 1212. The guide portion 1524 is used to guide the cross bar 1212 to abut against the push portion 1525. The push portion 1525 pushes the cross bar 1212 to move under the drive of the transmission component 151.

[0053] In this embodiment, the guide portion 1524 is inclined in the direction away from the transmission component 151 and biased towards the pushing portion 1525, that is, in the initial state, the end of the lever 1523 provided with the guide portion 1524 gradually increases in size downward in the vertical direction; when the circuit board transmission mechanism 100 is not started, when the loading component 120 is transmitted upstream to the mechanism, the bracket 121 moves along the first direction, the cross bar 1212 of the bracket 121 collides with the lever 1523, and the cross bar 1212 moves along the guide portion 1524, causing the lever 1523 to rotate, and then the cross bar 1212 is separated from the lever 1523. At this time, the lever 1523 is restored to its initial state through a driving member (not shown in the figure), so that the pushing portion 1525 of the lever 1523 is toward the cross bar 1212, so that when the transmission mechanism is started, the lever 1523 can be driven to push the bracket 121 to move.

[0054] In the embodiment of the present invention, please refer to Figure 3 The shift lever 1523 also includes a counterweight portion 1526, which is located at one end of the shift lever 1523 away from the guide portion 1524 and is used to restore the shift lever 1523 in the abutment state to its initial state. The shift lever 1523 also includes a hinge portion 1527, which is located between the guide portion 1524 and the counterweight portion 1526. The hinge portion 1527 is hinged to the support frame 1521, and the hinge portion 1527 rotates to rotate the shift lever 1523.

[0055] In this embodiment, in order to enable the shift lever 1523 in the abutment state to quickly restore to its initial state, a counterweight portion 1526 is provided at the end of the shift lever 1523 away from the guide portion 1524, that is, the guide portion 1524 and the counterweight portion 1526 are arranged opposite to each other, so that when the shift lever 1523 is in the abutment state and tilted in one direction, the counterweight portion 1526 can be used to tilt the shift lever 1523 in that direction to restore to its initial state.

[0056] In an embodiment of the present invention, please refer to the figure, the toggle member 152 and the toggle rod 1523 are rotatably disposed in the support frame 1521, and the limiting portion 1522 is disposed in the support frame 1521. The limiting portion 1522 includes a first limiting member 15221 and a second limiting member 15223. The first limiting member 15221 is located on a side of the support frame 1521 close to the guide portion 1524 and is used to abut against the guide portion 1524. The second limiting member 15223 is located on a side of the support frame 1521 close to the pushing portion 1525 and is used to abut against the pushing portion 1525.

[0057] In this embodiment, a first stopper 15221 is disposed within an end of the support frame 1521 distal from the transmission assembly 151, and a second stopper 15223 is disposed within a portion of the support frame 1521 proximal to the transmission assembly 151. When the lever 1523 is in contact, the end of the lever 1523 proximal to the support frame 121 abuts the first stopper 15221, while the end of the lever 1523 distal from the support frame 121 abuts the second stopper 15223. The first stopper 15221 and the second stopper 15223 are located on opposite sides of the lever 1523, respectively, and cooperate to limit the rotation angle of the lever 1523. In one embodiment, the first stopper 15221 and the second stopper 15223 are removably connected to the support frame 1521. The stopper is made of a highly elastic silicone or rubber material to prevent damage to the lever 1523 or the stopper from occurring due to frequent collisions between the lever 1523 and the stopper.

[0058] In the embodiment of the present invention, please refer to Figure 4 The transmission component 151 includes a transmission belt 153 , and the number of the toggle members 152 is multiple, and the multiple toggle members 152 are arranged at intervals along the transmission surface of the transmission belt 153 .

[0059] In this embodiment, a plurality of toggle members 152 are spaced apart along the transmission surface of the conveyor belt 153, so that the toggle member 152 always keeps in contact with the bracket 121 on the side of the conveyor belt 153 close to the bracket 121, so that when the carrier assembly 120 is transmitted from the upstream mechanism to this mechanism, the toggle member 152 always keeps in contact with the bracket 121, so that when the driving assembly 150 is started, it can push the carrier assembly 120 to work.

[0060] In the embodiment of the present invention, please refer to Figure 5 The first transmission assembly 130 includes a rack 131, which extends along the first direction. The second transmission assembly 140 also includes a gear 142 that is transmission-connected to the roller 141. The gear 142 is located on one side of the roller 141 along the first direction and meshes with the rack 131. The gear 142 rolls on the rack 131 along the first direction, driving the roller 141 to roll along the first direction.

[0061] In this embodiment, the rack 131 and gear 142 cooperate to drive the roller 141, reducing vibrations of the roller 141 caused by other transmission methods, providing a stable transmission for the turntable 122, and thus reducing the risk of damage to the circuit board 200 on the turntable 122 due to vibration. The meshing force between the rack 131 and gear 142 prevents the roller 141 from falling off the first transmission assembly 130, thereby improving the stability of the present invention. In one embodiment, there are two racks 131, each located on either side of the roller 141 along the first direction, and two gears 142, each meshing with the two racks 131. The cooperation between the two gears 142 and the two racks 131 prevents the roller 141 from deviating from the first direction when rolling, thereby improving the accuracy of the present invention. In one embodiment, the roller 141 and gear 142 are connected by a rotating shaft 144.

[0062] In the embodiment of the present invention, please refer to Figure 7 There are two racks 131, and the two racks 131 are respectively located on both sides of the roller 141 along the first direction. A protrusion 1311 is provided on the side of the two racks 131 close to the roller 141, and a guide channel 131a is formed between the two protrusions 1311. Part of the roller 141 is located in the guide channel 131a, and the guide channel 131a is used to guide the direction of movement of the roller 141.

[0063] Furthermore, in order to ensure that the roller 141 is displaced along the first direction, the width of the guide channel 131a formed by the protrusions 1311 of the two racks 131 matches the width of the roller 141 to ensure that the roller 141 is displaced within the guide channel 131a. It can be understood that the guide channel 131a extends along the first direction.

[0064] It should be noted that when installing the roller 141, the two protrusions 1311 can be used as positioning parts. Installing the roller 141 in the guide channel 131a between the two protrusions 1311 is considered to be the completion of the installation of the roller 141, thereby improving the assembly and disassembly efficiency of the present invention.

[0065] In the embodiment of the present invention, please refer to Figure 6 The second transmission assembly 140 also includes a connecting member 143, one end of the connecting member 143 is located on one side of the roller 141 along the first direction and is located between the roller 141 and the gear 142, and the other end of the connecting member 143 is connected to the bracket 121, and the bracket 121 drives the second transmission assembly 140 to move along the first direction through the connecting member 143.

[0066] In this embodiment, the second transmission assembly 140 also includes a rotating shaft 144, which passes through the center of the roller 141 and the gear 142 to realize the transmission connection between the roller 141 and the gear 142. A bearing seat (not shown in the figure) is provided on the side of the roller 141 along the first direction outside the rotating shaft 144. A bearing is provided in the bearing seat, and the bearing seat is located between the roller 141 and the gear 142. The connecting member 143 is fixedly connected to the bearing seat. Therefore, when the bracket 121 drives the second transmission assembly 140 to move through the connecting member 143, the rotating shaft 144, the roller 141 and the gear 142 roll along the first direction, and the connecting member 143 moves along the first direction, thereby realizing the conversion of the translation of the bracket 121 into the rolling of the roller 141, and finally driving the rotation of the turntable 122.

[0067] In one embodiment, the roller 141 is provided with a circumferential engaging groove 141a, in which a portion of the outer edge of the turntable 122 is engaged. The roller 141 rolls in a first direction, and the friction between the wall of the engaging groove 141a and the turntable 122 drives the turntable 122 to rotate. The bracket 121 is provided with an auxiliary wheel 1211, which is provided with a circumferential fixing groove (not shown) in which a portion of the outer edge of the turntable 122 is engaged. The auxiliary wheel 1211 is used to secure the turntable 122 to prevent it from escaping from the engaging groove 141a.

[0068] In one embodiment, the driving assembly 150 also includes a motor, which drives the transmission chain to rotate, and the rotation of the transmission chain drives the toggle member 152 to rotate. During the rotation process, when the toggle member 152 rotates to the same plane as the cross bar 1212, the toggle member 152 pushes the cross bar 1212 to move in the first direction, thereby driving the bracket 121 to move along the first direction.

[0069] The present utility model also proposes a circuit board liquid homogenization processing device, which includes a spray device and a circuit board transmission mechanism 100. The specific structure of the circuit board transmission mechanism 100 refers to the above embodiment. Since the present circuit board liquid homogenization processing device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0070] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A circuit board transmission mechanism, characterized in that: include: base; The material loading assembly includes a bracket and a turntable, wherein the turntable is rotatably mounted on the bracket and is used to fix the circuit board; A first transmission assembly is provided on the base; a second transmission assembly, disposed on the bracket, the second transmission assembly comprising a roller, the roller being rotatably disposed on the first transmission assembly along a first direction, the roller being located below the turntable; as well as The driving assembly includes a transmission assembly and a toggle member. The transmission assembly includes a transmission belt. There are multiple toggle members, and the multiple toggle members are arranged at intervals along the transmission surface of the transmission belt. The transmission assembly is used to drive the toggle member to move to push the bracket to move in the first direction. The bracket moves and drives the second transmission assembly to move; when the second transmission assembly moves in the first direction, the roller rolls on the first transmission assembly as the second transmission assembly moves, and drives the turntable to rotate.

2. The circuit board transmission mechanism according to claim 1, wherein: The toggle member includes a support frame and a toggle rod, the support frame is connected to the transmission assembly, a limiting portion is provided on the support frame, the toggle rod is rotatably provided on the support frame, and the toggle rod has an initial state and an abutting state; in the initial state, the toggle rod is spaced apart from the limiting portion; in the abutting state, the toggle rod is limited to the limiting portion and abuts against the bracket.

3. The circuit board transmission mechanism according to claim 2, wherein: The shift rod has a guide portion and a push portion, and the guide portion and the push portion are arranged at the same end of the shift rod and are arranged opposite to each other. The guide portion is inclined in the direction away from the transmission component and biased toward the push portion. The bracket includes a cross bar, and the guide portion is used to guide the cross bar to abut against the push portion. The push portion pushes the cross bar to move when driven by the transmission component.

4. The circuit board transmission mechanism according to claim 3, wherein: The shift lever also includes a counterweight portion, which is located at one end of the shift lever away from the guide portion and is used to restore the shift lever in the abutment state to the initial state. The shift lever also includes a hinge portion, which is located between the guide portion and the counterweight portion. The hinge portion is hinged to the support frame, and the hinge portion rotates to rotate the shift lever.

5. The circuit board transmission mechanism according to claim 3, wherein: The shift rod is rotatably disposed in the support frame, and the limiting portion is disposed in the support frame. The limiting portion includes a first limiting member and a second limiting member. The first limiting member is located on a side of the support frame close to the guide portion and is used to abut against the guide portion. The second limiting member is located on a side of the support frame close to the push portion and is used to abut against the push portion.

6. The circuit board transmission mechanism according to claim 1, wherein: The first transmission assembly includes a rack extending along a first direction. The second transmission assembly also includes a gear connected to the roller. The gear is located on one side of the roller along the first direction and meshes with the rack. The gear rolls on the rack along the first direction, driving the roller to roll along the first direction.

7. The circuit board transmission mechanism according to claim 6, wherein: There are two racks, which are respectively located on both sides of the roller along the first direction. A protrusion is provided on the side of the two racks close to the roller, and a guide channel is formed between the two protrusions. Part of the roller is located in the guide channel, and the guide channel is used to guide the direction of movement of the roller.

8. The circuit board transmission mechanism according to claim 6, wherein: The second transmission assembly also includes a connecting member, one end of which is located on one side of the roller along the first direction and between the roller and the gear, and the other end of the connecting member is connected to the bracket, and the bracket drives the second transmission assembly to move along the first direction through the connecting member.

9. A circuit board liquid homogenization processing device, characterized in that: The circuit board transmission mechanism comprises the circuit board transmission mechanism according to any one of claims 1 to 8.

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