Membrane switch production laser cutting machine convenient to clean

Abstract

The invention discloses a membrane switch production laser cutting machine convenient to clean, and relates to the technical field of precision machining in electronic manufacturing, the membrane switch production laser cutting machine comprises a laser cutting machine body, and two pairs of hinged supporting arm assemblies are arranged in a cavity area in the middle of a cutting table of the laser cutting machine body; the two pairs of supporting arm assemblies form a foldable rectangular frame through a hinge structure, and each supporting arm assembly comprises a main arm extending in the longitudinal direction. Controllable bending force is synchronously applied to the membrane switch through folding actions of the foldable supporting arms, so that a material is locally slightly bent and deformed, and interlayer adhesive force between a waste material and a finished product material is weakened. And the internal stress of the bent film is redistributed, so that the bonding strength of waste materials at the cutting edge and the substrate is reduced, and the bent film is easier to naturally fall off under gravity or slight vibration, thereby facilitating collection of finished product materials and waste materials after cutting and improving the sanitary environment of a cutting table.

Description

Technical Field

[0001] The present invention relates to the field of precision machining in electronic manufacturing, and particularly to a laser cutting machine for producing membrane switches that is convenient for cleaning. Background Art

[0002] In the manufacturing process of membrane switches, laser cutting technology is widely used in the product forming process due to its high precision and high efficiency. As a key component for realizing the touch function in electronic devices, the surface of a membrane switch usually needs to be cut out with functional areas of specific shapes, such as key contours, circuit isolation grooves, or interface positioning holes. Due to the diverse product designs, multiple complex geometric shapes often need to be cut out on the same piece of membrane material, and in the same area, the finished materials and waste materials may need to be cut in layers. After cutting, both the finished materials and waste fragments remain on the surface of the cutting table. In particular, the tiny waste chips generated by fine cutting are easily attached to the gaps between the table surface or mechanical structure gaps.

[0003] The cutting tables of traditional laser cutting devices mostly adopt fixed support frames. During the processing, the finished materials and waste materials generated lack effective separation and often directly adhere tightly to the table surface. Especially for thin and light materials such as membrane switches, after laser cutting, the edges of the finished materials and waste materials are easily slightly melted due to the thermal effect and adhere to the table surface. The finished materials are also pressed tightly on the table surface due to the action of gravity and are difficult to be completely separated by conventional vibration or blowing methods. Operators need to frequently pause the operation and manually peel, scrape, or use a dust suction tool to clean piece by piece, which is not only inefficient but also easily damages the edges of the finished products or leaves tiny debris residues due to improper operation. Summary of the Invention

[0004] The purpose of the present invention is to solve the drawback that the finished materials and waste materials on the cutting table of a laser cutting machine in the prior art cannot be automatically cleaned and collected, and to propose a laser cutting machine for producing membrane switches that is convenient for cleaning.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions: A laser cutting machine for producing membrane switches that is convenient for cleaning, including a laser cutting machine body. In the middle cavity area of the cutting table of the laser cutting machine body, there are two pairs of mutually hinged support arm assemblies. The two pairs of support arm assemblies form a foldable rectangular frame through the hinge structure. Each support arm assembly includes a main arm extending longitudinally. Among them, at the ends of the two main arms on the same side of the rectangular frame, a first connecting rod with an arc-shaped groove is fixedly connected. At the ends of the two main arms on the other side of the rectangular frame, a second connecting rod with a round shaft at the end is fixedly connected. The round shaft of the second connecting rod forms a sliding fit with the arc-shaped groove of the first connecting rod.

[0006] Preferably, a positioning assembly that can move along the length direction of the main arm is slidably assembled on the upper surface of the main arm. The positioning assembly includes a moving frame, a lower clamping plate, an upper clamping plate, and a locking member. Both ends of the lower clamping plate are respectively fixedly connected to the middle of the moving frame on the same side. An opening and closing member is provided at the end of the moving frame. Above both ends of the upper clamping plate, they are respectively fixedly connected to the lower ends of the two opening and closing members on the same side. The upper clamping plate and the lower clamping plate have the same area. The locking member is used to fix the position of the moving frame.

[0007] Preferably, the opening and closing member includes a pull rod slidably arranged on the top of the moving frame, and a first spring is sleeved on the pull rod.

[0008] Preferably, the locking member includes a connecting groove opened on the side surface of the main arm. The connecting groove is communicated with the inner wall of the main arm. A bolt is threadedly arranged on the side surface of the moving frame, and one end of the bolt passes through the connecting groove.

[0009] Preferably, a connecting assembly is provided at one end of the main arm. The connecting assembly includes a rotating block, a connecting block, a mounting member, and a moving member. The rotating block and the connecting block are rotatably connected by a shaft. The mounting member is used to fix the connecting block to the inner wall of the laser cutting machine body. The rotating block and the main arm are connected by the moving member.

[0010] Preferably, the mounting member includes four mounting blocks and two mounting rods. The mounting rods are horizontally installed on both sides of the inner wall of the laser cutting machine body, and the mounting blocks are symmetrically clamped on the two mounting rods.

[0011] Preferably, two motors are fixedly provided on the outside of the laser cutting machine body. The output ends of the two motors are fixedly provided with rotating shafts, and the two rotating shafts are respectively connected to the shaft between the two rotating blocks and the connecting block.

[0012] Preferably, a convex block is fixedly provided at the end of the main arm, and four guide rods are fixedly provided on the inner wall of the laser cutting machine body. The convex block is attached to one side of the guide rods.

[0013] Preferably, the moving member includes two limiting rods. The limiting rods are fixedly connected to both sides of the rotating block. The ends of the limiting rods away from the rotating block pass through both sides of the main arm, and a second spring is sleeved on the limiting rods.

[0014] Preferably, an inclined blanking plate is fixedly provided on the inner wall of the laser cutting machine body. An outlet is opened on one side of the laser cutting machine body, and the inclined end of the blanking plate is connected to the outlet.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In the present invention, a controllable bending force is applied to the membrane switch synchronously through the folding action of the foldable support arm, causing local micro-bending deformation of the material and weakening the interlayer adhesion between the waste material and the finished material. After bending, due to the redistribution of internal stress in the membrane, the bonding strength between the waste material at the cutting edge and the substrate is reduced, and it is more likely to naturally fall off under gravity or slight vibration, facilitating the collection of the finished material and waste material after cutting and improving the sanitary environment of the cutting table. 2. In the present invention, a guide rod is provided on the path of rotation of the main arm, and the semi-circular block on the guide rod cooperates with the convex block on the main arm, causing a continuous small swing during the process of the main arm driving the switch membrane to bend, enabling the finished material and waste material cut from the switch membrane to quickly fall off and improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure of the cutting table of the present invention; Figure 3 is a schematic diagram of the internal structure of the cutting table of the present invention; Figure 4 is a schematic diagram of the connection structure of the four support arm assemblies of the present invention; Figure 5 is a schematic diagram of the connection structure of two opposite support arm assemblies of the present invention; Figure 6 is a schematic diagram of the structure of two opposite support arm assemblies of the present invention; Figure 7 is a schematic diagram of the structure of the main arm of the present invention; Figure 8 is a schematic diagram of the structure of the positioning assembly of the present invention; Figure 9 is a schematic diagram of the structure of the guide rod of the present invention.

[0017] Reference numerals in the drawings: 1, laser cutting machine body; 11, support arm assembly; 111, main arm; 112, first connecting rod; 113, second connecting rod; 2, positioning assembly; 21, moving frame; 22, lower clamping plate; 23, upper clamping plate; 3, opening and closing member; 31, pull rod; 32, first spring; 4, locking member; 41, connecting groove; 42, bolt; 5, connecting assembly; 51, rotating block; 52, connecting block; 6, mounting block; 61, mounting rod; 7, rotating shaft; 71, motor; 8, guide rod; 81, convex block; 9, moving member; 91, limiting rod; 92, second spring; 10, blanking plate; 100, discharge port. Detailed implementation manners

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0020] In the description of this specification, the descriptions referring to terms such as "embodiment", "one embodiment", "some implementation manners", "exemplarily", and "one implementation manner" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or implementation manner are included in at least one embodiment or implementation manner of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or implementation manner. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or implementation manners in a suitable manner.

[0021] Embodiment: This embodiment provides a laser cutting machine for the production of membrane switches that is convenient for cleaning. Refer to Figures 1-9 , specifically, it includes a laser cutting machine body 1. In the middle cavity area of the cutting table of the laser cutting machine body 1, there are two pairs of mutually hinged support arm assemblies 11. The two pairs of support arm assemblies 11 form a foldable rectangular frame through a hinged structure. Each support arm assembly 11 includes a main arm 111 extending longitudinally. Among them, at the ends of the two main arms 111 on the same side of the rectangular frame, a first connecting rod 112 with an arc-shaped groove is fixedly connected. At the ends of the two main arms 111 on the other side of the rectangular frame, a second connecting rod 113 with a round shaft at the end is fixedly connected. The round shaft of the second connecting rod 113 forms a sliding fit with the arc-shaped groove of the first connecting rod 112.

[0022] In this embodiment, a cavity communicating with the interior is provided at the middle position of the cutting table of the laser cutting machine body 1. Four support arm assemblies 11 arranged in the cavity form a cutting area. The support arm assemblies 11 are parallel to the surface of the cutting table, facilitating the laying of the switch film. After the switch film is cut at the rectangular frame formed by the support arm assemblies 11, the four main arms 111 rotate synchronously towards the interior of the cutting table, driving the switch film to bend. The bending operation will cause local stress concentration inside the switch film material, resulting in a decrease in the interlayer adhesion force, making the finished material and waste at the cutting edge more likely to fall off due to the weakened adhesion force; the first connecting rod 112 and the second connecting rod 113 form a straight rod with two opposite main arms 111, which is used to support the switch film. When the main arm 111 rotates towards the interior of the cutting table, the shaft of the second connecting rod 113 will move along the groove of the first connecting rod 112, keeping the two opposite support arm assemblies 11 always connected together, and making the rotation angles and speeds of the two opposite support arm assemblies 11 the same, effectively controlling the bending angle.

[0023] In the specific implementation process, as Figure 7 and Figure 8 shown, a positioning assembly 2 that can move along the length direction of the main arm 111 is slidably assembled on the upper surface of the main arm 111. The positioning assembly 2 includes a moving frame 21, a lower clamping plate 22, an upper clamping plate 23, and a locking member 4. The two ends of the lower clamping plate 22 are respectively fixedly connected to the middle of the moving frame 21 on the same side. An opening and closing member 3 is provided at the end of the moving frame 21. The upper ends of the two sides of the upper clamping plate 23 are respectively fixedly connected to the lower ends of the two opening and closing members 3 on the same side. The upper clamping plate 23 and the lower clamping plate 22 have the same area. The locking member 4 is used to fix the position of the moving frame 21.

[0024] In this embodiment, the lower end of the moving frame 21 is slidably arranged in the groove of the main arm 111. By adjusting the distance, it is used to clamp switch films of different widths. A lower clamping plate 22 and an upper clamping plate 23 are connected to the moving frame 21 on the same side. This not only facilitates the adjustment of the moving frames 21 on the two main arms 111 at the same time, but also the lengths of the upper clamping plate 23 and the lower clamping plate 22 cover the edges of the cutting area of the switch film, making the placement of the switch film more flat and improving the cutting accuracy. After the adjustment, the position of the moving frame 21 is fixed by the locking member 4. The upper clamping plate 23 is driven by the opening and closing member 3 to approach or move away from the lower clamping plate 22. The opening and closing member 3 adopts a pulling method, which is more convenient to move the upper clamping plate 23.

[0025] In the specific implementation process, as Figure 7 and Figure 8 shown, the opening and closing member 3 includes a pull rod 31 slidably arranged on the top of the moving frame 21. A first spring 32 is sleeved on the pull rod 31.

[0026] In this embodiment, the pull rod 31 is in the form of a combination of a ring and a rectangle, making it more convenient for the staff to lift. The upper end of the first spring 32 is connected to the ring, and the lower end is connected to the upper surface of the moving frame 21. When pulling the pull rod 31, the lower end of the pull rod 31 drives the upper clamping plate 23 away from the lower clamping plate 22 and stretches the first spring 32. When releasing the pull rod 31, the switch film is fixed between the lower clamping plate 22 and the upper clamping plate 23 by the thrust of the first spring 32, facilitating the operation of the staff.

[0027] In the specific implementation process, such as Figure 4 、 Figure 7 and Figure 8 shown, the locking member 4 includes a connection groove 41 opened on the side surface of the main arm 111. The connection groove 41 communicates with the inner wall of the main arm 111. A bolt 42 is threadedly provided on the side surface of the moving frame 21, and one end of the bolt 42 passes through the connection groove 41.

[0028] In this embodiment, the end of the bolt 42 passes through the connection groove 41 and enters the moving frame 21. By rotating the bolt 42, the bolt 42 is closely attached to the outer wall of the main arm 111, increasing the friction between the bolt 42, the moving frame 21 and the main arm 111, and fixing the position of the moving frame 21. The opening direction of the connection groove 41 is located at the middle inner cavity position of the cutting table, facilitating the operator to rotate the bolt 42 to adjust the position of the positioning component 2.

[0029] In the specific implementation process, such as Figure 4 、 Figure 5 and Figure 6 shown, one end of the main arm 111 is provided with a connection component 5. The connection component 5 includes a rotating block 51, a connection block 52, a mounting member and a moving member 9. The rotating block 51 and the connection block 52 are rotatably connected by a shaft. The mounting member is used to fix the connection block 52 to the inner wall of the laser cutting machine body 1, and the rotating block 51 and the main arm 111 are connected by the moving member 9.

[0030] In this embodiment, the main arm 111 is connected between the moving member 9 and the rotating block 51, enabling the main arm 111 to approach or move away from the rotating block 51. The rotating block 51 and the connection block 52 are rotatably connected. The rotating block 51 drives the main arm 111 to rotate by rotation, and the positioning component 2 on the main arm 111 changes synchronously to bend the switch film. The mounting member is used to fix the position of the connection block 52. A support arm assembly 11 is composed of multiple components, facilitating the replacement of damaged components and reducing production costs.

[0031] In the specific implementation process, such as Figure 4 、 Figure 5 and Figure 6 shown, the mounting member includes four mounting blocks 6 and two mounting rods 61. The mounting rods 61 are horizontally installed on both sides of the inner wall of the laser cutting machine body 1, and the mounting blocks 6 are symmetrically clamped on the two mounting rods 61.

[0032] In this embodiment, the outer wall of the mounting rod 61 is adapted to the inner wall of the mounting block 6. Two mounting blocks 6 are mounted on one mounting rod 61. The mounting blocks 6 are inserted from the end of the mounting rod 61 and move along the mounting rod 61 to adjust their positions, and finally are fixed by screws, which is convenient for installation and disassembly.

[0033] In the specific implementation process, such as Figure 2 , Figure 3 and Figure 4 shown, two motors 71 are fixedly arranged on the outside of the laser cutting machine body 1. The output ends of the two motors 71 are fixedly provided with rotating shafts 7. The two rotating shafts 7 are respectively connected to the shafts between the two rotating blocks 51 and the connecting block 52.

[0034] In this embodiment, the rotating shaft 7 is driven to rotate by the motor 71. One rotating shaft 7 is connected to the two rotating blocks 51 on the same side. The rotating shaft 7 synchronously controls the main arm 111 to rotate, providing power for the support arm assembly 11.

[0035] In the specific implementation process, such as Figure 4 , Figure 5 and Figure 9 shown, a convex block 81 is fixedly arranged at the end of the main arm 111. Four guide rods 8 are fixedly arranged on the inner wall of the laser cutting machine body 1. The convex block 81 is attached to one side of the guide rod 8.

[0036] In this embodiment, the upper end of the guide rod 8 is arc-shaped, and a plurality of semi-circular blocks with the same shape as the convex block 81 are evenly distributed on the side close to the main arm 111. The radian of the guide rod 8 is adapted to the rotation angle of the main arm 111. When the main arm 111 rotates, the convex block 81 will move from the bottom of the semi-circular block to the top. At this time, the main arm 111 will move away from the rotating block 51. The positioning assembly 2 on the main arm 111 will move synchronously. When the distance between the two opposite positioning assemblies 2 approaches, the bending angle of the switch film becomes larger. When the convex block 81 moves from the top of the semi-circular block to the bottom, the main arm 111 will move towards the rotating block 51. At this time, the bending angle of the switch film will recover somewhat. By continuously tilting the main arm 111, the convex block 81 continuously contacts the semi-circular block, causing the switch film to have a continuous small-amplitude swing during the bending process, enabling the finished material and waste material cut by the switch film to fall off quickly, improving the cleaning efficiency; by arranging guide rods 8 on the rotation path of each main arm 111, the swing amplitude is increased, and the material separation speed is improved.

[0037] In the specific implementation process, such as Figure 4 , Figure 5 and Figure 9 shown, the moving member 9 includes two limiting rods 91. The limiting rods 91 are fixedly connected to both sides of the rotating block 51. The ends of the limiting rods 91 far from the rotating block 51 pass through both sides of the main arm 111, and a second spring 92 is sleeved on the limiting rods 91.

[0038] In this embodiment, the limiting rod 91 not only connects the main arm 111 and the rotating block 51, but also restricts the moving direction of the main arm 111. When the convex block 81 moves upward along the guide rod 8, the main arm 111 will move back and forth along the limiting rod 91, and the second spring 92 enables the main arm 111 to quickly reset and increases the moving stability. One end of the second spring 92 is connected to the block on the side of the rotating block 51, and the other end is connected to the block on the side of the main arm 111. Due to the pulling force of the second spring 92, the convex block 81 always fits against the guide rod 8.

[0039] In the specific implementation process, as Figure 1 , Figure 2 and Figure 3 shown, an inclined blanking plate 10 is fixedly arranged on the inner wall of the laser cutting machine body 1, and a discharge port 100 is formed on one side of the laser cutting machine body 1. The inclined end of the blanking plate 10 is connected to the discharge port 100.

[0040] In this embodiment, the finished products and waste materials separated from the membrane switch will fall onto the blanking plate 10, slide along the inclined surface of the blanking plate 10, and leave the cutting machine through the discharge port 100, realizing the rapid collection of the finished products and waste materials.

[0041] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A laser cutting machine for the production of membrane switches that is convenient for cleaning, comprising a laser cutting machine body (1), characterized in that: In the middle cavity area of the cutting table of the laser cutting machine body (1), there are two pairs of support arm assemblies (11) hinged to each other. The two pairs of support arm assemblies (11) form a foldable rectangular frame through the hinge structure. Each support arm assembly (11) includes a main arm (111) extending longitudinally. The ends of the two main arms (111) on the same side of the rectangular frame are fixedly connected with a first connecting rod (112) with an arc-shaped groove. The ends of the two main arms (111) on the other side of the rectangular frame are fixedly connected with a second connecting rod (113) with a round shaft at the end. The round shaft of the second connecting rod (113) forms a sliding fit with the arc-shaped groove of the first connecting rod (112).

2. The laser cutting machine for manufacturing a membrane switch that is convenient for cleaning according to claim 1, wherein: A positioning assembly (2) that can move along the length direction of the main arm (111) is slidably assembled on the upper surface of the main arm (111). The positioning assembly (2) includes a moving frame (21), a lower clamping plate (22), an upper clamping plate (23) and a locking member (4). The two ends of the lower clamping plate (22) are respectively fixedly connected to the middle part of the moving frame (21) on the same side. An opening and closing member (3) is provided at the end of the moving frame (21). The upper ends of the two sides of the upper clamping plate (23) are respectively fixedly connected to the lower ends of the two opening and closing members (3) on the same side. The upper clamping plate (23) and the lower clamping plate (22) have the same area. The locking member (4) is used to fix the position of the moving frame (21).

3. The laser cutting machine for producing a membrane switch that is convenient for cleaning according to claim 2, wherein: The opening and closing member (3) includes a pull rod (31) slidably arranged on the top of the moving frame (21). A first spring (32) is sleeved on the pull rod (31).

4. A laser cutting machine for producing a membrane switch that is convenient for cleaning, as described in claim 2, wherein: The locking member (4) includes a connecting groove (41) opened on the side surface of the main arm (111). The connecting groove (41) is communicated with the inner wall of the main arm (111). A bolt (42) is threadedly arranged on the side surface of the moving frame (21). One end of the bolt (42) passes through the connecting groove (41).

5. A laser cutting machine for producing a membrane switch that is easy to clean, as described in claim 1, wherein: One end of the main arm (111) is provided with a connecting component (5). The connecting component (5) includes a rotating block (51), a connecting block (52), a mounting member and a moving member (9). The rotating block (51) and the connecting block (52) are rotatably connected by a shaft. The mounting member is used to fix the connecting block (52) to the inner wall of the laser cutting machine body (1). The rotating block (51) and the main arm (111) are connected by the moving member (9).

6. The laser cutting machine for producing a membrane switch that is convenient for cleaning according to claim 5, wherein: The mounting member includes four mounting blocks (6) and two mounting rods (61). The mounting rods (61) are horizontally installed on both sides of the inner wall of the laser cutting machine body (1). The mounting blocks (6) are symmetrically clamped on the two mounting rods (61).

7. The laser cutting machine for producing a membrane switch that is convenient for cleaning according to claim 5, wherein: Two motors (71) are fixedly arranged on the outside of the laser cutting machine body (1). The output ends of the two motors (71) are fixedly provided with rotating shafts (7). The two rotating shafts (7) are respectively connected to the shaft between the two rotating blocks (51) and the connecting block (52).

8. A laser cutting machine for producing a membrane switch that is easy to clean, as described in claim 1, wherein: A convex block (81) is fixedly arranged at the end of the main arm (111). Four guide rods (8) are fixedly arranged on the inner wall of the laser cutting machine body (1). The convex block (81) is attached to one side of the guide rod (8).

9. The laser cutting machine for producing membrane switches that is convenient for cleaning according to claim 5, wherein: The moving member (9) includes two limiting rods (91), the limiting rods (91) are fixedly connected to both sides of the rotating block (51), one end of each limiting rod (91) far from the rotating block (51) passes through both sides of the main arm (111), and a second spring (92) is sleeved on the limiting rod (91).

10. The laser cutting machine for producing a membrane switch that is convenient for cleaning according to claim 1, wherein: An inclined blanking plate (10) is fixedly arranged on the inner wall of the laser cutting machine body (1), a discharge port (100) is formed in one side of the laser cutting machine body (1), and the inclined end of the blanking plate (10) is connected to the discharge port (100).

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