Jig for pasting bubble film on frame

Abstract

A jig for attaching a bubble film to a frame comprises a shell, an ejecting and holding mechanism and a locking mechanism, the ejecting and holding mechanism comprises a supporting plate fixed in the shell and a plurality of ejector pins arranged in a dot matrix mode, the supporting plate is provided with a plurality of through holes matched with the ejector pins in number, the ejector pins can be inserted into the corresponding through holes in an up-down sliding mode, and the locking mechanism is used for locking the ejector pins. The locking mechanism comprises an elastic body located in the shell and located below the supporting plate, a movable plate located below the elastic body and a driving piece capable of driving the movable plate to move upwards to extrude the elastic body, the elastic body and the movable plate are each provided with a through hole corresponding to the through hole and allowing the ejector pin to penetrate through, and the shell is provided with an air connecting opening communicated with an air source. And the air connecting port is communicated with the inner cavity of the shell below the movable plate. With the adoption of the utility model, one jig can simultaneously meet the pasting between frames with different specifications and corresponding bubble films, so that the production cost can be reduced while the production efficiency is improved, and the whole structure is simple, the operation is convenient, and the locking is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of jigs, and particularly to the technical field of jigs for attaching a foam film to a frame. Background Art

[0002] The control panels on some electrical appliances often include a frame with various windows, a foam film attached to the outer surface of the frame, and a film (or panel) with printed patterns attached to the outer surface of the foam film. The foam film has adhesive on both sides, which is equivalent to double-sided tape, so that both sides of the foam film can be used to adhere to the frame and the film (or panel) respectively to play a connecting role and also have a sealing effect. Since the frame has windows with different shapes and quantities, corresponding perforations are also made on the foam film so that the light of the indicator lights of the electrical appliance can pass through the windows and perforations, and / or the keys required by the electrical appliance can be located in the windows and perforations.

[0003] In the actual production process, the operation of attaching the foam film to the frame is often completed manually. However, due to the multiple windows on the frame, even if the operator is careful, there will still inevitably be a phenomenon of incomplete fitting, resulting in the misalignment of the above-mentioned perforations and windows, which affects the subsequent use of the frame. For this reason, jigs have been designed. Generally, a groove for the frame to sit in is opened on the main body of the jig. During pasting, first place the foam film in the groove, and then place and press down the frame to quickly complete the assembly operation. Therefore, by using the jig, the pasting efficiency of the foam film can be significantly improved, and the pasting quality can also be ensured.

[0004] However, due to the large number of frame specifications, a corresponding large number of jigs need to be configured, which will lead to an increase in cost and inconvenience in jig management. At present, in other industries, there are soft jigs (also called fixtures), which usually include a clamping mechanism and a locking mechanism. The clamping mechanism includes a box body connected to the locking mechanism and a plurality of columnar fingers that can slide up and down in the box body. The plurality of columnar fingers are arranged in a dot matrix, and the lower ends of the columnar fingers are supported in the box body by springs. When clamping, the columnar fingers slide after being pressed, that is, they can undulate according to the shape of the product, and then a support surface matching the shape of the product is formed by profiling. Then, the locking mechanism is used to position each columnar finger. For example, Chinese Patent Authorization Publication No. CN216178431U discloses such a fixture.

[0005] However, such a fixture cannot be directly applied to the above-mentioned frame for the operation of attaching the foam film, so it still needs to be further improved. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a jig for attaching a foam film to a frame according to the current situation of the prior art, so as to improve production efficiency and reduce production costs.

[0007] The technical solution adopted by the present utility model to solve the above technical problems is as follows: A fixture for attaching a foam film to a frame, comprising a housing with an open upper end, a holding mechanism and a locking mechanism installed in the housing. The holding mechanism further includes a support plate fixed in the housing and a plurality of ejector pins arranged in a dot matrix. A plurality of through holes matching the number of ejector pins are formed in the support plate along its thickness direction, and each ejector pin is slidably inserted into the corresponding through hole. The locking mechanism is used to lock the ejector pins. It is characterized in that: the locking mechanism includes an elastic body located in the housing and below the support plate, a movable plate below the elastic body, and a driving member capable of driving the movable plate to move upward to squeeze the elastic body. Through holes corresponding to the through holes are formed in both the elastic body and the movable plate for the ejector pins to pass through. At the same time, an air inlet connected to an air source is formed in the housing, and the air inlet is connected to the inner cavity of the housing below the movable plate, so that the compressed gas in the inner cavity can lift the ejector pins.

[0008] In the above solution, the driving member preferably adopts the following structure. It includes two wedge block groups respectively inserted into the slots on the corresponding side walls of the housing. Each wedge block group includes an upper wedge block and a lower wedge block that are in inclined surface cooperation with each other up and down. The movable plate is placed on the upper wedge blocks of each wedge block group. One end of the lower wedge block of each wedge block group is exposed outside the housing, and the inclination angle of the above inclined surface needs to satisfy: tgα < μ, where α is the inclination angle of the inclined surface and μ is the friction coefficient between the inclined surfaces. This structure is simple and convenient to operate, and the locking is reliable.

[0009] In order to ensure the sealing between the moving lower wedge block and the housing, preferably, an operating rod is designed on one end of the lower wedge block, and a telescopic sealing tube is sleeved on the operating rod. The inner end of the sealing tube is fixed to the housing, and the outer end of the sealing tube is fixed to the operating rod.

[0010] In order to facilitate applying force to the operating rod, a hammer bead is also movably sleeved on the operating rod outside the sealing tube. At the same time, protrusions are provided on both sides of the hammer bead on the operating rod and can impact the hammer bead. By using the impact of the hammer bead, force can be applied easily, and with such an arrangement, the hammer bead will not be lost.

[0011] In the above preferred solution, in order to ensure the synchronous movement of the two lower wedge blocks, a connecting rod can be fixed between the operating rods of the two wedge block groups. Or a scale line capable of indicating the moving distance of the operating rod can also be provided on the operating rod. By using the scale line, the moving distances of the two lower wedge blocks can be known, and finally, it can be ensured that the two lower wedge blocks move the same distance.

[0012] Preferably, a positioning piece is fixed on the inner wall of the upper port of the housing for the frame to lean on.

[0013] To play a better positioning role, a rubber sleeve is sleeved on the ejector pin.

[0014] To ensure that the compressed gas can smoothly lift each ejector pin, the gas inlet is connected to the gas source through a gas pipeline, and a constant pressure valve can be installed on the gas pipeline.

[0015] Compared with the prior art, since the utility model can use the gas in the inner cavity of the shell to lift each ejector pin, and at the same time, the movable plate can be lifted by means of the driving member to squeeze the elastic body to realize the positioning of each ejector pin. Therefore, when the foam needs to be attached to the frame, as long as the frame is first placed on the ejector pins and pressed down to make the corresponding ejector pins move down to the appropriate position, and then locked by the driving member, a concave area matching the shape of the frame can be formed at this time. Then, the frame is removed, the foam is placed in the concave area, and then the frame is put in to realize the bonding of the two. Obviously, after adopting the utility model, concave areas of corresponding sizes will be generated for different specifications of frames, so that a jig can simultaneously meet the sticking between different specifications of frames and the corresponding foams, which can improve the production efficiency while reducing the production cost, and the overall structure is simple, and it is not affected by the elastic fatigue of the spring in the prior art, has a long service life, is convenient to operate, and is reliable in locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of an embodiment of the utility model (the ejector pins are in the original state of being fully lifted);

[0017] Figure 2 is Figure 1 the three-dimensional schematic diagram after opening the side plate in (partially disassembled);

[0018] Figure 3 is Figure 2 the further disassembled schematic diagram of;

[0019] Figure 4 is Figure 1 the three-dimensional schematic diagram after pre-placing the frame in;

[0020] Figure 5 is Figure 4 the three-dimensional schematic diagram after removing the frame in;

[0021] Figure 6 is Figure 5 the three-dimensional cross-sectional schematic diagram when the foam and the frame are successively placed and bonded together in. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the present utility model in detail with reference to the embodiments of the drawings.

[0023] As Figures 1 to 6As shown in the figure, this fixture is used to attach the foam 10 to the frame 20. It includes a housing 1, a holding mechanism 2 and a locking mechanism 3 installed in the housing 1. The housing 1 is designed as a square box with an open upper end (of course, it is not limited to this square structure). The left and right side walls are designed as detachable end covers, namely the left end cover 11 and the right end cover 12. An air inlet 111 is opened on the left end cover 11, and this air inlet 111 can be connected to a gas source through an air pipe (not shown). An operation hole 121 is opened on the right end cover for the operation rod 35 described below to extend out.

[0024] The above-mentioned holding mechanism 2 further includes a support plate 21 fixed in the housing 1 and a plurality of ejector pins 22 arranged in a dot matrix. There are various ways to fix the support plate 21 in the housing 1. In the figure, positioning grooves 13 with corresponding heights are opened on the front and rear side walls of the housing 1. The two edges of the support plate 21 are respectively inserted into the corresponding positioning grooves 13, so as to facilitate and quickly achieve fixation. At the same time, a plurality of through holes 211 matching the number of ejector pins 22 are opened along the thickness direction of the support plate 21. Each ejector pin 22 can be slidably inserted into the corresponding through hole 211. At this time, the gap between the ejector pin 22 and the through hole 211 should not be too large, and there can be a certain damping force.

[0025] The locking mechanism 3 is used to lock the above-mentioned ejector pins 22. In this embodiment, the locking mechanism 3 preferably adopts the following structure. It includes an elastic body 31 located in the housing 1 and below the support plate 21, a movable plate 32 located below the elastic body 31, and a driving member that can drive the movable plate 32 to move upward to squeeze the elastic body 31. Through holes A corresponding to the through holes 211 for the ejector pins 22 to pass through are opened on both the elastic body 31 and the movable plate 32. The elastic body 31 is a block similar in size to the movable plate 32. It can be made of materials such as sponge or rubber. As long as it can deform after being pressed, the through hole A on it also deforms to generate a large damping force on the corresponding ejector pin 22, so as to lock the ejector pin 22 at the required height position. At the same time, the air inlet 111 is connected to the inner cavity of the housing below the movable plate 32, so that the compressed gas in the inner cavity can lift each ejector pin 22. Please refer to Figure 1 , and in order to ensure that the ejector pins can be smoothly lifted and the lifting force is not too large, a constant pressure valve can be installed on the above-mentioned air pipe. The pressure set by the constant pressure valve can just lift the ejector pins, and they can be easily pressed down by hand.

[0026] The above-mentioned driving member can adopt various methods, such as using the piston rod of a cylinder to lift it. However, simply and conveniently, it includes two wedge block groups respectively inserted into the slots 14 on the front and rear side walls of the housing 1. Each wedge block group includes an upper wedge block 33 and a lower wedge block 34 that are in inclined surface fit with each other up and down. And the inclination angle of this inclined surface needs to satisfy: tgα < μ, where α is the inclination angle of the inclined surface and μ is the friction coefficient between the two inclined surfaces, so that the upper wedge block 33 and the lower wedge block 34 can self-lock after relative movement under the action of an external force; the movable plate 32 is placed on the upper wedge block 33 of each wedge block group. One end of the lower wedge block 34 of each wedge block group is designed with an operating rod 35, and this operating rod 35 passes through the operating hole 121 on the right end cover 12 of the housing and is exposed outside the above-mentioned housing 1. In the figure, in order to ensure the smooth sliding of the lower wedge block 34 left and right and the smooth upward support of the movable plate 32 by the upper wedge block 33, guiding grooves 15 with corresponding heights are opened on the front and rear side walls of the housing 1, and the above-mentioned slot 14 is a U-shaped groove with an upward opening and connected to the guiding groove 15.

[0027] Since the inner cavity under the movable plate 32 is filled with compressed gas, in order to prevent air leakage when the lower wedge block 34 moves, a telescopic sealing tube 4 is sleeved on the operating rod 35. The inner end of this sealing tube 4 is fixed on the outer surface of the right end cover 12 of the housing 1, and the outer end of this sealing tube 4 is fixed on the operating rod 35. And in order to conveniently push the operating rod 35, a hammer bead 5 is also movably sleeved on the operating rod 35 outside the sealing tube 4. The operating rod 35 is provided with convex portions 351 on both sides (the left and right sides in the figure) of this hammer bead 5. In this way, when the hammer bead 5 is moved to the right or left, the hammer bead will hit the corresponding convex portion 351, so that the operating rod 35 and the lower wedge block 34 can be easily moved to achieve the purpose of unlocking or locking the ejector pin 22.

[0028] In order to achieve the synchronous movement of the two operating rods 35, a connecting rod (not shown in the figure) can be fixed between the operating rods 35 of the two wedge block groups, and force can be applied to the connecting rod. Of course, scale lines indicating the moving distance of the operating rod can also be set on each operating rod 35. Through the relationship between the right end cover 12 and the corresponding scale lines, the moving distances of the operating rods 35 and the lower wedge block 34 can be intuitively known, and then the corresponding hammer bead 5 can be moved to make the right end cover 12 point to the same scale lines on the two operating rods, so as to ensure that the two lower wedge blocks 34 move the same distance.

[0029] Since there are many specifications of the frame 20, in order to prevent some frames 20 from not being able to closely adhere to the inner wall of the housing 1, a positioning piece 6 can be fixed on the inner wall of the upper port of the housing 1. This positioning piece 6 can adopt a magnetic patch and be directly adsorbed on the inner wall of the housing 1 for the frame 20 to lean against to play a positioning role.

[0030] Furthermore, considering that the windows on the frame 20 are of different sizes, a rubber sleeve can be provided to better play a positioning role. When necessary, the rubber sleeve can be placed on the ejector pin 22 to position the window with a larger aperture on the frame, which makes positioning more convenient.

[0031] It is understandable that, in order to prevent the ejector pins 22 from excessively moving upward under the action of compressed air, or completely detaching from the support plate 21 after the compressed air is removed, a limiting protrusion is provided at the lower end of each ejector pin 22, and the limiting protrusion can resist the movable plate to prevent the ejector pin from excessively moving upward. At the same time, the length of each ejector pin 22 is designed to be long enough, so that when there is no compressed air, the upper end of the ejector pin 22 that falls will not fall below the support plate 21.

[0032] When in use, first allow compressed air to enter the housing cavity below the movable plate 32 through the air inlet 111, and use the compressed air to move the ejector pins 22 upward so that the upper ends of the ejector pins 22 are flush and together form a Figure 1 Next, the frame 20 (the frame is schematically drawn as a box-shaped body in the figure, but in reality, the frame can be a plate-shaped body with a window as required) is pre-placed on the ejector pin for pressing down, see Figure 4 , so that the corresponding ejector pins below it move down to a suitable position. At this time, some ejector pins below it can be inserted into the window of the frame to play a positioning role. When the frame 20 is pressed in, its left end can also be pressed against the positioning piece 6; then move the hammer ball 5 to the left to make it hit the protruding portion 351 on the left, so that the operating rod 35 and the lower wedge block 34 move to the left, drive the upper wedge block 33 to move up, and then drive the movable block 32 to move up and squeeze the entire elastic body 31. As the elastic body 31 deforms, it holds each ejector pin 22 and locks each ejector pin 22, so that each ejector pin 22 is kept in the required positioning state. At this time, take away the frame 20 to form the required recessed area on the top plane, see 5; then, put the bubble film 10 to be glued in the recessed area (the bubble film in the figure is only schematically drawn as a square ring body. In fact, the bubble film of the corresponding shape can be drawn according to the shape of the frame and the window configuration), and then put it into the frame 20 to achieve the connection between the two. Obviously, the utility model can be applied to the adhesion between frames of different specifications and corresponding bubble films, and has a simple overall structure, a long service life, and is simple and reliable to operate.

Claims

1. A jig for attaching a bubble film to a frame, comprising a shell (1) with an open upper end, a holding mechanism (2) and a locking mechanism (3) installed in the shell (1), wherein the holding mechanism (2) further comprises a support plate (21) fixed in the shell (1) and a plurality of ejector pins (22) arranged in a dot matrix, the support plate (21) having a plurality of through holes along its thickness direction matching the number of ejector pins (22), each ejector pin (22) being slidably inserted in a corresponding through hole (211) up and down, the locking mechanism (3) being used to lock the ejector pin (22), characterized in that: The locking mechanism (3) comprises an elastic body (31) located in the shell (1) and below the support plate (21), a movable plate (32) located below the elastic body (31) and a driving member capable of driving the movable plate (32) to move upward to squeeze the elastic body (31). The elastic body (31) and the movable plate (32) are both provided with through holes (A) corresponding to the through holes for the ejector pin (22) to pass through. At the same time, an air inlet (111) connected to an air source is provided on the shell (1). The air inlet (111) is connected to the inner cavity of the shell (1) below the movable plate (32) so that the compressed gas in the inner cavity can lift the ejector pin (22).

2. The fixture according to claim 1, characterized in that: The driving member comprises two wedge block groups respectively inserted into slots of corresponding side walls of the shell (1), each wedge block group comprises an upper wedge block (33) and a lower wedge block (34) whose upper and lower inclined surfaces cooperate with each other, the movable plate (32) is placed on the upper wedge block (33) of each wedge block group, one end of the lower wedge block (34) of each wedge block group is exposed from the shell (1), and the inclination angle of the above-mentioned inclined surface must satisfy: tgα<μ, wherein α is the inclination angle of the inclined surface, and μ is the friction coefficient between the inclined surfaces.

3. The fixture according to claim 2, characterized in that: An operating rod (35) is designed on one end of the lower wedge block (34), and a telescopic sealing tube (4) is sleeved on the operating rod (35). The inner end of the sealing tube (4) is fixed on the housing (1), and the outer end of the sealing tube (4) is fixed on the operating rod (35).

4. The fixture according to claim 3, characterized in that: The operating rod (35) is also movably covered with a hammer bead (5) located outside the sealing tube, and the operating rod is provided with protrusions (351) located on both sides of the hammer bead and capable of colliding with the hammer bead.

5. The fixture according to claim 3, characterized in that: A connecting rod is fixed between the operating rods of the two wedge block groups.

6. The fixture according to claim 3, characterized in that: The operating rod is provided with scale lines which can indicate the moving distance of the operating rod.

7. The jig according to any one of claims 1 to 6, characterized in that: A positioning piece (6) is fixed on the inner wall of the upper port of the shell (1) for the frame to lean against.

8. The jig according to any one of claims 1 to 6, characterized in that: The ejector pin (22) is sleeved with a rubber sleeve.

9. The jig according to any one of claims 1 to 6, characterized in that: The gas inlet (111) is connected to a gas source via a gas pipeline, and a constant pressure valve is installed on the gas pipeline.

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