Tray provided with clamp and capable of adapting to production of ultrathin circuit board

Abstract

The utility model discloses a material tray with a clamp adaptable to ultrathin circuit board production, which comprises a support frame, the support frame is detachably connected with a support member, and the support member extends to an opening area in the middle of the support frame and is used for assisting in supporting a circuit board. According to the utility model, the direct contact area with the circuit board can be reduced through the flexible configuration of the supporting piece, the damage caused by friction can be effectively avoided, and the stability and safety of the circuit board in all stages such as transfer and storage can be ensured. In addition, due to the detachable connection mode of the supporting frame and the supporting piece, the tray can easily meet the production requirements of circuit boards of different sizes and shapes, and the production flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board production jigs, and more specifically, to a clamping tray which can adapt to the production of ultra-thin circuit boards. Background Art

[0002] With the rapid development of the electronics industry, circuit boards, as important components of electronic products, have increasingly higher requirements for precision and process, making circuit boards very light and thin, and with precise circuits. Therefore, the protection requirements for circuit boards are also getting higher and higher. For example, the effective area of ​​the circuit board surface cannot come into contact with or rub against other objects, and contact with unclean air should be avoided as much as possible.

[0003] Therefore, in the production process of circuit boards, the important fixture used for production, transportation, and storage of circuit boards—the material tray—plays a key role. Therefore, for the production of these thin, delicate circuit boards, the fixture must have minimal contact with the circuit board, provide stable support, and meet the requirements of various automated equipment, such as precise positioning, convenient separation and transportation, and the ability to perform board removal functions such as suction and clamping.

[0004] In order to better support the circuit board, some existing jigs are provided with a support plate in the opening area of ​​the jig. However, the contact area between the support plate and the circuit board is large, and it is easy to contact and rub against the effective area of ​​the circuit board.

[0005] The above shortcomings need to be improved. Utility Model Content

[0006] In order to solve or alleviate the problem that the existing circuit board fixture support structure is prone to contact and friction with the effective area of ​​the circuit board, the utility model provides a clamping tray that can adapt to the production of ultra-thin circuit boards.

[0007] The technical solution of this utility model is as follows:

[0008] A material tray with a clamp adaptable to the production of ultra-thin circuit boards comprises a support frame, to which a support member is detachably connected, and the support member extends to an opening area in the middle of the support frame for auxiliary support of the circuit board.

[0009] Furthermore, the support member is in line contact or point contact with the circuit board.

[0010] Furthermore, the support member is a wire, and both ends are connected to the support frame respectively.

[0011] Furthermore, the support member includes a core portion, and a protective portion is provided on the outer side of the core portion.

[0012] Furthermore, the core is a steel wire, and the protective part is polyurethane.

[0013] Furthermore, a limiting groove is provided on the supporting frame, and the end of the supporting member passes through the limiting groove. A positioning member is provided on the supporting member, and the positioning member abuts against the groove wall of the limiting groove.

[0014] Furthermore, the support frame is provided with a positioning groove extending from the inner side to the limiting groove, and the width of the positioning groove is equivalent to the cross-sectional size of the support line.

[0015] Furthermore, a material clamp is detachably connected to the support frame.

[0016] Furthermore, the support frame is provided with a mounting notch, a mounting boss is provided in the mounting notch, and a positioning hole is provided on the boss;

[0017] The material clamp includes an upper clamp and a lower clamp, the lower clamp is provided with a positioning column engaged with the positioning hole, the lower clamp is provided with a first magnetic member, the upper clamp is provided with a second magnetic member engaged with the first magnetic member, the lower clamp is provided with a pivot shaft, and the upper clamp is rotatably sleeved on the pivot shaft;

[0018] The supporting frame is provided with shaft unloading grooves at both ends of the pivot.

[0019] Furthermore, a tapered hole is provided on the upper surface of the support frame, and a positioning tapered pin is correspondingly provided on the lower surface of the support frame.

[0020] The beneficial effect of the present invention according to the above solution is that, through the flexible configuration of the support members, the present invention can reduce the direct contact area with the circuit board, effectively avoiding damage caused by friction, and ensuring the stability and safety of the circuit board during various stages of transportation and storage. In addition, the detachable connection between the support frame and the support members allows the material tray to easily adapt to the production needs of circuit boards of different sizes and shapes, thereby enhancing production flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the bottom structure of the utility model when the support member is installed;

[0023] Figure 2 This is a front structural diagram of the present invention when no support member is installed;

[0024] Figure 3This is a schematic diagram of the bottom structure of the utility model when no support member is installed;

[0025] Figure 4 This is a schematic diagram of the partial explosion structure of the utility model when the support member is not installed;

[0026] Figure 5 This is a schematic diagram of the structure of the utility model in a stacked state;

[0027] Figure 6 for Figure 2 A magnified view of the structure at center A;

[0028] Figure 7 for Figure 2 A magnified view of the structure at point B in the middle;

[0029] Figure 8 for Figure 3 A magnified view of the structure at point C in the middle;

[0030] Figure 9 for Figure 3 A magnified view of the structure at point D in the middle;

[0031] Figure 10 for Figure 4 Enlarged view of the structure at point E in the middle.

[0032] Among them, the figure marks in the figure are: 1. Support frame; 101. Closed step; 102. Support surface; 103. Closed frame; 104. Wear-resistant part; 105. Positioning detection through hole; 2. Support edge; 201. Protective rubber strip; 202. Support slope; 3. Lifting slot; 301. Notch; 302. Notch; 303. Arc mouth; 4. Installation notch; 401. Installation boss; 402. Unloading shaft slot; 5. Sensing slot; 6. Positioning slot; 701. Positioning cone pin; 702. Cone hole; 703. Limiting step; 8. Material clamp; 801. Upper clamp; 802. Lower clamp; 803. Pivot; 901. Limiting slot; 902. Positioning slot; 10. Support member; 11. Direction mark; 12. Marking member; 13. Clamping and taking plate mouth. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that when a component is referred to as being "fixed" or "set" or "connected" to another component, it may be located directly or indirectly on the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on this technical solution. The terms "first", "second", etc. are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0035] like Figures 1 to 3 As shown, a clamping tray suitable for the production of ultra-thin circuit boards described in one embodiment of the utility model includes a support frame 1, and a support member 10 is detachably connected to the support frame 1. The support member 10 extends to the middle opening area of ​​the support frame 1 to assist in supporting the circuit board.

[0036] During use, the operator can install the support member 10 on the support frame 1 according to the size and shape of the circuit board. The support member 10 extends to the middle opening area of ​​the support frame 1, contacts the non-effective area of ​​the circuit board, and provides auxiliary support for the ultra-thin circuit board, so that the circuit board can be placed stably on the support surface formed by the support frame 1 and the support member 10, preventing deformation or damage due to vibration during the production process. In addition, since the support member 10 is detachably connected to the support frame 1, it can be removed when it is no longer needed, which can further reduce the contact area between the material tray and the circuit board. At the same time, it is convenient to disassemble and install when replacement is required.

[0037] In this embodiment, the clamping tray improves the safety of ultra-thin circuit boards during production. The flexible configuration of the support members 10 reduces the area of ​​direct contact with the circuit boards, effectively preventing damage caused by friction and ensuring the stability and safety of the circuit boards during transportation and storage. Furthermore, the detachable connection between the support frame 1 and the support members 10 allows the tray to easily adapt to the production needs of circuit boards of different sizes and shapes, enhancing production flexibility.

[0038] In a preferred embodiment, the support member 10 is in line contact or point contact with the circuit board.

[0039] The contact method in this embodiment reduces the contact area between the support member 10 and the circuit board, preventing friction damage caused by large-area contact and ensuring the integrity of the circuit board surface and internal circuits. Friction is also reduced, reducing dust generated by friction and ensuring product quality. Specifically, the support surface of the support member 10 is an arc surface. When the contact surface is a cylindrical surface, the support member 10 and the circuit board are in line contact. When the contact surface is a spherical surface, the support member 10 and the circuit board are in point contact. Point contact generally has multiple contact points, which can reduce pressure.

[0040] like Figure 3 and Figure 9 As shown, in a preferred embodiment, the support member 10 is a wire, and both ends are connected to the support frame 1 respectively.

[0041] A limiting groove 901 is provided on the support frame 1, and the end of the support member 10 passes through the limiting groove 901. A positioning member is provided on the support member 10, and the positioning member abuts against the groove wall of the limiting groove 901. Specifically, positioning members are provided at both ends of the support member 10, and the positioning members include fixed positioning members and movable positioning members. At least one of the two ends is a movable positioning member. The fixed positioning member is welded or integrally formed with the support member 10, and the movable positioning member is threadedly connected to the support member 10, such as a nut. The movable positioning member is rotated to abut against the groove wall of the limiting groove 901, thereby fixing the support member 10, or the positioning member is moved away from the groove wall of the limiting groove 901 to loosen the support member 10. For frequently used material trays, fixed positioning members can be used at both ends of the support member 10, and the fixed positioning member is connected to the support member 10 by welding or crimping. A plurality of limiting grooves 901 can be provided on the support frame 1. According to the structural characteristics of the circuit board, the position of the support member 10 can be adjusted to be suitable for the production of different circuit boards. In actual application, the support member 10 can also be installed through a structure such as a snap fastener.

[0042] The support frame 1 is provided with a positioning groove 902 extending from the inner side to the limiting groove 901 , and the width of the positioning groove 902 is equivalent to the cross-sectional size of the support line.

[0043] During assembly, first, the two ends of the support member 10 are respectively passed through the preset limiting grooves 901 on the support frame 1. Positioning members are installed at both ends of the support member 10, and the positioning members include fixed positioning members and movable positioning members. By rotating the movable positioning member, it moves along the threaded portion of the support member 10 until it is tightly abutted against the groove wall of the limiting groove 901, thereby achieving a firm fixation of the support member 10. If the support member 10 needs to be adjusted or disassembled, it is only necessary to rotate the movable positioning member in the opposite direction to separate it from the groove wall of the limiting groove 901, and the support member 10 can be easily loosened. In addition, a positioning groove 902 is also designed on the inner side of the support frame 1, and its width matches the cross-sectional size of the support line. During installation, the support member 10 can be quickly and accurately guided to the position of the limiting groove 901.

[0044] In this embodiment, the retaining grooves 901 and positioning grooves 902 provide mounting locations for the support member 10, facilitating positioning, simplifying the installation process, and improving installation efficiency. Furthermore, the retaining grooves 901 and positioning grooves 902 accommodate the ends of the support member 10, ensuring the overall flatness and aesthetics of the tray, facilitating its use with automated equipment. Furthermore, the positioning members allow the user to adjust the tightness of the support member 10 according to actual needs, ensuring structural stability while facilitating subsequent maintenance and adjustments.

[0045] In a preferred embodiment, the support member 10 includes a core portion, and a protective portion is disposed outside the core portion.

[0046] The core is steel wire and the protective part is polyurethane, making the surface of the protective part smooth and wear-resistant.

[0047] In this embodiment, the steel wire core provides stable support and stability, ensuring that the ultra-thin circuit board is stably supported during production, transportation, and storage. The polyurethane protective portion improves the durability and reliability of support member 10, protecting the steel wire core from external environmental erosion, such as moisture and corrosion. Its smooth surface reduces friction and wear, extending the service life of support member 10 and protecting the circuit board.

[0048] like Figure 4 、 Figure 6 and Figure 10 As shown, in a preferred embodiment, a material clamp 8 is detachably connected to the support frame 1 .

[0049] The support frame 1 is provided with a mounting notch 4, a mounting boss 401 is provided in the mounting notch 4, and a positioning hole is provided on the boss;

[0050] The material clamp 8 includes an upper clamp 801 and a lower clamp 802. The lower clamp 802 is provided with a positioning column engaged with the positioning hole. The lower clamp 802 is provided with a first magnetic member. The upper clamp 801 is provided with a second magnetic member that engages with the first magnetic member. A pivot 803 is provided through the lower clamp 802, and the upper clamp 801 is rotatably sleeved on the pivot 803.

[0051] The support frame 1 is provided with shaft removal grooves 402 at both ends of the pivot 803 .

[0052] During assembly, the operator first aligns the positioning column of the lower clamp 802 with the positioning hole in the mounting notch 4 of the support frame 1, snaps it into place, and then secures it by welding or screw fasteners. Next, the operator places the upper clamp 801 on the lower clamp 802, and passes the pivot 803 through the upper clamp 801 and the lower clamp 802, so that the upper clamp 801 and the lower clamp 802 are rotatably connected. When releasing the material, press the upper clamp 801 so that one side of the upper clamp 801 rotates and tilts up, and the first magnetic part and the second magnetic part move away from each other, and the circuit board is placed on the support frame 1. Then release the upper clamp 801, and the first magnetic part and the second magnetic part attract each other, thereby clamping the circuit board. When taking the material, press the upper clamp 801 again to release the circuit board. In addition, when the material clamp 8 is partially damaged, the operator can use the shaft removal groove 402 set on the support frame 1 to remove the pivot 803 from the shaft removal groove 402. At this time, the upper clamp 801, the lower clamp 802 and the pivot 803 are separated, so that the damaged parts can be replaced.

[0053] In this embodiment, the circuit board is clamped and limited by the material clamp 8, so that the circuit board remains flat and stable in the material tray, which can prevent the circuit board from warping and deforming during storage, transportation, processing and other production processes, facilitates automated production, and ensures product quality.

[0054] like Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 As shown, in a preferred embodiment, a tapered hole 702 is provided on the upper surface of the support frame 1, and a positioning taper pin 701 is correspondingly provided on the lower surface of the support frame 1. The tapered hole 702 passes through the positioning taper pin 701, and a limiting step 703 is provided on the outer side of the positioning taper pin 701.

[0055] When two trays are stacked, the positioning pin 701 of the upper tray mates with the tapered hole 702 of the lower tray, ensuring precise positioning between the trays and providing strong guiding capabilities. A limiting step 703 is provided to limit the depth of the positioning pin 701 inserted into the tapered hole 702, preventing it from being inserted too deeply into the tapered hole 702. This allows for smoother separation of the trays without jamming, improving production efficiency. Furthermore, the spacing between the positioning pins 701 on opposite sides of the support frame 1 is different, providing a foolproof effect and preventing the trays from being incorrectly placed due to human error. Furthermore, the tapered hole 702 passes through the positioning pin 701, facilitating drainage after cleaning, preventing water from accumulating in the tapered hole 702, and facilitating cleaning and drying.

[0056] like Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8As shown, in a preferred embodiment, a support edge 2 for supporting the periphery of the circuit board is provided on the inner edge of the support frame 1, and the upper surface of the support edge 2 is lower than the upper surface of the support frame 1. A protective rubber strip 201 is provided on the support edge 2 near the material clamp 8, and a protective rubber strip 201 is also provided at the corresponding position of the upper clamp 801. The surface of the protective rubber strip 201 is provided with an anti-slip texture. The protective rubber strip 201 is soft in texture to prevent damage to the circuit board and is particularly suitable for ultra-thin circuit boards with a thickness of 30-40 microns. It can also be in close contact with the circuit board, and the anti-slip texture increases friction to ensure the clamping stability of the material clamp 8. A supporting slope 202 is provided on the inner edge of the support edge 2 to support smaller circuit boards. The supporting slope 202 has different support areas at different heights, thereby supporting circuit boards of different sizes. The protective rubber strip 201 can be detachably installed on the supporting frame 1 and the upper clamp 801. Both the supporting frame 1 and the upper clamp 801 are provided with mounting holes. The protective rubber strip 201 is provided with a connecting column passing through the mounting hole. The diameter of the end of the connecting column is larger than the diameter of the mounting hole, which can prevent the protective rubber strip 201 from falling off. The protective rubber strip 201 is elastic, and the end of the connecting column can be elastically deformed to pass through the mounting hole during installation or disassembly.

[0057] The top of the supporting frame 1 is snap-connected with a direction mark 11 . The direction mark 11 is a distinct color different from the color of the tray body and is sunken a certain size on the side.

[0058] Lifting slots 3 are symmetrically positioned on the outside of two opposing sides of the support frame 1. These slots 3 include corresponding notches 301 and notches 302 positioned above and below. When multiple trays are stacked, the lifting slots 3 of the different trays lie on the same vertical line. Tray covers (not shown in the figure, the same applies below) are located above the top tray and below the bottom tray, respectively. A circuit board support wire installation location is reserved on the back of the trays. A closed step 101 is located at the top of the support frame 1, with a support surface 102 positioned outside the closed step 101. A closed frame 103 is located at the bottom of the support frame 1.

[0059] In this embodiment, when multiple material trays are stacked, an internal storage space can be formed. The closed frame 103 of the upper material tray is pressed on the support surface 102 of the lower material tray, and then the material tray covers are added on the upper and lower sides to form a closed environment. The circuit board is in a closed environment, so that the board surface of the circuit board can be prevented from contacting other objects during the storage and transportation of the material tray, reducing dust from entering the material tray during transportation and polluting the quality of the circuit board.

[0060] like Figure 2 、 Figure 7 As shown, in a preferred embodiment, the inner edge of the closed step 101 is used to position the circuit board, and the inner edge of the closed step 101 is uneven, forming a segmented positioning portion, reducing the contact area with the circuit board, reducing friction, thereby reducing debris and dust, preventing debris and dust from contaminating the circuit board, improving production yield, and ensuring production quality.

[0061] like Figure 2 and Figure 6 As shown, in a preferred embodiment, a lifting slot 3 is provided on the supporting frame 1, and an arc-shaped opening 303 is provided between the notch 301 and the gap 302 of the lifting slot 3. The arc-shaped opening 303 is designed for guiding positioning, which is beneficial to the precise positioning of the material tray.

[0062] like Figure 2 As shown, in a preferred embodiment, positioning slots 6 are provided on the outer sides of two opposing edges of the support frame 1, and these slots 6 and the lifting slots 3 are located on two adjacent sides. These slots 6 are used to mate with positioning blocks on a carrier or fixture to position the tray. Furthermore, the positioning slots 6 on either side of the tray form a triangular pattern. In this embodiment, the tray utilizes a three-point positioning method on its outer edges to coordinate with a carrier, such as a cart or automated guided vehicle (AGV). Combined with the sensing slots 5, this makes it more suitable for automated production.

[0063] In a preferred embodiment, the support frame 1 is made of antistatic material, which can be modified polycarbonate (PC), polyamide (PA, commonly known as nylon) or acrylonitrile-styrene-butadiene copolymer (ABS), to prevent static electricity and ensure the safety of circuit board production.

[0064] like Figure 2 、 Figure 8 As shown, in a preferred embodiment, the edge of the support frame 1 is provided with wear-resistant members 104. Wear-resistant members 104 are located in locations frequently contacted by other tools and equipment, such as the lifting slots 3 and the positioning slots 6. Wear-resistant members 104 are made of a wear-resistant material such as polyamide (PA) or polytetrafluoroethylene (PTFE). Wear-resistant members 104 improve the wear resistance of these locations, extend the life of the tray, reduce debris and dust generated by friction, keep the tray clean, prevent contamination of the circuit board, improve production yield, and ensure production quality.

[0065] like Figure 2 and Figure 5 As shown, in a preferred embodiment, sensing slots 5 are further provided on the outer sides of two opposing sides of the support frame 1. The sensing slots 5 include two arcuate slots and a strip edge positioned between the two arcuate slots. The sensing slots 5 are used in conjunction with external sensors, most of which are photoelectric beam sensors. These sensors can detect the position and quantity of the trays passing through the sensing slots 5, thereby enabling the use of the trays in automated equipment.

[0066] like Figure 2As shown, in a preferred embodiment, a positioning detection through hole 105 is provided on each side of the supporting frame 1. The positioning detection through hole 105 is waist-shaped or half-waist-shaped, extending from the outer edge to the inner edge of the supporting frame 1. When the circuit board is placed on the material tray, the through hole is partially blocked, which facilitates the photoelectric sensor to locate the edge of the circuit board through the positioning detection through hole 105, thereby positioning the circuit board.

[0067] like Figure 2 As shown, in a preferred embodiment, a clamping and taking board opening 13 is provided on the inner side of each of the four corners of the material tray, which can be used by the equipment to take the board clamping mechanism and use the circuit board clamping mechanism to clamp and place the circuit board.

[0068] like Figure 3 As shown, in a preferred embodiment, the lower surface of the supporting frame 1 is provided with structural reinforcement ribs, and the structural reinforcement ribs are crisscrossed to improve the structural strength of the bottom of the material tray, so that the material tray is not easily damaged and has a long service life.

[0069] like Figure 2 and Figure 3 As shown, in a preferred embodiment, a removable identification member 12 is attached to the support frame 1. Identification member 12 is provided with a QR code, serial number, barcode, or a combination of different identifications. Identification members 12, provided on opposite sides of the support frame 1, facilitate recording and tracing the use of the material tray and the production of the circuit boards therein, thereby facilitating regular cleaning of the material tray and recording its service life. Identification member mounting slots are provided on the support frame 1, into which identification member 12 is snap-fitted.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A clamping tray suitable for the production of ultra-thin circuit boards, characterized in that: It comprises a supporting frame, to which a supporting member is detachably connected, and the supporting member extends to an opening area in the middle of the supporting frame for auxiliary support of a circuit board.

2. The clamping tray according to claim 1, which is suitable for the production of ultra-thin circuit boards, is characterized in that: The support member is in line contact or point contact with the circuit board.

3. The clamping tray adapted for the production of ultra-thin circuit boards according to claim 1, characterized in that: The support member includes a core portion, and a protective portion is provided on the outer side of the core portion.

4. The clamping tray adapted for the production of ultra-thin circuit boards according to claim 1, characterized in that: The inner edge of the support frame is provided with a supporting edge for supporting the periphery of the circuit board, and the inner edge of the supporting edge is provided with a supporting inclined surface.

5. The clamping tray adapted for the production of ultra-thin circuit boards according to claim 1, characterized in that: The edge of the supporting frame is provided with a wear-resistant part.

6. The clamping tray suitable for the production of ultra-thin circuit boards according to claim 1, characterized in that: A limiting groove is provided on the supporting frame, and the end of the supporting member passes through the limiting groove. A positioning member is provided on the supporting member, and the positioning member abuts against the groove wall of the limiting groove.

7. The clamping tray suitable for the production of ultra-thin circuit boards according to claim 1, characterized in that: The supporting frame is detachably connected with an identification piece.

8. The clamping tray suitable for the production of ultra-thin circuit boards according to claim 1, characterized in that: The support frame is detachably connected with a material clamp.

9. The clamping tray suitable for the production of ultra-thin circuit boards according to claim 8, characterized in that: The support frame is provided with a mounting notch, a mounting boss is provided in the mounting notch, and a positioning hole is provided on the boss; The material clamp includes an upper clamp and a lower clamp, the lower clamp is provided with a positioning column engaged with the positioning hole, the lower clamp is provided with a first magnetic member, the upper clamp is provided with a second magnetic member engaged with the first magnetic member, the lower clamp is provided with a pivot shaft, and the upper clamp is rotatably sleeved on the pivot shaft; The supporting frame is provided with shaft unloading grooves at both ends of the pivot.

10. The clamping tray suitable for the production of ultra-thin circuit boards according to claim 1, characterized in that: The upper surface of the support frame is provided with a tapered hole, and the lower surface of the support frame is correspondingly provided with a positioning tapered pin.

Images