Multi-layer baking tray trolley for PCB production

Abstract

The present invention discloses a multi-layer baking plate cart for PCB board production, comprising a seat plate, a wheel structure provided on the bottom surface of the seat plate, and two protruding and spaced-apart mounting columns provided on the surface; further comprising a multi-layer frame for placing PCB boards, wherein opposite sides of all frames are flipped and connected to opposite sides of the mounting columns; a preset distance is provided between adjacent frames, and any frame has a first use state in which the angle with the mounting columns is 90°, and a second use state in which the angle is less than 90°; the frame and the mounting columns are matched with each other through a rotating shaft, so that the frame and the mounting columns have two use states, and the technician can switch the multi-layer frame from the second use state to the first use state in sequence from the bottom to the top, so that the frame for operation has a larger working space, which is convenient for users to quickly place or remove PCB boards.

Description

Technical Field

[0001] The invention relates to the field of PCB board production, and in particular to a multi-layer baking plate cart for PCB board production. Background Art

[0002] PCB boards, also known as circuit boards, are widely used in the electronics field, such as printed circuit boards and flexible circuit boards. The unloading process at the beginning of PCB board processing includes: high-temperature baking → board separation → transportation → other process production. The purpose of high-temperature baking is to eliminate the internal stress of the substrate itself, ensure the stability of the product, and avoid deformation or warping of the finished PCB. It can be seen that during the high-temperature baking stage, technicians have the need to transport PCB boards to the oven for baking in batches, and to cool the PCB boards in the residual heat state in batches. In the prior art, this is usually achieved by a baking trolley. For example, the utility model patent with Chinese application number CN201711419040.X discloses a PCB board baking turnover trolley. The PCB boards are placed in batches through a multi-layer rectangular frame structure, which can be directly placed in the oven for baking or cooled after baking. However, it was found that the multi-layer rectangular frame and the connector of the device are relatively simple, making it difficult to quickly place or remove the PCB boards. Therefore, a more rational structure of the baking trolley is urgently needed to address the shortcomings of the prior art. Summary of the Invention

[0003] The present invention provides a solution to the technical problem that the multi-layer rectangular frame and connectors of the baking tray cart in the prior art are relatively simple to match, making it difficult to quickly place or remove the PCB board.

[0004] To achieve the above-mentioned objectives, the present invention provides a multi-layer baking plate cart for PCB board production, comprising a seat plate, the bottom surface of which is provided with a wheel structure, and the surface of which is provided with two protruding and spaced-apart mounting columns; it also comprises multiple layers of frames for placing PCB boards, and the opposite sides of all the frames are flipped and connected to the opposite sides of the mounting columns; there is a preset distance between adjacent frames, and any of the frames has a first usage state in which the angle with the mounting columns is 90°, and a second usage state in which the angle is less than 90°.

[0005] As an improved solution of the present application, any of the frames is provided with a plurality of support rods, and the two ends of the plurality of groups of support rods are correspondingly connected to the two opposite inner walls of the frame.

[0006] As an improved solution of the present application, multiple groups of support rods are arranged at intervals and centered on the center line of the frame to form a first support area and a second support area, and the spacing density of the support rods in the first support area is less than the spacing density of the support rods in the second support area; wherein the distance between the mounting column and the first support area is less than the distance between the mounting column and the second support.

[0007] As an improved solution of the present application, it further includes multiple groups of limiting devices arranged between one of the mounting columns and any of the frames, and the limiting devices are used to make the frame connected thereto stop when tilting.

[0008] As an improved solution of the present application, the limiting device includes a connecting member and a return member connected in sequence, the end of the connecting member away from the return member is connected to the mounting column, and the return member is detachably connected to a connecting ear fixed on the outer side of the corresponding frame.

[0009] As an improved solution of the present application, the return member is a spring or cylinder structure.

[0010] As an improved solution of the present application, when the return member is a spring, the connecting member is provided with a threaded portion, and the threaded portion is adapted to be connected to the thread of the mounting column.

[0011] As an improved solution of the present application, one end of the spring is fixedly connected to the mounting post, and the other end is connected to the connecting ear via a hook.

[0012] As an improved solution of the present application, the two side corners of the frame are also equipped with corner pieces, one end of the corner piece is provided with a platform surface, and the other end is provided with a standing leg; the standing leg of the corner piece of the upper layer that is not the last layer and is adjacent to the upper layer abuts against the platform of the corner piece of the next layer.

[0013] As an improved solution of the present application, a push handle structure is also included, wherein both ends of the push handle structure are bent and commonly connected to a mounting column at the same end, and the middle portion of the push handle structure forms a gripping portion.

[0014] The beneficial effects of the present invention are as follows: compared with the prior art, the present invention provides a multi-layer baking plate cart for PCB board production, comprising a seat plate, a wheel structure provided on the bottom surface of the seat plate, and two protruding and spaced-apart mounting columns provided on the surface; further comprising a multi-layer frame for placing PCB boards, and all frames are connected to the opposite sides of the mounting columns on a flipped surface; adjacent frames are provided with a preset distance, and any frame has a first use state in which the angle with the mounting columns is 90°, and a second use state in which the angle is less than 90°; the frame and the mounting columns are matched with each other through a rotating shaft, so that the frame and the mounting columns have two use states, and technicians can switch the multi-layer frame from the second use state to the first use state in sequence from the bottom to the top, so that the frame for operation has a larger working space, which is convenient for users to quickly place or remove PCB boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A perspective view of the present invention;

[0016] Figure 2 For the present invention Figure 1 A local enlarged view of area A;

[0017] Figure 3 For the present invention Figure 1 A local enlarged view of area B.

[0018] The main component symbols are described as follows:

[0019] 1. Seat plate; 2. Wheel structure; 3. Mounting column; 4. Frame; 41. Support rod; 42. Connecting lug;

[0020] 5. Connecting piece; 51. Threaded portion; 6. Spring member; 61. Hook; 7. Angle piece; 71. Platform surface;

[0021] 72. Standing foot; 8. Push handle structure. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0023] In the following description, example details are provided to provide a deeper understanding of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. It should be understood that the specific embodiments are only used to illustrate the present invention and are not intended to limit the present invention.

[0024] It should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the existence of the stated features, integers, steps, operations, elements or components, but do not exclude the existence or addition of one or more other features, integers, steps, operations, elements, components or combinations thereof.

[0025] Aiming at the technical problem that the multi-layer rectangular frame and the connecting piece 5 of the baking plate cart in the prior art are relatively simple and it is difficult to quickly place or remove the PCB board, the present application provides a multi-layer baking plate cart for PCB board production. Figure 1 To the attached Figure 3 The base plate 1 includes a wheel structure 2 on its bottom surface and two protruding and spaced mounting posts 3 on its surface. The base plate 1 also includes multiple layers of frames 4 for placing PCBs. The opposite sides of all frames 4 are connected to the mounting posts 3 on opposite sides. There is a preset distance between adjacent frames 4, and each frame 4 has a first use state in which the angle between the frame 4 and the mounting posts 3 is 90 degrees, and a second use state in which the angle is less than 90 degrees.

[0026] The scheme of the application is further elaborated below in combination with specific usage situations: During the prevention process of the PCB board, the mounting column 3 and the frame 4 are flipped and matched, and the frame 4 located at the bottom layer is in the first usage state, and the remaining frames 4 are in the second usage state, so that the frame 4 located at the bottom layer can obtain a larger working space, and the user can quickly place the PCB board. After the placement is completed, the frame 4 of the upper layer is switched from the second usage state to the first usage state, and the PCB board is placed again, and the above-mentioned board placement steps are repeated until the PCB board or the frame 4 of the cart is placed with a PCB board; then it is moved to the oven for baking through the wheel structure 2. After baking is completed, batch operation is effectively realized.

[0027] It can be seen that the frame 4 and the mounting column 3 cooperate with each other through the rotating shaft, so that the frame 4 and the mounting column 3 have two usage states. The technician can switch the multi-layer frame 4 from the second usage state to the first usage state from the bottom to the top, so that the frame 4 for operation has a larger working space, which is convenient for users to quickly place or remove the PCB board.

[0028] In order to provide stability for the placement of the PCB board, in this embodiment, any frame 4 is provided with multiple support rods 41, and the two ends of the multiple groups of support rods 41 are correspondingly connected to the two opposite inner walls of the frame 4; it is not difficult to understand that the PCB board is supported by the multiple support rods 41, and the PCB board can be stably placed.

[0029] In actual use, it was found that when the cart was transported after being fully loaded with PCB boards, the cart's weight distribution was not uniform due to the large number of structural parts in the installation section, resulting in difficulty in starting. Therefore, in this embodiment, multiple groups of support rods 41 were arranged at intervals and centered on the center line of the frame 4 to form a first support area and a second support area. The spacing density of the support rods 41 in the first support area was less than the spacing density of the support rods 41 in the second support area; wherein, the distance between the installation column 3 and the first support area was less than the distance between the installation column 3 and the second support; through the above design, when fully loaded, the overall weight of the cart and the PCB boards is more uniform, which is convenient for technicians to move and transport, especially easier in the starting stage.

[0030] An important solution also includes multiple groups of limit devices arranged between one mounting column 3 and any frame 4, and the limit devices are used to stop the frame 4 connected thereto when tilted; it is not difficult to understand that multiple limit devices are provided, corresponding to the mounting columns 3 and the frames 4 respectively, and the frames 4 can be tilted and stopped by the limit devices. For example, the bottom frame 4 can be maintained in the first usage state through the limit device, and the other frames 4 can be maintained in the second usage state through the limit device, maintaining a larger assembly opening, thereby facilitating the technician to place or remove the PCB board; the specific limit device can be implemented by a positioning pin, a ratchet structure, a card structure or a column structure.

[0031] In the preferred solution, the limiting device includes a connecting member and a return member connected in sequence, the end of the connecting member away from the return member is connected to the mounting column 3, and the return member is detachably connected to the connecting ear 42 fixed on the outer side of the corresponding frame 4; it is not difficult to understand that the return member can provide a suitable fastening force to make the frame 4 in a stable tilted state. In this embodiment, the return member forms a suitable gravitational force on the connecting ear 42 to fix its frame 4. When the multiple frames 4 are in the second state, it is necessary to increase the tightening force through the return member so that the multiple frames 4 can be in a more compact folded state, which is convenient for the frame material in the first state to operate; in the specific solution, the return member is a spring 6 or a hydraulic rod structure.

[0032] In the preferred solution, when the return member is a spring 6, the connecting member is provided with a threaded portion 51, and the threaded portion 51 is adapted to be connected with the threaded hole of the mounting post 3; in the specific coordination, the technician can control the screwing depth of the threaded hole and the threaded portion 51 so that the multi-layer frame 4 all maintains the second usage state and is stored together in a folded shape. At this time, the spring 6 provides appropriate elastic force to achieve a better tightening and folding effect; in a more preferred embodiment, with respect to the connection between the spring 6 and the frame 4, one end of the spring 6 is fixedly connected to the mounting post 3, and the other end is connected to the connecting ear 42 through a hook 61. The hook 61 can be used repeatedly, and the hook 61 in a closed state can form a stable connection relationship with the hole portion of the connecting ear 42, which is not easy to fall out, and can maintain the stability of the frame 4 in the second usage state.

[0033] In a further embodiment, corner pieces 7 are further provided at both sides of the frame 4. One end of the corner piece 7 is provided with a platform surface 71, and the other end is provided with a foot portion 72. The foot portion 72 of the corner piece 7 of the upper layer adjacent to the non-last layer abuts against the platform of the corner piece 7 of the lower layer. It is not difficult to understand that when fully loaded with PCB boards, the multi-layer frame 4 is in the first use state, and the corner pieces 7 of the two adjacent middle layers overlap and fit each other, that is, the foot portion 72 of the corner piece 7 of one layer of the frame 4 abuts against the platform surface 71 of the corner piece 7 of the lower layer, so that the multi-layer frame 4 can maintain the stable first use state at the same time.

[0034] It is worth further explaining that the limit device and the connecting ear 42 structure mentioned in the present application are arranged on one side of the cart, and can also be arranged on both sides, preferably on both sides of the cart, which can make the working stability of the cart frame 4 better.

[0035] In this embodiment, a push handle structure 8 is also included. The two ends of the push handle structure 8 are bent and connected to the mounting column 3 at the same end. The middle part of the push handle structure 8 forms a gripping portion. The technician holds the gripping portion in the push handle structure 8 to transfer the PCB board or push the cart into the oven for processing.

[0036] The advantages of the present invention are:

[0037] 1. The frame and the mounting column cooperate with each other through the rotating shaft, so that the frame and the mounting column have two usage states. The technician can switch the multi-layer frame from the bottom to the top from the second usage state to the first usage state in sequence, so that the working frame has a larger working space, which is convenient for users to quickly place or remove the PCB board.

[0038] 2. The corners of the frame are also equipped with corner fittings, which makes the cart more stable when fully loaded with PCB boards.

[0039] 3. The support rod is divided into sections. When used under the state of full PCB board, the weight distribution is more reasonable and it can be used more quickly.

[0040] The above disclosures are only several specific embodiments of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A multi-layer baking sheet cart for PCB board production, characterized in that: The base comprises a seat plate, the bottom surface of which is provided with a wheel structure, and the surface of which is provided with two protruding and spaced mounting posts; the base plate also comprises a plurality of frames for accommodating PCB boards, and opposite sides of all the frames are connected to opposite sides of the mounting posts in a flipped manner; adjacent frames are spaced apart by a predetermined distance, and each frame has a first use state in which the angle formed with the mounting posts is 90 degrees, and a second use state in which the angle is less than 90 degrees; Wherein, any of the frames is provided with a plurality of support rods, and the two ends of the plurality of groups of support rods are correspondingly connected to two opposite inner walls of the frame; the plurality of groups of support rods are arranged at intervals and centered on the midline of the frame to form a first support area and a second support area, and the spacing density of the support rods in the first support area is less than the spacing density of the support rods in the second support area; the distance between the mounting column and the first support area is less than the distance between the mounting column and the second support area; It also includes multiple groups of limiting devices arranged between one of the mounting columns and any of the frames, and the limiting devices are used to stop the frame connected thereto when tilting; the limiting devices include a connecting member and a return member connected in sequence, the end of the connecting member away from the return member is connected to the mounting column, and the return member is detachably connected to a connecting ear fixed on the outer side of the corresponding frame; the return member is a spring or hydraulic rod structure.

2. The multi-layer baking sheet cart for PCB board production according to claim 1, characterized in that: When the return member is a spring, the connecting member is provided with a threaded portion, and the threaded portion is adapted to be connected with the thread of the mounting post.

3. The multi-layer baking sheet cart for PCB board production according to claim 2, characterized in that: One end of the spring is fixedly connected to the mounting post, and the other end is connected to the connecting ear via a hook.

4. The multi-layer baking sheet cart for PCB board production according to any one of claims 1-3, characterized in that: The two side corners of the frame are also equipped with corner pieces, one end of the corner piece is provided with a platform surface, and the other end is provided with a standing foot; the standing foot of the corner piece of the upper layer that is not the last layer and is adjacent to the upper layer abuts against the platform of the corner piece of the next layer.

5. The multi-layer baking sheet cart for PCB board production according to any one of claims 1-3, characterized in that: The utility model also includes a push handle structure, wherein both ends of the push handle structure are bent and connected to a mounting column at the same end, and the middle portion of the push handle structure forms a gripping portion.

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